Changed to allow TSA feature in web browser

Added explanation of simulating clearTimeout function.
Improved to support font subsetting and changed to use pdf-fontkit.
2024-08-24 12:17:43 +09:00 · 2024-08-19 21:54:15 +09:00 · 2024-08-19 21:33:38 +09:00 · 2024-08-18 21:32:27 +09:00 · 2024-08-17 11:51:46 +09:00 · 2024-08-10 20:34:50 +09:00
24 changed files with 7266 additions and 597 deletions
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@ -0,0 +1,16 @@
+name: Build
+run-name: Build for browser and GAS
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: ['lts/*']
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm ci
+      - run: npm run build
--- a/README.md
+++ b/README.md
@ -1,22 +1,117 @@
+<div align="center"><img src="logo.png" title="zgapdfsigner"></div>
+
 # ZgaPdfSigner
-A javascript tool to sign a pdf in web browser.  
-And it also can be used in Google Apps Script.  
+![version](https://img.shields.io/github/package-json/v/zboris12/zgapdfsigner)
+![license](https://img.shields.io/github/license/zboris12/zgapdfsigner)
+![build status](https://github.com/zboris12/zgapdfsigner/actions/workflows/build.yml/badge.svg)
+
+A javascript tool to sign a pdf or set protection of a pdf in web browser.  
+And it is more powerful when used in [Google Apps Script](https://developers.google.com/apps-script) or [nodejs](https://nodejs.org/).  

 PS: __ZGA__ is the abbreviation of my father's name.  
 And I use this name to hope the merits from this application will be dedicated to my parents.

+## Main features
+
+* Sign a pdf with an invisible pkcs#7 signature.
+* Sign a pdf with a visible pkcs#7 signature by drawing an image or a text or both.
+* A visible signature can be placed on multiple pages. (In the same position)
+* Sign a pdf and set [DocMDP](https://github.com/zboris12/zgapdfsigner/wiki/API#note).
+* Add a new signature to a pdf if it has been signed already. (An incremental update)
+* Add a document timestamp from [TSA](https://github.com/zboris12/zgapdfsigner/wiki/API#note). ( :no_entry_sign:__Not__ available in web browser :sunflower:)
+* Sign a pdf with a timestamp from [TSA](https://github.com/zboris12/zgapdfsigner/wiki/API#note). ( :no_entry_sign:__Not__ available in web browser :sunflower:)
+* Enable signature's [LTV](https://github.com/zboris12/zgapdfsigner/wiki/API#note). ( :no_entry_sign:__Not__ available in web browser :sunflower:)
+* Set password protection to a pdf. Supported algorithms:
+  * 40bit RC4 Encryption
+  * 128bit RC4 Encryption
+  * 128bit AES Encryption
+  * 256bit AES Encryption
+* Set public-key certificate protection to a pdf.
+  Supported algorithms are as same as the password protection.
+
+## About signing with [TSA](https://github.com/zboris12/zgapdfsigner/wiki/API#note) and [LTV](https://github.com/zboris12/zgapdfsigner/wiki/API#note)
+
+Because of the [CORS](https://github.com/zboris12/zgapdfsigner/wiki/API#note) security restrictions in web browser,
+signing with a timestamp from [TSA](https://github.com/zboris12/zgapdfsigner/wiki/API#note) or enabling [LTV](https://github.com/zboris12/zgapdfsigner/wiki/API#note) can only be used in [Google Apps Script](https://developers.google.com/apps-script) or [nodejs](https://nodejs.org/).  
+:sunflower: However, if you can avoid the [CORS](https://github.com/zboris12/zgapdfsigner/wiki/API#note) security restrictions
+by creating your own service or providing a reverse proxy server, these features are also available in web browser.
+
 ## The Dependencies

 * [pdf-lib](https://pdf-lib.js.org/)
 * [node-forge](https://github.com/digitalbazaar/forge)
+* [follow-redirects](https://github.com/follow-redirects/follow-redirects)
+* [pako](https://github.com/nodeca/pako) - For drawing text
+* [pdf-fontkit](https://github.com/znacloud/pdf-fontkit) - For drawing text

 ## How to use this tool

+:question: For more details please see the [wiki](https://github.com/zboris12/zgapdfsigner/wiki/API).
+
+### Web Browser
 Just import the dependencies and this tool.
 ```html
-<script src="https://unpkg.com/pdf-lib/dist/pdf-lib.min.js" type="text/javascript"></script>
-<script src="https://unpkg.com/node-forge/dist/forge.min.js" type="text/javascript"></script>
-<script src="https://github.com/zboris12/zgapdfsigner/releases/download/1.1.0/zgapdfsigner.js" type="text/javascript"></script>
+<script src="https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js" type="text/javascript"></script>
+<script src="https://unpkg.com/node-forge@1.3.1/dist/forge.min.js" type="text/javascript"></script>
+<script src="https://cdn.jsdelivr.net/npm/zgapdfsigner/dist/zgapdfsigner.min.js" type="text/javascript"></script>
+```
+When drawing text for signature, importing fontkit and pako library is necessary.
+```html
+<script src="https://unpkg.com/pdf-fontkit@1.8.9/dist/fontkit.umd.min.js" type="text/javascript"></script>
+<script src="https://unpkg.com/pako@1.0.11/dist/pako_inflate.min.js" type="text/javascript"></script>
+```
+Thanks to [znacloud](https://github.com/znacloud/pdf-fontkit) for fixing the font subsetting issue in [@pdf-lib/fontkit](https://github.com/Hopding/fontkit).
+
+### [Google Apps Script](https://developers.google.com/apps-script)
+Load the dependencies and this tool.
+```js
+// Simulate setTimeout function for pdf-lib
+function setTimeout(func, sleep){
+  Utilities.sleep(sleep);
+  func();
+}
+// Simulate clearTimeout function for pdf-fontkit
+function clearTimeout(timeoutID){
+  // Do nothing
+}
+// Simulate window for node-forge
+var window = globalThis;
+// Load pdf-lib
+eval(UrlFetchApp.fetch("https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js").getContentText());
+// It is necessary for drawing text for signature.
+eval(UrlFetchApp.fetch("https://unpkg.com/pdf-fontkit@1.8.9/dist/fontkit.umd.min.js").getContentText());
+// Load pako, It is necessary for drawing text for signature.
+eval(UrlFetchApp.fetch("https://unpkg.com/pako@1.0.11/dist/pako_inflate.min.js").getContentText());
+// Load node-forge
+eval(UrlFetchApp.fetch("https://unpkg.com/node-forge@1.3.1/dist/forge.min.js").getContentText());
+// Load ZgaPdfSigner
+eval(UrlFetchApp.fetch("https://cdn.jsdelivr.net/npm/zgapdfsigner/dist/zgapdfsigner.min.js").getContentText());
+```
+Or simply import the library of [ZgaPdfToolkit](https://script.google.com/macros/library/d/1T0UPf50gGp2fJ4dR1rZfEFgKYC5VpCwUVooCRNySiL7klvIUVsFBCZ9m/7)
+1. Add the library of ZgaPdfToolkit to your project, and suppose the id of library you defined is "pdfkit".  
+   Script id: `1T0UPf50gGp2fJ4dR1rZfEFgKYC5VpCwUVooCRNySiL7klvIUVsFBCZ9m`
+2. Load the library.
+```js
+pdfkit.loadZga(globalThis);
+```
+
+### [nodejs](https://nodejs.org/)
+1. Install
+```
+npm install zgapdfsigner
+```
+If using [typescript](https://www.typescriptlang.org/) for development, installation of [definitely typed for node-forge](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node-forge) is necessary.
+```
+npm install --save-dev @types/node-forge
+```
+2. Import
+```js
+// CommonJS Mode
+const Zga = require("zgapdfsigner");
+// ES Module Mode
+import { default as Zga } from "zgapdfsigner";
+// Typescript
+import * as Zga from "zgapdfsigner";
 ```

 ## Let's sign
@ -35,6 +130,7 @@ async function sign1(pdf, cert, pwd){
  var sopt = {
    p12cert: cert,
    pwd: pwd,
+    permission: 1,
  };
  var signer = new Zga.PdfSigner(sopt);
  var u8arr = await signer.sign(pdf);
@ -42,7 +138,7 @@ async function sign1(pdf, cert, pwd){
 }
 ```

-Sign with a visible signature of a picture.
+Sign with a visible signature of an image.

 ```js
 /**
@ -65,9 +161,11 @@ async function sign2(pdf, cert, pwd, imgdat, imgtyp){
        w: 60,  // width
        h: 60,  // height
      },
+      imgInfo: {
        imgData: imgdat,
        imgType: imgtyp,
      },
+    },
  };
  var signer = new Zga.PdfSigner(sopt);
  var u8arr = await signer.sign(pdf);
@ -75,65 +173,286 @@ async function sign2(pdf, cert, pwd, imgdat, imgtyp){
 }
 ```

-Sign with a visible signature of drawing a text.
+Sign with a visible signature by drawing a text.

 ```js
-//TODO
+/**
+ * @param {ArrayBuffer} pdf
+ * @param {ArrayBuffer} cert
+ * @param {string} pwd
+ * @param {string} txt
+ * @param {ArrayBuffer} fontdat
+ * @return {Promise<Blob>}
+ */
+async function sign3(pdf, cert, pwd, txt, fontdat){
+  /** @type {SignOption} */
+  var sopt = {
+    p12cert: cert,
+    pwd: pwd,
+    drawinf: {
+      area: {
+        x: 25,  // left
+        y: 150, // top
+        w: 60,  // width
+        h: 60,  // height
+      },
+      textInfo: {
+        text: txt,
+        fontData: fontdat,
+        color: "#00f0f1",
+        size: 16,
+      },
+    },
+  };
+  var signer = new Zga.PdfSigner(sopt);
+  var u8arr = await signer.sign(pdf);
+  return new Blob([u8arr], {"type" : "application/pdf"});
+}
 ```

-Use it in Google Apps Script
+Use it in [Google Apps Script](https://developers.google.com/apps-script)

 ```js
-// Simulate setTimeout function for pdf-lib
-function setTimeout(func, sleep){
-  Utilities.sleep(sleep);
-  func();
-}
-// Simulate window for node-forge
-var window = globalThis;
-// Load pdf-lib
-eval(UrlFetchApp.fetch("https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js").getContentText());
-// Load node-forge
-eval(UrlFetchApp.fetch("https://unpkg.com/node-forge@1.3.1/dist/forge.min.js").getContentText());
-// Load ZgaPdfSigner
-eval(UrlFetchApp.fetch("https://github.com/zboris12/zgapdfsigner/releases/download/1.1.0/zgapdfsigner.js").getContentText());
-
+/**
+ * @param {string} pwd Passphrase of certificate
+ * @return {Promise}
+ */
+async function createPdf(pwd){
  // Load pdf, certificate
  var pdfBlob = DriveApp.getFilesByName("_test.pdf").next().getBlob();
  var certBlob = DriveApp.getFilesByName("_test.pfx").next().getBlob();
  // Sign the pdf
+  /** @type {SignOption} */
  var sopt = {
-  p12cert: new Uint8Array(certBlob.getBytes()),
-  pwd: "some passphrase",
+    p12cert: certBlob.getBytes(),
+    pwd,
+    signdate: "1",
+    ltv: 1,
  };
  var signer = new Zga.PdfSigner(sopt);
-var u8arr = await signer.sign(new Uint8Array(pdfBlob.getBytes()));
+  var u8arr = await signer.sign(pdfBlob.getBytes());
  // Save the result pdf to some folder
  var fld = DriveApp.getFolderById("a folder's id");
  fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.pdf"));
+}
 ```

-## Detail of SignOption
+Use queryPassword function in [ZgaPdfToolkit](https://script.google.com/macros/library/d/1T0UPf50gGp2fJ4dR1rZfEFgKYC5VpCwUVooCRNySiL7klvIUVsFBCZ9m/5).

-* __p12cert__:  (Uint8Array|ArrayBuffer|string) :point_right: Certificate's data
-* __pwd__:      string :point_right: The passphrase of the certificate
-* __reason__:   string :point_right: (Optional) The reason for signing
-* __location__: string :point_right: (Optional) Your location
-* __contact__:  string :point_right: (Optional) Your contact information
-* __signdate__: Date   :point_right: (Optional) The date and time of signing
-* __signame__:  string :point_right: (Optional) The name of the signature
-* __drawinf__:  SignDrawInfo :point_right: (Optional) Visible signature's information
-  * __area__: SignAreaInfo :point_right: The signature's drawing area
-    * __x__: number :point_right: Distance from left
-    * __y__: number :point_right: Distance from top
-    * __w__: number :point_right: Width
-    * __h__: number :point_right: Height
-  * __pageidx__: number :point_right: (Optional) The page index for drawing the signature
-  * __imgData__: Uint8Array|ArrayBuffer|string :point_right: (Optional) The image's data
-  * __imgType__: string :point_right: (Optional) The image's type, __only support jpg and png__
-  * __text__: string :point_right: (Optional) A text drawing on signature, __not implemented yet__
-  * __fontData__: PDFLib.StandardFonts|Uint8Array|ArrayBuffer|string :point_right: (Optional) The font's data for drawing text, __not implemented yet__
+```js
+function myfunction(){
+  var spd = SpreadsheetApp.getActiveSpreadsheet();
+  pdfkit.queryPassword("createPdf", "Please input the passphrase", spd.getName());
+}
+```

+Use it in [nodejs](https://nodejs.org/)
+```js
+const m_fs = require("fs");
+const m_path = require("path");
+async function main(){
+  /** @type {string} */
+  var pdfPath = m_path.join(__dirname, "_test.pdf");
+  /** @type {string} */
+  var pfxPath = m_path.join(__dirname, "_test.pfx");
+  /** @type {string} */
+  var ps = "";
+  /** @type {string} */
+  var imgPath = m_path.join(__dirname, "_test.png");
+  /** @type {string} */
+  var txt = "I am a test string!";
+  /** @type {string} */
+  var fontPath = m_path.join(__dirname, "_test.ttf");
+
+  if(process.argv.length > 3){
+    pfxPath = process.argv[2];
+    ps = process.argv[3];
+  }else if(process.argv[2]){
+    ps = process.argv[2];
+  }
+
+  if(!ps){
+    // throw new Error("The passphrase is not specified.");
+    pfxPath = "";
+  }
+
+  /** @type {Buffer} */
+  var pdf = m_fs.readFileSync(pdfPath);
+  /** @type {Buffer} */
+  var pfx = null;
+  if(pfxPath){
+    pfx = m_fs.readFileSync(pfxPath);
+  }
+  /** @type {Buffer} */
+  var img = null;
+  /** @type {string} */
+  var imgType = "";
+  if(imgPath){
+    img = m_fs.readFileSync(imgPath);
+    imgType = m_path.extname(imgPath).slice(1);
+  }
+  /** @type {Buffer} */
+  var font = null;
+  if(fontPath){
+    font = m_fs.readFileSync(fontPath);
+  }
+
+  /** @type {SignOption} */
+  var sopt = {
+    p12cert: pfx,
+    pwd: ps,
+    permission: pfx ? 2 : 0,
+    signdate: "1",
+    reason: "I have a test reason.",
+    location: "I am on the earth.",
+    contact: "zga@zga.com",
+    ltv: 1,
+    debug: true,
+  };
+  if(img || txt){
+    sopt.drawinf = {
+      area: {
+        x: 25, // left
+        y: 50, // top
+        w: txt ? undefined : 60,
+        h: txt ? undefined : 100,
+      },
+      pageidx: "2-3", // Placed the signature on the 3rd page and the 4th page. (Indexes of pages start from 0)
+      imgInfo: img ? {
+        imgData: img,
+        imgType: imgType,
+      } : undefined,
+      textInfo: txt ? {
+        text: txt,
+        fontData: font,
+        size: 16,
+      } : undefined,
+    };
+  }
+
+  /** @type {Zga.PdfSigner} */
+  var ser = new Zga.PdfSigner(sopt);
+  /** @type {Uint8Array} */
+  var u8dat = await ser.sign(pdf);
+
+  if(u8dat){
+    /** @type {string} */
+    var outPath = m_path.join(__dirname, "test_signed.pdf");
+    m_fs.writeFileSync(outPath, u8dat);
+    console.log("Output file: " + outPath);
+  }
+
+  console.log("Done");
+}
+```
+
+## Let's protect the pdf
+
+Set password protection to the pdf.
+
+```js
+/**
+ * @param {ArrayBuffer} pdf
+ * @param {string} upwd
+ * @param {string} opwd
+ * @return {Promise<Blob>}
+ */
+async function protect1(pdf, upwd, opwd){
+  /** @type {EncryptOption} */
+  var eopt = {
+    mode: Zga.Crypto.Mode.RC4_40,
+    permissions: ["modify", "annot-forms", "fill-forms", "extract", "assemble"],
+    userpwd: upwd,
+    ownerpwd: opwd,
+  };
+  var cyptor = new Zga.PdfCryptor(eopt);
+  var pdfdoc = await cyptor.encryptPdf(pdf);
+  u8arr = await pdfdoc.save({"useObjectStreams": false});
+  return new Blob([u8arr], {"type" : "application/pdf"});
+}
+```
+
+Set public-key certificate protection to the pdf.
+
+```js
+/**
+ * @param {ArrayBuffer} pdf
+ * @param {ArrayBuffer} cert
+ * @return {Promise<Blob>}
+ */
+async function protect2(pdf, cert){
+  /** @type {EncryptOption} */
+  var eopt = {
+    mode: Zga.Crypto.Mode.AES_128,
+    pubkeys: [{
+      c: cert,
+      p: ["copy", "modify", "copy-extract", "annot-forms", "fill-forms", "extract", "assemble"],
+    }],
+  };
+  var cyptor = new Zga.PdfCryptor(eopt);
+  var pdfdoc = await cyptor.encryptPdf(pdf);
+  u8arr = await pdfdoc.save({"useObjectStreams": false});
+  return new Blob([u8arr], {"type" : "application/pdf"});
+}
+```
+
+Sign and set protection.
+
+```js
+/**
+ * @param {ArrayBuffer} pdf
+ * @param {ArrayBuffer} cert
+ * @param {string} pwd
+ * @param {string} opwd
+ * @return {Promise<Blob>}
+ */
+async function signAndProtect1(pdf, cert, pwd, opwd){
+  /** @type {SignOption} */
+  var sopt = {
+    p12cert: cert,
+    pwd: pwd,
+  };
+  /** @type {EncryptOption} */
+  var eopt = {
+    mode: Zga.Crypto.Mode.RC4_128,
+    permissions: ["modify", "annot-forms", "fill-forms", "extract", "assemble"],
+    ownerpwd: opwd,
+  };
+  var signer = new Zga.PdfSigner(sopt);
+  var u8arr = await signer.sign(pdf, eopt);
+  return new Blob([u8arr], {"type" : "application/pdf"});
+}
+```
+
+Sign and set protection by the same certificate.
+
+```js
+/**
+ * @param {ArrayBuffer} pdf
+ * @param {ArrayBuffer} cert
+ * @param {string} pwd
+ * @return {Promise<Blob>}
+ */
+async function signAndProtect2(pdf, cert, pwd){
+  /** @type {SignOption} */
+  var sopt = {
+    p12cert: cert,
+    pwd: pwd,
+  };
+  /** @type {EncryptOption} */
+  var eopt = {
+    mode: Zga.Crypto.Mode.AES_256,
+    permissions: ["modify", "annot-forms", "fill-forms", "extract", "assemble"],
+    pubkeys: [],
+  };
+  var signer = new Zga.PdfSigner(sopt);
+  var u8arr = await signer.sign(pdf, eopt);
+  return new Blob([u8arr], {"type" : "application/pdf"});
+}
+```
+
+## Thanks
+* The module of setting protection was almost migrated from [TCPDF](http://www.tcpdf.org).

 ## License

--- a/build.sh
+++ b/build.sh
@ -0,0 +1,58 @@
+# !/bin/sh
+# set -x
+
+OUTFLDR=dist
+if [ -d ${OUTFLDR} ]
+then
+	rm -f ${OUTFLDR}/*
+else
+	mkdir ${OUTFLDR}
+fi
+
+VER=$(sed -n -r "s/^.*\"version\": ?\"([0-9.]+)\".*$/\1/p" package.json)
+
+GCCOPT="--charset UTF-8 --compilation_level SIMPLE_OPTIMIZATIONS --warning_level VERBOSE"
+GCCEXT="--externs closure/google-ext.js --externs closure/forge-ext.js --externs closure/pdflib-ext.js --externs closure/zb-externs.js"
+jss=""
+while read js
+do
+	if [ -n "${js}" ]
+	then
+		c=$(echo "${js}" | cut -b1)
+		if [ "$c" != "#" ]
+		then
+			outf="${OUTFLDR}/_${js}"
+			if [ "${js}" = "zgaindex.js" ]
+			then
+				sed -e "s/\/\/Only for nodejs Start\/\//\/*/g" -e "s/\/\/Only for nodejs End\/\//*\//g" -e "s/ver: \"\"/ver: \"${VER}\"/" "lib/${js}" > "${outf}"
+			else
+				sed -e "s/\/\/Only for nodejs Start\/\//\/*/g" -e "s/\/\/Only for nodejs End\/\//*\//g" "lib/${js}" > "${outf}"
+			fi
+			if [ $? -eq 0 ]
+			then
+				echo "Created js file: ${outf}"
+				jss="${jss} --js ${outf}"
+			else
+				echo "Failed create js file: ${outf}"
+				exit 10
+			fi
+		fi
+	fi
+done <<EOF
+zgafetch.js
+zgacertsutil.js
+zgapdfcryptor.js
+zgapdfsigner.js
+zgaindex.js
+EOF
+npx google-closure-compiler ${GCCOPT} ${GCCEXT} ${jss} --js_output_file ${OUTFLDR}/zgapdfsigner.min.js
+if [ $? -eq 0 ]
+then
+	echo "Build result:"
+	ls -l ${OUTFLDR}/*.min.js
+else
+	echo "google-closure-compiler failed."
+	exit 20
+fi
+
+exit 0
--- a/closure/forge-ext.js
+++ b/closure/forge-ext.js
@ -0,0 +1,433 @@
+/** @const */
+var forge = {};
+forge.random = {};
+/**
+ * @param {number} count
+ * @return {string}
+ */
+forge.random.getBytesSync = function(count){};
+
+forge.util = {};
+/** @constructor */
+forge.util.ByteStringBuffer = function(){};
+/**
+ * @return {string}
+ */
+forge.util.ByteStringBuffer.prototype.getBytes = function(){};
+/**
+ * @param {string} value
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.ByteStringBuffer.prototype.putBytes = function(value){};
+/**
+ * @param {number} i
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.ByteStringBuffer.prototype.putInt16 = function(i){};
+/**
+ * @param {number} i
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.ByteStringBuffer.prototype.putInt24Le = function(i){};
+/**
+ * @param {number} i
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.ByteStringBuffer.prototype.putInt32Le = function(i){};
+/**
+ * @param {number} b
+ * @param {number} n
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.ByteStringBuffer.prototype.fillWithByte = function(b, n){};
+/**
+ * @param {number} count
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.ByteStringBuffer.prototype.truncate = function(count){};
+/**
+ * @return {string}
+ */
+forge.util.ByteStringBuffer.prototype.toHex = function(){};
+/** @type {string} */
+forge.util.ByteStringBuffer.prototype.data;
+/**
+ * @param {string} input
+ * @param {string=} encoding
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.util.createBuffer = function(input, encoding){};
+/**
+ * @param {string} hex
+ * @return {string}
+ */
+forge.util.hexToBytes = function(hex){};
+/**
+ * @param {string=} value
+ * @return {string}
+ */
+forge.util.decodeUtf8 = function(value){};
+forge.util.binary = {};
+forge.util.binary.hex = {};
+/**
+ * @param {string} str
+ * @return {Uint8Array}
+ */
+forge.util.binary.hex.decode = function(str){};
+
+/** @constructor */
+forge.asn1 = function(){};
+/**
+ * @typedef
+ * {{
+ *    strict: (boolean|undefined),
+ *    parseAllBytes: (boolean|undefined),
+ *    decodeBitStrings: (boolean|undefined),
+ * }}
+ */
+var DerOption;
+/**
+ * @param {forge.util.ByteStringBuffer|string} bytes
+ * @param {DerOption=} options
+ * @return {forge.asn1}
+ */
+forge.asn1.fromDer = function(bytes, options){};
+/**
+ * @param {forge.asn1} obj
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.asn1.toDer = function(obj){};
+/**
+ * @param {number} num
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.asn1.integerToDer = function(num){};
+/**
+ * @param {string} oid
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.asn1.oidToDer = function(oid){};
+forge.asn1.Type = {};
+/** @type {number} */
+forge.asn1.Type.NONE;
+/** @type {number} */
+forge.asn1.Type.UTF8;
+/** @type {number} */
+forge.asn1.Type.SET;
+/** @type {number} */
+forge.asn1.Type.SEQUENCE;
+/** @type {number} */
+forge.asn1.Type.BOOLEAN;
+/** @type {number} */
+forge.asn1.Type.INTEGER;
+/** @type {number} */
+forge.asn1.Type.OID;
+/** @type {number} */
+forge.asn1.Type.NULL;
+/** @type {number} */
+forge.asn1.Type.OCTETSTRING;
+/** @type {number} */
+forge.asn1.Type.PRINTABLESTRING;
+/** @type {number} */
+forge.asn1.Type.ENUMERATED;
+/** @type {number} */
+forge.asn1.Type.BITSTRING;
+forge.asn1.Class = {};
+/** @type {number} */
+forge.asn1.Class.UNIVERSAL;
+/** @type {number} */
+forge.asn1.Class.CONTEXT_SPECIFIC;
+/**
+ * @param {number} tagClass
+ * @param {number} type
+ * @param {boolean} constructed
+ * @param {Array<forge.asn1>|forge.asn1|number|string} value
+ * @param {Object=} options
+ * @return {forge.asn1}
+ */
+forge.asn1.create = function(tagClass, type, constructed, value, options){};
+/**
+ * @param {forge.asn1} obj
+ * @param {Object<string, *>} v
+ * @param {Object<string, *>} capture
+ * @param {Array<string>} errors
+ */
+forge.asn1.validate = function(obj, v, capture, errors){};
+/** @type {Array<forge.asn1>|string} */
+forge.asn1.prototype.value;
+/** @type {number} */
+forge.asn1.prototype.tagClass;
+/** @type {number} */
+forge.asn1.prototype.type;
+/** @type {boolean} */
+forge.asn1.prototype.constructed;
+
+/** @constructor */
+const forge_BigInteger = function(){};
+/**
+ * @param {forge_BigInteger} a
+ * @return {number}
+ */
+forge_BigInteger.prototype.compareTo = function(a){};
+/** @constructor */
+const forge_cert = function(){};
+/** @type {forge_key} */
+forge_cert.prototype.publicKey;
+/** @type {forge_cert_issuer} */
+forge_cert.prototype.issuer;
+/** @type {string} */
+forge_cert.prototype.serialNumber;
+/** @type {forge_cert_issuer} */
+forge_cert.prototype.subject;
+/**
+ * @param {forge_cert} parent
+ * @return {boolean}
+ */
+forge_cert.prototype.isIssuer = function(parent){};
+/**
+ * @param {string|forge_cert_extension} nm
+ * @return {forge_cert_extension}
+ */
+forge_cert.prototype.getExtension = function(nm){};
+/** @constructor */
+const forge_key = function(){};
+/** @type {forge_BigInteger} */
+forge_key.prototype.n;
+/** @type {forge_BigInteger} */
+forge_key.prototype.e;
+/** @constructor */
+const forge_cert_issuer = function(){};
+/** @type {Array<forge_cert_attr>} */
+forge_cert_issuer.prototype.attributes;
+/**
+ * @param {string} sn
+ * @return {forge.asn1}
+ */
+forge_cert_issuer.prototype.getField = function(sn){};
+/**
+ * @typedef
+ * {{
+ *    id: (string|undefined),
+ *    name: (string|undefined),
+ *    critical: (boolean|undefined),
+ *    value: (string|undefined),
+ *    cA: (boolean|undefined),
+ * }}
+ */
+var forge_cert_extension;
+
+/**
+ * @typedef
+ * {{
+ *    valueTagClass: (number|undefined),
+ *    type: (string|undefined),
+ *    value: (string|undefined),
+ * }}
+ */
+var forge_cert_attr;
+/**
+ * @typedef
+ * {{
+ *    key: (forge_key|undefined),
+ *    certificate: (forge_cert|undefined),
+ *    digestAlgorithm: (string|undefined),
+ *    authenticatedAttributes: (Array<forge_cert_attr>|undefined),
+ *    unauthenticatedAttributes: (Array<forge_cert_attr>|undefined),
+ *    signature: (string|undefined),
+ * }}
+ */
+var forge_signer;
+
+/** @constructor */
+forge.pkcs7 = function(){};
+/**
+ * @return {forge.pkcs7}
+ */
+forge.pkcs7.createSignedData = function(){};
+/**
+ * @return {forge.pkcs7}
+ */
+forge.pkcs7.createEnvelopedData = function(){};
+/**
+ * @param {forge_cert} cert
+ */
+forge.pkcs7.prototype.addCertificate = function(cert){};
+/**
+ * @param {forge_signer} signer
+ */
+forge.pkcs7.prototype.addSigner = function(signer){};
+/** @type {Array<forge_signer>} */
+forge.pkcs7.prototype.signers;
+/** @type {Array<forge.asn1>} */
+forge.pkcs7.prototype.signerInfos;
+/**
+ * @param {forge_cert} cert
+ */
+forge.pkcs7.prototype.addRecipient = function(cert){};
+/** @type {forge.util.ByteStringBuffer} */
+forge.pkcs7.prototype.content;
+/**
+ * @param {forge.util.ByteStringBuffer=} key
+ * @param {string=} cipher
+ */
+forge.pkcs7.prototype.encrypt = function(key, cipher){};
+/**
+ * @typedef
+ * {{
+ *    detached: (boolean|undefined),
+ * }}
+ */
+var forge_sign_option;
+/**
+ * @param {forge_sign_option} options
+ */
+forge.pkcs7.prototype.sign = function(options){};
+/**
+ * @return {forge.asn1}
+ */
+forge.pkcs7.prototype.toAsn1 = function(){};
+
+/** @constructor */
+forge.pkcs12 = function(){};
+/**
+ * @param {forge.asn1} obj
+ * @param {boolean=} strict
+ * @param {string=} password
+ * @return {forge.pkcs12}
+ */
+forge.pkcs12.pkcs12FromAsn1 = function(obj, strict, password){};
+/**
+ * @typedef
+ * {{
+ *    localKeyId: (string|undefined),
+ *    localKeyIdHex: (string|undefined),
+ *    friendlyName: (string|undefined),
+ *    bagType: (string|undefined),
+ * }}
+ */
+var P12BagsFilter;
+/**
+ * @typedef
+ * {{
+ *    cert: forge_cert,
+ *    key: forge_key,
+ * }}
+ */
+var P12Bag;
+/**
+ * @param {P12BagsFilter} filter
+ * @return {Object<string, Object<string|number, P12Bag>>}
+ */
+forge.pkcs12.prototype.getBags = function(filter){};
+
+forge.pki = {};
+forge.pki.oids = {};
+/** @type {string} */
+forge.pki.oids.certBag;
+/** @type {string} */
+forge.pki.oids.pkcs8ShroudedKeyBag;
+/** @type {string} */
+forge.pki.oids.sha1;
+/** @type {string} */
+forge.pki.oids.sha256;
+/** @type {string} */
+forge.pki.oids.contentType;
+/** @type {string} */
+forge.pki.oids.data;
+/** @type {string} */
+forge.pki.oids.messageDigest;
+/** @type {string} */
+forge.pki.oids.signingTime;
+/** @type {string} */
+forge.pki.oids.rsaEncryption;
+/** @type {string} */
+forge.pki.oids.sha256WithRSAEncryption;
+/** @type {string} */
+forge.pki.oids.commonName;
+/** @lends {forge.pki.oids} */
+forge.oids = forge.pki.oids;
+/**
+ * @param {forge.asn1} obj
+ * @param {boolean=} computeHash
+ * @return {forge_cert}
+ */
+forge.pki.certificateFromAsn1 = function(obj, computeHash){};
+/**
+ * @param {forge_cert} cert
+ * @return {forge.asn1}
+ */
+forge.pki.certificateToAsn1 = function(cert){};
+/**
+ * @param {forge_cert_issuer} obj
+ * @return {forge.asn1}
+ */
+forge.pki.distinguishedNameToAsn1 = function(obj){};
+/**
+ * @param {forge_key} key
+ * @return {forge.asn1}
+ */
+forge.pki.publicKeyToRSAPublicKey = function(key){};
+
+forge.md = {};
+/** @constructor */
+forge.md.digest = function(){};
+/**
+ * @param {string=} msg
+ * @param {string=} encoding
+ * @return {forge.md.digest}
+ */
+forge.md.digest.prototype.update = function(msg, encoding){};
+/**
+ * @return {forge.util.ByteStringBuffer}
+ */
+forge.md.digest.prototype.digest = function(){};
+forge.md.md5 = {};
+forge.md.sha1 = {};
+forge.md.sha256 = {};
+/**
+ * @return {forge.md.digest}
+ */
+forge.md.md5.create = function(){};
+/**
+ * @return {forge.md.digest}
+ */
+forge.md.sha1.create = function(){};
+/**
+ * @return {forge.md.digest}
+ */
+forge.md.sha256.create = function(){};
+
+forge.cipher = {};
+/** @constructor */
+forge.cipher.BlockCipher = function(){};
+/**
+ * @typedef
+ * {{
+ *    iv: (string|undefined),
+ *    additionalData: (string|undefined),
+ *    tagLength: (number|undefined),
+ *    tag: (string|undefined),
+ *    output: (forge.util.ByteStringBuffer|undefined),
+ * }}
+ */
+var CipherOptions;
+/**
+ * @param {CipherOptions} options
+ */
+forge.cipher.BlockCipher.prototype.start = function(options){};
+/**
+ * @param {forge.util.ByteStringBuffer} input
+ */
+forge.cipher.BlockCipher.prototype.update = function(input){};
+/**
+ * @return {boolean}
+ */
+forge.cipher.BlockCipher.prototype.finish = function(){};
+/** @type {forge.util.ByteStringBuffer} */
+forge.cipher.BlockCipher.prototype.output;
+/**
+ * @param {string} algorithm
+ * @param {forge.util.ByteStringBuffer} key
+ * @return {forge.cipher.BlockCipher}
+ */
+forge.cipher.createCipher = function(algorithm, key) {};
--- a/closure/google-ext.js
+++ b/closure/google-ext.js
@ -0,0 +1,50 @@
+/**
+ * @typedef
+ * {{
+ *    contentType: (string|undefined),
+ *    headers: (Object<string, *>|undefined),
+ *    method: (string|undefined),
+ *    payload: (string|Uint8Array|undefined),
+ *    useIntranet: (boolean|undefined),
+ *    validateHttpsCertificates: (boolean|undefined),
+ *    followRedirects: (boolean|undefined),
+ *    muteHttpExceptions: (boolean|undefined),
+ *    escaping: (boolean|undefined),
+ * }}
+ */
+var UrlFetchParams;
+
+/**
+ * @constructor
+ */
+function GoogleUrlFetchApp(){}
+/**
+ * @param {string} url
+ * @param {UrlFetchParams} params
+ * @return {HTTPResponse}
+ */
+GoogleUrlFetchApp.prototype.fetch = function(url, params){};
+
+/**
+ * @const {!GoogleUrlFetchApp}
+ */
+var UrlFetchApp;
+
+/**
+ * @constructor
+ */
+function HTTPResponse(){}
+/**
+ * @return {GBlob}
+ */
+HTTPResponse.prototype.getBlob = function(){};
+
+/**
+ * @constructor
+ */
+function GBlob(){}
+/**
+ * @return {Array<number>}
+ */
+GBlob.prototype.getBytes = function(){};
+
--- a/closure/pdflib-ext.js
+++ b/closure/pdflib-ext.js
@ -0,0 +1,673 @@
+/**
+ * @typedef
+ * {{
+ *    ignoreEncryption: (boolean|undefined),
+ *    parseSpeed: (number|undefined),
+ *    throwOnInvalidObject: (boolean|undefined),
+ * }}
+ */
+var PdfLoadOptions;
+
+/** @const */
+var pako = {};
+/**
+ * @param {Uint8Array} input
+ * @return {Uint8Array}
+ */
+pako.inflate = function(input){};
+
+/** @constructor */
+var Fontkit = function(){};
+/** @const {Fontkit} */
+var fontkit;
+
+/** @const */
+var PDFLib = {};
+
+/**
+ * @param {string} str
+ * @param {Array<number>} buffer
+ * @param {number} offset
+ * @return {number}
+ */
+PDFLib.copyStringIntoBuffer = function(str, buffer, offset){};
+/**
+ * @param {string|ArrayBuffer|Uint8Array} input
+ * @return {Uint8Array}
+ */
+PDFLib.toUint8Array = function(input){};
+/**
+ * @param {string} text
+ * @return {string}
+ */
+PDFLib.cleanText = function(text){};
+/**
+ * @param {string} text
+ * @return {Array<string>}
+ */
+PDFLib.lineSplit = function(text){};
+/**
+ * @param {string} text
+ * @return {boolean}
+ */
+PDFLib.isNewlineChar = function(text){};
+/**
+ * @param {string} fntnm
+ * @return {boolean}
+ */
+PDFLib.isStandardFont = function(fntnm){};
+
+/** @constructor */
+PDFLib.PDFDocument = function(){};
+/**
+ * @param {string|Uint8Array|ArrayBuffer} pdf
+ * @param {PdfLoadOptions=} options
+ * @return {PDFLib.PDFDocument}
+ */
+PDFLib.PDFDocument.load = function(pdf, options){};
+/**
+ * @typedef
+ * {{
+ *    useObjectStreams: (boolean|undefined),
+ *    addDefaultPage: (boolean|undefined),
+ *    objectsPerTick: (number|undefined),
+ * }}
+ */
+var PdfSaveOptions;
+/**
+ * @param {PdfSaveOptions} options
+ * @returns {Promise<Uint8Array>}
+ */
+PDFLib.PDFDocument.prototype.save = function(options){};
+/**
+ * @returns {Array<PDFLib.PDFPage>}
+ */
+PDFLib.PDFDocument.prototype.getPages = function(){};
+/**
+ * @returns {number}
+ */
+PDFLib.PDFDocument.prototype.getPageCount = function(){};
+/**
+ * @param {ArrayBuffer|Uint8Array|string} png
+ * @returns {Promise<PDFLib.PDFImage>}
+ */
+PDFLib.PDFDocument.prototype.embedPng = function(png){};
+/**
+ * @param {ArrayBuffer|Uint8Array|string} jpg
+ * @returns {Promise<PDFLib.PDFImage>}
+ */
+PDFLib.PDFDocument.prototype.embedJpg = function(jpg){};
+
+/**
+ * @typedef
+ * {{
+ *    customName: (string|undefined),
+ *    features: (Object<string, boolean>|undefined),
+ *    subset: (boolean|undefined),
+ * }}
+ */
+var EmbedFontOptions;
+/**
+ * @param {ArrayBuffer|Uint8Array} font
+ * @param {EmbedFontOptions=} options
+ * @returns {Promise<PDFLib.PDFFont>}
+ */
+PDFLib.PDFDocument.prototype.embedFont = function(font, options){};
+/**
+ * @param {string} font
+ * @param {string=} customName
+ * @returns {PDFLib.PDFFont}
+ */
+PDFLib.PDFDocument.prototype.embedStandardFont = function(font, customName){};
+/**
+ * @param {Fontkit} fkt
+ */
+PDFLib.PDFDocument.prototype.registerFontkit = function(fkt){};
+/**
+ * @returns {Promise<number>}
+ */
+PDFLib.PDFDocument.prototype.flush = function(){};
+/** @type {PDFLib.PDFCatalog} */
+PDFLib.PDFDocument.prototype.catalog;
+/** @type {PDFLib.PDFContext} */
+PDFLib.PDFDocument.prototype.context;
+
+/** @constructor */
+PDFLib.PDFAcroField = function(){};
+/**
+ * @returns {PDFLib.PDFString|PDFLib.PDFHexString}
+ */
+PDFLib.PDFAcroField.prototype.T = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFAcroField}
+ */
+PDFLib.PDFAcroTerminal = function(){};
+/**
+ * @constructor
+ * @extends {PDFLib.PDFAcroTerminal}
+ */
+PDFLib.PDFAcroSignature = function(){};
+
+/** @constructor */
+PDFLib.PDFAcroForm = function(){};
+/**
+ * @typedef
+ * {{
+ *    0: PDFLib.PDFAcroField,
+ *    1: PDFLib.PDFRef,
+ * }}
+ */
+var PdfFieldInfo;
+/**
+ * @return {Array<PdfFieldInfo>}
+ */
+PDFLib.PDFAcroForm.prototype.getAllFields = function(){};
+/**
+ * @param {PDFLib.PDFRef} field
+ */
+PDFLib.PDFAcroForm.prototype.addField = function(field){};
+/** @type {PDFLib.PDFDict} */
+PDFLib.PDFAcroForm.prototype.dict;
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFDict}
+ */
+PDFLib.PDFCatalog = function(){};
+/**
+ * @param {PDFLib.PDFName} name
+ * @param {PDFLib.PDFObject} object
+ */
+PDFLib.PDFCatalog.prototype.set = function(name, object){};
+/**
+ * @return {PDFLib.PDFDict}
+ */
+PDFLib.PDFCatalog.prototype.AcroForm = function(){};
+/**
+ * @return {PDFLib.PDFAcroForm}
+ */
+PDFLib.PDFCatalog.prototype.getOrCreateAcroForm = function(){};
+
+/** @constructor */
+PDFLib.PDFPage = function(){};
+/** @type {PDFLib.PDFRef} */
+PDFLib.PDFPage.prototype.ref;
+/** @type {PDFLib.PDFPageLeaf} */
+PDFLib.PDFPage.prototype.node;
+/**
+ * @return {PDFLib.Rotation}
+ */
+PDFLib.PDFPage.prototype.getRotation = function(){};
+/**
+ * @typedef
+ * {{
+ *    width: number,
+ *    height: number,
+ * }}
+ */
+var PdfSize;
+/**
+ * @return {PdfSize}
+ */
+PDFLib.PDFPage.prototype.getSize = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFDict}
+ */
+PDFLib.PDFPageLeaf = function(){};
+/**
+ * @param {PDFLib.PDFName} name
+ * @param {PDFLib.PDFObject} object
+ */
+PDFLib.PDFPageLeaf.prototype.set = function(name, object){};
+/**
+ * @return {PDFLib.PDFArray}
+ */
+PDFLib.PDFPageLeaf.prototype.Annots = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFRef = function(){};
+/** @type {number} */
+PDFLib.PDFRef.prototype.objectNumber;
+/** @type {number} */
+PDFLib.PDFRef.prototype.generationNumber;
+/**
+ * @param {number} objectNumber
+ * @param {number=} generationNumber
+ * @return {PDFLib.PDFRef}
+ */
+PDFLib.PDFRef.of = function(objectNumber, generationNumber){};
+
+/**
+ * @constructor
+ */
+PDFLib.PDFContext = function(){};
+/**
+ * @typedef
+ * {{
+ *    0: PDFLib.PDFRef,
+ *    1: PDFLib.PDFObject,
+ * }}
+ */
+var PdfObjEntry;
+/** @return {Array<PdfObjEntry>} */
+PDFLib.PDFContext.prototype.enumerateIndirectObjects = function(){};
+/**
+ * @typedef
+ * {{
+ *    Root: PDFLib.PDFRef,
+ *    Info: PDFLib.PDFRef,
+ *    ID: (PDFLib.PDFArray|undefined),
+ * }}
+ */
+var PdfTrailerInfo;
+/** @type {PdfTrailerInfo} */
+PDFLib.PDFContext.prototype.trailerInfo;
+/**
+ * @param {PDFLib.PDFRef} ref
+ * @param {PDFLib.PDFObject} object
+ */
+PDFLib.PDFContext.prototype.assign = function(ref, object){};
+/**
+ * @param {PDFLib.PDFObject} object
+ * @return {PDFLib.PDFRef}
+ */
+PDFLib.PDFContext.prototype.register = function(object){};
+/**
+ * @return {PDFLib.PDFRef}
+ */
+PDFLib.PDFContext.prototype.nextRef = function(){};
+/**
+ * @param {*} literal
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFContext.prototype.obj = function(literal){};
+/**
+ * @param {string|Uint8Array} contents
+ * @param {PDFLib.PDFDict=} dict
+ * @return {PDFLib.PDFRawStream}
+ */
+PDFLib.PDFContext.prototype.flateStream = function(contents, dict){};
+/**
+ * @param {PDFLib.PDFRef} ref
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFContext.prototype.lookup = function(ref){};
+/**
+ * @param {PDFLib.PDFRef} ref
+ * @param {*} typ
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFContext.prototype.lookupMaybe = function(ref, typ){};
+
+/** @constructor */
+PDFLib.PDFObject = function(){};
+/** @type {Map<PDFLib.PDFRef, PDFLib.PDFObject>} */
+PDFLib.PDFObject.prototype.dict;
+/** @type {Array<PDFLib.PDFName>} */
+PDFLib.PDFObject.prototype.array;
+/**
+ * @param {Array<number>} _buffer
+ * @param {number} _offset
+ * @return {number}
+ */
+PDFLib.PDFObject.prototype.copyBytesInto = function(_buffer, _offset){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFName = function(){};
+/** @type {PDFLib.PDFName} */
+PDFLib.PDFName.Annots;
+/**
+ * @param {string} value
+ * @return {PDFLib.PDFName}
+ */
+PDFLib.PDFName.of = function(value){};
+/** @return {string} */
+PDFLib.PDFName.prototype.asString = function(){};
+/** @type {string} */
+PDFLib.PDFName.prototype.encodedName;
+/** @type {number} */
+PDFLib.PDFName.prototype.numberValue;
+/** @return {string} */
+PDFLib.PDFName.prototype.value = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ * @param {PDFLib.PDFContext} context
+ */
+PDFLib.PDFArray = function(context){};
+/**
+ * @param {PDFLib.PDFObject} object
+ */
+PDFLib.PDFArray.prototype.push = function(object){};
+/**
+ * @param {number} idx
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFArray.prototype.get = function(idx){};
+/**
+ * @return {number}
+ */
+PDFLib.PDFArray.prototype.size = function(){};
+/**
+ * @return {Array<PDFLib.PDFObject>}
+ */
+PDFLib.PDFArray.prototype.asArray = function(){};
+/**
+ * @param {number} idx
+ * @param {*} typ
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFArray.prototype.lookupMaybe = function(idx, typ){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFString = function(){};
+/**
+ * @param {string} value
+ * @return {PDFLib.PDFString}
+ */
+PDFLib.PDFString.of = function(value){};
+/**
+ * @param {Date} value
+ * @return {PDFLib.PDFString}
+ */
+PDFLib.PDFString.fromDate = function(value){};
+/**
+ * @return {string}
+ */
+PDFLib.PDFString.prototype.asString = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFHexString = function(){};
+/**
+ * @param {string} value
+ * @return {PDFLib.PDFHexString}
+ */
+PDFLib.PDFHexString.of = function(value){};
+/**
+ * @param {string} value
+ * @return {PDFLib.PDFHexString}
+ */
+PDFLib.PDFHexString.fromText = function(value){};
+/**
+ * @return {string}
+ */
+PDFLib.PDFHexString.prototype.decodeText = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFNumber = function(){};
+/**
+ * @param {number} value
+ * @return {PDFLib.PDFNumber}
+ */
+PDFLib.PDFNumber.of = function(value){};
+
+/** @constructor */
+PDFLib.PDFImage = function(){};
+/**
+ * @return {PdfSize}
+ */
+PDFLib.PDFImage.prototype.size = function(){};
+/** @type {PDFLib.PDFRef} */
+PDFLib.PDFImage.prototype.ref;
+
+/** @constructor */
+PDFLib.StandardFontEmbedder = function(){};
+/**
+ * @param {string} fontName
+ * @param {string=} customName
+ * @return {PDFLib.StandardFontEmbedder}
+ */
+PDFLib.StandardFontEmbedder.for = function(fontName, customName){};
+
+/** @constructor */
+PDFLib.CustomFontEmbedder = function(){};
+/**
+ * @param {Fontkit} fontkit
+ * @param {Uint8Array} fontData
+ * @param {string=} customName
+ * @return {PDFLib.CustomFontEmbedder}
+ */
+PDFLib.CustomFontEmbedder.for = function(fontkit, fontData, customName){};
+
+/** @constructor */
+PDFLib.PDFFont = function(){};
+/**
+ * @param {PDFLib.PDFRef} ref
+ * @param {PDFLib.PDFDocument} doc
+ * @param {PDFLib.StandardFontEmbedder|PDFLib.CustomFontEmbedder} embedder
+ * @return {PDFLib.PDFFont}
+ */
+PDFLib.PDFFont.of = function(ref, doc, embedder){};
+/** @type {PDFLib.PDFRef} */
+PDFLib.PDFFont.prototype.ref;
+/** @type {string} */
+PDFLib.PDFFont.prototype.name;
+/**
+ * @param {string} text
+ * @return {PDFLib.PDFHexString }
+ */
+PDFLib.PDFFont.prototype.encodeText = function(text){};
+/**
+ * @param {number} size
+ * @param {Object<string, boolean>=} options
+ * @return {number}
+ */
+PDFLib.PDFFont.prototype.heightAtSize = function(size, options){};
+/**
+ * @param {string} text
+ * @param {number} size
+ * @return {number}
+ */
+PDFLib.PDFFont.prototype.widthOfTextAtSize = function(text, size){};
+
+PDFLib.RotationTypes = {};
+/** @type {string} */
+PDFLib.RotationTypes.Degrees;
+/** @constructor */
+PDFLib.Rotation = function(){};
+/** @type {string} */
+PDFLib.Rotation.prototype.type;
+/**
+ * @param {number} d
+ * @return {PDFLib.Rotation}
+ */
+PDFLib.degrees = function(d){};
+/**
+ * @param {PDFLib.Rotation} rot
+ * @return {PDFLib.Rotation}
+ */
+PDFLib.toDegrees = function(rot){};
+
+/** @constructor */
+PDFLib.PDFOperator = function(){};
+/**
+ * @typedef
+ * {{
+ *    x: (number|undefined),
+ *    y: (number|undefined),
+ *    width: (number|undefined),
+ *    height: (number|undefined),
+ *    rotate: (PDFLib.Rotation|undefined),
+ *    xSkew: (PDFLib.Rotation|undefined),
+ *    ySkew: (PDFLib.Rotation|undefined),
+ *    graphicsState: (string|undefined),
+ * }}
+ */
+var PdfDrawimgOption;
+/**
+ * @param {string} name
+ * @param {PdfDrawimgOption} options
+ * @return {Array<PDFLib.PDFOperator>}
+ */
+PDFLib.drawImage = function(name, options){};
+/**
+ * @constructor
+ */
+PDFLib.Color = function(){};
+/**
+ * @typedef
+ * {{
+ *    color: PDFLib.Color,
+ *    font: string,
+ *    graphicsState: (string|undefined),
+ *    lineHeight: number,
+ *    size: number,
+ *    rotate: (PDFLib.Rotation|undefined),
+ *    xSkew: (PDFLib.Rotation|undefined),
+ *    ySkew: (PDFLib.Rotation|undefined),
+ *    x: number,
+ *    y: number,
+ * }}
+ */
+var DrawLinesOfTextOptions;
+/**
+ * @param {Array<PDFLib.PDFHexString>} lines
+ * @param {DrawLinesOfTextOptions} options
+ * @return {Array<PDFLib.PDFOperator>}
+ */
+PDFLib.drawLinesOfText = function(lines, options){};
+/**
+ * @param {number} red
+ * @param {number} green
+ * @param {number} blue
+ * @return {PDFLib.Color}
+ */
+PDFLib.rgb = function(red, green, blue){};
+
+/**
+ * @constructor
+ */
+PDFLib.Cache = function(){};
+/**
+ * @return {Uint8Array}
+ */
+PDFLib.Cache.prototype.access = function(){};
+/** @type {Uint8Array} */
+PDFLib.Cache.prototype.value;
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFStream = function(){};
+/**
+ * @constructor
+ * @extends {PDFLib.PDFStream}
+ */
+PDFLib.PDFFlateStream = function(){};
+/** @type {PDFLib.Cache} */
+PDFLib.PDFFlateStream.prototype.contentsCache;
+/**
+ * @constructor
+ * @extends {PDFLib.PDFFlateStream}
+ */
+PDFLib.PDFContentStream = function(){};
+/**
+ * @param {PDFLib.PDFDict} dict
+ * @param {Array<PDFLib.PDFOperator>} operators
+ * @param {boolean=} encode
+ * @return {PDFLib.PDFContentStream}
+ */
+PDFLib.PDFContentStream.of = function(dict, operators, encode){};
+/**
+ * @constructor
+ * @extends {PDFLib.PDFStream}
+ */
+PDFLib.PDFRawStream = function(){};
+/** @type {PDFLib.PDFDict} */
+PDFLib.PDFRawStream.prototype.dict;
+/**
+ * @return {Uint8Array}
+ */
+PDFLib.PDFRawStream.prototype.getContents = function(){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFCrossRefSection = function(){};
+/**
+ * @return {PDFLib.PDFCrossRefSection}
+ */
+PDFLib.PDFCrossRefSection.create = function(){};
+/**
+ * @param {PDFLib.PDFRef} ref
+ * @param {number} offset
+ */
+PDFLib.PDFCrossRefSection.prototype.addEntry = function (ref, offset){};
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFDict = function(){};
+/**
+ * @param {PDFLib.PDFName} key
+ * @param {PDFLib.PDFObject} value
+ */
+PDFLib.PDFDict.prototype.set = function(key, value){};
+/**
+ * @param {PDFLib.PDFName} key
+ * @param {*} typ
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFDict.prototype.lookupMaybe = function(key, typ){};
+/**
+ * @param {PDFLib.PDFName} key
+ * @return {PDFLib.PDFObject}
+ */
+PDFLib.PDFDict.prototype.lookup = function(key){};
+
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFWriter = function(){};
+/**
+ * @param {PDFLib.PDFContext} context
+ * @param {number} objectsPerTick
+ * @return {PDFLib.PDFWriter}
+ */
+PDFLib.PDFWriter.forContext = function(context, objectsPerTick){};
+/**
+ * @return {PDFLib.PDFDict}
+ */
+PDFLib.PDFWriter.prototype.createTrailerDict = function(){};
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFTrailerDict = function(){};
+/**
+ * @param {PDFLib.PDFDict} dict
+ * @return {PDFLib.PDFTrailerDict}
+ */
+PDFLib.PDFTrailerDict.of = function(dict){};
+/**
+ * @constructor
+ * @extends {PDFLib.PDFObject}
+ */
+PDFLib.PDFTrailer = function(){};
+/**
+ * @param {number} offset
+ * @return {PDFLib.PDFTrailer}
+ */
+PDFLib.PDFTrailer.forLastCrossRefSectionOffset = function(offset){};
--- a/closure/zb-externs.js
+++ b/closure/zb-externs.js
@ -1,39 +1,287 @@
+/**
+ * @typedef
+ * {{
+ *    url: string,
+ *    len: (number|undefined),
+ *    headers: (Object<string, *>|undefined),
+ * }}
+ */
+var TsaServiceInfo;
 /**
 * the base point of x, y is top left corner.
+ * wDraw, hDraw: Only for internal process.
 * @typedef
 * {{
 *    x: number,
 *    y: number,
- *    w: number,
- *    h: number,
+ *    w: (number|undefined),
+ *    h: (number|undefined),
+ *    wDraw: (number|undefined),
+ *    hDraw: (number|undefined),
 * }}
 */
 var SignAreaInfo;
 /**
+ * fontData:   default: StandardFonts.Helvetica
+ * color:      A Hex string of color. default: #000
+ * opacity:    valid value is from 0 to 1. default: 1 // Not implemented
+ * blendMode:  https://pdf-lib.js.org/docs/api/enums/blendmode // Not implemented
+ * lineHeight: default is the height of the font at the given size
+ * xOffset:    An offset from SignAreaInfo's x
+ * yOffset:    An offset from SignAreaInfo's y
+ * align:      Text alignment: 0 left, 1 center, 2 right. default: 0
+ * noBreaks:   A regular expression string that indicates which characters should not be used to break a word. default: [A-Za-z0-9]
+ *
+ * @typedef
+ * {{
+ *    text: string,
+ *    fontData: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
+ *    subset: (boolean|undefined),
+ *    color: (string|undefined),
+ *    opacity: (number|undefined),
+ *    blendMode: (string|undefined),
+ *    lineHeight: (number|undefined),
+ *    size: number,
+ *    xOffset: (number|undefined),
+ *    yOffset: (number|undefined),
+ *    wMax: (number|undefined),
+ *    align: (number|undefined),
+ *    noBreaks: (string|undefined),
+ * }}
+ */
+var SignTextInfo;
+/**
+ * opacity:    valid value is from 0 to 1. default: 1 // Not implemented
+ * blendMode:  https://pdf-lib.js.org/docs/api/enums/blendmode // Not implemented
+ *
+ * @typedef
+ * {{
+ *    imgData: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
+ *    imgType: (string|undefined),
+ *    opacity: (number|undefined),
+ *    blendMode: (string|undefined),
+ * }}
+ */
+var SignImageInfo;
+/**
+ * The signature can be placed in the same position on multiple pages, but all pages must have the same size and rotation angle.
+ * pageidx: Can be a string to indicate placing the signature on multiple pages.
+ *   For example: A pdf contains 17 pages and specify "-3,5-7,9,12,15-" means [0,1,2,3,5,6,7,9,12,15,16]
+ * imgData, imgType: Deprecated, use imgInfo instead.
+ * img, font: Only for internal process.
+ *
 * @typedef
 * {{
 *    area: SignAreaInfo,
- *    pageidx: (number|undefined),
- *    imgData: (Uint8Array|ArrayBuffer|string|undefined),
+ *    pageidx: (number|string|undefined),
+ *    imgData: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
 *    imgType: (string|undefined),
- *    text: (string|undefined),
- *    fontData: (PDFLib.StandardFonts|Uint8Array|ArrayBuffer|string|undefined),
+ *    imgInfo: (SignImageInfo|undefined),
+ *    textInfo: (SignTextInfo|undefined),
 *    img: (PDFLib.PDFImage|undefined),
 *    font: (PDFLib.PDFFont|undefined),
 * }}
 */
 var SignDrawInfo;
 /**
+ * In the case of adding a document timestamp, the p12cert and pwd must be omitted. But meanwhile the tsa must be provided.
+ * 
+ * permission: (DocMDP) The modification permissions granted for this document. Valid values are:
+ *  1 : No changes to the document are permitted; any change to the document invalidates the signature.
+ *  2 : Permitted changes are filling in forms, instantiating page templates, and signing; other changes invalidate the signature.
+ *  3 : Permitted changes are the same as for 2, as well as annotation creation, deletion, and modification; other changes invalidate the signature.
+ *
+ * ltv: Type of Long-Term Validation. Valid values are:
+ *  1 : auto; Try using ocsp only to enable the LTV first; If can't, try using crl to enable the LTV.
+ *  2 : crl only; Only try using crl to enable the LTV.
+ *
 * @typedef
 * {{
- *    p12cert: (Uint8Array|ArrayBuffer|string),
- *    pwd: string,
+ *    p12cert: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
+ *    pwd: (string|undefined),
+ *    permission: (number|undefined),
 *    reason: (string|undefined),
 *    location: (string|undefined),
 *    contact: (string|undefined),
- *    signdate: (Date|undefined),
+ *    signdate: (Date|TsaServiceInfo|string|undefined),
 *    signame: (string|undefined),
 *    drawinf: (SignDrawInfo|undefined),
+ *    ltv: (number|undefined),
+ *    debug: (boolean|undefined),
 * }}
 */
 var SignOption;
+
+/**
+ * @typedef
+ * {{
+ *    c: (Array<number>|Uint8Array|ArrayBuffer|string|forge_cert|undefined),
+ *    p: (Array<string>|undefined),
+ * }}
+ */
+var PubKeyInfo;
+/**
+ * permissions: The set of permissions (specify the ones you want to block):
+ *  copy : (Only valid on public-key mode) Copy text and graphics from the document;
+ *  print : Print the document;
+ *  modify : Modify the contents of the document by operations other than those controlled by 'fill-forms', 'extract' and 'assemble';
+ *  copy-extract : Copy or otherwise extract text and graphics from the document;
+ *  annot-forms : Add or modify text annotations, fill in interactive form fields, and, if 'modify' is also set, create or modify interactive form fields (including signature fields);
+ *  fill-forms : Fill in existing interactive form fields (including signature fields), even if 'annot-forms' is not specified;
+ *  extract : Extract text and graphics (in support of accessibility to users with disabilities or for other purposes);
+ *  assemble : Assemble the document (insert, rotate, or delete pages and create bookmarks or thumbnail images), even if 'modify' is not set;
+ *  print-high : Print the document to a representation from which a faithful digital copy of the PDF content could be generated. When this is not set, printing is limited to a low-level representation of the appearance, possibly of degraded quality.
+ *
+ * ownerpwd: Owner password If not specified, a random value is used.
+ *
+ * pubkeys: Array of recipients containing public-key certificates ('c') and permissions ('p'). If want to encrypt the pdf by the certificate of signing, just apply a PubKeyInfo without c.
+ *
+ * @typedef
+ * {{
+ *    mode: Zga.Crypto.Mode,
+ *    permissions: (Array<string>|undefined),
+ *    userpwd: (string|undefined),
+ *    ownerpwd: (string|undefined),
+ *    pubkeys: (Array<PubKeyInfo>|undefined),
+ * }}
+ */
+var EncryptOption;
+/**
+ * @typedef
+ * {{
+ *    CFM: string,
+ *    Length: (number|undefined),
+ *    EncryptMetadata: (boolean|undefined),
+ *    AuthEvent: (string|undefined),
+ * }}
+ */
+var CFType;
+/**
+ * enckey: Last RC4 key encrypted.
+ * enckeyc: Last RC4 computed key.
+ * @typedef
+ * {{
+ *    enckey: string,
+ *    enckeyc: Array<number>,
+ * }}
+ */
+var RC4LastInfo;
+/**
+ * @typedef
+ * {{
+ *    certs: (Array<forge_cert>|undefined),
+ *    ocsps: (Array<Uint8Array>|undefined),
+ *    crls: (Array<Uint8Array>|undefined),
+ * }}
+ */
+var DSSInfo;
+/**
+ * @typedef
+ * {{
+ *    resp: (Uint8Array|undefined),
+ *    cchainIdx: (number|undefined),
+ * }}
+ */
+var OcspData;
+
+var Zga = {};
+/**
+ * @param {Uint8Array} uarr
+ * @return {string}
+ */
+Zga.u8arrToRaw = function(uarr){};
+/**
+ * @param {string} raw
+ * @return {Uint8Array}
+ */
+Zga.rawToU8arr = function(raw){};
+
+Zga.Crypto = {};
+/** @enum {number} */
+Zga.Crypto.Mode = {
+	RC4_40: 0,
+	RC4_128: 1,
+	AES_128: 2,
+	AES_256: 3,
+};
+/**
+ * @constructor
+ * @param {EncryptOption} encopt
+ */
+Zga.PdfCryptor = function(encopt){};
+/**
+ * @param {PDFLib.PDFDocument|Array<number>|Uint8Array|ArrayBuffer|string} pdf
+ * @param {PDFLib.PDFRef=} ref
+ * @return {Promise<PDFLib.PDFDocument>}
+ */
+Zga.PdfCryptor.prototype.encryptPdf = function(pdf, ref){};
+/**
+ * @param {number} num
+ * @param {PDFLib.PDFObject} val
+ */
+Zga.PdfCryptor.prototype.encryptObject = function(num, val){};
+/**
+ * @constructor
+ * @param {Array<forge_cert|forge.asn1|string>=} certs
+ */
+Zga.CertsChain = function(certs){};
+/**
+ * @return {forge_cert}
+ */
+Zga.CertsChain.prototype.getSignCert = function(){};
+/**
+ * @public
+ * @return {boolean}
+ */
+Zga.CertsChain.prototype.isSelfSignedCert = function(){};
+/**
+ * @return {Array<forge_cert>}
+ */
+Zga.CertsChain.prototype.getAllCerts = function(){};
+/**
+ * @public
+ * @param {forge_cert} cert
+ * @return {Promise<boolean>}
+ */
+Zga.CertsChain.prototype.buildChain = function(cert){};
+/**
+ * @param {boolean=} crlOnly
+ * @return {Promise<DSSInfo>}
+ */
+Zga.CertsChain.prototype.prepareDSSInf = function(crlOnly){};
+/**
+ * @constructor
+ * @param {TsaServiceInfo} inf
+ */
+Zga.TsaFetcher = function(inf){};
+/** @type {string} */
+Zga.TsaFetcher.prototype.url;
+/** @type {number} */
+Zga.TsaFetcher.prototype.len;
+/**
+ * @param {string=} data
+ * @return {Promise<string>}
+ */
+Zga.TsaFetcher.prototype.queryTsa = function(data){};
+/**
+ * @param {boolean=} forP7
+ * @return {forge.asn1}
+ */
+Zga.TsaFetcher.prototype.getToken = function(forP7){};
+/**
+ * @return {Zga.CertsChain}
+ */
+Zga.TsaFetcher.prototype.getCertsChain = function(){};
+
+/**
+ * @constructor
+ * @param {SignOption} signopt
+ */
+Zga.PdfSigner = function(signopt){};
+/**
+ * @public
+ * @param {PDFLib.PDFDocument|Array<number>|Uint8Array|ArrayBuffer|string} pdf
+ * @param {EncryptOption=} cypopt
+ * @return {Promise<Uint8Array>}
+ */
+Zga.PdfSigner.prototype.sign = function(pdf, cypopt){};
--- a/lib/zgacertsutil.js
+++ b/lib/zgacertsutil.js
--- a/lib/zgafetch.js
+++ b/lib/zgafetch.js
@ -0,0 +1,140 @@
+/**
+ * @param {Object<string, *>} z
+ */
+function supplyZgaUrlFetch(z){
+
+//Only for nodejs Start//
+const m_urlparser = require("url");
+const m_h = {
+	"http:": require('follow-redirects').http,
+	"https:": require('follow-redirects').https,
+};
+// @type {boolean}
+z.isNode = function(){return this === globalThis.global;}();
+//Only for nodejs End//
+
+/** @type {boolean} */
+z.isBrowser = function(){return this === globalThis.self;}();
+
+/**
+ * @param {string} url
+ * @param {UrlFetchParams} params
+ * @return {Promise<Uint8Array>}
+ */
+z.urlFetch = function(url, params){
+
+//Only for nodejs Start//
+	if(z.isNode){
+		return new Promise(function(resolve, reject){
+			// @type {URL}
+			var opts = m_urlparser.parse(url);
+			var http = m_h[opts.protocol];
+			// @type {string|Buffer}
+			var dat = null;
+			var encoding = undefined;
+			opts.method = "GET";
+			if(params){
+				if(params.payload instanceof Buffer){
+					dat = params.payload;
+				}else if(params.payload instanceof Uint8Array){
+					dat = Buffer.from(params.payload.buffer);
+				}else if(params.payload instanceof ArrayBuffer){
+					dat = Buffer.from(params.payload);
+				}else{
+					dat = params.payload;
+					encoding = "binary";
+				}
+				if(params.headers){
+					opts.headers = params.headers;
+				}
+				if(params.method){
+					opts.method = params.method;
+				}
+				if(params.validateHttpsCertificates === false){
+					opts.rejectUnauthorized = false;
+				}
+			}
+
+			// @type {http.ClientRequest}
+			var hreq = http.request(opts, function(a_res){ // @type {http.IncomingMessage} a_res
+				if(a_res.statusCode !== 200){
+					var a_err = new Error("Failed to request url. " + url +  "\n Status Code: " + a_res.statusCode);
+					a_res.resume();
+					throw a_err;
+				}
+				// @type {Array<Buffer>}
+				var a_bufs = [];
+				var a_bufs_len = 0;
+				a_res.on("data", function(b_chunk){ // @type {Buffer} b_chunk
+					a_bufs.push(b_chunk);
+					a_bufs_len += b_chunk.length;
+				});
+				a_res.on("end", function(){
+					// @type {Buffer}
+					var b_bdat = Buffer.concat(a_bufs, a_bufs_len);
+					resolve(b_bdat);
+				});
+			});
+			hreq.on("error", function(a_err){
+				throw a_err;
+			});
+			hreq.end(dat, encoding);
+		});
+	}
+//Only for nodejs End//
+
+	// Google Apps Script
+	if(globalThis.UrlFetchApp){
+		return new Promise(function(resolve){
+			/** @type {GBlob} */
+			var tblob = UrlFetchApp.fetch(url, params).getBlob();
+			resolve(new Uint8Array(tblob.getBytes()));
+		});
+	}
+
+	// browser
+	if(z.isBrowser && globalThis.self.fetch){
+		/**
+		 * @return {Promise<Uint8Array>}
+		 */
+		var func = async function(){
+			/** @type {!RequestInit} */
+			var reqinf = {
+				method: "GET",
+				redirect: "follow",
+			};
+			if(params){
+				if(params.payload){
+					reqinf.body = params.payload;
+				}
+				if(params.headers){
+					reqinf.headers = params.headers;
+				}
+				if(params.method){
+					reqinf.method = params.method;
+				}
+			}
+			/** @type {Response} */
+			var resp = await fetch(url, reqinf);
+			if(resp.ok){
+				/** @type {ArrayBuffer} */
+				var abdat = await resp.arrayBuffer();
+				return new Uint8Array(abdat);
+			}else{
+				/** @type {string} */
+				var msg = await resp.text();
+				throw new Error("Fetch failed." + resp.status + ": " + msg);
+			}
+		};
+		return func();
+	}
+	return null;
+};
+
+}
+
+//Only for nodejs Start//
+if(typeof exports === "object" && typeof module !== "undefined"){
+	module.exports = supplyZgaUrlFetch;
+}
+//Only for nodejs End//
--- a/lib/zgaindex.js
+++ b/lib/zgaindex.js
@ -0,0 +1,64 @@
+'use strict';
+
+/**
+ * @return {Object<string, *>}
+ */
+function genZga(){
+	/** @const {Object<string, *>} */
+	const z = {
+		ver: "",
+	};
+
+	/**
+	 * @param {...string} msg
+	 */
+	z.log = function(...msg){
+		if(z.debug){
+			console.log(...msg);
+		}
+	};
+
+	/**
+	 * @param {Uint8Array} uarr
+	 * @return {string}
+	 */
+	z.u8arrToRaw = function(uarr){
+		/** @type {Array<string>} */
+		var arr = [];
+		for(var i=0; i<uarr.length; i++){
+			arr.push(String.fromCharCode(uarr[i]));
+		}
+		return arr.join("");
+	};
+
+	/**
+	 * @param {string} raw
+	 * @return {Uint8Array}
+	 */
+	z.rawToU8arr = function(raw){
+		/** @type {Uint8Array} */
+		var arr = new Uint8Array(raw.length);
+		for(var i=0; i<raw.length; i++){
+			arr[i] = raw.charCodeAt(i);
+		}
+		return arr;
+	};
+
+	return z;
+}
+
+//Only for nodejs Start//
+if(typeof exports === "object" && typeof module !== "undefined"){
+	module.exports = genZga();
+}else{
+//Only for nodejs End//
+	if(!globalThis.Zga){
+		globalThis.Zga = genZga();
+		supplyZgaUrlFetch(globalThis.Zga);
+		supplyZgaCertsChain(globalThis.Zga);
+		supplyZgaCryptor(globalThis.Zga);
+		supplyZgaSigner(globalThis.Zga);
+	}
+//Only for nodejs Start//
+}
+//Only for nodejs End//
--- a/lib/zganode.d.ts
+++ b/lib/zganode.d.ts
@ -0,0 +1,117 @@
+import * as forge from "node-forge";
+import * as PDFLib from "pdf-lib";
+export * as forge from "node-forge";
+export * as PDFLib from "pdf-lib";
+
+export declare function u8arrToRaw(uarr: Uint8Array): string;
+export declare function rawToU8arr(raw: string): Uint8Array;
+export declare namespace Crypto {
+  enum Mode {
+    RC4_40,
+    RC4_128,
+    AES_128,
+    AES_256,
+  }
+}
+export type DSSInfo = {
+  certs?: Array<forge.pki.Certificate>;
+  ocsps?: Array<Uint8Array>;
+  crls?: Array<Uint8Array>;
+};
+export type EncryptOption = {
+  mode: Crypto.Mode;
+  permissions?: Array<string>;
+  userpwd?: string;
+  ownerpwd?: string;
+  pubkeys?: Array<PubKeyInfo>;
+};
+export type PubKeyInfo = {
+  c?: Array<number> | Uint8Array | ArrayBuffer | string | forge.pki.Certificate;
+  p?: Array<string>;
+};
+export type SignAreaInfo = {
+  x: number;
+  y: number;
+  w?: number;
+  h?: number;
+};
+export type SignTextInfo = {
+  text: string,
+  fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts;
+  subset?: boolean;
+  color?: string;
+  opacity?: number;
+  blendMode?: string;
+  lineHeight?: number;
+  size: number,
+  xOffset?: number;
+  yOffset?: number;
+  wMax?: number;
+  align?: number;
+  noBreaks?: string;
+};
+export type SignImageInfo = {
+  imgData: Array<number> | Uint8Array | ArrayBuffer | string;
+  imgType: string;
+  opacity?: number;
+  blendMode?: string;
+};
+export type SignDrawInfo = {
+  area: SignAreaInfo;
+  pageidx?: number | string;
+  /** @deprecated use imgInfo instead */
+  imgData?: Array<number> | Uint8Array | ArrayBuffer | string;
+  /** @deprecated use imgInfo instead */
+  imgType?: string;
+  imgInfo?: SignImageInfo;
+  textInfo?: SignTextInfo;
+};
+export type SignOption = {
+  p12cert?: Array<number> | Uint8Array | ArrayBuffer | string;
+  pwd?: string;
+  permission?: number;
+  reason?: string;
+  location?: string;
+  contact?: string;
+  signdate?: Date | TsaServiceInfo | string;
+  signame?: string;
+  drawinf?: SignDrawInfo;
+  ltv?: number;
+  debug?: boolean;
+};
+export type TsaServiceInfo = {
+  url: string;
+  len?: number;
+  headers?: Record<string, any>;
+};
+
+export declare class CertsChain {
+  constructor(certs?: Array<forge.pki.Certificate | forge.asn1.Asn1 | string>);
+  buildChain(cert: forge.pki.Certificate): Promise<boolean>;
+  getAllCerts(): Array<forge.pki.Certificate>;
+  getSignCert(): forge.pki.Certificate;
+  isSelfSignedCert(): boolean;
+  prepareDSSInf(crlOnly?: boolean): Promise<DSSInfo>;
+}
+export declare class PdfCryptor {
+  constructor(encopt: EncryptOption);
+  encryptPdf(pdf: PDFLib.PDFDocument | Array<number> | Uint8Array | ArrayBuffer | string, ref?: PDFLib.PDFRef): Promise<PDFLib.PDFDocument>;
+  encryptObject(num: number, val: PDFLib.PDFObject): void;
+}
+export declare class PdfSigner {
+  constructor(signopt: SignOption);
+  sign(pdf: PDFLib.PDFDocument | Array<number> | Uint8Array | ArrayBuffer | string, cypopt?: EncryptOption): Promise<Uint8Array>;
+}
+export declare class TsaFetcher {
+  constructor(inf: TsaServiceInfo);
+  url: string;
+  len: number;
+  getCertsChain(): CertsChain;
+  getToken(forP7?: boolean): forge.asn1.Asn1;
+  queryTsa(data?: string): Promise<string>;
+}
+export declare class PdfFonts {
+  private constructor();
+  static from(pdfdoc: PDFLib.PDFDocument): Promise<PdfFonts>;
+  getEmbeddedFont(fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts, subset?: boolean): Promise<PDFLib.PDFFont>;
+}
--- a/lib/zganode.js
+++ b/lib/zganode.js
@ -0,0 +1,17 @@
+const m_urlparser = require("url");
+const m_h = {
+	"http:": require('follow-redirects').http,
+	"https:": require('follow-redirects').https,
+};
+const z = require("./zgaindex.js");
+z.forge = require("node-forge");
+z.PDFLib = require("pdf-lib");
+// z.fontkit = require("@pdf-lib/fontkit");
+z.fontkit = require("pdf-fontkit");
+z.pako = require("pako");
+
+require("./zgafetch.js")(z);
+require("./zgacertsutil.js")(z);
+require("./zgapdfcryptor.js")(z);
+require("./zgapdfsigner.js")(z);
+module.exports = z;
--- a/lib/zgapdfcryptor.js
+++ b/lib/zgapdfcryptor.js
@ -0,0 +1,968 @@
+'use strict';
+
+// This module was migrated from [TCPDF](http://www.tcpdf.org)
+/**
+ * @param {Object<string, *>} z
+ */
+function supplyZgaCryptor(z){
+
+//Only for nodejs Start//
+if(z.forge){
+	var forge = z.forge;
+}
+if(z.PDFLib){
+	var PDFLib = z.PDFLib;
+}
+//Only for nodejs End//
+
+/**
+ * @param {PDFLib.PDFDocument|Array<number>|Uint8Array|ArrayBuffer|string} pdf
+ * @return {Promise<PDFLib.PDFDocument>}
+ */
+z.loadPdf = async function(pdf){
+	/** @type {PDFLib.PDFDocument} */
+	var pdfdoc = null;
+	if(pdf.addPage){
+		pdfdoc = /** @type {PDFLib.PDFDocument} */(pdf);
+	}else if(Array.isArray(pdf)){
+		pdfdoc = await PDFLib.PDFDocument.load(new Uint8Array(pdf));
+	}else{
+		pdfdoc = await PDFLib.PDFDocument.load(/** @type {(ArrayBuffer|Uint8Array|string)} */(pdf));
+	}
+	return pdfdoc;
+};
+
+z.Crypto = {
+	/**
+	 * @enum {number}
+	 */
+	Mode: {
+		RC4_40: 0,
+		RC4_128: 1,
+		AES_128: 2,
+		AES_256: 3,
+	},
+
+	/**
+	 * @enum {number}
+	 */
+	Permission: {
+//		"owner": 2, // bit 2 -- inverted logic: cleared by default
+		"copy": 2, // bit 2 -- Only valid on public-key mode
+		"print": 4, // bit 3
+		"modify": 8, // bit 4
+		"copy-extract": 16, // bit 5
+		"annot-forms": 32, // bit 6
+		"fill-forms": 256, // bit 9
+		"extract": 512, // bit 10
+		"assemble": 1024,// bit 11 -- On public-key mode, it means adding, deleting or rotating pages.
+		"print-high": 2048 // bit 12
+	},
+
+	/** @type {string} */
+	EncPadding: "\x28\xBF\x4E\x5E\x4E\x75\x8A\x41\x64\x00\x4E\x56\xFF\xFA\x01\x08\x2E\x2E\x00\xB6\xD0\x68\x3E\x80\x2F\x0C\xA9\xFE\x64\x53\x69\x7A",
+
+	/**
+	 * Add "\" before "\", "(" and ")", and chr(13) => '\r'
+	 * @param {string} s string to escape.
+	 * @return {string} escaped string.
+	 */
+	_escape: function(s){
+		if(!s){
+			return s;
+		}
+		/** @const {Array<string>} */
+		const CHARS = "\\()".split("");
+		/** @type {Array<string>} */
+		var arr = [];
+		for(var i=0; i<s.length; i++){
+			/** @type {string} */
+			var c = s.charAt(i);
+			if(c == "\r"){
+				arr.push("\\r");
+			}else{
+				if(CHARS.indexOf(c) >= 0){
+					arr.push("\\");
+				}
+				arr.push(c);
+			}
+		}
+		return arr.join("");
+	},
+
+	/**
+	 * Returns a string containing random data to be used as a seed for encryption methods.
+	 * @param {string=} seed starting seed value
+	 * @return {string} containing random data
+	 */
+	getRandomSeed: function(seed){
+		/** @type {string} */
+		var ret = forge.random.getBytesSync(256);
+		if(seed){
+			ret += seed;
+		}
+		ret += new Date().getTime();
+		return ret;
+	},
+
+	/**
+	 * Returns the input text encrypted using RC4 algorithm and the specified key.
+	 * RC4 is the standard encryption algorithm used in PDF format
+	 * @param {string} key Encryption key.
+	 * @param {string} txt Input text to be encrypted.
+	 * @param {RC4LastInfo} lastinf Last RC4 information.
+	 * @return {string} encrypted text
+	 */
+	_RC4: function(key, txt, lastinf){
+		/** @type {Array<number>} */
+		var rc4 = null;
+		/** @type {number} */
+		var i = 0;
+		/** @type {number} */
+		var j = 0;
+		/** @type {number} */
+		var t = 0;
+		if(lastinf.enckey != key){
+			/** @type {string} */
+			var k = key.repeat(256 / key.length + 1);
+			rc4 = new Array(256);
+			// Initialize rc4
+			for(i=0; i<rc4.length; i++){
+				rc4[i] = i;
+			}
+			for(i=0; i<rc4.length; i++){
+				t = rc4[i];
+				j = (j + t + k.charCodeAt(i)) & 0xFF;
+				rc4[i] = rc4[j];
+				rc4[j] = t;
+			}
+			lastinf.enckey = key;
+			lastinf.enckeyc = [].concat(rc4);
+		}else{
+			rc4 = [].concat(lastinf.enckeyc);
+		}
+		/** @type {number} */
+		var len = txt.length;
+		/** @type {number} */
+		var a = 0;
+		/** @type {number} */
+		var b = 0;
+		/** @type {string} */
+		var out = "";
+		for(i=0; i<len; i++){
+			a = (a + 1) & 0xFF;
+			t = rc4[a];
+			b = (b + t) & 0xFF;
+			rc4[a] = rc4[b];
+			rc4[b] = t;
+			k = rc4[(rc4[a] + rc4[b]) & 0xFF];
+			out += String.fromCharCode(txt.charCodeAt(i) ^ k);
+		}
+		return out;
+	},
+
+	/**
+	 * Return the permission code used on encryption (P value).
+	 *
+	 * @param {Array<string>=} permissions the set of permissions (specify the ones you want to block).
+	 * @param {z.Crypto.Mode=} mode
+	 * @return {number}
+	 */
+	getUserPermissionCode: function(permissions, mode){
+		/** @type {number} */
+		var protection = 2147422012; // 32 bit: (01111111 11111111 00001111 00111100)
+		if(permissions){
+			permissions.forEach(function(a_itm){
+				/** @type {number} */
+				var a_p = z.Crypto.Permission[a_itm];
+				if(a_p && a_itm != "copy"){
+					if(mode > 0 || a_p <= 32){
+						// set only valid permissions
+						if(a_p == 2){
+							// the logic for bit 2 is inverted (cleared by default)
+							protection += a_p;
+						}else{
+							protection -= a_p;
+						}
+					}
+				}
+			});
+		}
+		return protection;
+	},
+
+	/**
+	 * Convert encryption P value to a string of bytes, low-order byte first.
+	 * @param {number} protection 32bit encryption permission value (P value)
+	 * @return {string}
+	 */
+	getUserPermissionsString: function(protection){
+		/** @type {forge.util.ByteStringBuffer} */
+		var buff = new forge.util.ByteStringBuffer();
+		buff.putInt32Le(protection);
+		return buff.getBytes();
+	},
+
+	/**
+	 * Return a string of permissions, high-order byte first.
+	 * @param {Array<string>=} permissions the set of permissions (specify the ones you want to block).
+	 * @return {string}
+	 */
+	getCertPermissionsString: function(permissions){
+		/** 
+		 * Although the permissions is 4 bytes(32 bits), the first 2 bytes are 0xFF,0xFF,
+		 * so we only check the last 2 bytes.
+		 * @type {number}
+		 */
+		var protection = 65535; // 16 bit: (11111111 11111111)
+		if(permissions){
+			permissions.forEach(function(a_itm){
+				/** @type {number} */
+				var a_p = z.Crypto.Permission[a_itm];
+				if(a_p){
+					protection -= a_p;
+				}
+			});
+		}
+		/** @type {forge.util.ByteStringBuffer} */
+		var buff = new forge.util.ByteStringBuffer();
+		buff.fillWithByte(0xFF, 2);
+		buff.putInt16(protection);
+		return buff.getBytes();
+	},
+
+	/**
+	 * Encrypts a string using MD5 and returns it's value as a binary string.
+	 * @param {string} str input string
+	 * @return {string} MD5 encrypted binary string
+	 */
+	_md5_16: function(str){
+		/** @type {forge.md.digest} */
+		var md = forge.md.md5.create();
+		md.update(str);
+		return md.digest().getBytes();
+	},
+
+	/**
+	 * Returns the input text encrypted using AES algorithm and the specified key.
+	 * Text is padded to 16bytes blocks
+	 * @param {string} key encryption key
+	 * @param {string} txt input text to be encrypted
+	 * @return {string} encrypted text
+	 */
+	_AES: function(key, txt){
+		// padding (RFC 2898, PKCS #5: Password-Based Cryptography Specification Version 2.0)
+		/** @type {number} */
+		var padding = 16 - (txt.length & 0x0F);
+		/** @type {forge.util.ByteStringBuffer} */
+		var buff = forge.util.createBuffer(txt);
+		buff.fillWithByte(padding, padding);
+
+		/** @type {string} */
+		var iv = forge.random.getBytesSync(16);
+		/** @type {forge.util.ByteStringBuffer} */
+		var key2 = forge.util.createBuffer(key);
+		/** @type {forge.cipher.BlockCipher} */
+		var cipher = forge.cipher.createCipher("AES-CBC", key2);
+		cipher.start({iv: iv});
+		cipher.update(buff);
+		cipher.finish();
+		return iv + cipher.output.truncate(16).getBytes();
+	},
+
+	/**
+	 * Returns the input text encrypted using AES algorithm and the specified key.
+	 * Text is not padded
+	 * @param {string} key encryption key
+	 * @param {string} txt input text to be encrypted
+	 * @return {string} encrypted text
+	 */
+	_AESnopad: function(key, txt) {
+		/** @type {forge.util.ByteStringBuffer} */
+		var buff = forge.util.createBuffer(txt);
+		/** @type {string} */
+		var iv = String.fromCharCode(0).repeat(16);
+		/** @type {forge.util.ByteStringBuffer} */
+		var key2 = forge.util.createBuffer(key);
+		/** @type {forge.cipher.BlockCipher} */
+		var cipher = forge.cipher.createCipher("AES-CBC", key2);
+		cipher.start({iv: iv});
+		cipher.update(buff);
+		cipher.finish();
+		return cipher.output.truncate(16).getBytes();
+	},
+
+};
+
+z.PdfCryptor = class{
+	/**
+	 * @param {EncryptOption} encopt
+	 */
+	constructor(encopt){
+		/** @private @type {string} */
+		this.fileid = "";
+		/** @private @type {string} */
+		this.key = "";
+		/** @private @type {Array<PubKeyInfo>|undefined} */
+		this.pubkeys = encopt.pubkeys;
+		/** @private @type {z.Crypto.Mode} */
+		this.mode = /** @type {z.Crypto.Mode} */(encopt.mode);
+		/** @private @type {Array<string>|undefined} */
+		this.permissions = encopt.permissions;
+		/** @private @type {string} */
+		this.userpwd = "";
+		/** @private @type {string} */
+		this.ownerpwd = "";
+
+		/** @private @type {string} */
+		this.Filter = "Standard";
+		/** @private @type {string} */
+		this.StmF = "StdCF";
+		/** @private @type {string} */
+		this.StrF = "StdCF";
+
+		/** @private @type {number} */
+		this.V = 1;
+		/** @private @type {number} */
+		this.Length = 0;
+		/** @private @type {?CFType} */
+		this.CF = null;
+		/** @private @type {string} */
+		this.SubFilter = "";
+		/** @private @type {Array<string>} */
+		this.Recipients = null;
+
+		/** @private @type {string} */// User Validation Salt
+		this.UVS = "";
+		/** @private @type {string} */// User Key Salt
+		this.UKS = "";
+		/** @private @type {string} */// U value
+		this.U = "";
+		/** @private @type {string} */// UE value
+		this.UE = "";
+
+		/** @private @type {string} */// Owner Validation Salt
+		this.OVS = "";
+		/** @private @type {string} */// Owner Key Salt
+		this.OKS = "";
+		/** @private @type {string} */// O value
+		this.O = "";
+		/** @private @type {string} */// OE value
+		this.OE = "";
+		/** @private @type {number} */// P value
+		this.P = 0;
+		/** @private @type {string} */
+		this.perms = "";
+
+		/** @private @type {RC4LastInfo} */
+		this.rc4inf = {
+			enckey: "",
+			enckeyc: null,
+		};
+
+		if(this.pubkeys){
+			if(this.pubkeys.length == 0){
+				throw new Error("Public key information is not specified.");
+			}
+			if(this.mode == z.Crypto.Mode.RC4_40){
+				// public-Key Security requires at least 128 bit
+				this.mode = z.Crypto.Mode.RC4_128;
+			}
+			this.Filter = "Adobe.PubSec";
+			this.StmF = "DefaultCryptFilter";
+			this.StrF = "DefaultCryptFilter";
+		}
+
+		if(encopt.userpwd){
+			this.userpwd = encopt.userpwd;
+		}
+		if(encopt.ownerpwd){
+			this.ownerpwd = encopt.ownerpwd;
+		}else{
+			/** @type {forge.md.digest} */
+			var md = forge.md.md5.create();
+			md.update(z.Crypto.getRandomSeed());
+			this.ownerpwd = md.digest().toHex();
+		}
+
+		switch(this.mode){
+		case z.Crypto.Mode.RC4_40:
+			this.V = 1;
+			this.Length = 40;
+			this.CF = {CFM: "V2"};
+			break;
+		case z.Crypto.Mode.RC4_128:
+			this.V = 2;
+			this.Length = 128;
+			this.CF = {CFM: "V2"};
+			if(this.pubkeys){
+				this.SubFilter = "adbe.pkcs7.s4";
+				this.Recipients = [];
+			}
+			break;
+		case z.Crypto.Mode.AES_128:
+			this.V = 4;
+			this.Length = 128;
+			this.CF = {CFM: "AESV2", Length: 128};
+			if(this.pubkeys){
+				this.SubFilter = "adbe.pkcs7.s5";
+				this.Recipients = [];
+			}
+			break;
+		case z.Crypto.Mode.AES_256:
+			this.V = 5;
+			this.Length = 256;
+			this.CF = {CFM: "AESV3", Length: 256};
+			if(this.pubkeys){
+				this.SubFilter = "adbe.pkcs7.s5";
+				this.Recipients = [];
+			}
+			break;
+		default:
+			throw new Error("Unknown crypto mode. " + this.mode);
+		}
+	}
+
+	/**
+	 * @public
+	 * @param {PDFLib.PDFDocument|Array<number>|Uint8Array|ArrayBuffer|string} pdf
+	 * @param {PDFLib.PDFRef=} ref The unique reference will be assigned to the encryption information.
+	 * @return {Promise<PDFLib.PDFDocument>}
+	 */
+	async encryptPdf(pdf, ref){
+		/** @const {z.PdfCryptor} */
+		const _this = this;
+		/** @type {PDFLib.PDFDocument} */
+		var pdfdoc = await z.loadPdf(pdf);
+		if(pdfdoc === pdf && !ref){
+			await pdfdoc.flush();
+		}
+
+		/** @type {PDFLib.PDFContext} */
+		var pdfcont = pdfdoc.context;
+		/** @type {PDFLib.PDFObject} */
+		var trobj = _this.prepareEncrypt(pdfcont);
+
+		pdfcont.enumerateIndirectObjects().forEach(function(/** @type {PdfObjEntry} */a_arr){
+			_this.encryptObject(a_arr[0].objectNumber, a_arr[1]);
+		});
+
+		if(ref){
+			pdfcont.assign(ref, trobj);
+		}else{
+			ref = pdfcont.register(trobj);
+		}
+		pdfcont.trailerInfo.Encrypt = ref;
+
+		return pdfdoc;
+	}
+
+	/**
+	 * @public
+	 * @param {number} num
+	 * @param {PDFLib.PDFObject} val
+	 */
+	encryptObject(num, val){
+		if(val instanceof PDFLib.PDFContentStream){
+			/** @type {Uint8Array} */
+			var dat = val.contentsCache.access();
+			if(dat){
+				val.contentsCache.value = this.encryptU8arr(num, dat);
+			}
+		}else if(val instanceof PDFLib.PDFStream){
+			if(val.contents){
+				val.contents = this.encryptU8arr(num, val.contents);
+			}
+		}else if(val instanceof PDFLib.PDFHexString){
+			if(val.value){
+				val.value = this.encryptHexstr(num, val.value);
+			}
+		}else if(val instanceof PDFLib.PDFString){
+			if(val.value){
+				val.value = z.Crypto._escape(this._encrypt_data(num, val.value));
+			}
+		}
+		if(val.dict instanceof Map){
+			/** @type {Iterator} */
+			var es = val.dict.entries();
+			/** @type {IIterableResult<PdfObjEntry>} */
+			var res = es.next();
+			while(!res.done){
+				this.encryptObject(num, res.value[1]);
+				res = es.next();
+			}
+		}
+	}
+
+	/**
+	 * Prepare for encryption and create the object for saving in trailer.
+	 *
+	 * @private
+	 * @param {PDFLib.PDFContext} pdfcont
+	 * @return {PDFLib.PDFObject}
+	 */
+	prepareEncrypt(pdfcont){
+		if(!pdfcont.trailerInfo.ID){
+			/** @type {forge.md.digest} */
+			var md = forge.md.md5.create();
+			md.update(z.Crypto.getRandomSeed());
+			/** @type {forge.util.ByteStringBuffer} */
+			var res = md.digest();
+			/** @type {string} */
+			var idhex = res.toHex();
+			/** @type {string} */
+			this.fileid = res.getBytes();
+
+			/** @type {PDFLib.PDFArray} */
+			var trIds = new PDFLib.PDFArray(pdfcont);
+			trIds.push(PDFLib.PDFHexString.of(idhex));
+			trIds.push(PDFLib.PDFHexString.of(idhex));
+			pdfcont.trailerInfo.ID = trIds;
+
+		}else{
+			this.fileid = forge.util.hexToBytes(pdfcont.trailerInfo.ID.get(0).value);
+		}
+		this._generateencryptionkey();
+
+		var obj = {};
+		obj.Filter = this.Filter;
+		if(this.SubFilter){
+			obj.SubFilter = this.SubFilter;
+		}
+		// V is a code specifying the algorithm to be used in encrypting and decrypting the document
+		obj.V = this.V;
+		// The length of the encryption key, in bits. The value shall be a multiple of 8, in the range 40 to 256
+		obj.Length = this.Length;
+		if(this.V >= 4){
+			// A dictionary whose keys shall be crypt filter names and whose values shall be the corresponding crypt filter dictionaries.
+			if(this.CF){
+				/** @type {Object<string, *>} */
+				var objStmF = {
+					Type: "CryptFilter",
+				};
+				// The method used
+				if(this.CF.CFM){
+					objStmF.CFM = this.CF.CFM;
+					if(this.pubkeys){
+						/** @type {PDFLib.PDFArray} */
+						var recps1 = new PDFLib.PDFArray(pdfcont);
+						this.Recipients.forEach(function(a_ele){
+							recps1.push(PDFLib.PDFHexString.of(a_ele));
+						});
+						objStmF.Recipients = recps1;
+						if(typeof this.CF.EncryptMetadata == "boolean" && !this.CF.EncryptMetadata){
+							objStmF.EncryptMetadata = false;
+						}else{
+							objStmF.EncryptMetadata = true;
+						}
+					}
+				}else{
+					objStmF.CFM = "None";
+				}
+				// The event to be used to trigger the authorization that is required to access encryption keys used by this filter.
+				if(this.CF.AuthEvent){
+					objStmF.AuthEvent = this.CF.AuthEvent;
+				}else{
+					objStmF.AuthEvent = "DocOpen";
+				}
+				// The bit length of the encryption key.
+				if(this.CF.Length){
+					objStmF.Length = this.CF.Length;
+				}
+
+				/** @type {Object<string, *>} */
+				var objCF = {
+					[this.StmF]: pdfcont.obj(objStmF),
+				};
+				obj.CF = pdfcont.obj(objCF);
+			}
+			// The name of the crypt filter that shall be used by default when decrypting streams.
+			obj.StmF = this.StmF;
+			// The name of the crypt filter that shall be used when decrypting all strings in the document.
+			obj.StrF = this.StrF;
+		}
+		// Additional encryption dictionary entries for the standard security handler
+		if(this.pubkeys){
+			if(this.V < 4 && this.Recipients && this.Recipients.length > 0){
+				/** @type {PDFLib.PDFArray} */
+				var recps = new PDFLib.PDFArray(pdfcont);
+				this.Recipients.forEach(function(a_ele){
+					recps.push(PDFLib.PDFHexString.of(a_ele));
+				});
+				obj.Recipients = recps;
+			}
+		}else{
+			if(this.V == 5){ // AES-256
+				obj.R = 5;
+				obj.OE = PDFLib.PDFString.of(z.Crypto._escape(this.OE));
+				obj.UE = PDFLib.PDFString.of(z.Crypto._escape(this.UE));
+				obj.Perms = PDFLib.PDFString.of(z.Crypto._escape(this.perms));
+			}else if(this.V == 4){ // AES-128
+				obj.R = 4;
+			}else if(this.V < 2){ // RC-40
+				obj.R = 2;
+			}else{ // RC-128
+				obj.R = 3;
+			}
+			obj.O = PDFLib.PDFString.of(z.Crypto._escape(this.O));
+			obj.U = PDFLib.PDFString.of(z.Crypto._escape(this.U));
+			obj.P = this.P;
+			if(typeof this.EncryptMetadata == "boolean" && !this.EncryptMetadata){
+				obj.EncryptMetadata = false;
+			}else{
+				obj.EncryptMetadata = true;
+			}
+		}
+		return pdfcont.obj(obj);
+	}
+
+	/**
+	 * @private
+	 * @param {number} num
+	 * @param {Uint8Array} dat
+	 * @return {Uint8Array}
+	 */
+	encryptU8arr(num, dat){
+		/** @type {string} */
+		var str = z.u8arrToRaw(dat);
+		/** @type {string} */
+		var enc = this._encrypt_data(num, str);
+		return z.rawToU8arr(enc);
+	}
+
+	/**
+	 * @private
+	 * @param {number} num
+	 * @param {string} dat
+	 * @return {string}
+	 */
+	encryptHexstr(num, dat){
+		/** @type {string} */
+		var str = forge.util.hexToBytes(dat);
+		/** @type {string} */
+		var enc = this._encrypt_data(num, str);
+		return forge.util.createBuffer(enc).toHex();
+	}
+
+	/**
+	 * Compute encryption key depending on object number where the encrypted data is stored.
+	 * This is used for all strings and streams without crypt filter specifier.
+	 *
+	 * @private
+	 * @param {number} n object number
+	 * @return {string} object key
+	 */
+	_objectkey(n){
+		/** @type {forge.util.ByteStringBuffer} */
+		var buff = forge.util.createBuffer(this.key);
+		//pack('VXxx', $n)
+		buff.putInt24Le(n);
+		buff.putBytes(String.fromCharCode(0) + String.fromCharCode(0));
+		if (this.mode == z.Crypto.Mode.AES_128) {
+			// AES padding
+			buff.putBytes("sAlT");
+		}
+
+		/** @type {forge.md.digest} */
+		var md = forge.md.md5.create();
+		md.update(buff.getBytes());
+		/** @type {forge.util.ByteStringBuffer} */
+		var ret = md.digest();
+		return ret.getBytes().substr(0, Math.min(16, (this.Length / 8) + 5));
+	}
+
+	/**
+	 * Encrypt the input string.
+	 *
+	 * @private
+	 * @param {number} n object number
+	 * @param {string} s data string to encrypt
+	 * @return {string} encrypted string
+	 */
+	_encrypt_data(n, s){
+		switch(this.mode){
+		case z.Crypto.Mode.RC4_40:
+		case z.Crypto.Mode.RC4_128:
+			s = z.Crypto._RC4(this._objectkey(n), s, this.rc4inf);
+			break;
+		case z.Crypto.Mode.AES_128:
+			s = z.Crypto._AES(this._objectkey(n), s);
+			break;
+		case z.Crypto.Mode.AES_256:
+			s = z.Crypto._AES(this.key, s);
+			break;
+		}
+		return s;
+	}
+
+	/**
+	 * Compute U value (used for encryption)
+	 * @private
+	 * @return {string} U value
+	 */
+	_Uvalue(){
+		/** @type {string} */
+		var ret = "";
+		if(this.mode == z.Crypto.Mode.RC4_40){
+			ret = z.Crypto._RC4(this.key, z.Crypto.EncPadding, this.rc4inf);
+		}else if(this.mode < z.Crypto.Mode.AES_256) { // RC4-128, AES-128
+			/** @type {string} */
+			var tmp = z.Crypto._md5_16(z.Crypto.EncPadding + this.fileid);
+			/** @type {string} */
+			var enc = z.Crypto._RC4(this.key, tmp, this.rc4inf);
+			/** @type {number} */
+			var len = tmp.length;
+			for(var i=1; i<=19; i++){
+				/** @type {string} */
+				var ek = "";
+				for(var j=0; j<len; j++){
+					ek += String.fromCharCode(this.key.charCodeAt(j) ^ i);
+				}
+				enc = z.Crypto._RC4(ek, enc, this.rc4inf);
+			}
+			enc += String.fromCharCode(0).repeat(16);
+			ret = enc.substr(0, 32);
+
+		}else if(this.mode == z.Crypto.Mode.AES_256){
+			/** @type {string} */
+			var seed = z.Crypto._md5_16(z.Crypto.getRandomSeed());
+			// User Validation Salt
+			/** @type {string} */
+			this.UVS = seed.substr(0, 8);
+			// User Key Salt
+			/** @type {string} */
+			this.UKS = seed.substr(8, 16);
+
+			/** @type {forge.md.digest} */
+			var md = forge.md.sha256.create();
+			md.update(this.userpwd + this.UVS);
+			ret = md.digest().getBytes() + this.UVS + this.UKS;
+		}
+		return ret;
+	}
+
+	/**
+	 * Compute UE value (used for encryption)
+	 * @private
+	 * @return {string} UE value
+	 */
+	_UEvalue(){
+		/** @type {forge.md.digest} */
+		var md = forge.md.sha256.create();
+		md.update(this.userpwd + this.UKS);
+		return z.Crypto._AESnopad(md.digest().getBytes(), this.key);
+	}
+
+	/**
+	 * Compute O value (used for encryption)
+	 * @private
+	 * @return {string} O value
+	 */
+	_Ovalue(){
+		/** @type {string} */
+		var ret = "";
+		if(this.mode < z.Crypto.Mode.AES_256){ // RC4-40, RC4-128, AES-128
+			/** @type {string} */
+			var tmp = z.Crypto._md5_16(this.ownerpwd);
+			if(this.mode > z.Crypto.Mode.RC4_40){
+				for(var i=0; i<50; i++){
+					tmp = z.Crypto._md5_16(tmp);
+				}
+			}
+			/** @type {string} */
+			var owner_key = tmp.substr(0, this.Length / 8);
+			ret = z.Crypto._RC4(owner_key, this.userpwd, this.rc4inf);
+			if(this.mode > z.Crypto.Mode.RC4_40){
+				/** @type {number} */
+				var len = owner_key.length;
+				for(var i=1; i<=19; i++){
+					/** @type {string} */
+					var ek = "";
+					for(var j=0; j<len; j++){
+						ek += String.fromCharCode(owner_key.charCodeAt(j) ^ i);
+					}
+					ret = z.Crypto._RC4(ek, ret, this.rc4inf);
+				}
+			}
+		}else if(this.mode == z.Crypto.Mode.AES_256){
+			/** @type {string} */
+			var seed = z.Crypto._md5_16(z.Crypto.getRandomSeed());
+			// Owner Validation Salt
+			/** @type {string} */
+			this.OVS = seed.substr(0, 8);
+			// Owner Key Salt
+			/** @type {string} */
+			this.OKS = seed.substr(8, 16);
+
+			/** @type {forge.md.digest} */
+			var md = forge.md.sha256.create();
+			md.update(this.ownerpwd + this.OVS + this.U);
+			ret = md.digest().getBytes() + this.OVS + this.OKS;
+		}
+		return ret;
+	}
+
+	/**
+	 * Compute OE value (used for encryption)
+	 * @private
+	 * @return {string} OE value
+	 */
+	_OEvalue(){
+		/** @type {forge.md.digest} */
+		var md = forge.md.sha256.create();
+		md.update(this.ownerpwd + this.OKS + this.U);
+		return z.Crypto._AESnopad(md.digest().getBytes(), this.key);
+	}
+
+	/**
+	 * Convert password for AES-256 encryption mode
+	 * @private
+	 * @param {string} pwd password
+	 * @return {string} password
+	 */
+	_fixAES256Password(pwd) {
+		return pwd.substr(0, 127);
+	}
+
+	/**
+	 * Compute encryption key
+	 * @private
+	 */
+	_generateencryptionkey(){
+		/** @type {number} */
+		var keybytelen = this.Length / 8;
+		/** @type {forge.md.digest} */
+		var md = null;
+		// standard mode
+		if(!this.pubkeys){
+			/** @type {number} */
+			var protection = z.Crypto.getUserPermissionCode(this.permissions, this.mode);
+			if(this.mode == z.Crypto.Mode.AES_256){
+				// generate 256 bit random key
+				md = forge.md.sha256.create();
+				md.update(z.Crypto.getRandomSeed());
+				this.key = md.digest().getBytes().substr(0, keybytelen);
+				// truncate passwords
+				this.userpwd = this._fixAES256Password(this.userpwd);
+				this.ownerpwd = this._fixAES256Password(this.ownerpwd);
+				// Compute U value
+				this.U = this._Uvalue();
+				// Compute UE value
+				this.UE = this._UEvalue();
+				// Compute O value
+				this.O = this._Ovalue();
+				// Compute OE value
+				this.OE = this._OEvalue();
+				// Compute P value
+				this.P = protection;
+				// Computing the encryption dictionary's Perms (permissions) value
+				/** @type {string} */
+				var perms = z.Crypto.getUserPermissionsString(protection); // bytes 0-3
+				perms += String.fromCharCode(255).repeat(4); // bytes 4-7
+				if(typeof this.CF.EncryptMetadata == "boolean" && !this.CF.EncryptMetadata){ // byte 8
+					perms += "F";
+				}else{
+					perms += "T";
+				}
+				perms += "adb"; // bytes 9-11
+				perms += "nick"; // bytes 12-15
+				this.perms = z.Crypto._AESnopad(this.key, perms);
+			}else{ // RC4-40, RC4-128, AES-128
+				// Pad passwords
+				this.userpwd = (this.userpwd + z.Crypto.EncPadding).substr(0, 32);
+				this.ownerpwd = (this.ownerpwd + z.Crypto.EncPadding).substr(0, 32);
+				// Compute O value
+				this.O = this._Ovalue();
+				// get default permissions string (reverse byte order)
+				/** @type {string} */
+				var permissionstr = z.Crypto.getUserPermissionsString(protection);
+				// Compute encryption key
+				/** @type {string} */
+				var tmp = z.Crypto._md5_16(this.userpwd + this.O + permissionstr + this.fileid);
+				if(this.mode > z.Crypto.Mode.RC4_40) {
+					for(var i=0; i<50; i++){
+						tmp = z.Crypto._md5_16(tmp.substr(0, keybytelen));
+					}
+				}
+				this.key = tmp.substr(0, keybytelen);
+				// Compute U value
+				this.U = this._Uvalue();
+				// Compute P value
+				this.P = protection;
+			}
+		// Public-Key mode
+		}else{
+			// random 20-byte seed
+			md = forge.md.sha1.create();
+			md.update(z.Crypto.getRandomSeed());
+			/** @type {string} */
+			var seed = md.digest().getBytes();
+			/** @type {string} */
+			var recipient_bytes = "";
+			/** @type {string} */
+			var pkpermissionstr = z.Crypto.getCertPermissionsString(this.permissions);
+			// for each public certificate
+			this.pubkeys.forEach(function(/** @type {PubKeyInfo} */a_pubkey){
+				// get permissions string
+				/** @type {string} */
+				var a_pkpermissionstr = pkpermissionstr;
+				if(a_pubkey.p){
+					a_pkpermissionstr = z.Crypto.getCertPermissionsString(a_pubkey.p);
+				}
+				// envelope data
+				/** @type {string} */
+				var a_envelope = seed + a_pkpermissionstr;
+				/** @type {forge_cert} */
+				var a_cert = null;
+				if(a_pubkey.c){
+					if(a_pubkey.c.issuer){
+						a_cert = /** @type {forge_cert} */(a_pubkey.c);
+					}else{
+						/** @type {string} */
+						var a_cerstr = "";
+						if(typeof a_pubkey.c == "string"){
+							a_cerstr = a_pubkey.c;
+						}else{
+							a_cerstr = z.u8arrToRaw(new Uint8Array(/** @type {Array<number>|ArrayBuffer|Uint8Array} */(a_pubkey.c)));
+						}
+						a_cert = z.loadCert(a_cerstr);
+						z.fixCertAttributes(a_cert);
+					}
+				}else{
+					throw new Error("We need a certificate.");
+				}
+				// create a p7 enveloped message
+				/** @type {forge.pkcs7} */
+				var a_p7 = forge.pkcs7.createEnvelopedData();
+				// add a recipient
+				a_p7.addRecipient(a_cert);
+				// set content
+				a_p7.content = forge.util.createBuffer(a_envelope);
+				// encrypt
+				a_p7.encrypt();
+				/** @type {forge.util.ByteStringBuffer} */
+				var a_signature = forge.asn1.toDer(a_p7.toAsn1());
+				/** @type {string} */
+				var a_hexsignature = a_signature.toHex();
+				this.Recipients.push(a_hexsignature);
+				recipient_bytes += a_signature.getBytes();
+			}.bind(this));
+			// calculate encryption key
+			if(this.mode == z.Crypto.Mode.AES_256){
+				md = forge.md.sha256.create();
+			}else{ // RC4-40, RC4-128, AES-128
+				md = forge.md.sha1.create();
+			}
+			md.update(seed + recipient_bytes);
+			this.key = md.digest().getBytes().substr(0, keybytelen);
+		}
+	}
+};
+
+}
+
+//Only for nodejs Start//
+if(typeof exports === "object" && typeof module !== "undefined"){
+	module.exports = supplyZgaCryptor;
+}
+//Only for nodejs End//
--- a/lib/zgapdfsigner.js
+++ b/lib/zgapdfsigner.js
--- a/logo.png
+++ b/logo.png
--- a/package-lock.json
+++ b/package-lock.json
@ -0,0 +1,362 @@
+{
+  "name": "zgapdfsigner",
+  "version": "2.7.2",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "zgapdfsigner",
+      "version": "2.7.2",
+      "license": "MIT",
+      "dependencies": {
+        "follow-redirects": "1.15.6",
+        "node-forge": "1.3.1",
+        "pdf-fontkit": "1.8.9",
+        "pdf-lib": "1.17.1"
+      },
+      "devDependencies": {
+        "google-closure-compiler": "^20231112.0.0"
+      }
+    },
+    "node_modules/@pdf-lib/standard-fonts": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/@pdf-lib/standard-fonts/-/standard-fonts-1.0.0.tgz",
+      "integrity": "sha512-hU30BK9IUN/su0Mn9VdlVKsWBS6GyhVfqjwl1FjZN4TxP6cCw0jP2w7V3Hf5uX7M0AZJ16vey9yE0ny7Sa59ZA==",
+      "dependencies": {
+        "pako": "^1.0.6"
+      }
+    },
+    "node_modules/@pdf-lib/upng": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@pdf-lib/upng/-/upng-1.0.1.tgz",
+      "integrity": "sha512-dQK2FUMQtowVP00mtIksrlZhdFXQZPC+taih1q4CvPZ5vqdxR/LKBaFg0oAfzd1GlHZXXSPdQfzQnt+ViGvEIQ==",
+      "dependencies": {
+        "pako": "^1.0.10"
+      }
+    },
+    "node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "dev": true,
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/chalk": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
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+      "dev": true,
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+}
--- a/package.json
+++ b/package.json
@ -0,0 +1,46 @@
+{
+  "name": "zgapdfsigner",
+  "version": "2.7.3",
+  "author": "zboris12",
+  "description": "A javascript tool to sign a pdf or set protection to a pdf in web browser, Google Apps Script and nodejs.",
+  "homepage": "https://github.com/zboris12/zgapdfsigner",
+  "private": false,
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/zboris12/zgapdfsigner.git"
+  },
+  "bugs": {
+    "url": "https://github.com/zboris12/zgapdfsigner/issues"
+  },
+  "license": "MIT",
+  "main": "lib/zganode.js",
+  "unpkg": "dist/zgapdfsigner.min.js",
+  "files": [
+    "dist/*.min.js",
+    "lib/*.d.ts",
+    "lib/*.js"
+  ],
+  "keywords": [
+    "pdf-sign",
+    "pdf-signature",
+    "pdf-protection",
+    "pdf-encryption",
+    "google-apps-script",
+    "LTV",
+    "TSA",
+    "長期署名"
+  ],
+  "scripts": {
+    "build": "./build.sh",
+    "test": "node test4node.js ${pfxpwd}"
+  },
+  "dependencies": {
+    "follow-redirects": "1.15.6",
+    "node-forge": "1.3.1",
+    "pdf-fontkit": "1.8.9",
+    "pdf-lib": "1.17.1"
+  },
+  "devDependencies": {
+    "google-closure-compiler": "^20231112.0.0"
+  }
+}
--- a/test-ts/.vscode/settings.json
+++ b/test-ts/.vscode/settings.json
@ -0,0 +1,5 @@
+{
+  "editor.tabSize": 2,
+  "editor.formatOnSave": true,
+  "files.eol": "\n"
+}
--- a/test-ts/package.json
+++ b/test-ts/package.json
@ -0,0 +1,20 @@
+{
+  "name": "zgapdfsigner-test-ts",
+  "version": "1.0.0",
+  "author": "zboris12",
+  "description": "A typescript program to test zgapdfsigner.",
+  "private": false,
+  "license": "MIT",
+  "main": "index.js",
+  "scripts": {
+    "build": "tsc",
+    "test": "node test/index.js ${pfxpwd}"
+  },
+  "dependencies": {
+    "zgapdfsigner": "^2.7.1"
+  },
+  "devDependencies": {
+    "@types/node-forge": "^1.3.11",
+    "typescript": "~4.9"
+  }
+}
--- a/test-ts/src/index.ts
+++ b/test-ts/src/index.ts
@ -0,0 +1,149 @@
+import * as m_fs from "node:fs";
+import * as  m_path from "node:path";
+import * as Zga from "zgapdfsigner";
+
+const workpath = "./";
+
+async function sign_protect(pdfPath: string, pfxPath: string, ps: string, perm: number, imgPath?: string, txt?: string, fontPath?: string): Promise<string> {
+  let pdf: Buffer = m_fs.readFileSync(pdfPath);
+  let pfx: Buffer = m_fs.readFileSync(pfxPath);
+  let img: Buffer | undefined = undefined;
+  let imgType: string = "";
+  let font: Buffer | Zga.PDFLib.StandardFonts | undefined = undefined;
+
+  if (perm == 1) {
+    console.log("\nTest signing pdf with full protection. (permission 1 and password encryption)");
+  } else {
+    console.log("\nTest signing pdf with permission " + perm);
+  }
+
+  if (imgPath) {
+    img = m_fs.readFileSync(imgPath);
+    imgType = m_path.extname(imgPath).slice(1);
+  }
+  if (fontPath) {
+    if (Zga.PDFLib.isStandardFont(fontPath)) {
+      font = fontPath as string as Zga.PDFLib.StandardFonts;
+    } else {
+      font = m_fs.readFileSync(fontPath);
+    }
+  }
+  let sopt: Zga.SignOption = {
+    p12cert: pfx,
+    pwd: ps,
+    permission: perm,
+    signdate: "1",
+    reason: "I have a test reason " + perm + ".",
+    location: "I am on the earth " + perm + ".",
+    contact: "zga" + perm + "@zga.com",
+    ltv: 1,
+    debug: true,
+  };
+  if (img || txt) {
+    sopt.drawinf = {
+      area: {
+        x: perm ? 25 : 200, // left
+        y: 50, // top
+        w: txt ? undefined : 60,
+        h: txt ? undefined : 100,
+      },
+      pageidx: "-",
+      imgInfo: img ? {
+        imgData: img,
+        imgType: imgType,
+      } : undefined,
+      textInfo: txt ? {
+        text: txt,
+        fontData: font,
+        color: "00f0f1",
+        lineHeight: 20,
+        size: 16,
+        align: 1,
+        wMax: 80,
+        yOffset: 10,
+        xOffset: 20,
+        noBreaks: "[あいうえおA-Za-z0-9]",
+      } : undefined,
+    };
+  }
+
+  let eopt: Zga.EncryptOption | undefined = undefined;
+  if (perm == 1) {
+    eopt = {
+      mode: Zga.Crypto.Mode.AES_256,
+      permissions: ["copy", "copy-extract", "print-high"],
+      userpwd: "123",
+    };
+  }
+
+  let ser: Zga.PdfSigner = new Zga.PdfSigner(sopt);
+  let u8dat: Uint8Array = await ser.sign(pdf, eopt);
+  let outPath: string = "";
+  if (u8dat) {
+    outPath = m_path.join(__dirname, workpath + "test_perm" + perm + m_path.basename(pdfPath));
+    m_fs.writeFileSync(outPath, u8dat);
+    console.log("Output file: " + outPath);
+  }
+  return outPath;
+}
+
+async function addtsa(pdfPath: string): Promise<string> {
+  console.log("\nTest signing pdf by a timestamp.");
+
+  let pdf: Buffer = m_fs.readFileSync(pdfPath);
+  let sopt: Zga.SignOption = {
+    signdate: "2",
+    reason: "I have a test reason tsa.",
+    location: "I am on the earth tsa.",
+    contact: "zgatsa@zga.com",
+    ltv: 1,
+    debug: true,
+  };
+  let ser: Zga.PdfSigner = new Zga.PdfSigner(sopt);
+  let u8dat: Uint8Array = await ser.sign(pdf);
+  let outPath: string = m_path.join(__dirname, workpath + "tsa_" + m_path.basename(pdfPath));
+  m_fs.writeFileSync(outPath, u8dat);
+  console.log("Output file: " + outPath);
+  return outPath;
+}
+
+async function main1(angle: number): Promise<void> {
+  let pdfPath: string = m_path.join(__dirname, workpath + "_test" + (angle ? "_" + angle : "") + ".pdf");
+  let pfxPath: string = m_path.join(__dirname, workpath + "_test.pfx");
+  let ps: string = "";
+  let imgPath: string = m_path.join(__dirname, workpath + "_test.png");
+  let fontPath: string = angle ? Zga.PDFLib.StandardFonts.TimesRomanBold : m_path.join(__dirname, workpath + "_test.ttf");
+
+  if (process.argv.length > 3) {
+    pfxPath = process.argv[2];
+    ps = process.argv[3];
+  } else if (process.argv[2]) {
+    ps = process.argv[2];
+  }
+
+  if (!ps) {
+    // throw new Error("The passphrase is not specified.");
+    pfxPath = "";
+  }
+
+  if (pfxPath) {
+    await sign_protect(pdfPath, pfxPath, ps, 1, imgPath, "あいうえおあいうえおか\r\n\nThis is a test of text!\n");
+    pdfPath = await sign_protect(pdfPath, pfxPath, ps, 2, imgPath, (angle ? "" : "ありがとうご\r\n\n") + "This is an another test of text!\n", fontPath);
+    pdfPath = await sign_protect(pdfPath, pfxPath, ps, 0, undefined, (angle ? "" : "たちつて得\n\n") + "This is a test for same font!\n", fontPath);
+    await addtsa(pdfPath);
+  } else {
+    await addtsa(pdfPath);
+  }
+
+  console.log("Done");
+}
+
+async function main(): Promise<void> {
+  let arr: Array<number> = [0, 90, 180, 270];
+  for (let i = 0; i < arr.length; i++) {
+    await main1(arr[i]);
+    // break;
+  }
+}
+
+main();
--- a/test-ts/tsconfig.json
+++ b/test-ts/tsconfig.json
@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "target": "es2015",
+    "module": "commonjs",
+    "newLine": "LF",
+    "declaration": true,
+    "sourceMap": true,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "noImplicitThis": true,
+    "rootDir": "./src",
+    "outDir": "./test",
+    "typeRoots": [
+      "node_modules/@types"
+    ]
+  },
+  "include": [
+    "src/**/*"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}
--- a/test.html
+++ b/test.html
@ -4,22 +4,36 @@
 <meta http-equiv="content-type" content="text/html; charset=UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title> Test for ZgaPdfSigner </title>
-<script src="https://unpkg.com/node-forge/dist/forge.min.js" type="text/javascript"></script>
-<script src="https://unpkg.com/pdf-lib/dist/pdf-lib.min.js" type="text/javascript"></script>
-<script src="zgapdfsigner.js" type="text/javascript"></script>
+<script src="https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js" type="text/javascript"></script>
+<script src="https://unpkg.com/pdf-fontkit@1.8.9/dist/fontkit.umd.min.js" type="text/javascript"></script>
+<script src="https://unpkg.com/pako@1.0.11/dist/pako_inflate.min.js" type="text/javascript"></script>
+<script src="https://unpkg.com/node-forge@1.3.1/dist/forge.min.js" type="text/javascript"></script>
+<script src="dist/zgapdfsigner.min.js" type="text/javascript"></script>
 <script type="text/javascript">
-function test(){
-	var img = document.getElementById("img").files[0];
-	if(img){
-		readAsArrayBuffer(img, function(a_buff){
-			testSign(a_buff, getFilExt(img));
-		});
+/**
+ * @param {string} fid
+ * @return {Promise<ArrayBuffer>}
+ */
+function readFile(fid){
+	return new Promise((resolve, reject) => {
+		var f = document.getElementById(fid).files[0];
+		if(f){
+			var reader = new FileReader();
+			reader.onload = function(a_evt){
+				resolve(a_evt.target.result);
+			};
+			reader.readAsArrayBuffer(f);
 		}else{
-		testSign();
+			resolve(null);
 		}
+	});
 }
-function getFilExt(f){
-	var n = f.name;
+/**
+ * @param {string} fid
+ * @return {string}
+ */
+function getFilExt(fid){
+	var n = document.getElementById(fid).files[0].name;
 	var i = n.lastIndexOf(".");
 	if(i >= 0){
 		return n.slice(i + 1);
@ -27,50 +41,210 @@ function getFilExt(f){
 		return null;
 	}
 }
-function readAsArrayBuffer(f, func){
-	var reader = new FileReader();
-	reader.onload = function(a_evt){
-		func(a_evt.target.result);
-	};
-	reader.readAsArrayBuffer(f);
+async function testMe(){
+	/** @type {ArrayBuffer} */
+	var pdf = await readFile("fff");
+	if(!pdf){
+		alert("The target pdf is not specified.");
+		return;
 	}
-function testSign(imgdat, imgtyp){
-	var fil = document.getElementById("fff").files[0];
-	var kf = document.getElementById("kkk").files[0];
-	readAsArrayBuffer(fil, function(a_pdf){
-		readAsArrayBuffer(kf, async function(b_kfbuf){
-			var b_opt = {
-				p12cert: b_kfbuf,
-				pwd: document.getElementById("pwd").value,
+
+	/** @type {ArrayBuffer} */
+	var pfx = await readFile("kkk");
+	/** @type {string} */
+	var ps = document.getElementById("pwd").value;
+	if(pfx && !ps){
+		alert("The passphrase is not specified.");
+		return;
+	}
+
+	/** @type {ArrayBuffer} */
+	var img = await readFile("img");
+	/** @type {string} */
+	var imgType = "";
+	if(img){
+		imgType = getFilExt("img");
+	}
+	/** @type {string} */
+	var txt = document.getElementById("txt").value;
+	/** @type {ArrayBuffer} */
+	var font = await readFile("font");
+
+	/** @type {ArrayBuffer} */
+	var pubcert = await readFile("pubcert");
+	/** @type {string} */
+	var upwd = document.getElementById("upwd").value;
+
+	/** @type {SignOption} */
+	var sopt = null;
+	if(pfx){
+		sopt = {
+			p12cert: pfx,
+			pwd: ps,
+			permission: parseInt(document.getElementById("sperm").value),
+			reason: document.getElementById("tReason").value,
+			location: document.getElementById("tLocation").value,
+			contact: document.getElementById("tContact").value,
+			debug: true,
 		};
-			if(imgdat){
-				b_opt.drawinf = {
+		if(img || txt){
+			sopt.drawinf = {
 				area: {
-						x: 25, // left
+					x: parseInt(document.getElementById("drawx").value), // left
 					y: 150, // top
-						w: 60,
-						h: 60,
+					w: txt ? undefined : 60,
+					h: txt ? undefined : 100,
 				},
-					imgData: imgdat,
-					imgType: imgtyp,
+				pageidx: "-",
+				imgInfo: img ? {
+					imgData: img,
+					imgType: imgType,
+				} : undefined,
+				textInfo: txt ? {
+					text: txt,
+					fontData: font,
+					subset: true,
+					color: "f00",
+					size: 16,
+					align: 2,
+					wMax: 80,
+					yOffset: 10,
+					xOffset: 20,
+					noBreaks: "[あいうえおA-Za-z0-9]",
+				} : undefined,
 			};
 		}
-			var b_signer = new Zga.PdfSigner(b_opt);
-			var b_u8s = await b_signer.sign(a_pdf);
-			document.getElementById("download").download = "zzzs3.pdf";
-			document.getElementById("download").href = window.URL.createObjectURL(new Blob([b_u8s], {"type" : "application/pdf"}));
+	}
+
+	/** @type {EncryptOption} */
+	var eopt = undefined;
+	if(pubcert || upwd){
+		eopt = {
+			mode: parseInt(document.getElementById("mode").value),
+			permissions: [],
+		};
+		Array.from(document.getElementsByName("perms")).forEach((a_chk) => {
+			if(!a_chk.checked){
+				eopt.permissions.push(a_chk.value);
+			}
+		});
+		if(pubcert){
+			eopt.pubkeys = [{
+				c: pubcert,
+			}];
+		}else if(upwd){
+			eopt.userpwd = upwd;
+		}
+	}
+
+	/** @type {Uint8Array} */
+	var u8dat = null;
+	if(sopt){
+		/** @type {Zga.PdfSigner} */
+		var ser = new Zga.PdfSigner(sopt);
+		u8dat = await ser.sign(pdf, eopt);
+	}else if(eopt){
+		/** @type {Zga.PdfCryptor} */
+		var crypr = new Zga.PdfCryptor(eopt);
+		/** @type {PDFLib.PDFDocument} */
+		var pdfdoc = await crypr.encryptPdf(pdf);
+		u8dat = await pdfdoc.save({"useObjectStreams": false});
+	}else{
+		alert("Nothing to do.");
+		return;
+	}
+
+	document.getElementById("download").download = "test_test.pdf";
+	document.getElementById("download").href = window.URL.createObjectURL(new Blob([u8dat], {"type" : "application/pdf"}));
 	document.getElementById("download").click();
+}
+function test(){
+	testMe().catch((err) => {
+		console.error(err);
+		alert(err.message);
 	});
+}
+function clearFiles(){
+	["fff","kkk","img","font","pubcert"].forEach((a_id) => {
+		document.getElementById(a_id).value = "";
 	});
 }
+function changeSperm(){
+	/** @type {Element} */
+	var sel = window.event.currentTarget || window.event.srcElement || window.event.target;
+	/** @type {Element} */
+	var spn = document.getElementById("spcmt");
+	switch(sel.value){
+	case "1":
+		spn.innerText = "No changes to the document are permitted; any change to the document invalidates the signature.";
+		break;
+	case "2":
+		spn.innerText = "Permitted changes are filling in forms, instantiating page templates, and signing; other changes invalidate the signature.";
+		break;
+	case "3":
+		spn.innerText = "Permitted changes are the same as for 2, as well as annotation creation, deletion, and modification; other changes invalidate the signature.";
+		break;
+	default:
+		spn.innerText = "";
+		break;
+	}
+}
 </script>
+<style>
+body {
+	line-height: 1.5em;
+}
+span.header {
+	font-weight: bold;
+	color: blue;
+}
+</style>
 </head>
 <body>
 <label>pdf </label><input type="file" id="fff" /><br />
+<hr />
+<span class="header">Sign the PDF:</span><br />
 <label>certificate </label><input type="file" id="kkk" /><br />
 <label>passphrase </label><input type="password" id="pwd" /><br />
 <label>signature image </label><input type="file" id="img" /><br />
-<a id="download" href="#" download="" style="display: none;" target="_blank">dummy</a>
+<label>signature text </label><input type="text" id="txt" /><br />
+<label>text font </label><input type="file" id="font" /><br />
+<label>left </label><input type="text" id="drawx" value="25" /><br />
+<label>permission </label>
+<select id="sperm" onchange="changeSperm()">
+<option value="0">No DocMDP</option>
+<option value="1">DocMDP pattern 1</option>
+<option value="2">DocMDP pattern 2</option>
+<option value="3">DocMDP pattern 3</option>
+</select>
+<span id="spcmt"></span><br />
+<label>reason </label><input type="text" id="tReason" value="I have a test reason." /><br />
+<label>location </label><input type="text" id="tLocation" value="I am on the earth." /><br />
+<label>contact </label><input type="text" id="tContact" value="zga@zga.com" /><br />
+<hr />
+<span class="header">Encrypt the PDF:</span><br />
+<label>encryption </label>
+<select id="mode">
+<option value="0">RC4-40</option>
+<option value="1">RC4-128</option>
+<option value="2">AES-128</option>
+<option value="3">AES-256</option>
+</select><br />
+<label>user password </label><input type="password" id="upwd" /><br />
+<label>public certificate </label><input type="file" id="pubcert" /><br />
+<label>permissions: </label><br />
+<input type="checkbox" id="pCopy" name="perms" value="copy" checked><label for="pCopy">"copy": Copy text and graphics from the document. (Only valid on public-key mode)</label><br />
+<input type="checkbox" id="pPrint" name="perms" value="print" checked><label for="pPrint">"print": Print the document.</label><br />
+<input type="checkbox" id="pModify" name="perms" value="modify" checked><label for="pModify">"modify": Modify the contents of the document by operations other than those controlled by 'fill-forms', 'extract' and 'assemble'.</label><br />
+<input type="checkbox" id="pCopyExtract" name="perms" value="copy-extract" checked><label for="pCopyExtract">"copy-extract": Copy or otherwise extract text and graphics from the document.</label><br />
+<input type="checkbox" id="pAnnotForms" name="perms" value="annot-forms" checked><label for="pAnnotForms">"annot-forms": Add or modify text annotations, fill in interactive form fields, and, if 'modify' is also set, create or modify interactive form fields (including signature fields).</label><br />
+<input type="checkbox" id="pFillForms" name="perms" value="fill-forms" checked><label for="pFillForms">"fill-forms": Fill in existing interactive form fields (including signature fields), even if 'annot-forms' is not specified.</label><br />
+<input type="checkbox" id="pExtract" name="perms" value="extract" checked><label for="pExtract">"extract": Extract text and graphics (in support of accessibility to users with disabilities or for other purposes).</label><br />
+<input type="checkbox" id="pAssemble" name="perms" value="assemble" checked><label for="pAssemble">"assemble": Assemble the document (insert, rotate, or delete pages and create bookmarks or thumbnail images), even if 'modify' is not set.</label><br />
+<input type="checkbox" id="pPrintHigh" name="perms" value="print-high" checked><label for="pPrintHigh">"print-high": Print the document to a representation from which a faithful digital copy of the PDF content could be generated. When this is not set, printing is limited to a low-level representation of the appearance, possibly of degraded quality.</label><br />
+<hr />
 <input type="button" value="test" onclick="test()" />
+<input type="button" value="clear files" onclick="clearFiles()" />
+<a id="download" href="#" download="" style="display: none;" target="_blank">dummy</a>
 </body>
 </html>
--- a/test4node.js
+++ b/test4node.js
@ -0,0 +1,200 @@
+// ES Module Mode
+// import * as m_fs from "node:fs";
+// import * as m_path from "node:path";
+// import { fileURLToPath } from "node:url";
+// import { default as Zga } from "./lib/zganode.js";
+// const __dirname = m_path.dirname(fileURLToPath(import.meta.url));
+
+const m_fs = require("fs");
+const m_path = require("path");
+const Zga = require("./lib/zganode.js");
+
+const workpath = "test/";
+
+/**
+ * @param {string} pdfPath
+ * @param {string} pfxPath
+ * @param {string} ps
+ * @param {number} perm
+ * @param {string=} imgPath
+ * @param {string=} txt
+ * @param {string=} fontPath
+ * @return {Promise<string>} output path
+ */
+async function sign_protect(pdfPath, pfxPath, ps, perm, imgPath, txt, fontPath){
+	/** @type {Buffer} */
+	var pdf = m_fs.readFileSync(pdfPath);
+	/** @type {Buffer} */
+	var pfx = m_fs.readFileSync(pfxPath);
+	/** @type {Buffer} */
+	var img = null;
+	/** @type {string} */
+	var imgType = "";
+	/** @type {Buffer|string} */
+	var font = null;
+
+	if(perm == 1){
+		console.log("\nTest signing pdf with full protection. (permission 1 and password encryption)");
+	}else{
+		console.log("\nTest signing pdf with permission "+perm);
+	}
+
+	if(imgPath){
+		img = m_fs.readFileSync(imgPath);
+		imgType = m_path.extname(imgPath).slice(1);
+	}
+	if(fontPath){
+		if(Zga.PDFLib.isStandardFont(fontPath)){
+			font = fontPath;
+		}else{
+			font = m_fs.readFileSync(fontPath);
+		}
+	}
+	/** @type {SignOption} */
+	var sopt = {
+		p12cert: pfx,
+		pwd: ps,
+		permission: perm,
+		signdate: "1",
+		reason: "I have a test reason "+perm+".",
+		location: "I am on the earth "+perm+".",
+		contact: "zga"+perm+"@zga.com",
+		ltv: 1,
+		debug: true,
+	};
+	if(img || txt){
+		sopt.drawinf = {
+			area: {
+				x: perm ? 25 : 200, // left
+				y: 50, // top
+				w: txt ? undefined : 60,
+				h: txt ? undefined : 100,
+			},
+			pageidx: "-",
+			imgInfo: img ? {
+				imgData: img,
+				imgType: imgType,
+			} : undefined,
+			textInfo: txt ? {
+				text: txt,
+				fontData: font,
+				color: "00f0f1",
+				lineHeight: 20,
+				size: 16,
+				align: 1,
+				wMax: 80,
+				yOffset: 10,
+				xOffset: 20,
+				noBreaks: "[あいうえおA-Za-z0-9]",
+			} : undefined,
+		};
+	}
+
+	/** @type {EncryptOption} */
+	var eopt = undefined;
+	if(perm == 1){
+		eopt = {
+			mode: Zga.Crypto.Mode.AES_256,
+			permissions: ["copy", "copy-extract", "print-high"],
+			userpwd: "123",
+		};
+	}
+
+	/** @type {Zga.PdfSigner} */
+	var ser = new Zga.PdfSigner(sopt);
+	/** @type {Uint8Array} */
+	var u8dat = await ser.sign(pdf, eopt);
+	if(u8dat){
+		/** @type {string} */
+		var outPath = m_path.join(__dirname, workpath+"test_perm"+perm+m_path.basename(pdfPath));
+		m_fs.writeFileSync(outPath, u8dat);
+		console.log("Output file: " + outPath);
+	}
+	return outPath;
+}
+
+/**
+ * @param {string} pdfPath
+ * @return {Promise<string>} output path
+ */
+async function addtsa(pdfPath){
+	console.log("\nTest signing pdf by a timestamp.");
+
+	/** @type {Buffer} */
+	var pdf = m_fs.readFileSync(pdfPath);
+	/** @type {SignOption} */
+	var sopt = {
+		signdate: "2",
+		reason: "I have a test reason tsa.",
+		location: "I am on the earth tsa.",
+		contact: "zgatsa@zga.com",
+		ltv: 1,
+		debug: true,
+	};
+	/** @type {Zga.PdfSigner} */
+	var ser = new Zga.PdfSigner(sopt);
+	/** @type {Uint8Array} */
+	var u8dat = await ser.sign(pdf);
+	/** @type {string} */
+	var outPath = m_path.join(__dirname, workpath+"tsa_"+m_path.basename(pdfPath));
+	m_fs.writeFileSync(outPath, u8dat);
+	console.log("Output file: " + outPath);
+	return outPath;
+}
+
+/**
+ * @param {number} angle
+ */
+async function main1(angle){
+	/** @type {string} */
+	var pdfPath = m_path.join(__dirname, workpath+"_test"+(angle ? "_"+angle : "")+".pdf");
+	/** @type {string} */
+	var pfxPath = m_path.join(__dirname, workpath+"_test.pfx");
+	/** @type {string} */
+	var ps = "";
+	/** @type {string} */
+	var imgPath = m_path.join(__dirname, workpath+"_test.png");
+	/** @type {string} */
+	var fontPath = m_path.join(__dirname, workpath+"_test.ttf");
+	// var fontPath = Zga.PDFLib.StandardFonts.CourierBold;
+
+	if(process.argv.length > 3){
+		pfxPath = process.argv[2];
+		ps = process.argv[3];
+	}else if(process.argv[2]){
+		ps = process.argv[2];
+	}
+
+	if(!ps){
+		// throw new Error("The passphrase is not specified.");
+		pfxPath = "";
+	}
+
+	if(pfxPath){
+		await sign_protect(pdfPath, pfxPath, ps, 1, imgPath, "あいうえおあいうえおか\r\n\nThis is a test of text!\n");
+		if(Zga.PDFLib.isStandardFont(fontPath)){
+			pdfPath = await sign_protect(pdfPath, pfxPath, ps, 2, imgPath, "This is an another test of text!\n", fontPath);
+			pdfPath = await sign_protect(pdfPath, pfxPath, ps, 0, undefined, "This is a test for same font!\n", fontPath);
+		}else{
+			pdfPath = await sign_protect(pdfPath, pfxPath, ps, 2, imgPath, "ありがとうご\r\nThis is an another test of text!\n", fontPath);
+			pdfPath = await sign_protect(pdfPath, pfxPath, ps, 0, undefined, "たちつてと\n\nThis is a test for same font!\n", fontPath);
+		}
+		await addtsa(pdfPath);
+	}else{
+		await addtsa(pdfPath);
+	}
+
+	console.log("Done");
+}
+
+async function main(){
+	/** @type {Array<number>} */
+	var arr = [0, 90, 180, 270];
+	/** @type {number} */
+	for(var i=0; i<arr.length; i++){
+		await main1(arr[i]);
+		// break;
+	}
+}
+
+main();
--- a/zgapdfsigner.js
+++ b/zgapdfsigner.js
@ -1,482 +0,0 @@
-'use strict';
-
-globalThis.Zga = {
-
-PdfSigner: class {
-	/**
-	 * @constructor
-	 * @param {SignOption} signopt
-	 */
-	constructor(signopt){
-		/** @private @type {SignOption} */
-		this.opt = signopt;
-	}
-
-	/**
-	 * @public
-	 * @param {PDFLib.PDFDocument|Uint8Array|ArrayBuffer|string} pdf
-	 * @return {Promise<Uint8Array>}
-	 */
-	async sign(pdf){
-		/** @type {PDFLib.PDFDocument} */
-		var pdfdoc = null;
-		if(pdf.addPage){
-			pdfdoc = pdf;
-		}else{
-			pdfdoc = await PDFLib.PDFDocument.load(pdf);
-		}
-
-		if(this.opt.drawinf && this.opt.drawinf.imgData && !this.opt.drawinf.img){
-			if(this.opt.drawinf.imgType == "png"){
-				this.opt.drawinf.img = await pdfdoc.embedPng(this.opt.drawinf.imgData);
-			}else if(this.opt.drawinf.imgType == "jpg"){
-				this.opt.drawinf.img = await pdfdoc.embedJpg(this.opt.drawinf.imgData);
-			}else{
-				throw new Error("Unkown image type. " + this.opt.drawinf.imgType);
-			}
-		}
-
-		this.addSignHolder(pdfdoc);
-		var uarr = await pdfdoc.save({"useObjectStreams": false});
-		var pdfstr = Zga.u8arrToRaw(uarr);
-
-		return this.signPdf(pdfstr);
-	}
-
-	/**
-	 * @private
-	 * @param {PDFLib.PDFDocument} pdfdoc
-	 */
-	addSignHolder(pdfdoc){
-		/** @const {string} */
-		const DEFAULT_BYTE_RANGE_PLACEHOLDER = "**********";
-		/** @const {number} */
-		const SIGNATURE_LENGTH = 3322;
-
-		/** @const {VisualSignature} */
-		const visign = new Zga.VisualSignature(this.opt.drawinf);
-		/** @const {PDFLib.PDFRef} */
-		const strmRef = visign.createStream(pdfdoc, this.opt.signame);
-		/** @const {PDFLib.PDFPage} */
-		const page = pdfdoc.getPages()[visign.getPageIndex()];
-
-		if(!this.opt.signdate){
-			this.opt.signdate = new Date();
-		}
-
-		/** @type {PDFLib.PDFArray} */
-		var bytrng = new PDFLib.PDFArray(pdfdoc.context);
-		bytrng.push(PDFLib.PDFNumber.of(0));
-		bytrng.push(PDFLib.PDFName.of(DEFAULT_BYTE_RANGE_PLACEHOLDER));
-		bytrng.push(PDFLib.PDFName.of(DEFAULT_BYTE_RANGE_PLACEHOLDER));
-		bytrng.push(PDFLib.PDFName.of(DEFAULT_BYTE_RANGE_PLACEHOLDER));
-
-		/** @type {Object<string, *>} */
-		var signObj = {
-			"Type": "Sig",
-			"Filter": "Adobe.PPKLite",
-			"SubFilter": "adbe.pkcs7.detached",
-			"ByteRange": bytrng,
-			"Contents": PDFLib.PDFHexString.of("0".repeat(SIGNATURE_LENGTH)),
-			"M": PDFLib.PDFString.fromDate(this.opt.signdate),
-			"Prop_Build": pdfdoc.context.obj({
-				"App": pdfdoc.context.obj({
-					"Name": "ZgaPdfSinger",
-				}),
-			}),
-		};
-		if(this.opt.reason){
-			signObj["Reason"] = PDFLib.PDFString.of(this.opt.reason);
-		}
-		if(this.opt.location){
-			signObj["Location"] = PDFLib.PDFString.of(this.opt.location);
-		}
-		if(this.opt.contact){
-			signObj["ContactInfo"] = PDFLib.PDFString.of(this.opt.contact);
-		}
-		var signatureDictRef = pdfdoc.context.register(pdfdoc.context.obj(signObj));
-
-		/** @type {Object<string, *>} */
-		var widgetObj = {
-			"Type": "Annot",
-			"Subtype": "Widget",
-			"FT": "Sig",
-			"Rect": visign.getSignRect(),
-			"V": signatureDictRef,
-			"T": PDFLib.PDFString.of(this.opt.signame ? this.opt.signame : "Signature1"),
-			"F": 132,
-			"P": page.ref,
-		};
-		if(strmRef){
-			widgetObj["AP"] = pdfdoc.context.obj({
-				"N": strmRef,
-			});
-		}
-		var widgetDictRef = pdfdoc.context.register(pdfdoc.context.obj(widgetObj));
-
-		// Add our signature widget to the page
-		page.node.set(PDFLib.PDFName.of("Annots"), pdfdoc.context.obj([widgetDictRef]));
-
-		// Create an AcroForm object containing our signature widget
-		pdfdoc.catalog.set(
-			PDFLib.PDFName.of("AcroForm"),
-			pdfdoc.context.obj({
-				"SigFlags": 3,
-				"Fields": [widgetDictRef],
-			}),
-		);
-	}
-
-	/**
-	 * @private
-	 * @param {string} pdfstr
-	 * @return {Uint8Array}
-	 */
-	signPdf(pdfstr){
-		if(!this.opt.signdate){
-			this.opt.signdate = new Date();
-		}
-
-		// Finds ByteRange information within a given PDF Buffer if one exists
-		var byteRangeStrings = pdfstr.match(/\/ByteRange\s*\[{1}\s*(?:(?:\d*|\/\*{10})\s+){3}(?:\d+|\/\*{10}){1}\s*]{1}/g);
-		var byteRangePlaceholder = byteRangeStrings.find(function(a_str){
-			return a_str.includes("/**********");
-		});
-		if(!byteRangePlaceholder){
-			throw new Error("no signature placeholder");
-		}
-		var byteRangePos = pdfstr.indexOf(byteRangePlaceholder);
-		var byteRangeEnd = byteRangePos + byteRangePlaceholder.length;
-		var contentsTagPos = pdfstr.indexOf('/Contents ', byteRangeEnd);
-		var placeholderPos = pdfstr.indexOf('<', contentsTagPos);
-		var placeholderEnd = pdfstr.indexOf('>', placeholderPos);
-		var placeholderLengthWithBrackets = placeholderEnd + 1 - placeholderPos;
-		var placeholderLength = placeholderLengthWithBrackets - 2;
-		var byteRange = [0, 0, 0, 0];
-		byteRange[1] = placeholderPos;
-		byteRange[2] = byteRange[1] + placeholderLengthWithBrackets;
-		byteRange[3] = pdfstr.length - byteRange[2];
-		var actualByteRange = "/ByteRange [" + byteRange.join(" ") +"]";
-		actualByteRange += ' '.repeat(byteRangePlaceholder.length - actualByteRange.length);
-		// Replace the /ByteRange placeholder with the actual ByteRange
-		pdfstr = pdfstr.slice(0, byteRangePos) + actualByteRange + pdfstr.slice(byteRangeEnd);
-		// Remove the placeholder signature
-		pdfstr = pdfstr.slice(0, byteRange[1]) + pdfstr.slice(byteRange[2], byteRange[2] + byteRange[3]);
-
-		if(typeof this.opt.p12cert !== "string"){
-			this.opt.p12cert = Zga.u8arrToRaw(new Uint8Array(this.opt.p12cert));
-		}
-		// Convert Buffer P12 to a forge implementation.
-		var p12Asn1 = forge.asn1.fromDer(this.opt.p12cert);
-		var p12 = forge.pkcs12.pkcs12FromAsn1(p12Asn1, true, this.opt.pwd);
-
-		// Extract safe bags by type.
-		// We will need all the certificates and the private key.
-		var certBags = p12.getBags({
-			"bagType": forge.pki.oids.certBag,
-		})[forge.pki.oids.certBag];
-		var keyBags = p12.getBags({
-			"bagType": forge.pki.oids.pkcs8ShroudedKeyBag,
-		})[forge.pki.oids.pkcs8ShroudedKeyBag];
-
-		var privateKey = keyBags[0].key;
-		// Here comes the actual PKCS#7 signing.
-		var p7 = forge.pkcs7.createSignedData();
-		// Start off by setting the content.
-		p7.content = forge.util.createBuffer(pdfstr);
-
-		// Then add all the certificates (-cacerts & -clcerts)
-		// Keep track of the last found client certificate.
-		// This will be the public key that will be bundled in the signature.
-		var cert = null;
-		Object.keys(certBags).forEach(function(a_ele){
-			var a_cert = certBags[a_ele].cert;
-
-			p7.addCertificate(a_cert);
-
-			// Try to find the certificate that matches the private key.
-			if(privateKey.n.compareTo(a_cert.publicKey.n) === 0
-			&& privateKey.e.compareTo(a_cert.publicKey.e) === 0){
-				cert = a_cert;
-			}
-		});
-		if(!cert){
-			throw new Error("Failed to find a certificate.");
-		}
-
-		// Add a sha256 signer. That's what Adobe.PPKLite adbe.pkcs7.detached expects.
-		p7.addSigner({
-			key: privateKey,
-			certificate: cert,
-			digestAlgorithm: forge.pki.oids.sha256,
-			authenticatedAttributes: [
-				{
-					"type": forge.pki.oids.contentType,
-					"value": forge.pki.oids.data,
-				}, {
-					"type": forge.pki.oids.messageDigest,
-				}, {
-					"type": forge.pki.oids.signingTime,
-					"value": this.opt.signdate,
-				},
-			],
-		});
-
-		// Sign in detached mode.
-		p7.sign({"detached": true});
-		// Check if the PDF has a good enough placeholder to fit the signature.
-		var sighex = forge.asn1.toDer(p7.toAsn1()).toHex();
-		// placeholderLength represents the length of the HEXified symbols but we're
-		// checking the actual lengths.
-		if(sighex.length > placeholderLength){
-			throw new Error("Signature is too big.");
-		}else{
-			// Pad the signature with zeroes so the it is the same length as the placeholder
-			sighex += "0".repeat(placeholderLength - sighex.length);
-		}
-		// Place it in the document.
-		pdfstr = pdfstr.slice(0, byteRange[1]) + "<" + sighex + ">" + pdfstr.slice(byteRange[1]);
-
-		return Zga.rawToU8arr(pdfstr);
-	}
-},
-
-VisualSignature: class {
-	/**
-	 * @constructor
-	 * @param {SignDrawInfo=} drawinf
-	 */
-	constructor(drawinf){
-		/** @private @type {number} */
-		this.pgidx = 0;
-		/** @private @type {Array<number>} */
-		this.rect = [0, 0, 0, 0];
-		/** @private @type {SignDrawInfo} */
-		this.drawinf = null;
-
-		if(drawinf){
-			this.drawinf = drawinf;
-			if(this.drawinf.pageidx){
-				this.pgidx = this.drawinf.pageidx;
-			}
-		}
-	}
-
-	/**
-	 * @public
-	 * @return {number}
-	 */
-	getPageIndex(){
-		return this.pgidx;
-	}
-
-	/**
-	 * @public
-	 * @return {Array<number>}
-	 */
-	getSignRect(){
-		return this.rect;
-	}
-
-	/**
-	 * @public
-	 * @param {PDFLib.PDFDocument} pdfdoc
-	 * @param {string=} signame
-	 * @return {PDFLib.PDFRef} The unique reference assigned to the signature stream
-	 */
-	createStream(pdfdoc, signame){
-		if(!this.drawinf){
-			return null;
-		}else if(!(this.drawinf.img || (this.drawinf.font && this.drawinf.font))){
-			return null;
-		}
-
-		/** @type {Array<PDFLib.PDFPage>} */
-		var pages = pdfdoc.getPages();
-		/** @type {PDFLib.PDFPage} */
-		var page = null;
-		if(this.pgidx < pages.length){
-			page = pages[this.pgidx];
-		}else{
-			throw new Error("Page index is overflow to pdf pages.");
-		}
-		var pgrot = page.getRotation();
-		pgrot.angle = PDFLib.toDegrees(pgrot) % 360;
-		pgrot.type = PDFLib.RotationTypes.Degrees;
-		var pgsz = page.getSize();
-		var areainf = this.calcAreaInf(pgsz, pgrot.angle, this.drawinf.area);
-
-		// resources object
-		var rscObj = {};
-		/** @type {Array<PDFLib.PDFOperator>} */
-		var sigOprs = [];
-		var imgName = signame ? signame.concat("Img") : "SigImg";
-		var fontName = signame ? signame.concat("Font") : "SigFont";
-		if(this.drawinf.img){
-			// Get scaled image size
-			var imgsz = this.drawinf.img.size();
-			var tmp = areainf.w * imgsz.height / imgsz.width;
-			if(tmp <= areainf.h){
-				areainf.h = tmp;
-			}else{
-				areainf.w = areainf.h * imgsz.width / imgsz.height;
-			}
-
-			rscObj["XObject"] = {
-				[imgName]: this.drawinf.img.ref,
-			};
-			sigOprs = sigOprs.concat(PDFLib.drawImage(imgName, this.calcDrawImgInf(pgrot, areainf)));
-		}
-		if(this.drawinf.font){
-			rscObj["Font"] = {
-				[fontName]: this.drawinf.font.ref,
-			};
-		}
-
-		this.rect = this.calcRect(pgrot.angle, areainf);
-
-		var frmDict = pdfdoc.context.obj({
-			"Type": "XObject",
-			"Subtype": "Form",
-			"FormType": 1,
-			"BBox": [0, 0, areainf.w, areainf.h],
-			"Resources": rscObj,
-		});
-		var strm = PDFLib.PDFContentStream.of(frmDict, sigOprs, false);
-		return pdfdoc.context.register(strm);
-	}
-
-	/**
-	 * Calculate area informations for drawing signature after rotate
-	 *
-	 * @private
-	 * @param {Object<string, number>} pgsz // { width, height }
-	 * @param {number} angle
-	 * @param {SignAreaInfo} visinf
-	 * @return {SignAreaInfo}
-	 */
-	calcAreaInf(pgsz, angle, visinf){
-		var ret = Object.assign({}, visinf);
-		// Calculate position after rotate
-		switch(angle){
-		case 90:
-			ret.w = visinf.h;
-			ret.h = visinf.w;
-			ret.x = visinf.y;
-			ret.y = visinf.x;
-			break;
-		case 180:
-		case -180:
-			ret.x = pgsz.width - visinf.x;
-			break;
-		case 270:
-		case -90:
-			ret.w = visinf.h;
-			ret.h = visinf.w;
-			ret.x = pgsz.width - visinf.y;
-			ret.y = pgsz.height - visinf.x;
-			break;
-		default:
-			ret.y = pgsz.height - visinf.y;
-		}
-		return ret;
-	}
-
-	/**
-	 * @private
-	 * @param {number} angle
-	 * @param {SignAreaInfo} areainf // { x, y, w, h }
-	 * @return {Array<number>}
-	 */
-	calcRect(angle, areainf){
-		var rect = [0, 0, 0, 0];
-		rect[0] = areainf.x;
-		rect[1] = areainf.y;
-		switch(angle){
-		case 90:
-			rect[2] = areainf.x - areainf.h;
-			rect[3] = areainf.y + areainf.w;
-			break;
-		case 180:
-		case -180:
-			rect[2] = areainf.x - areainf.w;
-			rect[3] = areainf.y - areainf.h;
-			break;
-		case 270:
-		case -90:
-			rect[2] = areainf.x + areainf.h;
-			rect[3] = areainf.y - areainf.w;
-			break;
-		default:
-			rect[2] = areainf.x + areainf.w;
-			rect[3] = areainf.y + areainf.h;
-		}
-		return rect;
-	}
-
-	/**
-	 * Calculate informations for drawing image after rotate
-	 *
-	 * @private
-	 * @param {PDFLib.Rotation} rot
-	 * @param {SignAreaInfo} areainf // { x, y, w, h }
-	 * @return {Object<string, *>} // { x, y, width, height, rotate, xSkew, ySkew }
-	 */
-	calcDrawImgInf(rot, areainf){
-		var ret = {
-			"x": 0,
-			"y": 0,
-			"width": areainf.w,
-			"height": areainf.h,
-			"rotate": rot,
-			"xSkew": PDFLib.degrees(0),
-			"ySkew": PDFLib.degrees(0),
-		};
-		switch(rot.angle){
-		case 90:
-			ret["x"] = areainf.w;
-			ret["width"] = areainf.h;
-			ret["height"] = areainf.w;
-			break;
-		case 180:
-		case -180:
-			ret["x"] = areainf.w;
-			ret["y"] = areainf.h;
-			break;
-		case 270:
-		case -90:
-			ret["y"] = areainf.h;
-			ret["width"] = areainf.h;
-			ret["height"] = areainf.w;
-			break;
-		}
-		return ret;
-	}
-},
-
-/**
- * @param {Uint8Array} uarr
- * @return {string}
- */
-u8arrToRaw: function(uarr){
-	/** @type {Array<string>} */
-	var arr = [];
-	for(var i=0; i<uarr.length; i++){
-		arr.push(String.fromCharCode(uarr[i]));
-	}
-	return arr.join("");
-},
-
-/**
- * @param {string} raw
- * @return {Uint8Array}
- */
-rawToU8arr: function(raw){
-	var arr = new Uint8Array(raw.length);
-	for(var i=0; i<raw.length; i++){
-		arr[i] = raw.charCodeAt(i);
-	}
-	return arr;
-},
-
-};
Author	SHA1	Message	Date
zboris12	0d39f569ae	Changed to allow TSA feature in web browser	2024-08-24 12:17:43 +09:00
zboris12	e5372e2652	Added explanation of simulating clearTimeout function.	2024-08-19 21:54:15 +09:00
zboris12	9706bfe31a	Improved to support font subsetting and changed to use pdf-fontkit.	2024-08-19 21:33:38 +09:00
zboris12	4def4068f7	Improved to reuse the font if it is already embedded in the PDF.	2024-08-18 21:32:27 +09:00
zboris12	1f92ca61d7	Added support for typescript development.	2024-08-17 11:51:46 +09:00
zboris12	e1ed49d43f	Made comment more accurate.	2024-08-10 20:34:50 +09:00
zboris12	de687d8bf7	Fixed a bug of break line.	2024-08-10 20:12:19 +09:00
zboris12	0505fd1e0e	Working on text signature and placing on multiple pages.	2024-08-09 21:57:20 +09:00
zboris12	fd2b97d5b3	Working on text signature.	2024-08-04 20:07:21 +09:00
zboris12	fa4eb2d5c0	Changed the minimized js URL described in readme to jsdelivr.net	2024-04-22 21:19:54 +09:00
zboris12	cc045171da	Fixed the abnormal display of some icons in readme and the autofix by npm publish in package.json	2024-04-21 12:22:31 +09:00
zboris12	90474e9393	Changed verion of follow-redirects to 1.15.6	2024-04-21 11:45:42 +09:00
zboris12	0473f700a1	Changed position of badges.	2024-03-24 21:37:31 +09:00
zboris12	8417fad06b	Added some badges to readme.	2024-03-24 21:33:56 +09:00
zboris12	3216d917ed	Added to show build result after github-actions. Again.	2024-03-24 20:51:44 +09:00
zboris12	9a47c162aa	Made build.sh easier to read.	2024-03-24 20:46:49 +09:00
zboris12	d5b9c4ad22	Added to show build result after github-actions.	2024-03-24 18:47:08 +09:00
zboris12	201e5a99b9	Fixed build error of "Syntax error: redirection unexpected".	2024-03-24 18:44:00 +09:00
zboris12	2c8de1a007	Fixed "Permission denied" on github-actions.	2024-03-24 18:22:01 +09:00
zboris12	f4cbbcdb7c	Changed google compile method from java to npx.	2024-03-24 18:15:37 +09:00
zboris12	d6d6d23dfb	Merge pull request #2 from bounsel/main Fix EU signature. Thanks marsanla!	2023-09-19 12:08:49 +09:00
Marcos Sanz	e6361df479	Add name to signature	2023-02-27 07:05:24 +01:00
Marcos Sanz	30727cafc3	Update version	2023-02-24 14:34:22 +01:00
Marcos Sanz	8ca688b8c5	fix: remove vscode folder	2023-02-24 12:52:43 +01:00
Marcos Sanz	e37d5b1ce1	fix(node): added pkg follow-redirects Added follow-redirects package to allow the urlFetch function to follow the redirect that some cert providers has. For example: http://www.accv.es/gestcert/ACCVCA120SHA2.cacert.crt	2023-02-24 12:51:21 +01:00
Marcos Sanz	202edbc768	Fix EU signature Fix signature to have a check in: Is the signature intact?	2023-02-24 12:09:38 +01:00
zboris12	4136451365	Changed link of wiki to an absolute path since the relative path didn't work.	2022-11-23 18:09:17 +09:00
zboris12	5494783141	Deleted unnecessary informations in readme since wiki has been created.	2022-11-23 17:57:42 +09:00
zboris12	9210c41068	Supported to enable LTV, and made to publish on npm.	2022-11-19 19:52:06 +09:00
zboris12	dd52e4e8be	Working on LTV, Completeness is 90%.	2022-11-14 22:20:19 +09:00
zboris12	3f0dd0af9f	Changed folder structure and working on LTV.	2022-11-06 18:03:48 +09:00
zboris12	8b008ccc34	Added support to add a document timestamp from a TSA.	2022-10-24 21:36:47 +09:00
zboris12	528eaad5eb	Added support run in node js.	2022-10-22 18:42:13 +09:00
zboris12	22f6628584	Added support to add a signature to a pdf which has already been signed.	2022-10-20 21:28:27 +09:00
zboris12	5c9ac474b5	Fixed a minor bug.	2022-10-15 22:06:13 +09:00
zboris12	fe2fd4840d	Added support to DocMDP and improved the way of appending TSA timestamp.	2022-10-14 21:12:43 +09:00
zboris12	adc260b794	Improved the readme.	2022-10-06 22:18:07 +09:00
zboris12	299aeb3419	Added support to public-key certificate encryption.	2022-10-06 22:02:11 +09:00
zboris12	14ad61b5cf	Fixed the url in readme.	2022-10-04 21:50:22 +09:00
zboris12	c4e5dafa17	Made js files to compiled by closure compiler.	2022-10-04 21:43:00 +09:00
zboris12	8c2a614a08	Added functions of setting protection to a pdf.	2022-10-02 21:45:06 +09:00
zboris12	8fbedd2c8a	Fixed the wrong calculation of signature's y position and the broken signature issue.	2022-10-01 17:20:53 +09:00
zboris12	f932a2bb2a	Added support to sign with TSA.	2022-09-24 13:59:30 +09:00
zboris12	b72d38473a	Fix garbled multi-bytes characters in the properties of the signature.	2022-09-19 11:53:54 +09:00