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
15 changed files with 505 additions and 454 deletions
--- a/README.md
+++ b/README.md
@ -18,9 +18,9 @@ And I use this name to hope the merits from this application will be dedicated t
 * 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)
-* Sign a pdf with a timestamp from [TSA](https://github.com/zboris12/zgapdfsigner/wiki/API#note). ( :no_entry_sign:__Not__ available in web browser)
-* Enable signature's [LTV](https://github.com/zboris12/zgapdfsigner/wiki/API#note). ( :no_entry_sign:__Not__ available in web browser)
+* 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
@ -33,12 +33,16 @@ And I use this name to hope the merits from this application will be dedicated t

 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

@ -51,10 +55,12 @@ Just import the dependencies and this tool.
 <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 by non-standard font, importing the fontkit library is necessary.
+When drawing text for signature, importing fontkit and pako library is necessary.
 ```html
-<script src="https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.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>
 ```
+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.
@ -64,12 +70,18 @@ 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 by non-standard font.
-eval(UrlFetchApp.fetch("https://unpkg.com/@pdf-lib/fontkit/dist/fontkit.umd.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
--- a/build.sh
+++ b/build.sh
@ -9,6 +9,8 @@ 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=""
@ -20,7 +22,12 @@ do
 		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}"
@ -32,6 +39,7 @@ do
 		fi
 	fi
 done <<EOF
+zgafetch.js
 zgacertsutil.js
 zgapdfcryptor.js
 zgapdfsigner.js
--- a/closure/pdflib-ext.js
+++ b/closure/pdflib-ext.js
@ -9,7 +9,17 @@
 var PdfLoadOptions;

 /** @const */
-var fontkit = {};
+var pako = {};
+/**
+ * @param {Uint8Array} input
+ * @return {Uint8Array}
+ */
+pako.inflate = function(input){};
+
+/** @constructor */
+var Fontkit = function(){};
+/** @const {Fontkit} */
+var fontkit;

 /** @const */
 var PDFLib = {};
@ -41,6 +51,11 @@ PDFLib.lineSplit = function(text){};
 * @return {boolean}
 */
 PDFLib.isNewlineChar = function(text){};
+/**
+ * @param {string} fntnm
+ * @return {boolean}
+ */
+PDFLib.isStandardFont = function(fntnm){};

 /** @constructor */
 PDFLib.PDFDocument = function(){};
@ -105,7 +120,7 @@ PDFLib.PDFDocument.prototype.embedFont = function(font, options){};
 */
 PDFLib.PDFDocument.prototype.embedStandardFont = function(font, customName){};
 /**
- * @lends {fontkit} fkt
+ * @param {Fontkit} fkt
 */
 PDFLib.PDFDocument.prototype.registerFontkit = function(fkt){};
 /**
@ -316,6 +331,8 @@ PDFLib.PDFName.Annots;
 * @return {PDFLib.PDFName}
 */
 PDFLib.PDFName.of = function(value){};
+/** @return {string} */
+PDFLib.PDFName.prototype.asString = function(){};
 /** @type {string} */
 PDFLib.PDFName.prototype.encodedName;
 /** @type {number} */
@ -338,10 +355,20 @@ PDFLib.PDFArray.prototype.push = function(object){};
 * @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
@ -403,8 +430,34 @@ 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} */
@ -540,6 +593,12 @@ PDFLib.PDFContentStream.of = function(dict, operators, encode){};
 * @extends {PDFLib.PDFStream}
 */
 PDFLib.PDFRawStream = function(){};
+/** @type {PDFLib.PDFDict} */
+PDFLib.PDFRawStream.prototype.dict;
+/**
+ * @return {Uint8Array}
+ */
+PDFLib.PDFRawStream.prototype.getContents = function(){};

 /**
 * @constructor
--- a/closure/zb-externs.js
+++ b/closure/zb-externs.js
@ -36,6 +36,7 @@ var SignAreaInfo;
 * {{
 *    text: string,
 *    fontData: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
+ *    subset: (boolean|undefined),
 *    color: (string|undefined),
 *    opacity: (number|undefined),
 *    blendMode: (string|undefined),
--- 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
@ -5,14 +5,16 @@
 */
 function genZga(){
 	/** @const {Object<string, *>} */
-	const z = {};
+	const z = {
+		ver: "",
+	};

 	/**
-	 * @param {string} msg
+	 * @param {...string} msg
 	 */
-	z.log = function(msg){
+	z.log = function(...msg){
 		if(z.debug){
-			console.log(msg);
+			console.log(...msg);
 		}
 	};

@ -42,22 +44,6 @@ function genZga(){
 		return arr;
 	};

-	// Google Apps Script
-	if(globalThis.UrlFetchApp){
-		/**
-		 * @param {string} url
-		 * @param {UrlFetchParams} params
-		 * @return {Promise<Uint8Array>}
-		 */
-		z.urlFetch = function(url, params){
-			return new Promise(function(resolve){
-				/** @type {GBlob} */
-				var tblob = UrlFetchApp.fetch(url, params).getBlob();
-				resolve(new Uint8Array(tblob.getBytes()));
-			});
-		};
-	}
-
 	return z;
 }

@ -68,6 +54,7 @@ if(typeof exports === "object" && typeof module !== "undefined"){
 //Only for nodejs End//
 	if(!globalThis.Zga){
 		globalThis.Zga = genZga();
+		supplyZgaUrlFetch(globalThis.Zga);
 		supplyZgaCertsChain(globalThis.Zga);
 		supplyZgaCryptor(globalThis.Zga);
 		supplyZgaSigner(globalThis.Zga);
--- a/lib/zganode.d.ts
+++ b/lib/zganode.d.ts
@ -37,7 +37,8 @@ export type SignAreaInfo = {
 };
 export type SignTextInfo = {
  text: string,
-  fontData?: Array<number> | Uint8Array | ArrayBuffer | string;
+  fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts;
+  subset?: boolean;
  color?: string;
  opacity?: number;
  blendMode?: string;
@ -109,3 +110,8 @@ export declare class TsaFetcher {
  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
@ -6,70 +6,11 @@ const m_h = {
 const z = require("./zgaindex.js");
 z.forge = require("node-forge");
 z.PDFLib = require("pdf-lib");
-z.fontkit = require("@pdf-lib/fontkit");
-/**
- * @param {string} url
- * @param {UrlFetchParams} params
- * @return {Promise<Uint8Array>}
- */
-z.urlFetch = function(url, params){
-	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(/** @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(/** @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);
-	});
-};
+// 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);
--- a/lib/zgapdfsigner.js
+++ b/lib/zgapdfsigner.js
@ -15,6 +15,9 @@ if(z.PDFLib){
 if(z.fontkit){
 	var fontkit = z.fontkit;
 }
+if(z.pako){
+	var pako = z.pako;
+}
 //Only for nodejs End//

 /** @type {Object<string, TsaServiceInfo>} */
@ -243,6 +246,8 @@ z.PdfSigner = class{
 		this.oriU8pdf = null;
 		/** @private @type {Array<PdfObjEntry>} */
 		this.apobjs = null;
+		/** @private @type {z.PdfFonts} */
+		this.fonts = null;

 		if(typeof this.opt.debug == "boolean"){
 			z.debug = this.opt.debug;
@ -255,6 +260,9 @@ z.PdfSigner = class{
 		if(!(globalThis.forge || forge)){
 			throw new Error("node-forge is not imported.");
 		}
+		if(z.ver){
+			z.log("ZgaPdfSigner Version:", z.ver);
+		}
 		/** @type {?TsaServiceInfo} */
 		var tsainf = null;
 		if(signopt.signdate){
@ -268,11 +276,13 @@ z.PdfSigner = class{
 		}
 		if(tsainf){
 			if(!z.urlFetch){
-				throw new Error("Because of the CORS security restrictions, signing with TSA is not supported in web browser.");
+				// throw new Error("Because of the CORS security restrictions, signing with TSA is not supported in web browser.");
+				throw new Error("No fetch method found in this environment.");
 			}
 			if(z.TSAURLS[tsainf.url]){
 				Object.assign(tsainf, z.TSAURLS[tsainf.url]);
-			}else if(!(new RegExp("^https?://")).test(tsainf.url)){
+			}else if(!tsainf.url || (!z.isBrowser && !(new RegExp("^https?://")).test(tsainf.url))){
+				// It may be a relative path in browser environment, so only check in non-browser environment
 				throw new Error("Unknown tsa data. " + JSON.stringify(tsainf));
 			}
 			if(!tsainf.len){
@ -341,21 +351,8 @@ z.PdfSigner = class{
 		}

 		if(_this.opt.drawinf && _this.opt.drawinf.textInfo && !_this.opt.drawinf.font){
-			/** @type {Uint8Array|ArrayBuffer|string} */
-			var fontData2 = null;
-			if(Array.isArray(_this.opt.drawinf.textInfo.fontData)){
-				fontData2 = new Uint8Array(_this.opt.drawinf.textInfo.fontData);
-			}else if(_this.opt.drawinf.textInfo.fontData){
-				fontData2 = _this.opt.drawinf.textInfo.fontData;
-			}else{
-				fontData2 = "Helvetica";
-			}
-			if(typeof fontData2 == "string"){
-				_this.opt.drawinf.font = pdfdoc.embedStandardFont(fontData2);
-			}else{
-				pdfdoc.registerFontkit(fontkit);
-				_this.opt.drawinf.font = await pdfdoc.embedFont(fontData2);
-			}
+			_this.fonts = await z.PdfFonts.from(pdfdoc);
+			_this.opt.drawinf.font = await _this.fonts.getEmbeddedFont(_this.opt.drawinf.textInfo.fontData, _this.opt.drawinf.textInfo.subset);
 		}

 		/** @type {forge_cert} */
@ -1839,6 +1836,192 @@ z.SignatureCreator = class{
 	}
 };

+z.PdfFonts = class{
+	/**
+	 * @private
+	 * @param {PDFLib.PDFDocument} pdfdoc
+	 * @param {Array<FontInfo>} fonts
+	 */
+	constructor(pdfdoc, fonts){
+		/** @private @type {PDFLib.PDFDocument} */
+		this.doc = pdfdoc;
+		/** @private @type {Array<FontInfo>} */
+		this.fonts = fonts;
+	}
+
+	/**
+	 * @public
+	 * @param {PDFLib.PDFDocument} pdfdoc
+	 * @return {Promise<z.PdfFonts>}
+	 */
+	static async from(pdfdoc){
+		/**
+		 * @param {PDFLib.PDFDict} dict
+		 * @param {string} nm
+		 * @return {string|undefined}
+		 */
+		var lookupName = function(dict, nm){
+			var pnm = /** @type {PDFLib.PDFName} */(dict.lookupMaybe(PDFLib.PDFName.of(nm), PDFLib.PDFName));
+			if(pnm){
+				return pnm.asString();
+			}else{
+				return undefined;
+			}
+		};
+
+		/** @type Array<FontInfo> */
+		var fonts = [];
+		/** @type {Array<PdfObjEntry>} */
+		var objs = pdfdoc.context.enumerateIndirectObjects();
+		/** @type {number} */
+		var i = 0;
+		while(i < objs.length){
+			/** @type {PdfObjEntry} */
+			var poe = objs[i];
+			i++;
+
+			if(poe[1] instanceof PDFLib.PDFDict){
+				/** @type {string|undefined} */
+				var typ = lookupName(poe[1], "Type");
+				if(typ !== "/Font"){
+					continue;
+				}
+				/** @type {string|undefined} */
+				var fntnm = lookupName(poe[1], "BaseFont");
+				if(fntnm){
+					fntnm = fntnm.substring(1);
+					if(PDFLib.isStandardFont(fntnm)){
+						fonts.push({
+							font: PDFLib.PDFFont.of(poe[0], pdfdoc, PDFLib.StandardFontEmbedder.for(fntnm)),
+						});
+						continue;
+					}
+				}else{
+					continue;
+				}
+
+				var dfnts = /** @type {PDFLib.PDFArray} */(poe[1].lookupMaybe(PDFLib.PDFName.of("DescendantFonts"), PDFLib.PDFArray));
+				if(dfnts && dfnts.size()){
+					var fntdict = /** @type {PDFLib.PDFDict} */(dfnts.lookupMaybe(0, PDFLib.PDFDict));
+					if(fntdict){
+						var fntdesc = /** @type {PDFLib.PDFDict} */(fntdict.lookupMaybe(PDFLib.PDFName.of("FontDescriptor"), PDFLib.PDFDict));
+						if(fntdesc){
+							var rstm = /** @type {PDFLib.PDFRawStream} */(fntdesc.lookupMaybe(PDFLib.PDFName.of("FontFile2"), PDFLib.PDFRawStream));
+							if(rstm){
+								/** @type {Uint8Array} */
+								var fdat = rstm.getContents();
+								/** @type {string|undefined} */
+								var fltr = lookupName(rstm.dict, "Filter");
+								if(fltr == "/FlateDecode"){
+									fdat = pako.inflate(fdat);
+								}
+								try{
+									/** @type {PDFLib.CustomFontEmbedder} */
+									var emdr = await PDFLib.CustomFontEmbedder.for(fontkit, fdat);
+									fonts.push({
+										font: PDFLib.PDFFont.of(poe[0], pdfdoc, emdr),
+										data: fdat,
+									});
+								}catch(ex){
+									z.log(fntnm, ex.message);
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+
+		return new z.PdfFonts(pdfdoc, fonts);
+	}
+
+	/**
+	 * @public
+	 * @param {Array<number>|Uint8Array|ArrayBuffer|string|undefined} fontData
+	 * @param {boolean=} subset
+	 * @return {Promise<PDFLib.PDFFont>}
+	 */
+	async getEmbeddedFont(fontData, subset){
+		if(!fontData){
+			if(this.fonts.length){
+				z.log("Use existing default font.", this.fonts[0].font.name);
+				return this.fonts[0].font;
+			}else{
+				fontData = "Helvetica";
+				z.log("Use default font.", fontData);
+			}
+		}
+		if(typeof fontData == "string"){
+			return this.getStandardFont(fontData);
+		}else{
+			/** @type {Uint8Array} */
+			var u8dat = (fontData instanceof Uint8Array) ? fontData : new Uint8Array(fontData);
+			return await this.getCustomFont(u8dat, subset || false);
+		}
+	}
+
+	/**
+	 * @private
+	 * @param {string} fontData
+	 * @return {PDFLib.PDFFont}
+	 */
+	getStandardFont(fontData){
+		/** @type {number} */
+		var i = 0;
+		while(i < this.fonts.length){
+			/** @type {FontInfo} */
+			var fi = this.fonts[i];
+			i++;
+			if(!fi.data && fi.font.name == fontData){
+				z.log("Existing font found.", fi.font.name);
+				return fi.font;
+			}
+		}
+		return this.doc.embedStandardFont(fontData);
+	}
+	/**
+	 * @private
+	 * @param {Uint8Array} fontData
+	 * @param {boolean} subset
+	 * @return {Promise<PDFLib.PDFFont>}
+	 */
+	async getCustomFont(fontData, subset){
+		/** @type {number} */
+		var i = 0;
+		while(i < this.fonts.length){
+			/** @type {FontInfo} */
+			var fi = this.fonts[i];
+			i++;
+			if(fi.data && this.isSameData(fi.data, fontData)){
+				z.log("Existing font found.", fi.font.name);
+				return fi.font;
+			}
+		}
+		this.doc.registerFontkit(fontkit);
+		return await this.doc.embedFont(fontData, {subset});
+	}
+	/**
+	 * @private
+	 * @param {Uint8Array} dat1
+	 * @param {Uint8Array} dat2
+	 * @return {boolean}
+	 */
+	isSameData(dat1, dat2){
+		if(dat1.length != dat2.length){
+			return false;
+		}
+		/** @type {number} */
+		var i = 0;
+		while(i < dat1.length){
+			if(dat1[i] != dat2[i]){
+				return false;
+			}
+			i++;
+		}
+		return true;
+	}
+};
+
 /**
 * @typedef
 * {{
@ -1848,6 +2031,14 @@ z.SignatureCreator = class{
 * }}
 */
 var SplitLongWordResult;
+/**
+ * @typedef
+ * {{
+ *    font: PDFLib.PDFFont,
+ *    data: (Uint8Array|undefined),
+ * }}
+ */
+var FontInfo;

 }

--- a/package-lock.json
+++ b/package-lock.json
@ -1,31 +1,23 @@
 {
  "name": "zgapdfsigner",
-  "version": "2.5.2",
-  "lockfileVersion": 2,
+  "version": "2.7.2",
+  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "zgapdfsigner",
-      "version": "2.5.2",
+      "version": "2.7.2",
      "license": "MIT",
      "dependencies": {
-        "@pdf-lib/fontkit": "^1.1.1",
        "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/fontkit": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/@pdf-lib/fontkit/-/fontkit-1.1.1.tgz",
-      "integrity": "sha512-KjMd7grNapIWS/Dm0gvfHEilSyAmeLvrEGVcqLGi0VYebuqqzTbgF29efCx7tvx+IEbG3zQciRSWl3GkUSvjZg==",
-      "dependencies": {
-        "pako": "^1.0.6"
-      }
-    },
    "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",
@ -181,35 +173,6 @@
      "integrity": "sha512-E45cJD6/xLJlL8pL6HEoxu8nEKp87CnrojUK0UuHiT7ZjCsrJfR4WhZwNNCq2+/6gYD9unGgMsunV4DDtBbvaA==",
      "dev": true
    },
-    "node_modules/google-closure-compiler-linux": {
-      "version": "20231112.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-linux/-/google-closure-compiler-linux-20231112.0.0.tgz",
-      "integrity": "sha512-qi2DbqQ+OuZ4Mcp1EttmL4j3oqvXLPl8XREekkfdV651PXBNenoBG6EnzQIius7ESYVgmpbQE4Pw2wNhPudBBQ==",
-      "cpu": [
-        "x32",
-        "x64"
-      ],
-      "dev": true,
-      "optional": true,
-      "os": [
-        "linux"
-      ]
-    },
-    "node_modules/google-closure-compiler-osx": {
-      "version": "20231112.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-compiler-osx/-/google-closure-compiler-osx-20231112.0.0.tgz",
-      "integrity": "sha512-gNnlnVH4rVO5TyDhvqELzRc9Oydaxincj0QLsAQQkM0btBTUEEyFL1ACT00RgJKxrCTb5Lfa83DfU8ICJi5Ptw==",
-      "cpu": [
-        "x32",
-        "x64",
-        "arm64"
-      ],
-      "dev": true,
-      "optional": true,
-      "os": [
-        "darwin"
-      ]
-    },
    "node_modules/google-closure-compiler-windows": {
      "version": "20231112.0.0",
      "resolved": "https://registry.npmjs.org/google-closure-compiler-windows/-/google-closure-compiler-windows-20231112.0.0.tgz",
@ -267,6 +230,14 @@
      "resolved": "https://registry.npmjs.org/pako/-/pako-1.0.11.tgz",
      "integrity": "sha512-4hLB8Py4zZce5s4yd9XzopqwVv/yGNhV1Bl8NTmCq1763HeK2+EwVTv+leGeL13Dnh2wfbqowVPXCIO0z4taYw=="
    },
+    "node_modules/pdf-fontkit": {
+      "version": "1.8.9",
+      "resolved": "https://registry.npmjs.org/pdf-fontkit/-/pdf-fontkit-1.8.9.tgz",
+      "integrity": "sha512-TTq+umfhlFjUuQYOq6dCKT/wLslCrX4zVr5gqrIvrGHfo+vJ3ETapZTb4YLOCErohX7pF+HxlXSZuiToSRhNmA==",
+      "dependencies": {
+        "pako": "^1.0.6"
+      }
+    },
    "node_modules/pdf-lib": {
      "version": "1.17.1",
      "resolved": "https://registry.npmjs.org/pdf-lib/-/pdf-lib-1.17.1.tgz",
@ -387,290 +358,5 @@
        "source-map": "^0.5.1"
      }
    }
-  },
-  "dependencies": {
-    "@pdf-lib/fontkit": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/@pdf-lib/fontkit/-/fontkit-1.1.1.tgz",
-      "integrity": "sha512-KjMd7grNapIWS/Dm0gvfHEilSyAmeLvrEGVcqLGi0VYebuqqzTbgF29efCx7tvx+IEbG3zQciRSWl3GkUSvjZg==",
-      "requires": {
-        "pako": "^1.0.6"
-      }
-    },
-    "@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==",
-      "requires": {
-        "pako": "^1.0.6"
-      }
-    },
-    "@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==",
-      "requires": {
-        "pako": "^1.0.10"
-      }
-    },
-    "ansi-styles": {
-      "version": "4.3.0",
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-      "dev": true,
-      "requires": {
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-      }
-    },
-    "chalk": {
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-        "@pdf-lib/upng": "^1.0.1",
-        "pako": "^1.0.11",
-        "tslib": "^1.11.1"
-      }
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-    },
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-      "dev": true,
-      "requires": {
-        "core-util-is": "~1.0.0",
-        "inherits": "~2.0.3",
-        "isarray": "~1.0.0",
-        "process-nextick-args": "~2.0.0",
-        "safe-buffer": "~5.1.1",
-        "string_decoder": "~1.1.1",
-        "util-deprecate": "~1.0.1"
-      }
-    },
-    "remove-trailing-separator": {
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-      "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.14.1.tgz",
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-    },
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-      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
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-      "dev": true
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-    "vinyl": {
-      "version": "2.2.1",
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-      "integrity": "sha512-LII3bXRFBZLlezoG5FfZVcXflZgWP/4dCwKtxd5ky9+LOtM4CS3bIRQsmR1KMnMW07jpE8fqR2lcxPZ+8sJIcw==",
-      "dev": true,
-      "requires": {
-        "clone": "^2.1.1",
-        "clone-buffer": "^1.0.0",
-        "clone-stats": "^1.0.0",
-        "cloneable-readable": "^1.0.0",
-        "remove-trailing-separator": "^1.0.1",
-        "replace-ext": "^1.0.0"
-      }
-    },
-    "vinyl-sourcemaps-apply": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/vinyl-sourcemaps-apply/-/vinyl-sourcemaps-apply-0.2.1.tgz",
-      "integrity": "sha512-+oDh3KYZBoZC8hfocrbrxbLUeaYtQK7J5WU5Br9VqWqmCll3tFJqKp97GC9GmMsVIL0qnx2DgEDVxdo5EZ5sSw==",
-      "dev": true,
-      "requires": {
-        "source-map": "^0.5.1"
-      }
-    }
  }
 }
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
  "name": "zgapdfsigner",
-  "version": "2.7.0",
+  "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",
@ -14,6 +14,7 @@
  },
  "license": "MIT",
  "main": "lib/zganode.js",
+  "unpkg": "dist/zgapdfsigner.min.js",
  "files": [
    "dist/*.min.js",
    "lib/*.d.ts",
@ -34,9 +35,9 @@
    "test": "node test4node.js ${pfxpwd}"
  },
  "dependencies": {
-    "@pdf-lib/fontkit": "^1.1.1",
    "follow-redirects": "1.15.6",
    "node-forge": "1.3.1",
+    "pdf-fontkit": "1.8.9",
    "pdf-lib": "1.17.1"
  },
  "devDependencies": {
--- a/test-ts/package.json
+++ b/test-ts/package.json
@ -11,7 +11,7 @@
    "test": "node test/index.js ${pfxpwd}"
  },
  "dependencies": {
-    "zgapdfsigner": "^2.7.0"
+    "zgapdfsigner": "^2.7.1"
  },
  "devDependencies": {
    "@types/node-forge": "^1.3.11",
--- a/test-ts/src/index.ts
+++ b/test-ts/src/index.ts
@ -9,7 +9,7 @@ async function sign_protect(pdfPath: string, pfxPath: string, ps: string, perm:
  let pfx: Buffer = m_fs.readFileSync(pfxPath);
  let img: Buffer | undefined = undefined;
  let imgType: string = "";
-  let font: Buffer | undefined = undefined;
+  let font: Buffer | Zga.PDFLib.StandardFonts | undefined = undefined;

  if (perm == 1) {
    console.log("\nTest signing pdf with full protection. (permission 1 and password encryption)");
@ -22,8 +22,12 @@ async function sign_protect(pdfPath: string, pfxPath: string, ps: string, perm:
    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,
@ -38,7 +42,7 @@ async function sign_protect(pdfPath: string, pfxPath: string, ps: string, perm:
  if (img || txt) {
    sopt.drawinf = {
      area: {
-        x: 25, // left
+        x: perm ? 25 : 200, // left
        y: 50, // top
        w: txt ? undefined : 60,
        h: txt ? undefined : 100,
@ -108,7 +112,7 @@ async function main1(angle: number): Promise<void> {
  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 = m_path.join(__dirname, workpath + "_test.ttf");
+  let fontPath: string = angle ? Zga.PDFLib.StandardFonts.TimesRomanBold : m_path.join(__dirname, workpath + "_test.ttf");

  if (process.argv.length > 3) {
    pfxPath = process.argv[2];
@ -123,8 +127,9 @@ async function main1(angle: number): Promise<void> {
  }

  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", fontPath);
-    pdfPath = await sign_protect(pdfPath, pfxPath, ps, 2, undefined, "ありがとうご\r\n\nThis is an another test of text!\n", fontPath);
+    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);
--- a/test.html
+++ b/test.html
@ -5,7 +5,8 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title> Test for ZgaPdfSigner </title>
 <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-lib/fontkit/dist/fontkit.umd.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">
@ -89,7 +90,7 @@ async function testMe(){
 		if(img || txt){
 			sopt.drawinf = {
 				area: {
-					x: 25, // left
+					x: parseInt(document.getElementById("drawx").value), // left
 					y: 150, // top
 					w: txt ? undefined : 60,
 					h: txt ? undefined : 100,
@ -102,6 +103,7 @@ async function testMe(){
 				textInfo: txt ? {
 					text: txt,
 					fontData: font,
+					subset: true,
 					color: "f00",
 					size: 16,
 					align: 2,
@ -207,6 +209,7 @@ span.header {
 <label>signature image </label><input type="file" id="img" /><br />
 <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>
--- a/test4node.js
+++ b/test4node.js
@ -30,7 +30,7 @@ async function sign_protect(pdfPath, pfxPath, ps, perm, imgPath, txt, fontPath){
 	var img = null;
 	/** @type {string} */
 	var imgType = "";
-	/** @type {Buffer} */
+	/** @type {Buffer|string} */
 	var font = null;

 	if(perm == 1){
@ -44,8 +44,12 @@ async function sign_protect(pdfPath, pfxPath, ps, perm, imgPath, txt, fontPath){
 		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,
@ -61,7 +65,7 @@ async function sign_protect(pdfPath, pfxPath, ps, perm, imgPath, txt, fontPath){
 	if(img || txt){
 		sopt.drawinf = {
 			area: {
-				x: 25, // left
+				x: perm ? 25 : 200, // left
 				y: 50, // top
 				w: txt ? undefined : 60,
 				h: txt ? undefined : 100,
@ -152,6 +156,7 @@ async function main1(angle){
 	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];
@ -166,8 +171,14 @@ async function main1(angle){
 	}

 	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", fontPath);
-		pdfPath = await sign_protect(pdfPath, pfxPath, ps, 2, undefined, "ありがとうご\r\n\nThis is an another test of text!\n", fontPath);
+		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);
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