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zgapdfsigner
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Improved to reuse the font if it is already embedded in the PDF.

main 2.7.1
zboris12 2024-08-18 21:32:27 +09:00
parent 1f92ca61d7
commit 4def4068f7
11 changed files with 303 additions and 37 deletions
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7
README.md
View File

@ -51,9 +51,10 @@ 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/pako@1.0.11/dist/pako_inflate.min.js" type="text/javascript"></script>
```
### [Google Apps Script](https://developers.google.com/apps-script)
@ -68,8 +69,10 @@ function setTimeout(func, sleep){
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.
// It is necessary for drawing text for signature.
eval(UrlFetchApp.fetch("https://unpkg.com/@pdf-lib/fontkit/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

63
closure/pdflib-ext.js
View File

@ -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

6
lib/zgaindex.js
View File

@ -8,11 +8,11 @@ function genZga(){
const z = {};
/**
* @param {string} msg
* @param {...string} msg
*/
z.log = function(msg){
z.log = function(...msg){
if(z.debug){
console.log(msg);
console.log(...msg);
}
};

7
lib/zganode.d.ts vendored
View File

@ -37,7 +37,7 @@ export type SignAreaInfo = {
};
export type SignTextInfo = {
text: string,
fontData?: Array<number> | Uint8Array | ArrayBuffer | string;
fontData?: Array<number> | Uint8Array | ArrayBuffer | PDFLib.StandardFonts;
color?: string;
opacity?: number;
blendMode?: string;
@ -109,3 +109,8 @@ 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): Promise<PDFLib.PDFFont>;
}

1
lib/zganode.js
View File

@ -7,6 +7,7 @@ const z = require("./zgaindex.js");
z.forge = require("node-forge");
z.PDFLib = require("pdf-lib");
z.fontkit = require("@pdf-lib/fontkit");
z.pako = require("pako");
/**
* @param {string} url
* @param {UrlFetchParams} params

210
lib/zgapdfsigner.js
View File

@ -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;
@ -341,21 +346,8 @@ 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);
}
/** @type {forge_cert} */
@ -1839,6 +1831,186 @@ 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);
}
/** @type {PDFLib.CustomFontEmbedder} */
var emdr = await PDFLib.CustomFontEmbedder.for(fontkit, fdat);
fonts.push({
font: PDFLib.PDFFont.of(poe[0], pdfdoc, emdr),
data: fdat,
});
}
}
}
}
}
}
return new z.PdfFonts(pdfdoc, fonts);
}
/**
* @public
* @param {Array<number>|Uint8Array|ArrayBuffer|string|undefined} fontData
* @return {Promise<PDFLib.PDFFont>}
*/
async getEmbeddedFont(fontData){
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);
}
}
/**
* @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
* @return {Promise<PDFLib.PDFFont>}
*/
async getCustomFont(fontData){
/** @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);
}
/**
* @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 +2020,14 @@ z.SignatureCreator = class{
* }}
*/
var SplitLongWordResult;
/**
* @typedef
* {{
* font: PDFLib.PDFFont,
* data: (Uint8Array|undefined),
* }}
*/
var FontInfo;
}

2
package.json
View File

@ -1,6 +1,6 @@
{
"name": "zgapdfsigner",
"version": "2.7.0",
"version": "2.7.1",
"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",

2
test-ts/package.json
View File

@ -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",

17
test-ts/src/index.ts
View File

@ -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)");
@ -22,7 +22,11 @@ async function sign_protect(pdfPath: string, pfxPath: string, ps: string, perm:
imgType = m_path.extname(imgPath).slice(1);
}
if (fontPath) {
font = m_fs.readFileSync(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,
@ -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);

4
test.html
View File

@ -6,6 +6,7 @@
<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/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,
@ -207,6 +208,7 @@ 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>

21
test4node.js
View File

@ -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){
@ -44,7 +44,11 @@ async function sign_protect(pdfPath, pfxPath, ps, perm, imgPath, txt, fontPath){
imgType = m_path.extname(imgPath).slice(1);
}
if(fontPath){
font = m_fs.readFileSync(fontPath);
if(Zga.PDFLib.isStandardFont(fontPath)){
font = fontPath;
}else{
font = m_fs.readFileSync(fontPath);
}
}
/** @type {SignOption} */
var sopt = {
@ -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);