Added support to add a document timestamp from a TSA.

README.md

@@ -1,6 +1,6 @@
 # ZgaPdfSigner
 A javascript tool to sign a pdf or set protection of a pdf in web browser.  
-And it also can be used in Google Apps Script.  
+And it also can be used in Google Apps Script and nodejs.  
 
 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.
@@ -11,7 +11,8 @@ And I use this name to hope the merits from this application will be dedicated t
 * Sign a pdf with a visible pkcs#7 signature by drawing an image.
 * Sign a pdf and set DocMDP(document modification detection and prevention).
 * Add a new signature to a pdf if it has been signed already. (An incremental update)
-* Sign a pdf with a timestamp from TSA(Time Stamp Authority). (Only in Google Apps Script)
+* Add a document timestamp from TSA(Time Stamp Authority). (Only in Google Apps Script and nodejs)
+* Sign a pdf with a timestamp from TSA. (Only in Google Apps Script and nodejs)
 * Set password protection to a pdf. Supported algorithms:
   * 40bit RC4 Encryption
   * 128bit RC4 Encryption
@@ -138,8 +139,8 @@ fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.
 
 ## Detail of SignOption
 
-* __p12cert__: Array<number>|Uint8Array|ArrayBuffer|string :point_right: Certificate's data
-* __pwd__: string :point_right: The passphrase of the certificate
+* __p12cert__: Array<number>|Uint8Array|ArrayBuffer|string :point_right: (Optional) Certificate's data. In the case of adding a document timestamp, it must be omitted.
+* __pwd__: string :point_right: (Optional) The passphrase of the certificate. In the case of adding a document timestamp, it must be omitted.
 * __permission__: number :point_right: (Optional) The modification permissions granted for this document.
   This is a setting of DocMDP(document modification detection and prevention). Valid values are:
   * 1: No changes to the document are permitted; any change to the document invalidates the signature.
@@ -148,7 +149,7 @@ fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.
 * __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|string|_TsaServiceInfo_ :point_right: (Optional)
+* __signdate__: Date|string|_TsaServiceInfo_ :point_right: (Optional) In the case of adding a document timestamp, it can't be omitted and can't be a Date.
   * When it is a Date, it means the date and time of signing.
   * When it is a string, it can be an url of TSA or an index of the preset TSAs as below:
     * "1": http://ts.ssl.com
@@ -161,6 +162,7 @@ fld.createFile(Utilities.newBlob(u8arr, "application/pdf").setName("signed_test.
   * When it is a _TsaServiceInfo_, it means a full customized information of a TSA.
     * __url__: string :point_right: The url of TSA
     * __len__: number :point_right: (Optional) The length of signature's placeholder
+    * __headers__: Object<string, *> :point_right: (Optional) The customized headers for sending to tsa server
   * When it is omitted, the system timestamp will be used.
 * __signame__: string :point_right: (Optional) The name of the signature
 * __drawinf__: _SignDrawInfo_ :point_right: (Optional) Visible signature's information

closure/forge-ext.js

@@ -102,6 +102,8 @@ forge.asn1.integerToDer = function(num){};
 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;
@@ -126,7 +128,7 @@ forge.asn1.Class.CONTEXT_SPECIFIC;
  * @param {number} tagClass
  * @param {number} type
  * @param {boolean} constructed
- * @param {Array<string>|string} value
+ * @param {Array<forge.asn1>|forge.asn1|number|string} value
  * @param {Object=} options
  * @return {forge.asn1}
  */

closure/zb-externs.js

@@ -3,6 +3,7 @@
  * {{
  *    url: string,
  *    len: (number|undefined),
+ *    headers: (Object<string, *>|undefined),
  * }}
  */
 var TsaServiceInfo;
@@ -32,15 +33,17 @@ var SignAreaInfo;
  */
 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.
  *
  * @typedef
  * {{
- *    p12cert: (Array<number>|Uint8Array|ArrayBuffer|string),
- *    pwd: string,
+ *    p12cert: (Array<number>|Uint8Array|ArrayBuffer|string|undefined),
+ *    pwd: (string|undefined),
  *    permission: (number|undefined),
  *    reason: (string|undefined),
  *    location: (string|undefined),

test4node.js

@@ -11,13 +11,12 @@ globalThis.forge = require("node-forge");
 require("./zgapdfcryptor.js");
 require("./zgapdfsigner.js");
 
-Zga.UrlFetchApp = {};
 /**
  * @param {string} url
  * @param {UrlFetchParams} params
  * @return {Promise<Uint8Array>}
  */
-Zga.UrlFetchApp.fetch = function(url, params){
+Zga.urlFetch = function(url, params){
 	return new Promise(function(resolve, reject){
 		/** @type {URL} */
 		var opts = m_urlparser.parse(url);
@@ -91,13 +90,17 @@ async function main(){
 	}
 
 	if(!ps){
-		throw new Error("The passphrase is not specified.");
+		// throw new Error("The passphrase is not specified.");
+		pfxPath = "";
 	}
 
 	/** @type {Buffer} */
 	var pdf = m_fs.readFileSync(pdfPath);
 	/** @type {Buffer} */
-	var pfx = m_fs.readFileSync(pfxPath);
+	var pfx = null;
+	if(pfxPath){
+		pfx = m_fs.readFileSync(pfxPath);
+	}
 	/** @type {Buffer} */
 	var img = null;
 	/** @type {string} */
@@ -109,11 +112,11 @@ async function main(){
 
 	/** @type {SignOption} */
 	var sopt = null;
-	if(pfx){
+	if(pdf){
 		sopt = {
 			p12cert: pfx,
 			pwd: ps,
-			permission: 1,
+			permission: pfx ? 1 : 0,
 			signdate: "1",
 			reason: "I have a test reason.",
 			location: "I am on the earth.",