Fixes password for range request loading

src/api.js

@@ -17,7 +17,7 @@
 /* globals CanvasGraphics, combineUrl, createScratchCanvas, error, ErrorFont,
            Font, FontLoader, globalScope, info, isArrayBuffer, loadJpegStream,
            MessageHandler, PDFJS, PDFObjects, Promise, StatTimer, warn,
-           WorkerMessageHandler */
+           WorkerMessageHandler, PasswordResponses */
 
  'use strict';
 
@@ -39,9 +39,16 @@
  * to manually serve range requests for data in the PDF. See viewer.js for
  * an example of pdfDataRangeTransport's interface.
  *
+ * @param {function} passwordCallback is optional. It is used to request a
+ * password if wrong or no password was provided. The callback receives two
+ * parameters: function that needs to be called with new password and reason
+ * (see {PasswordResponses}).
+ *
  * @return {Promise} A promise that is resolved with {PDFDocumentProxy} object.
  */
-PDFJS.getDocument = function getDocument(source, pdfDataRangeTransport) {
+PDFJS.getDocument = function getDocument(source,
+                                         pdfDataRangeTransport,
+                                         passwordCallback) {
   var workerInitializedPromise, workerReadyPromise, transport;
 
   if (typeof source === 'string') {
@@ -71,6 +78,7 @@ PDFJS.getDocument = function getDocument(source, pdfDataRangeTransport) {
   transport = new WorkerTransport(workerInitializedPromise,
       workerReadyPromise, pdfDataRangeTransport);
   workerInitializedPromise.then(function transportInitialized() {
+    transport.passwordCallback = passwordCallback;
     transport.fetchDocument(params);
   });
   return workerReadyPromise;
@@ -482,6 +490,8 @@ var WorkerTransport = (function WorkerTransportClosure() {
     this.pagePromises = [];
     this.embeddedFontsUsed = false;
 
+    this.passwordCallback = null;
+
     // If worker support isn't disabled explicit and the browser has worker
     // support, create a new web worker and test if it/the browser fullfills
     // all requirements to run parts of pdf.js in a web worker.
@@ -559,6 +569,10 @@ var WorkerTransport = (function WorkerTransportClosure() {
       function WorkerTransport_setupMessageHandler(messageHandler) {
       this.messageHandler = messageHandler;
 
+      function updatePassword(password) {
+        messageHandler.send('UpdatePassword', password);
+      }
+
       var pdfDataRangeTransport = this.pdfDataRangeTransport;
       if (pdfDataRangeTransport) {
         pdfDataRangeTransport.addRangeListener(function(begin, chunk) {
@@ -588,10 +602,18 @@ var WorkerTransport = (function WorkerTransportClosure() {
       }, this);
 
       messageHandler.on('NeedPassword', function transportPassword(data) {
+        if (this.passwordCallback) {
+          return this.passwordCallback(updatePassword,
+                                       PasswordResponses.NEED_PASSWORD);
+        }
         this.workerReadyPromise.reject(data.exception.message, data.exception);
       }, this);
 
       messageHandler.on('IncorrectPassword', function transportBadPass(data) {
+        if (this.passwordCallback) {
+          return this.passwordCallback(updatePassword,
+                                       PasswordResponses.INCORRECT_PASSWORD);
+        }
         this.workerReadyPromise.reject(data.exception.message, data.exception);
       }, this);
 

src/crypto.js

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 /* globals bytesToString, DecryptStream, error, isInt, isName, Name,
-           PasswordException, stringToBytes */
+           PasswordException, PasswordResponses, stringToBytes */
 
 'use strict';
 
@@ -575,7 +575,8 @@ var CipherTransformFactory = (function CipherTransformFactoryClosure() {
                                        ownerPassword, userPassword, flags,
                                        revision, keyLength, encryptMetadata);
     if (!encryptionKey && !password) {
-      throw new PasswordException('No password given', 'needpassword');
+      throw new PasswordException('No password given',
+                                  PasswordResponses.NEED_PASSWORD);
     } else if (!encryptionKey && password) {
       // Attempting use the password as an owner password
       var decodedPassword = decodeUserPassword(passwordBytes, ownerPassword,
@@ -586,7 +587,8 @@ var CipherTransformFactory = (function CipherTransformFactoryClosure() {
     }
 
     if (!encryptionKey)
-      throw new PasswordException('Incorrect Password', 'incorrectpassword');
+      throw new PasswordException('Incorrect Password',
+                                  PasswordResponses.INCORRECT_PASSWORD);
 
     this.encryptionKey = encryptionKey;
 

src/pdf_manager.js

@@ -56,6 +56,13 @@ var BasePdfManager = (function BasePdfManagerClosure() {
 
     requestLoadedStream: function BasePdfManager_requestLoadedStream() {
       return new NotImplementedException();
+    },
+
+    updatePassword: function BasePdfManager_updatePassword(password) {
+      this.pdfModel.xref.password = this.password = password;
+      if (this.passwordChangedPromise) {
+        this.passwordChangedPromise.resolve();
+      }
     }
   };
 

src/util.js

@@ -139,6 +139,11 @@ function shadow(obj, prop, value) {
   return value;
 }
 
+var PasswordResponses = PDFJS.PasswordResponses = {
+  NEED_PASSWORD: 1,
+  INCORRECT_PASSWORD: 2
+};
+
 var PasswordException = (function PasswordExceptionClosure() {
   function PasswordException(msg, code) {
     this.name = 'PasswordException';

src/worker.js

@@ -18,7 +18,7 @@
            MissingPDFException, PasswordException, PDFDocument, PDFJS, Promise,
            Stream, UnknownErrorException, warn, NetworkManager, LocalPdfManager,
            NetworkPdfManager, XRefParseException, NotImplementedException,
-           isInt */
+           isInt, PasswordResponses */
 
 'use strict';
 
@@ -267,11 +267,11 @@ var WorkerMessageHandler = {
 
       var onFailure = function(e) {
         if (e instanceof PasswordException) {
-          if (e.code === 'needpassword') {
+          if (e.code === PasswordResponses.NEED_PASSWORD) {
             handler.send('NeedPassword', {
               exception: e
             });
-          } else if (e.code === 'incorrectpassword') {
+          } else if (e.code === PasswordResponses.INCORRECT_PASSWORD) {
             handler.send('IncorrectPassword', {
               exception: e
             });
@@ -291,10 +291,17 @@ var WorkerMessageHandler = {
         }
       };
 
-      getPdfManager(data).then(function() {
-        loadDocument(false).then(onSuccess, function(ex) {
+      getPdfManager(data).then(function pdfManagerReady() {
+        loadDocument(false).then(onSuccess, function loadFailure(ex) {
           // Try again with recoveryMode == true
           if (!(ex instanceof XRefParseException)) {
+            if (ex instanceof PasswordException) {
+              // after password exception prepare to receive a new password
+              // to repeat loading
+              pdfManager.passwordChangedPromise = new Promise();
+              pdfManager.passwordChangedPromise.then(pdfManagerReady);
+            }
+
             onFailure(ex);
             return;
           }
@@ -349,6 +356,10 @@ var WorkerMessageHandler = {
       });
     });
 
+    handler.on('UpdatePassword', function wphSetupUpdatePassword(data) {
+      pdfManager.updatePassword(data);
+    });
+
     handler.on('GetAnnotationsRequest', function wphSetupGetAnnotations(data) {
       pdfManager.getPage(data.pageIndex).then(function(page) {
         pdfManager.ensure(page, 'getAnnotationsData', []).then(