// HACK: should not create a form in a process object void ProvidePassword(PdfPasswordProviderArgs args) { using (PasswordForm form = new PasswordForm(this.path)) { switch (form.ShowDialog()) { case DialogResult.OK: args.Password = form.Password; break; case DialogResult.Cancel: args.Abort = true; break; } } }
/// <summary> /// Opens an existing PDF document. /// </summary> public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider) { PdfDocument document = null; try { Lexer lexer = new Lexer(stream); document = new PdfDocument(lexer); document.state |= DocumentState.Imported; document.openMode = openmode; document.fileSize = stream.Length; // Get file version byte[] header = new byte[1024]; stream.Position = 0; stream.Read(header, 0, 1024); document.version = GetPdfFileVersion(header); if (document.version == 0) throw new InvalidOperationException(PSSR.InvalidPdf); // Read all trailers document.irefTable.IsUnderConstruction = true; Parser parser = new Parser(document); document.trailer = parser.ReadTrailer(); document.irefTable.IsUnderConstruction = false; // Is document encrypted? PdfReference xrefEncrypt = document.trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference; if (xrefEncrypt != null) { //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false); PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false); encrypt.Reference = xrefEncrypt; xrefEncrypt.Value = encrypt; PdfStandardSecurityHandler securityHandler = document.SecurityHandler; TryAgain: PasswordValidity validity = securityHandler.ValidatePassword(password); if (validity == PasswordValidity.Invalid) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) return null; password = args.Password; goto TryAgain; } else { if (password == null) throw new PdfReaderException(PSSR.PasswordRequired); else throw new PdfReaderException(PSSR.InvalidPassword); } } else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) return null; password = args.Password; goto TryAgain; } else throw new PdfReaderException(PSSR.OwnerPasswordRequired); } } else { if (password != null) { // Password specified but document is not encrypted. // ignore } } PdfReference[] irefs = document.irefTable.AllReferences; int count = irefs.Length; // Read all indirect objects for (int idx = 0; idx < count; idx++) { PdfReference iref = irefs[idx]; if (iref.Value == null) { try { Debug.Assert(document.irefTable.Contains(iref.ObjectID)); PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false); Debug.Assert(pdfObject.Reference == iref); pdfObject.Reference = iref; Debug.Assert(pdfObject.Reference.Value != null, "something got wrong"); } catch (Exception ex) { Debug.WriteLine(ex.Message); } } else { Debug.Assert(document.irefTable.Contains(iref.ObjectID)); iref.GetType(); } // Set maximum object number document.irefTable.maxObjectNumber = Math.Max(document.irefTable.maxObjectNumber, iref.ObjectNumber); } // Encrypt all objects if (xrefEncrypt != null) { document.SecurityHandler.EncryptDocument(); } // Fix references of trailer values and then objects and irefs are consistent. document.trailer.Finish(); #if DEBUG_ // Some tests... PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer); reachables.GetType(); reachables = document.xrefTable.AllXRefs; document.xrefTable.CheckConsistence(); #endif if (openmode == PdfDocumentOpenMode.Modify) { // Create new or change existing document IDs if (document.Internals.SecondDocumentID == "") document.trailer.CreateNewDocumentIDs(); else { byte[] agTemp = Guid.NewGuid().ToByteArray(); document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length); } // Change modification date document.Info.ModificationDate = DateTime.Now; // Remove all unreachable objects int removed = document.irefTable.Compact(); if (removed != 0) Debug.WriteLine("Number of deleted unreachable objects: " + removed); // Force flattening of page tree PdfPages pages = document.Pages; //bool b = document.irefTable.Contains(new PdfObjectID(1108)); //b.GetType(); document.irefTable.CheckConsistence(); document.irefTable.Renumber(); document.irefTable.CheckConsistence(); } } finally { //if (filestream != null) // filestream.Close(); } return document; }
/// <summary> /// Opens an existing PDF document asynchronously. /// </summary> public static async Task <PdfDocument> OpenAsync( Stream stream, string password = null, PdfDocumentOpenMode openmode = PdfDocumentOpenMode.Modify, PdfPasswordProvider passwordProvider = null) { PdfDocument document; #if !DEBUG try #endif { Lexer lexer = new Lexer(stream); document = new PdfDocument(lexer); document._state |= DocumentState.Imported; document._openMode = openmode; document._fileSize = stream.Length; // Get file version. byte[] header = new byte[1024]; stream.Position = 0; stream.Read(header, 0, 1024); document._version = GetPdfFileVersion(header); if (document._version == 0) { throw new InvalidOperationException(PSSR.InvalidPdf); } document._irefTable.IsUnderConstruction = true; Parser parser = new Parser(document); // Read all trailers or cross-reference streams, but no objects. document._trailer = await parser.ReadTrailerAsync(); if (document._trailer == null) { ParserDiagnostics.ThrowParserException("Invalid PDF file: no trailer found."); // TODO L10N using PSSR. } Debug.Assert(document._irefTable.IsUnderConstruction); document._irefTable.IsUnderConstruction = false; // Is document encrypted? PdfReference xrefEncrypt = document._trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference; if (xrefEncrypt != null) { PdfObject encrypt = await parser.ReadObjectAsync(null, xrefEncrypt.ObjectID, false, false); encrypt.Reference = xrefEncrypt; xrefEncrypt.Value = encrypt; PdfStandardSecurityHandler securityHandler = document.SecurityHandler; TryAgain: PasswordValidity validity = securityHandler.ValidatePassword(password); if (validity == PasswordValidity.Invalid) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) { return(null); } password = args.Password; goto TryAgain; } else { if (password == null) { throw new PdfReaderException(PSSR.PasswordRequired); } else { throw new PdfReaderException(PSSR.InvalidPassword); } } } else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) { return(null); } password = args.Password; goto TryAgain; } else { throw new PdfReaderException(PSSR.OwnerPasswordRequired); } } } else { if (password != null) { // Password specified but document is not encrypted. // ignore } } PdfReference[] irefs2 = document._irefTable.AllReferences; int count2 = irefs2.Length; // 3rd: Create iRefs for all compressed objects. Dictionary <int, object> objectStreams = new Dictionary <int, object>(); for (int idx = 0; idx < count2; idx++) { PdfReference iref = irefs2[idx]; if (iref.Value is PdfCrossReferenceStream xrefStream) { for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++) { PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2]; // Is type xref to compressed object? if (item.Type == 2) { //PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3); //document._irefTable.Add(irefNew); int objectNumber = (int)item.Field2; if (!objectStreams.ContainsKey(objectNumber)) { objectStreams.Add(objectNumber, null); PdfObjectID objectID = new PdfObjectID((int)item.Field2); parser.ReadIRefsFromCompressedObject(objectID); } } } } } // 4th: Read compressed objects. for (int idx = 0; idx < count2; idx++) { PdfReference iref = irefs2[idx]; if (iref.Value is PdfCrossReferenceStream xrefStream) { for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++) { PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2]; // Is type xref to compressed object? if (item.Type == 2) { PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3); Debug.Assert(document._irefTable.Contains(iref.ObjectID)); //document._irefTable.Add(irefNew); } } } } PdfReference[] irefs = document._irefTable.AllReferences; int count = irefs.Length; // Read all indirect objects. for (int idx = 0; idx < count; idx++) { PdfReference iref = irefs[idx]; if (iref.Value == null) { #if DEBUG_ if (iref.ObjectNumber == 1074) { iref.GetType(); } #endif try { Debug.Assert(document._irefTable.Contains(iref.ObjectID)); PdfObject pdfObject = await parser.ReadObjectAsync(null, iref.ObjectID, false, false); Debug.Assert(pdfObject.Reference == iref); pdfObject.Reference = iref; Debug.Assert(pdfObject.Reference.Value != null, "Something went wrong."); } catch (Exception ex) { Debug.WriteLine(ex.Message); // 4STLA rethrow exception to notify caller. throw; } } else { Debug.Assert(document._irefTable.Contains(iref.ObjectID)); //iref.GetType(); } // Set maximum object number. document._irefTable._maxObjectNumber = Math.Max(document._irefTable._maxObjectNumber, iref.ObjectNumber); } // Decrypt all objects. if (xrefEncrypt != null) { document.SecurityHandler.DecryptDocument(); } // Fix references of trailer values and then objects and irefs are consistent. document._trailer.Finish(); #if DEBUG_ // Some tests... PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer); reachables.GetType(); reachables = document.xrefTable.AllXRefs; document.xrefTable.CheckConsistence(); #endif if (openmode == PdfDocumentOpenMode.Modify) { // Create new or change existing document IDs. if (document.Internals.SecondDocumentID == "") { document._trailer.CreateNewDocumentIDs(); } else { byte[] agTemp = Guid.NewGuid().ToByteArray(); document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length); } // Change modification date document.Info.ModificationDate = DateTime.Now; // Remove all unreachable objects int removed = document._irefTable.Compact(); if (removed != 0) { Debug.WriteLine("Number of deleted unreachable objects: " + removed); } // Force flattening of page tree PdfPages pages = document.Pages; Debug.Assert(pages != null); //bool b = document.irefTable.Contains(new PdfObjectID(1108)); //b.GetType(); document._irefTable.CheckConsistence(); document._irefTable.Renumber(); document._irefTable.CheckConsistence(); } } #if !DEBUG catch (Exception ex) { Debug.WriteLine(ex.Message); throw; } #endif return(document); }
/// <summary> /// The 'get the password' call back function. /// </summary> static void PasswordProvider(PdfPasswordProviderArgs args) { // Show a dialog here in a real application args.Password = "******"; }
public void PasswordProvider (PdfPasswordProviderArgs args) { // This method is called from some random thread, but we need // to do the dialog on the GUI thread; use the reset_event // to block this thread until the user is done with the dialog. ThreadAssist.BlockingProxyToMain (delegate { Log.Debug ("Password requested to open document"); var dialog = new Hyena.Widgets.HigMessageDialog ( Window, DialogFlags.Modal, MessageType.Question, ButtonsType.None, Catalog.GetString ("Document is Encrypted"), Catalog.GetString ("Enter the document's password to open it:") ); dialog.Image = Gtk.IconTheme.Default.LoadIcon ("dialog-password", 48, 0); var password_entry = new Entry () { Visibility = false }; password_entry.Show (); dialog.LabelVBox.PackStart (password_entry, false, false, 12); dialog.AddButton (Stock.Cancel, ResponseType.Cancel, false); dialog.AddButton (Stock.Ok, ResponseType.Ok, true); var response = (ResponseType)dialog.Run (); string password = password_entry.Text; dialog.Destroy (); if (response == ResponseType.Ok) { args.Password = Document.Password = password; } else { Log.Information ("Password dialog cancelled"); args.Abort = true; } }); }
/// <summary> /// Opens an existing PDF document. /// </summary> public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider) { PdfDocument document = null; try { Lexer lexer = new Lexer(stream); document = new PdfDocument(lexer); document.state |= DocumentState.Imported; document.openMode = openmode; document.fileSize = stream.Length; // Get file version byte[] header = new byte[1024]; stream.Position = 0; stream.Read(header, 0, 1024); document.version = GetPdfFileVersion(header); if (document.version == 0) { throw new InvalidOperationException(PSSR.InvalidPdf); } // Read all trailers document.irefTable.IsUnderConstruction = true; Parser parser = new Parser(document); document.trailer = parser.ReadTrailer(); document.irefTable.IsUnderConstruction = false; // Is document encrypted? PdfReference xrefEncrypt = document.trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference; if (xrefEncrypt != null) { //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false); PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false); encrypt.Reference = xrefEncrypt; xrefEncrypt.Value = encrypt; PdfStandardSecurityHandler securityHandler = document.SecurityHandler; TryAgain: PasswordValidity validity = securityHandler.ValidatePassword(password); if (validity == PasswordValidity.Invalid) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) { return(null); } password = args.Password; goto TryAgain; } else { if (password == null) { throw new PdfReaderException(PSSR.PasswordRequired); } else { throw new PdfReaderException(PSSR.InvalidPassword); } } } else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) { return(null); } password = args.Password; goto TryAgain; } else { throw new PdfReaderException(PSSR.OwnerPasswordRequired); } } } else { if (password != null) { // Password specified but document is not encrypted. // ignore } } PdfReference[] irefs = document.irefTable.AllReferences; int count = irefs.Length; // Read all indirect objects for (int idx = 0; idx < count; idx++) { PdfReference iref = irefs[idx]; if (iref.Value == null) { try { Debug.Assert(document.irefTable.Contains(iref.ObjectID)); PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false); Debug.Assert(pdfObject.Reference == iref); pdfObject.Reference = iref; Debug.Assert(pdfObject.Reference.Value != null, "something got wrong"); } catch (Exception ex) { Debug.WriteLine(ex.Message); } } else { Debug.Assert(document.irefTable.Contains(iref.ObjectID)); iref.GetType(); } // Set maximum object number document.irefTable.maxObjectNumber = Math.Max(document.irefTable.maxObjectNumber, iref.ObjectNumber); } // Encrypt all objects if (xrefEncrypt != null) { document.SecurityHandler.EncryptDocument(); } // Fix references of trailer values and then objects and irefs are consistent. document.trailer.Finish(); #if DEBUG_ // Some tests... PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer); reachables.GetType(); reachables = document.xrefTable.AllXRefs; document.xrefTable.CheckConsistence(); #endif if (openmode == PdfDocumentOpenMode.Modify) { // Create new or change existing document IDs if (document.Internals.SecondDocumentID == "") { document.trailer.CreateNewDocumentIDs(); } else { byte[] agTemp = Guid.NewGuid().ToByteArray(); document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length); } // Change modification date document.Info.ModificationDate = DateTime.Now; // Remove all unreachable objects int removed = document.irefTable.Compact(); if (removed != 0) { Debug.WriteLine("Number of deleted unreachable objects: " + removed.ToString()); } // Force flattening of page tree PdfPages pages = document.Pages; //bool b = document.irefTable.Contains(new PdfObjectID(1108)); //b.GetType(); document.irefTable.CheckConsistence(); document.irefTable.Renumber(); document.irefTable.CheckConsistence(); } } finally { //if (filestream != null) // filestream.Close(); } return(document); }
/// <summary> /// Opens an existing PDF document. /// </summary> public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider) { PdfDocument document; try { Lexer lexer = new Lexer(stream); document = new PdfDocument(lexer); document._state |= DocumentState.Imported; document._openMode = openmode; document._fileSize = stream.Length; // Get file version. byte[] header = new byte[1024]; stream.Position = 0; stream.Read(header, 0, 1024); document._version = GetPdfFileVersion(header); if (document._version == 0) throw new InvalidOperationException(PSSR.InvalidPdf); document._irefTable.IsUnderConstruction = true; Parser parser = new Parser(document); // Read all trailers or cross-reference streams, but no objects. document._trailer = parser.ReadTrailer(); Debug.Assert(document._irefTable.IsUnderConstruction); document._irefTable.IsUnderConstruction = false; // Is document encrypted? PdfReference xrefEncrypt = document._trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference; if (xrefEncrypt != null) { //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false); PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false, false); encrypt.Reference = xrefEncrypt; xrefEncrypt.Value = encrypt; PdfStandardSecurityHandler securityHandler = document.SecurityHandler; TryAgain: PasswordValidity validity = securityHandler.ValidatePassword(password); if (validity == PasswordValidity.Invalid) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) return null; password = args.Password; goto TryAgain; } else { if (password == null) throw new PdfReaderException(PSSR.PasswordRequired); else throw new PdfReaderException(PSSR.InvalidPassword); } } else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify) { if (passwordProvider != null) { PdfPasswordProviderArgs args = new PdfPasswordProviderArgs(); passwordProvider(args); if (args.Abort) return null; password = args.Password; goto TryAgain; } else throw new PdfReaderException(PSSR.OwnerPasswordRequired); } } else { if (password != null) { // Password specified but document is not encrypted. // ignore } } PdfReference[] irefs2 = document._irefTable.AllReferences; int count2 = irefs2.Length; // 3rd: Create iRefs for all compressed objects. Dictionary<int, object> objectStreams = new Dictionary<int, object>(); for (int idx = 0; idx < count2; idx++) { PdfReference iref = irefs2[idx]; PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream; if (xrefStream != null) { for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++) { PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2]; // Is type xref to compressed object? if (item.Type == 2) { //PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3); //document._irefTable.Add(irefNew); int objectNumber = (int)item.Field2; if (!objectStreams.ContainsKey(objectNumber)) { objectStreams.Add(objectNumber, null); PdfObjectID objectID = new PdfObjectID((int)item.Field2); parser.ReadIRefsFromCompressedObject(objectID); } } } } } // 4th: Read compressed objects. for (int idx = 0; idx < count2; idx++) { PdfReference iref = irefs2[idx]; PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream; if (xrefStream != null) { for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++) { PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2]; // Is type xref to compressed object? if (item.Type == 2) { PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3); Debug.Assert(document._irefTable.Contains(iref.ObjectID)); //document._irefTable.Add(irefNew); } } } } PdfReference[] irefs = document._irefTable.AllReferences; int count = irefs.Length; // Read all indirect objects. for (int idx = 0; idx < count; idx++) { PdfReference iref = irefs[idx]; if (iref.Value == null) { #if DEBUG_ if (iref.ObjectNumber == 1074) iref.GetType(); #endif try { Debug.Assert(document._irefTable.Contains(iref.ObjectID)); PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false, false); Debug.Assert(pdfObject.Reference == iref); pdfObject.Reference = iref; Debug.Assert(pdfObject.Reference.Value != null, "Something went wrong."); } catch (Exception ex) { Debug.WriteLine(ex.Message); // 4STLA rethrow exception to notify caller. throw; } } else { Debug.Assert(document._irefTable.Contains(iref.ObjectID)); //iref.GetType(); } // Set maximum object number. document._irefTable._maxObjectNumber = Math.Max(document._irefTable._maxObjectNumber, iref.ObjectNumber); } // Encrypt all objects. if (xrefEncrypt != null) { document.SecurityHandler.EncryptDocument(); } // Fix references of trailer values and then objects and irefs are consistent. document._trailer.Finish(); #if DEBUG_ // Some tests... PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer); reachables.GetType(); reachables = document.xrefTable.AllXRefs; document.xrefTable.CheckConsistence(); #endif if (openmode == PdfDocumentOpenMode.Modify) { // Create new or change existing document IDs. if (document.Internals.SecondDocumentID == "") document._trailer.CreateNewDocumentIDs(); else { byte[] agTemp = Guid.NewGuid().ToByteArray(); document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length); } // Change modification date document.Info.ModificationDate = DateTime.Now; // Remove all unreachable objects int removed = document._irefTable.Compact(); if (removed != 0) Debug.WriteLine("Number of deleted unreachable objects: " + removed); // Force flattening of page tree PdfPages pages = document.Pages; Debug.Assert(pages != null); //bool b = document.irefTable.Contains(new PdfObjectID(1108)); //b.GetType(); document._irefTable.CheckConsistence(); document._irefTable.Renumber(); document._irefTable.CheckConsistence(); } } catch (Exception ex) { Debug.WriteLine(ex.Message); throw; } return document; }