public string SignText(string strMessage, ulong lSignatureKeyID, string strPassphrase) { SignaturePacket spSign = new SignaturePacket(); strMessage = Radix64.TrimMessage(strMessage); TransportableSecretKey tskKey = skrKeyRing.Find(lSignatureKeyID); SecretKeyPacket skpKey = tskKey.FindKey(AsymActions.Sign); spSign.HashAlgorithm = HashAlgorithms.SHA1; spSign.Format = PacketFormats.New; spSign.KeyID = skpKey.PublicKey.KeyID; spSign.TimeCreated = DateTime.Now; spSign.SignatureAlgorithm = skpKey.PublicKey.Algorithm; spSign.SignatureType = SignatureTypes.TextSignature; spSign.Version = SignaturePacketVersionNumbers.v4; byte[] bMessage = System.Text.Encoding.UTF8.GetBytes(strMessage); spSign.Sign(bMessage, skpKey, strPassphrase); byte[] bSignature = spSign.Generate(); string strSignature = Radix64.Encode(bSignature, true); string strFinal = Armor.WrapCleartextSignature(strMessage, strSignature); return(strFinal); }
public static string ClearTextSign(string strMessage, SecretKeyRing skrKeyRing) { SignaturePacket spSign = new SignaturePacket(); strMessage = Radix64.TrimMessage(strMessage); QueryPassphrase qpPassphrase = new QueryPassphrase(); qpPassphrase.ShowMyDialog(skrKeyRing); string strPassphrase = qpPassphrase.Passphrase; TransportableSecretKey tskKey = qpPassphrase.SelectedKey; SecretKeyPacket skpKey = tskKey.FindKey(AsymActions.Sign); Working wWorking = new Working(); wWorking.Show(); spSign.HashAlgorithm = HashAlgorithms.SHA1; spSign.Format = PacketFormats.New; wWorking.Progress(10); SignatureSubPacket sspCreator = new SignatureSubPacket(); sspCreator.Type = SignatureSubPacketTypes.IssuerKeyID; sspCreator.KeyID = skpKey.PublicKey.KeyID; SignatureSubPacket sspCreationTime = new SignatureSubPacket(); sspCreationTime.Type = SignatureSubPacketTypes.SignatureCreationTime; sspCreationTime.TimeCreated = DateTime.Now; spSign.HashedSubPackets = new SignatureSubPacket[2]; spSign.HashedSubPackets[0] = sspCreator; spSign.HashedSubPackets[1] = sspCreationTime; wWorking.Progress(20); //spSign.KeyID = skpKey.PublicKey.KeyID; //spSign.TimeCreated = DateTime.Now; spSign.SignatureAlgorithm = skpKey.PublicKey.Algorithm; spSign.SignatureType = SignatureTypes.TextSignature; spSign.Version = SignaturePacketVersionNumbers.v4; wWorking.Progress(10); byte[] bMessage = System.Text.Encoding.UTF8.GetBytes(strMessage); spSign.Sign(bMessage, skpKey, strPassphrase); wWorking.Progress(40); byte[] bSignature = spSign.Generate(); string strSignature = Radix64.Encode(bSignature, true); wWorking.Progress(20); string strFinal = Armor.WrapCleartextSignature(strMessage, strSignature); wWorking.Hide(); return(strFinal); }
private static void DecryptAndVerify(SecretKeyRing skrSecretKeyRing, PublicKeyRing pkrPublicKeyRing, byte[] bData) { string strMessage = System.Text.Encoding.UTF8.GetString(bData); ArmorTypes atType = new ArmorTypes(); string strRest = ""; string strRadix64 = Armor.RemoveArmor(strMessage, ref atType, ref strRest); if (strRadix64.Length > 0) { bData = Radix64.Decode(strRadix64); } SharpPrivacy.OpenPGP.Messages.Message mContent = null; if (atType == ArmorTypes.OpenPGPSignature) { string strSignature = ""; string strSignedMessage = Armor.RemoveClearSignatureArmor(strMessage, ref atType, ref strSignature); strSignedMessage = Radix64.DashUnescape(strSignedMessage); strSignedMessage = Radix64.TrimMessage(strSignedMessage); SignedMessage smMessage = new SignedMessage(); Packet[] pPackets = Packet.ParsePackets(strSignature); if (!(pPackets[0] is SignaturePacket)) { MessageBox.Show("Not a valid cleartext signature!"); return; } smMessage.Signature = (SignaturePacket)pPackets[0]; LiteralMessage lmMessage = new LiteralMessage(DataFormatTypes.Text); lmMessage.Text = strSignedMessage; smMessage.MessageSigned = lmMessage; mContent = smMessage; } else { // let us see what kind of message this is EncryptedMessage emMessage = new EncryptedMessage(); try { Packet[] pPackets = Packet.ParsePackets(bData); emMessage.ParseMessage(pPackets); if (emMessage.SymmetricallyEncrypted) { // Query passphrase for symmetrically encrypted message QueryPassphrase qpPassphrase = new QueryPassphrase(); qpPassphrase.ShowMyDialog(); string strPassphrase = qpPassphrase.Passphrase; mContent = emMessage.Decrypt(strPassphrase); } else { ulong lKeyID = emMessage.GetFittingKeyID(skrSecretKeyRing); QueryPassphrase qpPassphrase = new QueryPassphrase(); qpPassphrase.ShowMyDialog(skrSecretKeyRing.Find(lKeyID)); string strPassphrase = qpPassphrase.Passphrase; mContent = emMessage.Decrypt(skrSecretKeyRing, strPassphrase); } while ((!(mContent is LiteralMessage)) && (!(mContent is SignedMessage))) { if (mContent is CompressedMessage) { mContent = ((CompressedMessage)mContent).Uncompress(); } else { MessageBox.Show("This is not a valid OpenPGP message!"); return; } } } catch (Exception ee) { MessageBox.Show("There was an error decrypting your message: " + ee.Message); return; } } LiteralMessage lmContent = new LiteralMessage(); string strDisplay = ""; if (mContent is SignedMessage) { SignedMessage smContent = (SignedMessage)mContent; lmContent = smContent.MessageSigned; strDisplay += "*** OpenPGP Signed Message ***\r\n"; strDisplay += "*** Signature Status: " + smContent.Verify(pkrPublicKeyRing) + " ***\r\n"; strDisplay += "*** Signing Key: " + smContent.Signature.KeyID.ToString("x") + " ***\r\n"; strDisplay += "*** Signing Date: " + smContent.Signature.TimeCreated.ToString() + "***\r\n\r\n"; } else if (mContent is LiteralMessage) { lmContent = (LiteralMessage)mContent; strDisplay += "*** OpenPGP Encrypted Message ***\r\n\r\n"; } else { MessageBox.Show("An error occured: Could not find an encrypted or signed message!", "Error..."); return; } if (lmContent.DataFormat == DataFormatTypes.Text) { strDisplay += lmContent.Text; strDisplay += "\r\n\r\n*** End OpenPGP Message ***\r\n"; PlaintextViewer pvViewer = new PlaintextViewer(); pvViewer.MessageText = strDisplay; pvViewer.Show(); } else { if (MessageBox.Show(strDisplay, "Signature Status...", MessageBoxButtons.OKCancel, MessageBoxIcon.Asterisk, MessageBoxDefaultButton.Button1) == DialogResult.OK) { System.Windows.Forms.SaveFileDialog sfdSave = new SaveFileDialog(); sfdSave.OverwritePrompt = true; sfdSave.Filter = "All Files (*.*)|*.*"; sfdSave.FileName = lmContent.Filename; sfdSave.ShowDialog(); if (sfdSave.FileName.Length > 0) { System.IO.FileStream fsOut = new FileStream(sfdSave.FileName, FileMode.CreateNew); System.IO.BinaryWriter bwOut = new BinaryWriter(fsOut); bwOut.Write(lmContent.Binary); bwOut.Close(); fsOut.Close(); } } } }