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(); } } } }
private string DecryptAndVerifyData(byte[] bData, string strPassphrase) { // let us see what kind of message this is bool bSymEncrypted = false; bool bAsymEncrypted = false; bool bSigned = false; SharpPrivacyLib.OpenPGP.Messages.Message mContent = null; EncryptedMessage emMessage = new EncryptedMessage(); Packet[] pPackets = Packet.ParsePackets(bData); XmlDocument xmlDoc = new XmlDocument(); XmlElement xmlMessage = xmlDoc.CreateElement("OpenPGPMessage"); try { emMessage.ParseMessage(pPackets); if (emMessage.SymmetricallyEncrypted) { mContent = emMessage.Decrypt(strPassphrase); bSymEncrypted = true; } else { ulong lKeyID = emMessage.GetFittingKeyID(skrKeyRing); mContent = emMessage.Decrypt(skrKeyRing, strPassphrase); bAsymEncrypted = true; } } catch (ArgumentException) { //obviously it wasn't an encrypted message. perhaps the //message has only been signed, but not encrypted! try { SignedMessage smMessage = new SignedMessage(); smMessage.ParseMessage(pPackets); mContent = smMessage; } catch (Exception e) { throw new Exception("Not a valid OpenPGP Message: " + e.Message); } } while ((!(mContent is LiteralMessage)) && (!(mContent is SignedMessage))) { if (mContent is CompressedMessage) { mContent = ((CompressedMessage)mContent).Uncompress(); } else { throw new Exception("Not a valid OpenPGP Message!"); } } LiteralMessage lmContent = new LiteralMessage(); if (mContent is SignedMessage) { bSigned = true; SignedMessage smContent = (SignedMessage)mContent; lmContent = smContent.MessageSigned; xmlMessage.SetAttribute("signaturestatus", smContent.Verify(pkrKeyRing).ToString()); xmlMessage.SetAttribute("signingkey", "0x" + smContent.Signature.KeyID.ToString("x")); xmlMessage.SetAttribute("signingdate", smContent.Signature.TimeCreated.Ticks.ToString()); mContent = lmContent; } xmlMessage.SetAttribute("symmetricallyencrypted", bSymEncrypted.ToString()); xmlMessage.SetAttribute("asymmetricallyencrypted", bAsymEncrypted.ToString()); xmlMessage.SetAttribute("signed", bSigned.ToString()); XmlElement xmlLiteral = xmlDoc.CreateElement("LiteralMessage"); if (mContent is LiteralMessage) { lmContent = (LiteralMessage)mContent; xmlLiteral.SetAttribute("dataformat", lmContent.DataFormat.ToString()); xmlLiteral.SetAttribute("timecreated", lmContent.TimeCreated.Ticks.ToString()); xmlLiteral.SetAttribute("filename", lmContent.Filename); } else { throw new Exception("Error decrypting the message!"); } if (lmContent.DataFormat == DataFormatTypes.Binary) { xmlLiteral.InnerText = Convert.ToBase64String(lmContent.Binary); } else { xmlLiteral.InnerText = lmContent.Text; } xmlMessage.AppendChild(xmlLiteral); return(xmlMessage.OuterXml); }
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(); } } } }