Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/tools/commoncryptogenerator/CommonCryptorGenerator.cs

@@ -0,0 +1,104 @@
+//
+// CommonCrypto code generator for symmetric block cipher algorithms
+//
+// Authors:
+//	Sebastien Pouliot  <sebastien@xamarin.com>
+//
+// Copyright 2012 Xamarin Inc.
+//
+
+using System;
+using System.IO;
+
+namespace Xamarin {
+
+	public static class CommonCryptor {
+		
+		static public void Generate (string namespaceName, string typeName, string baseTypeName, string ccAlgorithmName, string feedbackSize = "8", string ctorInitializers = null)
+		{
+			string template = @"// Generated file to bind CommonCrypto cipher algorithms - DO NOT EDIT
+//
+// Authors:
+//	Sebastien Pouliot  <sebastien@xamarin.com>
+//
+// Copyright 2012-2014 Xamarin Inc.
+
+using System;
+using System.Security.Cryptography;
+
+using Mono.Security.Cryptography;
+using Crimson.CommonCrypto;
+
+namespace %NAMESPACE% {
+
+	public sealed partial class %TYPE% : %BASE% {
+		
+		public %TYPE% ()
+		{
+			FeedbackSizeValue = %FEEDBACKSIZE%;
+			%CTOR_INIT%
+		}
+		
+		public override void GenerateIV ()
+		{
+			IVValue = KeyBuilder.IV (BlockSizeValue >> 3);
+		}
+		
+		public override void GenerateKey ()
+		{
+			KeyValue = KeyBuilder.Key (KeySizeValue >> 3);
+		}
+		
+		public override ICryptoTransform CreateDecryptor (byte[] rgbKey, byte[] rgbIV) 
+		{
+			IntPtr decryptor = IntPtr.Zero;
+			switch (Mode) {
+			case CipherMode.CBC:
+				decryptor = Cryptor.Create (CCOperation.Decrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.None, rgbKey, rgbIV);
+				return new FastCryptorTransform (decryptor, this, false, rgbIV);
+			case CipherMode.ECB:
+				decryptor = Cryptor.Create (CCOperation.Decrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.ECBMode, rgbKey, rgbIV);
+				return new FastCryptorTransform (decryptor, this, false, rgbIV);
+			case CipherMode.CFB:
+#if MONOTOUCH || XAMMAC
+				IntPtr encryptor = Cryptor.Create (CCOperation.Encrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.ECBMode, rgbKey, rgbIV);
+				decryptor = Cryptor.Create (CCOperation.Decrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.ECBMode, rgbKey, rgbIV);
+				return new CryptorTransform (decryptor, encryptor, this, false, rgbIV);
+#else
+				throw new CryptographicException (""CFB is not supported by Crimson.CommonCrypto"");
+#endif
+			default:
+				throw new CryptographicException (String.Format (""{0} is not supported by the .NET framework"", Mode));
+			}
+		}
+		
+		public override ICryptoTransform CreateEncryptor (byte[] rgbKey, byte[] rgbIV) 
+		{
+			IntPtr encryptor = IntPtr.Zero;
+			switch (Mode) {
+			case CipherMode.CBC:
+				encryptor = Cryptor.Create (CCOperation.Encrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.None, rgbKey, rgbIV);
+				return new FastCryptorTransform (encryptor, this, true, rgbIV);
+			case CipherMode.ECB:
+				encryptor = Cryptor.Create (CCOperation.Encrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.ECBMode, rgbKey, rgbIV);
+				return new FastCryptorTransform (encryptor, this, true, rgbIV);
+			case CipherMode.CFB:
+#if MONOTOUCH || XAMMAC
+				encryptor = Cryptor.Create (CCOperation.Encrypt, CCAlgorithm.%CCALGORITHM%, CCOptions.ECBMode, rgbKey, rgbIV);
+				return new CryptorTransform (encryptor, IntPtr.Zero, this, true, rgbIV);
+#else
+				throw new CryptographicException (""CFB is not supported by Crimson.CommonCrypto"");
+#endif
+			default:
+				throw new CryptographicException (String.Format (""{0} is not supported by the .NET framework"", Mode));
+			}
+		}
+	}
+}";
+			
+			File.WriteAllText (typeName + ".g.cs", template.Replace ("%NAMESPACE%", namespaceName).
+				Replace ("%TYPE%", typeName).Replace ("%BASE%", baseTypeName).Replace("%FEEDBACKSIZE%", feedbackSize).Replace ("%CTOR_INIT%", ctorInitializers).
+				Replace ("%CCALGORITHM%", ccAlgorithmName.ToString ()));
+		}
+	}
+}