static private GetDefaultKeySize ( |
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oid | ||
return | int |
public static ICipherParameters GenerateCipherParameters( string algorithm, char[] password, bool wrongPkcs12Zero, Asn1Encodable pbeParameters) { string mechanism = (string)algorithms[algorithm.ToUpper(CultureInfo.InvariantCulture)]; byte[] keyBytes = null; byte[] salt = null; int iterationCount = 0; if (IsPkcs12(mechanism)) { Pkcs12PbeParams pbeParams = Pkcs12PbeParams.GetInstance(pbeParameters); salt = pbeParams.GetIV(); iterationCount = pbeParams.Iterations.IntValue; keyBytes = PbeParametersGenerator.Pkcs12PasswordToBytes(password, wrongPkcs12Zero); } else if (IsPkcs5Scheme2(mechanism)) { // See below } else { PbeParameter pbeParams = PbeParameter.GetInstance(pbeParameters); salt = pbeParams.GetSalt(); iterationCount = pbeParams.IterationCount.IntValue; keyBytes = PbeParametersGenerator.Pkcs5PasswordToBytes(password); } ICipherParameters parameters = null; if (IsPkcs5Scheme2(mechanism)) { PbeS2Parameters s2p = PbeS2Parameters.GetInstance(pbeParameters.ToAsn1Object()); AlgorithmIdentifier encScheme = s2p.EncryptionScheme; DerObjectIdentifier encOid = encScheme.ObjectID; Asn1Object encParams = encScheme.Parameters.ToAsn1Object(); // TODO What about s2p.KeyDerivationFunc.ObjectID? Pbkdf2Params pbeParams = Pbkdf2Params.GetInstance(s2p.KeyDerivationFunc.Parameters.ToAsn1Object()); byte[] iv; if (encOid.Equals(PkcsObjectIdentifiers.RC2Cbc)) // PKCS5.B.2.3 { RC2CbcParameter rc2Params = RC2CbcParameter.GetInstance(encParams); iv = rc2Params.GetIV(); } else { iv = Asn1OctetString.GetInstance(encParams).GetOctets(); } salt = pbeParams.GetSalt(); iterationCount = pbeParams.IterationCount.IntValue; keyBytes = PbeParametersGenerator.Pkcs5PasswordToBytes(password); int keyLength = pbeParams.KeyLength != null ? pbeParams.KeyLength.IntValue * 8 : GeneratorUtilities.GetDefaultKeySize(encOid); PbeParametersGenerator gen = MakePbeGenerator( (string)algorithmType[mechanism], null, keyBytes, salt, iterationCount); parameters = gen.GenerateDerivedParameters(encOid.Id, keyLength); if (iv != null) { // FIXME? OpenSSL weirdness with IV of zeros (for ECB keys?) if (Arrays.AreEqual(iv, new byte[iv.Length])) { //Console.Error.Write("***** IV all 0 (length " + iv.Length + ") *****"); } else { parameters = new ParametersWithIV(parameters, iv); } } } else if (mechanism.StartsWith("PBEwithSHA-1")) { PbeParametersGenerator generator = MakePbeGenerator( (string)algorithmType[mechanism], new Sha1Digest(), keyBytes, salt, iterationCount); if (mechanism.Equals("PBEwithSHA-1and128bitRC4")) { parameters = generator.GenerateDerivedParameters("RC4", 128); } else if (mechanism.Equals("PBEwithSHA-1and40bitRC4")) { parameters = generator.GenerateDerivedParameters("RC4", 40); } else if (mechanism.Equals("PBEwithSHA-1and3-keyDESEDE-CBC")) { parameters = generator.GenerateDerivedParameters("DESEDE", 192, 64); } else if (mechanism.Equals("PBEwithSHA-1and2-keyDESEDE-CBC")) { parameters = generator.GenerateDerivedParameters("DESEDE", 128, 64); } else if (mechanism.Equals("PBEwithSHA-1and128bitRC2-CBC")) { parameters = generator.GenerateDerivedParameters("RC2", 128, 64); } else if (mechanism.Equals("PBEwithSHA-1and40bitRC2-CBC")) { parameters = generator.GenerateDerivedParameters("RC2", 40, 64); } else if (mechanism.Equals("PBEwithSHA-1andDES-CBC")) { parameters = generator.GenerateDerivedParameters("DES", 64, 64); } else if (mechanism.Equals("PBEwithSHA-1andRC2-CBC")) { parameters = generator.GenerateDerivedParameters("RC2", 64, 64); } else if (mechanism.Equals("PBEwithSHA-1and128bitAES-CBC-BC")) { parameters = generator.GenerateDerivedParameters("AES", 128, 128); } else if (mechanism.Equals("PBEwithSHA-1and192bitAES-CBC-BC")) { parameters = generator.GenerateDerivedParameters("AES", 192, 128); } else if (mechanism.Equals("PBEwithSHA-1and256bitAES-CBC-BC")) { parameters = generator.GenerateDerivedParameters("AES", 256, 128); } } else if (mechanism.StartsWith("PBEwithSHA-256")) { PbeParametersGenerator generator = MakePbeGenerator( (string)algorithmType[mechanism], new Sha256Digest(), keyBytes, salt, iterationCount); if (mechanism.Equals("PBEwithSHA-256and128bitAES-CBC-BC")) { parameters = generator.GenerateDerivedParameters("AES", 128, 128); } else if (mechanism.Equals("PBEwithSHA-256and192bitAES-CBC-BC")) { parameters = generator.GenerateDerivedParameters("AES", 192, 128); } else if (mechanism.Equals("PBEwithSHA-256and256bitAES-CBC-BC")) { parameters = generator.GenerateDerivedParameters("AES", 256, 128); } } else if (mechanism.StartsWith("PBEwithMD5")) { PbeParametersGenerator generator = MakePbeGenerator( (string)algorithmType[mechanism], new MD5Digest(), keyBytes, salt, iterationCount); if (mechanism.Equals("PBEwithMD5andDES-CBC")) { parameters = generator.GenerateDerivedParameters("DES", 64, 64); } else if (mechanism.Equals("PBEwithMD5andRC2-CBC")) { parameters = generator.GenerateDerivedParameters("RC2", 64, 64); } else if (mechanism.Equals("PBEwithMD5and128bitAES-CBC-OpenSSL")) { parameters = generator.GenerateDerivedParameters("AES", 128, 128); } else if (mechanism.Equals("PBEwithMD5and192bitAES-CBC-OpenSSL")) { parameters = generator.GenerateDerivedParameters("AES", 192, 128); } else if (mechanism.Equals("PBEwithMD5and256bitAES-CBC-OpenSSL")) { parameters = generator.GenerateDerivedParameters("AES", 256, 128); } } else if (mechanism.StartsWith("PBEwithMD2")) { PbeParametersGenerator generator = MakePbeGenerator( (string)algorithmType[mechanism], new MD2Digest(), keyBytes, salt, iterationCount); if (mechanism.Equals("PBEwithMD2andDES-CBC")) { parameters = generator.GenerateDerivedParameters("DES", 64, 64); } else if (mechanism.Equals("PBEwithMD2andRC2-CBC")) { parameters = generator.GenerateDerivedParameters("RC2", 64, 64); } } else if (mechanism.StartsWith("PBEwithHmac")) { string digestName = mechanism.Substring("PBEwithHmac".Length); IDigest digest = DigestUtilities.GetDigest(digestName); PbeParametersGenerator generator = MakePbeGenerator( (string)algorithmType[mechanism], digest, keyBytes, salt, iterationCount); int bitLen = digest.GetDigestSize() * 8; parameters = generator.GenerateDerivedMacParameters(bitLen); } Array.Clear(keyBytes, 0, keyBytes.Length); return(FixDesParity(mechanism, parameters)); }
public static ICipherParameters GenerateCipherParameters(string algorithm, char[] password, bool wrongPkcs12Zero, Asn1Encodable pbeParameters) { string text = (string)algorithms.get_Item((object)Platform.ToUpperInvariant(algorithm)); byte[] array = null; byte[] salt = null; int iterationCount = 0; if (IsPkcs12(text)) { Pkcs12PbeParams instance = Pkcs12PbeParams.GetInstance(pbeParameters); salt = instance.GetIV(); iterationCount = instance.Iterations.IntValue; array = PbeParametersGenerator.Pkcs12PasswordToBytes(password, wrongPkcs12Zero); } else if (!IsPkcs5Scheme2(text)) { PbeParameter instance2 = PbeParameter.GetInstance(pbeParameters); salt = instance2.GetSalt(); iterationCount = instance2.IterationCount.IntValue; array = PbeParametersGenerator.Pkcs5PasswordToBytes(password); } ICipherParameters parameters = null; if (IsPkcs5Scheme2(text)) { PbeS2Parameters instance3 = PbeS2Parameters.GetInstance(pbeParameters.ToAsn1Object()); AlgorithmIdentifier encryptionScheme = instance3.EncryptionScheme; DerObjectIdentifier algorithm2 = encryptionScheme.Algorithm; Asn1Object obj = encryptionScheme.Parameters.ToAsn1Object(); Pbkdf2Params instance4 = Pbkdf2Params.GetInstance(instance3.KeyDerivationFunc.Parameters.ToAsn1Object()); byte[] array2; if (algorithm2.Equals(PkcsObjectIdentifiers.RC2Cbc)) { RC2CbcParameter instance5 = RC2CbcParameter.GetInstance(obj); array2 = instance5.GetIV(); } else { array2 = Asn1OctetString.GetInstance(obj).GetOctets(); } salt = instance4.GetSalt(); iterationCount = instance4.IterationCount.IntValue; array = PbeParametersGenerator.Pkcs5PasswordToBytes(password); int keySize = ((instance4.KeyLength != null) ? (instance4.KeyLength.IntValue * 8) : GeneratorUtilities.GetDefaultKeySize(algorithm2)); PbeParametersGenerator pbeParametersGenerator = MakePbeGenerator((string)algorithmType.get_Item((object)text), null, array, salt, iterationCount); parameters = pbeParametersGenerator.GenerateDerivedParameters(algorithm2.Id, keySize); if (array2 != null && !Arrays.AreEqual(array2, new byte[array2.Length])) { parameters = new ParametersWithIV(parameters, array2); } } else if (Platform.StartsWith(text, "PBEwithSHA-1")) { PbeParametersGenerator pbeParametersGenerator2 = MakePbeGenerator((string)algorithmType.get_Item((object)text), new Sha1Digest(), array, salt, iterationCount); if (text.Equals("PBEwithSHA-1and128bitAES-CBC-BC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("AES", 128, 128); } else if (text.Equals("PBEwithSHA-1and192bitAES-CBC-BC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("AES", 192, 128); } else if (text.Equals("PBEwithSHA-1and256bitAES-CBC-BC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("AES", 256, 128); } else if (text.Equals("PBEwithSHA-1and128bitRC4")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("RC4", 128); } else if (text.Equals("PBEwithSHA-1and40bitRC4")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("RC4", 40); } else if (text.Equals("PBEwithSHA-1and3-keyDESEDE-CBC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("DESEDE", 192, 64); } else if (text.Equals("PBEwithSHA-1and2-keyDESEDE-CBC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("DESEDE", 128, 64); } else if (text.Equals("PBEwithSHA-1and128bitRC2-CBC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("RC2", 128, 64); } else if (text.Equals("PBEwithSHA-1and40bitRC2-CBC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("RC2", 40, 64); } else if (text.Equals("PBEwithSHA-1andDES-CBC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("DES", 64, 64); } else if (text.Equals("PBEwithSHA-1andRC2-CBC")) { parameters = pbeParametersGenerator2.GenerateDerivedParameters("RC2", 64, 64); } } else if (Platform.StartsWith(text, "PBEwithSHA-256")) { PbeParametersGenerator pbeParametersGenerator3 = MakePbeGenerator((string)algorithmType.get_Item((object)text), new Sha256Digest(), array, salt, iterationCount); if (text.Equals("PBEwithSHA-256and128bitAES-CBC-BC")) { parameters = pbeParametersGenerator3.GenerateDerivedParameters("AES", 128, 128); } else if (text.Equals("PBEwithSHA-256and192bitAES-CBC-BC")) { parameters = pbeParametersGenerator3.GenerateDerivedParameters("AES", 192, 128); } else if (text.Equals("PBEwithSHA-256and256bitAES-CBC-BC")) { parameters = pbeParametersGenerator3.GenerateDerivedParameters("AES", 256, 128); } } else if (Platform.StartsWith(text, "PBEwithMD5")) { PbeParametersGenerator pbeParametersGenerator4 = MakePbeGenerator((string)algorithmType.get_Item((object)text), new MD5Digest(), array, salt, iterationCount); if (text.Equals("PBEwithMD5andDES-CBC")) { parameters = pbeParametersGenerator4.GenerateDerivedParameters("DES", 64, 64); } else if (text.Equals("PBEwithMD5andRC2-CBC")) { parameters = pbeParametersGenerator4.GenerateDerivedParameters("RC2", 64, 64); } else if (text.Equals("PBEwithMD5and128bitAES-CBC-OpenSSL")) { parameters = pbeParametersGenerator4.GenerateDerivedParameters("AES", 128, 128); } else if (text.Equals("PBEwithMD5and192bitAES-CBC-OpenSSL")) { parameters = pbeParametersGenerator4.GenerateDerivedParameters("AES", 192, 128); } else if (text.Equals("PBEwithMD5and256bitAES-CBC-OpenSSL")) { parameters = pbeParametersGenerator4.GenerateDerivedParameters("AES", 256, 128); } } else if (Platform.StartsWith(text, "PBEwithMD2")) { PbeParametersGenerator pbeParametersGenerator5 = MakePbeGenerator((string)algorithmType.get_Item((object)text), new MD2Digest(), array, salt, iterationCount); if (text.Equals("PBEwithMD2andDES-CBC")) { parameters = pbeParametersGenerator5.GenerateDerivedParameters("DES", 64, 64); } else if (text.Equals("PBEwithMD2andRC2-CBC")) { parameters = pbeParametersGenerator5.GenerateDerivedParameters("RC2", 64, 64); } } else if (Platform.StartsWith(text, "PBEwithHmac")) { string algorithm3 = text.Substring("PBEwithHmac".get_Length()); IDigest digest = DigestUtilities.GetDigest(algorithm3); PbeParametersGenerator pbeParametersGenerator6 = MakePbeGenerator((string)algorithmType.get_Item((object)text), digest, array, salt, iterationCount); int keySize2 = digest.GetDigestSize() * 8; parameters = pbeParametersGenerator6.GenerateDerivedMacParameters(keySize2); } global::System.Array.Clear((global::System.Array)array, 0, array.Length); return(FixDesParity(text, parameters)); }
internal static int GetDefaultKeySize(DerObjectIdentifier oid) { return(GeneratorUtilities.GetDefaultKeySize(oid.Id)); }