| public static IsPkcs5Scheme2 ( string algorithm ) : bool | ||
| algorithm | string | |
| return | bool | |
public static object CreateEngine(AlgorithmIdentifier algID)
{
string id = algID.ObjectID.Id;
if (PbeUtilities.IsPkcs5Scheme2(id))
{
PbeS2Parameters instance = PbeS2Parameters.GetInstance(algID.Parameters.ToAsn1Object());
AlgorithmIdentifier encryptionScheme = instance.EncryptionScheme;
return(CipherUtilities.GetCipher(encryptionScheme.ObjectID));
}
return(PbeUtilities.CreateEngine(id));
}
public static Asn1Encodable GenerateAlgorithmParameters(string algorithm, byte[] salt, int iterationCount)
{
if (PbeUtilities.IsPkcs12(algorithm))
{
return(new Pkcs12PbeParams(salt, iterationCount));
}
if (PbeUtilities.IsPkcs5Scheme2(algorithm))
{
return(new Pbkdf2Params(salt, iterationCount));
}
return(new PbeParameter(salt, iterationCount));
}
public static ICipherParameters GenerateCipherParameters(string algorithm, char[] password, bool wrongPkcs12Zero, Asn1Encodable pbeParameters)
{
string text = (string)PbeUtilities.algorithms[Platform.ToUpperInvariant(algorithm)];
byte[] array = null;
byte[] salt = null;
int iterationCount = 0;
if (PbeUtilities.IsPkcs12(text))
{
Pkcs12PbeParams instance = Pkcs12PbeParams.GetInstance(pbeParameters);
salt = instance.GetIV();
iterationCount = instance.Iterations.IntValue;
array = PbeParametersGenerator.Pkcs12PasswordToBytes(password, wrongPkcs12Zero);
}
else if (!PbeUtilities.IsPkcs5Scheme2(text))
{
PbeParameter instance2 = PbeParameter.GetInstance(pbeParameters);
salt = instance2.GetSalt();
iterationCount = instance2.IterationCount.IntValue;
array = PbeParametersGenerator.Pkcs5PasswordToBytes(password);
}
ICipherParameters parameters = null;
if (PbeUtilities.IsPkcs5Scheme2(text))
{
PbeS2Parameters instance3 = PbeS2Parameters.GetInstance(pbeParameters.ToAsn1Object());
AlgorithmIdentifier encryptionScheme = instance3.EncryptionScheme;
DerObjectIdentifier objectID = encryptionScheme.ObjectID;
Asn1Object obj = encryptionScheme.Parameters.ToAsn1Object();
Pbkdf2Params instance4 = Pbkdf2Params.GetInstance(instance3.KeyDerivationFunc.Parameters.ToAsn1Object());
byte[] array2;
if (objectID.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(objectID);
PbeParametersGenerator pbeParametersGenerator = PbeUtilities.MakePbeGenerator((string)PbeUtilities.algorithmType[text], null, array, salt, iterationCount);
parameters = pbeParametersGenerator.GenerateDerivedParameters(objectID.Id, keySize);
if (array2 != null && !Arrays.AreEqual(array2, new byte[array2.Length]))
{
parameters = new ParametersWithIV(parameters, array2);
}
}
else if (text.StartsWith("PBEwithSHA-1"))
{
PbeParametersGenerator pbeParametersGenerator2 = PbeUtilities.MakePbeGenerator((string)PbeUtilities.algorithmType[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 (text.StartsWith("PBEwithSHA-256"))
{
PbeParametersGenerator pbeParametersGenerator3 = PbeUtilities.MakePbeGenerator((string)PbeUtilities.algorithmType[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 (text.StartsWith("PBEwithMD5"))
{
PbeParametersGenerator pbeParametersGenerator4 = PbeUtilities.MakePbeGenerator((string)PbeUtilities.algorithmType[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 (text.StartsWith("PBEwithMD2"))
{
PbeParametersGenerator pbeParametersGenerator5 = PbeUtilities.MakePbeGenerator((string)PbeUtilities.algorithmType[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 (text.StartsWith("PBEwithHmac"))
{
string algorithm2 = text.Substring("PBEwithHmac".Length);
IDigest digest = DigestUtilities.GetDigest(algorithm2);
PbeParametersGenerator pbeParametersGenerator6 = PbeUtilities.MakePbeGenerator((string)PbeUtilities.algorithmType[text], digest, array, salt, iterationCount);
int keySize2 = digest.GetDigestSize() * 8;
parameters = pbeParametersGenerator6.GenerateDerivedMacParameters(keySize2);
}
Array.Clear(array, 0, array.Length);
return(PbeUtilities.FixDesParity(text, parameters));
}