public static string RemoveKeyType(string keyString)
{
if (String.IsNullOrEmpty(keyString))
{
return(keyString);
}
if (keyString.StartsWith(KeySchemeTable.GetKeySchemeValue(KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi)) ||
keyString.StartsWith(KeySchemeTable.GetKeySchemeValue(KeySchemeTable.KeyScheme.DoubleLengthKeyVariant)) ||
keyString.StartsWith(KeySchemeTable.GetKeySchemeValue(KeySchemeTable.KeyScheme.SingleDESKey)) ||
keyString.StartsWith(KeySchemeTable.GetKeySchemeValue(KeySchemeTable.KeyScheme.TripleLengthKeyAnsi)) ||
keyString.StartsWith(KeySchemeTable.GetKeySchemeValue(KeySchemeTable.KeyScheme.TripleLengthKeyVariant)))
{
return(keyString.Substring(1));
}
else
{
return(keyString);
}
}
public static string EncryptUnderZMK(string clearZMK, string clearData, KeySchemeTable.KeyScheme ZMK_KeyScheme, string AtallaVariant)
{
string result = "";
clearZMK = Utility.TransformUsingAtallaVariant(clearZMK, AtallaVariant);
switch (ZMK_KeyScheme)
{
case KeySchemeTable.KeyScheme.SingleDESKey:
case KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.TripleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.Unspecified:
result = TripleDES.TripleDESEncrypt(new HexKey(clearZMK), clearData);
break;
case KeySchemeTable.KeyScheme.DoubleLengthKeyVariant:
case KeySchemeTable.KeyScheme.TripleLengthKeyVariant:
result = TripleDES.TripleDESEncryptVariant(new HexKey(clearZMK), clearData);
break;
default:
break;
}
switch (ZMK_KeyScheme)
{
case KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.DoubleLengthKeyVariant:
case KeySchemeTable.KeyScheme.TripleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.TripleLengthKeyVariant:
result = KeySchemeTable.GetKeySchemeValue(ZMK_KeyScheme) + result;
break;
default:
break;
}
return(result);
}
public static string DecryptUnderLMK(string encryptedKey, KeySchemeTable.KeyScheme Target_KeyScheme, LMKPairs.LMKPair LMKKeyPair, string variantNumber)
{
string result = "";
switch (Target_KeyScheme)
{
case KeySchemeTable.KeyScheme.SingleDESKey:
case KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.TripleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.Unspecified:
result = TripleDES.TripleDESDecrypt(new HexKey(Cryptography.LMK.LMKStorage.LMKVariant(LMKKeyPair, Convert.ToInt32(variantNumber))), encryptedKey);
break;
case KeySchemeTable.KeyScheme.DoubleLengthKeyVariant:
case KeySchemeTable.KeyScheme.TripleLengthKeyVariant:
result = TripleDES.TripleDESDecryptVariant(new HexKey(Cryptography.LMK.LMKStorage.LMKVariant(LMKKeyPair, Convert.ToInt32(variantNumber))), encryptedKey);
break;
default:
break;
}
switch (Target_KeyScheme)
{
case KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.DoubleLengthKeyVariant:
case KeySchemeTable.KeyScheme.TripleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.TripleLengthKeyVariant:
result = KeySchemeTable.GetKeySchemeValue(Target_KeyScheme) + result;
break;
default:
break;
}
return(result);
}
public static string EncryptUnderLMK(string clearKey, KeySchemeTable.KeyScheme Target_KeyScheme, LMKPairs.LMKPair LMKKeyPair, string variantNumber)
{
string result = "";
switch (Target_KeyScheme)
{
case KeySchemeTable.KeyScheme.SingleDESKey:
case KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.TripleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.Unspecified:
result = TripleDES.TripleDESEncrypt(new HexKey(Cryptography.LMK.LMKStorage.LMKVariant(LMKKeyPair, Convert.ToInt32(variantNumber))), clearKey);
break;
case KeySchemeTable.KeyScheme.DoubleLengthKeyVariant:
case KeySchemeTable.KeyScheme.TripleLengthKeyVariant:
result = TripleDES.TripleDESEncryptVariant(new HexKey(Cryptography.LMK.LMKStorage.LMKVariant(LMKKeyPair, Convert.ToInt32(variantNumber))), clearKey);
break;
default:
//throw new InvalidOperationException("Invalid key scheme [" + Target_KeyScheme.ToString() + "]");
break;
}
switch (Target_KeyScheme)
{
case KeySchemeTable.KeyScheme.DoubleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.DoubleLengthKeyVariant:
case KeySchemeTable.KeyScheme.TripleLengthKeyAnsi:
case KeySchemeTable.KeyScheme.TripleLengthKeyVariant:
result = KeySchemeTable.GetKeySchemeValue(Target_KeyScheme) + result;
break;
default:
break;
}
return(result);
}
