public static string DecryptString(Crypt2 crypt, string text, int srno)
{
var s = CryptoManager.FactoryMethod(srno) as ICryptography;
s.Configure(crypt);
return(crypt.DecryptStringENC(text));
}
public static string GenerateMac()
{
Crypt2 crypt = new Crypt2();
bool success = crypt.UnlockComponent("Anything for 30-day trial");
if (success != true)
{
Console.WriteLine(crypt.LastErrorText);
return("");
}
// Specify 3DES for the encryption algorithm:
crypt.CryptAlgorithm = "3des";
// CipherMode may be "ecb" or "cbc"
crypt.CipherMode = "cbc";
// KeyLength must be 192. 3DES is technically 168-bits;
// the most-significant bit of each key byte is a parity bit,
// so we must indicate a KeyLength of 192, which includes
// the parity bits.
crypt.KeyLength = 192;
// The padding scheme determines the contents of the bytes
// that are added to pad the result to a multiple of the
// encryption algorithm's block size. 3DES has a block
// size of 8 bytes, so encrypted output is always
// a multiple of 8.
crypt.PaddingScheme = 0;
// EncodingMode specifies the encoding of the output for
// encryption, and the input for decryption.
// It may be "hex", "url", "base64", or "quoted-printable".
crypt.EncodingMode = "hex";
// An initialization vector is required if using CBC or CFB modes.
// ECB mode does not use an IV.
// The length of the IV is equal to the algorithm's block size.
// It is NOT equal to the length of the key.
string ivHex = "0001020304050607";
crypt.SetEncodedIV(ivHex, "hex");
// The secret key must equal the size of the key. For
// 3DES, the key must be 24 bytes (i.e. 192-bits).
string keyHex = "000102030405060708090A0B0C0D0E0F0001020304050607";
crypt.SetEncodedKey(keyHex, "hex");
// Encrypt a string...
// The input string is 44 ANSI characters (i.e. 44 bytes), so
// the output should be 48 bytes (a multiple of 8).
// Because the output is a hex string, it should
// be 96 characters long (2 chars per byte).
string encStr = crypt.EncryptStringENC("The quick brown fox jumps over the lazy dog.");
Console.WriteLine(encStr);
// Now decrypt:
string decStr = crypt.DecryptStringENC(encStr);
Console.WriteLine(decStr);
return(decStr);
}
public string Decrypt(string value)
{
return(crypt.DecryptStringENC(value));
}
