112-bit 3DES Encryption

Demonstrates how to do 112-bit 3DES encryption.

Download: Chilkat .NET Assemblies

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

bool success;
success = crypt.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show("Crypt component unlock failed");
    return;
}

//  Specify 3DES for the encryption algorithm:
crypt.CryptAlgorithm = "3des";

//  CipherMode may be "ecb" or "cbc"
crypt.CipherMode = "ecb";

//  Set the key length
crypt.KeyLength = 112;

//  Choose a padding scheme...
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;
ivHex = "0001020304050607";
crypt.SetEncodedIV(ivHex,"hex");

//  The secret key must equal the size of the key.
//  Remember, DES (i.e. 3DES) uses a parity bit in the key,
//  so 112-bit 3DES requires 128 bits of key material
//  (i.e. 16 bytes)
string keyHex;
keyHex = "11165395389c904862912aba16d315b8";
crypt.SetEncodedKey(keyHex,"hex");

//  Encrypt a string...
string encStr;
encStr = crypt.EncryptStringENC("999999987");
//  The result should be: 8CDBB138C11EDC3A77F04E488B46385C
MessageBox.Show(encStr);

//  Now decrypt:
string decStr;
decStr = crypt.DecryptStringENC(encStr);
MessageBox.Show(decStr);