C#

2-Key Triple DES (112 bits)

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Demonstrates 2-Key Triple DES encryption (112-bit 3DES encryption). C#

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

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

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

crypt.CipherMode = "ecb";

// For 2-Key Triple-DES, use a key length of 128
// (Given that each byte's msb is a parity bit, the strength is really 112 bits).
crypt.KeyLength = 128;

// Pad with zeros
crypt.PaddingScheme = 3;

// 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";

// Let's create a secret key by using the MD5 hash of a password.
// The Digest-MD5 algorithm produces a 16-byte hash (i.e. 128 bits)
crypt.HashAlgorithm = "md5";
string keyHex = crypt.HashStringENC("secretPassword");

// Set the encryption key:
crypt.SetEncodedKey(keyHex,"hex");

// Encrypt
string encStr = crypt.EncryptStringENC("The quick brown fox jumped over the lazy dog");
Debug.WriteLine(encStr);

// Now decrypt:
string decStr = crypt.DecryptStringENC(encStr);
Debug.WriteLine(decStr);