2-Key Triple DES

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

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// Needs #include <CkCrypt2.h>

    CkString strOut;

    CkCrypt2 crypt;

    bool success;
    success = crypt.UnlockComponent("Anything for 30-day trial.");
    if (success != true) {
        strOut.append("Crypt component unlock failed\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Specify 3DES for the encryption algorithm:
    crypt.put_CryptAlgorithm("3des");

    crypt.put_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.put_KeyLength(128);

    //  Pad with zeros
    crypt.put_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.put_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.put_HashAlgorithm("md5");
    const char * keyHex;
    keyHex = crypt.hashStringENC("secretPassword");

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

    //  Encrypt
    const char * encStr;
    encStr = crypt.encryptStringENC("The quick brown fox jumped over the lazy dog");
    strOut.append(encStr);
    strOut.append("\r\n");

    //  Now decrypt:
    const char * decStr;
    decStr = crypt.decryptStringENC(encStr);
    strOut.append(decStr);
    strOut.append("\r\n");

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());