(Swift 2) 2-Key Triple DES (112 bits)

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

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

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

    let crypt = CkoCrypt2()

    // 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"
    var keyHex: String? = crypt.HashStringENC("secretPassword")

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

    // Encrypt
    var encStr: String? = crypt.EncryptStringENC("The quick brown fox jumped over the lazy dog")
    print("\(encStr!)")

    // Now decrypt:
    var decStr: String? = crypt.DecryptStringENC(encStr)
    print("\(decStr!)")

}