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(Swift 3/4) 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!!)")

}

 

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