(Swift 3,4,5...) Blowfish Encryption to Match PHP's Mcrypt Extension

Demonstrates how to match Blowfish encryption results with PHP's mcrypt extension.

Please refer to this PHP (non-Chilkat) example for PHP Blowfish Encryption. The code here matches the PHP mcrypt results on that web page.

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

    let crypt = CkoCrypt2()!

    // Use "blowfish2" to get proper results:
    crypt.cryptAlgorithm = "blowfish2"

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

    // KeyLength (in bits) may be a number between 32 and 448.
    // 128-bits is usually sufficient.  The KeyLength must be a 
    // multiple of 8.
    crypt.keyLength = 256

    // Pad with NULL bytes (PHP pads with NULL bytes)
    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"

    // The blowfish algorithm uses a 64-bit block size, 
    // therefore the IV must be 8 bytes:
    var ivAscii: String? = "12345678"
    crypt.setEncodedIV(ivAscii, encoding: "ascii")

    // For 256-bit encryption, the key is 32 bytes:
    var keyAscii: String? = "1234567890123456ABCDEFGHIJKLMNOP"
    crypt.setEncodedKey(keyAscii, encoding: "ascii")

    var plainText: String?
    plainText = "The quick brown fox jumped over the lazy dog"

    var cipherText: String? = crypt.encryptStringENC(plainText)
    print("\(cipherText!)")
    // Output should be (case insensitive):
    // 276855ca6c0d60f7d9708210440c1072e05d078e733b34b4198d609dc2fcc2f0c30926cdef3b6d52baf6e345aa03f83e

    // Do 128-bit Blowfish encryption:
    crypt.keyLength = 128
    keyAscii = "1234567890123456"
    crypt.setEncodedKey(keyAscii, encoding: "ascii")

    cipherText = crypt.encryptStringENC(plainText)
    print("\(cipherText!)")
    // Output should be (case insensitive):
    // d2b5abb73208aea3790621d028afcc74d8dd65fb9ea8e666444a72523f5ecca60df79a424e2c714fa6efbafcc40bdca

}