(Swift 3,4,5...) Demonstrates the MacString Method

Demonstrates the MacString method to do HMAC-SHA256, HMAC-SHA1, and HMAC-MD5.

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

func chilkatTest() {
    // This example assumes Chilkat Crypt2 to have been previously unlocked.
    // See Unlock Crypt2 for sample code.

    // Demonstrates how to reproduce the following results found at
    // https://en.wikipedia.org/wiki/Hash-based_message_authentication_code

    // HMAC_SHA256("key", "The quick brown fox jumps over the lazy dog") = 0xf7bc83f430538424b13298e6aa6fb143ef4d59a14946175997479dbc2d1a3cd8
    // HMAC_MD5("key", "The quick brown fox jumps over the lazy dog")    = 0x80070713463e7749b90c2dc24911e275
    // HMAC_SHA1("key", "The quick brown fox jumps over the lazy dog")   = 0xde7c9b85b8b78aa6bc8a7a36f70a90701c9db4d9

    let crypt = CkoCrypt2()!

    crypt.macAlgorithm = "hmac"
    crypt.encodingMode = "hex"
    crypt.setMacKeyString("key")
    var sData: String? = "The quick brown fox jumps over the lazy dog"

    let binData = CkoBinData()!
    var macBytes: NSData

    crypt.hashAlgorithm = "SHA-256"
    macBytes = crypt.macString(sData)
    binData.clear()
    binData.appendBinary(macBytes)
    print("HMAC_SHA256: \(binData.getEncoded("hex")!)")

    crypt.hashAlgorithm = "MD5"
    macBytes = crypt.macString(sData)
    binData.clear()
    binData.appendBinary(macBytes)
    print("HMAC_MD5: \(binData.getEncoded("hex")!)")

    crypt.hashAlgorithm = "SHA-1"
    macBytes = crypt.macString(sData)
    binData.clear()
    binData.appendBinary(macBytes)
    print("HMAC_SHA1: \(binData.getEncoded("hex")!)")

    // The output is the same (ignore case)
    // HMAC_SHA256: F7BC83F430538424B13298E6AA6FB143EF4D59A14946175997479DBC2D1A3CD8
    // HMAC_MD5: 80070713463E7749B90C2DC24911E275
    // HMAC_SHA1: DE7C9B85B8B78AA6BC8A7A36F70A90701C9DB4D9

}