Swift

Hash Binary Data (SHA256 and other hash algorithms)

Demonstrates how to hash binary bytes using SHA256, SHA384, SHA512, MD2, MD5, HAVAL, RIPEMD, etc. Swift

func chilkatTest() {
    var success: Bool = false

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

    // Let's load a binary file to get the bytes..
    let jpgData = CkoBinData()!
    success = jpgData.loadFile(path: "qa_data/jpg/starfish.jpg")
    if success != true {
        print("Failed to load file.")
        return
    }

    var jpgBytes: NSData
    jpgBytes = jpgData.getBinary()

    let crypt = CkoCrypt2()!

    // Choose the hash algorithm.
    // Can be  "sha1", "sha256", "sha384", "sha512", "md2", "md5", "haval", "ripemd128", "ripemd160","ripemd256", or "ripemd320".
    crypt.hashAlgorithm = "sha256"

    var hashBytes: NSData
    hashBytes = crypt.hashBytes(bData: jpgBytes)

    // Let's examine the hash as a hex string.
    let sb = CkoStringBuilder()!
    sb.appendEncoded(binaryData: hashBytes, encoding: "hex")
    print("SHA256 hash = \(sb.getAsString()!)")

    // We could alternatively hash the bytes and receive the hex result directly:
    crypt.encodingMode = "hex"
    var hashHexStr: String? = crypt.hashBytesENC(bData: jpgBytes)
    print("SHA256 hash = \(hashHexStr!)")

}