(Swift 3,4,5...) Hash Binary Data (SHA256 and other hash algorithms)

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

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 Crypt API to have been previously unlocked.
    // See Unlock Chilkat Crypt for sample code.

    // Let's load a binary file to get the bytes..
    let jpgData = CkoBinData()!
    var success: Bool = jpgData.loadFile("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(jpgBytes)

    // Let's examine the hash as a hex string.
    let sb = CkoStringBuilder()!
    sb.appendEncoded(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(jpgBytes)
    print("SHA256 hash = \(hashHexStr!)")

}