(Swift 2) RSA Sign utf-8 Byte Representation of String

Demontstrates how to sign the utf-8 byte representation of a string.

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.

    // Load an RSA private key for signing.
    let privKey = CkoPrivateKey()
    var success: Bool = privKey.LoadEncryptedPemFile("qa_data/pem/rsa_passwd.pem", password: "passwd")
    if success != true {
        print("\(privKey.LastErrorText)")
        return
    }

    let rsa = CkoRsa()
    rsa.ImportPrivateKeyObj(privKey)

    var originalData: String? = "This is the string to be hashed an RSA signed."

    // Indicate that we want the utf-8 byte representation of the string to be signed
    rsa.Charset = "utf-8"

    // We want the RSA signature in base64 format
    rsa.EncodingMode = "base64"

    var sigBase64: String? = rsa.SignStringENC(originalData, hashAlg: "sha256")
    print("\(sigBase64!)")

}