(Swift) RSA Sign with PKCS8 Encrypted Key

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Note: This example requires Chilkat v11.0.0 or greater.

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func chilkatTest() {
    var success: Bool = false

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

    let pkey = CkoPrivateKey()!

    // Load the private key from an RSA PEM file:
    success = pkey.loadPkcs8EncryptedFile("privateKey.key", password: "myPassword")

    let rsa = CkoRsa()!

    // Import the private key into the RSA object:
    success = rsa.use(pkey)
    if success == false {
        print("\(rsa.lastErrorText!)")
        return
    }

    // Return the signature in hex
    rsa.encodingMode = "hex"

    var strData: String? = "This is the string to be signed."

    // Sign the string using the sha-1 hash algorithm.
    // Other valid choices are "md2", "sha256", "sha384", "sha512",  and "md5".
    var hexSig: String? = rsa.signStringENC(strData, hashAlg: "sha-1")

    print("\(hexSig!)")

}