Swift Requires Chilkat v11.0.0+

RSA Signature SHA256withRSA, iso-8859-1, base64

See more RSA Examples

RSA sign the iso-8859-1 byte representation of a string with SHA256withRSA, and return the signature in the base64 encoding. 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.

    //  This example will duplicate the following Java code:
    //  
    //  Signature sign = Signature.getInstance("SHA256withRSA");
    //  sign.initSign(privateKey);
    //  sign.update(original.getBytes(Charset.forName("ISO-8859-1")));
    //  
    //  ...
    //  byte[] resultado = sign.sign();
    //  sello = encodeByteArrayToBase64(resultado);
    //  

    //  Load an RSA private key for signing.
    //  You can load any format file.  This example loads a .pem, but you can provide path to any type of file holding a private key.
    let privKey = CkoPrivateKey()!
    success = privKey.loadAnyFormatFile(path: "qa_data/pem/rsa_passwd.pem", password: "passwd")
    if success == false {
        print("\(privKey.lastErrorText!)")
        return
    }

    let rsa = CkoRsa()!
    rsa.usePrivateKey(privKey: privKey)

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

    //  Indicate that we want the iso-8859-1 byte representation of the string to be signed
    rsa.charset = "iso-8859-1"

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

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

}