Swift Requires Chilkat v11.0.0+

RSA Sign with PKCS8 Encrypted Key

See more RSA Examples

Demonstrates how to load a private key from an encrypted PKCS8 file and create an RSA digital signature. Swift

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(path: "privateKey.key", password: "myPassword")

    let rsa = CkoRsa()!

    //  Import the private key into the RSA object:
    success = rsa.usePrivateKey(privKey: 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(str: strData, hashAlg: "sha-1")

    print("\(hexSig!)")

}