Swift

Create PKCS1 RSA Signature with PEM Private Key

See more RSA Examples

Demonstrates how to load a private key from a PEM file and create a PKCS1 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.loadPemFile(path: "pvkey2_rsa.pem")
    if success == false {
        print("\(pkey.lastErrorText!)")
        return
    }

    let rsa = CkoRsa()!

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

    // Get the signature as 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", "md5", "sha256",
    // "sha384", and "sha512".
    var hexSig: String? = rsa.signStringENC(str: strData, hashAlg: "sha-1")

    print("\(hexSig!)")

    print("Success!")

}