(Go) Create PKCS1 RSA Signature with PEM Private Key

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Demonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.

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

    pkey := chilkat.NewPrivateKey()

    // Load the private key from an RSA PEM file:
    success := pkey.LoadPemFile("pvkey2_rsa.pem")

    var pkeyXml *string = new(string)
    // Get the private key in XML format:
    pkeyXml = pkey.GetXml()

    rsa := chilkat.NewRsa()

    // Import the private key into the RSA object:
    success = rsa.ImportPrivateKey(*pkeyXml)
    if success != true {
        fmt.Println(rsa.LastErrorText())
        pkey.DisposePrivateKey()
        rsa.DisposeRsa()
        return
    }

    // Get the signature as hex.
    rsa.SetEncodingMode("hex")

    strData := "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".
    hexSig := rsa.SignStringENC(strData,"sha-1")

    fmt.Println(*hexSig)

    fmt.Println("Success!")

    pkey.DisposePrivateKey()
    rsa.DisposeRsa()