(Go) AddDetachedSignaturePk

Demonstrates how to add a detached signature using a certifcate and it's corresponding private key. The easiest way of doing it is when both the certificate and private key are contained together within a PFX (.pfx or .p12) file. This example demonstrates how to use the certificate and its corresponding private key when they are stored in separate files -- a .cer for the certificate, and a .pem for the private key.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    mime := chilkat.NewMime()

    // Load the certificate from a .cer file.
    cert := chilkat.NewCert()
    success := cert.LoadFromFile("aaworkarea/myCert.cer")
    if success == false {
        fmt.Println(cert.LastErrorText())
        mime.DisposeMime()
        cert.DisposeCert()
        return
    }

    // Load the private key from an encrypted PEM file.
    // (A private key can be loaded from other file formats also..)
    privKey := chilkat.NewPrivateKey()
    success = privKey.LoadEncryptedPemFile("aaworkarea/myPrivateKey.pem","myPassword")
    if success == false {
        fmt.Println(privKey.LastErrorText())
        mime.DisposeMime()
        cert.DisposeCert()
        privKey.DisposePrivateKey()
        return
    }

    success = mime.SetBodyFromPlainText("This is the plain-text MIME body.")

    // Sign the MIME (adds a PKCS7 detached signature)
    success = mime.AddDetachedSignaturePk(cert,privKey)
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        cert.DisposeCert()
        privKey.DisposePrivateKey()
        return
    }

    // Save the S/MIME to a file.
    success = mime.SaveMime("aaworkarea/signedMime.txt")
    if success == false {
        fmt.Println(mime.LastErrorText())
        mime.DisposeMime()
        cert.DisposeCert()
        privKey.DisposePrivateKey()
        return
    }

    fmt.Println("success!")

    mime.DisposeMime()
    cert.DisposeCert()
    privKey.DisposePrivateKey()