(Go) Add S/MIME Signature using PFX

Add a digital signature to a MIME message using the certificate + private key from a PFX file.

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

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

    mime := chilkat.NewMime()

    // Load a PFX file into a certificate object.
    cert := chilkat.NewCert()
    pfxFilepath := "pfxFiles/something.pfx"
    pfxPassword := "secret"
    success := cert.LoadPfxFile(pfxFilepath,pfxPassword)
    if success == false {
        fmt.Println(cert.LastErrorText())
        mime.DisposeMime()
        cert.DisposeCert()
        return
    }

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

    mime.SetCharset("utf-8")
    mime.SetEncoding("quoted-printable")

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

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

    fmt.Println("success!")

    mime.DisposeMime()
    cert.DisposeCert()