Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

    success := false

    jws := chilkat.NewJws()

    //  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
    header := chilkat.NewJsonObject()
    header.UpdateString("alg","RS256")
    success = jws.SetProtectedHeader(0,header)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        return
    }

    bIncludeBom := false
    success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        return
    }

    //  The file path is relative to the application's current working directory.  An absolute path
    //  may also be used.  Supply the path appropriate to your own environment.
    //  Load the signer's private key and set it for signature 0.
    privKey := chilkat.NewPrivateKey()
    success = privKey.LoadPemFile("qa_data/signer_privkey.pem")
    if success == false {
        fmt.Println(privKey.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        privKey.DisposePrivateKey()
        return
    }

    success = jws.SetPrivateKey(0,privKey)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        privKey.DisposePrivateKey()
        return
    }

    jwsCompact := jws.CreateJws()
    if jws.LastMethodSuccess() == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        header.DisposeJsonObject()
        privKey.DisposePrivateKey()
        return
    }

    fmt.Println(*jwsCompact)

    jws.DisposeJws()
    header.DisposeJsonObject()
    privKey.DisposePrivateKey()