Validate a JWS Signature

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.Validate, which validates exactly one signature, identified by a zero-based index, using the key configured at that same index.

    success := false

    jws := chilkat.NewJws()

    //  Load the JWS compact serialization.
    jwsCompact := "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>"
    success = jws.LoadJws(jwsCompact)
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        return
    }

    //  Provide the key for signature 0 (here an HMAC key).
    base64Key := "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
    success = jws.SetMacKey(0,base64Key,"base64")
    if success == false {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        return
    }

    //  Validate the signature identified by the zero-based index, using the key configured at that index.
    //  Validate returns 1 when the signature or MAC is cryptographically valid, 0 when it is not, or a
    //  negative value on error.
    v := jws.Validate(0)
    if v < 0 {
        fmt.Println(jws.LastErrorText())
        jws.DisposeJws()
        return
    }

    if v != 1 {
        fmt.Println("The signature is not valid.")
        jws.DisposeJws()
        return
    }

    fmt.Println("The signature is valid.")

    jws.DisposeJws()