Load and Validate a JWS from a String

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJws, which loads a JWS from its compact serialization string. The example then supplies the MAC key and validates the signature.

llSuccess = .F.

loJws = createobject("CkJws")

//  Load the JWS compact serialization.
lcJwsCompact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>"
llSuccess = loJws.LoadJws(lcJwsCompact)
if (llSuccess = .F.) then
    ? loJws.LastErrorText
    release loJws
    return
endif

//  Provide the HMAC key for signer 0, then validate the signature.  Validate returns 1 when the
//  signature is cryptographically valid, 0 when it is not, or a negative value on error.
lcBase64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
llSuccess = loJws.SetMacKey(0,lcBase64Key,"base64")
if (llSuccess = .F.) then
    ? loJws.LastErrorText
    release loJws
    return
endif

v = loJws.Validate(0)
if (v < 0) then
    ? loJws.LastErrorText
    release loJws
    return
endif

if (v <> 1) then
    ? "The signature is not valid."
    release loJws
    return
endif

? "The signature is valid."


release loJws