Load and Validate a JWS from a StringBuilder

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.LoadJwsSb, which loads a JWS from a StringBuilder (here read from a file). The example then supplies the MAC key and validates the signature.

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.

LOCAL lnSuccess
LOCAL loJws
LOCAL loSbJws
LOCAL lnBLoaded
LOCAL lcBase64Key
LOCAL v

lnSuccess = 0

loJws = CreateObject('Chilkat.Jws')

*  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 JWS text from a file into a StringBuilder.
loSbJws = CreateObject('Chilkat.StringBuilder')
lnBLoaded = loSbJws.LoadFile("qa_data/message.jws","utf-8")
IF (lnBLoaded <> 1) THEN
    ? "Failed to load the JWS file."
    RELEASE loJws
    RELEASE loSbJws
    CANCEL
ENDIF

*  Load the JWS from the StringBuilder.
lnSuccess = loJws.LoadJwsSb(loSbJws)
IF (lnSuccess = 0) THEN
    ? loJws.LastErrorText
    RELEASE loJws
    RELEASE loSbJws
    CANCEL
ENDIF

lcBase64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
lnSuccess = loJws.SetMacKey(0,lcBase64Key,"base64")
IF (lnSuccess = 0) THEN
    ? loJws.LastErrorText
    RELEASE loJws
    RELEASE loSbJws
    CANCEL
ENDIF

v = loJws.Validate(0)
IF (v < 0) THEN
    ? loJws.LastErrorText
    RELEASE loJws
    RELEASE loSbJws
    CANCEL
ENDIF

IF (v <> 1) THEN
    ? "The signature is not valid."
    RELEASE loJws
    RELEASE loSbJws
    CANCEL
ENDIF

? "The signature is valid."

RELEASE loJws
RELEASE loSbJws