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.

Dim success As Boolean
success = False

Dim jws As New 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.
Dim sbJws As New Chilkat.StringBuilder
Dim bLoaded As Boolean
bLoaded = sbJws.LoadFile("qa_data/message.jws","utf-8")
If (bLoaded <> True) Then
    System.DebugLog("Failed to load the JWS file.")
    Return
End If

//  Load the JWS from the StringBuilder.
success = jws.LoadJwsSb(sbJws)
If (success = False) Then
    System.DebugLog(jws.LastErrorText)
    Return
End If

Dim base64Key As String
base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jws.SetMacKey(0,base64Key,"base64")
If (success = False) Then
    System.DebugLog(jws.LastErrorText)
    Return
End If

Dim v As Int32
v = jws.Validate(0)
If (v < 0) Then
    System.DebugLog(jws.LastErrorText)
    Return
End If

If (v <> 1) Then
    System.DebugLog("The signature is not valid.")
    Return
End If

System.DebugLog("The signature is valid.")