Sign a JWS with a Certificate

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetSigningCert, which sets the certificate whose associated private key is used to create a 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 Long
success = 0

Dim jws As New ChilkatJws

'  Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
Dim header As New ChilkatJsonObject
success = header.UpdateString("alg","RS256")
success = jws.SetProtectedHeader(0,header)
If (success = 0) Then
    Debug.Print jws.LastErrorText
    Exit Sub
End If

Dim bIncludeBom As Long
bIncludeBom = 0
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
If (success = 0) Then
    Debug.Print jws.LastErrorText
    Exit Sub
End If

'  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.
'  The PFX password should come from a secure source rather than being hard-coded.
Dim pfxPassword As String
pfxPassword = "myPfxPassword"

'  Load a certificate that has an associated private key, then set it as the signing certificate for
'  signature 0.  The certificate's private key is used to create the signature.
Dim cert As New ChilkatCert
success = cert.LoadPfxFile("qa_data/signer.pfx",pfxPassword)
If (success = 0) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

success = jws.SetSigningCert(0,cert)
If (success = 0) Then
    Debug.Print jws.LastErrorText
    Exit Sub
End If

Dim jwsCompact As String
jwsCompact = jws.CreateJws()
If (jws.LastMethodSuccess = 0) Then
    Debug.Print jws.LastErrorText
    Exit Sub
End If

Debug.Print jwsCompact