Find a JWE Recipient by Header Value

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.FindRecipient, which searches the per-recipient unprotected headers for a member with a given name and string value, and returns the matching recipient index.

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 = False

Dim jwe As New Chilkat.Jwe

'  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 a multi-recipient JWE (JSON serialization) from a file.
Dim sbJwe As New Chilkat.StringBuilder
Dim bLoaded As Boolean = sbJwe.LoadFile("qa_data/message.jwe","utf-8")
If (bLoaded <> True) Then
    Debug.WriteLine("Failed to load the JWE file.")
    Exit Sub
End If

success = jwe.LoadJweSb(sbJwe)
If (success = False) Then
    Debug.WriteLine(jwe.LastErrorText)
    Exit Sub
End If


'  Search the per-recipient unprotected headers for a member named "kid" whose value equals the
'  given string.  Returns the recipient index, or -1 if not found.
Dim bCaseSensitive As Boolean = True
Dim index As Integer = jwe.FindRecipient("kid","recipient-key-1",bCaseSensitive)
If (index < 0) Then
    Debug.WriteLine("Recipient not found.")
    Exit Sub
End If

Debug.WriteLine("Found recipient at index " & index)