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 ChilkatJwe
jwe.Initialize

'  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 ChilkatStringBuilder
sbJwe.Initialize
Dim bLoaded As Boolean = sbJwe.LoadFile("qa_data/message.jwe", "utf-8")
If bLoaded <> True Then
    Log("Failed to load the JWE file.")
    Return
End If

success = jwe.LoadJweSb(sbJwe)
If success = False Then
    Log(jwe.LastErrorText)
    Return
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 Int = jwe.FindRecipient("kid", "recipient-key-1", bCaseSensitive)
If index < 0 Then
    Log("Recipient not found.")
    Return
End If

Log("Found recipient at index " & index)