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
success = 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
bLoaded = sbJwe.LoadFile("qa_data/message.jwe","utf-8")
If (bLoaded <> True) Then
    System.DebugLog("Failed to load the JWE file.")
    Return
End If

success = jwe.LoadJweSb(sbJwe)
If (success = False) Then
    System.DebugLog(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
bCaseSensitive = True
Dim index As Int32
index = jwe.FindRecipient("kid","recipient-key-1",bCaseSensitive)
If (index < 0) Then
    System.DebugLog("Recipient not found.")
    Return
End If

System.DebugLog("Found recipient at index " + Str(index))