Encrypt a JWE with a Symmetric Wrapping Key

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.SetWrappingKey, which sets the symmetric key-wrapping key for a recipient. The key bytes are supplied in a named encoding such as hex or base64.

Dim success As Long
success = 0

Dim jwe As New ChilkatJwe

'  Protected header: AES key-wrap with AES-256-GCM content encryption.
Dim header As New ChilkatJsonObject
success = header.UpdateString("alg","A256KW")
success = header.UpdateString("enc","A256GCM")
success = jwe.SetProtectedHeader(header)
If (success = 0) Then
    Debug.Print jwe.LastErrorText
    Exit Sub
End If

'  Set the symmetric key-wrapping key for recipient 0.  The key bytes are provided in the named
'  encoding (here base64).  In production, obtain the key from a secure source rather than hard-coding
'  it.
Dim base64Key As String
base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jwe.SetWrappingKey(0,base64Key,"base64")
If (success = 0) Then
    Debug.Print jwe.LastErrorText
    Exit Sub
End If

Dim jweCompact As String
jweCompact = jwe.Encrypt("This is the secret content.","utf-8")
If (jwe.LastMethodSuccess = 0) Then
    Debug.Print jwe.LastErrorText
    Exit Sub
End If

Debug.Print jweCompact