Encrypt Binary Content to a JWE

See more JSON Web Encryption (JWE) Examples

Demonstrates Jwe.EncryptBd, which encrypts binary content held in a BinData and writes the resulting JWE into a StringBuilder.

Dim success As Long
success = 0

Dim jwe As New ChilkatJwe

'  Set the JWE protected header, specifying the key-management algorithm (alg) and the content-
'  encryption algorithm (enc).
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

'  The 256-bit key-wrapping key (base64) for recipient index 0.  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

'  Encrypt binary content held in a BinData, writing the resulting JWE into a StringBuilder.
Dim bdContent As New ChilkatBinData
success = bdContent.AppendString("Binary content to encrypt.","utf-8")

Dim sbJwe As New ChilkatStringBuilder
success = jwe.EncryptBd(bdContent,sbJwe)
If (success = 0) Then
    Debug.Print jwe.LastErrorText
    Exit Sub
End If

Debug.Print sbJwe.GetAsString()