Chilkat2-Python

Set the Optional JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetUnprotectedHeader, which sets the optional unprotected header for a signature.

Background. Unlike the protected header, the unprotected header is not covered by the signature. It is carried in the JSON serialization forms of a JWS, so producing a JWS with an unprotected header yields a JSON serialization rather than compact form.

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import sys
import chilkat2

success = False

jws = chilkat2.Jws()

# Protected header specifying HMAC-SHA256.
header = chilkat2.JsonObject()
header.UpdateString("alg","HS256")
success = jws.SetProtectedHeader(0,header)
if (success == False):
    print(jws.LastErrorText)
    sys.exit()

# Set the optional unprotected header for signature 0.  Unlike the protected header, it is not
# covered by the signature.  It is carried in the JSON serialization forms of a JWS.
unprotected = chilkat2.JsonObject()
unprotected.UpdateString("kid","signer-key-1")
success = jws.SetUnprotectedHeader(0,unprotected)
if (success == False):
    print(jws.LastErrorText)
    sys.exit()

bIncludeBom = False
success = jws.SetPayload("This is the content to sign.","utf-8",bIncludeBom)
if (success == False):
    print(jws.LastErrorText)
    sys.exit()

base64Key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU="
success = jws.SetMacKey(0,base64Key,"base64")
if (success == False):
    print(jws.LastErrorText)
    sys.exit()

# Because an unprotected header is present, the JWS is produced in a JSON serialization form.
jwsJson = jws.CreateJws()
if (jws.LastMethodSuccess == False):
    print(jws.LastErrorText)
    sys.exit()

print(jwsJson)