Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

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.

import sys
import chilkat2

success = False

jws = chilkat2.Jws()

# Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
header = chilkat2.JsonObject()
header.UpdateString("alg","RS256")
success = jws.SetProtectedHeader(0,header)
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()

# 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 the signer's private key and set it for signature 0.
privKey = chilkat2.PrivateKey()
success = privKey.LoadPemFile("qa_data/signer_privkey.pem")
if (success == False):
    print(privKey.LastErrorText)
    sys.exit()

success = jws.SetPrivateKey(0,privKey)
if (success == False):
    print(jws.LastErrorText)
    sys.exit()

jwsCompact = jws.CreateJws()
if (jws.LastMethodSuccess == False):
    print(jws.LastErrorText)
    sys.exit()

print(jwsCompact)