Added trust_chain as allowed JWS header argument.

Author: rohe

src/cryptojwt/jws/jws.py

@@ -118,8 +118,9 @@ def sign_compact(self, keys=None, protected=None, **kwargs):
 
         key, xargs, _alg = self.alg_keys(keys, "sig", protected)
 
-        if "typ" in self:
-            xargs["typ"] = self["typ"]
+        for param in ['typ', "trust_chain"]:
+            if param in self:
+                xargs[param] = self[param]
 
         _headers.update(xargs)
         jwt = JWSig(**_headers)

src/cryptojwt/jwx.py

@@ -4,15 +4,14 @@
 import warnings
 
 import requests
-
 from cryptojwt.jwk import JWK
 from cryptojwt.key_bundle import KeyBundle
 
 from .exception import HeaderError
 from .jwe import DEPRECATED
 from .jwk.jwk import key_from_jwk_dict
-from .jwk.rsa import RSAKey
 from .jwk.rsa import import_rsa_key
+from .jwk.rsa import RSAKey
 from .jwk.x509 import load_x509_cert
 from .utils import as_bytes
 from .utils import as_unicode
@@ -50,7 +49,7 @@ class JWx:
     :return: A class instance
     """
 
-    args = ["alg", "jku", "jwk", "x5u", "x5t", "x5c", "kid", "typ", "cty", "crit"]
+    args = ["alg", "jku", "jwk", "x5u", "x5t", "x5c", "kid", "typ", "cty", "crit", "trust_chain"]
 
     def __init__(self, msg=None, with_digest=False, httpc=None, **kwargs):
         self.msg = msg