def test_rsapss_verify_should_return_true_for_test_vector(self):
"""
This test verifies that RSA-PSS verification works with a known good
signature and key.
Reference: https://tools.ietf.org/html/rfc7520#section-4.2
"""
signing_input = ensure_bytes(
'eyJhbGciOiJQUzM4NCIsImtpZCI6ImJpbGJvLmJhZ2dpbnNAaG9iYml0b24uZXhhb'
'XBsZSJ9.SXTigJlzIGEgZGFuZ2Vyb3VzIGJ1c2luZXNzLCBGcm9kbywgZ29pbmcgb'
'3V0IHlvdXIgZG9vci4gWW91IHN0ZXAgb250byB0aGUgcm9hZCwgYW5kIGlmIHlvdS'
'Bkb24ndCBrZWVwIHlvdXIgZmVldCwgdGhlcmXigJlzIG5vIGtub3dpbmcgd2hlcmU'
'geW91IG1pZ2h0IGJlIHN3ZXB0IG9mZiB0by4')
signature = base64url_decode(
ensure_bytes(
'cu22eBqkYDKgIlTpzDXGvaFfz6WGoz7fUDcfT0kkOy42miAh2qyBzk1xEsnk2IpN6'
'-tPid6VrklHkqsGqDqHCdP6O8TTB5dDDItllVo6_1OLPpcbUrhiUSMxbbXUvdvWXz'
'g-UD8biiReQFlfz28zGWVsdiNAUf8ZnyPEgVFn442ZdNqiVJRmBqrYRXe8P_ijQ7p'
'8Vdz0TTrxUeT3lm8d9shnr2lfJT8ImUjvAA2Xez2Mlp8cBE5awDzT0qI0n6uiP1aC'
'N_2_jLAeQTlqRHtfa64QQSUmFAAjVKPbByi7xho0uTOcbH510a6GYmJUAfmWjwZ6o'
'D4ifKo8DYM-X72Eaw'))
algo = RSAPSSAlgorithm(RSAPSSAlgorithm.SHA384)
key = algo.prepare_key(load_rsa_pub_key())
result = algo.verify(signing_input, key, signature)
assert result
def test_rsa_pss_sign_then_verify_should_return_true(self):
algo = RSAPSSAlgorithm(RSAPSSAlgorithm.SHA256)
message = ensure_bytes('Hello World!')
with open(key_path('testkey_rsa'), 'r') as keyfile:
priv_key = algo.prepare_key(keyfile.read())
sig = algo.sign(message, priv_key)
with open(key_path('testkey_rsa.pub'), 'r') as keyfile:
pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(message, pub_key, sig)
assert result
def test_rsa_pss_verify_should_return_false_if_signature_invalid(self):
algo = RSAPSSAlgorithm(RSAPSSAlgorithm.SHA256)
jwt_message = b"Hello World!"
jwt_sig = base64.b64decode(
b"ywKAUGRIDC//6X+tjvZA96yEtMqpOrSppCNfYI7NKyon3P7doud5v65oWNu"
b"vQsz0fzPGfF7mQFGo9Cm9Vn0nljm4G6PtqZRbz5fXNQBH9k10gq34AtM02c"
b"/cveqACQ8gF3zxWh6qr9jVqIpeMEaEBIkvqG954E0HT9s9ybHShgHX9mlWk"
b"186/LopP4xe5c/hxOQjwhv6yDlTiwJFiqjNCvj0GyBKsc4iECLGIIO+4mC4"
b"daOCWqbpZDuLb1imKpmm8Nsm56kAxijMLZnpCcnPgyb7CqG+B93W9GHglA5"
b"drUeR1gRtO7vqbZMsCAQ4bpjXxwbYyjQlEVuMl73UL6sOWg==")
jwt_sig += b"123" # Signature is now invalid
with open(key_path("testkey_rsa.pub")) as keyfile:
jwt_pub_key = algo.prepare_key(keyfile.read())
result = algo.verify(jwt_message, jwt_pub_key, jwt_sig)
assert not result