diff options
Diffstat (limited to 'cryptography/hazmat/primitives/hmac.py')
| -rw-r--r-- | cryptography/hazmat/primitives/hmac.py | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/cryptography/hazmat/primitives/hmac.py b/cryptography/hazmat/primitives/hmac.py index 618bccc5..76d658aa 100644 --- a/cryptography/hazmat/primitives/hmac.py +++ b/cryptography/hazmat/primitives/hmac.py @@ -16,8 +16,8 @@ from __future__ import absolute_import, division, print_function import six from cryptography import utils -from cryptography.exceptions import AlreadyFinalized -from cryptography.hazmat.primitives import interfaces +from cryptography.exceptions import AlreadyFinalized, InvalidSignature +from cryptography.hazmat.primitives import constant_time, interfaces @utils.register_interface(interfaces.HashContext) @@ -57,3 +57,10 @@ class HMAC(object): digest = self._ctx.finalize() self._ctx = None return digest + + def verify(self, signature): + if isinstance(signature, six.text_type): + raise TypeError("Unicode-objects must be encoded before verifying") + digest = self.finalize() + if not constant_time.bytes_eq(digest, signature): + raise InvalidSignature("Signature did not match digest.") |