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Diffstat (limited to 'docs/hazmat/primitives/asymmetric/dsa.rst')
| -rw-r--r-- | docs/hazmat/primitives/asymmetric/dsa.rst | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/docs/hazmat/primitives/asymmetric/dsa.rst b/docs/hazmat/primitives/asymmetric/dsa.rst index 2819bbdb..03e476b6 100644 --- a/docs/hazmat/primitives/asymmetric/dsa.rst +++ b/docs/hazmat/primitives/asymmetric/dsa.rst @@ -118,6 +118,55 @@ DSA ``subgroup_order``, ``generator``, or ``y`` do not match the bounds specified in `FIPS 186-4`_. + .. method:: verifier(signature, algorithm, backend) + + .. versionadded:: 0.4 + + Verify data was signed by the private key associated with this public + key. + + .. code-block:: pycon + + >>> from cryptography.hazmat.backends import default_backend + >>> from cryptography.hazmat.primitives import hashes + >>> from cryptography.hazmat.primitives.asymmetric import dsa + >>> parameters = dsa.DSAParameters.generate( + ... key_size=1024, + ... backend=default_backend() + ... ) + >>> private_key = dsa.DSAPrivateKey.generate( + ... parameters=parameters, + ... backend=default_backend() + ... ) + >>> signer = private_key.signer( + ... hashes.SHA256(), + ... default_backend() + ... ) + >>> data = b"this is some data I'd like to sign" + >>> signer.update(data) + >>> signature = signer.finalize() + >>> public_key = private_key.public_key() + >>> verifier = public_key.verifier( + ... signature, + ... hashes.SHA256(), + ... default_backend() + ... ) + >>> verifier.update(data) + >>> verifier.verify() + + :param bytes signature: The signature to verify. DER encoded as + specified in :rfc:`6979`. + + :param algorithm: An instance of a + :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm` + provider. + + :param backend: A + :class:`~cryptography.hazmat.backends.interfaces.DSABackend` + provider. + + :returns: + :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricVerificationContext` .. _`DSA`: https://en.wikipedia.org/wiki/Digital_Signature_Algorithm .. _`public-key`: https://en.wikipedia.org/wiki/Public-key_cryptography |