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Diffstat (limited to 'docs/hazmat/primitives/asymmetric/dsa.rst')
| -rw-r--r-- | docs/hazmat/primitives/asymmetric/dsa.rst | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/docs/hazmat/primitives/asymmetric/dsa.rst b/docs/hazmat/primitives/asymmetric/dsa.rst index 03e476b6..98aebb6b 100644 --- a/docs/hazmat/primitives/asymmetric/dsa.rst +++ b/docs/hazmat/primitives/asymmetric/dsa.rst @@ -97,6 +97,49 @@ DSA or if the OpenSSL version is older than 1.0.0 and the key size is larger than 1024 because older OpenSSL versions don't support a key size larger than 1024. + .. method:: signer(algorithm, backend) + + .. versionadded:: 0.4 + + Sign data which can be verified later by others using the 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() + + :param algorithm: An instance of a + :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm` + provider. + + :param backend: A + :class:`~cryptography.hazmat.backends.interfaces.RSABackend` + provider. + + :returns: + :class:`~cryptography.hazmat.primitives.interfaces.AsymmetricSignatureContext` + + :raises cryptography.exceptions.UnsupportedAlgorithm: This is raised if + the provided ``backend`` does not implement + :class:`~cryptography.hazmat.backends.interfaces.DSABackend` + .. class:: DSAPublicKey(modulus, subgroup_order, generator, y) |