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Diffstat (limited to 'docs/hazmat/primitives/asymmetric/padding.rst')
| -rw-r--r-- | docs/hazmat/primitives/asymmetric/padding.rst | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/docs/hazmat/primitives/asymmetric/padding.rst b/docs/hazmat/primitives/asymmetric/padding.rst index 2a5de3c7..89af7eaa 100644 --- a/docs/hazmat/primitives/asymmetric/padding.rst +++ b/docs/hazmat/primitives/asymmetric/padding.rst @@ -10,10 +10,13 @@ Padding correct padding signatures can be forged, messages decrypted, and private keys compromised. -.. class:: PSS(mgf) +.. class:: PSS(mgf, salt_length) .. versionadded:: 0.3 + .. versionchanged:: 0.4 + Added ``salt_length`` parameter. + PSS (Probabilistic Signature Scheme) is a signature scheme defined in :rfc:`3447`. It is more complex than PKCS1 but possesses a `security proof`_. This is the `recommended padding algorithm`_ for RSA signatures. @@ -21,6 +24,14 @@ Padding :param mgf: A mask generation function object. At this time the only supported MGF is :class:`MGF1`. + :param int salt_length: The length of the salt. It is recommended that this + be set to ``PSS.MAX_LENGTH``. + + .. attribute:: MAX_LENGTH + + Pass this attribute to ``salt_length`` to get the maximum salt length + available. + .. class:: PKCS1v15() .. versionadded:: 0.3 @@ -31,10 +42,13 @@ Padding Mask generation functions ~~~~~~~~~~~~~~~~~~~~~~~~~ -.. class:: MGF1(algorithm, salt_length) +.. class:: MGF1(algorithm) .. versionadded:: 0.3 + .. versionchanged:: 0.4 + Deprecated the ``salt_length`` parameter. + MGF1 (Mask Generation Function 1) is used as the mask generation function in :class:`PSS` padding. It takes a hash algorithm and a salt length. @@ -42,14 +56,6 @@ Mask generation functions :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm` provider. - :param int salt_length: The length of the salt. It is recommended that this - be set to ``MGF1.MAX_LENGTH``. - - .. attribute:: MAX_LENGTH - - Pass this attribute to ``salt_length`` to get the maximum salt length - available. - .. _`Padding is critical`: http://rdist.root.org/2009/10/06/why-rsa-encryption-padding-is-critical/ .. _`security proof`: http://eprint.iacr.org/2001/062.pdf |