diff options
| author | Determinant <[email protected]> | 2022-11-17 18:08:59 -0800 |
|---|---|---|
| committer | Determinant <[email protected]> | 2022-11-17 18:08:59 -0800 |
| commit | 8154806fe2fccacdc3dafaa68181a07bcf8d6c4c (patch) | |
| tree | f477e6a005599bb88c18db142c267b9297c6060b /frozen_deps/Cryptodome/Hash/KMAC256.py | |
| parent | be4dc086591c9bced04a507d127c83811c5700c4 (diff) | |
v0.1.7
Diffstat (limited to 'frozen_deps/Cryptodome/Hash/KMAC256.py')
| -rw-r--r-- | frozen_deps/Cryptodome/Hash/KMAC256.py | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/frozen_deps/Cryptodome/Hash/KMAC256.py b/frozen_deps/Cryptodome/Hash/KMAC256.py new file mode 100644 index 0000000..82da062 --- /dev/null +++ b/frozen_deps/Cryptodome/Hash/KMAC256.py @@ -0,0 +1,74 @@ +# =================================================================== +# +# Copyright (c) 2021, Legrandin <[email protected]> +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS +# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE +# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, +# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN +# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +# POSSIBILITY OF SUCH DAMAGE. +# =================================================================== + +from Cryptodome.Util.py3compat import is_bytes + +from .KMAC128 import KMAC_Hash +from . import cSHAKE256 + + +def new(**kwargs): + """Create a new KMAC256 object. + + Args: + key (bytes/bytearray/memoryview): + The key to use to compute the MAC. + It must be at least 256 bits long (32 bytes). + data (bytes/bytearray/memoryview): + Optional. The very first chunk of the message to authenticate. + It is equivalent to an early call to :meth:`KMAC_Hash.update`. + mac_len (integer): + Optional. The size of the authentication tag, in bytes. + Default is 64. Minimum is 8. + custom (bytes/bytearray/memoryview): + Optional. A customization byte string (``S`` in SP 800-185). + + Returns: + A :class:`KMAC_Hash` hash object + """ + + key = kwargs.pop("key", None) + if not is_bytes(key): + raise TypeError("You must pass a key to KMAC256") + if len(key) < 32: + raise ValueError("The key must be at least 256 bits long (32 bytes)") + + data = kwargs.pop("data", None) + + mac_len = kwargs.pop("mac_len", 64) + if mac_len < 8: + raise ValueError("'mac_len' must be 8 bytes or more") + + custom = kwargs.pop("custom", b"") + + if kwargs: + raise TypeError("Unknown parameters: " + str(kwargs)) + + return KMAC_Hash(data, key, mac_len, custom, "20", cSHAKE256, 136) |