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# SPDX-License-Identifier: MIT
"""
This module offers access to standardized parameters that you can load using
:meth:`argon2.PasswordHasher.from_parameters()`. See the `source code
<https://github.com/hynek/argon2-cffi/blob/main/src/argon2/profiles.py>`_ for
concrete values and :doc:`parameters` for more information.
.. versionadded:: 21.2.0
"""
from __future__ import annotations
from ._utils import Parameters
from .low_level import Type
# FIRST RECOMMENDED option per RFC 9106.
RFC_9106_HIGH_MEMORY = Parameters(
type=Type.ID,
version=19,
salt_len=16,
hash_len=32,
time_cost=1,
memory_cost=2097152, # 2 GiB
parallelism=4,
)
# SECOND RECOMMENDED option per RFC 9106.
RFC_9106_LOW_MEMORY = Parameters(
type=Type.ID,
version=19,
salt_len=16,
hash_len=32,
time_cost=3,
memory_cost=65536, # 64 MiB
parallelism=4,
)
# The pre-RFC defaults in argon2-cffi 18.2.0 - 21.1.0.
PRE_21_2 = Parameters(
type=Type.ID,
version=19,
salt_len=16,
hash_len=16,
time_cost=2,
memory_cost=102400, # 100 MiB
parallelism=8,
)
# Only for testing!
CHEAPEST = Parameters(
type=Type.ID,
version=19,
salt_len=8,
hash_len=4,
time_cost=1,
memory_cost=8,
parallelism=1,
)
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