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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
|
| import dataclasses
|
| from ._utils import Parameters, _is_wasm
| from .low_level import Type
|
|
| def get_default_parameters() -> Parameters:
| """
| Create default parameters for current platform.
|
| Returns:
| Default, compatible, parameters for current platform.
|
| .. versionadded:: 25.1.0
| """
| params = RFC_9106_LOW_MEMORY
|
| if _is_wasm():
| params = dataclasses.replace(params, parallelism=1)
|
| return params
|
|
| # 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,
| )
|
|
