= bddlZddlmZddlmZddlmZmZmZddl m Z ddl m Z m Z mZddlmZejZejZejZejZejZd eeefd ed efd ZGd dZdS)N)Union)Literal) Parameters _check_typesextract_parameters) InvalidHash)Type hash_secret verify_secret)RFC_9106_LOW_MEMORYsencodingreturncZt|tr|S||S)zM Ensure *s* is a bytes string. Encode using *encoding* if it isn't. ) isinstancebytesencode)rrs 7lib/python3.11/site-packages/argon2/_password_hasher.py _ensure_bytesrs-!U 88H  ceZdZUdZddgZeed<eed<ee e e e de jfdedededed eded e fd Zed ed dfdZed efdZed efdZed efdZed efdZed efdZed e fdZdeeefd efdZe je je jdZdeeefdeeefd e dfdZ!ded e"fdZ#dS)PasswordHashera High level class to hash passwords with sensible defaults. Uses Argon2\ **id** by default and always uses a random salt_ for hashing. But it can verify any type of *Argon2* as long as the hash is correctly encoded. The reason for this being a class is both for convenience to carry parameters and to verify the parameters only *once*. Any unnecessary slowdown when hashing is a tangible advantage for a brute force attacker. :param int time_cost: Defines the amount of computation realized and therefore the execution time, given in number of iterations. :param int memory_cost: Defines the memory usage, given in kibibytes_. :param int parallelism: Defines the number of parallel threads (*changes* the resulting hash value). :param int hash_len: Length of the hash in bytes. :param int salt_len: Length of random salt to be generated for each password. :param str encoding: The *Argon2* C library expects bytes. So if :meth:`hash` or :meth:`verify` are passed a ``str``, it will be encoded using this encoding. :param Type type: *Argon2* type to use. Only change for interoperability with legacy systems. .. versionadded:: 16.0.0 .. versionchanged:: 18.2.0 Switch from Argon2i to Argon2id based on the recommendation by the current RFC draft. See also :doc:`parameters`. .. versionchanged:: 18.2.0 Changed default *memory_cost* to 100 MiB and default *parallelism* to 8. .. versionchanged:: 18.2.0 ``verify`` now will determine the type of hash. .. versionchanged:: 18.3.0 The *Argon2* type is configurable now. .. versionadded:: 21.2.0 :meth:`from_parameters` .. versionchanged:: 21.2.0 Changed defaults to :data:`argon2.profiles.RFC_9106_LOW_MEMORY`. .. _salt: https://en.wikipedia.org/wiki/Salt_(cryptography) .. _kibibytes: https://en.wikipedia.org/wiki/Binary_prefix#kibi _parametersrzutf-8 time_cost memory_cost parallelismhash_lensalt_lentypec t|tf|tf|tf|tf|tf|tf|tf}|rt |t |d||||||_||_dS)N)rrrrrrr )r versionrrrrr)rintstrr TypeErrorrrr) selfrrrrrrr es r__init__zPasswordHasher.__init__Ls  #&$c*$c*___     A,, &##   ! rparamsrc(|}||_|S)z_ Construct a `PasswordHasher` from *params*. .. versionadded:: 21.2.0 )r)clsr*phs rfrom_parameterszPasswordHasher.from_parametersnsSUU rc|jjSN)rrr's rrzPasswordHasher.time_costzs))rc|jjSr0)rrr1s rrzPasswordHasher.memory_cost~++rc|jjSr0)rrr1s rrzPasswordHasher.parallelismr3rc|jjSr0)rrr1s rrzPasswordHasher.hash_len((rc|jjSr0)rrr1s rrzPasswordHasher.salt_lenr6rc|jjSr0)rr r1s rr zPasswordHasher.types$$rpasswordc tt||jtj|j|j|j|j|j |j  dS)z Hash *password* and return an encoded hash. :param password: Password to hash. :type password: ``bytes`` or ``str`` :raises argon2.exceptions.HashingError: If hashing fails. :rtype: str )secretsaltrrrrr ascii) r rrosurandomrrrrrr decode)r'r9s rhashzPasswordHasher.hashsa 4=99DM**n((]    &// r)s $argon2i$s $argon2d$s $argon2idrATct|d} |j|dd}n)#tttf$rt wxYwt |t||j|S)a Verify that *password* matches *hash*. .. warning:: It is assumed that the caller is in full control of the hash. No other parsing than the determination of the hash type is done by *argon2-cffi*. :param hash: An encoded hash as returned from :meth:`PasswordHasher.hash`. :type hash: ``bytes`` or ``str`` :param password: The password to verify. :type password: ``bytes`` or ``str`` :raises argon2.exceptions.VerifyMismatchError: If verification fails because *hash* is not valid for *password*. :raises argon2.exceptions.VerificationError: If verification fails for other reasons. :raises argon2.exceptions.InvalidHash: If *hash* is so clearly invalid, that it couldn't be passed to *Argon2*. :return: ``True`` on success, raise :exc:`~argon2.exceptions.VerificationError` otherwise. :rtype: bool .. versionchanged:: 16.1.0 Raise :exc:`~argon2.exceptions.VerifyMismatchError` on mismatches instead of its more generic superclass. .. versionadded:: 18.2.0 Hash type agility. r=N )r_header_to_type IndexErrorKeyError LookupErrorr r r)r'rAr9 hash_types rverifyzPasswordHasher.verifysFT7++ ,T"1"X6IIHk2   --   -$-88)   s (&Ac2|jt|kS)aO Check whether *hash* was created using the instance's parameters. Whenever your *Argon2* parameters -- or *argon2-cffi*'s defaults! -- change, you should rehash your passwords at the next opportunity. The common approach is to do that whenever a user logs in, since that should be the only time when you have access to the cleartext password. Therefore it's best practice to check -- and if necessary rehash -- passwords after each successful authentication. :rtype: bool .. versionadded:: 18.2.0 )rr)r'rAs rcheck_needs_rehashz!PasswordHasher.check_needs_rehashs"#5d#;#;;;rN)$__name__ __module__ __qualname____doc__ __slots__r__annotations__r%DEFAULT_TIME_COSTDEFAULT_MEMORY_COSTDEFAULT_PARALLELISMDEFAULT_HASH_LENGTHDEFAULT_RANDOM_SALT_LENGTHr IDr$r) classmethodr.propertyrrrrrr rrrAIDrDrrIboolrKrrrrs''P +IMMM+..+2W ! ! ! ! !  !  ! ! ! ! ! !D Z 4D   [ *3***X*,S,,,X,,S,,,X,)#)))X))#)))X)%d%%%X%U3:.3,ffgO + #u*%+ 16sEz1B+ + + + + Ztypingr_typingr_utilsrrr exceptionsr low_levelr r r profilesr rrVrrUrrRrrSrrTrr%rrr]rrrds1 @@@@@@@@@@######7777777777))))))19)2'1)5)5U5#:&#%M<M<M<M<M<M<M<M<M<M