o h@sddlZddlmZddlmZddlmZmZmZddl m Z ddl m Z m Z mZddlmZejZejZejZejZejZd eeefd ed efd d ZGdddZdS)N)Union)Literal) Parameters _check_typesextract_parameters) InvalidHash)Type hash_secret verify_secret)RFC_9106_LOW_MEMORYsencodingreturncCst|tr|S||S)zM Ensure *s* is a bytes string. Encode using *encoding* if it isn't. ) isinstancebytesencode)r rrR/var/www/html/env_mimamsha/lib/python3.10/site-packages/argon2/_password_hasher.py _ensure_bytess  rc@sLeZdZUdZddgZeed<eed<ee e e e de jfdedededed eded e fd d Zed eddfddZedefddZedefddZedefddZedefddZedefddZede fddZdeeefdefddZe je je jd Zd!eeefdeeefde d"fd#d$Z!d!ede"fd%d&Z#d'S)(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 Cs`t|tf|tf|tf|tf|tf|tf|tfd}|rt|t|d|||||d|_||_dS)N)rrrrrrr)rversionrrrrr)rintstrr TypeErrorrrr) selfrrrrrrrerrr__init__Ls*   zPasswordHasher.__init__paramsrcCs|}||_|S)z_ Construct a `PasswordHasher` from *params*. .. versionadded:: 21.2.0 )r)clsr&phrrrfrom_parametersnszPasswordHasher.from_parameterscC|jjSN)rrr#rrrrzzPasswordHasher.time_costcCr*r+)rrr,rrrr~r-zPasswordHasher.memory_costcCr*r+)rrr,rrrrr-zPasswordHasher.parallelismcCr*r+)rrr,rrrrr-zPasswordHasher.hash_lencCr*r+)rrr,rrrrr-zPasswordHasher.salt_lencCr*r+)rrr,rrrrr-zPasswordHasher.typepasswordc Cs6tt||jt|j|j|j|j|j |j d 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 )secretsaltrrrrrascii) r rrosurandomrrrrrrdecode)r#r.rrrhashs  zPasswordHasher.hash)s $argon2i$s $argon2d$s $argon2idr5Tc CsPt|d}z |j|dd}Wn tttfytwt|t||j|S)a Verify that *password* matches *hash*. .. warning:: It is assumed that the caller is in full control of the hash. No other parsing than the determination of the hash type is done by *argon2-cffi*. :param hash: An encoded hash as returned from :meth:`PasswordHasher.hash`. :type hash: ``bytes`` or ``str`` :param password: The password to verify. :type password: ``bytes`` or ``str`` :raises argon2.exceptions.VerifyMismatchError: If verification fails because *hash* is not valid for *password*. :raises argon2.exceptions.VerificationError: If verification fails for other reasons. :raises argon2.exceptions.InvalidHash: If *hash* is so clearly invalid, that it couldn't be passed to *Argon2*. :return: ``True`` on success, raise :exc:`~argon2.exceptions.VerificationError` otherwise. :rtype: bool .. versionchanged:: 16.1.0 Raise :exc:`~argon2.exceptions.VerifyMismatchError` on mismatches instead of its more generic superclass. .. versionadded:: 18.2.0 Hash type agility. r1N )r_header_to_type IndexErrorKeyError LookupErrorrr r)r#r5r. hash_typerrrverifys #zPasswordHasher.verifycCs|jt|kS)aO Check whether *hash* was created using the instance's parameters. Whenever your *Argon2* parameters -- or *argon2-cffi*'s defaults! -- change, you should rehash your passwords at the next opportunity. The common approach is to do that whenever a user logs in, since that should be the only time when you have access to the cleartext password. Therefore it's best practice to check -- and if necessary rehash -- passwords after each successful authentication. :rtype: bool .. versionadded:: 18.2.0 )rr)r#r5rrrcheck_needs_rehashsz!PasswordHasher.check_needs_rehashN)$__name__ __module__ __qualname____doc__ __slots__r__annotations__r!DEFAULT_TIME_COSTDEFAULT_MEMORY_COSTDEFAULT_PARALLELISMDEFAULT_HASH_LENGTHDEFAULT_RANDOM_SALT_LENGTHr IDr r% classmethodr)propertyrrrrrrrrr5IDr7rr<boolr=rrrrrsl ( "    -r)r2typingr_typingr_utilsrrr exceptionsr low_levelr r r profilesr rrHrrGrrDrrErrFrr!rrrrrrs