o -i"@sddlmZddlZddlmZmZddlmZmZm Z m Z ddl m Z ddl mZmZmZddlmZeZejZejZejZejZejZdddZGdddZdS)) annotationsN)ClassVarLiteral) Parameters _check_typesextract_parametersvalidate_params_for_platform)InvalidHashError)Type hash_secret verify_secret)get_default_parameterss bytes | strencodingstrreturnbytescCst|tr|S||S)zM Ensure *s* is a bytes string. Encode using *encoding* if it isn't. ) isinstancerencode)rrre/home/esfera/Desktop/Rishu/Inhouse_Email/venv/lib/python3.10/site-packages/argon2/_password_hasher.py _ensure_bytess  rc@seZdZUdZddgZded<ded<eeee e de j fd3ddZ ed4ddZed5ddZed5ddZed5ddZed5ddZed5ddZed6dd Zd!d"d7d'd(Ze je je j d)Zd*ed+<d8d.d/Zd9d1d2Zd!S):PasswordHashera High level class to hash passwords with sensible defaults. Uses Argon2\ **id** by default and 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. Args: time_cost: Defines the amount of computation realized and therefore the execution time, given in number of iterations. memory_cost: Defines the memory usage, given in kibibytes_. parallelism: Defines the number of parallel threads (*changes* the resulting hash value). hash_len: Length of the hash in bytes. salt_len: Length of random salt to be generated for each password. 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. 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 _parametersrrrzutf-8 time_costint memory_cost parallelismhash_lensalt_lentyper c Cslt|tf|tf|tf|tf|tf|tf|tfd}|rt|t|d|||||d} t| | |_||_dS)N)rrrr r!rr")r"versionr!r rrr) rrrr TypeErrorrr rr) selfrrrr r!rr"eparamsrrr__init__^s.    zPasswordHasher.__init__r(rcCs ||j|j|j|j|j|jdS)z Construct a `PasswordHasher` from *params*. Returns: A `PasswordHasher` instance with the parameters from *params*. .. versionadded:: 21.2.0 rrrr r!r"r*)clsr(rrrfrom_parameterss zPasswordHasher.from_parameterscC|jjSN)rrr&rrrrzPasswordHasher.time_costcCr-r.)rrr/rrrrr0zPasswordHasher.memory_costcCr-r.)rrr/rrrrr0zPasswordHasher.parallelismcCr-r.)rr r/rrrr r0zPasswordHasher.hash_lencCr-r.)rr!r/rrrr!r0zPasswordHasher.salt_lencCr-r.)rr"r/rrrr"r0zPasswordHasher.typeN)saltpassword str | bytesr1 bytes | Nonec Cs:tt||j|p t|j|j|j|j|j |j d dS)a Hash *password* and return an encoded hash. Args: password: Password to hash. salt: If None, a random salt is securely created. .. danger:: You should **not** pass a salt unless you really know what you are doing. Raises: argon2.exceptions.HashingError: If hashing fails. Returns: Hashed *password*. .. versionadded:: 23.1.0 *salt* parameter )secretr1rrrr r"ascii) r rrosurandomr!rrrr r"decode)r&r2r1rrrhashs zPasswordHasher.hash)s $argon2i$s $argon2d$s $argon2idzClassVar[dict[bytes, Type]]_header_to_typer: Literal[True]cCsJt|d}z |j|dd}Wn tytdwt|t||j|S)ak 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*. Args: hash: An encoded hash as returned from :meth:`PasswordHasher.hash`. password: The password to verify. Raises: argon2.exceptions.VerifyMismatchError: If verification fails because *hash* is not valid for *password*. argon2.exceptions.VerificationError: If verification fails for other reasons. argon2.exceptions.InvalidHashError: If *hash* is so clearly invalid, that it couldn't be passed to Argon2. Returns: ``True`` on success, otherwise an exception is raised. .. versionchanged:: 16.1.0 Raise :exc:`~argon2.exceptions.VerifyMismatchError` on mismatches instead of its more generic superclass. .. versionadded:: 18.2.0 Hash type agility. r6N )rr; LookupErrorr r r)r&r:r2 hash_typerrrverifys % zPasswordHasher.verifyboolcCs"t|tr |d}|jt|kS)a 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. Args: hash: An encoded Argon2 password hash. Returns: Whether *hash* was created using the instance's parameters. .. versionadded:: 18.2.0 .. versionchanged:: 24.1.0 Accepts bytes for *hash*. r6)rrr9rr)r&r:rrrcheck_needs_rehashs  z!PasswordHasher.check_needs_rehash)rrrrrrr rr!rrrr"r )r(rrr)rr)rr )r2r3r1r4rr)r:r3r2r3rr<)r:r3rrA)__name__ __module__ __qualname____doc__ __slots____annotations__DEFAULT_TIME_COSTDEFAULT_MEMORY_COSTDEFAULT_PARALLELISMDEFAULT_HASH_LENGTHDEFAULT_RANDOM_SALT_LENGTHr IDr) classmethodr,propertyrrrr r!r"r:IDr;r@rBrrrrr&sD 2 &       " /r)rrrrrr) __future__rr7typingrr_utilsrrrr exceptionsr low_levelr r r profilesrdefault_paramsr!rMr rLrrIrrJrrKrrrrrrs