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Filename :
scrypt.cpython-310.pyc
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o ��aJ � @ s< d dl mZ d dlZd dlZd dlmZ d dlmZ ej j Z ej j Z ej jZej jZej jZej jZe d Zej jZej jZej jZ ej j Z ej j Z ej j!Z"ej j#Z$ej j%Z&ej j'Z(ej j)Z*de$ Z+de& Z,e(e*ej-j.fde/de0d e0d e/d e/d ej-j1d e0fdd�Z2e$e&fde0d e/d e/d e0fdd�Z3de0de0d e4fdd�Z5dS )� )�castN)� exceptions)�ensure� � �size�password�salt�opslimit�memlimit�encoder�returnc C sz t tdtjd� t t|�tkdtt|�f tjd� tj� ||�\}}}|d } |� tjj ||t t d| �||| | d��S )al Derive a ``size`` bytes long key from a caller-supplied ``password`` and ``salt`` pair using the scryptsalsa208sha256 memory-hard construct. the enclosing module provides the constants - :py:const:`.OPSLIMIT_INTERACTIVE` - :py:const:`.MEMLIMIT_INTERACTIVE` - :py:const:`.OPSLIMIT_SENSITIVE` - :py:const:`.MEMLIMIT_SENSITIVE` - :py:const:`.OPSLIMIT_MODERATE` - :py:const:`.MEMLIMIT_MODERATE` as a guidance for correct settings respectively for the interactive login and the long term key protecting sensitive data use cases. :param size: derived key size, must be between :py:const:`.BYTES_MIN` and :py:const:`.BYTES_MAX` :type size: int :param password: password used to seed the key derivation procedure; it length must be between :py:const:`.PASSWD_MIN` and :py:const:`.PASSWD_MAX` :type password: bytes :param salt: **RANDOM** salt used in the key derivation procedure; its length must be exactly :py:const:`.SALTBYTES` :type salt: bytes :param opslimit: the time component (operation count) of the key derivation procedure's computational cost; it must be between :py:const:`.OPSLIMIT_MIN` and :py:const:`.OPSLIMIT_MAX` :type opslimit: int :param memlimit: the memory occupation component of the key derivation procedure's computational cost; it must be between :py:const:`.MEMLIMIT_MIN` and :py:const:`.MEMLIMIT_MAX` :type memlimit: int :rtype: bytes :raises nacl.exceptions.UnavailableError: If called when using a minimal build of libsodium. .. versionadded:: 1.2 � Not available in minimal build�Zraisingz.The salt must be exactly %s, not %s bytes longi � )�maxmemZdklen)r � AVAILABLE�exc�UnavailableError�len� SALTBYTES� ValueError�nacl�bindingsZ nacl_bindings_pick_scrypt_params�encodeZ%crypto_pwhash_scryptsalsa208sha256_llr �int) r r r r r r Zn_log2�r�pr � r �4/usr/lib/python3/dist-packages/nacl/pwhash/scrypt.py�kdf; s6 9� �� � ��r c C s t tdtjd� tj�| ||�S )a$ Hashes a password with a random salt, using the memory-hard scryptsalsa208sha256 construct and returning an ascii string that has all the needed info to check against a future password The default settings for opslimit and memlimit are those deemed correct for the interactive user login case. :param bytes password: :param int opslimit: :param int memlimit: :rtype: bytes :raises nacl.exceptions.UnavailableError: If called when using a minimal build of libsodium. .. versionadded:: 1.2 r r )r r r r r r Z&crypto_pwhash_scryptsalsa208sha256_str)r r r r r r �str� s ��r! � password_hashc C s> t tdtjd� t t| �tkdtjj tj d� tj� | |�S )aW Takes the output of scryptsalsa208sha256 and compares it against a user provided password to see if they are the same :param password_hash: bytes :param password: bytes :rtype: boolean :raises nacl.exceptions.UnavailableError: If called when using a minimal build of libsodium. .. versionadded:: 1.2 r r z/The password hash must be exactly %s bytes long) r r r r r � PWHASH_SIZEr r �+crypto_pwhash_scryptsalsa208sha256_STRBYTESr Z-crypto_pwhash_scryptsalsa208sha256_str_verify)r" r r r r �verify� s � ���r% )6�typingr Z nacl.bindingsr Z nacl.encodingr r Znacl.exceptionsr r r$ Z_strbytes_plus_oneZ&has_crypto_pwhash_scryptsalsa208sha256r Z,crypto_pwhash_scryptsalsa208sha256_STRPREFIXZ STRPREFIXZ,crypto_pwhash_scryptsalsa208sha256_SALTBYTESr Z-crypto_pwhash_scryptsalsa208sha256_PASSWD_MINZ PASSWD_MINZ-crypto_pwhash_scryptsalsa208sha256_PASSWD_MAXZ PASSWD_MAXr# Z,crypto_pwhash_scryptsalsa208sha256_BYTES_MINZ BYTES_MINZ,crypto_pwhash_scryptsalsa208sha256_BYTES_MAXZ BYTES_MAXZ/crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_MINZ MEMLIMIT_MINZ/crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_MAXZ MEMLIMIT_MAXZ/crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_MINZ OPSLIMIT_MINZ/crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_MAXZ OPSLIMIT_MAXZ7crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVEZOPSLIMIT_INTERACTIVEZ7crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVEZMEMLIMIT_INTERACTIVEZ5crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_SENSITIVEZOPSLIMIT_SENSITIVEZ5crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_SENSITIVEZMEMLIMIT_SENSITIVEZOPSLIMIT_MODERATEZMEMLIMIT_MODERATE�encodingZ RawEncoderr �bytesZEncoderr r! �boolr% r r r r �<module> st ����������� �]���� �!