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    UhJ                     @   s<  d dl mZ d dlZd dlZd dlmZ d dlmZ ej	j
Zej	jZej	jZej	jZej	jZej	jZed Zej	jZej	jZej	jZej	jZej	jZ ej	j!Z"ej	j#Z$ej	j%Z&ej	j'Z(ej	j)Z*de$ Z+de& Z,e(e*ej-j.fde/de0d	e0d
e/de/dej-j1de0fddZ2e$e&fde0d
e/de/de0fddZ3de0de0de4fddZ5dS )    )castN)
exceptions)ensure      sizepasswordsaltopslimitmemlimitencoderreturnc           
      C   sz   t tdtjd t t|tkdtt|f tjd tj	||\}}}|d }	|
tjj||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raisingz.The salt must be exactly %s, not %s bytes longi      )maxmemdklen)r   	AVAILABLEexcUnavailableErrorlen	SALTBYTES
ValueErrornaclbindings nacl_bindings_pick_scrypt_paramsencode%crypto_pwhash_scryptsalsa208sha256_llr   int)
r   r   r	   r
   r   r   n_log2rpr    r#   E/var/www/html/venv/lib/python3.10/site-packages/nacl/pwhash/scrypt.pykdf;   s6   9


r%   c                 C   s    t tdtjd tj| ||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   &crypto_pwhash_scryptsalsa208sha256_str)r   r
   r   r#   r#   r$   str   s   r'   password_hashc                 C   s>   t tdtjd t t| tkdtjj tj	d tj
| |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   -crypto_pwhash_scryptsalsa208sha256_str_verify)r(   r   r#   r#   r$   verify   s   
r,   )6typingr   nacl.bindingsr   nacl.encodingr   r   nacl.exceptionsr   r   r*   _strbytes_plus_one&has_crypto_pwhash_scryptsalsa208sha256r   ,crypto_pwhash_scryptsalsa208sha256_STRPREFIX	STRPREFIX,crypto_pwhash_scryptsalsa208sha256_SALTBYTESr   -crypto_pwhash_scryptsalsa208sha256_PASSWD_MIN
PASSWD_MIN-crypto_pwhash_scryptsalsa208sha256_PASSWD_MAX
PASSWD_MAXr)   ,crypto_pwhash_scryptsalsa208sha256_BYTES_MIN	BYTES_MIN,crypto_pwhash_scryptsalsa208sha256_BYTES_MAX	BYTES_MAX/crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_MINMEMLIMIT_MIN/crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_MAXMEMLIMIT_MAX/crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_MINOPSLIMIT_MIN/crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_MAXOPSLIMIT_MAX7crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_INTERACTIVEOPSLIMIT_INTERACTIVE7crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_INTERACTIVEMEMLIMIT_INTERACTIVE5crypto_pwhash_scryptsalsa208sha256_OPSLIMIT_SENSITIVEOPSLIMIT_SENSITIVE5crypto_pwhash_scryptsalsa208sha256_MEMLIMIT_SENSITIVEMEMLIMIT_SENSITIVEOPSLIMIT_MODERATEMEMLIMIT_MODERATEencoding
RawEncoderr   bytesEncoderr%   r'   boolr,   r#   r#   r#   r$   <module>   st   
]
!