o h@sddlmZmZmZddlmZddlmZddlm Z ddl m Z m Z m Z mZddlmZddlmZmZmZddlmZGd d d eZGd d d eZe eGd ddeZdS))absolute_importdivisionprint_function)Enum)range)utils)AlreadyFinalized InvalidKeyUnsupportedAlgorithm_Reasons) HMACBackend) constant_timehasheshmac)KeyDerivationFunctionc@seZdZdZdS)ModectrN)__name__ __module__ __qualname__ CounterModerrZ/var/www/html/env/lib/python3.10/site-packages/cryptography/hazmat/primitives/kdf/kbkdf.pyrsrc@seZdZdZdZdS)CounterLocation before_fixed after_fixedN)rrr BeforeFixed AfterFixedrrrrrsrc@s4eZdZddZddZddZddZd d Zd S) KBKDFHMACc CsBt| ts tdtjt|tjstdtj| |s"tdtjt|t s+t dt|t s4t d|s8|r>| r>t d|dusG| |sKt d|durW| durWt d|durdt|tsdt d |durjd }|durpd }t|trzt|ts~t d ||_||_||_||_||_||_||_||_| |_d |_| |_dS) Nz.Backend object does not implement HMACBackend.z5Algorithm supplied is not a supported hash algorithm.z5Algorithm supplied is not a supported hmac algorithm.zmode must be of type Modez(location must be of type CounterLocationz9When supplying fixed data, label and context are ignored.zrlen must be between 1 and 4zPlease specify an llenzllen must be an integerz'label and context must be of type bytesF) isinstancer r r BACKEND_MISSING_INTERFACEr HashAlgorithmUNSUPPORTED_HASHhmac_supportedr TypeErrorr ValueError_valid_byte_lengthintbytes _algorithm_mode_length_rlen_llen _location_label_context_backend_used _fixed_data) self algorithmmodelengthrlenllenlocationlabelcontextfixedbackendrrr__init__s\        zKBKDFHMAC.__init__cCsBt|ts tdtd|}dt|krdksdSdSdS)Nzvalue must be of type intFT)r r(r%r int_to_byteslen)r5value value_binrrrr'\s  zKBKDFHMAC._valid_byte_lengthcCs|jrtt|tstdd|_|j |jj }dg}t d|j }|t dt |ddkr5t dtd|dD]7}tj||j|jd}t ||j }|jtjkrZ|||||jtjkrl||||qs