o j @sddlmZddlZddlmZddlmZmZddlm Z m Z Gdddej dZ Gd d d e ej dZ Gd d d e ej dZGd dde ej dZGddde ej dZd#ddZd$ddZd%dd Zd&d!d"ZdS)') annotationsN)utils)UnsupportedAlgorithm_Reasons)BlockCipherAlgorithmCipherAlgorithmc@s0eZdZeejd ddZejd dd Zd S) ModereturnstrcCdS)z@ A string naming this mode (e.g. "ECB", "CBC"). Nselfr r k/var/www/html/fyndo/pharma/fyndo/venv/lib/python3.10/site-packages/cryptography/hazmat/primitives/_modes.pynamez Mode.name algorithmrNonecCr )zq Checks that all the necessary invariants of this (mode, algorithm) combination are met. Nr rrr r rvalidate_for_algorithmrzMode.validate_for_algorithmN)r r )rrr r)__name__ __module__ __qualname__propertyabcabstractmethodrrr r r rrs r) metaclassc@ eZdZeejdddZdS)ModeWithInitializationVectorr utils.BuffercCr )zP The value of the initialization vector for this mode as bytes. Nr r r r rinitialization_vector"rz2ModeWithInitializationVector.initialization_vectorNr r)rrrrrrr r r r rr!rc@r) ModeWithTweakr rcCr )z@ The value of the tweak for this mode as bytes. Nr r r r rtweak+rzModeWithTweak.tweakNr!)rrrrrrr$r r r rr#*r"r#c@r) ModeWithNoncer rcCr )z@ The value of the nonce for this mode as bytes. Nr r r r rnonce4rzModeWithNonce.nonceNr!)rrrrrrr&r r r rr%3r"r%c@r)ModeWithAuthenticationTagr bytes | NonecCr )zP The value of the tag supplied to the constructor of this mode. Nr r r r rtag=rzModeWithAuthenticationTag.tagN)r r()rrrrrrr)r r r rr'<r"r'rrrr rcCs$|jdkr|jdkrtddSdS)NAESz=Only 128, 192, and 256 bit keys are allowed for this AES mode)key_sizer ValueErrorrr r r_check_aes_key_lengthEs r.rcCs4t|j}|d|jkrtd|d|jddS)NzInvalid IV size () for .)lenr block_sizer-r)rriv_lenr r r_check_iv_lengthLs r5r&rrr cCsLt|tst|dtjt|d|jkr$tdt|d|ddS)N" requires a block cipher algorithmr/zInvalid nonce size (r0r1) isinstancerrrUNSUPPORTED_CIPHERr2r3r-)r&rrr r r_check_nonce_lengthTs r9cCs4t|tst|dtjt||t||dS)Nr6)r7rrrr8r.r5rr r r_check_iv_and_key_length`s  r:)rrrrr r)rrrrr r)r&rrr rrr r)rrrrr r) __future__rr cryptographyrcryptography.exceptionsrr/cryptography.hazmat.primitives._cipheralgorithmrrABCMetarrr#r%r'r.r5r9r:r r r rs