3 uQhB ã @s–dZddlZddlZddlZddlmZejeƒZyddl Z ej dƒWn:e k r‚dZ ej rtej rtej dƒn ej dƒYnXGdd „d ƒZdS) z¶ AES IGE implementation in Python. If available, cryptg will be used instead, otherwise if available, libssl will be used instead, otherwise the Python implementation will be used. éNé)Úlibsslz/cryptg detected, it will be used for encryptionz/libssl detected, it will be used for encryptionz\cryptg module not installed and libssl not found, falling back to (slower) Python encryptionc@s(eZdZdZedd„ƒZedd„ƒZdS)ÚAESzf Class that servers as an interface to encrypt and decrypt text through the AES IGE mode. c Cstrtj|||ƒStjr&tj|||ƒS|dt|ƒd…}|t|ƒdd…}tj|ƒ}g}t|ƒd}dgd}x”t|ƒD]ˆ} x,tdƒD] } || d| || A|| <qŠW|j|ƒ} x$tdƒD]} | | || N<qÂW|| d| dd…}| }|j| ƒq|Wt |ƒS)z Decrypts the given text in 16-bytes blocks by using the given key and 32-bytes initialization vector. Néér) ÚcryptgÚ decrypt_igerÚlenÚpyaesrÚrangeZdecryptÚextendÚbytes) Ú cipher_textÚkeyÚivÚiv1Úiv2ÚaesÚ plain_textÚ blocks_countÚcipher_text_blockÚ block_indexÚiÚplain_text_block©rú7/tmp/pip-build-2nz6shyl/telethon/telethon/crypto/aes.pyr"s(     zAES.decrypt_igec Cs<t|ƒd}|r"|tjd|ƒ7}tr4tj|||ƒStjrHtj|||ƒS|dt|ƒd…}|t|ƒdd…}tj|ƒ}g}t|ƒd}x¨t|ƒD]œ} t || d| dd…ƒ} x$tdƒD]} | | || N<q¾W|j | ƒ} x$tdƒD]} | | || N<qîW| }|| d| dd…}|j | ƒq”Wt |ƒS)z Encrypts the given text in 16-bytes blocks by using the given key and 32-bytes initialization vector. rNr) r ÚosÚurandomrÚ encrypt_igerr rr ÚlistZencryptr r ) rrrÚpaddingrrrrrrrrrrrrrGs0    zAES.encrypt_igeN)Ú__name__Ú __module__Ú __qualname__Ú__doc__Ú staticmethodrrrrrrrs %r)r$rr ÚloggingÚrÚ getLoggerr!Z__log__rÚinfoÚ ImportErrorrrrrrrrÚs