Node / dev / reticulum / files / RNS / Cryptography / PKCS7.py

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T8b949e# MIT License

T8b949e#

T8b949e# Copyright (c) 2022 Mark Qvist / unsigned.io

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Tff7b72class T56d364PKCS7Tb4b4b4:

Te6edf3BLOCKSIZE Tff7b72= T79c0ff16

Tf0883e@staticmethod

Tff7b72def Td2a8ffpadTb4b4b4(Te6edf3dataTb4b4b4, Te6edf3bsTff7b72=Te6edf3BLOCKSIZETb4b4b4)Tb4b4b4:

Te6edf3l Tff7b72= Tffa657lenTb4b4b4(Te6edf3dataTb4b4b4)

Te6edf3n Tff7b72= Te6edf3bsTff7b72-Te6edf3lTff7b72%Te6edf3bs

Te6edf3v Tff7b72= Tffa657bytesTb4b4b4(Tb4b4b4[Te6edf3nTb4b4b4]Tb4b4b4)

Tff7b72return Te6edf3dataTff7b72+Te6edf3vTff7b72*Te6edf3n

Tf0883e@staticmethod

Tff7b72def Td2a8ffunpadTb4b4b4(Te6edf3dataTb4b4b4, Te6edf3bsTff7b72=Te6edf3BLOCKSIZETb4b4b4)Tb4b4b4:

Te6edf3l Tff7b72= Tffa657lenTb4b4b4(Te6edf3dataTb4b4b4)

Te6edf3n Tff7b72= Te6edf3dataTb4b4b4[Tff7b72-T79c0ff1Tb4b4b4]

Tff7b72if Te6edf3n Tff7b72> Te6edf3bsTb4b4b4:

Tff7b72raise Tf85149ValueErrorTb4b4b4(Ta5d6ff"Ta5d6ffCannot unpad, invalid padding length of Ta5d6ff"Tff7b72+Tffa657strTb4b4b4(Te6edf3nTb4b4b4)Tff7b72+Ta5d6ff"Ta5d6ff bytesTa5d6ff"Tb4b4b4)

Tff7b72elseTb4b4b4:

Tff7b72return Te6edf3dataTb4b4b4[Tb4b4b4:Te6edf3lTff7b72-Te6edf3nTb4b4b4]