pdfdocument.py 文件源码

def authenticate(self, password):
        password = password.encode('utf-8')[:127]
        hash = SHA256.new(password)
        hash.update(self.o_validation_salt)
        hash.update(self.u)
        if hash.digest() == self.o_hash:
            hash = SHA256.new(password)
            hash.update(self.o_key_salt)
            hash.update(self.u)
            return AES.new(hash.digest(), mode=AES.MODE_CBC, IV=b'\x00' * 16).decrypt(self.oe)
        hash = SHA256.new(password)
        hash.update(self.u_validation_salt)
        if hash.digest() == self.u_hash:
            hash = SHA256.new(password)
            hash.update(self.u_key_salt)
            return AES.new(hash.digest(), mode=AES.MODE_CBC, IV=b'\x00' * 16).decrypt(self.ue)
        return None