crypto.py 文件源码

def __decrypt_with_rsa(self, content, user_sk):
        """ Decrypt RSAES-OAEP encrypted content (single block)

        @developer: vsmysle

        This method decrypts a single RSA ciphertext block only

        :param content: bytes content to decrypt
        :param user_sk: instance of cryptography.hazmat.primitives.rsa
                        .RSAPrivateKey to use for a decryption

        :return: string decryption of an input content

        """
        # TODO: add exceptions

        self.logger.debug("rsa decryption")
        try:
            plaintext = user_sk.decrypt(
                content, asym_padding.OAEP(
                    mgf=asym_padding.MGF1(algorithm=SHA1()),
                    algorithm=SHA1(),
                    label=None
                )
            )
        except InvalidKey:
            self.logger.warning("Invalid key!")
            return
        return plaintext