path: root/vector/vector_format.py

#!/usr/bin/python3
#
#
# Formats a new test vector for ModExpNG core model.
#
#
# Copyright (c) 2019, NORDUnet A/S
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# - Redistributions of source code must retain the above copyright notice,
#   this list of conditions and the following disclaimer.
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# - Redistributions in binary form must reproduce the above copyright
#   notice, this list of conditions and the following disclaimer in the
#   documentation and/or other materials provided with the distribution.
#
# - Neither the name of the NORDUnet nor the names of its contributors may
#   be used to endorse or promote products derived from this software
#   without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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#

import sys
import vector_util

SCRIPT_USAGE = "USAGE: vector_format.py [openssl_binary]"

KEY_LENGTH = 1024

RNG_SEED_MESSAGE = 1
RNG_SEED_BLINDING = 2


if __name__ == "__main__":

    # ModInv fails otherwise...
    sys.setrecursionlimit(int(1.5 * KEY_LENGTH))

    OPENSSL_BINARY = vector_util.openssl_binary(SCRIPT_USAGE)

    if len(OPENSSL_BINARY) > 0:

        MESSAGE  = vector_util.random_message(RNG_SEED_MESSAGE, KEY_LENGTH)
        BLINDING = vector_util.random_blinding(RNG_SEED_BLINDING, KEY_LENGTH)
        VECTOR   = vector_util.load_vector(OPENSSL_BINARY, KEY_LENGTH)

        vector_ok = VECTOR.selfcheck(MESSAGE, BLINDING)
        if vector_ok:
            vector_util.save_vector(VECTOR)
            print("Test vector formatted.")
        else:
            print("Failed to format test vector.")