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#!/usr/bin/python3
#
#
# Formats a new test vector for ModExpNG core model.
#
#
# Copyright 2019 The Commons Conservancy Cryptech Project
# SPDX-License-Identifier: BSD-3-Clause
#
# 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.
#
# - 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 copyright holder 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
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
import sys
import vector_util
SCRIPT_USAGE = "USAGE: vector_format.py [openssl_binary]"
KEY_LENGTH = 512
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.")
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