/* * Copyright (c) 2014-2017 Dag-Erling Smørgrav * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. The name of the author may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. */ #include "cryb/impl.h" #include #include #include #include #include #include #include #include "t_mpi.h" /*************************************************************************** * Addition */ static struct t_add_case { const char *desc; uint8_t a[16]; size_t amsb; int aneg:1; uint8_t b[16]; size_t bmsb; int bneg:1; uint8_t e[16]; size_t emsb; int eneg:1; } t_add_cases[] = { { "|0| + |0| == 0", { }, 0, 0, { }, 0, 0, { }, 0, 0, }, { "|0| + |1| == 1", { }, 0, 0, { 0x01 }, 1, 0, { 0x01 }, 1, 0, }, { "|1| + |0| == 1", { 0x01 }, 1, 0, { }, 0, 0, { 0x01 }, 1, 0, }, { "|1| + |1| == 2", { 0x01 }, 1, 0, { 0x01 }, 1, 0, { 0x02 }, 2, 0, }, { "|0| + |-1| == 1", { }, 0, 0, { 0x01 }, 1, 1, { 0x01 }, 1, 0, }, { "|-1| + |0| == 1", { 0x01 }, 1, 1, { }, 0, 0, { 0x01 }, 1, 0, }, { "|-1| + |-1| == 2", { 0x01 }, 1, 1, { 0x01 }, 1, 1, { 0x02 }, 2, 0, }, { "|0x20140901| + |0x19700101| == 0x39840a02", { 0x20, 0x14, 0x09, 0x01 }, 30, 0, { 0x19, 0x70, 0x01, 0x01 }, 29, 0, { 0x39, 0x84, 0x0a, 0x02 }, 30, 0, }, { "|-0x20140901| + |0x19700101| == 0x39840a02", { 0x20, 0x14, 0x09, 0x01 }, 30, 1, { 0x19, 0x70, 0x01, 0x01 }, 29, 0, { 0x39, 0x84, 0x0a, 0x02 }, 30, 0, }, { "|0x20140901| + |-0x19700101| == 0x39840a02", { 0x20, 0x14, 0x09, 0x01 }, 30, 0, { 0x19, 0x70, 0x01, 0x01 }, 29, 1, { 0x39, 0x84, 0x0a, 0x02 }, 30, 0, }, { "|-0x20140901| + |-0x19700101| == 0x39840a02", { 0x20, 0x14, 0x09, 0x01 }, 30, 1, { 0x19, 0x70, 0x01, 0x01 }, 29, 1, { 0x39, 0x84, 0x0a, 0x02 }, 30, 0, }, { "simple carry, " "|0xffffffff| + |0x01| == 0x0100000000", { 0xff, 0xff, 0xff, 0xff }, 32, 0, { 0x01 }, 1, 0, { 0x01, 0x00, 0x00, 0x00, 0x00 }, 33, 0, }, { "complex carry, " "|0x0100000000ffffffff| + |0x01| == 0x010000000100000000", { 0x01, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff }, 64, 0, { 0x01 }, 1, 0, { 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00 }, 64, 0, }, }; static int t_mpi_add_tc(char **desc CRYB_UNUSED, void *arg) { struct t_add_case *tc = arg; cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, tc->a, (tc->amsb + 7) / 8); a.neg = tc->aneg; mpi_load(&b, tc->b, (tc->bmsb + 7) / 8); b.neg = tc->bneg; mpi_load(&e, tc->e, (tc->emsb + 7) / 8); e.neg = tc->eneg; ret &= t_compare_i(0, mpi_add_abs(&x, &a, &b)); ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * All operands are different */ static int t_mpi_add(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x20140901); mpi_set(&e, 0x19700101 + 0x20140901); ret &= t_compare_i(0, mpi_add_abs(&x, &a, &b)); ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * As above, but first allocation will fail */ static int t_mpi_add_fail1(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, large_v, sizeof large_v); mpi_set(&b, 0x19700101); mpi_set(&x, 0x20140901); mpi_set(&e, 0x20140901); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_add_abs(&x, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * As above, but second allocation will fail */ static int t_mpi_add_fail2(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_load(&b, large_v, sizeof large_v); mpi_set(&x, 0x20140901); mpi_set(&e, 0x20140901); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_add_abs(&x, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * Target is the first operand */ static int t_mpi_add_b_to_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x20140901); mpi_set(&e, 0x19700101 + 0x20140901); ret &= t_compare_i(0, mpi_add_abs(&a, &a, &b)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_add_b_to_a_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_load(&b, large_v, sizeof large_v); mpi_set(&e, 0x19700101); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_add_abs(&a, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is the first operand and both operands are equal */ static int t_mpi_add_b_to_a_equal(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x19700101); mpi_set(&e, 0x19700101 + 0x19700101); ret &= t_compare_i(0, mpi_add_abs(&a, &a, &b)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is the second operand */ static int t_mpi_add_a_to_b(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x20140901); mpi_set(&e, 0x19700101 + 0x20140901); ret &= t_compare_i(0, mpi_add_abs(&b, &a, &b)); ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_add_a_to_b_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, large_v, sizeof large_v); mpi_set(&b, 0x20140901); mpi_set(&e, 0x20140901); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_add_abs(&b, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is the second operand and both operands are equal */ static int t_mpi_add_a_to_b_equal(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x19700101); mpi_set(&e, 0x19700101 + 0x19700101); ret &= t_compare_i(0, mpi_add_abs(&b, &a, &b)); ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is both operands */ static int t_mpi_add_a_to_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&e, 0x19700101 + 0x19700101); ret &= t_compare_i(0, mpi_add_abs(&a, &a, &a)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&e); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_add_a_to_a_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, large_v, sizeof large_v); mpi_load(&e, large_v, sizeof large_v); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_add_abs(&a, &a, &a)); --t_malloc_fail; ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&e); return (ret); } /* * Operands are the same */ static int t_mpi_add_a_and_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&e, 0x19700101 + 0x19700101); ret &= t_compare_i(0, mpi_add_abs(&b, &a, &a)); ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_add_a_and_a_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, large_v, sizeof large_v); mpi_set(&b, 0x20140901); mpi_set(&e, 0x20140901); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_add_abs(&b, &a, &a)); --t_malloc_fail; ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); return (ret); } /* * Target is the first operand, second operand is zero */ static int t_mpi_add_zero_to_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_zero(&b); mpi_copy(&e, &a); ret &= t_compare_i(0, mpi_add_abs(&a, &a, &b)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is the second operand, first operand is zero */ static int t_mpi_add_zero_to_b(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_zero(&a); mpi_set(&b, 0x20140901); mpi_copy(&e, &b); ret &= t_compare_i(0, mpi_add_abs(&b, &a, &b)); ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /*************************************************************************** * Subtraction */ static struct t_sub_case { const char *desc; uint8_t a[16]; size_t amsb; int aneg:1; uint8_t b[16]; size_t bmsb; int bneg:1; uint8_t e[16]; size_t emsb; int eneg:1; } t_sub_cases[] = { { "| |0| - |0| | == 0", { }, 0, 0, { }, 0, 0, { }, 0, 0, }, { "| |0| - |1| | == 1", { }, 0, 0, { 0x01 }, 1, 0, { 0x01 }, 1, 0, }, { "| |1| - |0| | == 1", { 0x01 }, 1, 0, { }, 0, 0, { 0x01 }, 1, 0, }, { "| |1| - |1| | == 0", { 0x01 }, 1, 0, { 0x01 }, 1, 0, { }, 0, 0, }, { "| |0| - |-1| | == 1", { }, 0, 0, { 0x01 }, 1, 1, { 0x01 }, 1, 0, }, { "| |-1| - |0| | == 1", { 0x01 }, 1, 1, { }, 0, 0, { 0x01 }, 1, 0, }, { "| |-1| - |-1| | == 0", { 0x01 }, 1, 1, { 0x01 }, 1, 1, { }, 0, 0, }, { "| |4| - |2| | == 2", { 0x04 }, 3, 0, { 0x02 }, 2, 0, { 0x02 }, 2, 0, }, { "| |2| - |4| | == 2", { 0x02 }, 2, 0, { 0x04 }, 3, 0, { 0x02 }, 2, 0, }, { "| |0x20140901| - |0x19700101| | == 0x6a40800", { 0x20, 0x14, 0x09, 0x01 }, 30, 0, { 0x19, 0x70, 0x01, 0x01 }, 29, 0, { 0x06, 0xa4, 0x08, 0x00 }, 27, 0, }, { "| |-0x20140901| - |0x19700101| | == 0x6a40800", { 0x20, 0x14, 0x09, 0x01 }, 30, 1, { 0x19, 0x70, 0x01, 0x01 }, 29, 0, { 0x06, 0xa4, 0x08, 0x00 }, 27, 0, }, { "| |0x20140901| - |-0x19700101| | == 0x6a40800", { 0x20, 0x14, 0x09, 0x01 }, 30, 0, { 0x19, 0x70, 0x01, 0x01 }, 29, 1, { 0x06, 0xa4, 0x08, 0x00 }, 27, 0, }, { "| |-0x20140901| - |-0x19700101| | == 0x6a40800", { 0x20, 0x14, 0x09, 0x01 }, 30, 1, { 0x19, 0x70, 0x01, 0x01 }, 29, 1, { 0x06, 0xa4, 0x08, 0x00 }, 27, 0, }, { "0x120140901 - 0x119700101 == 0x6a40800", { 0x01, 0x20, 0x14, 0x09, 0x01 }, 33, 0, { 0x01, 0x19, 0x70, 0x01, 0x01 }, 33, 0, { 0x06, 0xa4, 0x08, 0x00 }, 27, 0, }, { "0x119700101 - 0x120140901 == 0x6a40800", { 0x01, 0x19, 0x70, 0x01, 0x01 }, 33, 0, { 0x01, 0x20, 0x14, 0x09, 0x01 }, 33, 0, { 0x06, 0xa4, 0x08, 0x00 }, 27, 0, }, { "simple carry, " "0x1000000000 - 0xfffffffff == 0x01", { 0x10, 0x00, 0x00, 0x00, 0x00 }, 37, 0, { 0x0f, 0xff, 0xff, 0xff, 0xff }, 36, 0, { 0x01 }, 1, 0, }, { "simple carry, " "0x1000000000 - 0x01 == 0xfffffffff", { 0x10, 0x00, 0x00, 0x00, 0x00 }, 37, 0, { 0x01 }, 1, 0, { 0x0f, 0xff, 0xff, 0xff, 0xff }, 36, 0, }, { "complex carry, " "0x010000000000000000 - 0xffffffffffffffff == 0x01", { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 65, 0, { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, 64, 0, { 0x01 }, 1, 0, }, { "complex carry, " "0x010000000000000000 - 0x01 == 0xffffffffffffffff", { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 65, 0, { 0x01 }, 1, 0, { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, 64, 0, }, }; static int t_mpi_sub_tc(char **desc CRYB_UNUSED, void *arg) { struct t_sub_case *tc = arg; cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, tc->a, (tc->amsb + 7) / 8); a.neg = tc->aneg; mpi_load(&b, tc->b, (tc->bmsb + 7) / 8); b.neg = tc->bneg; mpi_load(&e, tc->e, (tc->emsb + 7) / 8); e.neg = tc->eneg; ret &= t_compare_i(0, mpi_sub_abs(&x, &a, &b)); ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * All operands are different */ static int t_mpi_sub(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x20140901); mpi_set(&e, 0x20140901 - 0x19700101); ret &= t_compare_i(0, mpi_sub_abs(&x, &a, &b)); ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_sub_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, small_v, sizeof small_v); mpi_load(&b, large_v, sizeof large_v); mpi_set(&x, 0x20140901); mpi_set(&e, 0x20140901); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_sub_abs(&x, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /* * Target is the first operand */ static int t_mpi_sub_b_from_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x20140901); mpi_set(&b, 0x19700101); mpi_set(&e, 0x20140901 - 0x19700101); ret &= t_compare_i(0, mpi_sub_abs(&a, &a, &b)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_sub_b_from_a_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_load(&b, large_v, sizeof large_v); mpi_set(&e, 0x19700101); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_sub_abs(&a, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is the second operand */ static int t_mpi_sub_a_from_b(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&b, 0x20140901); mpi_set(&e, 0x20140901 - 0x19700101); ret &= t_compare_i(0, mpi_sub_abs(&b, &a, &b)); ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * As above, but allocation will fail */ static int t_mpi_sub_a_from_b_fail(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_load(&a, large_v, sizeof large_v); mpi_set(&b, 0x20140901); mpi_set(&e, 0x20140901); ++t_malloc_fail; ret &= t_compare_i(-1, mpi_sub_abs(&b, &a, &b)); --t_malloc_fail; ret &= t_compare_mpi(&e, &b); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is both operands */ static int t_mpi_sub_a_from_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x19700101); mpi_set(&e, 0); ret &= t_compare_i(0, mpi_sub_abs(&a, &a, &a)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&e); return (ret); } /* * Target is the first operand, second operand is zero */ static int t_mpi_sub_zero_from_a(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x20140901); mpi_set(&e, 0x20140901); ret &= t_compare_i(0, mpi_sub_abs(&a, &a, &b)); ret &= t_compare_mpi(&e, &a); mpi_destroy(&a); mpi_destroy(&e); return (ret); } /* * Target is the second operand, first operand is zero */ static int t_mpi_sub_b_from_zero(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; int ret = 1; mpi_set(&b, 0x20140901); mpi_set(&e, 0x20140901); ret &= t_compare_i(0, mpi_sub_abs(&b, &a, &b)); ret &= t_compare_mpi(&e, &b); mpi_destroy(&b); mpi_destroy(&e); return (ret); } /* * Target is negative */ static int t_mpi_sub_neg_target(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED) { cryb_mpi a = CRYB_MPI_ZERO, b = CRYB_MPI_ZERO, e = CRYB_MPI_ZERO; cryb_mpi x = CRYB_MPI_ZERO; int ret = 1; mpi_set(&a, 0x20140901); mpi_set(&b, 0x19700101); mpi_set(&e, 0x20140901 - 0x19700101); mpi_set(&x, -1); ret &= t_compare_i(0, mpi_sub_abs(&x, &a, &b)); ret &= t_compare_mpi(&e, &x); mpi_destroy(&a); mpi_destroy(&b); mpi_destroy(&e); mpi_destroy(&x); return (ret); } /*************************************************************************** * Boilerplate */ static int t_prepare(int argc, char *argv[]) { unsigned int i; (void)argc; (void)argv; t_mpi_prepare(); /* addition */ for (i = 0; i < sizeof t_add_cases / sizeof t_add_cases[0]; ++i) t_add_test(t_mpi_add_tc, &t_add_cases[i], "%s", t_add_cases[i].desc); t_add_test(t_mpi_add, NULL, "x = a + b"); t_add_test(t_mpi_add_fail1, NULL, "x = a + b (failure 1)"); t_add_test(t_mpi_add_fail2, NULL, "x = a + b (failure 2)"); t_add_test(t_mpi_add_b_to_a, NULL, "a = a + b"); t_add_test(t_mpi_add_b_to_a_fail, NULL, "a = a + b (failure)"); t_add_test(t_mpi_add_b_to_a_equal, NULL, "a = a + b (a == b)"); t_add_test(t_mpi_add_a_to_b, NULL, "b = a + b"); t_add_test(t_mpi_add_a_to_b_fail, NULL, "b = a + b (failure)"); t_add_test(t_mpi_add_a_to_b_equal, NULL, "b = a + b (a == b)"); t_add_test(t_mpi_add_a_to_a, NULL, "a = a + a"); t_add_test(t_mpi_add_a_to_a_fail, NULL, "a = a + a (failure)"); t_add_test(t_mpi_add_a_and_a, NULL, "b = a + a"); t_add_test(t_mpi_add_a_and_a_fail, NULL, "b = a + a (failure)"); t_add_test(t_mpi_add_zero_to_a, NULL, "a = a + 0"); t_add_test(t_mpi_add_zero_to_b, NULL, "b = 0 + b"); /* subtraction */ for (i = 0; i < sizeof t_sub_cases / sizeof t_sub_cases[0]; ++i) t_add_test(t_mpi_sub_tc, &t_sub_cases[i], "%s", t_sub_cases[i].desc); t_add_test(t_mpi_sub, NULL, "x = a - b"); t_add_test(t_mpi_sub_fail, NULL, "x = a - b (failure)"); t_add_test(t_mpi_sub_b_from_a, NULL, "a = a - b"); t_add_test(t_mpi_sub_b_from_a_fail, NULL, "a = a - b (failure)"); t_add_test(t_mpi_sub_a_from_b, NULL, "b = a - b"); t_add_test(t_mpi_sub_a_from_b_fail, NULL, "b = a - b (failure)"); t_add_test(t_mpi_sub_a_from_a, NULL, "a = a - a"); t_add_test(t_mpi_sub_b_from_zero, NULL, "b = 0 - b"); t_add_test(t_mpi_sub_zero_from_a, NULL, "a = a - z"); t_add_test(t_mpi_sub_neg_target, NULL, "x = a - b (x initially < 0)"); return (0); } static void t_cleanup(void) { t_mpi_cleanup(); } int main(int argc, char *argv[]) { t_main(t_prepare, t_cleanup, argc, argv); }