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cryb-to/t/t_mpi_add_sub.c
Dag-Erling Smørgrav d014682206 Add t_is_zero predicates.
2022-09-16 11:09:55 +02:00

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/*
* 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 <stdint.h>
#include <string.h>
#include <unistd.h>
#include <cryb/endian.h>
#include <cryb/mpi.h>
#include <cryb/test.h>
#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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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_is_zero_i(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);
}
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