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use pseudo-random data for mtest

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This commit is contained in:
Steffen Jaeckel 2017-09-13 17:55:22 +02:00
parent d3cca2245f
commit f98098f78f
1 changed files with 49 additions and 15 deletions
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64
mtest/mtest.c
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@ -41,34 +41,62 @@ mulmod
#undef DIGIT_BIT
#include "../src/headers/tfm.h"
#ifdef TFM_MTEST_REAL_RAND
#define getRandChar() fgetc(rng)
FILE *rng;
#else
#define getRandChar() (rand()&0xFF)
#endif
/* 1-2048 bit numbers */
void rand_num(mp_int *a)
{
int size;
unsigned char buf[(FP_MAX_SIZE/16 - DIGIT_BIT/2) + 1];
unsigned char buf[2048];
size_t sz;
size = 1 + ((fgetc(rng)<<8) + fgetc(rng)) % (FP_MAX_SIZE/16 - DIGIT_BIT/2);
buf[0] = (fgetc(rng)&1)?1:0;
fread(buf+1, 1, size, rng);
while (buf[1] == 0) buf[1] = fgetc(rng);
size = 1 + ((getRandChar()<<8) + getRandChar()) % 101;
buf[0] = (getRandChar()&1)?1:0;
#ifdef TFM_MTEST_REAL_RAND
sz = fread(buf+1, 1, size, rng);
#else
sz = 1;
while (sz < (unsigned)size) {
buf[sz] = getRandChar();
++sz;
}
#endif
if (sz != (unsigned)size) {
fprintf(stderr, "\nWarning: fread failed\n\n");
}
while (buf[1] == 0) buf[1] = getRandChar();
mp_read_raw(a, buf, 1+size);
}
/* 1-256 bit numbers (to test things like exptmod) */
void rand_num2(mp_int *a)
{
int size;
unsigned char buf[(FP_MAX_SIZE/16 - DIGIT_BIT/2) + 1];
unsigned char buf[2048];
size_t sz;
size = 1 + ((fgetc(rng)<<8) + fgetc(rng)) % (FP_MAX_SIZE/16 - DIGIT_BIT/2);
buf[0] = (fgetc(rng)&1)?1:0;
fread(buf+1, 1, size, rng);
while (buf[1] == 0) buf[1] = fgetc(rng);
size = 10 + ((getRandChar()<<8) + getRandChar()) % 101;
buf[0] = (getRandChar()&1)?1:0;
#ifdef TFM_MTEST_REAL_RAND
sz = fread(buf+1, 1, size, rng);
#else
sz = 1;
while (sz < (unsigned)size) {
buf[sz] = getRandChar();
++sz;
}
#endif
if (sz != (unsigned)size) {
fprintf(stderr, "\nWarning: fread failed\n\n");
}
while (buf[1] == 0) buf[1] = getRandChar();
mp_read_raw(a, buf, 1+size);
}
#define mp_to64(a, b) mp_toradix_n(a, b, 64, sizeof(b))
int main(int argc, char *argv[])
@ -126,6 +154,7 @@ int main(int argc, char *argv[])
}
*/
#ifdef TFM_MTEST_REAL_RAND
rng = fopen("/dev/urandom", "rb");
if (rng == NULL) {
rng = fopen("/dev/random", "rb");
@ -134,6 +163,9 @@ int main(int argc, char *argv[])
rng = stdin;
}
}
#else
srand(23);
#endif
#ifdef MTEST_NO_FULLSPEED
t1 = clock();
@ -145,7 +177,7 @@ int main(int argc, char *argv[])
t1 = clock();
}
#endif
n = fgetc(rng) % 16;
n = getRandChar() % 16;
if (max != 0) {
--max;
if (max == 0)
@ -214,7 +246,7 @@ int main(int argc, char *argv[])
/* mul_2d test */
rand_num(&a);
mp_copy(&a, &b);
n = fgetc(rng) & 63;
n = getRandChar() & 63;
mp_mul_2d(&b, n, &b);
mp_to64(&a, buf);
printf("mul2d\n");
@ -226,7 +258,7 @@ int main(int argc, char *argv[])
/* div_2d test */
rand_num(&a);
mp_copy(&a, &b);
n = fgetc(rng) & 63;
n = getRandChar() & 63;
mp_div_2d(&b, n, &b, NULL);
mp_to64(&a, buf);
printf("div2d\n");
@ -349,7 +381,9 @@ int main(int argc, char *argv[])
break;
}
}
#ifdef TFM_MTEST_REAL_RAND
fclose(rng);
#endif
return 0;
}