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Test improvements

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This commit is contained in:
Pieter Wuille
2013-04-21 19:07:21 +02:00
parent 79b0ce6c84
commit 404c30a800
4 changed files with 162 additions and 41 deletions
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14
src/impl/num_gmp.h
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@@ -42,10 +42,16 @@ int static secp256k1_num_bits(const secp256k1_num_t *a) {
void static secp256k1_num_get_bin(unsigned char *r, unsigned int rlen, const secp256k1_num_t *a) {
unsigned char tmp[65];
int len = mpn_get_str(tmp, 256, (mp_limb_t*)a->data, a->limbs);
assert(len <= rlen);
memset(r, 0, rlen - len);
memcpy(r + rlen - len, tmp, len);
int len = 0;
if (a->limbs>1 || a->data[0] != 0) {
len = mpn_get_str(tmp, 256, (mp_limb_t*)a->data, a->limbs);
}
int shift = 0;
while (shift < len && tmp[shift] == 0) shift++;
assert(len-shift <= rlen);
memset(r, 0, rlen - len + shift);
if (len > shift)
memcpy(r + rlen - len + shift, tmp + shift, len - shift);
}
void static secp256k1_num_set_bin(secp256k1_num_t *r, const unsigned char *a, unsigned int alen) {

20
src/impl/util.h
View File

@@ -15,28 +15,22 @@ static inline uint32_t secp256k1_rand32(void) {
static void secp256k1_rand256(unsigned char *b32) {
for (int i=0; i<8; i++) {
uint32_t r = secp256k1_rand32();
b32[i*4 + 0] = (r >> 0) & 0xFF;
b32[i*4 + 1] = (r >> 8) & 0xFF;
b32[i*4 + 2] = (r >> 16) & 0xFF;
b32[i*4 + 3] = (r >> 24) & 0xFF;
uint32_t r1 = secp256k1_rand32();
b32[i*4 + 0] = (r1 >> 0) & 0xFF;
b32[i*4 + 1] = (r1 >> 8) & 0xFF;
uint32_t r2 = secp256k1_rand32();
b32[i*4 + 2] = (r2 >> 0) & 0xFF;
b32[i*4 + 3] = (r2 >> 8) & 0xFF;
}
}
static void secp256k1_rand256_test(unsigned char *b32) {
int bits=0;
uint32_t ent;
int entbits = 0;
memset(b32, 0, 32);
while (bits < 256) {
if (entbits < 15) {
ent = secp256k1_rand32();
entbits = 32;
}
uint32_t ent = secp256k1_rand32();
int now = 1 + ((ent % 64)*((ent >> 6) % 32)+16)/31;
uint32_t val = 1 & (ent >> 11);
ent -= 12;
entbits >>= 12;
while (now > 0 && bits < 256) {
b32[bits / 8] |= val << (bits % 8);
now--;