frost/secp256k1-zkp
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Covert several more files to C89.

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This commit is contained in:
Gregory Maxwell
2015-01-24 23:34:09 +00:00
parent 45cdf4479d
commit 792bcdb015
5 changed files with 68 additions and 52 deletions
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29
src/num_gmp_impl.h
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@@ -29,10 +29,10 @@ static void secp256k1_num_copy(secp256k1_num_t *r, const secp256k1_num_t *a) {
static void secp256k1_num_get_bin(unsigned char *r, unsigned int rlen, const secp256k1_num_t *a) {
unsigned char tmp[65];
int len = 0;
int shift = 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++;
VERIFY_CHECK(len-shift <= (int)rlen);
memset(r, 0, rlen - len + shift);
@@ -43,9 +43,10 @@ static void secp256k1_num_get_bin(unsigned char *r, unsigned int rlen, const sec
}
static void secp256k1_num_set_bin(secp256k1_num_t *r, const unsigned char *a, unsigned int alen) {
int len;
VERIFY_CHECK(alen > 0);
VERIFY_CHECK(alen <= 64);
int len = mpn_set_str(r->data, a, alen, 256);
len = mpn_set_str(r->data, a, alen, 256);
if (len == 0) {
r->data[0] = 0;
len = 1;
@@ -91,6 +92,12 @@ static void secp256k1_num_mod(secp256k1_num_t *r, const secp256k1_num_t *m) {
}
static void secp256k1_num_mod_inverse(secp256k1_num_t *r, const secp256k1_num_t *a, const secp256k1_num_t *m) {
int i;
mp_limb_t g[NUM_LIMBS+1];
mp_limb_t u[NUM_LIMBS+1];
mp_limb_t v[NUM_LIMBS+1];
mp_size_t sn;
mp_size_t gn;
secp256k1_num_sanity(a);
secp256k1_num_sanity(m);
@@ -106,15 +113,12 @@ static void secp256k1_num_mod_inverse(secp256k1_num_t *r, const secp256k1_num_t
*/
VERIFY_CHECK(m->limbs <= NUM_LIMBS);
VERIFY_CHECK(m->data[m->limbs-1] != 0);
mp_limb_t g[NUM_LIMBS+1];
mp_limb_t u[NUM_LIMBS+1];
mp_limb_t v[NUM_LIMBS+1];
for (int i=0; i < m->limbs; i++) {
for (i = 0; i < m->limbs; i++) {
u[i] = (i < a->limbs) ? a->data[i] : 0;
v[i] = m->data[i];
}
mp_size_t sn = NUM_LIMBS+1;
mp_size_t gn = mpn_gcdext(g, r->data, &sn, u, m->limbs, v, m->limbs);
sn = NUM_LIMBS+1;
gn = mpn_gcdext(g, r->data, &sn, u, m->limbs, v, m->limbs);
VERIFY_CHECK(gn == 1);
VERIFY_CHECK(g[0] == 1);
r->neg = a->neg ^ m->neg;
@@ -183,10 +187,10 @@ static void secp256k1_num_sub(secp256k1_num_t *r, const secp256k1_num_t *a, cons
}
static void secp256k1_num_mul(secp256k1_num_t *r, const secp256k1_num_t *a, const secp256k1_num_t *b) {
mp_limb_t tmp[2*NUM_LIMBS+1];
secp256k1_num_sanity(a);
secp256k1_num_sanity(b);
mp_limb_t tmp[2*NUM_LIMBS+1];
VERIFY_CHECK(a->limbs + b->limbs <= 2*NUM_LIMBS+1);
if ((a->limbs==1 && a->data[0]==0) || (b->limbs==1 && b->data[0]==0)) {
r->limbs = 1;
@@ -207,13 +211,14 @@ static void secp256k1_num_mul(secp256k1_num_t *r, const secp256k1_num_t *a, cons
}
static void secp256k1_num_shift(secp256k1_num_t *r, int bits) {
int i;
if (bits % GMP_NUMB_BITS) {
// Shift within limbs.
/* Shift within limbs. */
mpn_rshift(r->data, r->data, r->limbs, bits % GMP_NUMB_BITS);
}
if (bits >= GMP_NUMB_BITS) {
// Shift full limbs.
for (int i = 0; i < r->limbs; i++) {
/* Shift full limbs. */
for (i = 0; i < r->limbs; i++) {
int index = i + (bits / GMP_NUMB_BITS);
if (index < r->limbs && index < 2*NUM_LIMBS) {
r->data[i] = r->data[index];