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scalar: use secp256k1_{read,write}_be32 helpers (8x32 impl.)

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This commit is contained in:
Sebastian Falbesoner 2023-06-04 02:50:21 +02:00
parent 60556c9f49
commit 52b84238de
1 changed files with 16 additions and 16 deletions
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32
src/scalar_8x32_impl.h
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@ -169,14 +169,14 @@ static void secp256k1_scalar_cadd_bit(secp256k1_scalar *r, unsigned int bit, int
static void secp256k1_scalar_set_b32(secp256k1_scalar *r, const unsigned char *b32, int *overflow) {
int over;
r->d[0] = (uint32_t)b32[31] | (uint32_t)b32[30] << 8 | (uint32_t)b32[29] << 16 | (uint32_t)b32[28] << 24;
r->d[1] = (uint32_t)b32[27] | (uint32_t)b32[26] << 8 | (uint32_t)b32[25] << 16 | (uint32_t)b32[24] << 24;
r->d[2] = (uint32_t)b32[23] | (uint32_t)b32[22] << 8 | (uint32_t)b32[21] << 16 | (uint32_t)b32[20] << 24;
r->d[3] = (uint32_t)b32[19] | (uint32_t)b32[18] << 8 | (uint32_t)b32[17] << 16 | (uint32_t)b32[16] << 24;
r->d[4] = (uint32_t)b32[15] | (uint32_t)b32[14] << 8 | (uint32_t)b32[13] << 16 | (uint32_t)b32[12] << 24;
r->d[5] = (uint32_t)b32[11] | (uint32_t)b32[10] << 8 | (uint32_t)b32[9] << 16 | (uint32_t)b32[8] << 24;
r->d[6] = (uint32_t)b32[7] | (uint32_t)b32[6] << 8 | (uint32_t)b32[5] << 16 | (uint32_t)b32[4] << 24;
r->d[7] = (uint32_t)b32[3] | (uint32_t)b32[2] << 8 | (uint32_t)b32[1] << 16 | (uint32_t)b32[0] << 24;
r->d[0] = secp256k1_read_be32(&b32[28]);
r->d[1] = secp256k1_read_be32(&b32[24]);
r->d[2] = secp256k1_read_be32(&b32[20]);
r->d[3] = secp256k1_read_be32(&b32[16]);
r->d[4] = secp256k1_read_be32(&b32[12]);
r->d[5] = secp256k1_read_be32(&b32[8]);
r->d[6] = secp256k1_read_be32(&b32[4]);
r->d[7] = secp256k1_read_be32(&b32[0]);
over = secp256k1_scalar_reduce(r, secp256k1_scalar_check_overflow(r));
if (overflow) {
*overflow = over;
@ -184,14 +184,14 @@ static void secp256k1_scalar_set_b32(secp256k1_scalar *r, const unsigned char *b
}
static void secp256k1_scalar_get_b32(unsigned char *bin, const secp256k1_scalar* a) {
bin[0] = a->d[7] >> 24; bin[1] = a->d[7] >> 16; bin[2] = a->d[7] >> 8; bin[3] = a->d[7];
bin[4] = a->d[6] >> 24; bin[5] = a->d[6] >> 16; bin[6] = a->d[6] >> 8; bin[7] = a->d[6];
bin[8] = a->d[5] >> 24; bin[9] = a->d[5] >> 16; bin[10] = a->d[5] >> 8; bin[11] = a->d[5];
bin[12] = a->d[4] >> 24; bin[13] = a->d[4] >> 16; bin[14] = a->d[4] >> 8; bin[15] = a->d[4];
bin[16] = a->d[3] >> 24; bin[17] = a->d[3] >> 16; bin[18] = a->d[3] >> 8; bin[19] = a->d[3];
bin[20] = a->d[2] >> 24; bin[21] = a->d[2] >> 16; bin[22] = a->d[2] >> 8; bin[23] = a->d[2];
bin[24] = a->d[1] >> 24; bin[25] = a->d[1] >> 16; bin[26] = a->d[1] >> 8; bin[27] = a->d[1];
bin[28] = a->d[0] >> 24; bin[29] = a->d[0] >> 16; bin[30] = a->d[0] >> 8; bin[31] = a->d[0];
secp256k1_write_be32(&bin[0], a->d[7]);
secp256k1_write_be32(&bin[4], a->d[6]);
secp256k1_write_be32(&bin[8], a->d[5]);
secp256k1_write_be32(&bin[12], a->d[4]);
secp256k1_write_be32(&bin[16], a->d[3]);
secp256k1_write_be32(&bin[20], a->d[2]);
secp256k1_write_be32(&bin[24], a->d[1]);
secp256k1_write_be32(&bin[28], a->d[0]);
}
SECP256K1_INLINE static int secp256k1_scalar_is_zero(const secp256k1_scalar *a) {