diff options
| -rw-r--r-- | networking/tls_sp_c32.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/networking/tls_sp_c32.c b/networking/tls_sp_c32.c index c5e887a..2b1ae14 100644 --- a/networking/tls_sp_c32.c +++ b/networking/tls_sp_c32.c @@ -557,24 +557,24 @@ static void sp_256_mod_mul_norm_10(sp_digit* r, const sp_digit* a) t[3] -= o; t[6] -= o; t[7] += o; - t[1] += t[0] >> 32; t[0] &= 0xffffffff; - t[2] += t[1] >> 32; t[1] &= 0xffffffff; - t[3] += t[2] >> 32; t[2] &= 0xffffffff; - t[4] += t[3] >> 32; t[3] &= 0xffffffff; - t[5] += t[4] >> 32; t[4] &= 0xffffffff; - t[6] += t[5] >> 32; t[5] &= 0xffffffff; - t[7] += t[6] >> 32; t[6] &= 0xffffffff; - - r[0] = 0x3ffffff & ((sp_digit)(t[0])); - r[1] = 0x3ffffff & ((sp_digit)(t[0] >> 26) | ((sp_digit)t[1] << 6)); - r[2] = 0x3ffffff & ((sp_digit)(t[1] >> 20) | ((sp_digit)t[2] << 12)); - r[3] = 0x3ffffff & ((sp_digit)(t[2] >> 14) | ((sp_digit)t[3] << 18)); - r[4] = 0x3ffffff & ((sp_digit)(t[3] >> 8) | ((sp_digit)t[4] << 24)); - r[5] = 0x3ffffff & ((sp_digit)t[4] >> 2); /* small shift, ok to cast t[4] to narrower type */ - r[6] = 0x3ffffff & ((sp_digit)(t[4] >> 28) | ((sp_digit)t[5] << 4)); - r[7] = 0x3ffffff & ((sp_digit)(t[5] >> 22) | ((sp_digit)t[6] << 10)); - r[8] = 0x3ffffff & ((sp_digit)(t[6] >> 16) | ((sp_digit)t[7] << 16)); - r[9] = ((sp_digit)(t[7] >> 10)); + t[1] += t[0] >> 32; //t[0] &= 0xffffffff; + t[2] += t[1] >> 32; //t[1] &= 0xffffffff; + t[3] += t[2] >> 32; //t[2] &= 0xffffffff; + t[4] += t[3] >> 32; //t[3] &= 0xffffffff; + t[5] += t[4] >> 32; //t[4] &= 0xffffffff; + t[6] += t[5] >> 32; //t[5] &= 0xffffffff; + t[7] += t[6] >> 32; //t[6] &= 0xffffffff; - (uint32_t)t[i] casts below accomplish masking + + r[0] = 0x3ffffff & ((sp_digit)((uint32_t)t[0])); + r[1] = 0x3ffffff & ((sp_digit)((uint32_t)t[0] >> 26) | ((sp_digit)t[1] << 6)); + r[2] = 0x3ffffff & ((sp_digit)((uint32_t)t[1] >> 20) | ((sp_digit)t[2] << 12)); + r[3] = 0x3ffffff & ((sp_digit)((uint32_t)t[2] >> 14) | ((sp_digit)t[3] << 18)); + r[4] = 0x3ffffff & ((sp_digit)((uint32_t)t[3] >> 8) | ((sp_digit)t[4] << 24)); + r[5] = 0x3ffffff & ((sp_digit)((uint32_t)t[4] >> 2)); + r[6] = 0x3ffffff & ((sp_digit)((uint32_t)t[4] >> 28) | ((sp_digit)t[5] << 4)); + r[7] = 0x3ffffff & ((sp_digit)((uint32_t)t[5] >> 22) | ((sp_digit)t[6] << 10)); + r[8] = 0x3ffffff & ((sp_digit)((uint32_t)t[6] >> 16) | ((sp_digit)t[7] << 16)); + r[9] = ((sp_digit)((uint32_t)t[7] >> 10)); } /* Map the Montgomery form projective co-ordinate point to an affine point. |