diff options
| -rw-r--r-- | src/ec25519.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/ec25519.c b/src/ec25519.c index d673aee..b581057 100644 --- a/src/ec25519.c +++ b/src/ec25519.c @@ -473,6 +473,7 @@ int ecc_25519_load_packed(ecc_25519_work_t *out, const ecc_int256_t *in) { if (!square_root(Y, Y2)) return 0; + /* No squeeze is necessary for subtractions from zero */ sub(Yt, zero, Y); select(out->Y, Y, Yt, (in->p[31] >> 7) ^ (Y[0] & 1)); @@ -506,6 +507,7 @@ void ecc_25519_negate(ecc_25519_work_t *out, const ecc_25519_work_t *in) { out->Z[i] = in->Z[i]; } + /* No squeeze is necessary for subtractions from zero */ sub(out->X, zero, in->X); sub(out->T, zero, in->T); } |