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author | Niels Möller <nisse@lysator.liu.se> | 2021-03-13 17:26:37 +0100 |
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committer | Niels Möller <nisse@lysator.liu.se> | 2021-03-17 10:20:27 +0100 |
commit | 971bed6ab4b27014eb23085e8176917e1a096fd5 (patch) | |
tree | 76b05df5e9fe02a6d8f3307e98f5ecd1c2088666 | |
parent | a63893791280d441c713293491da97c79c0950fe (diff) | |
download | nettle-971bed6ab4b27014eb23085e8176917e1a096fd5.tar.gz |
Use ecc_mod_mul_canonical for point comparison.
* eddsa-verify.c (equal_h): Use ecc_mod_mul_canonical.
(cherry picked from commit 5b7608fde3a6d2ab82bffb35db1e4e330927c906)
-rw-r--r-- | ChangeLog | 4 | ||||
-rw-r--r-- | eddsa-verify.c | 9 |
2 files changed, 6 insertions, 7 deletions
@@ -1,3 +1,7 @@ +2021-03-13 Niels Möller <nisse@lysator.liu.se> + + * eddsa-verify.c (equal_h): Use ecc_mod_mul_canonical. + 2021-03-11 Niels Möller <nisse@lysator.liu.se> * ecc-mod-arith.c (ecc_mod_mul_canonical, ecc_mod_sqr_canonical): diff --git a/eddsa-verify.c b/eddsa-verify.c index de68f240..10d075ee 100644 --- a/eddsa-verify.c +++ b/eddsa-verify.c @@ -53,13 +53,8 @@ equal_h (const struct ecc_modulo *p, #define t0 scratch #define t1 (scratch + p->size) - ecc_mod_mul (p, t0, x1, z2, t0); - if (mpn_cmp (t0, p->m, p->size) >= 0) - mpn_sub_n (t0, t0, p->m, p->size); - - ecc_mod_mul (p, t1, x2, z1, t1); - if (mpn_cmp (t1, p->m, p->size) >= 0) - mpn_sub_n (t1, t1, p->m, p->size); + ecc_mod_mul_canonical (p, t0, x1, z2, t0); + ecc_mod_mul_canonical (p, t1, x2, z1, t1); return mpn_cmp (t0, t1, p->size) == 0; |