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SP C ECC: mont sub - always normalize after sub before check for add

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This commit is contained in:
Sean Parkinson
2021-05-27 11:08:05 +10:00
parent 1fe445368c
commit 4e88521a90
2 changed files with 5 additions and 0 deletions
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2
wolfcrypt/src/sp_c32.c
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@@ -13693,6 +13693,7 @@ static void sp_256_mont_sub_10(sp_digit* r, const sp_digit* a, const sp_digit* b
const sp_digit* m) const sp_digit* m)
{ {
(void)sp_256_sub_10(r, a, b); (void)sp_256_sub_10(r, a, b);
sp_256_norm_10(r);
sp_256_cond_add_10(r, r, m, r[9] >> 22); sp_256_cond_add_10(r, r, m, r[9] >> 22);
sp_256_norm_10(r); sp_256_norm_10(r);
} }
@@ -20803,6 +20804,7 @@ static void sp_384_mont_sub_15(sp_digit* r, const sp_digit* a, const sp_digit* b
const sp_digit* m) const sp_digit* m)
{ {
(void)sp_384_sub_15(r, a, b); (void)sp_384_sub_15(r, a, b);
sp_384_norm_15(r);
sp_384_cond_add_15(r, r, m, r[14] >> 20); sp_384_cond_add_15(r, r, m, r[14] >> 20);
sp_384_norm_15(r); sp_384_norm_15(r);
} }

3
wolfcrypt/src/sp_c64.c
View File

@@ -13576,6 +13576,7 @@ static void sp_256_mont_sub_5(sp_digit* r, const sp_digit* a, const sp_digit* b,
const sp_digit* m) const sp_digit* m)
{ {
(void)sp_256_sub_5(r, a, b); (void)sp_256_sub_5(r, a, b);
sp_256_norm_5(r);
sp_256_cond_add_5(r, r, m, r[4] >> 48); sp_256_cond_add_5(r, r, m, r[4] >> 48);
sp_256_norm_5(r); sp_256_norm_5(r);
} }
@@ -20205,6 +20206,7 @@ static void sp_384_mont_sub_7(sp_digit* r, const sp_digit* a, const sp_digit* b,
const sp_digit* m) const sp_digit* m)
{ {
(void)sp_384_sub_7(r, a, b); (void)sp_384_sub_7(r, a, b);
sp_384_norm_7(r);
sp_384_cond_add_7(r, r, m, r[6] >> 54); sp_384_cond_add_7(r, r, m, r[6] >> 54);
sp_384_norm_7(r); sp_384_norm_7(r);
} }
@@ -27890,6 +27892,7 @@ static void sp_1024_mont_sub_18(sp_digit* r, const sp_digit* a, const sp_digit*
const sp_digit* m) const sp_digit* m)
{ {
(void)sp_1024_sub_18(r, a, b); (void)sp_1024_sub_18(r, a, b);
sp_1024_norm_18(r);
sp_1024_cond_add_18(r, r, m, r[17] >> 55); sp_1024_cond_add_18(r, r, m, r[17] >> 55);
sp_1024_norm_18(r); sp_1024_norm_18(r);
} }