WolfSSL
/
wolfssl
mirror of https://github.com/wolfSSL/wolfssl.git
1
0
Fork 0
Code Issues Releases Wiki Activity

Merge pull request #3730 from guidovranken/zd11650 

SP math: Better error propagation
pull/3738/head
Sean Parkinson 2021-02-08 14:17:43 +10:00 committed by GitHub
parent 2933db8915 358dbd5090
commit 36d124ed2f
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 15 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
wolfcrypt/src/sp_int.c
View File

@ -7854,8 +7854,10 @@ int sp_invmod(sp_int* a, sp_int* m, sp_int* r)
}
if (err == MP_OKAY) {
_sp_sub_d(r, 1, r);
sp_div(r, a, r, NULL);
sp_sub(m, r, r);
err = sp_div(r, a, r, NULL);
if (err == MP_OKAY) {
sp_sub(m, r, r);
}
}
}
else {
@ -8591,7 +8593,10 @@ static int _sp_exptmod_base_2(sp_int* e, int digits, sp_int* m, sp_int* r)
/* Square for number of bits in window. */
for (j = 0; (j < EXP2_WINSIZE) && (err == MP_OKAY); j++) {
err = sp_sqr(tr, tr);
if ((err == MP_OKAY) && (m->used > 1)) {
if (err != MP_OKAY) {
break;
}
if (m->used > 1) {
err = _sp_mont_red(tr, m, mp);
}
else {
@ -8610,6 +8615,9 @@ static int _sp_exptmod_base_2(sp_int* e, int digits, sp_int* m, sp_int* r)
if (err == MP_OKAY) {
err = sp_mod(tr, m, tr);
}
if (err != MP_OKAY) {
break;
}
}
}
@ -13671,7 +13679,10 @@ int sp_gcd(sp_int* a, sp_int* b, sp_int* r)
}
}
else {
sp_mod(u, v, t);
err = sp_mod(u, v, t);
}
if (err != MP_OKAY) {
break;
}
sp_copy(v, u);
sp_copy(t, v);