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Avoid uninitialized access in secp256k1_gej_double

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This commit is contained in:
Pieter Wuille
2014-10-26 06:50:21 -07:00
parent bff11e9112
commit 03bfc07b9e
1 changed files with 6 additions and 1 deletions
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7
src/group_impl.h
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@ -190,9 +190,14 @@ int static secp256k1_ge_is_valid(const secp256k1_ge_t *a) {
} }
void static secp256k1_gej_double(secp256k1_gej_t *r, const secp256k1_gej_t *a) { void static secp256k1_gej_double(secp256k1_gej_t *r, const secp256k1_gej_t *a) {
if (a->infinity) {
r->infinity = 1;
return;
}
secp256k1_fe_t t5 = a->y; secp256k1_fe_t t5 = a->y;
secp256k1_fe_normalize(&t5); secp256k1_fe_normalize(&t5);
if (a->infinity || secp256k1_fe_is_zero(&t5)) { if (secp256k1_fe_is_zero(&t5)) {
r->infinity = 1; r->infinity = 1;
return; return;
} }