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OpenSSL: Handle EC_POINT_is_on_curve() error case

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Even though this OpenSSL function is documented as returning "1 if point
if on the curve and 0 otherwise", it can apparently return -1 on some
error cases. Be prepared for that and check explicitly against 1 instead
of non-zero.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2015-06-26 15:29:29 +03:00
parent bbb50086e3
commit f826fb1de1
1 changed files with 2 additions and 1 deletions
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3
src/crypto/crypto_openssl.c
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@ -1412,7 +1412,8 @@ int crypto_ec_point_is_at_infinity(struct crypto_ec *e,
int crypto_ec_point_is_on_curve(struct crypto_ec *e, int crypto_ec_point_is_on_curve(struct crypto_ec *e,
const struct crypto_ec_point *p) const struct crypto_ec_point *p)
{ {
return EC_POINT_is_on_curve(e->group, (const EC_POINT *) p, e->bnctx); return EC_POINT_is_on_curve(e->group, (const EC_POINT *) p,
e->bnctx) == 1;
} }