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DPP: Verify that PKEX Qi is not the point-at-infinity

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This was added as an explicit requirement in DPP tech spec v0.2.3.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2017-10-10 00:42:34 +03:00 committed by Jouni Malinen
parent b9c0e1fa5c
commit 6573171792
1 changed files with 4 additions and 0 deletions
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4
src/common/dpp.c
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@ -4851,6 +4851,10 @@ static EC_POINT * dpp_pkex_derive_Qi(const struct dpp_curve_params *curve,
if (!hash_bn ||
EC_POINT_mul(group2, Qi, NULL, Pi_point, hash_bn, bnctx) != 1)
goto fail;
if (EC_POINT_is_at_infinity(group, Qi)) {
wpa_printf(MSG_INFO, "PDP: Qi is the point-at-infinity");
goto fail;
}
out:
EC_KEY_free(Pi_ec);
EVP_PKEY_free(Pi);