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check dss g range

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--HG--
branch : fuzz
This commit is contained in:
Matt Johnston 2017-08-14 00:00:10 +08:00
parent 4b7105dfea
commit 5cd003d9e6
1 changed files with 12 additions and 0 deletions
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12
dss.c
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@ -73,6 +73,18 @@ int buf_get_dss_pub_key(buffer* buf, dropbear_dss_key *key) {
goto out;
}
/* test 1 < g < p */
if (mp_cmp_d(key->g, 1) != MP_GT) {
dropbear_log(LOG_WARNING, "Bad DSS g");
ret = DROPBEAR_FAILURE;
goto out;
}
if (mp_cmp(key->g, key->p) != MP_LT) {
dropbear_log(LOG_WARNING, "Bad DSS g");
ret = DROPBEAR_FAILURE;
goto out;
}
ret = DROPBEAR_SUCCESS;
TRACE(("leave buf_get_dss_pub_key: success"))
out: