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test dss key parameter lengths exactly

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This commit is contained in:
Matt Johnston 2017-06-24 10:32:33 +08:00
parent 5896a4941d
commit 57690891ce
1 changed files with 2 additions and 4 deletions
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6
dss.c
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@ -61,16 +61,14 @@ int buf_get_dss_pub_key(buffer* buf, dropbear_dss_key *key) {
goto out; goto out;
} }
if (mp_count_bits(key->p) < DSS_P_BITS) { if (mp_count_bits(key->p) != DSS_P_BITS) {
dropbear_log(LOG_WARNING, "Bad DSS p"); dropbear_log(LOG_WARNING, "Bad DSS p");
TRACE(("leave buf_get_dss_pub_key: short key"))
ret = DROPBEAR_FAILURE; ret = DROPBEAR_FAILURE;
goto out; goto out;
} }
if (mp_count_bits(key->q) < DSS_Q_BITS) { if (mp_count_bits(key->q) != DSS_Q_BITS) {
dropbear_log(LOG_WARNING, "Bad DSS q"); dropbear_log(LOG_WARNING, "Bad DSS q");
TRACE(("leave buf_get_dss_pub_key: short key"))
ret = DROPBEAR_FAILURE; ret = DROPBEAR_FAILURE;
goto out; goto out;
} }