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nfqws: fix slen=0 case

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bol-van 2025-01-28 13:01:47 +03:00
parent e5f20d05f6
commit 86352430d4
1 changed files with 13 additions and 3 deletions
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16
nfq/nfqws.c
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@ -1025,9 +1025,19 @@ static void onetime_tls_mod(struct desync_profile *dp)
}
if (dp->fake_tls_mod & FAKE_TLS_MOD_RND_SNI)
{
if (!TLSFindExt(dp->fake_tls,dp->fake_tls_size,0,&ext,&extlen,false) || !TLSAdvanceToHostInSNI(&ext,&extlen,&slen))
if (!TLSFindExt(dp->fake_tls,dp->fake_tls_size,0,&ext,&extlen,false))
{
DLOG_ERR("profile %d rndsni set but tls fake structure invalid or does not have SNI\n", dp->n);
DLOG_ERR("profile %d rndsni set but tls fake does not have SNI\n", dp->n);
exit_clean(1);
}
if (!TLSAdvanceToHostInSNI(&ext,&extlen,&slen))
{
DLOG_ERR("profile %d rndsni set but tls fake has invalid SNI structure\n", dp->n);
exit_clean(1);
}
if (!slen)
{
DLOG_ERR("profile %d rndsni set but tls fake has zero sized SNI\n", dp->n);
exit_clean(1);
}
uint8_t *sni = dp->fake_tls + (ext - dp->fake_tls);
@ -1048,7 +1058,7 @@ static void onetime_tls_mod(struct desync_profile *dp)
sni[slen-4] = '.';
memcpy(sni+slen-3,tld[random()%(sizeof(tld)/sizeof(*tld))],3);
}
else if (slen>=1)
else
fill_random_az09(sni+1,slen-1);
if (params.debug)