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Check the correct consensus before giving it to the client

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Previously, a directory would check the latest NS consensus for
having the signatures the client wanted, and use that consensus's
valid_until time to set the HTTP lifetime.  With this patch, the
directory looks at NS consensus or the microdesc consensus,
depending on what the client asked for.
This commit is contained in:
Nick Mathewson 2012-06-15 10:50:41 -04:00
parent 32bf258881
commit cc21e56ed4
2 changed files with 11 additions and 2 deletions
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4
changes/check_correct_flav_sigs Normal file
View File

@ -0,0 +1,4 @@
o Minor bugfixes:
- When checking for requested signatures on the latest consensus before
serving it to a client, make sure to check the right consensus flavor.
Bugfix on 0.2.2.6-alpha.

9
src/or/directory.c
View File

@ -2775,10 +2775,11 @@ directory_handle_command_get(dir_connection_t *conn, const char *headers,
else
request_type = "/tor/status/?";
} else {
networkstatus_t *v = networkstatus_get_latest_consensus();
networkstatus_t *v;
time_t now = time(NULL);
const char *want_fps = NULL;
char *flavor = NULL;
int flav = FLAV_NS;
#define CONSENSUS_URL_PREFIX "/tor/status-vote/current/consensus/"
#define CONSENSUS_FLAVORED_PREFIX "/tor/status-vote/current/consensus-"
/* figure out the flavor if any, and who we wanted to sign the thing */
@ -2792,12 +2793,16 @@ directory_handle_command_get(dir_connection_t *conn, const char *headers,
} else {
flavor = tor_strdup(f);
}
flav = networkstatus_parse_flavor_name(flavor);
if (flav < 0)
flav = FLAV_NS;
} else {
if (!strcmpstart(url, CONSENSUS_URL_PREFIX))
want_fps = url+strlen(CONSENSUS_URL_PREFIX);
}
/* XXXX023 MICRODESC NM NM should check document of correct flavor */
v = networkstatus_get_latest_consensus_by_flavor(flav);
if (v && want_fps &&
!client_likes_consensus(v, want_fps)) {
write_http_status_line(conn, 404, "Consensus not signed by sufficient "