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Improve log messages for problems about ed25519 keypinning

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Fixes 16286; bugfix on 0.2.7.2-alpha.
This commit is contained in:
Nick Mathewson 2015-07-31 10:47:39 -04:00
parent 8c83e8cec0
commit 20254907d7
4 changed files with 30 additions and 20 deletions
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8
changes/bug16286 Normal file
View File

@ -0,0 +1,8 @@
o Minor bugfixes (authority):
- Downgrade log messages about Ed25519 key issues, if they are in
old cached router descriptors. Fixes part of bug 16286; bugfix on
0.2.7.2-alpha.
- When we find an Ed25519 key issue in a cached descriptor, stop saying
the descriptor was just "uploaded". Fixes another part of bug 16286;
bugfix on 0.2.7.2-alpha.

37
src/or/dirserv.c
View File

@ -244,7 +244,8 @@ dirserv_load_fingerprint_file(void)
* If the status is 'FP_REJECT' and <b>msg</b> is provided, set
* *<b>msg</b> to an explanation of why. */
uint32_t
dirserv_router_get_status(const routerinfo_t *router, const char **msg)
dirserv_router_get_status(const routerinfo_t *router, const char **msg,
int severity)
{
char d[DIGEST_LEN];
@ -263,7 +264,8 @@ dirserv_router_get_status(const routerinfo_t *router, const char **msg)
if (msg) {
*msg = "Ed25519 identity key or RSA identity key has changed.";
}
log_warn(LD_DIR, "Router %s uploaded a descriptor with a Ed25519 key "
log_fn(severity, LD_DIR,
"Descriptor from router %s has an Ed25519 key, "
"but the <rsa,ed25519> keys don't match what they were before.",
router_describe(router));
return FP_REJECT;
@ -272,7 +274,8 @@ dirserv_router_get_status(const routerinfo_t *router, const char **msg)
/* No ed25519 key */
if (KEYPIN_MISMATCH == keypin_check_lone_rsa(
(const uint8_t*)router->cache_info.identity_digest)) {
log_warn(LD_DIR, "Router %s uploaded a descriptor with no Ed25519 key, "
log_fn(severity, LD_DIR,
"Descriptor from router %s has no Ed25519 key, "
"when we previously knew an Ed25519 for it. Ignoring for now, "
"since Tor 0.2.6 is under development.",
router_describe(router));
@ -299,7 +302,7 @@ dirserv_would_reject_router(const routerstatus_t *rs)
res = dirserv_get_status_impl(rs->identity_digest, rs->nickname,
rs->addr, rs->or_port,
NULL, NULL, 0);
NULL, NULL, LOG_DEBUG);
return (res & FP_REJECT) != 0;
}
@ -308,13 +311,13 @@ dirserv_would_reject_router(const routerstatus_t *rs)
* (hex, no spaces), nickname, address (used for logging only), IP address, OR
* port and platform (logging only) as arguments.
*
* If should_log is false, do not log messages. (There's not much point in
* Log messages at 'severity'. (There's not much point in
* logging that we're rejecting servers we'll not download.)
*/
static uint32_t
dirserv_get_status_impl(const char *id_digest, const char *nickname,
uint32_t addr, uint16_t or_port,
const char *platform, const char **msg, int should_log)
const char *platform, const char **msg, int severity)
{
uint32_t result = 0;
router_status_t *status_by_digest;
@ -322,10 +325,9 @@ dirserv_get_status_impl(const char *id_digest, const char *nickname,
if (!fingerprint_list)
fingerprint_list = authdir_config_new();
if (should_log)
log_debug(LD_DIRSERV, "%d fingerprints, %d digests known.",
strmap_size(fingerprint_list->fp_by_name),
digestmap_size(fingerprint_list->status_by_digest));
log_debug(LD_DIRSERV, "%d fingerprints, %d digests known.",
strmap_size(fingerprint_list->fp_by_name),
digestmap_size(fingerprint_list->status_by_digest));
/* Versions before Tor 0.2.4.18-rc are too old to support, and are
* missing some important security fixes too. Disable them. */
@ -350,23 +352,22 @@ dirserv_get_status_impl(const char *id_digest, const char *nickname,
}
if (authdir_policy_badexit_address(addr, or_port)) {
if (should_log)
log_info(LD_DIRSERV, "Marking '%s' as bad exit because of address '%s'",
log_fn(severity, LD_DIRSERV,
"Marking '%s' as bad exit because of address '%s'",
nickname, fmt_addr32(addr));
result |= FP_BADEXIT;
}
if (!authdir_policy_permits_address(addr, or_port)) {
if (should_log)
log_info(LD_DIRSERV, "Rejecting '%s' because of address '%s'",
log_fn(severity, LD_DIRSERV, "Rejecting '%s' because of address '%s'",
nickname, fmt_addr32(addr));
if (msg)
*msg = "Authdir is rejecting routers in this range.";
return FP_REJECT;
}
if (!authdir_policy_valid_address(addr, or_port)) {
if (should_log)
log_info(LD_DIRSERV, "Not marking '%s' valid because of address '%s'",
log_fn(severity, LD_DIRSERV,
"Not marking '%s' valid because of address '%s'",
nickname, fmt_addr32(addr));
result |= FP_INVALID;
}
@ -422,9 +423,9 @@ authdir_wants_to_reject_router(routerinfo_t *ri, const char **msg,
int complain, int *valid_out)
{
/* Okay. Now check whether the fingerprint is recognized. */
uint32_t status = dirserv_router_get_status(ri, msg);
time_t now;
int severity = (complain && ri->contact_info) ? LOG_NOTICE : LOG_INFO;
uint32_t status = dirserv_router_get_status(ri, msg, severity);
tor_assert(msg);
if (status & FP_REJECT)
return -1; /* msg is already set. */
@ -734,7 +735,7 @@ directory_remove_invalid(void)
uint32_t r;
if (!ent)
continue;
r = dirserv_router_get_status(ent, &msg);
r = dirserv_router_get_status(ent, &msg, LOG_INFO);
router_get_description(description, ent);
if (r & FP_REJECT) {
log_info(LD_DIRSERV, "Router %s is now rejected: %s",

3
src/or/dirserv.h
View File

@ -84,7 +84,8 @@ int authdir_wants_to_reject_router(routerinfo_t *ri, const char **msg,
int complain,
int *valid_out);
uint32_t dirserv_router_get_status(const routerinfo_t *router,
const char **msg);
const char **msg,
int severity);
void dirserv_set_node_flags_from_authoritative_status(node_t *node,
uint32_t authstatus);

2
src/or/nodelist.c
View File

@ -176,7 +176,7 @@ nodelist_set_routerinfo(routerinfo_t *ri, routerinfo_t **ri_old_out)
if (authdir_mode(get_options()) && !had_router) {
const char *discard=NULL;
uint32_t status = dirserv_router_get_status(ri, &discard);
uint32_t status = dirserv_router_get_status(ri, &discard, LOG_INFO);
dirserv_set_node_flags_from_authoritative_status(node, status);
}