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authorNick Mathewson <nickm@torproject.org>2013-09-18 11:09:34 -0400
committerNick Mathewson <nickm@torproject.org>2013-09-20 11:00:27 -0400
commitfd2954d06d2e9b8b0d33bcd0a2e3dfb947ff662e (patch)
tree2381c98d6895a6830ecd4617c07bea2ca83526d9
parentaccadd8752bb26efeb31a5c866a16cc863963893 (diff)
downloadtor-fd2954d06d2e9b8b0d33bcd0a2e3dfb947ff662e.tar
tor-fd2954d06d2e9b8b0d33bcd0a2e3dfb947ff662e.tar.gz
Round down hidden service descriptor publication times to nearest hour
Implements part of proposal 222. We can do this safely, since REND_CACHE_MAX_SKEW is 24 hours.
-rw-r--r--changes/no_client_timestamps_0242
-rw-r--r--src/or/rendservice.c1
2 files changed, 3 insertions, 0 deletions
diff --git a/changes/no_client_timestamps_024 b/changes/no_client_timestamps_024
index 9ded8b3d9..488630fb3 100644
--- a/changes/no_client_timestamps_024
+++ b/changes/no_client_timestamps_024
@@ -10,3 +10,5 @@
- Stop sending timestamps in AUTHENTICATE cells. This is not such
a big deal from a security point of view, but it achieves no actual
good purpose, and isn't needed. Implements part of proposal 222.
+ - Reduce down accuracy of timestamps in hidden service descriptors.
+ Implements part of proposal 222.
diff --git a/src/or/rendservice.c b/src/or/rendservice.c
index 00bca17d4..8a4a11e47 100644
--- a/src/or/rendservice.c
+++ b/src/or/rendservice.c
@@ -593,6 +593,7 @@ rend_service_update_descriptor(rend_service_t *service)
d = service->desc = tor_malloc_zero(sizeof(rend_service_descriptor_t));
d->pk = crypto_pk_dup_key(service->private_key);
d->timestamp = time(NULL);
+ d->timestamp -= d->timestamp % 3600; /* Round down to nearest hour */
d->intro_nodes = smartlist_new();
/* Support intro protocols 2 and 3. */
d->protocols = (1 << 2) + (1 << 3);