diff options
Diffstat (limited to 'src/or/dirauth')
| -rw-r--r-- | src/or/dirauth/shared_random.c | 163 | ||||
| -rw-r--r-- | src/or/dirauth/shared_random.h | 8 | ||||
| -rw-r--r-- | src/or/dirauth/shared_random_state.c | 80 | ||||
| -rw-r--r-- | src/or/dirauth/shared_random_state.h | 5 |
4 files changed, 2 insertions, 254 deletions
diff --git a/src/or/dirauth/shared_random.c b/src/or/dirauth/shared_random.c index e9644adf9e..5dee77dce9 100644 --- a/src/or/dirauth/shared_random.c +++ b/src/or/dirauth/shared_random.c @@ -96,6 +96,7 @@ #include "router.h" #include "routerlist.h" #include "shared_random_state.h" +#include "shared_random_common.h" #include "util.h" #include "dirauth/dirvote.h" @@ -499,20 +500,6 @@ get_vote_line_from_commit(const sr_commit_t *commit, sr_phase_t phase) return vote_line; } -/* Convert a given srv object to a string for the control port. This doesn't - * fail and the srv object MUST be valid. */ -static char * -srv_to_control_string(const sr_srv_t *srv) -{ - char *srv_str; - char srv_hash_encoded[SR_SRV_VALUE_BASE64_LEN + 1]; - tor_assert(srv); - - sr_srv_encode(srv_hash_encoded, sizeof(srv_hash_encoded), srv); - tor_asprintf(&srv_str, "%s", srv_hash_encoded); - return srv_str; -} - /* Return a heap allocated string that contains the given <b>srv</b> string * representation formatted for a networkstatus document using the * <b>key</b> as the start of the line. This doesn't return NULL. */ @@ -875,27 +862,6 @@ get_majority_srv_from_votes(const smartlist_t *votes, int current) return the_srv; } -/* Encode the given shared random value and put it in dst. Destination - * buffer must be at least SR_SRV_VALUE_BASE64_LEN plus the NULL byte. */ -void -sr_srv_encode(char *dst, size_t dst_len, const sr_srv_t *srv) -{ - int ret; - /* Extra byte for the NULL terminated char. */ - char buf[SR_SRV_VALUE_BASE64_LEN + 1]; - - tor_assert(dst); - tor_assert(srv); - tor_assert(dst_len >= sizeof(buf)); - - ret = base64_encode(buf, sizeof(buf), (const char *) srv->value, - sizeof(srv->value), 0); - /* Always expect the full length without the NULL byte. */ - tor_assert(ret == (sizeof(buf) - 1)); - tor_assert(ret <= (int) dst_len); - strlcpy(dst, buf, dst_len); -} - /* Free a commit object. */ void sr_commit_free_(sr_commit_t *commit) @@ -1037,55 +1003,6 @@ sr_compute_srv(void) tor_free(reveals); } -/* Parse a list of arguments from a SRV value either from a vote, consensus - * or from our disk state and return a newly allocated srv object. NULL is - * returned on error. - * - * The arguments' order: - * num_reveals, value - */ -sr_srv_t * -sr_parse_srv(const smartlist_t *args) -{ - char *value; - int ok, ret; - uint64_t num_reveals; - sr_srv_t *srv = NULL; - - tor_assert(args); - - if (smartlist_len(args) < 2) { - goto end; - } - - /* First argument is the number of reveal values */ - num_reveals = tor_parse_uint64(smartlist_get(args, 0), - 10, 0, UINT64_MAX, &ok, NULL); - if (!ok) { - goto end; - } - /* Second and last argument is the shared random value it self. */ - value = smartlist_get(args, 1); - if (strlen(value) != SR_SRV_VALUE_BASE64_LEN) { - goto end; - } - - srv = tor_malloc_zero(sizeof(*srv)); - srv->num_reveals = num_reveals; - /* We subtract one byte from the srclen because the function ignores the - * '=' character in the given buffer. This is broken but it's a documented - * behavior of the implementation. */ - ret = base64_decode((char *) srv->value, sizeof(srv->value), value, - SR_SRV_VALUE_BASE64_LEN - 1); - if (ret != sizeof(srv->value)) { - tor_free(srv); - srv = NULL; - goto end; - } - end: - return srv; -} - /* Parse a commit from a vote or from our disk state and return a newly * allocated commit object. NULL is returned on error. * @@ -1353,84 +1270,6 @@ sr_save_and_cleanup(void) sr_cleanup(); } -/* Return the current SRV string representation for the control port. Return a - * newly allocated string on success containing the value else "" if not found - * or if we don't have a valid consensus yet. */ -char * -sr_get_current_for_control(void) -{ - char *srv_str; - const networkstatus_t *c = networkstatus_get_latest_consensus(); - if (c && c->sr_info.current_srv) { - srv_str = srv_to_control_string(c->sr_info.current_srv); - } else { - srv_str = tor_strdup(""); - } - return srv_str; -} - -/* Return the previous SRV string representation for the control port. Return - * a newly allocated string on success containing the value else "" if not - * found or if we don't have a valid consensus yet. */ -char * -sr_get_previous_for_control(void) -{ - char *srv_str; - const networkstatus_t *c = networkstatus_get_latest_consensus(); - if (c && c->sr_info.previous_srv) { - srv_str = srv_to_control_string(c->sr_info.previous_srv); - } else { - srv_str = tor_strdup(""); - } - return srv_str; -} - -/* Return current shared random value from the latest consensus. Caller can - * NOT keep a reference to the returned pointer. Return NULL if none. */ -const sr_srv_t * -sr_get_current(const networkstatus_t *ns) -{ - const networkstatus_t *consensus; - - /* Use provided ns else get a live one */ - if (ns) { - consensus = ns; - } else { - consensus = networkstatus_get_live_consensus(approx_time()); - } - /* Ideally we would never be asked for an SRV without a live consensus. Make - * sure this assumption is correct. */ - tor_assert_nonfatal(consensus); - - if (consensus) { - return consensus->sr_info.current_srv; - } - return NULL; -} - -/* Return previous shared random value from the latest consensus. Caller can - * NOT keep a reference to the returned pointer. Return NULL if none. */ -const sr_srv_t * -sr_get_previous(const networkstatus_t *ns) -{ - const networkstatus_t *consensus; - - /* Use provided ns else get a live one */ - if (ns) { - consensus = ns; - } else { - consensus = networkstatus_get_live_consensus(approx_time()); - } - /* Ideally we would never be asked for an SRV without a live consensus. Make - * sure this assumption is correct. */ - tor_assert_nonfatal(consensus); - - if (consensus) { - return consensus->sr_info.previous_srv; - } - return NULL; -} - #ifdef TOR_UNIT_TESTS /* Set the global value of number of SRV agreements so the test can play diff --git a/src/or/dirauth/shared_random.h b/src/or/dirauth/shared_random.h index 675a8d8b06..d1b2ac2e25 100644 --- a/src/or/dirauth/shared_random.h +++ b/src/or/dirauth/shared_random.h @@ -109,13 +109,11 @@ void sr_act_post_consensus(const networkstatus_t *consensus); void sr_handle_received_commits(smartlist_t *commits, crypto_pk_t *voter_key); sr_commit_t *sr_parse_commit(const smartlist_t *args); -sr_srv_t *sr_parse_srv(const smartlist_t *args); char *sr_get_string_for_vote(void); char *sr_get_string_for_consensus(const smartlist_t *votes, int32_t num_srv_agreements); void sr_commit_free_(sr_commit_t *commit); #define sr_commit_free(sr) FREE_AND_NULL(sr_commit_t, sr_commit_free_, (sr)) -void sr_srv_encode(char *dst, size_t dst_len, const sr_srv_t *srv); /* Private methods (only used by shared_random_state.c): */ static inline @@ -128,12 +126,6 @@ void sr_compute_srv(void); sr_commit_t *sr_generate_our_commit(time_t timestamp, const authority_cert_t *my_rsa_cert); -char *sr_get_current_for_control(void); -char *sr_get_previous_for_control(void); - -const sr_srv_t *sr_get_current(const networkstatus_t *ns); -const sr_srv_t *sr_get_previous(const networkstatus_t *ns); - #ifdef SHARED_RANDOM_PRIVATE /* Encode */ diff --git a/src/or/dirauth/shared_random_state.c b/src/or/dirauth/shared_random_state.c index 11d7a06378..846c3c7aa2 100644 --- a/src/or/dirauth/shared_random_state.c +++ b/src/or/dirauth/shared_random_state.c @@ -17,6 +17,7 @@ #include "networkstatus.h" #include "router.h" #include "shared_random_state.h" +#include "shared_random_common.h" #include "dirauth/dirvote.h" @@ -54,10 +55,6 @@ DUMMY_TYPECHECK_INSTANCE(sr_disk_state_t); VAR(#member, conftype, member, initvalue) /* Our persistent state magic number. */ #define SR_DISK_STATE_MAGIC 0x98AB1254 -/* Each protocol phase has 12 rounds */ -#define SHARED_RANDOM_N_ROUNDS 12 -/* Number of phase we have in a protocol. */ -#define SHARED_RANDOM_N_PHASES 2 static int disk_state_validate_cb(void *old_state, void *state, void *default_state, @@ -116,81 +113,6 @@ get_phase_str(sr_phase_t phase) return the_string; } - -/* Return the voting interval of the tor vote subsystem. */ -static int -get_voting_interval(void) -{ - int interval; - networkstatus_t *consensus = networkstatus_get_live_consensus(time(NULL)); - - if (consensus) { - interval = (int)(consensus->fresh_until - consensus->valid_after); - } else { - /* Same for both a testing and real network. We voluntarily ignore the - * InitialVotingInterval since it complexifies things and it doesn't - * affect the SR protocol. */ - interval = get_options()->V3AuthVotingInterval; - } - tor_assert(interval > 0); - return interval; -} - -/* Given the time <b>now</b>, return the start time of the current round of - * the SR protocol. For example, if it's 23:47:08, the current round thus - * started at 23:47:00 for a voting interval of 10 seconds. */ -STATIC time_t -get_start_time_of_current_round(void) -{ - const or_options_t *options = get_options(); - int voting_interval = get_voting_interval(); - /* First, get the start time of the next round */ - time_t next_start = dirvote_get_next_valid_after_time(); - /* Now roll back next_start by a voting interval to find the start time of - the current round. */ - time_t curr_start = dirvote_get_start_of_next_interval( - next_start - voting_interval - 1, - voting_interval, - options->TestingV3AuthVotingStartOffset); - return curr_start; -} - -/** Return the start time of the current SR protocol run. For example, if the - * time is 23/06/2017 23:47:08 and a full SR protocol run is 24 hours, this - * function should return 23/06/2017 00:00:00. */ -time_t -sr_state_get_start_time_of_current_protocol_run(time_t now) -{ - int total_rounds = SHARED_RANDOM_N_ROUNDS * SHARED_RANDOM_N_PHASES; - int voting_interval = get_voting_interval(); - /* Find the time the current round started. */ - time_t beginning_of_current_round = get_start_time_of_current_round(); - - /* Get current SR protocol round */ - int current_round = (now / voting_interval) % total_rounds; - - /* Get start time by subtracting the time elapsed from the beginning of the - protocol run */ - time_t time_elapsed_since_start_of_run = current_round * voting_interval; - return beginning_of_current_round - time_elapsed_since_start_of_run; -} - -/** Return the time (in seconds) it takes to complete a full SR protocol phase - * (e.g. the commit phase). */ -unsigned int -sr_state_get_phase_duration(void) -{ - return SHARED_RANDOM_N_ROUNDS * get_voting_interval(); -} - -/** Return the time (in seconds) it takes to complete a full SR protocol run */ -unsigned int -sr_state_get_protocol_run_duration(void) -{ - int total_protocol_rounds = SHARED_RANDOM_N_ROUNDS * SHARED_RANDOM_N_PHASES; - return total_protocol_rounds * get_voting_interval(); -} - /* Return the time we should expire the state file created at <b>now</b>. * We expire the state file in the beginning of the next protocol run. */ STATIC time_t diff --git a/src/or/dirauth/shared_random_state.h b/src/or/dirauth/shared_random_state.h index fdbbf4919a..60a326f86c 100644 --- a/src/or/dirauth/shared_random_state.h +++ b/src/or/dirauth/shared_random_state.h @@ -121,16 +121,11 @@ int sr_state_is_initialized(void); void sr_state_save(void); void sr_state_free_all(void); -time_t sr_state_get_start_time_of_current_protocol_run(time_t now); -unsigned int sr_state_get_phase_duration(void); -unsigned int sr_state_get_protocol_run_duration(void); - #ifdef SHARED_RANDOM_STATE_PRIVATE STATIC int disk_state_load_from_disk_impl(const char *fname); STATIC sr_phase_t get_sr_protocol_phase(time_t valid_after); -STATIC time_t get_start_time_of_current_round(void); STATIC time_t get_state_valid_until_time(time_t now); STATIC const char *get_phase_str(sr_phase_t phase); |