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Tor
0.4.7.0-alpha-dev
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Contains code shared between different HS protocol version as well as useful data structures and accessors used by other subsystems. More...
#include "core/or/or.h"#include "app/config/config.h"#include "core/or/circuitbuild.h"#include "core/or/policies.h"#include "core/or/extendinfo.h"#include "feature/dirauth/shared_random_state.h"#include "feature/hs/hs_cache.h"#include "feature/hs/hs_circuitmap.h"#include "feature/hs/hs_client.h"#include "feature/hs/hs_common.h"#include "feature/hs/hs_dos.h"#include "feature/hs/hs_ob.h"#include "feature/hs/hs_ident.h"#include "feature/hs/hs_service.h"#include "feature/hs_common/shared_random_client.h"#include "feature/nodelist/describe.h"#include "feature/nodelist/microdesc.h"#include "feature/nodelist/networkstatus.h"#include "feature/nodelist/nodelist.h"#include "feature/nodelist/routerset.h"#include "feature/rend/rendcommon.h"#include "feature/relay/routermode.h"#include "lib/crypt_ops/crypto_rand.h"#include "lib/crypt_ops/crypto_util.h"#include "lib/net/resolve.h"#include "core/or/edge_connection_st.h"#include "feature/nodelist/networkstatus_st.h"#include "feature/nodelist/node_st.h"#include "core/or/origin_circuit_st.h"#include "feature/nodelist/routerstatus_st.h"#include "trunnel/ed25519_cert.h"Go to the source code of this file.
Macros | |
| #define | HS_COMMON_PRIVATE |
| #define | MAX_REND_FAILURES_DEFAULT 2 |
| #define | MAX_REND_FAILURES_MIN 1 |
| #define | MAX_REND_FAILURES_MAX 10 |
Functions | |
| static int | set_unix_port (edge_connection_t *conn, hs_port_config_t *p) |
| static int | add_unix_port (smartlist_t *ports, hs_port_config_t *p) |
| static int | compare_digest_to_fetch_hsdir_index (const void *_key, const void **_member) |
| static int | compare_digest_to_store_first_hsdir_index (const void *_key, const void **_member) |
| static int | compare_digest_to_store_second_hsdir_index (const void *_key, const void **_member) |
| static int | compare_node_fetch_hsdir_index (const void **a, const void **b) |
| static int | compare_node_store_first_hsdir_index (const void **a, const void **b) |
| static int | compare_node_store_second_hsdir_index (const void **a, const void **b) |
| char * | hs_path_from_filename (const char *directory, const char *filename) |
| int | hs_check_service_private_dir (const char *username, const char *path, unsigned int dir_group_readable, unsigned int create) |
| int | hs_get_service_max_rend_failures (void) |
| STATIC uint64_t | get_time_period_length (void) |
| uint64_t | hs_get_time_period_num (time_t now) |
| uint64_t | hs_get_next_time_period_num (time_t now) |
| uint64_t | hs_get_previous_time_period_num (time_t now) |
| time_t | hs_get_start_time_of_next_time_period (time_t now) |
| static void | compute_disaster_srv (uint64_t time_period_num, uint8_t *srv_out) |
| STATIC void | get_disaster_srv (uint64_t time_period_num, uint8_t *srv_out) |
| static void | build_blinded_key_param (const ed25519_public_key_t *pubkey, const uint8_t *secret, size_t secret_len, uint64_t period_num, uint64_t period_length, uint8_t *param_out) |
| static void | build_hs_checksum (const ed25519_public_key_t *key, uint8_t version, uint8_t *checksum_out) |
| static void | build_hs_address (const ed25519_public_key_t *key, const uint8_t *checksum, uint8_t version, char *addr_out) |
| static void | hs_parse_address_impl (const char *address, ed25519_public_key_t *key_out, uint8_t *checksum_out, uint8_t *version_out) |
| void | hs_get_subcredential (const ed25519_public_key_t *identity_pk, const ed25519_public_key_t *blinded_pk, hs_subcredential_t *subcred_out) |
| int | hs_set_conn_addr_port (const smartlist_t *ports, edge_connection_t *conn) |
| static hs_port_config_t * | hs_port_config_new (const char *socket_path) |
| hs_port_config_t * | hs_parse_port_config (const char *string, const char *sep, char **err_msg_out) |
| void | hs_port_config_free_ (hs_port_config_t *p) |
| int | hs_parse_address_no_log (const char *address, ed25519_public_key_t *key_out, uint8_t *checksum_out, uint8_t *version_out, const char **errmsg) |
| int | hs_parse_address (const char *address, ed25519_public_key_t *key_out, uint8_t *checksum_out, uint8_t *version_out) |
| int | hs_address_is_valid (const char *address) |
| void | hs_build_address (const ed25519_public_key_t *key, uint8_t version, char *addr_out) |
| void | hs_build_blinded_pubkey (const ed25519_public_key_t *pk, const uint8_t *secret, size_t secret_len, uint64_t time_period_num, ed25519_public_key_t *blinded_pk_out) |
| void | hs_build_blinded_keypair (const ed25519_keypair_t *kp, const uint8_t *secret, size_t secret_len, uint64_t time_period_num, ed25519_keypair_t *blinded_kp_out) |
| int | hs_in_period_between_tp_and_srv (const networkstatus_t *consensus, time_t now) |
| int | hs_service_requires_uptime_circ (const smartlist_t *ports) |
| void | hs_build_hs_index (uint64_t replica, const ed25519_public_key_t *blinded_pk, uint64_t period_num, uint8_t *hs_index_out) |
| void | hs_build_hsdir_index (const ed25519_public_key_t *identity_pk, const uint8_t *srv_value, uint64_t period_num, uint8_t *hsdir_index_out) |
| uint8_t * | hs_get_current_srv (uint64_t time_period_num, const networkstatus_t *ns) |
| uint8_t * | hs_get_previous_srv (uint64_t time_period_num, const networkstatus_t *ns) |
| int32_t | hs_get_hsdir_n_replicas (void) |
| int32_t | hs_get_hsdir_spread_fetch (void) |
| int32_t | hs_get_hsdir_spread_store (void) |
| static int | node_has_hsdir_index (const node_t *node) |
| void | hs_get_responsible_hsdirs (const ed25519_public_key_t *blinded_pk, uint64_t time_period_num, int use_second_hsdir_index, int for_fetching, smartlist_t *responsible_dirs) |
| time_t | hs_hsdir_requery_period (const or_options_t *options) |
| STATIC strmap_t * | get_last_hid_serv_requests (void) |
| time_t | hs_lookup_last_hid_serv_request (routerstatus_t *hs_dir, const char *req_key_str, time_t now, int set) |
| void | hs_clean_last_hid_serv_requests (time_t now) |
| void | hs_purge_hid_serv_from_last_hid_serv_requests (const char *req_key_str) |
| void | hs_purge_last_hid_serv_requests (void) |
| routerstatus_t * | hs_pick_hsdir (smartlist_t *responsible_dirs, const char *req_key_str, bool *is_rate_limited_out) |
| extend_info_t * | hs_get_extend_info_from_lspecs (const smartlist_t *lspecs, const curve25519_public_key_t *onion_key, int direct_conn) |
| void | hs_init (void) |
| void | hs_free_all (void) |
| void | hs_dec_rdv_stream_counter (origin_circuit_t *circ) |
| void | hs_inc_rdv_stream_counter (origin_circuit_t *circ) |
| link_specifier_t * | link_specifier_dup (const link_specifier_t *src) |
Variables | |
| static const char * | str_ed25519_basepoint |
| static uint8_t | cached_disaster_srv [2][DIGEST256_LEN] |
| static uint64_t | cached_time_period_nums [2] = {0} |
| static strmap_t * | last_hid_serv_requests_ = NULL |
Contains code shared between different HS protocol version as well as useful data structures and accessors used by other subsystems.
Definition in file hs_common.c.
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When creating a blinded key, we need a parameter which construction is as follow: H(pubkey | [secret] | ed25519-basepoint | nonce).
The nonce has a pre-defined format which uses the time period number period_num and the start of the period in second start_time_period.
The secret of size secret_len is optional meaning that it can be NULL and thus will be ignored for the param construction.
The result is put in param_out.
Definition at line 436 of file hs_common.c.
Referenced by hs_build_blinded_keypair(), and hs_build_blinded_pubkey().
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Using an ed25519 public key, checksum and version to build the binary representation of a service address. Put in addr_out. Format is: addr_out = PUBKEY || CHECKSUM || VERSION
addr_out must be large enough to receive HS_SERVICE_ADDR_LEN bytes.
Definition at line 512 of file hs_common.c.
Referenced by hs_build_address().
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Using an ed25519 public key and version to build the checksum of an address. Put in checksum_out. Format is: SHA3-256(".onion checksum" || PUBKEY || VERSION)
checksum_out must be large enough to receive 32 bytes (DIGEST256_LEN).
Definition at line 485 of file hs_common.c.
Referenced by hs_address_is_valid(), and hs_build_address().
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Helper function: The key is a digest that we compare to a node_t object current hsdir_index.
Definition at line 113 of file hs_common.c.
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Helper function: The key is a digest that we compare to a node_t object next hsdir_index.
Definition at line 123 of file hs_common.c.
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Helper function: The key is a digest that we compare to a node_t object next hsdir_index.
Definition at line 134 of file hs_common.c.
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Helper function: Compare two node_t objects current hsdir_index.
Definition at line 144 of file hs_common.c.
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Helper function: Compare two node_t objects next hsdir_index.
Definition at line 155 of file hs_common.c.
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Helper function: Compare two node_t objects next hsdir_index.
Definition at line 166 of file hs_common.c.
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Using the given time period number, compute the disaster shared random value and put it in srv_out. It MUST be at least DIGEST256_LEN bytes.
Definition at line 340 of file hs_common.c.
| STATIC void get_disaster_srv | ( | uint64_t | time_period_num, |
| uint8_t * | srv_out | ||
| ) |
Compute the disaster SRV value for this time_period_num and put it in srv_out (of size at least DIGEST256_LEN). First check our caches to see if we have already computed it.
Definition at line 384 of file hs_common.c.
| STATIC strmap_t* get_last_hid_serv_requests | ( | void | ) |
Returns last_hid_serv_requests_, initializing it to a new strmap if necessary.
Definition at line 1366 of file hs_common.c.
Referenced by hs_clean_last_hid_serv_requests(), hs_lookup_last_hid_serv_request(), and hs_purge_hid_serv_from_last_hid_serv_requests().
| STATIC uint64_t get_time_period_length | ( | void | ) |
Get the default HS time period length in minutes from the consensus.
Definition at line 243 of file hs_common.c.
Referenced by hs_build_blinded_keypair(), hs_build_blinded_pubkey(), hs_get_start_time_of_next_time_period(), and hs_get_time_period_num().
| int hs_address_is_valid | ( | const char * | address | ) |
Validate a given onion address. The length, the base32 decoding, and checksum are validated. Return 1 if valid else 0.
Definition at line 856 of file hs_common.c.
Referenced by connection_control_closed(), handle_control_hspost(), and hs_build_address().
| void hs_build_address | ( | const ed25519_public_key_t * | key, |
| uint8_t | version, | ||
| char * | addr_out | ||
| ) |
Build a service address using an ed25519 public key and a given version. The returned address is base32 encoded and put in addr_out. The caller MUST make sure the addr_out is at least HS_SERVICE_ADDR_LEN_BASE32 + 1 long.
Format is as follows: base32(PUBKEY || CHECKSUM || VERSION) CHECKSUM = H(".onion checksum" || PUBKEY || VERSION)
Definition at line 901 of file hs_common.c.
Referenced by client_get_random_intro(), hs_control_desc_event_content(), hs_control_desc_event_failed(), hs_control_desc_event_received(), hs_control_desc_event_requested(), and hs_control_desc_event_uploaded().
| void hs_build_blinded_keypair | ( | const ed25519_keypair_t * | kp, |
| const uint8_t * | secret, | ||
| size_t | secret_len, | ||
| uint64_t | time_period_num, | ||
| ed25519_keypair_t * | blinded_kp_out | ||
| ) |
From a given ed25519 keypair kp and an optional secret, compute a blinded keypair for the current time period and put it in blinded_kp_out. This is only useful by the service side because the client doesn't have access to the identity secret key.
Definition at line 951 of file hs_common.c.
Referenced by build_service_desc_keys().
| void hs_build_blinded_pubkey | ( | const ed25519_public_key_t * | pk, |
| const uint8_t * | secret, | ||
| size_t | secret_len, | ||
| uint64_t | time_period_num, | ||
| ed25519_public_key_t * | blinded_pk_out | ||
| ) |
From a given ed25519 public key pk and an optional secret, compute a blinded public key and put it in blinded_pk_out. This is only useful to the client side because the client only has access to the identity public key of the service.
Definition at line 927 of file hs_common.c.
Referenced by build_subcredential(), directory_launch_v3_desc_fetch(), hs_client_decode_descriptor(), pick_hsdir_v3(), and purge_hid_serv_request().
| void hs_build_hs_index | ( | uint64_t | replica, |
| const ed25519_public_key_t * | blinded_pk, | ||
| uint64_t | period_num, | ||
| uint8_t * | hs_index_out | ||
| ) |
Build hs_index which is used to find the responsible hsdirs. This index value is used to select the responsible HSDir where their hsdir_index is closest to this value. SHA3-256("store-at-idx" | blinded_public_key | INT_8(replicanum) | INT_8(period_length) | INT_8(period_num) )
hs_index_out must be large enough to receive DIGEST256_LEN bytes.
Definition at line 1037 of file hs_common.c.
| void hs_build_hsdir_index | ( | const ed25519_public_key_t * | identity_pk, |
| const uint8_t * | srv_value, | ||
| uint64_t | period_num, | ||
| uint8_t * | hsdir_index_out | ||
| ) |
Build hsdir_index which is used to find the responsible hsdirs. This is the index value that is compare to the hs_index when selecting an HSDir. SHA3-256("node-idx" | node_identity | shared_random_value | INT_8(period_length) | INT_8(period_num) )
hsdir_index_out must be large enough to receive DIGEST256_LEN bytes.
Definition at line 1078 of file hs_common.c.
| int hs_check_service_private_dir | ( | const char * | username, |
| const char * | path, | ||
| unsigned int | dir_group_readable, | ||
| unsigned int | create | ||
| ) |
Make sure that the directory for service is private, using the config username.
If create is true:
Definition at line 200 of file hs_common.c.
Referenced by load_service_keys().
| void hs_clean_last_hid_serv_requests | ( | time_t | now | ) |
Clean the history of request times to hidden service directories, so that it does not contain requests older than REND_HID_SERV_DIR_REQUERY_PERIOD seconds any more.
Definition at line 1413 of file hs_common.c.
| void hs_dec_rdv_stream_counter | ( | origin_circuit_t * | circ | ) |
For the given origin circuit circ, decrement the number of rendezvous stream counter. This handles every hidden service version.
Definition at line 1722 of file hs_common.c.
| void hs_free_all | ( | void | ) |
Release and cleanup all memory of the HS subsystem (all version). This is called by tor_free_all().
Definition at line 1710 of file hs_common.c.
| uint8_t* hs_get_current_srv | ( | uint64_t | time_period_num, |
| const networkstatus_t * | ns | ||
| ) |
Return a newly allocated buffer containing the current shared random value or if not present, a disaster value is computed using the given time period number. If a consensus is provided in ns, use it to get the SRV value. This function can't fail.
Definition at line 1117 of file hs_common.c.
| extend_info_t* hs_get_extend_info_from_lspecs | ( | const smartlist_t * | lspecs, |
| const curve25519_public_key_t * | onion_key, | ||
| int | direct_conn | ||
| ) |
Given a list of link specifiers lspecs, a curve 25519 onion_key, and a direct connection boolean direct_conn (true for single onion services), return a newly allocated extend_info_t object.
This function always returns an extend info with a valid IP address and ORPort, or NULL. If direct_conn is false, the IP address is always IPv4.
It performs the following checks: if there is no usable IP address, or legacy ID is missing, return NULL. if direct_conn, and we can't reach any IP address, return NULL.
Definition at line 1596 of file hs_common.c.
Referenced by desc_intro_point_to_extend_info(), and launch_rendezvous_point_circuit().
| int32_t hs_get_hsdir_n_replicas | ( | void | ) |
Return the number of replicas defined by a consensus parameter or the default value.
Definition at line 1152 of file hs_common.c.
| int32_t hs_get_hsdir_spread_fetch | ( | void | ) |
Return the spread fetch value defined by a consensus parameter or the default value.
Definition at line 1162 of file hs_common.c.
| int32_t hs_get_hsdir_spread_store | ( | void | ) |
Return the spread store value defined by a consensus parameter or the default value.
Definition at line 1172 of file hs_common.c.
| uint64_t hs_get_next_time_period_num | ( | time_t | now | ) |
Get the number of the upcoming HS time period, given that the current time is now. If now is not set, we try to get the time from a live consensus.
Definition at line 306 of file hs_common.c.
Referenced by build_descriptors_for_new_service(), and hs_get_start_time_of_next_time_period().
| uint8_t* hs_get_previous_srv | ( | uint64_t | time_period_num, |
| const networkstatus_t * | ns | ||
| ) |
Return a newly allocated buffer containing the previous shared random value or if not present, a disaster value is computed using the given time period number. This function can't fail.
Definition at line 1135 of file hs_common.c.
| uint64_t hs_get_previous_time_period_num | ( | time_t | now | ) |
Get the number of the previous HS time period, given that the current time is now. If now is not set, we try to get the time from a live consensus.
Definition at line 315 of file hs_common.c.
Referenced by build_descriptors_for_new_service().
| void hs_get_responsible_hsdirs | ( | const ed25519_public_key_t * | blinded_pk, |
| uint64_t | time_period_num, | ||
| int | use_second_hsdir_index, | ||
| int | for_fetching, | ||
| smartlist_t * | responsible_dirs | ||
| ) |
For a given blinded key and time period number, get the responsible HSDir and put their routerstatus_t object in the responsible_dirs list. If 'use_second_hsdir_index' is true, use the second hsdir_index of the node_t is used. If 'for_fetching' is true, the spread fetch consensus parameter is used else the spread store is used which is only for upload. This function can't fail but it is possible that the responsible_dirs list contains fewer nodes than expected.
This function goes over the latest consensus routerstatus list and sorts it by their node_t hsdir_index then does a binary search to find the closest node. All of this makes it a bit CPU intensive so use it wisely.
Definition at line 1224 of file hs_common.c.
Referenced by pick_hsdir_v3(), and upload_descriptor_to_all().
| int hs_get_service_max_rend_failures | ( | void | ) |
How many times will a hidden service operator attempt to connect to a requested rendezvous point before giving up?
Definition at line 233 of file hs_common.c.
| time_t hs_get_start_time_of_next_time_period | ( | time_t | now | ) |
Return the start time of the upcoming time period based on now. If now is not set, we try to get the time ourselves from a live consensus.
Definition at line 324 of file hs_common.c.
Referenced by hs_in_period_between_tp_and_srv(), and rep_hist_hs_stats_init().
| void hs_get_subcredential | ( | const ed25519_public_key_t * | identity_pk, |
| const ed25519_public_key_t * | blinded_pk, | ||
| hs_subcredential_t * | subcred_out | ||
| ) |
Using the given identity public key and a blinded public key, compute the subcredential and put it in subcred_out. This can't fail.
Definition at line 565 of file hs_common.c.
Referenced by build_service_desc_plaintext(), build_subcredential(), and hs_client_decode_descriptor().
| uint64_t hs_get_time_period_num | ( | time_t | now | ) |
Get the HS time period number at time now. If now is not set, we try to get the time ourselves from a live consensus.
Definition at line 269 of file hs_common.c.
Referenced by build_descriptors_for_new_service(), compute_subcredentials(), directory_launch_v3_desc_fetch(), hs_client_decode_descriptor(), hs_get_next_time_period_num(), hs_get_previous_time_period_num(), pick_hsdir_v3(), and purge_hid_serv_request().
| time_t hs_hsdir_requery_period | ( | const or_options_t * | options | ) |
Return the period for which a hidden service directory cannot be queried for the same descriptor ID again, taking TestingTorNetwork into account.
Definition at line 1337 of file hs_common.c.
Referenced by hs_clean_last_hid_serv_requests().
| int hs_in_period_between_tp_and_srv | ( | const networkstatus_t * | consensus, |
| time_t | now | ||
| ) |
Return true if we are currently in the time segment between a new time period and a new SRV (in the real network that happens between 12:00 and 00:00 UTC). Here is a diagram showing exactly when this returns true:
+---------------------------------------------------------------—+ | | | 00:00 12:00 00:00 12:00 00:00 12:00 | | SRV#1 TP#1 SRV#2 TP#2 SRV#3 TP#3 | | | | $==========|--------—$===========|--------—$===========| | | ^^^^^^^^^^^^ ^^^^^^^^^^^^ | | | +---------------------------------------------------------------—+
Definition at line 987 of file hs_common.c.
Referenced by build_descriptors_for_new_service().
| void hs_inc_rdv_stream_counter | ( | origin_circuit_t * | circ | ) |
For the given origin circuit circ, increment the number of rendezvous stream counter. This handles every hidden service version.
Definition at line 1737 of file hs_common.c.
| void hs_init | ( | void | ) |
Initialize the entire HS subsystem. This is called in tor_init() before any torrc options are loaded. Only for >= v3.
Definition at line 1700 of file hs_common.c.
Referenced by tor_init().
| time_t hs_lookup_last_hid_serv_request | ( | routerstatus_t * | hs_dir, |
| const char * | req_key_str, | ||
| time_t | now, | ||
| int | set | ||
| ) |
Look up the last request time to hidden service directory hs_dir for descriptor request key req_key_str which is the blinded key for v3. If set is non-zero, assign the current time now and return that. Otherwise, return the most recent request time, or 0 if no such request has been sent before.
Definition at line 1379 of file hs_common.c.
| int hs_parse_address | ( | const char * | address, |
| ed25519_public_key_t * | key_out, | ||
| uint8_t * | checksum_out, | ||
| uint8_t * | version_out | ||
| ) |
Same has hs_parse_address_no_log() but emits a log warning on parsing failure.
Definition at line 840 of file hs_common.c.
Referenced by hs_address_is_valid(), and hs_service_del_ephemeral().
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Helper for hs_parse_address(): Using a binary representation of a service address, parse its content into the key_out, checksum_out and version_out. Any out variable can be NULL in case the caller would want only one field. checksum_out MUST at least be 2 bytes long. address must be at least HS_SERVICE_ADDR_LEN bytes but doesn't need to be NUL terminated.
Definition at line 535 of file hs_common.c.
Referenced by hs_parse_address_no_log().
| int hs_parse_address_no_log | ( | const char * | address, |
| ed25519_public_key_t * | key_out, | ||
| uint8_t * | checksum_out, | ||
| uint8_t * | version_out, | ||
| const char ** | errmsg | ||
| ) |
Using a base32 representation of a service address, parse its content into the key_out, checksum_out and version_out. Any out variable can be NULL in case the caller would want only one field. checksum_out MUST at least be 2 bytes long.
Return 0 if parsing went well; return -1 in case of error and if errmsg is non NULL, a human readable string message is set.
Definition at line 800 of file hs_common.c.
Referenced by hs_parse_address().
| hs_port_config_t* hs_parse_port_config | ( | const char * | string, |
| const char * | sep, | ||
| char ** | err_msg_out | ||
| ) |
Parses a virtual-port to real-port/socket mapping separated by the provided separator and returns a new hs_port_config_t, or NULL and an optional error string on failure.
The format is: VirtualPort SEP (IP|RealPort|IP:RealPort|'socket':path)?
IP defaults to 127.0.0.1; RealPort defaults to VirtualPort.
Definition at line 685 of file hs_common.c.
| char* hs_path_from_filename | ( | const char * | directory, |
| const char * | filename | ||
| ) |
Allocate and return a string containing the path to filename in directory. This function will never return NULL. The caller must free this path.
Definition at line 178 of file hs_common.c.
Referenced by get_client_auth_creds_filename(), hs_ob_parse_config_file(), load_client_keys(), load_service_keys(), service_add_fnames_to_list(), and service_key_on_disk().
| routerstatus_t* hs_pick_hsdir | ( | smartlist_t * | responsible_dirs, |
| const char * | req_key_str, | ||
| bool * | is_rate_limited_out | ||
| ) |
Given the list of responsible HSDirs in responsible_dirs, pick the one that we should use to fetch a descriptor right now. Take into account previous failed attempts at fetching this descriptor from HSDirs using the string identifier req_key_str. We return whether we are rate limited into *is_rate_limited_out if it is not NULL.
Steals ownership of responsible_dirs.
Return the routerstatus of the chosen HSDir if successful, otherwise return NULL if no HSDirs are worth trying right now.
Definition at line 1509 of file hs_common.c.
| void hs_port_config_free_ | ( | hs_port_config_t * | p | ) |
Release all storage held in a hs_port_config_t.
Definition at line 787 of file hs_common.c.
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static |
Return a new hs_port_config_t with its path set to socket_path or empty if socket_path is NULL
Definition at line 663 of file hs_common.c.
| void hs_purge_hid_serv_from_last_hid_serv_requests | ( | const char * | req_key_str | ) |
Remove all requests related to the descriptor request key string req_key_str from the history of times of requests to hidden service directories.
This is called from purge_hid_serv_request(), which must be idempotent, so any future changes to this function must leave it idempotent too.
Definition at line 1441 of file hs_common.c.
Referenced by purge_hid_serv_request().
| void hs_purge_last_hid_serv_requests | ( | void | ) |
Purge the history of request times to hidden service directories, so that future lookups of an HS descriptor will not fail because we accessed all of the HSDir relays responsible for the descriptor recently.
Definition at line 1481 of file hs_common.c.
Referenced by hs_client_free_all().
| int hs_service_requires_uptime_circ | ( | const smartlist_t * | ports | ) |
Return 1 if any virtual port in ports needs a circuit with good uptime. Else return 0.
Definition at line 1016 of file hs_common.c.
Referenced by launch_rendezvous_point_circuit().
| int hs_set_conn_addr_port | ( | const smartlist_t * | ports, |
| edge_connection_t * | conn | ||
| ) |
From the given list of hidden service ports, find the ones that match the given edge connection conn, pick one at random and use it to set the connection address. Return 0 on success or -1 if none.
Definition at line 606 of file hs_common.c.
| link_specifier_t* link_specifier_dup | ( | const link_specifier_t * | src | ) |
Return a newly allocated link specifier object that is a copy of dst.
Definition at line 1751 of file hs_common.c.
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static |
node is an HSDir so make sure that we have assigned an hsdir index. Return 0 if everything is as expected, else return -1.
Definition at line 1182 of file hs_common.c.
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static |
Due to the high cost of computing the disaster SRV and that potentially we would have to do it thousands of times in a row, we always cache the computer disaster SRV (and its corresponding time period num) in case we want to reuse it soon after. We need to cache two SRVs, one for each active time period.
Definition at line 377 of file hs_common.c.
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Tracks requests for fetching hidden service descriptors. It's used by hidden service clients, to avoid querying HSDirs that have already failed giving back a descriptor. The same data structure is used to track v3 HS descriptor requests.
The string map is a key/value store that contains the last request times to hidden service directories for certain queries. Specifically:
key = base32(hsdir_identity) + base32(hs_identity) value = time_t of last request for that hs_identity to that HSDir
where 'hsdir_identity' is the identity digest of the HSDir node, and 'hs_identity' is the ed25519 blinded public key of the HS for v3.
Definition at line 1361 of file hs_common.c.
Referenced by get_last_hid_serv_requests(), and hs_purge_last_hid_serv_requests().
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static |
Ed25519 Basepoint value. Taken from section 5 of https://tools.ietf.org/html/draft-josefsson-eddsa-ed25519-03
Definition at line 50 of file hs_common.c.
1.9.1