[tor-commits] [tor/master] Hiding crypt_path_t: Create a constructor for crypt_path_t.
dgoulet at torproject.org
dgoulet at torproject.org
Wed May 8 12:21:47 UTC 2019
commit f5635989b06260710b282e75be7b731e2846f700
Author: George Kadianakis <desnacked at riseup.net>
Date: Mon Apr 8 16:18:44 2019 +0300
Hiding crypt_path_t: Create a constructor for crypt_path_t.
We are using an opaque pointer so the structure needs to be allocated on the
heap. This means we now need a constructor for crypt_path_t.
Also modify all places initializing a crypt_path_t to use the constructor.
---
src/core/or/crypt_path.c | 15 +++++++++++++--
src/core/or/crypt_path.h | 2 ++
src/core/or/crypt_path_st.h | 5 ++---
src/feature/hs/hs_circuit.c | 3 +--
src/feature/rend/rendclient.c | 5 ++---
src/feature/rend/rendservice.c | 3 +--
src/test/test_circuitpadding.c | 13 +++++++------
src/test/test_hs_client.c | 5 ++---
src/test/test_hs_service.c | 4 ++--
src/test/test_relaycell.c | 4 ++--
src/test/test_relaycrypt.c | 2 +-
11 files changed, 35 insertions(+), 26 deletions(-)
diff --git a/src/core/or/crypt_path.c b/src/core/or/crypt_path.c
index 54f5623d3..975af6c16 100644
--- a/src/core/or/crypt_path.c
+++ b/src/core/or/crypt_path.c
@@ -26,6 +26,17 @@
#include "core/or/crypt_path_st.h"
#include "core/or/cell_st.h"
+/** Initialize and return a minimal crypt_path_t */
+crypt_path_t *
+crypt_path_new(void)
+{
+ crypt_path_t *cpath = tor_malloc_zero(sizeof(crypt_path_t));
+ cpath->magic = CRYPT_PATH_MAGIC;
+ cpath->private = tor_malloc_zero(sizeof(struct crypt_path_private_t));
+
+ return cpath;
+}
+
/** Add <b>new_hop</b> to the end of the doubly-linked-list <b>head_ptr</b>.
* This function is used to extend cpath by another hop.
*/
@@ -49,12 +60,11 @@ onion_append_to_cpath(crypt_path_t **head_ptr, crypt_path_t *new_hop)
int
onion_append_hop(crypt_path_t **head_ptr, extend_info_t *choice)
{
- crypt_path_t *hop = tor_malloc_zero(sizeof(crypt_path_t));
+ crypt_path_t *hop = crypt_path_new();
/* link hop into the cpath, at the end. */
onion_append_to_cpath(head_ptr, hop);
- hop->magic = CRYPT_PATH_MAGIC;
hop->state = CPATH_STATE_CLOSED;
hop->extend_info = extend_info_dup(choice);
@@ -158,6 +168,7 @@ circuit_free_cpath_node(crypt_path_t *victim)
onion_handshake_state_release(&victim->handshake_state);
crypto_dh_free(victim->rend_dh_handshake_state);
extend_info_free(victim->extend_info);
+ tor_free(victim->private);
memwipe(victim, 0xBB, sizeof(crypt_path_t)); /* poison memory */
tor_free(victim);
diff --git a/src/core/or/crypt_path.h b/src/core/or/crypt_path.h
index e8455c632..c6d1cd140 100644
--- a/src/core/or/crypt_path.h
+++ b/src/core/or/crypt_path.h
@@ -3,6 +3,8 @@
* \brief Header file for crypt_path.c.
**/
+crypt_path_t *crypt_path_new(void);
+
/* rename */
void assert_cpath_layer_ok(const crypt_path_t *cp);
diff --git a/src/core/or/crypt_path_st.h b/src/core/or/crypt_path_st.h
index 833cfefad..7da3c57f4 100644
--- a/src/core/or/crypt_path_st.h
+++ b/src/core/or/crypt_path_st.h
@@ -8,9 +8,6 @@
#define CRYPT_PATH_ST_H
#include "core/or/relay_crypto_st.h"
-struct crypto_dh_t;
-
-#define CRYPT_PATH_MAGIC 0x70127012u
struct fast_handshake_state_t;
struct ntor_handshake_state_t;
@@ -26,6 +23,8 @@ struct onion_handshake_state_t {
#ifdef CRYPT_PATH_PRIVATE
+#define CRYPT_PATH_MAGIC 0x70127012u
+
/* The private parts of crypt path that don't need to be exposed to all the
* modules. */
struct crypt_path_private_t {
diff --git a/src/feature/hs/hs_circuit.c b/src/feature/hs/hs_circuit.c
index a42228d36..3356db9d9 100644
--- a/src/feature/hs/hs_circuit.c
+++ b/src/feature/hs/hs_circuit.c
@@ -87,8 +87,7 @@ create_rend_cpath(const uint8_t *ntor_key_seed, size_t seed_len,
}
/* Setup the cpath */
- cpath = tor_malloc_zero(sizeof(crypt_path_t));
- cpath->magic = CRYPT_PATH_MAGIC;
+ cpath = crypt_path_new();
if (circuit_init_cpath_crypto(cpath, (char*)keys, sizeof(keys),
is_service_side, 1) < 0) {
diff --git a/src/feature/rend/rendclient.c b/src/feature/rend/rendclient.c
index f84d221b1..c6e9dde87 100644
--- a/src/feature/rend/rendclient.c
+++ b/src/feature/rend/rendclient.c
@@ -16,6 +16,7 @@
#include "core/or/circuituse.h"
#include "core/or/connection_edge.h"
#include "core/or/relay.h"
+#include "core/or/crypt_path.h"
#include "feature/client/circpathbias.h"
#include "feature/control/control_events.h"
#include "feature/dirclient/dirclient.h"
@@ -194,9 +195,7 @@ rend_client_send_introduction(origin_circuit_t *introcirc,
/* Initialize the pending_final_cpath and start the DH handshake. */
cpath = rendcirc->build_state->pending_final_cpath;
if (!cpath) {
- cpath = rendcirc->build_state->pending_final_cpath =
- tor_malloc_zero(sizeof(crypt_path_t));
- cpath->magic = CRYPT_PATH_MAGIC;
+ cpath = rendcirc->build_state->pending_final_cpath = crypt_path_new();
if (!(cpath->rend_dh_handshake_state = crypto_dh_new(DH_TYPE_REND))) {
log_warn(LD_BUG, "Internal error: couldn't allocate DH.");
status = -2;
diff --git a/src/feature/rend/rendservice.c b/src/feature/rend/rendservice.c
index 5c267f8e3..38da4cfe7 100644
--- a/src/feature/rend/rendservice.c
+++ b/src/feature/rend/rendservice.c
@@ -2158,8 +2158,7 @@ rend_service_receive_introduction(origin_circuit_t *circuit,
launched->build_state->service_pending_final_cpath_ref->refcount = 1;
launched->build_state->service_pending_final_cpath_ref->cpath = cpath =
- tor_malloc_zero(sizeof(crypt_path_t));
- cpath->magic = CRYPT_PATH_MAGIC;
+ crypt_path_new();
launched->build_state->expiry_time = now + MAX_REND_TIMEOUT;
cpath->rend_dh_handshake_state = dh;
diff --git a/src/test/test_circuitpadding.c b/src/test/test_circuitpadding.c
index 8a2667e80..6fa790c40 100644
--- a/src/test/test_circuitpadding.c
+++ b/src/test/test_circuitpadding.c
@@ -115,7 +115,7 @@ new_fake_orcirc(channel_t *nchan, channel_t *pchan)
{
or_circuit_t *orcirc = NULL;
circuit_t *circ = NULL;
- crypt_path_t tmp_cpath;
+ crypt_path_t *tmp_cpath;
char whatevs_key[CPATH_KEY_MATERIAL_LEN];
orcirc = tor_malloc_zero(sizeof(*orcirc));
@@ -144,13 +144,15 @@ new_fake_orcirc(channel_t *nchan, channel_t *pchan)
circuit_set_p_circid_chan(orcirc, orcirc->p_circ_id, pchan);
circuit_set_n_circid_chan(circ, circ->n_circ_id, nchan);
- memset(&tmp_cpath, 0, sizeof(tmp_cpath));
- if (circuit_init_cpath_crypto(&tmp_cpath, whatevs_key,
+ tmp_cpath = crypt_path_new();
+ if (circuit_init_cpath_crypto(tmp_cpath, whatevs_key,
sizeof(whatevs_key), 0, 0)<0) {
log_warn(LD_BUG,"Circuit initialization failed");
return NULL;
}
- orcirc->crypto = tmp_cpath.private->crypto;
+ orcirc->crypto = tmp_cpath->private->crypto;
+ tor_free(tmp_cpath->private);
+ tor_free(tmp_cpath);
return orcirc;
}
@@ -1618,10 +1620,9 @@ simulate_single_hop_extend(circuit_t *client, circuit_t *mid_relay,
circpad_cell_event_nonpadding_received((circuit_t*)client);
// Add a hop to cpath
- crypt_path_t *hop = tor_malloc_zero(sizeof(crypt_path_t));
+ crypt_path_t *hop = crypt_path_new();
onion_append_to_cpath(&TO_ORIGIN_CIRCUIT(client)->cpath, hop);
- hop->magic = CRYPT_PATH_MAGIC;
hop->state = CPATH_STATE_OPEN;
// add an extend info to indicate if this node supports padding or not.
diff --git a/src/test/test_hs_client.c b/src/test/test_hs_client.c
index 607be339a..9e1d73a85 100644
--- a/src/test/test_hs_client.c
+++ b/src/test/test_hs_client.c
@@ -39,6 +39,7 @@
#include "feature/hs/hs_cache.h"
#include "core/or/circuitlist.h"
#include "core/or/circuitbuild.h"
+#include "core/or/crypt_path.h"
#include "core/mainloop/connection.h"
#include "core/or/connection_edge.h"
#include "feature/nodelist/networkstatus.h"
@@ -145,9 +146,7 @@ helper_get_circ_and_stream_for_test(origin_circuit_t **circ_out,
if (is_legacy) {
/* Legacy: Setup rend data and final cpath */
- or_circ->build_state->pending_final_cpath =
- tor_malloc_zero(sizeof(crypt_path_t));
- or_circ->build_state->pending_final_cpath->magic = CRYPT_PATH_MAGIC;
+ or_circ->build_state->pending_final_cpath = crypt_path_new();
or_circ->build_state->pending_final_cpath->rend_dh_handshake_state =
crypto_dh_new(DH_TYPE_REND);
tt_assert(
diff --git a/src/test/test_hs_service.c b/src/test/test_hs_service.c
index bfa66f551..357db8904 100644
--- a/src/test/test_hs_service.c
+++ b/src/test/test_hs_service.c
@@ -38,6 +38,7 @@
#include "core/or/circuitbuild.h"
#include "core/or/circuitlist.h"
#include "core/or/circuituse.h"
+#include "core/or/crypt_path.h"
#include "core/or/connection_edge.h"
#include "core/or/edge_connection_st.h"
#include "core/or/relay.h"
@@ -218,8 +219,7 @@ helper_create_origin_circuit(int purpose, int flags)
circ = origin_circuit_init(purpose, flags);
tor_assert(circ);
- circ->cpath = tor_malloc_zero(sizeof(crypt_path_t));
- circ->cpath->magic = CRYPT_PATH_MAGIC;
+ circ->cpath = crypt_path_new();
circ->cpath->state = CPATH_STATE_OPEN;
circ->cpath->package_window = circuit_initial_package_window();
circ->cpath->deliver_window = CIRCWINDOW_START;
diff --git a/src/test/test_relaycell.c b/src/test/test_relaycell.c
index 062358351..b48c7ca8a 100644
--- a/src/test/test_relaycell.c
+++ b/src/test/test_relaycell.c
@@ -16,6 +16,7 @@
#include "lib/crypt_ops/crypto_rand.h"
#include "core/or/circuitbuild.h"
#include "core/or/circuitlist.h"
+#include "core/or/crypt_path.h"
#include "core/or/connection_edge.h"
#include "core/or/relay.h"
#include "test/test.h"
@@ -90,8 +91,7 @@ helper_create_origin_circuit(int purpose, int flags)
circ = origin_circuit_init(purpose, flags);
tor_assert(circ);
- circ->cpath = tor_malloc_zero(sizeof(crypt_path_t));
- circ->cpath->magic = CRYPT_PATH_MAGIC;
+ circ->cpath = crypt_path_new();
circ->cpath->state = CPATH_STATE_OPEN;
circ->cpath->package_window = circuit_initial_package_window();
circ->cpath->deliver_window = CIRCWINDOW_START;
diff --git a/src/test/test_relaycrypt.c b/src/test/test_relaycrypt.c
index b94ee07ab..1fe5df96e 100644
--- a/src/test/test_relaycrypt.c
+++ b/src/test/test_relaycrypt.c
@@ -50,7 +50,7 @@ testing_circuitset_setup(const struct testcase_t *testcase)
cs->origin_circ = origin_circuit_new();
cs->origin_circ->base_.purpose = CIRCUIT_PURPOSE_C_GENERAL;
for (i=0; i<3; ++i) {
- crypt_path_t *hop = tor_malloc_zero(sizeof(*hop));
+ crypt_path_t *hop = crypt_path_new();
relay_crypto_init(&hop->private->crypto, KEY_MATERIAL[i], sizeof(KEY_MATERIAL[i]),
0, 0);
hop->state = CPATH_STATE_OPEN;
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