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Massive refactoring of the various handshake types

Browse Source 
The three handshake types are now accessed from a unified interface;
their state is abstracted from the rest of the cpath state, and so on.
This commit is contained in:
Nick Mathewson 2012-12-04 21:27:07 -05:00
parent 5fa1c7484c
commit f58d4dfcd6
17 changed files with 463 additions and 136 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

124
src/or/circuitbuild.c
View File

@ -27,6 +27,7 @@
#include "main.h"
#include "networkstatus.h"
#include "nodelist.h"
#include "onion.h"
#include "onion_tap.h"
#include "onion_fast.h"
#include "policies.h"
@ -54,7 +55,9 @@ static channel_t * channel_connect_for_circuit(const tor_addr_t *addr,
uint16_t port,
const char *id_digest);
static int circuit_deliver_create_cell(circuit_t *circ,
uint8_t cell_type, const char *payload);
uint8_t cell_type,
const uint8_t *payload,
size_t payload_len);
static int onion_pick_cpath_exit(origin_circuit_t *circ, extend_info_t *exit);
static crypt_path_t *onion_next_hop_in_cpath(crypt_path_t *cpath);
static int onion_extend_cpath(origin_circuit_t *circ);
@ -474,7 +477,8 @@ circuit_n_chan_done(channel_t *chan, int status)
/* pull the create cell out of circ->onionskin, and send it */
tor_assert(circ->n_chan_onionskin);
if (circuit_deliver_create_cell(circ,CELL_CREATE,
circ->n_chan_onionskin)<0) {
(const uint8_t*)circ->n_chan_onionskin,
circ->n_chan_onionskin_len)<0) {
circuit_mark_for_close(circ, END_CIRC_REASON_RESOURCELIMIT);
continue;
}
@ -491,12 +495,12 @@ circuit_n_chan_done(channel_t *chan, int status)
* for the outgoing
* circuit <b>circ</b>, and deliver a cell of type <b>cell_type</b>
* (either CELL_CREATE or CELL_CREATE_FAST) with payload <b>payload</b>
* to this circuit.
* to this circuit. DOCDOC payload_len
* Return -1 if we failed to find a suitable circid, else return 0.
*/
static int
circuit_deliver_create_cell(circuit_t *circ, uint8_t cell_type,
const char *payload)
const uint8_t *payload, size_t payload_len)
{
cell_t cell;
circid_t id;
@ -518,7 +522,7 @@ circuit_deliver_create_cell(circuit_t *circ, uint8_t cell_type,
cell.command = cell_type;
cell.circ_id = circ->n_circ_id;
memcpy(cell.payload, payload, ONIONSKIN_CHALLENGE_LEN);
memcpy(cell.payload, payload, payload_len);
append_cell_to_circuit_queue(circ, circ->n_chan, &cell,
CELL_DIRECTION_OUT, 0);
@ -611,8 +615,10 @@ circuit_send_next_onion_skin(origin_circuit_t *circ)
{
crypt_path_t *hop;
const node_t *node;
char payload[2+4+DIGEST_LEN+ONIONSKIN_CHALLENGE_LEN];
char *onionskin;
uint8_t payload[2+4+DIGEST_LEN+MAX_ONIONSKIN_CHALLENGE_LEN];
uint8_t *onionskin;
uint16_t handshake_type;
int onionskin_len;
size_t payload_len;
tor_assert(circ);
@ -633,30 +639,29 @@ circuit_send_next_onion_skin(origin_circuit_t *circ)
* send an old slow create cell.
*/
cell_type = CELL_CREATE;
if (onion_skin_create(circ->cpath->extend_info->onion_key,
&(circ->cpath->dh_handshake_state),
payload) < 0) {
log_warn(LD_CIRC,"onion_skin_create (first hop) failed.");
return - END_CIRC_REASON_INTERNAL;
}
handshake_type = ONION_HANDSHAKE_TYPE_TAP;
note_request("cell: create", 1);
} else {
/* We are not an OR, and we're building the first hop of a circuit to a
* new OR: we can be speedy and use CREATE_FAST to save an RSA operation
* and a DH operation. */
cell_type = CELL_CREATE_FAST;
memset(payload, 0, sizeof(payload));
if (fast_onionskin_create(&circ->cpath->fast_handshake_state,
(uint8_t *)payload) < 0) {
log_warn(LD_CIRC,"onion_skin_create FAST (first hop) failed.");
return - END_CIRC_REASON_INTERNAL;
}
handshake_type = ONION_HANDSHAKE_TYPE_FAST;
note_request("cell: create fast", 1);
}
if (circuit_deliver_create_cell(TO_CIRCUIT(circ), cell_type, payload) < 0)
memset(payload, 0, sizeof(payload));
onionskin_len = onion_skin_create(handshake_type,
circ->cpath->extend_info,
&circ->cpath->handshake_state,
payload);
if (onionskin_len < 0) {
log_warn(LD_CIRC,"onion_skin_create (first hop) failed.");
return - END_CIRC_REASON_INTERNAL;
}
if (circuit_deliver_create_cell(TO_CIRCUIT(circ), cell_type, payload,
onionskin_len) < 0)
return - END_CIRC_REASON_RESOURCELIMIT;
circ->cpath->state = CPATH_STATE_AWAITING_KEYS;
@ -742,12 +747,16 @@ circuit_send_next_onion_skin(origin_circuit_t *circ)
set_uint16(payload+4, htons(hop->extend_info->port));
onionskin = payload+2+4;
memcpy(payload+2+4+ONIONSKIN_CHALLENGE_LEN,
memcpy(payload+2+4+TAP_ONIONSKIN_CHALLENGE_LEN,
hop->extend_info->identity_digest, DIGEST_LEN);
payload_len = 2+4+ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN;
payload_len = 2+4+TAP_ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN;
if (onion_skin_create(hop->extend_info->onion_key,
&(hop->dh_handshake_state), onionskin) < 0) {
handshake_type = ONION_HANDSHAKE_TYPE_TAP;
if (onion_skin_create(handshake_type,
hop->extend_info,
&hop->handshake_state,
onionskin) < 0) {
log_warn(LD_CIRC,"onion_skin_create failed.");
return - END_CIRC_REASON_INTERNAL;
}
@ -758,7 +767,8 @@ circuit_send_next_onion_skin(origin_circuit_t *circ)
* it to a create cell and then send to hop */
if (relay_send_command_from_edge(0, TO_CIRCUIT(circ),
RELAY_COMMAND_EXTEND,
payload, payload_len, hop->prev) < 0)
(char*)payload, payload_len,
hop->prev) < 0)
return 0; /* circuit is closed */
hop->state = CPATH_STATE_AWAITING_KEYS;
@ -826,7 +836,7 @@ circuit_extend(cell_t *cell, circuit_t *circ)
relay_header_unpack(&rh, cell->payload);
if (rh.length < 4+2+ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN) {
if (rh.length < 4+2+TAP_ONIONSKIN_CHALLENGE_LEN+DIGEST_LEN) {
log_fn(LOG_PROTOCOL_WARN, LD_PROTOCOL,
"Wrong length %d on extend cell. Closing circuit.",
rh.length);
@ -837,7 +847,7 @@ circuit_extend(cell_t *cell, circuit_t *circ)
n_port = ntohs(get_uint16(cell->payload+RELAY_HEADER_SIZE+4));
onionskin = (char*) cell->payload+RELAY_HEADER_SIZE+4+2;
id_digest = (char*) cell->payload+RELAY_HEADER_SIZE+4+2+
ONIONSKIN_CHALLENGE_LEN;
TAP_ONIONSKIN_CHALLENGE_LEN;
tor_addr_from_ipv4h(&n_addr, n_addr32);
if (!n_port || !n_addr32) {
@ -890,8 +900,10 @@ circuit_extend(cell_t *cell, circuit_t *circ)
NULL /*onion_key*/,
&n_addr, n_port);
circ->n_chan_onionskin = tor_malloc(ONIONSKIN_CHALLENGE_LEN);
memcpy(circ->n_chan_onionskin, onionskin, ONIONSKIN_CHALLENGE_LEN);
circ->n_chan_onionskin = tor_malloc(TAP_ONIONSKIN_CHALLENGE_LEN);
memcpy(circ->n_chan_onionskin, onionskin, TAP_ONIONSKIN_CHALLENGE_LEN);
circ->n_chan_onionskin_len = TAP_ONIONSKIN_CHALLENGE_LEN;
circuit_set_state(circ, CIRCUIT_STATE_CHAN_WAIT);
if (should_launch) {
@ -917,7 +929,8 @@ circuit_extend(cell_t *cell, circuit_t *circ)
"n_chan is %s",
channel_get_canonical_remote_descr(n_chan));
if (circuit_deliver_create_cell(circ, CELL_CREATE, onionskin) < 0)
if (circuit_deliver_create_cell(circ, CELL_CREATE, (uint8_t*)onionskin,
TAP_ONIONSKIN_CHALLENGE_LEN) < 0)
return -1;
return 0;
}
@ -1377,31 +1390,32 @@ circuit_finish_handshake(origin_circuit_t *circ, uint8_t reply_type,
}
tor_assert(hop->state == CPATH_STATE_AWAITING_KEYS);
if (reply_type == CELL_CREATED && hop->dh_handshake_state) {
if (onion_skin_client_handshake(hop->dh_handshake_state, (char*)reply,keys,
DIGEST_LEN*2+CIPHER_KEY_LEN*2) < 0) {
{
uint16_t handshake_type = 0xffff;
if (reply_type == CELL_CREATED)
handshake_type = ONION_HANDSHAKE_TYPE_TAP;
else if (reply_type == CELL_CREATED_FAST)
handshake_type = ONION_HANDSHAKE_TYPE_FAST;
if (handshake_type != hop->handshake_state.tag) {
log_warn(LD_PROTOCOL,"CREATED cell onionskin type (%u) did not "
"match CREATE cell onionskin type (%u).",
(unsigned)handshake_type,
(unsigned) hop->handshake_state.tag);
return -END_CIRC_REASON_TORPROTOCOL;
}
if (onion_skin_client_handshake(handshake_type,
&hop->handshake_state,
reply,
(uint8_t*)keys, sizeof(keys),
(uint8_t*)hop->handshake_digest) < 0) {
log_warn(LD_CIRC,"onion_skin_client_handshake failed.");
return -END_CIRC_REASON_TORPROTOCOL;
}
/* Remember hash of g^xy */
memcpy(hop->handshake_digest, reply+DH_KEY_LEN, DIGEST_LEN);
} else if (reply_type == CELL_CREATED_FAST && !hop->dh_handshake_state) {
if (fast_client_handshake(hop->fast_handshake_state, reply,
(uint8_t*)keys,
DIGEST_LEN*2+CIPHER_KEY_LEN*2) < 0) {
log_warn(LD_CIRC,"fast_client_handshake failed.");
return -END_CIRC_REASON_TORPROTOCOL;
}
memcpy(hop->handshake_digest, reply+DIGEST_LEN, DIGEST_LEN);
} else {
log_warn(LD_PROTOCOL,"CREATED cell type did not match CREATE cell type.");
return -END_CIRC_REASON_TORPROTOCOL;
}
crypto_dh_free(hop->dh_handshake_state); /* don't need it anymore */
hop->dh_handshake_state = NULL;
memset(hop->fast_handshake_state, 0, sizeof(hop->fast_handshake_state));
onion_handshake_state_release(&hop->handshake_state);
if (circuit_init_cpath_crypto(hop, keys, 0)<0) {
return -END_CIRC_REASON_TORPROTOCOL;
@ -1470,7 +1484,7 @@ circuit_truncated(origin_circuit_t *circ, crypt_path_t *layer, int reason)
*/
int
onionskin_answer(or_circuit_t *circ, uint8_t cell_type, const char *payload,
const char *keys)
size_t payload_len, const char *keys)
{
cell_t cell;
crypt_path_t *tmp_cpath;
@ -1484,8 +1498,7 @@ onionskin_answer(or_circuit_t *circ, uint8_t cell_type, const char *payload,
circuit_set_state(TO_CIRCUIT(circ), CIRCUIT_STATE_OPEN);
memcpy(cell.payload, payload,
cell_type == CELL_CREATED ? ONIONSKIN_REPLY_LEN : DIGEST_LEN*2);
memcpy(cell.payload, payload, payload_len);
log_debug(LD_CIRC,"init digest forward 0x%.8x, backward 0x%.8x.",
(unsigned int)get_uint32(keys),
@ -1502,6 +1515,7 @@ onionskin_answer(or_circuit_t *circ, uint8_t cell_type, const char *payload,
tmp_cpath->magic = 0;
tor_free(tmp_cpath);
/* XXXX Move responsibility for extracting this. */
if (cell_type == CELL_CREATED)
memcpy(circ->handshake_digest, cell.payload+DH_KEY_LEN, DIGEST_LEN);
else

3
src/or/circuitbuild.h
View File

@ -35,7 +35,8 @@ int circuit_finish_handshake(origin_circuit_t *circ, uint8_t cell_type,
int circuit_truncated(origin_circuit_t *circ, crypt_path_t *layer,
int reason);
int onionskin_answer(or_circuit_t *circ, uint8_t cell_type,
const char *payload, const char *keys);
const char *payload, size_t payload_len,
const char *keys);
int circuit_all_predicted_ports_handled(time_t now, int *need_uptime,
int *need_capacity);

7
src/or/circuitlist.c
View File

@ -744,8 +744,8 @@ circuit_free_cpath_node(crypt_path_t *victim)
crypto_cipher_free(victim->b_crypto);
crypto_digest_free(victim->f_digest);
crypto_digest_free(victim->b_digest);
crypto_dh_free(victim->dh_handshake_state);
fast_handshake_state_free(victim->fast_handshake_state);
onion_handshake_state_release(&victim->handshake_state);
crypto_dh_free(victim->rend_dh_handshake_state);
extend_info_free(victim->extend_info);
memwipe(victim, 0xBB, sizeof(crypt_path_t)); /* poison memory */
@ -1494,7 +1494,8 @@ assert_cpath_layer_ok(const crypt_path_t *cp)
tor_assert(cp->b_crypto);
/* fall through */
case CPATH_STATE_CLOSED:
tor_assert(!cp->dh_handshake_state);
/*XXXX Assert that there's no handshake_state either. */
tor_assert(!cp->rend_dh_handshake_state);
break;
case CPATH_STATE_AWAITING_KEYS:
/* tor_assert(cp->dh_handshake_state); */

10
src/or/command.c
View File

@ -30,6 +30,7 @@
#include "hibernate.h"
#include "nodelist.h"
//#include "onion.h"
#include "onion_tap.h"
#include "onion_fast.h"
#include "relay.h"
#include "router.h"
@ -254,8 +255,8 @@ command_process_create_cell(cell_t *cell, channel_t *chan)
circ->base_.purpose = CIRCUIT_PURPOSE_OR;
circuit_set_state(TO_CIRCUIT(circ), CIRCUIT_STATE_ONIONSKIN_PENDING);
if (cell->command == CELL_CREATE) {
char *onionskin = tor_malloc(ONIONSKIN_CHALLENGE_LEN);
memcpy(onionskin, cell->payload, ONIONSKIN_CHALLENGE_LEN);
char *onionskin = tor_malloc(TAP_ONIONSKIN_CHALLENGE_LEN);
memcpy(onionskin, cell->payload, TAP_ONIONSKIN_CHALLENGE_LEN);
/* hand it off to the cpuworkers, and then return. */
if (assign_onionskin_to_cpuworker(NULL, circ, onionskin) < 0) {
@ -282,7 +283,8 @@ command_process_create_cell(cell_t *cell, channel_t *chan)
circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_INTERNAL);
return;
}
if (onionskin_answer(circ, CELL_CREATED_FAST, reply, keys)<0) {
if (onionskin_answer(circ, CELL_CREATED_FAST, reply, sizeof(reply),
keys)<0) {
log_warn(LD_OR,"Failed to reply to CREATE_FAST cell. Closing.");
circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_INTERNAL);
return;
@ -340,7 +342,7 @@ command_process_created_cell(cell_t *cell, channel_t *chan)
log_debug(LD_OR,
"Converting created cell to extended relay cell, sending.");
relay_send_command_from_edge(0, circ, RELAY_COMMAND_EXTENDED,
(char*)cell->payload, ONIONSKIN_REPLY_LEN,
(char*)cell->payload, TAP_ONIONSKIN_REPLY_LEN,
NULL);
}
}

40
src/or/cpuworker.c
View File

@ -35,7 +35,7 @@
#define TAG_LEN 10
/** How many bytes are sent from the cpuworker back to tor? */
#define LEN_ONION_RESPONSE \
(1+TAG_LEN+ONIONSKIN_REPLY_LEN+CPATH_KEY_MATERIAL_LEN)
(1+TAG_LEN+TAP_ONIONSKIN_REPLY_LEN+CPATH_KEY_MATERIAL_LEN)
/** How many cpuworkers we have running right now. */
static int num_cpuworkers=0;
@ -185,7 +185,8 @@ connection_cpu_process_inbuf(connection_t *conn)
}
tor_assert(! CIRCUIT_IS_ORIGIN(circ));
if (onionskin_answer(TO_OR_CIRCUIT(circ), CELL_CREATED, buf+TAG_LEN,
buf+TAG_LEN+ONIONSKIN_REPLY_LEN) < 0) {
TAP_ONIONSKIN_REPLY_LEN,
buf+TAG_LEN+TAP_ONIONSKIN_REPLY_LEN) < 0) {
log_warn(LD_OR,"onionskin_answer failed. Closing.");
circuit_mark_for_close(circ, END_CIRC_REASON_INTERNAL);
goto done_processing;
@ -214,11 +215,11 @@ connection_cpu_process_inbuf(connection_t *conn)
* Request format:
* Task type [1 byte, always CPUWORKER_TASK_ONION]
* Opaque tag TAG_LEN
* Onionskin challenge ONIONSKIN_CHALLENGE_LEN
* Onionskin challenge TAP_ONIONSKIN_CHALLENGE_LEN
* Response format:
* Success/failure [1 byte, boolean.]
* Opaque tag TAG_LEN
* Onionskin challenge ONIONSKIN_REPLY_LEN
* Onionskin challenge TAP_ONIONSKIN_REPLY_LEN
* Negotiated keys KEY_LEN*2+DIGEST_LEN*2
*
* (Note: this _should_ be by addr/port, since we're concerned with specific
@ -227,17 +228,17 @@ connection_cpu_process_inbuf(connection_t *conn)
static void
cpuworker_main(void *data)
{
char question[ONIONSKIN_CHALLENGE_LEN];
char question[TAP_ONIONSKIN_CHALLENGE_LEN];
uint8_t question_type;
tor_socket_t *fdarray = data;
tor_socket_t fd;
/* variables for onion processing */
char keys[CPATH_KEY_MATERIAL_LEN];
char reply_to_proxy[ONIONSKIN_REPLY_LEN];
char reply_to_proxy[MAX_ONIONSKIN_REPLY_LEN];
char buf[LEN_ONION_RESPONSE];
char tag[TAG_LEN];
crypto_pk_t *onion_key = NULL, *last_onion_key = NULL;
server_onion_keys_t onion_keys;
fd = fdarray[1]; /* this side is ours */
#ifndef TOR_IS_MULTITHREADED
@ -248,7 +249,7 @@ cpuworker_main(void *data)
#endif
tor_free(data);
dup_onion_keys(&onion_key, &last_onion_key);
setup_server_onion_keys(&onion_keys);
for (;;) {
ssize_t r;
@ -275,15 +276,18 @@ cpuworker_main(void *data)
goto end;
}
if (read_all(fd, question, ONIONSKIN_CHALLENGE_LEN, 1) !=
ONIONSKIN_CHALLENGE_LEN) {
if (read_all(fd, question, TAP_ONIONSKIN_CHALLENGE_LEN, 1) !=
TAP_ONIONSKIN_CHALLENGE_LEN) {
log_err(LD_BUG,"read question failed. Exiting.");
goto end;
}
if (question_type == CPUWORKER_TASK_ONION) {
if (onion_skin_server_handshake(question, onion_key, last_onion_key,
reply_to_proxy, keys, CPATH_KEY_MATERIAL_LEN) < 0) {
if (onion_skin_server_handshake(ONION_HANDSHAKE_TYPE_TAP,
(const uint8_t*)question,
&onion_keys,
(uint8_t*)reply_to_proxy,
(uint8_t*)keys, CPATH_KEY_MATERIAL_LEN) < 0) {
/* failure */
log_debug(LD_OR,"onion_skin_server_handshake failed.");
*buf = 0; /* indicate failure in first byte */
@ -295,8 +299,9 @@ cpuworker_main(void *data)
log_debug(LD_OR,"onion_skin_server_handshake succeeded.");
buf[0] = 1; /* 1 means success */
memcpy(buf+1,tag,TAG_LEN);
memcpy(buf+1+TAG_LEN,reply_to_proxy,ONIONSKIN_REPLY_LEN);
memcpy(buf+1+TAG_LEN+ONIONSKIN_REPLY_LEN,keys,CPATH_KEY_MATERIAL_LEN);
memcpy(buf+1+TAG_LEN,reply_to_proxy,TAP_ONIONSKIN_REPLY_LEN);
memcpy(buf+1+TAG_LEN+TAP_ONIONSKIN_REPLY_LEN,keys,
CPATH_KEY_MATERIAL_LEN);
}
if (write_all(fd, buf, LEN_ONION_RESPONSE, 1) != LEN_ONION_RESPONSE) {
log_err(LD_BUG,"writing response buf failed. Exiting.");
@ -306,10 +311,7 @@ cpuworker_main(void *data)
}
}
end:
if (onion_key)
crypto_pk_free(onion_key);
if (last_onion_key)
crypto_pk_free(last_onion_key);
release_server_onion_keys(&onion_keys);
tor_close_socket(fd);
crypto_thread_cleanup();
spawn_exit();
@ -497,7 +499,7 @@ assign_onionskin_to_cpuworker(connection_t *cpuworker,
qbuf[0] = CPUWORKER_TASK_ONION;
connection_write_to_buf(qbuf, 1, cpuworker);
connection_write_to_buf(tag, sizeof(tag), cpuworker);
connection_write_to_buf(onionskin, ONIONSKIN_CHALLENGE_LEN, cpuworker);
connection_write_to_buf(onionskin, TAP_ONIONSKIN_CHALLENGE_LEN, cpuworker);
tor_free(onionskin);
}
return 0;

243
src/or/onion.c
View File

@ -6,15 +6,19 @@
/**
* \file onion.c
* \brief Functions to queue create cells, and handle onionskin
* parsing and creation.
* \brief Functions to queue create cells, handle onionskin
* parsing and creation, and wrap the various onionskin types.
**/
#include "or.h"
#include "circuitlist.h"
#include "config.h"
#include "onion.h"
#include "onion_fast.h"
#include "onion_ntor.h"
#include "onion_tap.h"
#include "rephist.h"
#include "router.h"
/** Type for a linked list of circuits that are waiting for a free CPU worker
* to process a waiting onion handshake. */
@ -37,6 +41,8 @@ static onion_queue_t *ol_tail=NULL;
/** Length of ol_list */
static int ol_length=0;
/* XXXX Check lengths vs MAX_ONIONSKIN_{CHALLENGE,REPLY}_LEN */
/** Add <b>circ</b> to the end of ol_list and return 0, except
* if ol_list is too long, in which case do nothing and return -1.
*/
@ -171,3 +177,236 @@ clear_pending_onions(void)
ol_length = 0;
}
/* ============================================================ */
/** Fill in a server_onion_keys_t object at <b>keys</b> with all of the keys
* and other info we might need to do onion handshakes. (We make a copy of
* our keys for each cpuworker to avoid race conditions with the main thread,
* and to avoid locking) */
void
setup_server_onion_keys(server_onion_keys_t *keys)
{
memset(keys, 0, sizeof(server_onion_keys_t));
memcpy(keys->my_identity, router_get_my_id_digest(), DIGEST_LEN);
dup_onion_keys(&keys->onion_key, &keys->last_onion_key);
#ifdef CURVE25519_ENABLED
keys->curve25519_key_map = construct_ntor_key_map();
#endif
}
/** Release all storage held in <b>keys</b>, but do not free <b>keys</b>
* itself (as it's likely to be stack-allocated.) */
void
release_server_onion_keys(server_onion_keys_t *keys)
{
if (! keys)
return;
crypto_pk_free(keys->onion_key);
crypto_pk_free(keys->last_onion_key);
#ifdef CURVE25519_ENABLED
ntor_key_map_free(keys->curve25519_key_map);
#endif
memset(keys, 0, sizeof(server_onion_keys_t));
}
/** Release whatever storage is held in <b>state</b>, depending on its
* type, and clear its pointer. */
void
onion_handshake_state_release(onion_handshake_state_t *state)
{
switch (state->tag) {
case ONION_HANDSHAKE_TYPE_TAP:
crypto_dh_free(state->u.tap);
state->u.tap = NULL;
break;
case ONION_HANDSHAKE_TYPE_FAST:
fast_handshake_state_free(state->u.fast);
state->u.fast = NULL;
break;
#ifdef CURVE25519_ENABLED
case ONION_HANDSHAKE_TYPE_NTOR:
ntor_handshake_state_free(state->u.ntor);
state->u.ntor = NULL;
break;
#endif
default:
log_warn(LD_BUG, "called with unknown handshake state type %d",
(int)state->tag);
tor_fragile_assert();
}
}
/** Perform the first step of a circuit-creation handshake of type <b>type</b>
* (one of ONION_HANDSHAKE_TYPE_*): generate the initial "onion skin" in
* <b>onion_skin_out</b>, and store any state information in <b>state_out</b>.
* Return -1 on failure, and the length of the onionskin on acceptance.
*/
int
onion_skin_create(int type,
const extend_info_t *node,
onion_handshake_state_t *state_out,
uint8_t *onion_skin_out)
{
int r = -1;
switch (type) {
case ONION_HANDSHAKE_TYPE_TAP:
if (!node->onion_key)
return -1;
if (onion_skin_TAP_create(node->onion_key,
&state_out->u.tap,
(char*)onion_skin_out) < 0)
return -1;
r = TAP_ONIONSKIN_CHALLENGE_LEN;
break;
case ONION_HANDSHAKE_TYPE_FAST:
if (fast_onionskin_create(&state_out->u.fast, onion_skin_out) < 0)
return -1;
r = CREATE_FAST_LEN;
break;
case ONION_HANDSHAKE_TYPE_NTOR:
#ifdef CURVE25519_ENABLED
if (tor_mem_is_zero((const char*)node->curve25519_onion_key.public_key,
CURVE25519_PUBKEY_LEN))
return -1;
if (onion_skin_ntor_create((const uint8_t*)node->identity_digest,
&node->curve25519_onion_key,
&state_out->u.ntor,
onion_skin_out) < 0)
return -1;
r = NTOR_ONIONSKIN_LEN;
#else
return -1;
#endif
break;
default:
log_warn(LD_BUG, "called with unknown handshake state type %d", type);
tor_fragile_assert();
r = -1;
}
if (r > 0)
state_out->tag = (uint16_t) type;
return r;
}
/** Perform the second (server-side) step of a circuit-creation handshake of
* type <b>type</b>, responding to the client request in <b>onion_skin</b>
* using the keys in <b>keys</b>. On success, write our response into
* <b>reply_out</b>, generate <b>keys_out_len</b> bytes worth of key material
* in <b>keys_out_len</b>, and return the length of the reply. On failure,
* return -1. */
int
onion_skin_server_handshake(int type,
const uint8_t *onion_skin,
const server_onion_keys_t *keys,
uint8_t *reply_out,
uint8_t *keys_out, size_t keys_out_len)
{
int r = -1;
switch (type) {
case ONION_HANDSHAKE_TYPE_TAP:
if (onion_skin_TAP_server_handshake((const char*)onion_skin,
keys->onion_key, keys->last_onion_key,
(char*)reply_out,
(char*)keys_out, keys_out_len)<0)
return -1;
r = TAP_ONIONSKIN_REPLY_LEN;
break;
case ONION_HANDSHAKE_TYPE_FAST:
if (fast_server_handshake(onion_skin, reply_out, keys_out, keys_out_len)<0)
return -1;
r = CREATED_FAST_LEN;
break;
case ONION_HANDSHAKE_TYPE_NTOR:
#ifdef CURVE25519_ENABLED
if (onion_skin_ntor_server_handshake(onion_skin, keys->curve25519_key_map,
keys->my_identity,
reply_out, keys_out, keys_out_len)<0)
return -1;
r = NTOR_REPLY_LEN;
#else
return -1;
#endif
break;
default:
log_warn(LD_BUG, "called with unknown handshake state type %d", type);
tor_fragile_assert();
return -1;
}
/* XXXX we should generate the rendezvous nonce stuff too. Some notes
* below */
// memcpy(hop->handshake_digest, reply+DH_KEY_LEN, DIGEST_LEN);
//memcpy(hop->handshake_digest, reply+DIGEST_LEN, DIGEST_LEN);
return r;
}
/** Perform the final (client-side) step of a circuit-creation handshake of
* type <b>type</b>, using our state in <b>handshake_state</b> and the
* server's response in <b>reply</b> On success, generate <b>keys_out_len</b>
* bytes worth of key material in <b>keys_out_len</b>, set
* <b>rend_authenticator_out</b> to the "KH" field that can be used to
* establish introduction points at this hop, and return 0. On failure,
* return -1. */
int
onion_skin_client_handshake(int type,
const onion_handshake_state_t *handshake_state,
const uint8_t *reply,
uint8_t *keys_out, size_t keys_out_len,
uint8_t *rend_authenticator_out)
{
if (handshake_state->tag != type)
return -1;
switch (type) {
case ONION_HANDSHAKE_TYPE_TAP:
if (onion_skin_TAP_client_handshake(handshake_state->u.tap,
(const char*)reply,
(char *)keys_out, keys_out_len) < 0)
return -1;
memcpy(rend_authenticator_out, reply+DH_KEY_LEN, DIGEST_LEN);
return 0;
case ONION_HANDSHAKE_TYPE_FAST:
if (fast_client_handshake(handshake_state->u.fast, reply,
keys_out, keys_out_len) < 0)
return -1;
memcpy(rend_authenticator_out, reply+DIGEST_LEN, DIGEST_LEN);
return 0;
#ifdef CURVE25519_ENABLED
case ONION_HANDSHAKE_TYPE_NTOR:
{
size_t keys_tmp_len = keys_out_len + DIGEST_LEN;
uint8_t *keys_tmp = tor_malloc(keys_tmp_len);
if (onion_skin_ntor_client_handshake(handshake_state->u.ntor,
reply,
keys_tmp, keys_tmp_len) < 0) {
tor_free(keys_tmp);
return -1;
}
memcpy(keys_out, keys_tmp, keys_out_len);
memcpy(rend_authenticator_out, keys_tmp + keys_out_len, DIGEST_LEN);
memwipe(keys_tmp, 0, keys_tmp_len);
tor_free(keys_tmp);
}
return 0;
#endif
default:
log_warn(LD_BUG, "called with unknown handshake state type %d", type);
tor_fragile_assert();
return -1;
}
}

33
src/or/onion.h
View File

@ -17,5 +17,38 @@ or_circuit_t *onion_next_task(char **onionskin_out);
void onion_pending_remove(or_circuit_t *circ);
void clear_pending_onions(void);
typedef struct server_onion_keys_t {
uint8_t my_identity[DIGEST_LEN];
crypto_pk_t *onion_key;
crypto_pk_t *last_onion_key;
#ifdef CURVE25519_ENABLED
di_digest256_map_t *curve25519_key_map;
#endif
} server_onion_keys_t;
#define MAX_ONIONSKIN_CHALLENGE_LEN 255
#define MAX_ONIONSKIN_REPLY_LEN 255
void setup_server_onion_keys(server_onion_keys_t *keys);
void release_server_onion_keys(server_onion_keys_t *keys);
void onion_handshake_state_release(onion_handshake_state_t *state);
int onion_skin_create(int type,
const extend_info_t *node,
onion_handshake_state_t *state_out,
uint8_t *onion_skin_out);
int onion_skin_server_handshake(int type,
const uint8_t *onion_skin,
const server_onion_keys_t *keys,
uint8_t *reply_out,
uint8_t *keys_out, size_t key_out_len);
// uint8_t *rend_authenticator_out);
int onion_skin_client_handshake(int type,
const onion_handshake_state_t *handshake_state,
const uint8_t *reply,
uint8_t *keys_out, size_t key_out_len,
uint8_t *rend_authenticator_out);
#endif

2
src/or/onion_ntor.h
View File

@ -17,6 +17,7 @@ typedef struct ntor_handshake_state_t ntor_handshake_state_t;
/** Length of an ntor reply, as sent from server to client. */
#define NTOR_REPLY_LEN 64
#ifdef CURVE25519_ENABLED
void ntor_handshake_state_free(ntor_handshake_state_t *state);
int onion_skin_ntor_create(const uint8_t *router_id,
@ -36,6 +37,7 @@ int onion_skin_ntor_client_handshake(
const uint8_t *handshake_reply,
uint8_t *key_out,
size_t key_out_len);
#endif
#endif

26
src/or/onion_tap.c
View File

@ -35,9 +35,9 @@
* The meeting point/cookies and auth are zeroed out for now.
*/
int
onion_skin_create(crypto_pk_t *dest_router_key,
onion_skin_TAP_create(crypto_pk_t *dest_router_key,
crypto_dh_t **handshake_state_out,
char *onion_skin_out) /* ONIONSKIN_CHALLENGE_LEN bytes */
char *onion_skin_out) /* TAP_ONIONSKIN_CHALLENGE_LEN bytes */
{
char challenge[DH_KEY_LEN];
crypto_dh_t *dh = NULL;
@ -47,7 +47,7 @@ onion_skin_create(crypto_pk_t *dest_router_key,
tor_assert(handshake_state_out);
tor_assert(onion_skin_out);
*handshake_state_out = NULL;
memset(onion_skin_out, 0, ONIONSKIN_CHALLENGE_LEN);
memset(onion_skin_out, 0, TAP_ONIONSKIN_CHALLENGE_LEN);
if (!(dh = crypto_dh_new(DH_TYPE_CIRCUIT)))
goto err;
@ -64,7 +64,7 @@ onion_skin_create(crypto_pk_t *dest_router_key,
/* set meeting point, meeting cookie, etc here. Leave zero for now. */
if (crypto_pk_public_hybrid_encrypt(dest_router_key, onion_skin_out,
ONIONSKIN_CHALLENGE_LEN,
TAP_ONIONSKIN_CHALLENGE_LEN,
challenge, DH_KEY_LEN,
PK_PKCS1_OAEP_PADDING, 1)<0)
goto err;
@ -85,14 +85,17 @@ onion_skin_create(crypto_pk_t *dest_router_key,
* next key_out_len bytes of key material in key_out.
*/
int
onion_skin_server_handshake(const char *onion_skin, /*ONIONSKIN_CHALLENGE_LEN*/
onion_skin_TAP_server_handshake(
/*TAP_ONIONSKIN_CHALLENGE_LEN*/
const char *onion_skin,
crypto_pk_t *private_key,
crypto_pk_t *prev_private_key,
char *handshake_reply_out, /*ONIONSKIN_REPLY_LEN*/
/*TAP_ONIONSKIN_REPLY_LEN*/
char *handshake_reply_out,
char *key_out,
size_t key_out_len)
{
char challenge[ONIONSKIN_CHALLENGE_LEN];
char challenge[TAP_ONIONSKIN_CHALLENGE_LEN];
crypto_dh_t *dh = NULL;
ssize_t len;
char *key_material=NULL;
@ -107,8 +110,9 @@ onion_skin_server_handshake(const char *onion_skin, /*ONIONSKIN_CHALLENGE_LEN*/
break;
note_crypto_pk_op(DEC_ONIONSKIN);
len = crypto_pk_private_hybrid_decrypt(k, challenge,
ONIONSKIN_CHALLENGE_LEN,
onion_skin, ONIONSKIN_CHALLENGE_LEN,
TAP_ONIONSKIN_CHALLENGE_LEN,
onion_skin,
TAP_ONIONSKIN_CHALLENGE_LEN,
PK_PKCS1_OAEP_PADDING,0);
if (len>0)
break;
@ -175,8 +179,8 @@ onion_skin_server_handshake(const char *onion_skin, /*ONIONSKIN_CHALLENGE_LEN*/
* After the invocation, call crypto_dh_free on handshake_state.
*/
int
onion_skin_client_handshake(crypto_dh_t *handshake_state,
const char *handshake_reply, /* ONIONSKIN_REPLY_LEN bytes */
onion_skin_TAP_client_handshake(crypto_dh_t *handshake_state,
const char *handshake_reply, /* TAP_ONIONSKIN_REPLY_LEN bytes */
char *key_out,
size_t key_out_len)
{

11
src/or/onion_tap.h
View File

@ -12,18 +12,23 @@
#ifndef TOR_ONION_TAP_H
#define TOR_ONION_TAP_H
int onion_skin_create(crypto_pk_t *router_key,
#define TAP_ONIONSKIN_CHALLENGE_LEN (PKCS1_OAEP_PADDING_OVERHEAD+\
CIPHER_KEY_LEN+\
DH_KEY_LEN)
#define TAP_ONIONSKIN_REPLY_LEN (DH_KEY_LEN+DIGEST_LEN)
int onion_skin_TAP_create(crypto_pk_t *router_key,
crypto_dh_t **handshake_state_out,
char *onion_skin_out);
int onion_skin_server_handshake(const char *onion_skin,
int onion_skin_TAP_server_handshake(const char *onion_skin,
crypto_pk_t *private_key,
crypto_pk_t *prev_private_key,
char *handshake_reply_out,
char *key_out,
size_t key_out_len);
int onion_skin_client_handshake(crypto_dh_t *handshake_state,
int onion_skin_TAP_client_handshake(crypto_dh_t *handshake_state,
const char *handshake_reply,
char *key_out,
size_t key_out_len);

40
src/or/or.h
View File

@ -1381,6 +1381,7 @@ typedef struct or_connection_t {
or_handshake_state_t *handshake_state; /**< If we are setting this connection
* up, state information to do so. */
time_t timestamp_lastempty; /**< When was the outbuf last completely empty?*/
time_t timestamp_last_added_nonpadding; /** When did we last add a
* non-padding cell to the outbuf? */
@ -2470,6 +2471,9 @@ typedef struct extend_info_t {
uint16_t port; /**< OR port. */
tor_addr_t addr; /**< IP address. */
crypto_pk_t *onion_key; /**< Current onionskin key. */
#ifdef CURVE25519_ENABLED
curve25519_public_key_t curve25519_onion_key;
#endif
} extend_info_t;
/** Certificate for v3 directory protocol: binds long-term authority identity
@ -2525,6 +2529,19 @@ typedef enum {
#define CRYPT_PATH_MAGIC 0x70127012u
struct fast_handshake_state_t;
struct ntor_handshake_state_t;
#define ONION_HANDSHAKE_TYPE_TAP 0x0000
#define ONION_HANDSHAKE_TYPE_FAST 0x0001
#define ONION_HANDSHAKE_TYPE_NTOR 0x0002
typedef struct {
uint16_t tag;
union {
struct fast_handshake_state_t *fast;
crypto_dh_t *tap;
struct ntor_handshake_state_t *ntor;
} u;
} onion_handshake_state_t;
/** Holds accounting information for a single step in the layered encryption
* performed by a circuit. Used only at the client edge of a circuit. */
typedef struct crypt_path_t {
@ -2543,16 +2560,15 @@ typedef struct crypt_path_t {
/** Digest state for cells heading away from the OR at this step. */
crypto_digest_t *b_digest;
/** Current state of Diffie-Hellman key negotiation with the OR at this
/** Current state of the handshake as performed with the OR at this
* step. */
crypto_dh_t *dh_handshake_state;
/** Current state of 'fast' (non-PK) key negotiation with the OR at this
* step. Used to save CPU when TLS is already providing all the
* authentication, secrecy, and integrity we need, and we're already
* distinguishable from an OR.
*/
struct fast_handshake_state_t *fast_handshake_state;
onion_handshake_state_t handshake_state;
/** Diffie-hellman handshake state for performing an introduction
* operations */
crypto_dh_t *rend_dh_handshake_state;
/** Negotiated key material shared with the OR at this step. */
/* XXXX RENAME */
char handshake_digest[DIGEST_LEN];/* KH in tor-spec.txt */
/** Information to extend to the OR at this step. */
@ -2594,10 +2610,6 @@ typedef struct {
#define CPATH_KEY_MATERIAL_LEN (20*2+16*2)
#define DH_KEY_LEN DH_BYTES
#define ONIONSKIN_CHALLENGE_LEN (PKCS1_OAEP_PADDING_OVERHEAD+\
CIPHER_KEY_LEN+\
DH_KEY_LEN)
#define ONIONSKIN_REPLY_LEN (DH_KEY_LEN+DIGEST_LEN)
/** Information used to build a circuit. */
typedef struct {
@ -2703,9 +2715,10 @@ typedef struct circuit_t {
* more. */
int deliver_window;
uint8_t n_chan_onionskin_len; /* XXXX MAKE THIS GET USED. */
/** For storage while n_chan is pending
* (state CIRCUIT_STATE_CHAN_WAIT). When defined, it is always
* length ONIONSKIN_CHALLENGE_LEN. */
* length n_chan_onionskin_len */
char *n_chan_onionskin;
/** When was this circuit created? We keep this timestamp with a higher
@ -2965,6 +2978,7 @@ typedef struct or_circuit_t {
char rend_token[REND_TOKEN_LEN];
/* ???? move to a subtype or adjunct structure? Wastes 20 bytes -NM */
/* XXXX rename this. */
char handshake_digest[DIGEST_LEN]; /**< Stores KH for the handshake. */
/** How many more relay_early cells can we send on this circuit, according

14
src/or/rendclient.c
View File

@ -206,12 +206,12 @@ rend_client_send_introduction(origin_circuit_t *introcirc,
cpath = rendcirc->build_state->pending_final_cpath =
tor_malloc_zero(sizeof(crypt_path_t));
cpath->magic = CRYPT_PATH_MAGIC;
if (!(cpath->dh_handshake_state = crypto_dh_new(DH_TYPE_REND))) {
if (!(cpath->rend_dh_handshake_state = crypto_dh_new(DH_TYPE_REND))) {
log_warn(LD_BUG, "Internal error: couldn't allocate DH.");
status = -2;
goto perm_err;
}
if (crypto_dh_generate_public(cpath->dh_handshake_state)<0) {
if (crypto_dh_generate_public(cpath->rend_dh_handshake_state)<0) {
log_warn(LD_BUG, "Internal error: couldn't generate g^x.");
status = -2;
goto perm_err;
@ -261,7 +261,7 @@ rend_client_send_introduction(origin_circuit_t *introcirc,
dh_offset = MAX_NICKNAME_LEN+1+REND_COOKIE_LEN;
}
if (crypto_dh_get_public(cpath->dh_handshake_state, tmp+dh_offset,
if (crypto_dh_get_public(cpath->rend_dh_handshake_state, tmp+dh_offset,
DH_KEY_LEN)<0) {
log_warn(LD_BUG, "Internal error: couldn't extract g^x.");
status = -2;
@ -896,9 +896,9 @@ rend_client_receive_rendezvous(origin_circuit_t *circ, const uint8_t *request,
tor_assert(circ->build_state);
tor_assert(circ->build_state->pending_final_cpath);
hop = circ->build_state->pending_final_cpath;
tor_assert(hop->dh_handshake_state);
tor_assert(hop->rend_dh_handshake_state);
if (crypto_dh_compute_secret(LOG_PROTOCOL_WARN,
hop->dh_handshake_state, (char*)request,
hop->rend_dh_handshake_state, (char*)request,
DH_KEY_LEN,
keys, DIGEST_LEN+CPATH_KEY_MATERIAL_LEN)<0) {
log_warn(LD_GENERAL, "Couldn't complete DH handshake.");
@ -914,8 +914,8 @@ rend_client_receive_rendezvous(origin_circuit_t *circ, const uint8_t *request,
goto err;
}
crypto_dh_free(hop->dh_handshake_state);
hop->dh_handshake_state = NULL;
crypto_dh_free(hop->rend_dh_handshake_state);
hop->rend_dh_handshake_state = NULL;
/* All is well. Extend the circuit. */
circuit_change_purpose(TO_CIRCUIT(circ), CIRCUIT_PURPOSE_C_REND_JOINED);

8
src/or/rendservice.c
View File

@ -1378,7 +1378,7 @@ rend_service_introduce(origin_circuit_t *circuit, const uint8_t *request,
cpath->magic = CRYPT_PATH_MAGIC;
launched->build_state->expiry_time = now + MAX_REND_TIMEOUT;
cpath->dh_handshake_state = dh;
cpath->rend_dh_handshake_state = dh;
dh = NULL;
if (circuit_init_cpath_crypto(cpath,keys+DIGEST_LEN,1)<0)
goto err;
@ -2624,7 +2624,7 @@ rend_service_rendezvous_has_opened(origin_circuit_t *circuit)
/* All we need to do is send a RELAY_RENDEZVOUS1 cell... */
memcpy(buf, circuit->rend_data->rend_cookie, REND_COOKIE_LEN);
if (crypto_dh_get_public(hop->dh_handshake_state,
if (crypto_dh_get_public(hop->rend_dh_handshake_state,
buf+REND_COOKIE_LEN, DH_KEY_LEN)<0) {
log_warn(LD_GENERAL,"Couldn't get DH public key.");
reason = END_CIRC_REASON_INTERNAL;
@ -2643,8 +2643,8 @@ rend_service_rendezvous_has_opened(origin_circuit_t *circuit)
goto err;
}
crypto_dh_free(hop->dh_handshake_state);
hop->dh_handshake_state = NULL;
crypto_dh_free(hop->rend_dh_handshake_state);
hop->rend_dh_handshake_state = NULL;
/* Append the cpath entry. */
hop->state = CPATH_STATE_OPEN;

7
src/or/router.c
View File

@ -1598,6 +1598,13 @@ router_digest_is_me(const char *digest)
tor_memeq(server_identitykey_digest, digest, DIGEST_LEN));
}
/** DOCDOC */
const uint8_t *
router_get_my_id_digest(void)
{
return (const uint8_t *)server_identitykey_digest;
}
/** Return true iff I'm a server and <b>digest</b> is equal to
* my identity digest. */
int

1
src/or/router.h
View File

@ -84,6 +84,7 @@ extrainfo_t *router_get_my_extrainfo(void);
const char *router_get_my_descriptor(void);
const char *router_get_descriptor_gen_reason(void);
int router_digest_is_me(const char *digest);
const uint8_t *router_get_my_id_digest(void);
int router_extrainfo_digest_is_me(const char *digest);
int router_is_me(const routerinfo_t *router);
int router_fingerprint_is_me(const char *fp);

16
src/test/bench.c
View File

@ -110,8 +110,8 @@ bench_onion_TAP(void)
int i;
crypto_pk_t *key, *key2;
uint64_t start, end;
char os[ONIONSKIN_CHALLENGE_LEN];
char or[ONIONSKIN_REPLY_LEN];
char os[TAP_ONIONSKIN_CHALLENGE_LEN];
char or[TAP_ONIONSKIN_REPLY_LEN];
crypto_dh_t *dh_out;
key = crypto_pk_new();
@ -122,17 +122,18 @@ bench_onion_TAP(void)
reset_perftime();
start = perftime();
for (i = 0; i < iters; ++i) {
onion_skin_create(key, &dh_out, os);
onion_skin_TAP_create(key, &dh_out, os);
crypto_dh_free(dh_out);
}
end = perftime();
printf("Client-side, part 1: %f usec.\n", NANOCOUNT(start, end, iters)/1e3);
onion_skin_create(key, &dh_out, os);
onion_skin_TAP_create(key, &dh_out, os);
start = perftime();
for (i = 0; i < iters; ++i) {
char key_out[CPATH_KEY_MATERIAL_LEN];
onion_skin_server_handshake(os, key, NULL, or, key_out, sizeof(key_out));
onion_skin_TAP_server_handshake(os, key, NULL, or,
key_out, sizeof(key_out));
}
end = perftime();
printf("Server-side, key guessed right: %f usec\n",
@ -141,7 +142,8 @@ bench_onion_TAP(void)
start = perftime();
for (i = 0; i < iters; ++i) {
char key_out[CPATH_KEY_MATERIAL_LEN];
onion_skin_server_handshake(os, key2, key, or, key_out, sizeof(key_out));
onion_skin_TAP_server_handshake(os, key2, key, or,
key_out, sizeof(key_out));
}
end = perftime();
printf("Server-side, key guessed wrong: %f usec.\n",
@ -153,7 +155,7 @@ bench_onion_TAP(void)
char key_out[CPATH_KEY_MATERIAL_LEN];
int s;
dh = crypto_dh_dup(dh_out);
s = onion_skin_client_handshake(dh, or, key_out, sizeof(key_out));
s = onion_skin_TAP_client_handshake(dh, or, key_out, sizeof(key_out));
tor_assert(s == 0);
}
end = perftime();

14
src/test/test.c
View File

@ -819,11 +819,11 @@ test_onion_handshake(void)
{
/* client-side */
crypto_dh_t *c_dh = NULL;
char c_buf[ONIONSKIN_CHALLENGE_LEN];
char c_buf[TAP_ONIONSKIN_CHALLENGE_LEN];
char c_keys[40];
/* server-side */
char s_buf[ONIONSKIN_REPLY_LEN];
char s_buf[TAP_ONIONSKIN_REPLY_LEN];
char s_keys[40];
/* shared */
@ -832,18 +832,18 @@ test_onion_handshake(void)
pk = pk_generate(0);
/* client handshake 1. */
memset(c_buf, 0, ONIONSKIN_CHALLENGE_LEN);
test_assert(! onion_skin_create(pk, &c_dh, c_buf));
memset(c_buf, 0, TAP_ONIONSKIN_CHALLENGE_LEN);
test_assert(! onion_skin_TAP_create(pk, &c_dh, c_buf));
/* server handshake */
memset(s_buf, 0, ONIONSKIN_REPLY_LEN);
memset(s_buf, 0, TAP_ONIONSKIN_REPLY_LEN);
memset(s_keys, 0, 40);
test_assert(! onion_skin_server_handshake(c_buf, pk, NULL,
test_assert(! onion_skin_TAP_server_handshake(c_buf, pk, NULL,
s_buf, s_keys, 40));
/* client handshake 2 */
memset(c_keys, 0, 40);
test_assert(! onion_skin_client_handshake(c_dh, s_buf, c_keys, 40));
test_assert(! onion_skin_TAP_client_handshake(c_dh, s_buf, c_keys, 40));
if (memcmp(c_keys, s_keys, 40)) {
puts("Aiiiie");