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/* Copyright 2001-2004 Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2019, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "core/or/or.h"
#include "core/or/circuitbuild.h"
#define CIRCUITLIST_PRIVATE
#include "core/or/circuitlist.h"
#include "lib/crypt_ops/crypto_rand.h"
#include "core/or/relay.h"
#include "core/crypto/relay_crypto.h"
#include "core/or/cell_st.h"
#include "core/or/or_circuit_st.h"
#include "core/or/origin_circuit_st.h"
#include "test/test.h"
static const char KEY_MATERIAL[3][CPATH_KEY_MATERIAL_LEN] = {
" 'My public key is in this signed x509 object', said Tom assertively.",
"'Let's chart the pedal phlanges in the tomb', said Tom cryptographically",
" 'Segmentation fault bugs don't _just happen_', said Tom seethingly.",
};
typedef struct testing_circuitset_t {
or_circuit_t *or_circ[3];
origin_circuit_t *origin_circ;
} testing_circuitset_t;
static int testing_circuitset_teardown(const struct testcase_t *testcase,
void *ptr);
static void *
testing_circuitset_setup(const struct testcase_t *testcase)
{
testing_circuitset_t *cs = tor_malloc_zero(sizeof(testing_circuitset_t));
int i;
for (i=0; i<3; ++i) {
cs->or_circ[i] = or_circuit_new(0, NULL);
tt_int_op(0, OP_EQ,
relay_crypto_init(&cs->or_circ[i]->crypto,
KEY_MATERIAL[i], sizeof(KEY_MATERIAL[i]),
0, 0));
}
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));
relay_crypto_init(&hop->crypto, KEY_MATERIAL[i], sizeof(KEY_MATERIAL[i]),
0, 0);
hop->state = CPATH_STATE_OPEN;
onion_append_to_cpath(&cs->origin_circ->cpath, hop);
tt_ptr_op(hop, OP_EQ, cs->origin_circ->cpath->prev);
}
return cs;
done:
testing_circuitset_teardown(testcase, cs);
return NULL;
}
static int
testing_circuitset_teardown(const struct testcase_t *testcase, void *ptr)
{
(void)testcase;
testing_circuitset_t *cs = ptr;
int i;
for (i=0; i<3; ++i) {
circuit_free_(TO_CIRCUIT(cs->or_circ[i]));
}
circuit_free_(TO_CIRCUIT(cs->origin_circ));
tor_free(cs);
return 1;
}
static const struct testcase_setup_t relaycrypt_setup = {
testing_circuitset_setup, testing_circuitset_teardown
};
/* Test encrypting a cell to the final hop on a circuit, decrypting it
* at each hop, and recognizing it at the other end. Then do it again
* and again as the state evolves. */
static void
test_relaycrypt_outbound(void *arg)
{
testing_circuitset_t *cs = arg;
tt_assert(cs);
relay_header_t rh;
cell_t orig;
cell_t encrypted;
int i, j;
for (i = 0; i < 50; ++i) {
crypto_rand((char *)&orig, sizeof(orig));
relay_header_unpack(&rh, orig.payload);
rh.recognized = 0;
memset(rh.integrity, 0, sizeof(rh.integrity));
relay_header_pack(orig.payload, &rh);
memcpy(&encrypted, &orig, sizeof(orig));
/* Encrypt the cell to the last hop */
relay_encrypt_cell_outbound(&encrypted, cs->origin_circ,
cs->origin_circ->cpath->prev);
for (j = 0; j < 3; ++j) {
crypt_path_t *layer_hint = NULL;
char recognized = 0;
int r = relay_decrypt_cell(TO_CIRCUIT(cs->or_circ[j]),
&encrypted,
CELL_DIRECTION_OUT,
&layer_hint, &recognized);
tt_int_op(r, OP_EQ, 0);
tt_ptr_op(layer_hint, OP_EQ, NULL);
tt_int_op(recognized != 0, OP_EQ, j == 2);
}
tt_mem_op(orig.payload, OP_EQ, encrypted.payload, CELL_PAYLOAD_SIZE);
}
done:
;
}
/* As above, but simulate inbound cells from the last hop. */
static void
test_relaycrypt_inbound(void *arg)
{
testing_circuitset_t *cs = arg;
tt_assert(cs);
relay_header_t rh;
cell_t orig;
cell_t encrypted;
int i, j;
for (i = 0; i < 50; ++i) {
crypto_rand((char *)&orig, sizeof(orig));
relay_header_unpack(&rh, orig.payload);
rh.recognized = 0;
memset(rh.integrity, 0, sizeof(rh.integrity));
relay_header_pack(orig.payload, &rh);
memcpy(&encrypted, &orig, sizeof(orig));
/* Encrypt the cell to the last hop */
relay_encrypt_cell_inbound(&encrypted, cs->or_circ[2]);
crypt_path_t *layer_hint = NULL;
char recognized = 0;
int r;
for (j = 1; j >= 0; --j) {
r = relay_decrypt_cell(TO_CIRCUIT(cs->or_circ[j]),
&encrypted,
CELL_DIRECTION_IN,
&layer_hint, &recognized);
tt_int_op(r, OP_EQ, 0);
tt_ptr_op(layer_hint, OP_EQ, NULL);
tt_int_op(recognized, OP_EQ, 0);
}
relay_decrypt_cell(TO_CIRCUIT(cs->origin_circ),
&encrypted,
CELL_DIRECTION_IN,
&layer_hint, &recognized);
tt_int_op(r, OP_EQ, 0);
tt_int_op(recognized, OP_EQ, 1);
tt_ptr_op(layer_hint, OP_EQ, cs->origin_circ->cpath->prev);
tt_mem_op(orig.payload, OP_EQ, encrypted.payload, CELL_PAYLOAD_SIZE);
}
done:
;
}
#define TEST(name) \
{ # name, test_relaycrypt_ ## name, 0, &relaycrypt_setup, NULL }
struct testcase_t relaycrypt_tests[] = {
TEST(outbound),
TEST(inbound),
END_OF_TESTCASES
};
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