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/* Copyright (c) 2013, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#define CONNECTION_PRIVATE
#define EXT_ORPORT_PRIVATE
#include "or.h"
#include "buffers.h"
#include "connection.h"
#include "ext_orport.h"
#include "test.h"
/* Test connection_or_remove_from_ext_or_id_map and
* connection_or_set_ext_or_identifier */
static void
test_ext_or_id_map(void *arg)
{
or_connection_t *c1 = NULL, *c2 = NULL, *c3 = NULL;
char *idp = NULL, *idp2 = NULL;
(void)arg;
/* pre-initialization */
tt_ptr_op(NULL, ==, connection_or_get_by_ext_or_id("xxxxxxxxxxxxxxxxxxxx"));
c1 = or_connection_new(CONN_TYPE_EXT_OR, AF_INET);
c2 = or_connection_new(CONN_TYPE_EXT_OR, AF_INET);
c3 = or_connection_new(CONN_TYPE_OR, AF_INET);
tt_ptr_op(c1->ext_or_conn_id, !=, NULL);
tt_ptr_op(c2->ext_or_conn_id, !=, NULL);
tt_ptr_op(c3->ext_or_conn_id, ==, NULL);
tt_ptr_op(c1, ==, connection_or_get_by_ext_or_id(c1->ext_or_conn_id));
tt_ptr_op(c2, ==, connection_or_get_by_ext_or_id(c2->ext_or_conn_id));
tt_ptr_op(NULL, ==, connection_or_get_by_ext_or_id("xxxxxxxxxxxxxxxxxxxx"));
idp = tor_memdup(c2->ext_or_conn_id, EXT_OR_CONN_ID_LEN);
/* Give c2 a new ID. */
connection_or_set_ext_or_identifier(c2);
test_mem_op(idp, !=, c2->ext_or_conn_id, EXT_OR_CONN_ID_LEN);
idp2 = tor_memdup(c2->ext_or_conn_id, EXT_OR_CONN_ID_LEN);
tt_assert(!tor_digest_is_zero(idp2));
tt_ptr_op(NULL, ==, connection_or_get_by_ext_or_id(idp));
tt_ptr_op(c2, ==, connection_or_get_by_ext_or_id(idp2));
/* Now remove it. */
connection_or_remove_from_ext_or_id_map(c2);
tt_ptr_op(NULL, ==, connection_or_get_by_ext_or_id(idp));
tt_ptr_op(NULL, ==, connection_or_get_by_ext_or_id(idp2));
done:
if (c1)
connection_free_(TO_CONN(c1));
if (c2)
connection_free_(TO_CONN(c2));
if (c3)
connection_free_(TO_CONN(c3));
tor_free(idp);
tor_free(idp2);
connection_or_clear_ext_or_id_map();
}
/* Simple connection_write_to_buf_impl_ replacement that unconditionally
* writes to outbuf. */
static void
connection_write_to_buf_impl_replacement(const char *string, size_t len,
connection_t *conn, int zlib)
{
(void) zlib;
tor_assert(string);
tor_assert(conn);
write_to_buf(string, len, conn->outbuf);
}
static char *
buf_get_contents(buf_t *buf, size_t *sz_out)
{
char *out;
*sz_out = buf_datalen(buf);
if (*sz_out >= ULONG_MAX)
return NULL; /* C'mon, really? */
out = tor_malloc(*sz_out + 1);
if (fetch_from_buf(out, (unsigned long)*sz_out, buf) != 0) {
tor_free(out);
return NULL;
}
out[*sz_out] = '\0'; /* Hopefully gratuitous. */
return out;
}
static void
test_ext_or_write_command(void *arg)
{
or_connection_t *c1;
char *cp = NULL;
char *buf = NULL;
size_t sz;
(void) arg;
MOCK(connection_write_to_buf_impl_,
connection_write_to_buf_impl_replacement);
c1 = or_connection_new(CONN_TYPE_EXT_OR, AF_INET);
tt_assert(c1);
/* Length too long */
tt_int_op(connection_write_ext_or_command(TO_CONN(c1), 100, "X", 100000),
<, 0);
/* Empty command */
tt_int_op(connection_write_ext_or_command(TO_CONN(c1), 0x99, NULL, 0),
==, 0);
cp = buf_get_contents(TO_CONN(c1)->outbuf, &sz);
tt_int_op(sz, ==, 4);
test_mem_op(cp, ==, "\x00\x99\x00\x00", 4);
tor_free(cp);
/* Medium command. */
tt_int_op(connection_write_ext_or_command(TO_CONN(c1), 0x99,
"Wai\0Hello", 9), ==, 0);
cp = buf_get_contents(TO_CONN(c1)->outbuf, &sz);
tt_int_op(sz, ==, 13);
test_mem_op(cp, ==, "\x00\x99\x00\x09Wai\x00Hello", 13);
tor_free(cp);
/* Long command */
buf = tor_malloc(65535);
memset(buf, 'x', 65535);
tt_int_op(connection_write_ext_or_command(TO_CONN(c1), 0xf00d,
buf, 65535), ==, 0);
cp = buf_get_contents(TO_CONN(c1)->outbuf, &sz);
tt_int_op(sz, ==, 65539);
test_mem_op(cp, ==, "\xf0\x0d\xff\xff", 4);
test_mem_op(cp+4, ==, buf, 65535);
tor_free(cp);
done:
if (c1)
connection_free_(TO_CONN(c1));
tor_free(cp);
tor_free(buf);
UNMOCK(connection_write_to_buf_impl_);
}
static void
test_ext_or_cookie_auth(void *arg)
{
char *reply=NULL, *client_hash=NULL;
size_t reply_len=0;
char hmac1[32], hmac2[32];
const char client_nonce[32] =
"Who is the third who walks alway";
char server_hash_input[] =
"ExtORPort authentication server-to-client hash"
"Who is the third who walks alway"
"................................";
char client_hash_input[] =
"ExtORPort authentication client-to-server hash"
"Who is the third who walks alway"
"................................";
(void)arg;
tt_int_op(strlen(client_hash_input), ==, 46+32+32);
tt_int_op(strlen(server_hash_input), ==, 46+32+32);
memcpy(ext_or_auth_cookie, "s beside you? When I count, ther", 32);
ext_or_auth_cookie_is_set = 1;
/* For this authentication, the client sends 32 random bytes (ClientNonce)
* The server replies with 32 byte ServerHash and 32 byte ServerNonce,
* where ServerHash is:
* HMAC-SHA256(CookieString,
* "ExtORPort authentication server-to-client hash" | ClientNonce |
* ServerNonce)"
* The client must reply with 32-byte ClientHash, which we compute as:
* ClientHash is computed as:
* HMAC-SHA256(CookieString,
* "ExtORPort authentication client-to-server hash" | ClientNonce |
* ServerNonce)
*/
/* Wrong length */
tt_int_op(-1, ==,
handle_client_auth_nonce(client_nonce, 33, &client_hash, &reply,
&reply_len));
tt_int_op(-1, ==,
handle_client_auth_nonce(client_nonce, 31, &client_hash, &reply,
&reply_len));
/* Now let's try this for real! */
tt_int_op(0, ==,
handle_client_auth_nonce(client_nonce, 32, &client_hash, &reply,
&reply_len));
tt_int_op(reply_len, ==, 64);
tt_ptr_op(reply, !=, NULL);
tt_ptr_op(client_hash, !=, NULL);
/* Fill in the server nonce into the hash inputs... */
memcpy(server_hash_input+46+32, reply+32, 32);
memcpy(client_hash_input+46+32, reply+32, 32);
/* Check the HMACs are correct... */
crypto_hmac_sha256(hmac1, ext_or_auth_cookie, 32, server_hash_input,
46+32+32);
crypto_hmac_sha256(hmac2, ext_or_auth_cookie, 32, client_hash_input,
46+32+32);
test_memeq(hmac1, reply, 32);
test_memeq(hmac2, client_hash, 32);
done:
tor_free(reply);
tor_free(client_hash);
}
struct testcase_t extorport_tests[] = {
{ "id_map", test_ext_or_id_map, TT_FORK, NULL, NULL },
{ "write_command", test_ext_or_write_command, TT_FORK, NULL, NULL },
{ "cookie_auth", test_ext_or_cookie_auth, TT_FORK, NULL, NULL },
END_OF_TESTCASES
};
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