// SPDX-License-Identifier: GPL-2.0
/* Author: Dmitry Safonov <[email protected]> */
#include <inttypes.h>
#include "../../../../include/linux/kernel.h"
#include "aolib.h"
const size_t nr_packets = 20;
const size_t msg_len = 100;
const size_t quota = nr_packets * msg_len;
union tcp_addr wrong_addr;
#define SECOND_PASSWORD "at all times sincere friends of freedom have been rare"
#define fault(type) (inj == FAULT_ ## type)
static const int test_vrf_ifindex = 200;
static const uint8_t test_vrf_tabid = 42;
static void setup_vrfs(void)
{
int err;
if (!kernel_config_has(KCONFIG_NET_VRF))
return;
err = add_vrf("ksft-vrf", test_vrf_tabid, test_vrf_ifindex, -1);
if (err)
test_error("Failed to add a VRF: %d", err);
err = link_set_up("ksft-vrf");
if (err)
test_error("Failed to bring up a VRF");
err = ip_route_add_vrf(veth_name, TEST_FAMILY,
this_ip_addr, this_ip_dest, test_vrf_tabid);
if (err)
test_error("Failed to add a route to VRF");
}
static int prepare_sk(union tcp_addr *addr, uint8_t sndid, uint8_t rcvid)
{
int sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
if (sk < 0)
test_error("socket()");
if (test_add_key(sk, DEFAULT_TEST_PASSWORD, this_ip_dest,
DEFAULT_TEST_PREFIX, 100, 100))
test_error("test_add_key()");
if (addr && test_add_key(sk, SECOND_PASSWORD, *addr,
DEFAULT_TEST_PREFIX, sndid, rcvid))
test_error("test_add_key()");
return sk;
}
static int prepare_lsk(union tcp_addr *addr, uint8_t sndid, uint8_t rcvid)
{
int sk = prepare_sk(addr, sndid, rcvid);
if (listen(sk, 10))
test_error("listen()");
return sk;
}
static int test_del_key(int sk, uint8_t sndid, uint8_t rcvid, bool async,
int current_key, int rnext_key)
{
struct tcp_ao_info_opt ao_info = {};
struct tcp_ao_getsockopt key = {};
struct tcp_ao_del del = {};
sockaddr_af sockaddr;
int err;
tcp_addr_to_sockaddr_in(&del.addr, &this_ip_dest, 0);
del.prefix = DEFAULT_TEST_PREFIX;
del.sndid = sndid;
del.rcvid = rcvid;
if (current_key >= 0) {
del.set_current = 1;
del.current_key = (uint8_t)current_key;
}
if (rnext_key >= 0) {
del.set_rnext = 1;
del.rnext = (uint8_t)rnext_key;
}
err = setsockopt(sk, IPPROTO_TCP, TCP_AO_DEL_KEY, &del, sizeof(del));
if (err < 0)
return -errno;
if (async)
return 0;
tcp_addr_to_sockaddr_in(&sockaddr, &this_ip_dest, 0);
err = test_get_one_ao(sk, &key, &sockaddr, sizeof(sockaddr),
DEFAULT_TEST_PREFIX, sndid, rcvid);
if (!err)
return -EEXIST;
if (err != -E2BIG)
test_error("getsockopt()");
if (current_key < 0 && rnext_key < 0)
return 0;
if (test_get_ao_info(sk, &ao_info))
test_error("getsockopt(TCP_AO_INFO) failed");
if (current_key >= 0 && ao_info.current_key != (uint8_t)current_key)
return -ENOTRECOVERABLE;
if (rnext_key >= 0 && ao_info.rnext != (uint8_t)rnext_key)
return -ENOTRECOVERABLE;
return 0;
}
static void try_delete_key(char *tst_name, int sk, uint8_t sndid, uint8_t rcvid,
bool async, int current_key, int rnext_key,
fault_t inj)
{
int err;
err = test_del_key(sk, sndid, rcvid, async, current_key, rnext_key);
if ((err == -EBUSY && fault(BUSY)) || (err == -EINVAL && fault(CURRNEXT))) {
test_ok("%s: key deletion was prevented", tst_name);
return;
}
if (err && fault(FIXME)) {
test_xfail("%s: failed to delete the key %u:%u %d",
tst_name, sndid, rcvid, err);
return;
}
if (!err) {
if (fault(BUSY) || fault(CURRNEXT)) {
test_fail("%s: the key was deleted %u:%u %d", tst_name,
sndid, rcvid, err);
} else {
test_ok("%s: the key was deleted", tst_name);
}
return;
}
test_fail("%s: can't delete the key %u:%u %d", tst_name, sndid, rcvid, err);
}
static int test_set_key(int sk, int current_keyid, int rnext_keyid)
{
struct tcp_ao_info_opt ao_info = {};
int err;
if (current_keyid >= 0) {
ao_info.set_current = 1;
ao_info.current_key = (uint8_t)current_keyid;
}
if (rnext_keyid >= 0) {
ao_info.set_rnext = 1;
ao_info.rnext = (uint8_t)rnext_keyid;
}
err = test_set_ao_info(sk, &ao_info);
if (err)
return err;
if (test_get_ao_info(sk, &ao_info))
test_error("getsockopt(TCP_AO_INFO) failed");
if (current_keyid >= 0 && ao_info.current_key != (uint8_t)current_keyid)
return -ENOTRECOVERABLE;
if (rnext_keyid >= 0 && ao_info.rnext != (uint8_t)rnext_keyid)
return -ENOTRECOVERABLE;
return 0;
}
static int test_add_current_rnext_key(int sk, const char *key, uint8_t keyflags,
union tcp_addr in_addr, uint8_t prefix,
bool set_current, bool set_rnext,
uint8_t sndid, uint8_t rcvid)
{
struct tcp_ao_add tmp = {};
int err;
err = test_prepare_key(&tmp, DEFAULT_TEST_ALGO, in_addr,
set_current, set_rnext,
prefix, 0, sndid, rcvid, 0, keyflags,
strlen(key), key);
if (err)
return err;
err = setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &tmp, sizeof(tmp));
if (err < 0)
return -errno;
return test_verify_socket_key(sk, &tmp);
}
static int __try_add_current_rnext_key(int sk, const char *key, uint8_t keyflags,
union tcp_addr in_addr, uint8_t prefix,
bool set_current, bool set_rnext,
uint8_t sndid, uint8_t rcvid)
{
struct tcp_ao_info_opt ao_info = {};
int err;
err = test_add_current_rnext_key(sk, key, keyflags, in_addr, prefix,
set_current, set_rnext, sndid, rcvid);
if (err)
return err;
if (test_get_ao_info(sk, &ao_info))
test_error("getsockopt(TCP_AO_INFO) failed");
if (set_current && ao_info.current_key != sndid)
return -ENOTRECOVERABLE;
if (set_rnext && ao_info.rnext != rcvid)
return -ENOTRECOVERABLE;
return 0;
}
static void try_add_current_rnext_key(char *tst_name, int sk, const char *key,
uint8_t keyflags,
union tcp_addr in_addr, uint8_t prefix,
bool set_current, bool set_rnext,
uint8_t sndid, uint8_t rcvid, fault_t inj)
{
int err;
err = __try_add_current_rnext_key(sk, key, keyflags, in_addr, prefix,
set_current, set_rnext, sndid, rcvid);
if (!err && !fault(CURRNEXT)) {
test_ok("%s", tst_name);
return;
}
if (err == -EINVAL && fault(CURRNEXT)) {
test_ok("%s", tst_name);
return;
}
test_fail("%s", tst_name);
}
static void check_closed_socket(void)
{
int sk;
sk = prepare_sk(&this_ip_dest, 200, 200);
try_delete_key("closed socket, delete a key", sk, 200, 200, 0, -1, -1, 0);
try_delete_key("closed socket, delete all keys", sk, 100, 100, 0, -1, -1, 0);
close(sk);
sk = prepare_sk(&this_ip_dest, 200, 200);
if (test_set_key(sk, 100, 200))
test_error("failed to set current/rnext keys");
try_delete_key("closed socket, delete current key", sk, 100, 100, 0, -1, -1, FAULT_BUSY);
try_delete_key("closed socket, delete rnext key", sk, 200, 200, 0, -1, -1, FAULT_BUSY);
close(sk);
sk = prepare_sk(&this_ip_dest, 200, 200);
if (test_add_key(sk, "Glory to heros!", this_ip_dest,
DEFAULT_TEST_PREFIX, 10, 11))
test_error("test_add_key()");
if (test_add_key(sk, "Glory to Ukraine!", this_ip_dest,
DEFAULT_TEST_PREFIX, 12, 13))
test_error("test_add_key()");
try_delete_key("closed socket, delete a key + set current/rnext", sk, 100, 100, 0, 10, 13, 0);
try_delete_key("closed socket, force-delete current key", sk, 10, 11, 0, 200, -1, 0);
try_delete_key("closed socket, force-delete rnext key", sk, 12, 13, 0, -1, 200, 0);
try_delete_key("closed socket, delete current+rnext key", sk, 200, 200, 0, -1, -1, FAULT_BUSY);
close(sk);
sk = prepare_sk(&this_ip_dest, 200, 200);
if (test_set_key(sk, 100, 200))
test_error("failed to set current/rnext keys");
try_add_current_rnext_key("closed socket, add + change current key",
sk, "Laaaa! Lalala-la-la-lalala...", 0,
this_ip_dest, DEFAULT_TEST_PREFIX,
true, false, 10, 20, 0);
try_add_current_rnext_key("closed socket, add + change rnext key",
sk, "Laaaa! Lalala-la-la-lalala...", 0,
this_ip_dest, DEFAULT_TEST_PREFIX,
false, true, 20, 10, 0);
close(sk);
}
static void assert_no_current_rnext(const char *tst_msg, int sk)
{
struct tcp_ao_info_opt ao_info = {};
if (test_get_ao_info(sk, &ao_info))
test_error("getsockopt(TCP_AO_INFO) failed");
errno = 0;
if (ao_info.set_current || ao_info.set_rnext) {
test_xfail("%s: the socket has current/rnext keys: %d:%d",
tst_msg,
(ao_info.set_current) ? ao_info.current_key : -1,
(ao_info.set_rnext) ? ao_info.rnext : -1);
} else {
test_ok("%s: the socket has no current/rnext keys", tst_msg);
}
}
static void assert_no_tcp_repair(void)
{
struct tcp_ao_repair ao_img = {};
socklen_t len = sizeof(ao_img);
int sk, err;
sk = prepare_sk(&this_ip_dest, 200, 200);
test_enable_repair(sk);
if (listen(sk, 10))
test_error("listen()");
errno = 0;
err = getsockopt(sk, SOL_TCP, TCP_AO_REPAIR, &ao_img, &len);
if (err && errno == EPERM)
test_ok("listen socket, getsockopt(TCP_AO_REPAIR) is restricted");
else
test_fail("listen socket, getsockopt(TCP_AO_REPAIR) works");
errno = 0;
err = setsockopt(sk, SOL_TCP, TCP_AO_REPAIR, &ao_img, sizeof(ao_img));
if (err && errno == EPERM)
test_ok("listen socket, setsockopt(TCP_AO_REPAIR) is restricted");
else
test_fail("listen socket, setsockopt(TCP_AO_REPAIR) works");
close(sk);
}
static void check_listen_socket(void)
{
int sk, err;
sk = prepare_lsk(&this_ip_dest, 200, 200);
try_delete_key("listen socket, delete a key", sk, 200, 200, 0, -1, -1, 0);
try_delete_key("listen socket, delete all keys", sk, 100, 100, 0, -1, -1, 0);
close(sk);
sk = prepare_lsk(&this_ip_dest, 200, 200);
err = test_set_key(sk, 100, -1);
if (err == -EINVAL)
test_ok("listen socket, setting current key not allowed");
else
test_fail("listen socket, set current key");
err = test_set_key(sk, -1, 200);
if (err == -EINVAL)
test_ok("listen socket, setting rnext key not allowed");
else
test_fail("listen socket, set rnext key");
close(sk);
sk = prepare_sk(&this_ip_dest, 200, 200);
if (test_set_key(sk, 100, 200))
test_error("failed to set current/rnext keys");
if (listen(sk, 10))
test_error("listen()");
assert_no_current_rnext("listen() after current/rnext keys set", sk);
try_delete_key("listen socket, delete current key from before listen()", sk, 100, 100, 0, -1, -1, FAULT_FIXME);
try_delete_key("listen socket, delete rnext key from before listen()", sk, 200, 200, 0, -1, -1, FAULT_FIXME);
close(sk);
assert_no_tcp_repair();
sk = prepare_lsk(&this_ip_dest, 200, 200);
if (test_add_key(sk, "Glory to heros!", this_ip_dest,
DEFAULT_TEST_PREFIX, 10, 11))
test_error("test_add_key()");
if (test_add_key(sk, "Glory to Ukraine!", this_ip_dest,
DEFAULT_TEST_PREFIX, 12, 13))
test_error("test_add_key()");
try_delete_key("listen socket, delete a key + set current/rnext", sk,
100, 100, 0, 10, 13, FAULT_CURRNEXT);
try_delete_key("listen socket, force-delete current key", sk,
10, 11, 0, 200, -1, FAULT_CURRNEXT);
try_delete_key("listen socket, force-delete rnext key", sk,
12, 13, 0, -1, 200, FAULT_CURRNEXT);
try_delete_key("listen socket, delete a key", sk,
200, 200, 0, -1, -1, 0);
close(sk);
sk = prepare_lsk(&this_ip_dest, 200, 200);
try_add_current_rnext_key("listen socket, add + change current key",
sk, "Laaaa! Lalala-la-la-lalala...", 0,
this_ip_dest, DEFAULT_TEST_PREFIX,
true, false, 10, 20, FAULT_CURRNEXT);
try_add_current_rnext_key("listen socket, add + change rnext key",
sk, "Laaaa! Lalala-la-la-lalala...", 0,
this_ip_dest, DEFAULT_TEST_PREFIX,
false, true, 20, 10, FAULT_CURRNEXT);
close(sk);
}
static const char *fips_fpath = "/proc/sys/crypto/fips_enabled";
static bool is_fips_enabled(void)
{
static int fips_checked = -1;
FILE *fenabled;
int enabled;
if (fips_checked >= 0)
return !!fips_checked;
if (access(fips_fpath, R_OK)) {
if (errno != ENOENT)
test_error("Can't open %s", fips_fpath);
fips_checked = 0;
return false;
}
fenabled = fopen(fips_fpath, "r");
if (!fenabled)
test_error("Can't open %s", fips_fpath);
if (fscanf(fenabled, "%d", &enabled) != 1)
test_error("Can't read from %s", fips_fpath);
fclose(fenabled);
fips_checked = !!enabled;
return !!fips_checked;
}
struct test_key {
char password[TCP_AO_MAXKEYLEN];
const char *alg;
unsigned int len;
uint8_t client_keyid;
uint8_t server_keyid;
uint8_t maclen;
uint8_t matches_client : 1,
matches_server : 1,
matches_vrf : 1,
is_current : 1,
is_rnext : 1,
used_on_server_tx : 1,
used_on_client_tx : 1,
skip_counters_checks : 1;
};
struct key_collection {
unsigned int nr_keys;
struct test_key *keys;
};
static struct key_collection collection;
#define TEST_MAX_MACLEN 16
const char *test_algos[] = {
"cmac(aes128)",
"hmac(sha1)", "hmac(sha512)", "hmac(sha384)", "hmac(sha256)",
"hmac(sha224)", "hmac(sha3-512)",
/* only if !CONFIG_FIPS */
#define TEST_NON_FIPS_ALGOS 2
"hmac(rmd160)", "hmac(md5)"
};
const unsigned int test_maclens[] = { 1, 4, 12, 16 };
#define MACLEN_SHIFT 2
#define ALGOS_SHIFT 4
static unsigned int make_mask(unsigned int shift, unsigned int prev_shift)
{
unsigned int ret = BIT(shift) - 1;
return ret << prev_shift;
}
static void init_key_in_collection(unsigned int index, bool randomized)
{
struct test_key *key = &collection.keys[index];
unsigned int algos_nr, algos_index;
/* Same for randomized and non-randomized test flows */
key->client_keyid = index;
key->server_keyid = 127 + index;
key->matches_client = 1;
key->matches_server = 1;
key->matches_vrf = 1;
/* not really even random, but good enough for a test */
key->len = rand() % (TCP_AO_MAXKEYLEN - TEST_TCP_AO_MINKEYLEN);
key->len += TEST_TCP_AO_MINKEYLEN;
randomize_buffer(key->password, key->len);
if (randomized) {
key->maclen = (rand() % TEST_MAX_MACLEN) + 1;
algos_index = rand();
} else {
unsigned int shift = MACLEN_SHIFT;
key->maclen = test_maclens[index & make_mask(shift, 0)];
algos_index = index & make_mask(ALGOS_SHIFT, shift);
}
algos_nr = ARRAY_SIZE(test_algos);
if (is_fips_enabled())
algos_nr -= TEST_NON_FIPS_ALGOS;
key->alg = test_algos[algos_index % algos_nr];
}
static int init_default_key_collection(unsigned int nr_keys, bool randomized)
{
size_t key_sz = sizeof(collection.keys[0]);
if (!nr_keys) {
free(collection.keys);
collection.keys = NULL;
return 0;
}
/*
* All keys have uniq sndid/rcvid and sndid != rcvid in order to
* check for any bugs/issues for different keyids, visible to both
* peers. Keyid == 254 is unused.
*/
if (nr_keys > 127)
test_error("Test requires too many keys, correct the source");
collection.keys = reallocarray(collection.keys, nr_keys, key_sz);
if (!collection.keys)
return -ENOMEM;
memset(collection.keys, 0, nr_keys * key_sz);
collection.nr_keys = nr_keys;
while (nr_keys--)
init_key_in_collection(nr_keys, randomized);
return 0;
}
static void test_key_error(const char *msg, struct test_key *key)
{
test_error("%s: key: { %s, %u:%u, %u, %u:%u:%u:%u:%u (%u)}",
msg, key->alg, key->client_keyid, key->server_keyid,
key->maclen, key->matches_client, key->matches_server,
key->matches_vrf, key->is_current, key->is_rnext, key->len);
}
static int test_add_key_cr(int sk, const char *pwd, unsigned int pwd_len,
union tcp_addr addr, uint8_t vrf,
uint8_t sndid, uint8_t rcvid,
uint8_t maclen, const char *alg,
bool set_current, bool set_rnext)
{
struct tcp_ao_add tmp = {};
uint8_t keyflags = 0;
int err;
if (!alg)
alg = DEFAULT_TEST_ALGO;
if (vrf)
keyflags |= TCP_AO_KEYF_IFINDEX;
err = test_prepare_key(&tmp, alg, addr, set_current, set_rnext,
DEFAULT_TEST_PREFIX, vrf, sndid, rcvid, maclen,
keyflags, pwd_len, pwd);
if (err)
return err;
err = setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &tmp, sizeof(tmp));
if (err < 0)
return -errno;
return test_verify_socket_key(sk, &tmp);
}
static void verify_current_rnext(const char *tst, int sk,
int current_keyid, int rnext_keyid)
{
struct tcp_ao_info_opt ao_info = {};
if (test_get_ao_info(sk, &ao_info))
test_error("getsockopt(TCP_AO_INFO) failed");
errno = 0;
if (current_keyid >= 0) {
if (!ao_info.set_current)
test_fail("%s: the socket doesn't have current key", tst);
else if (ao_info.current_key != current_keyid)
test_fail("%s: current key is not the expected one %d != %u",
tst, current_keyid, ao_info.current_key);
else
test_ok("%s: current key %u as expected",
tst, ao_info.current_key);
}
if (rnext_keyid >= 0) {
if (!ao_info.set_rnext)
test_fail("%s: the socket doesn't have rnext key", tst);
else if (ao_info.rnext != rnext_keyid)
test_fail("%s: rnext key is not the expected one %d != %u",
tst, rnext_keyid, ao_info.rnext);
else
test_ok("%s: rnext key %u as expected", tst, ao_info.rnext);
}
}
static int key_collection_socket(bool server, unsigned int port)
{
unsigned int i;
int sk;
if (server)
sk = test_listen_socket(this_ip_addr, port, 1);
else
sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP);
if (sk < 0)
test_error("socket()");
for (i = 0; i < collection.nr_keys; i++) {
struct test_key *key = &collection.keys[i];
union tcp_addr *addr = &wrong_addr;
uint8_t sndid, rcvid, vrf;
bool set_current = false, set_rnext = false;
if (key->matches_vrf)
vrf = 0;
else
vrf = test_vrf_ifindex;
if (server) {
if (key->matches_client)
addr = &this_ip_dest;
sndid = key->server_keyid;
rcvid = key->client_keyid;
} else {
if (key->matches_server)
addr = &this_ip_dest;
sndid = key->client_keyid;
rcvid = key->server_keyid;
key->used_on_client_tx = set_current = key->is_current;
key->used_on_server_tx = set_rnext = key->is_rnext;
}
if (test_add_key_cr(sk, key->password, key->len,
*addr, vrf, sndid, rcvid, key->maclen,
key->alg, set_current, set_rnext))
test_key_error("setsockopt(TCP_AO_ADD_KEY)", key);
#ifdef DEBUG
test_print("%s [%u/%u] key: { %s, %u:%u, %u, %u:%u:%u:%u (%u)}",
server ? "server" : "client", i, collection.nr_keys,
key->alg, rcvid, sndid, key->maclen,
key->matches_client, key->matches_server,
key->is_current, key->is_rnext, key->len);
#endif
}
return sk;
}
static void verify_counters(const char *tst_name, bool is_listen_sk, bool server,
struct tcp_ao_counters *a, struct tcp_ao_counters *b)
{
unsigned int i;
__test_tcp_ao_counters_cmp(tst_name, a, b, TEST_CNT_GOOD);
for (i = 0; i < collection.nr_keys; i++) {
struct test_key *key = &collection.keys[i];
uint8_t sndid, rcvid;
bool rx_cnt_expected;
if (key->skip_counters_checks)
continue;
if (server) {
sndid = key->server_keyid;
rcvid = key->client_keyid;
rx_cnt_expected = key->used_on_client_tx;
} else {
sndid = key->client_keyid;
rcvid = key->server_keyid;
rx_cnt_expected = key->used_on_server_tx;
}
test_tcp_ao_key_counters_cmp(tst_name, a, b,
rx_cnt_expected ? TEST_CNT_KEY_GOOD : 0,
sndid, rcvid);
}
test_tcp_ao_counters_free(a);
test_tcp_ao_counters_free(b);
test_ok("%s: passed counters checks", tst_name);
}
static struct tcp_ao_getsockopt *lookup_key(struct tcp_ao_getsockopt *buf,
size_t len, int sndid, int rcvid)
{
size_t i;
for (i = 0; i < len; i++) {
if (sndid >= 0 && buf[i].sndid != sndid)
continue;
if (rcvid >= 0 && buf[i].rcvid != rcvid)
continue;
return &buf[i];
}
return NULL;
}
static void verify_keys(const char *tst_name, int sk,
bool is_listen_sk, bool server)
{
socklen_t len = sizeof(struct tcp_ao_getsockopt);
struct tcp_ao_getsockopt *keys;
bool passed_test = true;
unsigned int i;
keys = calloc(collection.nr_keys, len);
if (!keys)
test_error("calloc()");
keys->nkeys = collection.nr_keys;
keys->get_all = 1;
if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, keys, &len)) {
free(keys);
test_error("getsockopt(TCP_AO_GET_KEYS)");
}
for (i = 0; i < collection.nr_keys; i++) {
struct test_key *key = &collection.keys[i];
struct tcp_ao_getsockopt *dump_key;
bool is_kdf_aes_128_cmac = false;
bool is_cmac_aes = false;
uint8_t sndid, rcvid;
bool matches = false;
if (server) {
if (key->matches_client)
matches = true;
sndid = key->server_keyid;
rcvid = key->client_keyid;
} else {
if (key->matches_server)
matches = true;
sndid = key->client_keyid;
rcvid = key->server_keyid;
}
if (!key->matches_vrf)
matches = false;
/* no keys get removed on the original listener socket */
if (is_listen_sk)
matches = true;
dump_key = lookup_key(keys, keys->nkeys, sndid, rcvid);
if (matches != !!dump_key) {
test_fail("%s: key %u:%u %s%s on the socket",
tst_name, sndid, rcvid,
key->matches_vrf ? "" : "[vrf] ",
matches ? "disappeared" : "yet present");
passed_test = false;
goto out;
}
if (!dump_key)
continue;
if (!strcmp("cmac(aes128)", key->alg)) {
is_kdf_aes_128_cmac = (key->len != 16);
is_cmac_aes = true;
}
if (is_cmac_aes) {
if (strcmp(dump_key->alg_name, "cmac(aes)")) {
test_fail("%s: key %u:%u cmac(aes) has unexpected alg %s",
tst_name, sndid, rcvid,
dump_key->alg_name);
passed_test = false;
continue;
}
} else if (strcmp(dump_key->alg_name, key->alg)) {
test_fail("%s: key %u:%u has unexpected alg %s != %s",
tst_name, sndid, rcvid,
dump_key->alg_name, key->alg);
passed_test = false;
continue;
}
if (is_kdf_aes_128_cmac) {
if (dump_key->keylen != 16) {
test_fail("%s: key %u:%u cmac(aes128) has unexpected len %u",
tst_name, sndid, rcvid,
dump_key->keylen);
continue;
}
} else if (dump_key->keylen != key->len) {
test_fail("%s: key %u:%u changed password len %u != %u",
tst_name, sndid, rcvid,
dump_key->keylen, key->len);
passed_test = false;
continue;
}
if (!is_kdf_aes_128_cmac &&
memcmp(dump_key->key, key->password, key->len)) {
test_fail("%s: key %u:%u has different password",
tst_name, sndid, rcvid);
passed_test = false;
continue;
}
if (dump_key->maclen != key->maclen) {
test_fail("%s: key %u:%u changed maclen %u != %u",
tst_name, sndid, rcvid,
dump_key->maclen, key->maclen);
passed_test = false;
continue;
}
}
if (passed_test)
test_ok("%s: The socket keys are consistent with the expectations",
tst_name);
out:
free(keys);
}
static int start_server(const char *tst_name, unsigned int port, size_t quota,
struct tcp_ao_counters *begin,
unsigned int current_index, unsigned int rnext_index)
{
struct tcp_ao_counters lsk_c1, lsk_c2;
ssize_t bytes;
int sk, lsk;
synchronize_threads(); /* 1: key collection initialized */
lsk = key_collection_socket(true, port);
if (test_get_tcp_ao_counters(lsk, &lsk_c1))
test_error("test_get_tcp_ao_counters()");
synchronize_threads(); /* 2: MKTs added => connect() */
if (test_wait_fd(lsk, TEST_TIMEOUT_SEC, 0))
test_error("test_wait_fd()");
sk = accept(lsk, NULL, NULL);
if (sk < 0)
test_error("accept()");
if (test_get_tcp_ao_counters(sk, begin))
test_error("test_get_tcp_ao_counters()");
synchronize_threads(); /* 3: accepted => send data */
if (test_get_tcp_ao_counters(lsk, &lsk_c2))
test_error("test_get_tcp_ao_counters()");
verify_keys(tst_name, lsk, true, true);
close(lsk);
bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC);
if (bytes != quota)
test_fail("%s: server served: %zd", tst_name, bytes);
else
test_ok("%s: server alive", tst_name);
verify_counters(tst_name, true, true, &lsk_c1, &lsk_c2);
return sk;
}
static void end_server(const char *tst_name, int sk,
struct tcp_ao_counters *begin)
{
struct tcp_ao_counters end;
if (test_get_tcp_ao_counters(sk, &end))
test_error("test_get_tcp_ao_counters()");
verify_keys(tst_name, sk, false, true);
synchronize_threads(); /* 4: verified => closed */
close(sk);
verify_counters(tst_name, false, true, begin, &end);
synchronize_threads(); /* 5: counters */
}
static void try_server_run(const char *tst_name, unsigned int port, size_t quota,
unsigned int current_index, unsigned int rnext_index)
{
struct tcp_ao_counters tmp;
int sk;
sk = start_server(tst_name, port, quota, &tmp,
current_index, rnext_index);
end_server(tst_name, sk, &tmp);
}
static void server_rotations(const char *tst_name, unsigned int port,
size_t quota, unsigned int rotations,
unsigned int current_index, unsigned int rnext_index)
{
struct tcp_ao_counters tmp;
unsigned int i;
int sk;
sk = start_server(tst_name, port, quota, &tmp,
current_index, rnext_index);
for (i = current_index + 1; rotations > 0; i++, rotations--) {
ssize_t bytes;
if (i >= collection.nr_keys)
i = 0;
bytes = test_server_run(sk, quota, TEST_TIMEOUT_SEC);
if (bytes != quota) {
test_fail("%s: server served: %zd", tst_name, bytes);
return;
}
verify_current_rnext(tst_name, sk,
collection.keys[i].server_keyid, -1);
synchronize_threads(); /* verify current/rnext */
}
end_server(tst_name, sk, &tmp);
}
static int run_client(const char *tst_name, unsigned int port,
unsigned int nr_keys, int current_index, int rnext_index,
struct tcp_ao_counters *before,
const size_t msg_sz, const size_t msg_nr)
{
int sk;
synchronize_threads(); /* 1: key collection initialized */
sk = key_collection_socket(false, port);
if (current_index >= 0 || rnext_index >= 0) {
int sndid = -1, rcvid = -1;
if (current_index >= 0)
sndid = collection.keys[current_index].client_keyid;
if (rnext_index >= 0)
rcvid = collection.keys[rnext_index].server_keyid;
if (test_set_key(sk, sndid, rcvid))
test_error("failed to set current/rnext keys");
}
if (before && test_get_tcp_ao_counters(sk, before))
test_error("test_get_tcp_ao_counters()");
synchronize_threads(); /* 2: MKTs added => connect() */
if (test_connect_socket(sk, this_ip_dest, port++) <= 0)
test_error("failed to connect()");
if (current_index < 0)
current_index = nr_keys - 1;
if (rnext_index < 0)
rnext_index = nr_keys - 1;
collection.keys[current_index].used_on_client_tx = 1;
collection.keys[rnext_index].used_on_server_tx = 1;
synchronize_threads(); /* 3: accepted => send data */
if (test_client_verify(sk, msg_sz, msg_nr, TEST_TIMEOUT_SEC)) {
test_fail("verify failed");
close(sk);
if (before)
test_tcp_ao_counters_free(before);
return -1;
}
return sk;
}
static int start_client(const char *tst_name, unsigned int port,
unsigned int nr_keys, int current_index, int rnext_index,
struct tcp_ao_counters *before,
const size_t msg_sz, const size_t msg_nr)
{
if (init_default_key_collection(nr_keys, true))
test_error("Failed to init the key collection");
return run_client(tst_name, port, nr_keys, current_index,
rnext_index, before, msg_sz, msg_nr);
}
static void end_client(const char *tst_name, int sk, unsigned int nr_keys,
int current_index, int rnext_index,
struct tcp_ao_counters *start)
{
struct tcp_ao_counters end;
/* Some application may become dependent on this kernel choice */
if (current_index < 0)
current_index = nr_keys - 1;
if (rnext_index < 0)
rnext_index = nr_keys - 1;
verify_current_rnext(tst_name, sk,
collection.keys[current_index].client_keyid,
collection.keys[rnext_index].server_keyid);
if (start && test_get_tcp_ao_counters(sk, &end))
test_error("test_get_tcp_ao_counters()");
verify_keys(tst_name, sk, false, false);
synchronize_threads(); /* 4: verify => closed */
close(sk);
if (start)
verify_counters(tst_name, false, false, start, &end);
synchronize_threads(); /* 5: counters */
}
static void try_unmatched_keys(int sk, int *rnext_index, unsigned int port)
{
struct test_key *key;
unsigned int i = 0;
int err;
do {
key = &collection.keys[i];
if (!key->matches_server)
break;
} while (++i < collection.nr_keys);
if (key->matches_server)
test_error("all keys on client match the server");
err = test_add_key_cr(sk, key->password, key->len, wrong_addr,
0, key->client_keyid, key->server_keyid,
key->maclen, key->alg, 0, 0);
if (!err) {
test_fail("Added a key with non-matching ip-address for established sk");
return;
}
if (err == -EINVAL)
test_ok("Can't add a key with non-matching ip-address for established sk");
else
test_error("Failed to add a key");
err = test_add_key_cr(sk, key->password, key->len, this_ip_dest,
test_vrf_ifindex,
key->client_keyid, key->server_keyid,
key->maclen, key->alg, 0, 0);
if (!err) {
test_fail("Added a key with non-matching VRF for established sk");
return;
}
if (err == -EINVAL)
test_ok("Can't add a key with non-matching VRF for established sk");
else
test_error("Failed to add a key");
for (i = 0; i < collection.nr_keys; i++) {
key = &collection.keys[i];
if (!key->matches_client)
break;
}
if (key->matches_client)
test_error("all keys on server match the client");
if (test_set_key(sk, -1, key->server_keyid))
test_error("Can't change the current key");
trace_ao_event_expect(TCP_AO_RNEXT_REQUEST, this_ip_addr, this_ip_dest,
-1, port, 0, -1, -1, -1, -1, -1,
-1, key->server_keyid, -1);
if (test_client_verify(sk, msg_len, nr_packets, TEST_TIMEOUT_SEC))
test_fail("verify failed");
*rnext_index = i;
}
static int client_non_matching(const char *tst_name, unsigned int port,
unsigned int nr_keys,
int current_index, int rnext_index,
const size_t msg_sz, const size_t msg_nr)
{
unsigned int i;
if (init_default_key_collection(nr_keys, true))
test_error("Failed to init the key collection");
for (i = 0; i < nr_keys; i++) {
/* key (0, 0) matches */
collection.keys[i].matches_client = !!((i + 3) % 4);
collection.keys[i].matches_server = !!((i + 2) % 4);
if (kernel_config_has(KCONFIG_NET_VRF))
collection.keys[i].matches_vrf = !!((i + 1) % 4);
}
return run_client(tst_name, port, nr_keys, current_index,
rnext_index, NULL, msg_sz, msg_nr);
}
static void check_current_back(const char *tst_name, unsigned int port,
unsigned int nr_keys,
unsigned int current_index, unsigned int rnext_index,
unsigned int rotate_to_index)
{
struct tcp_ao_counters tmp;
int sk;
sk = start_client(tst_name, port, nr_keys, current_index, rnext_index,
&tmp, msg_len, nr_packets);
if (sk < 0)
return;
if (test_set_key(sk, collection.keys[rotate_to_index].client_keyid, -1))
test_error("Can't change the current key");
trace_ao_event_expect(TCP_AO_RNEXT_REQUEST, this_ip_dest, this_ip_addr,
port, -1, 0, -1, -1, -1, -1, -1,
collection.keys[rotate_to_index].client_keyid,
collection.keys[current_index].client_keyid, -1);
if (test_client_verify(sk, msg_len, nr_packets, TEST_TIMEOUT_SEC))
test_fail("verify failed");
/* There is a race here: between setting the current_key with
* setsockopt(TCP_AO_INFO) and starting to send some data - there
* might have been a segment received with the desired
* RNext_key set. In turn that would mean that the first outgoing
* segment will have the desired current_key (flipped back).
* Which is what the user/test wants. As it's racy, skip checking
* the counters, yet check what are the resulting current/rnext
* keys on both sides.
*/
collection.keys[rotate_to_index].skip_counters_checks = 1;
end_client(tst_name, sk, nr_keys, current_index, rnext_index, &tmp);
}
static void roll_over_keys(const char *tst_name, unsigned int port,
unsigned int nr_keys, unsigned int rotations,
unsigned int current_index, unsigned int rnext_index)
{
struct tcp_ao_counters tmp;
unsigned int i;
int sk;
sk = start_client(tst_name, port, nr_keys, current_index, rnext_index,
&tmp, msg_len, nr_packets);
if (sk < 0)
return;
for (i = rnext_index + 1; rotations > 0; i++, rotations--) {
if (i >= collection.nr_keys)
i = 0;
trace_ao_event_expect(TCP_AO_RNEXT_REQUEST,
this_ip_addr, this_ip_dest,
-1, port, 0, -1, -1, -1, -1, -1,
i == 0 ? -1 : collection.keys[i - 1].server_keyid,
collection.keys[i].server_keyid, -1);
if (test_set_key(sk, -1, collection.keys[i].server_keyid))
test_error("Can't change the Rnext key");
if (test_client_verify(sk, msg_len, nr_packets, TEST_TIMEOUT_SEC)) {
test_fail("verify failed");
close(sk);
test_tcp_ao_counters_free(&tmp);
return;
}
verify_current_rnext(tst_name, sk, -1,
collection.keys[i].server_keyid);
collection.keys[i].used_on_server_tx = 1;
synchronize_threads(); /* verify current/rnext */
}
end_client(tst_name, sk, nr_keys, current_index, rnext_index, &tmp);
}
static void try_client_run(const char *tst_name, unsigned int port,
unsigned int nr_keys, int current_index, int rnext_index)
{
struct tcp_ao_counters tmp;
int sk;
sk = start_client(tst_name, port, nr_keys, current_index, rnext_index,
&tmp, msg_len, nr_packets);
if (sk < 0)
return;
end_client(tst_name, sk, nr_keys, current_index, rnext_index, &tmp);
}
static void try_client_match(const char *tst_name, unsigned int port,
unsigned int nr_keys,
int current_index, int rnext_index)
{
int sk;
sk = client_non_matching(tst_name, port, nr_keys, current_index,
rnext_index, msg_len, nr_packets);
if (sk < 0)
return;
try_unmatched_keys(sk, &rnext_index, port);
end_client(tst_name, sk, nr_keys, current_index, rnext_index, NULL);
}
static void *server_fn(void *arg)
{
unsigned int port = test_server_port;
setup_vrfs();
try_server_run("server: Check current/rnext keys unset before connect()",
port++, quota, 19, 19);
try_server_run("server: Check current/rnext keys set before connect()",
port++, quota, 10, 10);
try_server_run("server: Check current != rnext keys set before connect()",
port++, quota, 5, 10);
try_server_run("server: Check current flapping back on peer's RnextKey request",
port++, quota * 2, 5, 10);
server_rotations("server: Rotate over all different keys", port++,
quota, 20, 0, 0);
try_server_run("server: Check accept() => established key matching",
port++, quota * 2, 0, 0);
synchronize_threads(); /* don't race to exit: client exits */
return NULL;
}
static void check_established_socket(void)
{
unsigned int port = test_server_port;
setup_vrfs();
try_client_run("client: Check current/rnext keys unset before connect()",
port++, 20, -1, -1);
try_client_run("client: Check current/rnext keys set before connect()",
port++, 20, 10, 10);
try_client_run("client: Check current != rnext keys set before connect()",
port++, 20, 10, 5);
check_current_back("client: Check current flapping back on peer's RnextKey request",
port++, 20, 10, 5, 2);
roll_over_keys("client: Rotate over all different keys", port++,
20, 20, 0, 0);
try_client_match("client: Check connect() => established key matching",
port++, 20, 0, 0);
}
static void *client_fn(void *arg)
{
if (inet_pton(TEST_FAMILY, TEST_WRONG_IP, &wrong_addr) != 1)
test_error("Can't convert ip address %s", TEST_WRONG_IP);
check_closed_socket();
check_listen_socket();
check_established_socket();
return NULL;
}
int main(int argc, char *argv[])
{
test_init(121, server_fn, client_fn);
return 0;
}
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