WIP VoLTE support for Asterisk
This commit is contained in:
Andreas Eversberg
parent
b84efadfa1
commit
93c9780637
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@ -26,15 +26,25 @@
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#define PJ_CONSUME PJ_TRUE
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#define fmt_str(str) (int)(str).slen, (str).ptr
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const pj_str_t STR_SUPPORTED = { "Supported", 9 };
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const pj_str_t STR_REQUIRE = { "Require", 7 };
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const pj_str_t STR_PROXY_REQUIRE = { "Proxy-Require", 13 };
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const pj_str_t STR_PATH = { "path", 4 };
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const pj_str_t STR_SEC_AGREE = { "sec-agree", 9 };
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const pj_str_t STR_AUTHORIZATION = { "Authorization", 13 };
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const pj_str_t STR_SECURITY_CLIENT = { "Security-Client", 15 };
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const pj_str_t STR_SECURITY_SERVER = { "Security-Server", 15 };
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const pj_str_t STR_Q = { "q", 1 };
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const pj_str_t STR_PROT = { "prot", 4 };
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const pj_str_t STR_MOD = { "mod", 3 };
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const pj_str_t STR_SPI_C = { "spi-c", 5 };
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const pj_str_t STR_SPI_S = { "spi-s", 5 };
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const pj_str_t STR_PORT_C = { "port-c", 6 };
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const pj_str_t STR_PORT_S = { "port-s", 6 };
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const pj_str_t STR_ALG = { "alg", 3 };
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const pj_str_t STR_EALG = { "ealg", 4 };
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struct ipsec_alg {
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const char *sip_name;
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@ -42,22 +52,27 @@ struct ipsec_alg {
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};
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const struct ipsec_alg ipsec_alg[] = {
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{ "hmac-md5-96", "hmac(md5)" },
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{ "hmac-sha-1-96", "hmac(sha1)" },
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{ "hmac-md5-96", "md5" },
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{ "hmac-sha-1-96", "sha1" },
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{ NULL, NULL }
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};
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const struct ipsec_alg ipsec_ealg[] = {
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{ "null", "ecb(cipher_null)" },
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{ "null", "cipher_null" },
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{ NULL, NULL }
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};
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static unsigned char aka_res[8];
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static struct mnl_socket *g_mnl_socket = NULL;
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struct sockaddr_storage g_src_addr, g_dst_addr;
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static uint32_t g_spi_c, g_spi_s;
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static pj_bool_t g_spi_c_valid = PJ_FALSE, g_spi_s_valid = PJ_TRUE;
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struct sockaddr_storage g_local_addr_c, g_local_addr_s;
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struct sockaddr_storage g_remote_addr_c, g_remote_addr_s;
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static uint32_t g_local_spi_c, g_local_spi_s;
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static uint32_t g_remote_spi_c, g_remote_spi_s;
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static pj_bool_t g_local_sa_c_set = PJ_FALSE, g_local_sa_s_set = PJ_FALSE;
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static pj_bool_t g_remote_sa_c_set = PJ_FALSE, g_remote_sa_s_set = PJ_FALSE;
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static pj_bool_t g_local_sp_c_set = PJ_FALSE, g_local_sp_s_set = PJ_FALSE;
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static pj_bool_t g_remote_sp_c_set = PJ_FALSE, g_remote_sp_s_set = PJ_FALSE;
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static void copy_pj_sockaddr_to_sockaddr_storage(const pj_sockaddr *src, struct sockaddr_storage *dst)
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{
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@ -93,17 +108,122 @@ static char *sockaddr_storage_to_string(const struct sockaddr_storage *addr, cha
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return ip_string;
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}
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static void sockaddr_storage_port(struct sockaddr_storage *addr, uint16_t port)
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{
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switch (((struct sockaddr *)addr)->sa_family) {
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case AF_INET:
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((struct sockaddr_in *)addr)->sin_port = htons(port);
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break;
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case AF_INET6:
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((struct sockaddr_in6 *)addr)->sin6_port = htons(port);
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break;
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}
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}
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/* Delete old SA and SP entries upon new registration or module exit. */
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static void cleanup_xfrm(void)
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{
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if (g_spi_c_valid) {
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xfrm_sa_del(g_mnl_socket, (const struct sockaddr *)&g_src_addr, (const struct sockaddr *)&g_dst_addr, g_spi_c);
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g_spi_c_valid = PJ_FALSE;
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if (g_local_sa_c_set) {
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xfrm_sa_del(g_mnl_socket, (const struct sockaddr *)&g_local_addr_c, (const struct sockaddr *)&g_remote_addr_c, g_local_spi_c);
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g_local_sa_c_set = PJ_FALSE;
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}
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if (g_spi_s_valid) {
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xfrm_sa_del(g_mnl_socket, (const struct sockaddr *)&g_src_addr, (const struct sockaddr *)&g_dst_addr, g_spi_s);
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g_spi_s_valid = PJ_FALSE;
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if (g_local_sa_s_set) {
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xfrm_sa_del(g_mnl_socket, (const struct sockaddr *)&g_local_addr_s, (const struct sockaddr *)&g_remote_addr_s, g_local_spi_s);
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g_local_sa_s_set = PJ_FALSE;
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}
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if (g_remote_sa_c_set) {
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xfrm_sa_del(g_mnl_socket, (const struct sockaddr *)&g_remote_addr_c, (const struct sockaddr *)&g_local_addr_c, g_remote_spi_c);
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g_remote_sa_c_set = PJ_FALSE;
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}
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if (g_remote_sa_s_set) {
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xfrm_sa_del(g_mnl_socket, (const struct sockaddr *)&g_remote_addr_s, (const struct sockaddr *)&g_local_addr_s, g_remote_spi_s);
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g_remote_sa_s_set = PJ_FALSE;
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}
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if (g_local_sp_c_set) {
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xfrm_policy_del(g_mnl_socket, (const struct sockaddr *)&g_local_addr_c, (const struct sockaddr *)&g_remote_addr_c, false);
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g_local_sp_c_set = PJ_FALSE;
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}
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if (g_local_sp_s_set) {
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xfrm_policy_del(g_mnl_socket, (const struct sockaddr *)&g_local_addr_s, (const struct sockaddr *)&g_remote_addr_s, false);
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g_local_sp_s_set = PJ_FALSE;
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}
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if (g_remote_sp_c_set) {
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xfrm_policy_del(g_mnl_socket, (const struct sockaddr *)&g_remote_addr_c, (const struct sockaddr *)&g_local_addr_c, true);
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g_remote_sp_c_set = PJ_FALSE;
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}
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if (g_remote_sp_s_set) {
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xfrm_policy_del(g_mnl_socket, (const struct sockaddr *)&g_remote_addr_s, (const struct sockaddr *)&g_local_addr_s, true);
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g_remote_sp_s_set = PJ_FALSE;
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}
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}
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struct security_server {
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pj_str_t q;
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pj_str_t prot;
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pj_str_t mod;
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pj_str_t spi_c;
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pj_str_t spi_s;
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pj_str_t port_c;
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pj_str_t port_s;
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pj_str_t alg;
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pj_str_t ealg;
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};
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static void on_syntax_error(pj_scanner *scanner)
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{
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PJ_UNUSED_ARG(scanner);
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}
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static void parse_security_server(pj_pool_t *pool, char *buf, pj_size_t size, struct security_server *sec)
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{
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pj_scanner scanner;
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memset(sec, 0, sizeof(*sec));
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pj_scan_init(&scanner, buf, size, 0, &on_syntax_error);
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for (;;) {
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pj_str_t name, value;
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pjsip_parse_param_imp(&scanner, pool, &name, &value, 0);
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if (!pj_stricmp(&name, &STR_Q)) {
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sec->q = value;
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} else
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if (!pj_stricmp(&name, &STR_PROT)) {
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sec->prot = value;
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} else
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if (!pj_stricmp(&name, &STR_MOD)) {
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sec->mod = value;
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} else
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if (!pj_stricmp(&name, &STR_SPI_C)) {
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sec->spi_c = value;
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} else
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if (!pj_stricmp(&name, &STR_SPI_S)) {
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sec->spi_s = value;
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} else
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if (!pj_stricmp(&name, &STR_PORT_C)) {
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sec->port_c = value;
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} else
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if (!pj_stricmp(&name, &STR_PORT_S)) {
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sec->port_s = value;
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} else
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if (!pj_stricmp(&name, &STR_ALG)) {
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sec->alg = value;
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} else
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if (!pj_stricmp(&name, &STR_EALG)) {
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sec->ealg = value;
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}
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if (pj_scan_is_eof(&scanner))
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break;
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/* Eat semicolon */
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if (*scanner.curptr == ';')
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pj_scan_get_char(&scanner);
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}
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pj_scan_fini(&scanner);
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}
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static pj_status_t on_load(pjsip_endpoint *endpt)
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@ -221,7 +341,6 @@ static pj_status_t on_tx_register_request(pjsip_tx_data *tdata)
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pjsip_generic_array_hdr *hdr;
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int rc;
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ast_log(LOG_ERROR, "Unsetting RES paassword.\n");
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volte_auth = NULL;
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if (!is_ims(tdata->msg))
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@ -236,23 +355,27 @@ static pj_status_t on_tx_register_request(pjsip_tx_data *tdata)
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cleanup_xfrm();
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/* Get local and remote peer address. */
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copy_pj_sockaddr_to_sockaddr_storage(&tdata->tp_info.transport->local_addr, &g_src_addr);
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copy_pj_sockaddr_to_sockaddr_storage(&tdata->tp_info.dst_addr, &g_dst_addr);
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ast_log(LOG_DEBUG, "peers %s->%s\n", sockaddr_storage_to_string(&g_src_addr, src_str, sizeof(src_str)), sockaddr_storage_to_string(&g_dst_addr, dst_str, sizeof(dst_str)));
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copy_pj_sockaddr_to_sockaddr_storage(&tdata->tp_info.transport->local_addr, &g_local_addr_c);
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copy_pj_sockaddr_to_sockaddr_storage(&tdata->tp_info.transport->local_addr, &g_local_addr_s);
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copy_pj_sockaddr_to_sockaddr_storage(&tdata->tp_info.dst_addr, &g_remote_addr_c);
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copy_pj_sockaddr_to_sockaddr_storage(&tdata->tp_info.dst_addr, &g_remote_addr_s);
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sockaddr_storage_port(&g_remote_addr_c, 0x0001);
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sockaddr_storage_port(&g_remote_addr_s, 0x0001);
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ast_log(LOG_DEBUG, "peers %s->%s\n", sockaddr_storage_to_string(&g_local_addr_c, src_str, sizeof(src_str)), sockaddr_storage_to_string(&g_remote_addr_c, dst_str, sizeof(dst_str)));
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/* Allocate SPI-C and SPI-S towards remote peer. */
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rc = xfrm_spi_alloc(g_mnl_socket, 2342, &g_spi_c, (const struct sockaddr *)&g_src_addr, (const struct sockaddr *)&g_dst_addr);
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rc = xfrm_spi_alloc(g_mnl_socket, 2342, &g_local_spi_c, (const struct sockaddr *)&g_local_addr_c, (const struct sockaddr *)&g_remote_addr_c);
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if (rc < 0) {
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spi_alloc_failed:
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spi_alloc_failed:
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ast_log(LOG_ERROR, "Failed to request SPI.\n");
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return PJ_CONSUME;
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}
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g_spi_s_valid = PJ_TRUE;
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rc = xfrm_spi_alloc(g_mnl_socket, 2342, &g_spi_s, (const struct sockaddr *)&g_src_addr, (const struct sockaddr *)&g_dst_addr);
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g_local_sa_s_set = PJ_TRUE;
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rc = xfrm_spi_alloc(g_mnl_socket, 2342, &g_local_spi_s, (const struct sockaddr *)&g_local_addr_s, (const struct sockaddr *)&g_remote_addr_s);
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if (rc < 0)
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goto spi_alloc_failed;
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g_spi_c_valid = PJ_TRUE;
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ast_log(LOG_DEBUG, "SPI-C=0x%08x SPI-S=0x%08x\n", g_spi_s, g_spi_c);
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g_local_sa_c_set = PJ_TRUE;
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ast_log(LOG_DEBUG, "local SPI-C=0x%08x SPI-S=0x%08x\n", g_local_spi_s, g_local_spi_c);
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/* "Require: sec-agree" */
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@ -263,7 +386,8 @@ static pj_status_t on_tx_register_request(pjsip_tx_data *tdata)
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add_value_array_hdr(tdata, &STR_SUPPORTED, &STR_PATH);
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/* "Security-Client: ..." */
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add_value_array_hdr(tdata, &STR_SUPPORTED, &STR_SEC_AGREE);
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add_securety_client_hdr(tdata, ipsec_alg, ipsec_ealg, g_spi_c, g_spi_s, 43419, 42318);
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#warning fix port numbers
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add_securety_client_hdr(tdata, ipsec_alg, ipsec_ealg, g_local_spi_c, g_local_spi_s, 43419, 42318);
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#warning HACKING: Asterisk must do this on first register! Or we must do it!
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char xxx[] = "Digest uri=\"sip:ims.mnc001.mcc238.3gppnetwork.org\",username=\"238010000090828@ims.mnc001.mcc238.3gppnetwork.org\",response=\"\",realm=\"ims.mnc001.mcc238.3gppnetwork.org\",nonce=\"\"";
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@ -306,46 +430,40 @@ static pj_status_t on_tx_request(pjsip_tx_data *tdata)
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return PJ_SUCCESS;
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}
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static pj_bool_t on_rx_401_response(pjsip_rx_data *rdata)
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static pj_bool_t on_rx_401_407_response(pjsip_rx_data *rdata, pjsip_hdr_e auth_type)
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{
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pjsip_generic_string_hdr *hdr;
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if (!is_ims(rdata->msg_info.msg))
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return PJ_FALSE;
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/* Get Security-Server from header. */
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hdr = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &STR_SECURITY_SERVER, NULL);
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if (!hdr) {
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ast_log(LOG_ERROR, "Missing 'Security-Server' in REGISTER reply.");
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struct security_server sec;
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pjsip_generic_string_hdr *sec_hdr = pjsip_msg_find_hdr_by_name(rdata->msg_info.msg, &STR_SECURITY_SERVER, NULL);
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if (!sec_hdr || !sec_hdr->hvalue.ptr) {
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ast_log(LOG_ERROR, "Missing 'Security-Server' in REGISTER response.");
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return PJ_FALSE;
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}
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#if 0
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if (!hdr->count) {
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ast_log(LOG_ERROR, "Missing value in 'Security-Server' in REGISTER reply.");
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return PJ_CONSUME;
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parse_security_server(rdata->tp_info.pool, sec_hdr->hvalue.ptr, sec_hdr->hvalue.slen, &sec);
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if (!sec.prot.ptr || !sec.spi_c.ptr || !sec.spi_s.ptr || !sec.port_c.ptr || !sec.port_s.ptr || !sec.alg.ptr || !sec.ealg.ptr) {
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ast_log(LOG_ERROR, "Missing 'Security-Server' elements in REGISTER response. header=\"%.*s\", prot=%.*s, spi-c=%.*s, spi-s=%.*s, port-c=%.*s, port-s=%.*s, alg=%.*s, ealg=%.*s", fmt_str(sec_hdr->hvalue), fmt_str(sec.prot), fmt_str(sec.spi_c), fmt_str(sec.spi_s), fmt_str(sec.port_c), fmt_str(sec.port_s), fmt_str(sec.alg), fmt_str(sec.ealg));
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return PJ_FALSE;
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}
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#endif
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puts("1");
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printf("hurra: %s\n", hdr->hvalue.ptr);
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pjsip_www_authenticate_hdr *auth_hdr = pjsip_msg_find_hdr(rdata->msg_info.msg, PJSIP_H_WWW_AUTHENTICATE, NULL);
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pjsip_www_authenticate_hdr *auth_hdr = pjsip_msg_find_hdr(rdata->msg_info.msg, auth_type, NULL);
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if (!auth_hdr || !auth_hdr->challenge.digest.nonce.ptr || !auth_hdr->challenge.digest.algorithm.ptr) {
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ast_log(LOG_ERROR, "Authentication header missing or incomplete.\n");
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ast_log(LOG_ERROR, "Authentication header missing or incomplete in REGISTER response.\n");
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return PJ_FALSE;
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}
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printf("NONCE: %s\n", auth_hdr->challenge.digest.nonce.ptr);
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printf("algo: %s\n", auth_hdr->challenge.digest.algorithm.ptr);
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if (!strncmp(auth_hdr->challenge.digest.algorithm.ptr, "AKAv2-MD5", 9)) {
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if (!pj_strncmp2(&auth_hdr->challenge.digest.algorithm, "AKAv2-MD5", 9)) {
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ast_log(LOG_ERROR, "Authentication algorithm not supported. See third-party/pjproject/source/pjsip/src/pjsip/sip_auth_aka.c for implementation.\n");
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return PJ_FALSE;
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}
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if (!!strncmp(auth_hdr->challenge.digest.algorithm.ptr, "AKAv1-MD5", 9)) {
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if (!!pj_strncmp2(&auth_hdr->challenge.digest.algorithm, "AKAv1-MD5", 9)) {
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ast_log(LOG_ERROR, "Authentication algorithm not supported.\n");
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return PJ_FALSE;
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}
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#if 1
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#warning hacking
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const uint8_t opc[16] = { 0x77, 0x5A, 0x1F, 0x88, 0x7D, 0x2A, 0xD6, 0x6F, 0x97, 0x19, 0xC2, 0xC7, 0x9F, 0x84, 0x7B, 0x50 };
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const uint8_t ki[16] = { 0xD5, 0x34, 0xE0, 0x78, 0x54, 0xB7, 0x5E, 0x47, 0x5C, 0x66, 0x7A, 0x85, 0x6A, 0xA3, 0x1F, 0x9C };
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@ -360,14 +478,92 @@ static pj_bool_t on_rx_401_response(pjsip_rx_data *rdata)
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milenage_generate(opc, amf, ki, sqn, rand, out_autn, out_ik, out_ck, aka_res, &out_res_len);
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if (out_res_len != 8) {
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ast_log(LOG_ERROR, "Milenage computation failed.\n");
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return PJ_FALSE;
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}
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hexdump(LOG_DEBUG, "IK", out_ik, 16);
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hexdump(LOG_DEBUG, "CK", out_ck, 16);
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ast_log(LOG_ERROR, "Setting RES as paassword.\n");
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volte_auth = aka_res;
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#endif
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struct xfrm_algobuf auth_algo, ciph_algo;
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int i, j;
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int rc;
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for (i = 0; ipsec_alg[i].sip_name; i++) {
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if (!pj_strncmp2(&sec.alg, ipsec_alg[i].sip_name, strlen(ipsec_alg[i].sip_name)))
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break;
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}
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if (!ipsec_alg[i].kernel_name) {
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ast_log(LOG_ERROR, "Given 'alg' in Security-Server header not found.\n");
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return PJ_FALSE;
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}
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for (j = 0; ipsec_ealg[j].sip_name; j++) {
|
||||
if (!pj_strncmp2(&sec.ealg, ipsec_ealg[j].sip_name, strlen(ipsec_ealg[j].sip_name)))
|
||||
break;
|
||||
}
|
||||
g_remote_spi_c = atoi(sec.spi_c.ptr);
|
||||
g_remote_spi_s = atoi(sec.spi_s.ptr);
|
||||
ast_log(LOG_DEBUG, "remote SPI-C=0x%08x SPI-S=0x%08x\n", g_remote_spi_s, g_remote_spi_c);
|
||||
sockaddr_storage_port(&g_remote_addr_c, atoi(sec.port_c.ptr));
|
||||
sockaddr_storage_port(&g_remote_addr_s, atoi(sec.port_s.ptr));
|
||||
strcpy(auth_algo.algo.alg_name, ipsec_alg[i].kernel_name);
|
||||
switch (i) {
|
||||
case 0:
|
||||
memcpy(auth_algo.algo.alg_key, out_ik, 16);
|
||||
auth_algo.algo.alg_key_len = 16;
|
||||
break;
|
||||
case 1:
|
||||
memcpy(auth_algo.algo.alg_key, out_ik, 16);
|
||||
memset(auth_algo.algo.alg_key + 16, 0x00, 4);
|
||||
auth_algo.algo.alg_key_len = 20;
|
||||
break;
|
||||
}
|
||||
strcpy(ciph_algo.algo.alg_name, ipsec_ealg[j].kernel_name);
|
||||
switch (j) {
|
||||
case 0:
|
||||
ciph_algo.algo.alg_key_len = 0;
|
||||
break;
|
||||
}
|
||||
cleanup_xfrm();
|
||||
rc = xfrm_sa_add(g_mnl_socket, g_local_spi_c, (const struct sockaddr *)&g_local_addr_c, (const struct sockaddr *)&g_remote_addr_c, g_local_spi_c, &auth_algo.algo, &ciph_algo.algo);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SA.\n");
|
||||
else
|
||||
g_local_sa_c_set = PJ_TRUE;
|
||||
rc = xfrm_sa_add(g_mnl_socket, g_local_spi_s, (const struct sockaddr *)&g_local_addr_s, (const struct sockaddr *)&g_remote_addr_s, g_local_spi_s, &auth_algo.algo, &ciph_algo.algo);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SA.\n");
|
||||
else
|
||||
g_local_sa_s_set = PJ_TRUE;
|
||||
rc = xfrm_sa_add(g_mnl_socket, g_remote_spi_c, (const struct sockaddr *)&g_remote_addr_c, (const struct sockaddr *)&g_local_addr_c, g_remote_spi_c, &auth_algo.algo, &ciph_algo.algo);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SA.\n");
|
||||
else
|
||||
g_remote_sa_c_set = PJ_TRUE;
|
||||
rc = xfrm_sa_add(g_mnl_socket, g_remote_spi_s, (const struct sockaddr *)&g_remote_addr_s, (const struct sockaddr *)&g_local_addr_s, g_remote_spi_s, &auth_algo.algo, &ciph_algo.algo);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SA.\n");
|
||||
else
|
||||
g_remote_sa_s_set = PJ_TRUE;
|
||||
rc = xfrm_policy_add(g_mnl_socket, (const struct sockaddr *)&g_local_addr_c, (const struct sockaddr *)&g_remote_addr_c, g_local_spi_c, false);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SP.\n");
|
||||
else
|
||||
g_local_sp_c_set = PJ_TRUE;
|
||||
rc = xfrm_policy_add(g_mnl_socket, (const struct sockaddr *)&g_local_addr_s, (const struct sockaddr *)&g_remote_addr_s, g_local_spi_s, false);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SP.\n");
|
||||
else
|
||||
g_local_sp_s_set = PJ_TRUE;
|
||||
rc = xfrm_policy_add(g_mnl_socket, (const struct sockaddr *)&g_remote_addr_c, (const struct sockaddr *)&g_local_addr_c, g_remote_spi_c, true);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SP.\n");
|
||||
else
|
||||
g_remote_sp_c_set = PJ_TRUE;
|
||||
rc = xfrm_policy_add(g_mnl_socket, (const struct sockaddr *)&g_remote_addr_s, (const struct sockaddr *)&g_local_addr_s, g_remote_spi_s, true);
|
||||
if (rc < 0)
|
||||
ast_log(LOG_ERROR, "Failed to add IPSec SP.\n");
|
||||
else
|
||||
g_remote_sp_s_set = PJ_TRUE;
|
||||
|
||||
|
||||
return PJ_FALSE;
|
||||
|
|
@ -386,8 +582,9 @@ static pj_bool_t on_rx_response(pjsip_rx_data *rdata)
|
|||
|
||||
switch ((int)msg->line.req.method.id) {
|
||||
case 401:
|
||||
puts("401");
|
||||
return on_rx_401_response(rdata);
|
||||
return on_rx_401_407_response(rdata, PJSIP_H_WWW_AUTHENTICATE);
|
||||
case 407:
|
||||
return on_rx_401_407_response(rdata, PJSIP_H_PROXY_AUTHENTICATE);
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -9,7 +9,7 @@ struct mnl_socket;
|
|||
|
||||
struct xfrm_algobuf {
|
||||
struct xfrm_algo algo;
|
||||
uint8_t buf[sizeof(struct xfrm_algo) + 128];
|
||||
uint8_t buf[128];
|
||||
};
|
||||
|
||||
struct mnl_socket *xfrm_init_mnl_socket(void);
|
||||
|
|
|
|||
Loading…
Reference in New Issue