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https://github.com/vanhoefm/fragattacks.git
synced 2024-11-28 18:28:23 -05:00
hlr_auc_gw: Add support for processing command line operations
This allows hlr_auc_gw to be used to run a single operation without having to use it as a server. This can be useful, e.g., for generating GSM authentication triplets for external programs. For example: ./hlr_auc_gw -m hlr_auc_gw.milenage_db "SIM-REQ-AUTH 232010000000000" Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen
parent
2b5b875f34
commit
3e6547b5e8
@ -62,6 +62,7 @@ static char *milenage_file = NULL;
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static int update_milenage = 0;
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static int sqn_changes = 0;
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static int ind_len = 5;
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static int stdout_debug = 1;
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/* GSM triplets */
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struct gsm_triplet {
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@ -218,6 +219,9 @@ static int db_update_milenage_sqn(struct milenage_parameters *m)
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{
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char cmd[128], val[13], *pos;
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if (sqlite_db == NULL)
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return 0;
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pos = val;
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pos += wpa_snprintf_hex(pos, sizeof(val), m->sqn, 6);
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*pos = '\0';
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@ -615,16 +619,15 @@ static struct milenage_parameters * get_milenage(const char *imsi)
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}
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static void sim_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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char *imsi)
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static int sim_req_auth(char *imsi, char *resp, size_t resp_len)
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{
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int count, max_chal, ret;
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char *pos;
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char reply[1000], *rpos, *rend;
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char *rpos, *rend;
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struct milenage_parameters *m;
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struct gsm_triplet *g;
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reply[0] = '\0';
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resp[0] = '\0';
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pos = strchr(imsi, ' ');
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if (pos) {
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@ -635,11 +638,11 @@ static void sim_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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} else
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max_chal = EAP_SIM_MAX_CHAL;
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rend = &reply[sizeof(reply)];
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rpos = reply;
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rend = resp + resp_len;
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rpos = resp;
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ret = snprintf(rpos, rend - rpos, "SIM-RESP-AUTH %s", imsi);
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if (ret < 0 || ret >= rend - rpos)
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return;
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return -1;
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rpos += ret;
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m = get_milenage(imsi);
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@ -647,7 +650,7 @@ static void sim_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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u8 _rand[16], sres[4], kc[8];
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for (count = 0; count < max_chal; count++) {
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if (random_get_bytes(_rand, 16) < 0)
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return;
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return -1;
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gsm_milenage(m->opc, m->ki, _rand, sres, kc);
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*rpos++ = ' ';
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rpos += wpa_snprintf_hex(rpos, rend - rpos, kc, 8);
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@ -657,7 +660,7 @@ static void sim_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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rpos += wpa_snprintf_hex(rpos, rend - rpos, _rand, 16);
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}
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*rpos = '\0';
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goto send;
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return 0;
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}
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count = 0;
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@ -681,15 +684,11 @@ static void sim_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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printf("No GSM triplets found for %s\n", imsi);
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ret = snprintf(rpos, rend - rpos, " FAILURE");
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if (ret < 0 || ret >= rend - rpos)
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return;
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return -1;
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rpos += ret;
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}
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send:
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printf("Send: %s\n", reply);
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if (sendto(s, reply, rpos - reply, 0,
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(struct sockaddr *) from, fromlen) < 0)
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perror("send");
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return 0;
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}
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@ -715,11 +714,10 @@ static void inc_sqn(u8 *sqn)
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}
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static void aka_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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char *imsi)
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static int aka_req_auth(char *imsi, char *resp, size_t resp_len)
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{
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/* AKA-RESP-AUTH <IMSI> <RAND> <AUTN> <IK> <CK> <RES> */
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char reply[1000], *pos, *end;
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char *pos, *end;
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u8 _rand[EAP_AKA_RAND_LEN];
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u8 autn[EAP_AKA_AUTN_LEN];
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u8 ik[EAP_AKA_IK_LEN];
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@ -733,16 +731,18 @@ static void aka_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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m = get_milenage(imsi);
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if (m) {
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if (random_get_bytes(_rand, EAP_AKA_RAND_LEN) < 0)
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return;
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return -1;
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res_len = EAP_AKA_RES_MAX_LEN;
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inc_sqn(m->sqn);
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#ifdef CONFIG_SQLITE
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db_update_milenage_sqn(m);
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#endif /* CONFIG_SQLITE */
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sqn_changes = 1;
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if (stdout_debug) {
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printf("AKA: Milenage with SQN=%02x%02x%02x%02x%02x%02x\n",
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m->sqn[0], m->sqn[1], m->sqn[2],
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m->sqn[3], m->sqn[4], m->sqn[5]);
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}
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milenage_generate(m->opc, m->amf, m->ki, m->sqn, _rand,
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autn, ik, ck, res, &res_len);
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} else {
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@ -760,18 +760,18 @@ static void aka_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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#endif /* AKA_USE_FIXED_TEST_VALUES */
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}
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pos = reply;
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end = &reply[sizeof(reply)];
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pos = resp;
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end = resp + resp_len;
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ret = snprintf(pos, end - pos, "AKA-RESP-AUTH %s ", imsi);
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if (ret < 0 || ret >= end - pos)
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return;
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return -1;
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pos += ret;
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if (failed) {
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ret = snprintf(pos, end - pos, "FAILURE");
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if (ret < 0 || ret >= end - pos)
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return;
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return -1;
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pos += ret;
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goto done;
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return 0;
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}
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pos += wpa_snprintf_hex(pos, end - pos, _rand, EAP_AKA_RAND_LEN);
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*pos++ = ' ';
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@ -783,65 +783,84 @@ static void aka_req_auth(int s, struct sockaddr_un *from, socklen_t fromlen,
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*pos++ = ' ';
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pos += wpa_snprintf_hex(pos, end - pos, res, res_len);
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done:
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printf("Send: %s\n", reply);
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if (sendto(s, reply, pos - reply, 0, (struct sockaddr *) from,
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fromlen) < 0)
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perror("send");
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return 0;
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}
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static void aka_auts(int s, struct sockaddr_un *from, socklen_t fromlen,
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char *imsi)
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static int aka_auts(char *imsi, char *resp, size_t resp_len)
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{
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char *auts, *__rand;
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u8 _auts[EAP_AKA_AUTS_LEN], _rand[EAP_AKA_RAND_LEN], sqn[6];
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struct milenage_parameters *m;
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resp[0] = '\0';
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/* AKA-AUTS <IMSI> <AUTS> <RAND> */
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auts = strchr(imsi, ' ');
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if (auts == NULL)
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return;
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return -1;
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*auts++ = '\0';
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__rand = strchr(auts, ' ');
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if (__rand == NULL)
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return;
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return -1;
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*__rand++ = '\0';
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printf("AKA-AUTS: IMSI=%s AUTS=%s RAND=%s\n", imsi, auts, __rand);
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if (stdout_debug) {
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printf("AKA-AUTS: IMSI=%s AUTS=%s RAND=%s\n",
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imsi, auts, __rand);
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}
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if (hexstr2bin(auts, _auts, EAP_AKA_AUTS_LEN) ||
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hexstr2bin(__rand, _rand, EAP_AKA_RAND_LEN)) {
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printf("Could not parse AUTS/RAND\n");
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return;
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return -1;
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}
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m = get_milenage(imsi);
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if (m == NULL) {
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printf("Unknown IMSI: %s\n", imsi);
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return;
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return -1;
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}
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if (milenage_auts(m->opc, m->ki, _rand, _auts, sqn)) {
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printf("AKA-AUTS: Incorrect MAC-S\n");
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} else {
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memcpy(m->sqn, sqn, 6);
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if (stdout_debug) {
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printf("AKA-AUTS: Re-synchronized: "
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"SQN=%02x%02x%02x%02x%02x%02x\n",
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sqn[0], sqn[1], sqn[2], sqn[3], sqn[4], sqn[5]);
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}
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#ifdef CONFIG_SQLITE
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db_update_milenage_sqn(m);
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#endif /* CONFIG_SQLITE */
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sqn_changes = 1;
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}
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return 0;
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}
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static int process_cmd(char *cmd, char *resp, size_t resp_len)
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{
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if (os_strncmp(cmd, "SIM-REQ-AUTH ", 13) == 0)
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return sim_req_auth(cmd + 13, resp, resp_len);
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if (os_strncmp(cmd, "AKA-REQ-AUTH ", 13) == 0)
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return aka_req_auth(cmd + 13, resp, resp_len);
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if (os_strncmp(cmd, "AKA-AUTS ", 9) == 0)
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return aka_auts(cmd + 9, resp, resp_len);
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printf("Unknown request: %s\n", cmd);
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return -1;
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}
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static int process(int s)
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{
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char buf[1000];
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char buf[1000], resp[1000];
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struct sockaddr_un from;
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socklen_t fromlen;
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ssize_t res;
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@ -863,14 +882,21 @@ static int process(int s)
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printf("Received: %s\n", buf);
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if (strncmp(buf, "SIM-REQ-AUTH ", 13) == 0)
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sim_req_auth(s, &from, fromlen, buf + 13);
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else if (strncmp(buf, "AKA-REQ-AUTH ", 13) == 0)
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aka_req_auth(s, &from, fromlen, buf + 13);
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else if (strncmp(buf, "AKA-AUTS ", 9) == 0)
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aka_auts(s, &from, fromlen, buf + 9);
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else
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printf("Unknown request: %s\n", buf);
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if (process_cmd(buf, resp, sizeof(resp)) < 0) {
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printf("Failed to process request\n");
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return -1;
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}
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if (resp[0] == '\0') {
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printf("No response\n");
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return 0;
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}
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printf("Send: %s\n", resp);
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if (sendto(s, resp, os_strlen(resp), 0, (struct sockaddr *) &from,
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fromlen) < 0)
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perror("send");
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return 0;
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}
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@ -898,7 +924,9 @@ static void cleanup(void)
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os_free(prev);
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}
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if (serv_sock >= 0)
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close(serv_sock);
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if (socket_path)
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unlink(socket_path);
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#ifdef CONFIG_SQLITE
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@ -926,7 +954,7 @@ static void usage(void)
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"usage:\n"
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"hlr_auc_gw [-hu] [-s<socket path>] [-g<triplet file>] "
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"[-m<milenage file>] \\\n"
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" [-D<DB file>] [-i<IND len in bits>]\n"
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" [-D<DB file>] [-i<IND len in bits>] [command]\n"
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"\n"
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"options:\n"
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" -h = show this usage help\n"
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@ -936,7 +964,15 @@ static void usage(void)
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" -g<triplet file> = path for GSM authentication triplets\n"
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" -m<milenage file> = path for Milenage keys\n"
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" -D<DB file> = path to SQLite database\n"
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" -i<IND len in bits> = IND length for SQN (default: 5)\n",
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" -i<IND len in bits> = IND length for SQN (default: 5)\n"
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"\n"
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"If the optional command argument, like "
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"\"AKA-REQ-AUTH <IMSI>\" is used, a single\n"
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"command is processed with response sent to stdout. Otherwise, "
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"hlr_auc_gw opens\n"
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"a control interface and processes commands sent through it "
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"(e.g., by EAP server\n"
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"in hostapd).\n",
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default_socket_path);
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}
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@ -946,6 +982,7 @@ int main(int argc, char *argv[])
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int c;
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char *gsm_triplet_file = NULL;
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char *sqlite_db_file = NULL;
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int ret = 0;
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if (os_program_init())
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return -1;
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@ -1009,6 +1046,7 @@ int main(int argc, char *argv[])
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if (milenage_file && read_milenage(milenage_file) < 0)
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return -1;
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if (optind == argc) {
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serv_sock = open_socket(socket_path);
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if (serv_sock < 0)
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return -1;
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@ -1021,6 +1059,18 @@ int main(int argc, char *argv[])
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for (;;)
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process(serv_sock);
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} else {
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char buf[1000];
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socket_path = NULL;
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stdout_debug = 0;
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if (process_cmd(argv[optind], buf, sizeof(buf)) < 0) {
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printf("FAIL\n");
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ret = -1;
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} else {
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printf("%s\n", buf);
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}
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cleanup();
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}
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#ifdef CONFIG_SQLITE
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if (sqlite_db) {
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@ -1031,5 +1081,5 @@ int main(int argc, char *argv[])
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os_program_deinit();
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return 0;
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return ret;
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}
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