2016-04-28 05:18:49 +00:00
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/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <string.h>
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2017-03-16 04:20:50 +00:00
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#include <inttypes.h>
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2016-04-28 05:18:49 +00:00
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#include <osmocom/core/utils.h>
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#include <osmocom/crypt/auth.h>
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#include <sqlite3.h>
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#include "logging.h"
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#include "db.h"
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#include "auc.h"
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#include "rand.h"
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2017-10-09 15:56:04 +00:00
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#define LOGAUC(imsi, level, fmt, args ...) LOGP(DAUC, level, "IMSI='%s': " fmt, imsi, ## args)
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2016-04-28 05:18:49 +00:00
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/* update the SQN for a given subscriber ID */
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int db_update_sqn(struct db_context *dbc, uint64_t id,
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uint64_t new_sqn)
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{
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2017-10-06 01:09:34 +00:00
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sqlite3_stmt *stmt = dbc->stmt[DB_STMT_AUC_UPD_SQN];
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2016-04-28 05:18:49 +00:00
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int rc;
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/* bind new SQN and subscriber ID */
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rc = sqlite3_bind_int64(stmt, 1, new_sqn);
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if (rc != SQLITE_OK) {
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LOGP(DAUC, LOGL_ERROR, "Error binding SQN: %d\n", rc);
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return -1;
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}
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rc = sqlite3_bind_int64(stmt, 2, id);
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if (rc != SQLITE_OK) {
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LOGP(DAUC, LOGL_ERROR, "Error binding Subscrber ID: %d\n", rc);
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return -1;
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}
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/* execute the statement */
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rc = sqlite3_step(stmt);
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if (rc != SQLITE_DONE) {
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LOGP(DAUC, LOGL_ERROR, "Error updating SQN: %d\n", rc);
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return -2;
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}
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/* remove bindings and reset statement to be re-executed */
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rc = sqlite3_clear_bindings(stmt);
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if (rc != SQLITE_OK) {
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LOGP(DAUC, LOGL_ERROR, "Error clerearing bindings: %d\n", rc);
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}
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rc = sqlite3_reset(stmt);
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if (rc != SQLITE_OK) {
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LOGP(DAUC, LOGL_ERROR, "Error in sqlite3_reset: %d\n", rc);
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}
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return 0;
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}
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2016-05-05 14:38:14 +00:00
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/* obtain the authentication data for a given imsi
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* returns -1 in case of error, 0 for unknown IMSI, 1 for success */
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2016-04-28 05:18:49 +00:00
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int db_get_auth_data(struct db_context *dbc, const char *imsi,
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struct osmo_sub_auth_data *aud2g,
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struct osmo_sub_auth_data *aud3g,
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uint64_t *subscr_id)
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{
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2017-10-06 01:09:34 +00:00
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sqlite3_stmt *stmt = dbc->stmt[DB_STMT_AUC_BY_IMSI];
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2016-05-05 14:38:14 +00:00
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int ret = 0;
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2016-04-28 05:18:49 +00:00
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int rc;
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memset(aud2g, 0, sizeof(*aud2g));
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memset(aud3g, 0, sizeof(*aud3g));
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/* bind the IMSI value */
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rc = sqlite3_bind_text(stmt, 1, imsi, -1,
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SQLITE_STATIC);
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if (rc != SQLITE_OK) {
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LOGAUC(imsi, LOGL_ERROR, "Error binding IMSI: %d\n", rc);
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2016-05-05 14:38:14 +00:00
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ret = -1;
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goto out;
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2016-04-28 05:18:49 +00:00
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}
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/* execute the statement */
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rc = sqlite3_step(stmt);
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2016-05-05 14:38:14 +00:00
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if (rc == SQLITE_DONE) {
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2017-10-09 15:56:04 +00:00
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LOGAUC(imsi, LOGL_INFO, "No such subscriber\n");
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2016-05-05 14:38:14 +00:00
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ret = 0;
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goto out;
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} else if (rc != SQLITE_ROW) {
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2016-04-28 05:18:49 +00:00
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LOGAUC(imsi, LOGL_ERROR, "Error executing SQL: %d\n", rc);
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2016-05-05 14:38:14 +00:00
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ret = -1;
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2016-04-28 05:18:49 +00:00
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goto out;
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}
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/* as an optimization, we retrieve the subscriber ID, to ensure we can
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* update the SQN later without having to go back via a JOIN with the
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* subscriber table. */
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if (subscr_id)
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*subscr_id = sqlite3_column_int64(stmt, 0);
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/* obtain result values using sqlite3_column_*() */
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if (sqlite3_column_type(stmt, 1) == SQLITE_INTEGER) {
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/* we do have some 2G authentication data */
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const uint8_t *ki;
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aud2g->algo = sqlite3_column_int(stmt, 1);
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ki = sqlite3_column_text(stmt, 2);
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#if 0
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if (sqlite3_column_bytes(stmt, 2) != sizeof(aud2g->u.gsm.ki)) {
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LOGAUC(imsi, LOGL_ERROR, "Error reading Ki: %d\n", rc);
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goto end_2g;
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}
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#endif
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2016-12-11 00:22:23 +00:00
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osmo_hexparse((void*)ki, (void*)&aud2g->u.gsm.ki, sizeof(aud2g->u.gsm.ki));
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2016-04-28 05:18:49 +00:00
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aud2g->type = OSMO_AUTH_TYPE_GSM;
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} else
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LOGAUC(imsi, LOGL_DEBUG, "No 2G Auth Data\n");
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//end_2g:
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if (sqlite3_column_type(stmt, 3) == SQLITE_INTEGER) {
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/* we do have some 3G authentication data */
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const uint8_t *k, *op, *opc;
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aud3g->algo = sqlite3_column_int(stmt, 3);
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k = sqlite3_column_text(stmt, 4);
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if (!k) {
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LOGAUC(imsi, LOGL_ERROR, "Error reading K: %d\n", rc);
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goto out;
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}
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2016-12-11 00:22:23 +00:00
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osmo_hexparse((void*)k, (void*)&aud3g->u.umts.k, sizeof(aud3g->u.umts.k));
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2016-04-28 05:18:49 +00:00
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/* UMTS Subscribers can have either OP or OPC */
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op = sqlite3_column_text(stmt, 5);
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if (!op) {
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opc = sqlite3_column_text(stmt, 6);
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if (!opc) {
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LOGAUC(imsi, LOGL_ERROR, "Error reading OPC: %d\n", rc);
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goto out;
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}
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2016-12-11 00:22:23 +00:00
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osmo_hexparse((void*)opc, (void*)&aud3g->u.umts.opc,
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2016-05-05 15:07:17 +00:00
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sizeof(aud3g->u.umts.opc));
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2016-04-28 05:18:49 +00:00
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aud3g->u.umts.opc_is_op = 0;
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} else {
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2016-12-11 00:22:23 +00:00
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osmo_hexparse((void*)op, (void*)&aud3g->u.umts.opc,
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2016-05-05 15:07:17 +00:00
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sizeof(aud3g->u.umts.opc));
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2016-04-28 05:18:49 +00:00
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aud3g->u.umts.opc_is_op = 1;
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}
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aud3g->u.umts.sqn = sqlite3_column_int64(stmt, 7);
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2017-03-14 23:07:43 +00:00
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aud3g->u.umts.ind_bitlen = sqlite3_column_int(stmt, 8);
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2016-04-28 05:18:49 +00:00
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/* FIXME: amf? */
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aud3g->type = OSMO_AUTH_TYPE_UMTS;
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} else
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LOGAUC(imsi, LOGL_DEBUG, "No 3G Auth Data\n");
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2016-05-05 14:38:14 +00:00
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if (aud2g->type == 0 && aud3g->type == 0)
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ret = -1;
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else
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ret = 1;
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2016-04-28 05:18:49 +00:00
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out:
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/* remove bindings and reset statement to be re-executed */
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rc = sqlite3_clear_bindings(stmt);
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if (rc != SQLITE_OK) {
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LOGAUC(imsi, LOGL_ERROR, "Error in sqlite3_clear_bindings(): %d\n", rc);
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}
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rc = sqlite3_reset(stmt);
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if (rc != SQLITE_OK) {
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LOGAUC(imsi, LOGL_ERROR, "Error in sqlite3_reset(): %d\n", rc);
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}
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2016-05-05 14:38:14 +00:00
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return ret;
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2016-04-28 05:18:49 +00:00
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}
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2016-05-05 14:38:14 +00:00
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/* return -1 in case of error, 0 for unknown imsi, positive for number
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* of vectors generated */
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2016-04-28 05:18:49 +00:00
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int db_get_auc(struct db_context *dbc, const char *imsi,
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2017-03-14 23:07:43 +00:00
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unsigned int auc_3g_ind, struct osmo_auth_vector *vec,
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unsigned int num_vec, const uint8_t *rand_auts,
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const uint8_t *auts)
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2016-04-28 05:18:49 +00:00
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{
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struct osmo_sub_auth_data aud2g, aud3g;
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uint64_t subscr_id;
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2016-05-05 14:38:14 +00:00
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int ret = 0;
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2016-04-28 05:18:49 +00:00
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int rc;
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rc = db_get_auth_data(dbc, imsi, &aud2g, &aud3g, &subscr_id);
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2016-05-05 14:38:14 +00:00
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if (rc <= 0)
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2016-04-28 05:18:49 +00:00
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return rc;
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2017-03-14 23:07:43 +00:00
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aud3g.u.umts.ind = auc_3g_ind;
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if (aud3g.type == OSMO_AUTH_TYPE_UMTS
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&& aud3g.u.umts.ind >= (1U << aud3g.u.umts.ind_bitlen)) {
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LOGAUC(imsi, LOGL_NOTICE, "3G auth: SQN's IND bitlen %u is"
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" too small to hold an index of %u. Truncating. This"
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" may cause numerous additional AUTS resyncing.\n",
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aud3g.u.umts.ind_bitlen, aud3g.u.umts.ind);
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aud3g.u.umts.ind &= (1U << aud3g.u.umts.ind_bitlen) - 1;
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}
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2016-12-16 15:11:36 +00:00
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LOGAUC(imsi, LOGL_DEBUG, "Calling to generate %u vectors\n", num_vec);
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2016-04-28 05:18:49 +00:00
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rc = auc_compute_vectors(vec, num_vec, &aud2g, &aud3g, rand_auts, auts);
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2016-05-05 14:38:14 +00:00
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if (rc < 0) {
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2016-04-28 05:18:49 +00:00
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num_vec = 0;
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2016-05-05 14:38:14 +00:00
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ret = -1;
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} else {
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2016-04-28 05:18:49 +00:00
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num_vec = rc;
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2016-05-05 14:38:14 +00:00
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ret = num_vec;
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}
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2016-04-28 05:18:49 +00:00
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LOGAUC(imsi, LOGL_INFO, "Generated %u vectors\n", num_vec);
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/* Update SQN in database, as needed */
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if (aud3g.algo) {
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2017-03-16 03:58:58 +00:00
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LOGAUC(imsi, LOGL_DEBUG, "Updating SQN=%" PRIu64 " in DB\n",
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aud3g.u.umts.sqn);
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2016-04-28 05:18:49 +00:00
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rc = db_update_sqn(dbc, subscr_id, aud3g.u.umts.sqn);
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/* don't tell caller we generated any triplets in case of
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* update error */
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if (rc < 0) {
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LOGAUC(imsi, LOGL_ERROR, "Error updating SQN: %d\n", rc);
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num_vec = 0;
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2016-05-05 14:38:14 +00:00
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ret = -1;
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2016-04-28 05:18:49 +00:00
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}
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}
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2016-05-05 14:38:14 +00:00
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return ret;
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2016-04-28 05:18:49 +00:00
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}
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