229 lines
6.6 KiB
C
229 lines
6.6 KiB
C
/* (C) 2015 by Harald Welte <laforge@gnumonks.org>
|
|
*
|
|
* All Rights Reserved
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
#include <errno.h>
|
|
|
|
#include <osmocom/core/utils.h>
|
|
#include <osmocom/crypt/auth.h>
|
|
|
|
#include <sqlite3.h>
|
|
|
|
#include "logging.h"
|
|
#include "db.h"
|
|
#include "auc.h"
|
|
#include "rand.h"
|
|
|
|
#define LOGAUC(imsi, level, fmt, args ...) LOGP(DAUC, level, "IMSI='%s': " fmt, imsi, ## args)
|
|
|
|
/* update the SQN for a given subscriber ID */
|
|
int db_update_sqn(struct db_context *dbc, int64_t subscr_id, uint64_t new_sqn)
|
|
{
|
|
sqlite3_stmt *stmt = dbc->stmt[DB_STMT_AUC_UPD_SQN];
|
|
int rc;
|
|
int ret = 0;
|
|
|
|
if (!db_bind_int64(stmt, "$sqn", new_sqn))
|
|
return -EIO;
|
|
|
|
if (!db_bind_int64(stmt, "$subscriber_id", subscr_id))
|
|
return -EIO;
|
|
|
|
/* execute the statement */
|
|
rc = sqlite3_step(stmt);
|
|
if (rc != SQLITE_DONE) {
|
|
LOGP(DAUC, LOGL_ERROR, "Cannot update SQN for subscriber ID=%" PRId64
|
|
": SQL error: (%d) %s\n",
|
|
subscr_id, rc, sqlite3_errmsg(dbc->db));
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
/* verify execution result */
|
|
rc = sqlite3_changes(dbc->db);
|
|
if (!rc) {
|
|
LOGP(DAUC, LOGL_ERROR, "Cannot update SQN for subscriber ID=%" PRId64
|
|
": no auc_3g entry for such subscriber\n", subscr_id);
|
|
ret = -ENOENT;
|
|
} else if (rc != 1) {
|
|
LOGP(DAUC, LOGL_ERROR, "Update SQN for subscriber ID=%" PRId64
|
|
": SQL modified %d rows (expected 1)\n", subscr_id, rc);
|
|
ret = -EIO;
|
|
}
|
|
|
|
out:
|
|
db_remove_reset(stmt);
|
|
return ret;
|
|
}
|
|
|
|
/* obtain the authentication data for a given imsi
|
|
* returns 0 for success, negative value on error:
|
|
* -ENOENT if the IMSI is not known, -ENOKEY if the IMSI is known but has no auth data,
|
|
* -EIO on db failure */
|
|
int db_get_auth_data(struct db_context *dbc, const char *imsi,
|
|
struct osmo_sub_auth_data *aud2g,
|
|
struct osmo_sub_auth_data *aud3g,
|
|
int64_t *subscr_id)
|
|
{
|
|
sqlite3_stmt *stmt = dbc->stmt[DB_STMT_AUC_BY_IMSI];
|
|
int ret = 0;
|
|
int rc;
|
|
|
|
memset(aud2g, 0, sizeof(*aud2g));
|
|
memset(aud3g, 0, sizeof(*aud3g));
|
|
|
|
if (!db_bind_text(stmt, "$imsi", imsi))
|
|
return -EIO;
|
|
|
|
/* execute the statement */
|
|
rc = sqlite3_step(stmt);
|
|
if (rc == SQLITE_DONE) {
|
|
LOGAUC(imsi, LOGL_INFO, "No such subscriber\n");
|
|
ret = -ENOENT;
|
|
goto out;
|
|
} else if (rc != SQLITE_ROW) {
|
|
LOGAUC(imsi, LOGL_ERROR, "Error executing SQL: %d\n", rc);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
/* as an optimization, we retrieve the subscriber ID, to ensure we can
|
|
* update the SQN later without having to go back via a JOIN with the
|
|
* subscriber table. */
|
|
if (subscr_id)
|
|
*subscr_id = sqlite3_column_int64(stmt, 0);
|
|
|
|
/* obtain result values using sqlite3_column_*() */
|
|
if (sqlite3_column_type(stmt, 1) == SQLITE_INTEGER) {
|
|
/* we do have some 2G authentication data */
|
|
const uint8_t *ki;
|
|
|
|
aud2g->algo = sqlite3_column_int(stmt, 1);
|
|
ki = sqlite3_column_text(stmt, 2);
|
|
#if 0
|
|
if (sqlite3_column_bytes(stmt, 2) != sizeof(aud2g->u.gsm.ki)) {
|
|
LOGAUC(imsi, LOGL_ERROR, "Error reading Ki: %d\n", rc);
|
|
goto end_2g;
|
|
}
|
|
#endif
|
|
osmo_hexparse((void*)ki, (void*)&aud2g->u.gsm.ki, sizeof(aud2g->u.gsm.ki));
|
|
aud2g->type = OSMO_AUTH_TYPE_GSM;
|
|
} else
|
|
LOGAUC(imsi, LOGL_DEBUG, "No 2G Auth Data\n");
|
|
//end_2g:
|
|
if (sqlite3_column_type(stmt, 3) == SQLITE_INTEGER) {
|
|
/* we do have some 3G authentication data */
|
|
const uint8_t *k, *op, *opc;
|
|
|
|
aud3g->algo = sqlite3_column_int(stmt, 3);
|
|
k = sqlite3_column_text(stmt, 4);
|
|
if (!k) {
|
|
LOGAUC(imsi, LOGL_ERROR, "Error reading K: %d\n", rc);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
osmo_hexparse((void*)k, (void*)&aud3g->u.umts.k, sizeof(aud3g->u.umts.k));
|
|
/* UMTS Subscribers can have either OP or OPC */
|
|
op = sqlite3_column_text(stmt, 5);
|
|
if (!op) {
|
|
opc = sqlite3_column_text(stmt, 6);
|
|
if (!opc) {
|
|
LOGAUC(imsi, LOGL_ERROR, "Error reading OPC: %d\n", rc);
|
|
ret = -EIO;
|
|
goto out;
|
|
}
|
|
osmo_hexparse((void*)opc, (void*)&aud3g->u.umts.opc,
|
|
sizeof(aud3g->u.umts.opc));
|
|
aud3g->u.umts.opc_is_op = 0;
|
|
} else {
|
|
osmo_hexparse((void*)op, (void*)&aud3g->u.umts.opc,
|
|
sizeof(aud3g->u.umts.opc));
|
|
aud3g->u.umts.opc_is_op = 1;
|
|
}
|
|
aud3g->u.umts.sqn = sqlite3_column_int64(stmt, 7);
|
|
aud3g->u.umts.ind_bitlen = sqlite3_column_int(stmt, 8);
|
|
/* FIXME: amf? */
|
|
aud3g->type = OSMO_AUTH_TYPE_UMTS;
|
|
} else
|
|
LOGAUC(imsi, LOGL_DEBUG, "No 3G Auth Data\n");
|
|
|
|
if (aud2g->type == 0 && aud3g->type == 0)
|
|
ret = -ENOKEY;
|
|
|
|
out:
|
|
db_remove_reset(stmt);
|
|
return ret;
|
|
}
|
|
|
|
/* return number of vectors generated, negative value on error:
|
|
* -ENOENT if the IMSI is not known, -ENOKEY if the IMSI is known but has no auth data,
|
|
* -EIO on db failure */
|
|
int db_get_auc(struct db_context *dbc, const char *imsi,
|
|
unsigned int auc_3g_ind, struct osmo_auth_vector *vec,
|
|
unsigned int num_vec, const uint8_t *rand_auts,
|
|
const uint8_t *auts)
|
|
{
|
|
struct osmo_sub_auth_data aud2g, aud3g;
|
|
int64_t subscr_id;
|
|
int ret = 0;
|
|
int rc;
|
|
|
|
rc = db_get_auth_data(dbc, imsi, &aud2g, &aud3g, &subscr_id);
|
|
if (rc)
|
|
return rc;
|
|
|
|
aud3g.u.umts.ind = auc_3g_ind;
|
|
if (aud3g.type == OSMO_AUTH_TYPE_UMTS
|
|
&& aud3g.u.umts.ind >= (1U << aud3g.u.umts.ind_bitlen)) {
|
|
LOGAUC(imsi, LOGL_NOTICE, "3G auth: SQN's IND bitlen %u is"
|
|
" too small to hold an index of %u. Truncating. This"
|
|
" may cause numerous additional AUTS resyncing.\n",
|
|
aud3g.u.umts.ind_bitlen, aud3g.u.umts.ind);
|
|
aud3g.u.umts.ind &= (1U << aud3g.u.umts.ind_bitlen) - 1;
|
|
}
|
|
|
|
LOGAUC(imsi, LOGL_DEBUG, "Calling to generate %u vectors\n", num_vec);
|
|
rc = auc_compute_vectors(vec, num_vec, &aud2g, &aud3g, rand_auts, auts);
|
|
if (rc < 0) {
|
|
num_vec = 0;
|
|
ret = -1;
|
|
} else {
|
|
num_vec = rc;
|
|
ret = num_vec;
|
|
}
|
|
LOGAUC(imsi, LOGL_INFO, "Generated %u vectors\n", num_vec);
|
|
|
|
/* Update SQN in database, as needed */
|
|
if (aud3g.algo) {
|
|
LOGAUC(imsi, LOGL_DEBUG, "Updating SQN=%" PRIu64 " in DB\n",
|
|
aud3g.u.umts.sqn);
|
|
rc = db_update_sqn(dbc, subscr_id, aud3g.u.umts.sqn);
|
|
/* don't tell caller we generated any triplets in case of
|
|
* update error */
|
|
if (rc < 0) {
|
|
LOGAUC(imsi, LOGL_ERROR, "Error updating SQN: %d\n", rc);
|
|
num_vec = 0;
|
|
ret = -1;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|