diff options
Diffstat (limited to 'osmo-gsup-hlr/src/db_auc.c')
| -rw-r--r-- | osmo-gsup-hlr/src/db_auc.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/osmo-gsup-hlr/src/db_auc.c b/osmo-gsup-hlr/src/db_auc.c new file mode 100644 index 0000000..fa5f3e5 --- /dev/null +++ b/osmo-gsup-hlr/src/db_auc.c @@ -0,0 +1,208 @@ +/* (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 <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, "%s: " fmt, imsi, ## args) + +/* update the SQN for a given subscriber ID */ +int db_update_sqn(struct db_context *dbc, uint64_t id, + uint64_t new_sqn) +{ + sqlite3_stmt *stmt = dbc->stmt[AUC_UPD_SQN]; + int rc; + + /* bind new SQN and subscriber ID */ + rc = sqlite3_bind_int64(stmt, 1, new_sqn); + if (rc != SQLITE_OK) { + LOGP(DAUC, LOGL_ERROR, "Error binding SQN: %d\n", rc); + return -1; + } + + rc = sqlite3_bind_int64(stmt, 2, id); + if (rc != SQLITE_OK) { + LOGP(DAUC, LOGL_ERROR, "Error binding Subscrber ID: %d\n", rc); + return -1; + } + + /* execute the statement */ + rc = sqlite3_step(stmt); + if (rc != SQLITE_DONE) { + LOGP(DAUC, LOGL_ERROR, "Error updating SQN: %d\n", rc); + return -2; + } + + /* remove bindings and reset statement to be re-executed */ + rc = sqlite3_clear_bindings(stmt); + if (rc != SQLITE_OK) { + LOGP(DAUC, LOGL_ERROR, "Error clerearing bindings: %d\n", rc); + } + rc = sqlite3_reset(stmt); + if (rc != SQLITE_OK) { + LOGP(DAUC, LOGL_ERROR, "Error in sqlite3_reset: %d\n", rc); + } + + return 0; +} + +/* obtain the authentication data for a given imsi */ +int db_get_auth_data(struct db_context *dbc, const char *imsi, + struct osmo_sub_auth_data *aud2g, + struct osmo_sub_auth_data *aud3g, + uint64_t *subscr_id) +{ + sqlite3_stmt *stmt = dbc->stmt[AUC_BY_IMSI]; + int rc; + + memset(aud2g, 0, sizeof(*aud2g)); + memset(aud3g, 0, sizeof(*aud3g)); + + /* bind the IMSI value */ + rc = sqlite3_bind_text(stmt, 1, imsi, -1, + SQLITE_STATIC); + if (rc != SQLITE_OK) { + LOGAUC(imsi, LOGL_ERROR, "Error binding IMSI: %d\n", rc); + } + + /* execute the statement */ + rc = sqlite3_step(stmt); + if (rc != SQLITE_ROW) { + LOGAUC(imsi, LOGL_ERROR, "Error executing SQL: %d\n", rc); + 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); + + for (int i = 0; i < 10; i++) + LOGAUC(imsi, LOGL_DEBUG, "col_type(%d)=%d\n", i, + sqlite3_column_type(stmt, i)); + + /* 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 + memcpy(&aud2g->u.gsm.ki, 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); + goto out; + } + memcpy(&aud3g->u.umts.k, 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); + goto out; + } + memcpy(&aud3g->u.umts.opc, opc, sizeof(aud3g->u.umts.opc)); + aud3g->u.umts.opc_is_op = 0; + } else { + memcpy(&aud3g->u.umts.opc, op, sizeof(aud3g->u.umts.opc)); + aud3g->u.umts.opc_is_op = 1; + } + aud3g->u.umts.sqn = sqlite3_column_int64(stmt, 7); + /* FIXME: amf? */ + aud3g->type = OSMO_AUTH_TYPE_UMTS; + } else + LOGAUC(imsi, LOGL_DEBUG, "No 3G Auth Data\n"); +out: + /* remove bindings and reset statement to be re-executed */ + rc = sqlite3_clear_bindings(stmt); + if (rc != SQLITE_OK) { + LOGAUC(imsi, LOGL_ERROR, "Error in sqlite3_clear_bindings(): %d\n", rc); + } + rc = sqlite3_reset(stmt); + if (rc != SQLITE_OK) { + LOGAUC(imsi, LOGL_ERROR, "Error in sqlite3_reset(): %d\n", rc); + } + + if (aud2g->type == 0 && aud3g->type == 0) + return -1; + + return 0; +} + +int db_get_auc(struct db_context *dbc, const char *imsi, + 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; + uint64_t subscr_id; + int rc; + + rc = db_get_auth_data(dbc, imsi, &aud2g, &aud3g, &subscr_id); + if (rc < 0) + return rc; + + LOGAUC(imsi, LOGL_INFO, "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; + else + num_vec = rc; + 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 in DB\n"); + 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; + } + } + + return num_vec; +} |