Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 1 | /* (C) 2015 by Harald Welte <laforge@gnumonks.org> |
| 2 | * |
| 3 | * All Rights Reserved |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU Affero General Public License as published by |
| 7 | * the Free Software Foundation; either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU Affero General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Affero General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include <string.h> |
Neels Hofmeyr | ee392bb | 2017-03-16 05:20:50 +0100 | [diff] [blame] | 21 | #include <inttypes.h> |
Neels Hofmeyr | 57a8792 | 2017-10-09 17:51:13 +0200 | [diff] [blame] | 22 | #include <errno.h> |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 23 | |
| 24 | #include <osmocom/core/utils.h> |
| 25 | #include <osmocom/crypt/auth.h> |
| 26 | |
| 27 | #include <sqlite3.h> |
| 28 | |
| 29 | #include "logging.h" |
| 30 | #include "db.h" |
| 31 | #include "auc.h" |
| 32 | #include "rand.h" |
| 33 | |
Neels Hofmeyr | 40aa61c | 2017-10-09 17:56:04 +0200 | [diff] [blame] | 34 | #define LOGAUC(imsi, level, fmt, args ...) LOGP(DAUC, level, "IMSI='%s': " fmt, imsi, ## args) |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 35 | |
| 36 | /* update the SQN for a given subscriber ID */ |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 37 | int db_update_sqn(struct db_context *dbc, int64_t subscr_id, uint64_t new_sqn) |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 38 | { |
Neels Hofmeyr | 4bde949 | 2017-10-06 03:09:34 +0200 | [diff] [blame] | 39 | sqlite3_stmt *stmt = dbc->stmt[DB_STMT_AUC_UPD_SQN]; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 40 | int rc; |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 41 | int ret = 0; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 42 | |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 43 | if (!db_bind_int64(stmt, "$sqn", new_sqn)) |
| 44 | return -EIO; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 45 | |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 46 | if (!db_bind_int64(stmt, "$subscriber_id", subscr_id)) |
| 47 | return -EIO; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 48 | |
| 49 | /* execute the statement */ |
| 50 | rc = sqlite3_step(stmt); |
| 51 | if (rc != SQLITE_DONE) { |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 52 | LOGP(DAUC, LOGL_ERROR, "Cannot update SQN for subscriber ID=%"PRId64 |
| 53 | ": SQL error: (%d) %s\n", |
| 54 | subscr_id, rc, sqlite3_errmsg(dbc->db)); |
| 55 | ret = -EIO; |
| 56 | goto out; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 57 | } |
| 58 | |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 59 | /* verify execution result */ |
| 60 | rc = sqlite3_changes(dbc->db); |
| 61 | if (!rc) { |
| 62 | LOGP(DAUC, LOGL_ERROR, "Cannot update SQN for subscriber ID=%"PRId64 |
| 63 | ": no auc_3g entry for such subscriber\n", subscr_id); |
| 64 | ret = -ENOENT; |
| 65 | } else if (rc != 1) { |
| 66 | LOGP(DAUC, LOGL_ERROR, "Update SQN for subscriber ID=%"PRId64 |
| 67 | ": SQL modified %d rows (expected 1)\n", subscr_id, rc); |
| 68 | ret = -EIO; |
| 69 | } |
| 70 | |
| 71 | out: |
Neels Hofmeyr | 76328e5 | 2017-10-09 22:49:25 +0200 | [diff] [blame] | 72 | db_remove_reset(stmt); |
Neels Hofmeyr | 1cbdb70 | 2017-10-09 23:03:57 +0200 | [diff] [blame] | 73 | return ret; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 74 | } |
| 75 | |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 76 | /* obtain the authentication data for a given imsi |
Neels Hofmeyr | bd1dca0 | 2017-11-23 15:25:30 +0100 | [diff] [blame] | 77 | * returns 0 for success, negative value on error: |
| 78 | * -ENOENT if the IMSI is not known, -ENOKEY if the IMSI is known but has no auth data, |
| 79 | * -EIO on db failure */ |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 80 | int db_get_auth_data(struct db_context *dbc, const char *imsi, |
| 81 | struct osmo_sub_auth_data *aud2g, |
| 82 | struct osmo_sub_auth_data *aud3g, |
Neels Hofmeyr | 32633e2 | 2017-10-06 04:26:21 +0200 | [diff] [blame] | 83 | int64_t *subscr_id) |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 84 | { |
Neels Hofmeyr | 4bde949 | 2017-10-06 03:09:34 +0200 | [diff] [blame] | 85 | sqlite3_stmt *stmt = dbc->stmt[DB_STMT_AUC_BY_IMSI]; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 86 | int ret = 0; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 87 | int rc; |
| 88 | |
| 89 | memset(aud2g, 0, sizeof(*aud2g)); |
| 90 | memset(aud3g, 0, sizeof(*aud3g)); |
| 91 | |
Neels Hofmeyr | c5122f2 | 2017-10-09 23:12:57 +0200 | [diff] [blame] | 92 | if (!db_bind_text(stmt, "$imsi", imsi)) |
| 93 | return -EIO; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 94 | |
| 95 | /* execute the statement */ |
| 96 | rc = sqlite3_step(stmt); |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 97 | if (rc == SQLITE_DONE) { |
Neels Hofmeyr | 40aa61c | 2017-10-09 17:56:04 +0200 | [diff] [blame] | 98 | LOGAUC(imsi, LOGL_INFO, "No such subscriber\n"); |
Neels Hofmeyr | 57a8792 | 2017-10-09 17:51:13 +0200 | [diff] [blame] | 99 | ret = -ENOENT; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 100 | goto out; |
| 101 | } else if (rc != SQLITE_ROW) { |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 102 | LOGAUC(imsi, LOGL_ERROR, "Error executing SQL: %d\n", rc); |
Neels Hofmeyr | 57a8792 | 2017-10-09 17:51:13 +0200 | [diff] [blame] | 103 | ret = -EIO; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 104 | goto out; |
| 105 | } |
| 106 | |
| 107 | /* as an optimization, we retrieve the subscriber ID, to ensure we can |
| 108 | * update the SQN later without having to go back via a JOIN with the |
| 109 | * subscriber table. */ |
| 110 | if (subscr_id) |
| 111 | *subscr_id = sqlite3_column_int64(stmt, 0); |
| 112 | |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 113 | /* obtain result values using sqlite3_column_*() */ |
| 114 | if (sqlite3_column_type(stmt, 1) == SQLITE_INTEGER) { |
| 115 | /* we do have some 2G authentication data */ |
| 116 | const uint8_t *ki; |
| 117 | |
| 118 | aud2g->algo = sqlite3_column_int(stmt, 1); |
| 119 | ki = sqlite3_column_text(stmt, 2); |
| 120 | #if 0 |
| 121 | if (sqlite3_column_bytes(stmt, 2) != sizeof(aud2g->u.gsm.ki)) { |
| 122 | LOGAUC(imsi, LOGL_ERROR, "Error reading Ki: %d\n", rc); |
| 123 | goto end_2g; |
| 124 | } |
| 125 | #endif |
Neels Hofmeyr | ec1b959 | 2016-12-11 01:22:23 +0100 | [diff] [blame] | 126 | osmo_hexparse((void*)ki, (void*)&aud2g->u.gsm.ki, sizeof(aud2g->u.gsm.ki)); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 127 | aud2g->type = OSMO_AUTH_TYPE_GSM; |
| 128 | } else |
| 129 | LOGAUC(imsi, LOGL_DEBUG, "No 2G Auth Data\n"); |
| 130 | //end_2g: |
| 131 | if (sqlite3_column_type(stmt, 3) == SQLITE_INTEGER) { |
| 132 | /* we do have some 3G authentication data */ |
| 133 | const uint8_t *k, *op, *opc; |
| 134 | |
| 135 | aud3g->algo = sqlite3_column_int(stmt, 3); |
| 136 | k = sqlite3_column_text(stmt, 4); |
| 137 | if (!k) { |
| 138 | LOGAUC(imsi, LOGL_ERROR, "Error reading K: %d\n", rc); |
Neels Hofmeyr | 57a8792 | 2017-10-09 17:51:13 +0200 | [diff] [blame] | 139 | ret = -EIO; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 140 | goto out; |
| 141 | } |
Neels Hofmeyr | ec1b959 | 2016-12-11 01:22:23 +0100 | [diff] [blame] | 142 | osmo_hexparse((void*)k, (void*)&aud3g->u.umts.k, sizeof(aud3g->u.umts.k)); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 143 | /* UMTS Subscribers can have either OP or OPC */ |
| 144 | op = sqlite3_column_text(stmt, 5); |
| 145 | if (!op) { |
| 146 | opc = sqlite3_column_text(stmt, 6); |
| 147 | if (!opc) { |
| 148 | LOGAUC(imsi, LOGL_ERROR, "Error reading OPC: %d\n", rc); |
Neels Hofmeyr | 57a8792 | 2017-10-09 17:51:13 +0200 | [diff] [blame] | 149 | ret = -EIO; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 150 | goto out; |
| 151 | } |
Neels Hofmeyr | ec1b959 | 2016-12-11 01:22:23 +0100 | [diff] [blame] | 152 | osmo_hexparse((void*)opc, (void*)&aud3g->u.umts.opc, |
Harald Welte | 64f3ca3 | 2016-05-05 17:07:17 +0200 | [diff] [blame] | 153 | sizeof(aud3g->u.umts.opc)); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 154 | aud3g->u.umts.opc_is_op = 0; |
| 155 | } else { |
Neels Hofmeyr | ec1b959 | 2016-12-11 01:22:23 +0100 | [diff] [blame] | 156 | osmo_hexparse((void*)op, (void*)&aud3g->u.umts.opc, |
Harald Welte | 64f3ca3 | 2016-05-05 17:07:17 +0200 | [diff] [blame] | 157 | sizeof(aud3g->u.umts.opc)); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 158 | aud3g->u.umts.opc_is_op = 1; |
| 159 | } |
| 160 | aud3g->u.umts.sqn = sqlite3_column_int64(stmt, 7); |
Neels Hofmeyr | cab2fcd | 2017-03-15 00:07:43 +0100 | [diff] [blame] | 161 | aud3g->u.umts.ind_bitlen = sqlite3_column_int(stmt, 8); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 162 | /* FIXME: amf? */ |
| 163 | aud3g->type = OSMO_AUTH_TYPE_UMTS; |
| 164 | } else |
| 165 | LOGAUC(imsi, LOGL_DEBUG, "No 3G Auth Data\n"); |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 166 | |
| 167 | if (aud2g->type == 0 && aud3g->type == 0) |
Neels Hofmeyr | bd1dca0 | 2017-11-23 15:25:30 +0100 | [diff] [blame] | 168 | ret = -ENOKEY; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 169 | |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 170 | out: |
Neels Hofmeyr | 76328e5 | 2017-10-09 22:49:25 +0200 | [diff] [blame] | 171 | db_remove_reset(stmt); |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 172 | return ret; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 173 | } |
| 174 | |
Neels Hofmeyr | bd1dca0 | 2017-11-23 15:25:30 +0100 | [diff] [blame] | 175 | /* return number of vectors generated, negative value on error: |
| 176 | * -ENOENT if the IMSI is not known, -ENOKEY if the IMSI is known but has no auth data, |
| 177 | * -EIO on db failure */ |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 178 | int db_get_auc(struct db_context *dbc, const char *imsi, |
Neels Hofmeyr | cab2fcd | 2017-03-15 00:07:43 +0100 | [diff] [blame] | 179 | unsigned int auc_3g_ind, struct osmo_auth_vector *vec, |
| 180 | unsigned int num_vec, const uint8_t *rand_auts, |
| 181 | const uint8_t *auts) |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 182 | { |
| 183 | struct osmo_sub_auth_data aud2g, aud3g; |
Neels Hofmeyr | 32633e2 | 2017-10-06 04:26:21 +0200 | [diff] [blame] | 184 | int64_t subscr_id; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 185 | int ret = 0; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 186 | int rc; |
| 187 | |
| 188 | rc = db_get_auth_data(dbc, imsi, &aud2g, &aud3g, &subscr_id); |
Neels Hofmeyr | 57a8792 | 2017-10-09 17:51:13 +0200 | [diff] [blame] | 189 | if (rc) |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 190 | return rc; |
| 191 | |
Neels Hofmeyr | cab2fcd | 2017-03-15 00:07:43 +0100 | [diff] [blame] | 192 | aud3g.u.umts.ind = auc_3g_ind; |
| 193 | if (aud3g.type == OSMO_AUTH_TYPE_UMTS |
| 194 | && aud3g.u.umts.ind >= (1U << aud3g.u.umts.ind_bitlen)) { |
| 195 | LOGAUC(imsi, LOGL_NOTICE, "3G auth: SQN's IND bitlen %u is" |
| 196 | " too small to hold an index of %u. Truncating. This" |
| 197 | " may cause numerous additional AUTS resyncing.\n", |
| 198 | aud3g.u.umts.ind_bitlen, aud3g.u.umts.ind); |
| 199 | aud3g.u.umts.ind &= (1U << aud3g.u.umts.ind_bitlen) - 1; |
| 200 | } |
| 201 | |
Neels Hofmeyr | 0acd31e | 2016-12-16 16:11:36 +0100 | [diff] [blame] | 202 | LOGAUC(imsi, LOGL_DEBUG, "Calling to generate %u vectors\n", num_vec); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 203 | rc = auc_compute_vectors(vec, num_vec, &aud2g, &aud3g, rand_auts, auts); |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 204 | if (rc < 0) { |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 205 | num_vec = 0; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 206 | ret = -1; |
| 207 | } else { |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 208 | num_vec = rc; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 209 | ret = num_vec; |
| 210 | } |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 211 | LOGAUC(imsi, LOGL_INFO, "Generated %u vectors\n", num_vec); |
| 212 | |
| 213 | /* Update SQN in database, as needed */ |
| 214 | if (aud3g.algo) { |
Neels Hofmeyr | edebc22 | 2017-03-16 04:58:58 +0100 | [diff] [blame] | 215 | LOGAUC(imsi, LOGL_DEBUG, "Updating SQN=%" PRIu64 " in DB\n", |
| 216 | aud3g.u.umts.sqn); |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 217 | rc = db_update_sqn(dbc, subscr_id, aud3g.u.umts.sqn); |
| 218 | /* don't tell caller we generated any triplets in case of |
| 219 | * update error */ |
| 220 | if (rc < 0) { |
| 221 | LOGAUC(imsi, LOGL_ERROR, "Error updating SQN: %d\n", rc); |
| 222 | num_vec = 0; |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 223 | ret = -1; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 224 | } |
| 225 | } |
| 226 | |
Harald Welte | cfc752b | 2016-05-05 16:38:14 +0200 | [diff] [blame] | 227 | return ret; |
Harald Welte | e72cf55 | 2016-04-28 07:18:49 +0200 | [diff] [blame] | 228 | } |