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authorHarald Welte <laforge@gnumonks.org>2016-04-28 07:18:49 +0200
committerHarald Welte <laforge@gnumonks.org>2016-04-28 07:18:49 +0200
commit7e900160096eca0e9225921e2d99742f1047fd36 (patch)
tree934761416bdfc2dd23e967210b74a5fb57a671f6
parentc5097633d01aedf9b5c47d0c3d059e58efaea95f (diff)
initial import of osmo-gsup-hlr code so far
-rw-r--r--osmo-gsup-hlr/.gitignore4
-rw-r--r--osmo-gsup-hlr/sql/hlr.sql67
-rw-r--r--osmo-gsup-hlr/sql/hlr_data.sql13
-rw-r--r--osmo-gsup-hlr/src/Makefile16
-rw-r--r--osmo-gsup-hlr/src/auc.c94
-rw-r--r--osmo-gsup-hlr/src/auc.h8
-rw-r--r--osmo-gsup-hlr/src/db.c121
-rw-r--r--osmo-gsup-hlr/src/db.h35
-rw-r--r--osmo-gsup-hlr/src/db_auc.c208
-rw-r--r--osmo-gsup-hlr/src/db_test.c84
-rw-r--r--osmo-gsup-hlr/src/gsup_server.c204
-rw-r--r--osmo-gsup-hlr/src/gsup_server.h40
-rw-r--r--osmo-gsup-hlr/src/hlr.c109
-rw-r--r--osmo-gsup-hlr/src/logging.c33
-rw-r--r--osmo-gsup-hlr/src/logging.h12
-rw-r--r--osmo-gsup-hlr/src/rand.h7
-rw-r--r--osmo-gsup-hlr/src/rand_fake.c52
-rw-r--r--osmo-gsup-hlr/src/rand_urandom.c38
18 files changed, 1145 insertions, 0 deletions
diff --git a/osmo-gsup-hlr/.gitignore b/osmo-gsup-hlr/.gitignore
new file mode 100644
index 0000000..3224f97
--- /dev/null
+++ b/osmo-gsup-hlr/.gitignore
@@ -0,0 +1,4 @@
+*.o
+*.db
+src/hlr
+src/db_test
diff --git a/osmo-gsup-hlr/sql/hlr.sql b/osmo-gsup-hlr/sql/hlr.sql
new file mode 100644
index 0000000..b95d260
--- /dev/null
+++ b/osmo-gsup-hlr/sql/hlr.sql
@@ -0,0 +1,67 @@
+--modelled roughly after TS 23.008 version 13.3.0
+
+CREATE TABLE subscriber (
+ id INTEGER PRIMARY KEY,
+ -- Chapter 2.1.1.1
+ imsi VARCHAR(15) NOT NULL,
+ -- Chapter 2.1.2
+ msisdn VARCHAR(15),
+ -- Chapter 2.2.3: Most recent / current IMEI
+ imeisv VARCHAR,
+ -- Chapter 2.4.5
+ vlr_number VARCHAR(15),
+ -- Chapter 2.4.6
+ hlr_number VARCHAR(15),
+ -- Chapter 2.4.8.1
+ sgsn_number VARCHAR(15),
+ -- Chapter 2.13.10
+ sgsn_address VARCHAR,
+ -- Chapter 2.4.8.2
+ ggsn_number VARCHAR(15),
+ -- Chapter 2.4.9.2
+ gmlc_number VARCHAR(15),
+ -- Chapter 2.4.23
+ smsc_number VARCHAR(15),
+ -- Chapter 2.4.24
+ periodic_lu_tmr INTEGER,
+ -- Chapter 2.13.115
+ periodic_rau_tau_tmr INTEGER,
+ -- Chapter 2.1.1.2: network access mode
+ nam_cs BOOLEAN NOT NULL DEFAULT TRUE,
+ nam_ps BOOLEAN NOT NULL DEFAULT TRUE,
+ -- Chapter 2.1.8
+ lmsi INTEGER,
+
+ -- Chapter 2.7.5
+ ms_purged_cs BOOLEAN NOT NULL DEFAULT FALSE,
+ -- Chapter 2.7.6
+ ms_purged_ps BOOLEAN NOT NULL DEFAULT FALSE
+);
+
+CREATE TABLE subscriber_apn (
+ subscriber_id INTEGER, -- subscriber.id
+ apn VARCHAR(256) NOT NULL
+);
+
+-- Chapter 2.1.3
+CREATE TABLE subscriber_multi_msisdn (
+ subscriber_id INTEGER, -- subscriber.id
+ msisdn VARCHAR(15) NOT NULL
+);
+
+CREATE TABLE auc_2g (
+ subscriber_id INTEGER PRIMARY KEY, -- subscriber.id
+ algo_id_2g INTEGER NOT NULL,
+ ki VARCHAR NOT NULL
+);
+
+CREATE TABLE auc_3g (
+ subscriber_id INTEGER PRIMARY KEY, -- subscrbier.id
+ algo_id_3g INTEGER NOT NULL,
+ k INTEGER NOT NULL,
+ op VARCHAR,
+ opc VARCHAR,
+ sqn INTEGER
+);
+
+-- SELECT algo_id_2g, ki, algo_id_3g, k, op, opc, sqn FROM subscriber LEFT JOIN auc_2g ON auc_2g.subscriber_id = subscriber.id LEFT JOIN auc_3g ON auc_3g.subscriber_id = subscriber.id WHERE imsi = ?
diff --git a/osmo-gsup-hlr/sql/hlr_data.sql b/osmo-gsup-hlr/sql/hlr_data.sql
new file mode 100644
index 0000000..939e4c9
--- /dev/null
+++ b/osmo-gsup-hlr/sql/hlr_data.sql
@@ -0,0 +1,13 @@
+
+-- 2G only subscriber
+INSERT INTO subscriber (id, imsi) VALUES (1, '901990000000001');
+INSERT INTO auc_2g (subscriber_id, algo_id_2g, ki) VALUES (1, 1, '000102030405060708090a0b0c0d0e0f');
+
+-- 3G only subscriber
+INSERT INTO subscriber (id, imsi) VALUES (2, '901990000000002');
+INSERT INTO auc_3g (subscriber_id, algo_id_3g, k, op, sqn) VALUES (2, 5, '000102030405060708090a0b0c0d0e0f', '101112131415161718191a1b1c1d1e1f', 0);
+
+-- 2G + 3G subscriber
+INSERT INTO subscriber (id, imsi) VALUES (3, '901990000000003');
+INSERT INTO auc_2g (subscriber_id, algo_id_2g, ki) VALUES (3, 1, '000102030405060708090a0b0c0d0e0f');
+INSERT INTO auc_3g (subscriber_id, algo_id_3g, k, op, sqn) VALUES (3, 5, '000102030405060708090a0b0c0d0e0f', '101112131415161718191a1b1c1d1e1f', 0);
diff --git a/osmo-gsup-hlr/src/Makefile b/osmo-gsup-hlr/src/Makefile
new file mode 100644
index 0000000..d7c597e
--- /dev/null
+++ b/osmo-gsup-hlr/src/Makefile
@@ -0,0 +1,16 @@
+LDFLAGS += -losmocore -losmogsm -losmoabis -lsqlite3 -ltalloc
+CFLAGS += -g -Wall
+
+OBJS = auc.o db.o db_auc.o logging.o
+
+db_test: db_test.o rand_fake.o $(OBJS)
+ $(CC) $(LDFLAGS) -o $@ $^
+
+hlr: hlr.o gsup_server.o rand_urandom.o $(OBJS)
+ $(CC) $(LDFLAGS) -o $@ $^
+
+%.o: %.c
+ $(CC) $(CFLAGS) -o $@ -c $^
+
+clean:
+ rm -f *.o db_test
diff --git a/osmo-gsup-hlr/src/auc.c b/osmo-gsup-hlr/src/auc.c
new file mode 100644
index 0000000..8ceafad
--- /dev/null
+++ b/osmo-gsup-hlr/src/auc.c
@@ -0,0 +1,94 @@
+/* (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 "logging.h"
+#include "rand.h"
+
+/* compute given number of vectors using either aud2g or aud2g or a combination
+ * of both. Handles re-synchrnization if rand_auts and auts are set */
+int auc_compute_vectors(struct osmo_auth_vector *vec, unsigned int num_vec,
+ struct osmo_sub_auth_data *aud2g,
+ struct osmo_sub_auth_data *aud3g,
+ const uint8_t *rand_auts, const uint8_t *auts)
+{
+ unsigned int i;
+ uint8_t rand[16];
+ int rc;
+
+ if (aud2g->algo == OSMO_AUTH_ALG_NONE)
+ aud2g = NULL;
+ if (aud3g->algo == OSMO_AUTH_ALG_NONE)
+ aud3g = NULL;
+
+ if (!aud2g && !aud3g)
+ return -1;
+
+ /* compute quintuples */
+ for (i = 0; i < num_vec; i++) {
+ rc = rand_get(rand, sizeof(rand));
+ if (rc != sizeof(rand)) {
+ LOGP(DAUC, LOGL_ERROR, "Unable to read %zu random "
+ "bytes: rc=%d\n", sizeof(rand), rc);
+ goto out;
+ }
+
+ if (aud2g && !aud3g) {
+ /* 2G only case: output directly to vec */
+ rc = osmo_auth_gen_vec(vec+i, aud2g, rand);
+ if (rc < 0) {
+ LOGP(DAUC, LOGL_ERROR, "Error in 2G vector "
+ "generation: %d\n", rc);
+ goto out;
+ }
+ } else if (aud3g) {
+ /* 3G or 3G + 2G case */
+ if (rand_auts && auts)
+ rc = osmo_auth_gen_vec_auts(vec+i, aud3g,
+ rand_auts,
+ auts, rand);
+ else
+ rc = osmo_auth_gen_vec(vec+i, aud3g, rand);
+ if (rc < 0) {
+ LOGP(DAUC, LOGL_ERROR, "Error in 3G vector "
+ "generation: %d\n", rc);
+ goto out;
+ }
+ }
+ if (aud2g && aud3g) {
+ /* separate 2G + 3G case: patch 2G into 3G */
+ struct osmo_auth_vector vtmp;
+ rc = osmo_auth_gen_vec(&vtmp, aud2g, rand);
+ if (rc < 0) {
+ LOGP(DAUC, LOGL_ERROR, "Error in 2G vector "
+ "generation: %d\n", rc);
+ goto out;
+ }
+ memcpy(&vec[i].kc, vtmp.kc, sizeof(vec[i].kc));
+ memcpy(&vec[i].sres, vtmp.sres, sizeof(vec[i].sres));
+ vec[i].auth_types |= OSMO_AUTH_TYPE_GSM;
+ }
+ }
+out:
+ return i;
+}
diff --git a/osmo-gsup-hlr/src/auc.h b/osmo-gsup-hlr/src/auc.h
new file mode 100644
index 0000000..f5b6765
--- /dev/null
+++ b/osmo-gsup-hlr/src/auc.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include <osmocom/crypt/auth.h>
+
+int auc_compute_vectors(struct osmo_auth_vector *vec, unsigned int num_vec,
+ struct osmo_sub_auth_data *aud2g,
+ struct osmo_sub_auth_data *aud3g,
+ const uint8_t *rand_auts, const uint8_t *auts);
diff --git a/osmo-gsup-hlr/src/db.c b/osmo-gsup-hlr/src/db.c
new file mode 100644
index 0000000..b4fadca
--- /dev/null
+++ b/osmo-gsup-hlr/src/db.c
@@ -0,0 +1,121 @@
+/* (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 <osmocom/core/utils.h>
+
+#include <sqlite3.h>
+
+#include "logging.h"
+#include "db.h"
+
+static const char *stmt_sql[] = {
+ [SEL_BY_IMSI] = "SELECT * FROM subscriber WHERE imsi = ?",
+ [UPD_BY_IMSI] = "UPDATE subscriber SET vlr_number = ? WHERE imsi = ?",
+ [AUC_BY_IMSI] = "SELECT id, algo_id_2g, ki, algo_id_3g, k, op, opc, sqn FROM subscriber LEFT JOIN auc_2g ON auc_2g.subscriber_id = subscriber.id LEFT JOIN auc_3g ON auc_3g.subscriber_id = subscriber.id WHERE imsi = ?",
+ [AUC_UPD_SQN] = "UPDATE auc_3g SET sqn = ? WHERE subscriber_id = ?",
+};
+
+static void sql3_error_log_cb(void *arg, int err_code, const char *msg)
+{
+ LOGP(DDB, LOGL_ERROR, "(%d) %s\n", err_code, msg);
+}
+
+static void sql3_sql_log_cb(void *arg, sqlite3 *s3, const char *stmt, int type)
+{
+ switch (type) {
+ case 0:
+ LOGP(DDB, LOGL_DEBUG, "Opened database\n");
+ break;
+ case 1:
+ LOGP(DDB, LOGL_DEBUG, stmt);
+ break;
+ case 2:
+ LOGP(DDB, LOGL_DEBUG, "Closed database\n");
+ break;
+ default:
+ LOGP(DDB, LOGL_DEBUG, "Unknown %d\n", type);
+ break;
+ }
+}
+
+void db_close(struct db_context *dbc)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(dbc->stmt); i++) {
+ /* it is ok to call finalize on NULL */
+ sqlite3_finalize(dbc->stmt[i]);
+ }
+ sqlite3_close(dbc->db);
+ talloc_free(dbc);
+}
+
+struct db_context *db_open(void *ctx, const char *fname)
+{
+ struct db_context *dbc = talloc_zero(ctx, struct db_context);
+ unsigned int i;
+ int rc;
+
+ LOGP(DDB, LOGL_INFO, "Compiled against SQLite3 lib version %s\n", SQLITE_VERSION);
+ LOGP(DDB, LOGL_INFO, "Running with SQLite3 lib version %s\n", sqlite3_libversion());
+
+ dbc->fname = talloc_strdup(dbc, fname);
+
+ for (i = 0; i < 0xfffff; i++) {
+ const char *o = sqlite3_compileoption_get(i);
+ if (!o)
+ break;
+ LOGP(DDB, LOGL_DEBUG, "SQlite3 compiled with '%s'\n", o);
+ }
+
+ rc = sqlite3_config(SQLITE_CONFIG_LOG, sql3_error_log_cb, NULL);
+ if (rc != SQLITE_OK)
+ LOGP(DDB, LOGL_NOTICE, "Unable to set SQlite3 error log callback\n");
+
+ rc = sqlite3_config(SQLITE_CONFIG_SQLLOG, sql3_sql_log_cb, NULL);
+ if (rc != SQLITE_OK)
+ LOGP(DDB, LOGL_NOTICE, "Unable to set SQlite3 SQL statement log callback\n");
+
+ rc = sqlite3_open(dbc->fname, &dbc->db);
+ if (rc != SQLITE_OK) {
+ LOGP(DDB, LOGL_ERROR, "Unable to open DB; rc = %d\n", rc);
+ talloc_free(dbc);
+ return NULL;
+ }
+
+ /* enable extended result codes */
+ rc = sqlite3_extended_result_codes(dbc->db, 1);
+ if (rc != SQLITE_OK)
+ LOGP(DDB, LOGL_ERROR, "Unable to enable SQlite3 extended result codes\n");
+
+ /* prepare all SQL statements */
+ for (i = 0; i < ARRAY_SIZE(dbc->stmt); i++) {
+ rc = sqlite3_prepare_v2(dbc->db, stmt_sql[i], -1,
+ &dbc->stmt[i], NULL);
+ if (rc != SQLITE_OK) {
+ LOGP(DDB, LOGL_ERROR, "Unable to prepare SQL statement '%s'\n", stmt_sql[i]);
+ goto out_free;
+ }
+ }
+
+ return dbc;
+out_free:
+ db_close(dbc);
+ return NULL;
+}
diff --git a/osmo-gsup-hlr/src/db.h b/osmo-gsup-hlr/src/db.h
new file mode 100644
index 0000000..f0545a4
--- /dev/null
+++ b/osmo-gsup-hlr/src/db.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <sqlite3.h>
+
+enum stmt_idx {
+ SEL_BY_IMSI = 0,
+ UPD_BY_IMSI = 1,
+ AUC_BY_IMSI = 2,
+ AUC_UPD_SQN = 3,
+ _NUM_STMT
+};
+
+struct db_context {
+ char *fname;
+ sqlite3 *db;
+ sqlite3_stmt *stmt[_NUM_STMT];
+};
+
+void db_close(struct db_context *dbc);
+struct db_context *db_open(void *ctx, const char *fname);
+
+#include <osmocom/crypt/auth.h>
+
+/* 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 *suscr_id);
+
+int db_update_sqn(struct db_context *dbc, uint64_t id,
+ uint64_t new_sqn);
+
+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);
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;
+}
diff --git a/osmo-gsup-hlr/src/db_test.c b/osmo-gsup-hlr/src/db_test.c
new file mode 100644
index 0000000..75fcb62
--- /dev/null
+++ b/osmo-gsup-hlr/src/db_test.c
@@ -0,0 +1,84 @@
+#include <string.h>
+
+#include <osmocom/core/utils.h>
+#include <osmocom/core/application.h>
+
+#include "db.h"
+#include "rand.h"
+#include "logging.h"
+
+static struct db_context *g_dbc;
+
+static int test(const char *imsi)
+{
+ struct osmo_auth_vector vec[3];
+ int rc, i;
+
+ /* initialize all vectors with a known token pattern */
+ memset(vec, 0x55, sizeof(vec));
+ for (i = 0; i < ARRAY_SIZE(vec); i++)
+ vec[i].res_len = 0;
+
+ rc = db_get_auc(g_dbc, imsi, vec, ARRAY_SIZE(vec), NULL, NULL);
+ if (rc <= 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Cannot obtain auth tuples for '%s'\n", imsi);
+ return rc;
+ }
+ LOGP(DMAIN, LOGL_INFO, "Obtained %u tuples for subscriber IMSI %s\n",
+ rc, imsi);
+
+ for (i = 0; i < rc; i++) {
+ struct osmo_auth_vector *v = vec + i;
+ LOGP(DMAIN, LOGL_DEBUG, "Tuple %u, auth_types=0x%x\n", i, v->auth_types);
+ LOGP(DMAIN, LOGL_DEBUG, "RAND=%s\n", osmo_hexdump_nospc(v->rand, sizeof(v->rand)));
+ LOGP(DMAIN, LOGL_DEBUG, "AUTN=%s\n", osmo_hexdump_nospc(v->autn, sizeof(v->autn)));
+ LOGP(DMAIN, LOGL_DEBUG, "CK=%s\n", osmo_hexdump_nospc(v->ck, sizeof(v->ck)));
+ LOGP(DMAIN, LOGL_DEBUG, "IK=%s\n", osmo_hexdump_nospc(v->ik, sizeof(v->ik)));
+ LOGP(DMAIN, LOGL_DEBUG, "RES=%s\n", osmo_hexdump_nospc(v->res, v->res_len));
+ LOGP(DMAIN, LOGL_DEBUG, "Kc=%s\n", osmo_hexdump_nospc(v->kc, sizeof(v->kc)));
+ LOGP(DMAIN, LOGL_DEBUG, "SRES=%s\n", osmo_hexdump_nospc(v->sres, sizeof(v->sres)));
+ }
+
+ return rc;
+}
+
+int main(int argc, char **argv)
+{
+ int rc;
+
+ rc = osmo_init_logging(&hlr_log_info);
+ if (rc < 0) {
+ fprintf(stderr, "Error initializing logging\n");
+ exit(1);
+ }
+ LOGP(DMAIN, LOGL_NOTICE, "hlr starting\n");
+
+ rc = rand_init();
+ if (rc < 0) {
+ LOGP(DMAIN, LOGL_ERROR, "Error initializing random source\n");
+ exit(1);
+ }
+
+ g_dbc = db_open(NULL, "hlr.db");
+ if (!g_dbc) {
+ LOGP(DMAIN, LOGL_ERROR, "Error opening database\n");
+ exit(1);
+ }
+
+ /* non-existing subscriber */
+ rc = test("901990123456789");
+ /* 2G only AUC data (COMP128v1 / MILENAGE) */
+ rc = test("901990000000001");
+ /* 2G + 3G AUC data (COMP128v1 / MILENAGE) */
+ rc = test("901990000000002");
+ /* 3G AUC data (MILENAGE) */
+ rc = test("901990000000003");
+
+ LOGP(DMAIN, LOGL_NOTICE, "Exiting\n");
+
+ db_close(g_dbc);
+
+ log_fini();
+
+ exit(0);
+}
diff --git a/osmo-gsup-hlr/src/gsup_server.c b/osmo-gsup-hlr/src/gsup_server.c
new file mode 100644
index 0000000..41a03f4
--- /dev/null
+++ b/osmo-gsup-hlr/src/gsup_server.c
@@ -0,0 +1,204 @@
+#include <errno.h>
+
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/abis/ipa.h>
+#include <osmocom/abis/ipaccess.h>
+
+#include "gsup_server.h"
+
+static void osmo_gsup_server_send(struct osmo_gsup_conn *conn,
+ int proto_ext, struct msgb *msg_tx)
+{
+ ipa_prepend_header_ext(msg_tx, proto_ext);
+ ipa_msg_push_header(msg_tx, IPAC_PROTO_OSMO);
+ ipa_server_conn_send(conn->conn, msg_tx);
+}
+
+int osmo_gsup_conn_send(struct osmo_gsup_conn *conn, struct msgb *msg)
+{
+ if (!conn) {
+ msgb_free(msg);
+ return -ENOTCONN;
+ }
+
+ osmo_gsup_server_send(conn, IPAC_PROTO_EXT_GSUP, msg);
+
+ return 0;
+}
+
+static int osmo_gsup_conn_oap_handle(struct osmo_gsup_conn *conn,
+ struct msgb *msg_rx)
+{
+ int rc;
+ struct msgb *msg_tx;
+#if 0
+ rc = oap_handle(&conn->oap_state, msg_rx, &msg_tx);
+ msgb_free(msg_rx);
+ if (rc < 0)
+ return rc;
+
+ if (msg_tx)
+ osmo_gsup_conn_send(conn, IPAC_PROTO_EXT_OAP, msg_tx);
+#endif
+ return 0;
+}
+
+
+/* Data from a given client has arrived over the socket */
+static int osmo_gsup_server_read_cb(struct ipa_server_conn *conn,
+ struct msgb *msg)
+{
+ struct ipaccess_head *hh = (struct ipaccess_head *) msg->data;
+ struct ipaccess_head_ext *he = (struct ipaccess_head_ext *) msgb_l2(msg);
+ struct osmo_gsup_conn *clnt = (struct osmo_gsup_conn *)conn->data;
+ int rc;
+ static struct ipaccess_unit ipa_dev = {
+ .unit_name = "HLR",
+ /* FIXME */
+ };
+
+ msg->l2h = &hh->data[0];
+
+ /* FIXME: not BTS for server side? */
+#if 0
+ rc = ipaccess_bts_handle_ccm(conn, &ipa_dev, msg);
+
+ if (rc < 0) {
+ LOGP(DLGSUP, LOGL_NOTICE,
+ "GSUP received an invalid IPA/CCM message from %s:%d\n",
+ conn->addr, conn->port);
+ /* Link has been closed */
+ clnt->is_connected = 0;
+ msgb_free(msg);
+ return -1;
+ }
+
+ if (rc == 1) {
+ uint8_t msg_type = *(msg->l2h);
+ /* CCM message */
+ if (msg_type == IPAC_MSGT_PONG) {
+ LOGP(DLGSUP, LOGL_DEBUG, "GSUP receiving PONG\n");
+ clnt->got_ipa_pong = 1;
+ }
+
+ msgb_free(msg);
+ return 0;
+ }
+#endif
+
+ if (hh->proto != IPAC_PROTO_OSMO)
+ goto invalid;
+
+ if (!he || msgb_l2len(msg) < sizeof(*he))
+ goto invalid;
+
+ msg->l2h = &he->data[0];
+
+ if (he->proto == IPAC_PROTO_EXT_GSUP) {
+ OSMO_ASSERT(clnt->server->read_cb != NULL);
+ clnt->server->read_cb(clnt, msg);
+ /* expecting read_cb() to free msg */
+ } else if (he->proto == IPAC_PROTO_EXT_OAP) {
+ return osmo_gsup_conn_oap_handle(clnt, msg);
+ /* osmo_gsup_client_oap_handle frees msg */
+ } else
+ goto invalid;
+
+ return 0;
+
+invalid:
+ LOGP(DLGSUP, LOGL_NOTICE,
+ "GSUP received an invalid IPA message from %s:%d, size = %d\n",
+ conn->addr, conn->port, msgb_length(msg));
+ msgb_free(msg);
+ return -1;
+
+}
+
+static int osmo_gsup_server_closed_cb(struct ipa_server_conn *conn)
+{
+ struct osmo_gsup_conn *clnt = (struct osmo_gsup_conn *)conn->data;
+
+ LOGP(DLGSUP, LOGL_INFO, "Lost GSUP client %s:%d\n",
+ conn->addr, conn->port);
+
+ llist_del(&clnt->list);
+
+ return 0;
+}
+
+/* a client has connected to the server socket and we have accept()ed it */
+static int osmo_gsup_server_accept_cb(struct ipa_server_link *link, int fd)
+{
+ struct osmo_gsup_conn *conn;
+ struct osmo_gsup_server *gsups =
+ (struct osmo_gsup_server *) link->data;
+
+ conn = talloc_zero(link->data, struct osmo_gsup_conn);
+ OSMO_ASSERT(conn);
+
+ conn->conn = ipa_server_conn_create(conn, link, fd,
+ osmo_gsup_server_read_cb,
+ osmo_gsup_server_closed_cb, conn);
+ OSMO_ASSERT(conn->conn);
+
+ /* link data structure with server structure */
+ conn->server = gsups;
+ llist_add_tail(&conn->list, &gsups->clients);
+
+ LOGP(DLGSUP, LOGL_INFO, "New GSUP client %s:%d\n",
+ conn->conn->addr, conn->conn->port);
+#if 0
+ rc = oap_init(&gsups->oap_config, &conn->oap_state);
+ if (rc != 0)
+ goto failed;
+failed:
+#endif
+ return 0;
+}
+
+struct osmo_gsup_server *
+osmo_gsup_server_create(void *ctx, const char *ip_addr,
+ uint16_t tcp_port,
+ osmo_gsup_read_cb_t read_cb)
+{
+ struct osmo_gsup_server *gsups;
+ int rc;
+
+ gsups = talloc_zero(ctx, struct osmo_gsup_server);
+ OSMO_ASSERT(gsups);
+
+ INIT_LLIST_HEAD(&gsups->clients);
+
+ gsups->link = ipa_server_link_create(gsups,
+ /* no e1inp */ NULL,
+ ip_addr, tcp_port,
+ osmo_gsup_server_accept_cb,
+ gsups);
+ if (!gsups->link)
+ goto failed;
+
+ gsups->read_cb = read_cb;
+
+ rc = ipa_server_link_open(gsups->link);
+ if (rc < 0)
+ goto failed;
+
+ return gsups;
+
+failed:
+ osmo_gsup_server_destroy(gsups);
+ return NULL;
+}
+
+void osmo_gsup_server_destroy(struct osmo_gsup_server *gsups)
+{
+ if (gsups->link) {
+ ipa_server_link_close(gsups->link);
+ ipa_server_link_destroy(gsups->link);
+ gsups->link = NULL;
+ }
+ talloc_free(gsups);
+}
diff --git a/osmo-gsup-hlr/src/gsup_server.h b/osmo-gsup-hlr/src/gsup_server.h
new file mode 100644
index 0000000..390bf2e
--- /dev/null
+++ b/osmo-gsup-hlr/src/gsup_server.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <osmocom/core/linuxlist.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/abis/ipa.h>
+#include <osmocom/abis/ipaccess.h>
+
+struct osmo_gsup_conn;
+
+/* Expects message in msg->l2h */
+typedef int (*osmo_gsup_read_cb_t)(struct osmo_gsup_conn *conn, struct msgb *msg);
+
+struct osmo_gsup_server {
+ /* list of osmo_gsup_conn */
+ struct llist_head clients;
+
+ struct ipa_server_link *link;
+ osmo_gsup_read_cb_t read_cb;
+};
+
+
+/* a single connection to a given client (SGSN, MSC) */
+struct osmo_gsup_conn {
+ struct llist_head list;
+
+ struct osmo_gsup_server *server;
+ struct ipa_server_conn *conn;
+ //struct oap_state oap_state;
+};
+
+
+int osmo_gsup_conn_send(struct osmo_gsup_conn *conn, struct msgb *msg);
+
+struct osmo_gsup_server *osmo_gsup_server_create(void *ctx,
+ const char *ip_addr,
+ uint16_t tcp_port,
+ osmo_gsup_read_cb_t read_cb);
+
+void osmo_gsup_server_destroy(struct osmo_gsup_server *gsups);
+
diff --git a/osmo-gsup-hlr/src/hlr.c b/osmo-gsup-hlr/src/hlr.c
new file mode 100644
index 0000000..be0e96e
--- /dev/null
+++ b/osmo-gsup-hlr/src/hlr.c
@@ -0,0 +1,109 @@
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+#include <osmocom/gsm/gsup.h>
+
+#include "db.h"
+#include "logging.h"
+#include "gsup_server.h"
+#include "rand.h"
+
+static struct db_context *g_dbc;
+
+/* process an incoming SAI request */
+static int rx_send_auth_info(struct osmo_gsup_conn *conn,
+ const struct osmo_gsup_message *gsup)
+{
+ struct osmo_gsup_message gsup_out;
+ struct msgb *msg_out;
+ int rc;
+
+ /* initialize return message structure */
+ memset(&gsup_out, 0, sizeof(gsup_out));
+ gsup_out.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_RESULT;
+ memcpy(&gsup_out.imsi, &gsup->imsi, sizeof(gsup_out.imsi));
+
+ rc = db_get_auc(g_dbc, gsup->imsi, gsup_out.auth_vectors,
+ ARRAY_SIZE(gsup_out.auth_vectors),
+ NULL /* gsup->rand_auts */, gsup->auts);
+ if (rc <= 0) {
+ gsup_out.message_type = OSMO_GSUP_MSGT_SEND_AUTH_INFO_ERROR;
+ }
+
+ msg_out = msgb_alloc(1024, "GSUP response");
+ osmo_gsup_encode(msg_out, &gsup_out);
+ return osmo_gsup_conn_send(conn, msg_out);
+}
+
+static int read_cb(struct osmo_gsup_conn *conn, struct msgb *msg)
+{
+ static struct osmo_gsup_message gsup;
+ int rc;
+
+ rc = osmo_gsup_decode(msgb_l3(msg), msgb_l3len(msg), &gsup);
+ if (rc < 0) {
+ LOGP(DMAIN, LOGL_ERROR, "error in GSUP decode: %d\n", rc);
+ return rc;
+ }
+
+ switch (gsup.message_type) {
+ /* requests sent to us */
+ case OSMO_GSUP_MSGT_SEND_AUTH_INFO_REQUEST:
+ rx_send_auth_info(conn, &gsup);
+ break;
+ case OSMO_GSUP_MSGT_UPDATE_LOCATION_REQUEST:
+ break;
+ /* responses to requests sent by us */
+ case OSMO_GSUP_MSGT_INSERT_DATA_ERROR:
+ break;
+ case OSMO_GSUP_MSGT_INSERT_DATA_RESULT:
+ break;
+ default:
+ LOGP(DMAIN, LOGL_DEBUG, "Unhandled GSUP message type %u\n",
+ gsup.message_type);
+ break;
+ }
+ return 0;
+}
+
+
+int main(int argc, char **argv)
+{
+ struct osmo_gsup_server *gs;
+ int rc;
+
+ rc = osmo_init_logging(&hlr_log_info);
+ if (rc < 0) {
+ fprintf(stderr, "Error initializing logging\n");
+ exit(1);
+ }
+ LOGP(DMAIN, LOGL_NOTICE, "hlr starting\n");
+
+ rc = rand_init();
+ if (rc < 0) {
+ LOGP(DMAIN, LOGL_FATAL, "Error initializing random source\n");
+ exit(1);
+ }
+
+ g_dbc = db_open(NULL, "hlr.db");
+ if (!g_dbc) {
+ LOGP(DMAIN, LOGL_FATAL, "Error opening database\n");
+ exit(1);
+ }
+
+ gs = osmo_gsup_server_create(NULL, NULL, 2222, read_cb);
+ if (!gs) {
+ LOGP(DMAIN, LOGL_FATAL, "Error starting GSUP server\n");
+ exit(1);
+ }
+
+ while (1) {
+ osmo_select_main(0);
+ }
+
+ db_close(g_dbc);
+
+ log_fini();
+
+ exit(0);
+}
diff --git a/osmo-gsup-hlr/src/logging.c b/osmo-gsup-hlr/src/logging.c
new file mode 100644
index 0000000..54c8900
--- /dev/null
+++ b/osmo-gsup-hlr/src/logging.c
@@ -0,0 +1,33 @@
+#include <osmocom/core/utils.h>
+#include "logging.h"
+
+const struct log_info_cat hlr_log_info_cat[] = {
+ [DMAIN] = {
+ .name = "DMAIN",
+ .description = "Main Program",
+ .enabled = 1, .loglevel = LOGL_DEBUG,
+ },
+ [DDB] = {
+ .name = "DDB",
+ .description = "Database Layer",
+ .color = "\033[1;31m",
+ .enabled = 1, .loglevel = LOGL_DEBUG,
+ },
+ [DLGSUP] = {
+ .name = "DLGSUP",
+ .description = "GSUP Protocol",
+ .color = "\033[1;32m",
+ .enabled = 1, .loglevel = LOGL_INFO,
+ },
+ [DAUC] = {
+ .name = "DAUC",
+ .description = "Authentication Center",
+ .color = "\033[1;33m",
+ .enabled = 1, .loglevel = LOGL_DEBUG,
+ },
+};
+
+const struct log_info hlr_log_info = {
+ .cat = hlr_log_info_cat,
+ .num_cat = ARRAY_SIZE(hlr_log_info_cat),
+};
diff --git a/osmo-gsup-hlr/src/logging.h b/osmo-gsup-hlr/src/logging.h
new file mode 100644
index 0000000..fdaf5d1
--- /dev/null
+++ b/osmo-gsup-hlr/src/logging.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <osmocom/core/logging.h>
+
+enum {
+ DMAIN,
+ DDB,
+ DGSUP,
+ DAUC,
+};
+
+extern const struct log_info hlr_log_info;
diff --git a/osmo-gsup-hlr/src/rand.h b/osmo-gsup-hlr/src/rand.h
new file mode 100644
index 0000000..9c5aedf
--- /dev/null
+++ b/osmo-gsup-hlr/src/rand.h
@@ -0,0 +1,7 @@
+#pragma once
+
+#include <stdint.h>
+
+int rand_init(void);
+
+int rand_get(uint8_t *rand, unsigned int len);
diff --git a/osmo-gsup-hlr/src/rand_fake.c b/osmo-gsup-hlr/src/rand_fake.c
new file mode 100644
index 0000000..ad0cc68
--- /dev/null
+++ b/osmo-gsup-hlr/src/rand_fake.c
@@ -0,0 +1,52 @@
+/* (C) 2012 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 <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+static uint8_t ctr = 0;
+
+static void print_msg(void)
+{
+ static int printed = 0;
+ if (!printed) {
+ fprintf(stderr, "Using fake random generator for deterministic "
+ "test results. NEVER USE THIS IN PRODUCTION\n");
+ printed = 1;
+ }
+}
+
+int rand_init(void)
+{
+ print_msg();
+ return 0;
+}
+
+int rand_get(uint8_t *rand, unsigned int len)
+{
+ print_msg();
+ memset(rand, ctr, len);
+ ctr++;
+ return len;
+}
diff --git a/osmo-gsup-hlr/src/rand_urandom.c b/osmo-gsup-hlr/src/rand_urandom.c
new file mode 100644
index 0000000..68243ca
--- /dev/null
+++ b/osmo-gsup-hlr/src/rand_urandom.c
@@ -0,0 +1,38 @@
+/* (C) 2012 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 <stdio.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+static int rand_fd = -1;
+int rand_init(void)
+{
+ rand_fd = open("/dev/urandom", O_RDONLY);
+
+ return rand_fd;
+}
+
+int rand_get(uint8_t *rand, unsigned int len)
+{
+ return read(rand_fd, rand, len);
+}