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authorSylvain Munaut <tnt@246tNt.com>2014-02-06 14:00:13 +0100
committerSylvain Munaut <tnt@246tNt.com>2014-03-07 17:45:41 +0100
commit01513720b0b186056fc81d82a07713e728ec1ce7 (patch)
tree99d44ddece6e20a5506b1f2d805da2bcab647624 /src
parent9e76905c566e5c61bc9889b9b981b49c1b49fc89 (diff)
gsm/auth: Add the XOR test algorithmsylvain/security
Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Diffstat (limited to 'src')
-rw-r--r--src/gsm/Makefile.am2
-rw-r--r--src/gsm/auth_xor.c51
2 files changed, 52 insertions, 1 deletions
diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am
index 3162a7fc..08a0bfd0 100644
--- a/src/gsm/Makefile.am
+++ b/src/gsm/Makefile.am
@@ -17,7 +17,7 @@ libosmogsm_la_SOURCES = a5.c rxlev_stat.c tlv_parser.c comp128.c comp128v23.c \
gsm0411_utils.c gsm0411_smc.c gsm0411_smr.c \
lapd_core.c lapdm.c \
auth_core.c auth_comp128v1.c auth_comp128v23.c \
- auth_milenage.c milenage/aes-encblock.c \
+ auth_xor.c auth_milenage.c milenage/aes-encblock.c \
milenage/aes-internal.c milenage/aes-internal-enc.c \
milenage/milenage.c gan.c
diff --git a/src/gsm/auth_xor.c b/src/gsm/auth_xor.c
new file mode 100644
index 00000000..2520f096
--- /dev/null
+++ b/src/gsm/auth_xor.c
@@ -0,0 +1,51 @@
+/* GSM/GPRS/3G authentication core infrastructure */
+
+/* (C) 2014 by Sylvain Munaut <tnt@246tNt.com>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <osmocom/crypt/auth.h>
+
+static int xor_gen_vec(struct osmo_auth_vector *vec,
+ struct osmo_sub_auth_data *aud,
+ const uint8_t *_rand)
+{
+ int i;
+
+ for (i=0; i<4; i++)
+ vec->sres[i] = _rand[i] ^ aud->u.gsm.ki[i];
+ for (i=0; i<8; i++)
+ vec->kc[i] = _rand[i+4] ^ aud->u.gsm.ki[i+4];
+
+ vec->auth_types = OSMO_AUTH_TYPE_GSM;
+
+ return 0;
+}
+
+static struct osmo_auth_impl xor_alg = {
+ .algo = OSMO_AUTH_ALG_XOR,
+ .name = "XOR (libosmogsm built-in)",
+ .priority = 1000,
+ .gen_vec = &xor_gen_vec,
+};
+
+static __attribute__((constructor)) void on_dso_load_xor(void)
+{
+ osmo_auth_register(&xor_alg);
+}