renamed openair-cn to openair3

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7886 818b1a75-f10b-46b9-bf7c-635c3b92a50f
2015-10-06 16:53:42 +00:00
parent c7518ecf42
commit 7b5431a62c
705 changed files with 206 additions and 208 deletions
@@ -0,0 +1,104 @@
+/*******************************************************************************
+    OpenAirInterface
+    Copyright(c) 1999 - 2014 Eurecom
+
+    OpenAirInterface 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 3 of the License, or
+    (at your option) any later version.
+
+
+    OpenAirInterface 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 OpenAirInterface.The full GNU General Public License is
+   included in this distribution in the file called "COPYING". If not,
+   see <http://www.gnu.org/licenses/>.
+
+  Contact Information
+  OpenAirInterface Admin: openair_admin@eurecom.fr
+  OpenAirInterface Tech : openair_tech@eurecom.fr
+  OpenAirInterface Dev  : openair4g-devel@lists.eurecom.fr
+
+  Address      : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
+
+ *******************************************************************************/
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <nettle/nettle-meta.h>
+#include <nettle/aes.h>
+#include <nettle/ctr.h>
+
+#include "assertions.h"
+#include "conversions.h"
+#include "secu_defs.h"
+
+// #define SECU_DEBUG
+
+int nas_stream_encrypt_eea2(nas_stream_cipher_t *stream_cipher, uint8_t *out)
+{
+  uint8_t m[16];
+  uint32_t local_count;
+
+  void *ctx;
+  uint8_t *data;
+
+  uint32_t zero_bit = 0;
+  uint32_t byte_length;
+
+  DevAssert(stream_cipher != NULL);
+  DevAssert(out != NULL);
+
+  zero_bit = stream_cipher->blength & 0x7;
+
+  byte_length = stream_cipher->blength >> 3;
+
+  if (zero_bit > 0)
+    byte_length += 1;
+
+  ctx = malloc(nettle_aes128.context_size);
+  data = malloc(byte_length);
+
+  local_count = hton_int32(stream_cipher->count);
+
+  memset(m, 0, sizeof(m));
+  memcpy(&m[0], &local_count, 4);
+  m[4] = ((stream_cipher->bearer & 0x1F) << 3) |
+         ((stream_cipher->direction & 0x01) << 2);
+  /* Other bits are 0 */
+
+#if defined(SECU_DEBUG)
+  {
+    int i;
+    printf("Blength: %u, Zero bits: %u\n", stream_cipher->blength, zero_bit);
+
+    for (i = 0; i < sizeof(m); i++)
+      printf("0x%02x ", m[i]);
+
+    printf("\n");
+  }
+#endif
+
+  nettle_aes128.set_encrypt_key(ctx, stream_cipher->key_length,
+                                stream_cipher->key);
+
+  nettle_ctr_crypt(ctx, nettle_aes128.encrypt,
+                   nettle_aes128.block_size, m,
+                   byte_length, data, stream_cipher->message);
+
+  if (zero_bit > 0)
+    data[byte_length - 1] = data[byte_length - 1] & (uint8_t)(0xFF << (8 - zero_bit));
+
+
+  memcpy(out, data, byte_length);
+  free(data);
+  free(ctx);
+
+  return 0;
+}