1 files changed, 72 insertions, 0 deletions
diff --git a/attic/historic/anode/libanode/impl/aes.c b/attic/historic/anode/libanode/impl/aes.c
new file mode 100644
index 00000000..90e5e23b
--- /dev/null
+++ b/attic/historic/anode/libanode/impl/aes.c
@@ -0,0 +1,72 @@
+/* libanode: the Anode C reference implementation
+ * Copyright (C) 2009-2010 Adam Ierymenko <adam.ierymenko@gmail.com>
+ *
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include "aes.h"
+
+void Anode_cmac_aes256(
+  const AnodeAesExpandedKey *expkey,
+  const unsigned char *restrict data,
+  unsigned long data_len,
+  unsigned char *restrict mac)
+{
+  unsigned char cbc[16];
+  unsigned char pad[16];
+  const unsigned char *restrict pos = data;
+  unsigned long i;
+  unsigned long remaining = data_len;
+  unsigned char c;
+
+  ((uint64_t *)((void *)cbc))[0] = 0ULL;
+  ((uint64_t *)((void *)cbc))[1] = 0ULL;
+
+  while (remaining >= 16) {
+    ((uint64_t *)((void *)cbc))[0] ^= ((uint64_t *)((void *)pos))[0];
+    ((uint64_t *)((void *)cbc))[1] ^= ((uint64_t *)((void *)pos))[1];
+    pos += 16;
+    if (remaining > 16)
+      Anode_aes256_encrypt(expkey,cbc,cbc);
+    remaining -= 16;
+  }
+
+  ((uint64_t *)((void *)pad))[0] = 0ULL;
+  ((uint64_t *)((void *)pad))[1] = 0ULL;
+  Anode_aes256_encrypt(expkey,pad,pad);
+
+  c = pad[0] & 0x80;
+  for(i=0;i<15;++i)
+    pad[i] = (pad[i] << 1) | (pad[i + 1] >> 7);
+  pad[15] <<= 1;
+  if (c)
+    pad[15] ^= 0x87;
+
+  if (remaining||(!data_len)) {
+    for(i=0;i<remaining;++i)
+      cbc[i] ^= *(pos++);
+    cbc[remaining] ^= 0x80;
+
+    c = pad[0] & 0x80;
+    for(i=0;i<15;++i)
+      pad[i] = (pad[i] << 1) | (pad[i + 1] >> 7);
+    pad[15] <<= 1;
+    if (c)
+      pad[15] ^= 0x87;
+  }
+
+  ((uint64_t *)((void *)mac))[0] = ((uint64_t *)((void *)pad))[0] ^ ((uint64_t *)((void *)cbc))[0];
+  ((uint64_t *)((void *)mac))[1] = ((uint64_t *)((void *)pad))[1] ^ ((uint64_t *)((void *)cbc))[1];
+
+  Anode_aes256_encrypt(expkey,mac,mac);
+}