New interface for AES-192.

1 files changed, 46 insertions, 0 deletions

diff --git a/aes192-set-decrypt-key.c b/aes192-set-decrypt-key.c
new file mode 100644
index 00000000..496bee69
--- /dev/null
+++ b/aes192-set-decrypt-key.c
@@ -0,0 +1,46 @@
+/* aes192-set-decrypt-key.c
+ *
+ * Key setup for the aes/rijndael block cipher.
+ */
+
+/* nettle, low-level cryptographics library
+ *
+ * Copyright (C) 2013, Niels Möller
+ *  
+ * The nettle library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ * 
+ * The nettle library 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 Lesser General Public
+ * License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with the nettle library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02111-1301, USA.
+ */
+
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <assert.h>
+
+#include "aes-internal.h"
+#include "macros.h"
+
+void
+aes192_invert_key (struct aes192_ctx *dst, const struct aes192_ctx *src)
+{
+  _aes_invert (_AES192_ROUNDS, dst->keys, src->keys); 
+}
+
+void
+aes192_set_decrypt_key(struct aes192_ctx *ctx, const uint8_t *key)
+{
+  aes192_set_encrypt_key (ctx, key);
+  aes192_invert_key (ctx, ctx);
+}