2G ems initial

include/nettle/ctr.h

@@ -0,0 +1,71 @@
+/* ctr.h
+
+   Counter mode, using an network byte order incremented counter,
+   matching the testcases of NIST 800-38A.
+
+   Copyright (C) 2005 Niels Möller
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * 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.
+
+   or both in parallel, as here.
+
+   GNU Nettle 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef NETTLE_CTR_H_INCLUDED
+#define NETTLE_CTR_H_INCLUDED
+
+#include "nettle-types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define ctr_crypt nettle_ctr_crypt
+
+void
+ctr_crypt(const void *ctx, nettle_cipher_func *f,
+	  size_t block_size, uint8_t *ctr,
+	  size_t length, uint8_t *dst,
+	  const uint8_t *src);
+
+#define CTR_CTX(type, size) \
+{ type ctx; uint8_t ctr[size]; }
+
+#define CTR_SET_COUNTER(ctx, data) \
+memcpy((ctx)->ctr, (data), sizeof((ctx)->ctr))
+
+#define CTR_CRYPT(self, f, length, dst, src)		\
+  (0 ? ((f)(&(self)->ctx, ~(size_t) 0,			\
+	  (uint8_t *) 0, (const uint8_t *) 0))		\
+   : ctr_crypt((void *) &(self)->ctx,			\
+	       (nettle_cipher_func *) (f),		\
+	       sizeof((self)->ctr), (self)->ctr,	\
+	       (length), (dst), (src)))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_CTR_H_INCLUDED */