2G ems initial

include/nettle/cast128.h

@@ -0,0 +1,86 @@
+/* cast128.h
+
+   The CAST-128 block cipher.
+
+   Copyright (C) 2001, 2014 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_CAST128_H_INCLUDED
+#define NETTLE_CAST128_H_INCLUDED
+
+#include "nettle-types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Name mangling */
+#define cast5_set_key nettle_cast5_set_key
+#define cast128_set_key nettle_cast128_set_key
+#define cast128_encrypt nettle_cast128_encrypt
+#define cast128_decrypt nettle_cast128_decrypt
+
+#define CAST128_BLOCK_SIZE 8
+
+/* Variable key size between 40 and 128. */
+#define CAST5_MIN_KEY_SIZE 5
+#define CAST5_MAX_KEY_SIZE 16
+
+#define CAST128_KEY_SIZE 16
+
+struct cast128_ctx
+{
+  unsigned rounds;  /* Number of rounds to use, 12 or 16 */
+  /* Expanded key, rotations (5 bits only) and 32-bit masks. */
+  unsigned char Kr[16];
+  uint32_t Km[16];
+};
+
+/* Using variable key size. */
+void
+cast5_set_key(struct cast128_ctx *ctx,
+	      size_t length, const uint8_t *key);
+
+void
+cast128_set_key(struct cast128_ctx *ctx, const uint8_t *key);
+
+void
+cast128_encrypt(const struct cast128_ctx *ctx,
+		size_t length, uint8_t *dst,
+		const uint8_t *src);
+void
+cast128_decrypt(const struct cast128_ctx *ctx,
+		size_t length, uint8_t *dst,
+		const uint8_t *src);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_CAST128_H_INCLUDED */