--- /dev/null
+/* groestl_small.h */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)
+
+ 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/>.
+*/
+/*
+ * \file groestl_small.h
+ * \author Daniel Otte
+ * \email daniel.otte@rub.de
+ * \date 2009-05-19
+ * \license GPLv3 or later
+ *
+ */
+#ifndef GROESTL_SMALL_H_
+#define GROESTL_SMALL_H_
+
+#include <stdint.h>
+
+#define GROESTL_SMALL_BLOCKSIZE 512
+#define GROESTL_SMALL_BLOCKSIZE_B ((GROESTL_SMALL_BLOCKSIZE+7)/8)
+#define GROESTL224_BLOCKSIZE GROESTL_SMALL_BLOCKSIZE
+#define GROESTL224_BLOCKSIZE_B GROESTL_SMALL_BLOCKSIZE_B
+#define GROESTL256_BLOCKSIZE GROESTL_SMALL_BLOCKSIZE
+#define GROESTL256_BLOCKSIZE_B GROESTL_SMALL_BLOCKSIZE_B
+
+typedef struct {
+ uint8_t h[8*8];
+ uint32_t counter;
+} groestl_small_ctx_t;
+
+typedef groestl_small_ctx_t groestl224_ctx_t;
+typedef groestl_small_ctx_t groestl256_ctx_t;
+
+void groestl224_init(groestl224_ctx_t* ctx);
+void groestl256_init(groestl256_ctx_t* ctx);
+
+void groestl_small_nextBlock(groestl_small_ctx_t* ctx, const void* block);
+void groestl_small_lastBlock(groestl_small_ctx_t* ctx, const void* block, uint16_t length_b);
+
+void groestl224_nextBlock(groestl224_ctx_t* ctx, const void* block);
+void groestl224_lastBlock(groestl224_ctx_t* ctx, const void* block, uint16_t length_b);
+
+void groestl256_nextBlock(groestl256_ctx_t* ctx, const void* block);
+void groestl256_lastBlock(groestl256_ctx_t* ctx, const void* block, uint16_t length_b);
+
+void groestl224_ctx2hash(void* dest, const groestl224_ctx_t* ctx);
+void groestl256_ctx2hash(void* dest, const groestl256_ctx_t* ctx);
+
+void groestl224(void* dest, const void* msg, uint32_t length_b);
+void groestl256(void* dest, const void* msg, uint32_t length_b);
+
+#endif /* GROESTL_GROESTL_H_ */