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+/* streamcipher_descriptor.h */
+/*
+    This file is part of the AVR-Crypto-Lib.
+    Copyright (C) 2011  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               stremcipher_descriptor.h
+ * \author             Daniel Otte 
+ * \date               2011-01-15
+ * 
+ * \license        GPLv3 or later
+ * 
+ */
+
+#ifndef STREAMCIPHER_DESCRIPTOR_H_
+#define STREAMCIPHER_DESCRIPTOR_H_
+#include <stdint.h>
+#include <avr/pgmspace.h>
+
+
+#ifndef VOID_FPT
+#define VOID_FPT
+typedef void(*void_fpt)(void);
+#endif
+
+typedef void(*sc_init1_fpt)(const void*, void*); /* key of fixed length, no IV*/
+typedef void(*sc_init2_fpt)(const void*, const void*, void*); /* key and IV of fixed length */
+typedef void(*sc_init3_fpt)(const void*, uint16_t,void*); /* key of variable length, no IV */
+typedef void(*sc_init4_fpt)(const void*, uint16_t,const void*, void*); /* key of variable length, IV of fixed length */
+typedef void(*sc_init5_fpt)(const void*, uint16_t,const void*, uint16_t, void*); /* key and IV of variable length */
+
+typedef uint8_t(*sc_gen1_fpt)(void*); /* return keystream data */
+typedef void(*sc_gen2_fpt)(void*, void*); /* write keystream data to buffer */
+
+typedef uint8_t(*sc_genra1_fpt)(void*, uint64_t); /* return keystream data */
+typedef void(*sc_genra2_fpt)(void*, void*, uint64_t); /* write keystream data to buffer */
+
+
+typedef void(*sc_free_fpt)(void*);
+
+typedef union{
+       void_fpt  initvoid;
+       sc_init1_fpt init1;
+       sc_init2_fpt init2;
+       sc_init3_fpt init3;
+       sc_init4_fpt init4;
+       sc_init5_fpt init5;
+} sc_init_fpt;
+
+typedef union{
+       void_fpt  genvoid;
+       sc_gen1_fpt gen1;
+       sc_gen2_fpt gen2;
+} sc_gen_fpt;
+
+typedef union{
+       void_fpt  genravoid;
+       sc_genra1_fpt genra1;
+       sc_genra2_fpt genra2;
+} sc_genra_fpt;
+
+#define SC_INIT_TYPE   0x07
+#define SC_INIT_TYPE_1 0x00 /* key of fixed length, no IV*/
+#define SC_INIT_TYPE_2 0x02 /* key and IV of fixed length */
+#define SC_INIT_TYPE_3 0x03 /* key of variable length, no IV */
+#define SC_INIT_TYPE_4 0x04 /* key of variable length, IV of fixed length */
+#define SC_INIT_TYPE_5 0x05 /* key and IV of variable length */
+
+#define SC_GEN_TYPE    0x08
+#define SC_GEN_TYPE_1  0x00 /* return data stream byte */
+#define SC_GEN_TYPE_2  0x08 /* write data stream block into buffer */
+
+#define SCDESC_TYPE_STREAMCIPHER 0x03
+
+typedef struct {
+       uint8_t  type; /* 3==streamcipher */
+       uint8_t  flags;
+       PGM_P    name;
+       uint16_t ctxsize_B;
+       uint16_t gensize_b;
+       sc_init_fpt init;
+       sc_gen_fpt  gen;
+       sc_genra_fpt  genra;
+       sc_free_fpt free;
+       PGM_VOID_P valid_keysize_desc;
+       PGM_VOID_P valid_ivsize_desc;
+} scdesc_t; /* streamcipher descriptor type */
+
+typedef struct{
+       const scdesc_t* desc_ptr;
+       uint16_t        keysize;
+       uint16_t        ivsize;
+       uint16_t        index;
+       uint8_t*        buffer;
+       void*           ctx;
+} scgen_ctx_t;
+
+#endif /* STREAMCIPHER_DESCRIPTOR_H_ */
+