X-Git-Url: https://git.cryptolib.org/?a=blobdiff_plain;ds=inline;f=seed%2Fseed.h;fp=seed%2Fseed.h;h=78d7d59dcb56237d3ac8656bffec232af8cc4577;hb=d32eba56ce10ea6b9eff123b50d9842673b38f2b;hp=0000000000000000000000000000000000000000;hpb=8f855d283a31a468ea014774c4723a8b77b81644;p=avr-crypto-lib.git
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+/* seed.h */
+/*
+ This file is part of the AVR-Crypto-Lib.
+ Copyright (C) 2008 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 .
+*/
+/**
+ * \file seed.h
+ * \author Daniel Otte
+ * \date 2007-06-1
+ * \brief declarations for seed
+ * \par License
+ * GPL
+ *
+ */
+#ifndef SEED_H_
+#define SEED_H_
+
+#include
+/** \typedef seed_ctx_t
+ * \brief SEED context
+ *
+ * A variable of this type may hold the key material for the SEED cipher.
+ * This context is regulary generated by the
+ * void seed_init(const void * key, seed_ctx_t * ctx) function.
+ */
+typedef struct{
+ uint32_t k[4];
+} seed_ctx_t;
+
+/******************************************************************************/
+
+/** \fn void seed_init(const void * key, seed_ctx_t * ctx)
+ * \brief initializes context for SEED operation
+ *
+ * This function copys the key material into a context variable.
+ *
+ * \param key pointer to the key material (128 bit = 16 bytes)
+ * \param ctx pointer to the context (seed_ctx_t)
+ */
+void seed_init(const void * key, seed_ctx_t * ctx);
+
+/** \fn void seed_enc(void * buffer,const seed_ctx_t * ctx)
+ * \brief encrypt a block with SEED
+ *
+ * This function encrypts a block of 64 bits (8 bytes) with the SEED algorithm.
+ * The round keys are computed on demand, so the context is modifyed while
+ * encrypting but the original stated is restored when the function exits.
+ *
+ * \param buffer pointer to the block (64 bit = 8 byte) which will be encrypted
+ * \param ctx pointer to the key material (seed_ctx_t)
+ */
+void seed_enc(void * buffer, const seed_ctx_t * ctx);
+
+
+/** \fn void seed_dec(void * buffer, const seed_ctx_t * ctx)
+ * \brief decrypt a block with SEED
+ *
+ * This function decrypts a block of 64 bits (8 bytes) with the SEED algorithm.
+ * The round keys are computed on demand, so the context is modifyed while
+ * decrypting but the original stated is restored when the function exits.
+ *
+ * \param buffer pointer to the block (64 bit = 8 byte) which will be decrypted
+ * \param ctx pointer to the key material (seed_ctx_t)
+ */
+void seed_dec(void * buffer, const seed_ctx_t * ctx);
+
+
+#endif /*SEED_H_*/