+++ /dev/null
-/* -*-c-*-
- *
- * $Id: cbc.h,v 1.4 2004/04/08 01:36:15 mdw Exp $
- *
- * Ciphertext block chaining for block ciphers
- *
- * (c) 1999 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-#ifndef CATACOMB_CBC_H
-#define CATACOMB_CBC_H
-
-#ifdef __cplusplus
- extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <stddef.h>
-
-#include <mLib/bits.h>
-
-#ifndef CATACOMB_GCIPHER_H
-# include "gcipher.h"
-#endif
-
-/*----- Macros ------------------------------------------------------------*/
-
-/* --- @CBC_DECL@ --- *
- *
- * Arguments: @PRE@, @pre@ = prefixes for the underlying block cipher
- *
- * Use: Creates declarations for CBC stealing mode.
- */
-
-#define CBC_DECL(PRE, pre) \
- \
-/* --- Cipher block chaining context --- */ \
- \
-typedef struct pre##_cbcctx { \
- pre##_ctx ctx; /* Underlying cipher context */ \
- uint32 iv[PRE##_BLKSZ / 4]; /* Previous ciphertext or IV */ \
-} pre##_cbcctx; \
- \
-/* --- @pre_cbcgetiv@ --- * \
- * \
- * Arguments: @const pre_cbcctx *ctx@ = pointer to CBC context block \
- * @void *iv@ = pointer to output data block \
- * \
- * Returns: --- \
- * \
- * Use: Reads the currently set IV. Reading and setting an IV \
- * is transparent to the CBC encryption or decryption \
- * process. \
- */ \
- \
-extern void pre##_cbcgetiv(const pre##_cbcctx */*ctx*/, \
- void */*iv*/); \
- \
-/* --- @pre_cbcsetiv@ --- * \
- * \
- * Arguments: @pre_cbcctx *ctx@ = pointer to CBC context block \
- * @cnost void *iv@ = pointer to IV to set \
- * \
- * Returns: --- \
- * \
- * Use: Sets the IV to use for subsequent encryption. \
- */ \
- \
-extern void pre##_cbcsetiv(pre##_cbcctx */*ctx*/, \
- const void */*iv*/); \
- \
-/* --- @pre_cbcsetkey@ --- * \
- * \
- * Arguments: @pre_cbcctx *ctx@ = pointer to CBC context block \
- * @const pre_ctx *k@ = pointer to cipher context \
- * \
- * Returns: --- \
- * \
- * Use: Sets the CBC context to use a different cipher key. \
- */ \
- \
-extern void pre##_cbcsetkey(pre##_cbcctx */*ctx*/, \
- const pre##_ctx */*k*/); \
- \
-/* --- @pre_cbcinit@ --- * \
- * \
- * Arguments: @pre_cbcctx *ctx@ = pointer to cipher context \
- * @const void *key@ = pointer to the key buffer \
- * @size_t sz@ = size of the key \
- * @const void *iv@ = pointer to initialization vector \
- * \
- * Returns: --- \
- * \
- * Use: Initializes a CBC context ready for use. The @iv@ \
- * argument may be passed as a null pointer to set a zero \
- * IV. Apart from that, this call is equivalent to calls \
- * to @pre_init@, @pre_cbcsetkey@ and @pre_cbcsetiv@. \
- */ \
- \
-extern void pre##_cbcinit(pre##_cbcctx */*ctx*/, \
- const void */*key*/, size_t /*sz*/, \
- const void */*iv*/); \
- \
-/* --- @pre_cbcencrypt@ --- * \
- * \
- * Arguments: @pre_cbcctx *ctx@ = pointer to CBC context block \
- * @const void *src@ = pointer to source data \
- * @void *dest@ = pointer to destination data \
- * @size_t sz@ = size of block to be encrypted \
- * \
- * Returns: --- \
- * \
- * Use: Encrypts a block with a block cipher in CBC mode, with \
- * ciphertext stealing and other clever tricks. \
- * Essentially, data can be encrypted in arbitrary sized \
- * chunks, although decryption must use the same chunks. \
- */ \
- \
-extern void pre##_cbcencrypt(pre##_cbcctx */*ctx*/, \
- const void */*src*/, void */*dest*/, \
- size_t /*sz*/); \
- \
-/* --- @pre_cbcdecrypt@ --- * \
- * \
- * Arguments: @pre_cbcctx *ctx@ = pointer to CBC context block \
- * @const void *src@ = pointer to source data \
- * @void *dest@ = pointer to destination data \
- * @size_t sz@ = size of block to be encrypted \
- * \
- * Returns: --- \
- * \
- * Use: Decrypts a block with a block cipher in CBC mode, with \
- * ciphertext stealing and other clever tricks. \
- * Essentially, data can be encrypted in arbitrary sized \
- * chunks, although decryption must use the same chunks. \
- */ \
- \
-extern void pre##_cbcdecrypt(pre##_cbcctx */*ctx*/, \
- const void */*src*/, void */*dest*/, \
- size_t /*sz*/); \
- \
-/* --- Generic cipher interface --- */ \
- \
-extern const gccipher pre##_cbc;
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
- }
-#endif
-
-#endif
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