/* * Copyright (c) 2010 Apple Inc. All Rights Reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. * * Tom St Denis, tomstdenis@gmail.com, http://libtom.org */ #ifndef LTC_HASHCOMMON_H_ #define LTC_HASHCOMMON_H_ /* a simple macro for making hash "process" functions */ #define LTC_HASH_PROCESS(func_name, compress_name, state_var, field, block_size) \ int func_name (state_var *ctx, const unsigned char *in, unsigned long inlen) \ { \ unsigned long n; \ int err; \ \ \ LTC_ARGCHK(ctx != NULL); \ LTC_ARGCHK(in != NULL); \ \ \ if (ctx->curlen > sizeof(ctx->buf)) { \ return CRYPT_INVALID_ARG; \ } \ if ((ctx->length + inlen) < ctx->length) { \ return CRYPT_HASH_OVERFLOW; \ } \ while (inlen > 0) { \ if (ctx->curlen == 0 && inlen >= block_size) { \ if ((err = compress_name (ctx, in)) != CRYPT_OK) { \ return err; \ } \ ctx->length += block_size * 8; \ in += block_size; \ inlen -= block_size; \ } else { \ n = MIN(inlen, (block_size - ctx->curlen)); \ memcpy(ctx->buf + ctx->curlen, in, (size_t)n); \ ctx->curlen += n; \ in += n; \ inlen -= n; \ if (ctx->curlen == block_size) { \ if ((err = compress_name (ctx, ctx->buf)) != CRYPT_OK) { \ return err; \ } \ ctx->length += 8*block_size; \ ctx->curlen = 0; \ } \ } \ } \ return CRYPT_OK; \ } #endif /* LTC_HASHCOMMON_H_ */