LXR linux/arch/x86/crypto/sha256-mb/sha256_mb

   1/*
   2 * Header file for multi buffer SHA256 context
   3 *
   4 * This file is provided under a dual BSD/GPLv2 license.  When using or
   5 * redistributing this file, you may do so under either license.
   6 *
   7 * GPL LICENSE SUMMARY
   8 *
   9 *  Copyright(c) 2016 Intel Corporation.
  10 *
  11 *  This program is free software; you can redistribute it and/or modify
  12 *  it under the terms of version 2 of the GNU General Public License as
  13 *  published by the Free Software Foundation.
  14 *
  15 *  This program is distributed in the hope that it will be useful, but
  16 *  WITHOUT ANY WARRANTY; without even the implied warranty of
  17 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18 *  General Public License for more details.
  19 *
  20 *  Contact Information:
  21 *      Megha Dey <megha.dey@linux.intel.com>
  22 *
  23 *  BSD LICENSE
  24 *
  25 *  Copyright(c) 2016 Intel Corporation.
  26 *
  27 *  Redistribution and use in source and binary forms, with or without
  28 *  modification, are permitted provided that the following conditions
  29 *  are met:
  30 *
  31 *    * Redistributions of source code must retain the above copyright
  32 *      notice, this list of conditions and the following disclaimer.
  33 *    * Redistributions in binary form must reproduce the above copyright
  34 *      notice, this list of conditions and the following disclaimer in
  35 *      the documentation and/or other materials provided with the
  36 *      distribution.
  37 *    * Neither the name of Intel Corporation nor the names of its
  38 *      contributors may be used to endorse or promote products derived
  39 *      from this software without specific prior written permission.
  40 *
  41 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  42 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  43 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  44 *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  45 *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  46 *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  47 *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  48 *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  49 *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  50 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  51 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  52 */
  53
  54#ifndef _SHA_MB_CTX_INTERNAL_H
  55#define _SHA_MB_CTX_INTERNAL_H
  56
  57#include "sha256_mb_mgr.h"
  58
  59#define HASH_UPDATE          0x00
  60#define HASH_FIRST           0x01
  61#define HASH_LAST            0x02
  62#define HASH_ENTIRE          0x03
  63#define HASH_DONE            0x04
  64#define HASH_FINAL           0x08
  65
  66#define HASH_CTX_STS_IDLE       0x00
  67#define HASH_CTX_STS_PROCESSING 0x01
  68#define HASH_CTX_STS_LAST       0x02
  69#define HASH_CTX_STS_COMPLETE   0x04
  70
  71enum hash_ctx_error {
  72        HASH_CTX_ERROR_NONE               =  0,
  73        HASH_CTX_ERROR_INVALID_FLAGS      = -1,
  74        HASH_CTX_ERROR_ALREADY_PROCESSING = -2,
  75        HASH_CTX_ERROR_ALREADY_COMPLETED  = -3,
  76
  77#ifdef HASH_CTX_DEBUG
  78        HASH_CTX_ERROR_DEBUG_DIGEST_MISMATCH = -4,
  79#endif
  80};
  81
  82
  83#define hash_ctx_user_data(ctx)  ((ctx)->user_data)
  84#define hash_ctx_digest(ctx)     ((ctx)->job.result_digest)
  85#define hash_ctx_processing(ctx) ((ctx)->status & HASH_CTX_STS_PROCESSING)
  86#define hash_ctx_complete(ctx)   ((ctx)->status == HASH_CTX_STS_COMPLETE)
  87#define hash_ctx_status(ctx)     ((ctx)->status)
  88#define hash_ctx_error(ctx)      ((ctx)->error)
  89#define hash_ctx_init(ctx) \
  90        do { \
  91                (ctx)->error = HASH_CTX_ERROR_NONE; \
  92                (ctx)->status = HASH_CTX_STS_COMPLETE; \
  93        } while (0)
  94
  95
  96/* Hash Constants and Typedefs */
  97#define SHA256_DIGEST_LENGTH        8
  98#define SHA256_LOG2_BLOCK_SIZE        6
  99
 100#define SHA256_PADLENGTHFIELD_SIZE    8
 101
 102#ifdef SHA_MB_DEBUG
 103#define assert(expr) \
 104do { \
 105        if (unlikely(!(expr))) { \
 106                printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
 107                #expr, __FILE__, __func__, __LINE__); \
 108        } \
 109} while (0)
 110#else
 111#define assert(expr) do {} while (0)
 112#endif
 113
 114struct sha256_ctx_mgr {
 115        struct sha256_mb_mgr mgr;
 116};
 117
 118/* typedef struct sha256_ctx_mgr sha256_ctx_mgr; */
 119
 120struct sha256_hash_ctx {
 121        /* Must be at struct offset 0 */
 122        struct job_sha256       job;
 123        /* status flag */
 124        int status;
 125        /* error flag */
 126        int error;
 127
 128        uint64_t        total_length;
 129        const void      *incoming_buffer;
 130        uint32_t        incoming_buffer_length;
 131        uint8_t         partial_block_buffer[SHA256_BLOCK_SIZE * 2];
 132        uint32_t        partial_block_buffer_length;
 133        void            *user_data;
 134};
 135
 136#endif
 137