1 /********************************************************************** 2 Copyright(c) 2011-2017 Intel Corporation All rights reserved. 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions 6 are met: 7 * Redistributions of source code must retain the above copyright 8 notice, this list of conditions and the following disclaimer. 9 * Redistributions in binary form must reproduce the above copyright 10 notice, this list of conditions and the following disclaimer in 11 the documentation and/or other materials provided with the 12 distribution. 13 * Neither the name of Intel Corporation nor the names of its 14 contributors may be used to endorse or promote products derived 15 from this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 **********************************************************************/ 29 30 /* 31 * mh_sha256_finalize_base.c contains the prototypes of mh_sha256_finalize_XXX 32 * and mh_sha256_tail_XXX. Default definitions are base type which generates 33 * mh_sha256_finalize_base and mh_sha256_tail_base. Other types are generated 34 * through different predefined macros by mh_sha256.c. 35 * mh_sha256_tail is used to calculate the last incomplete block of input 36 * data. mh_sha256_finalize is the mh_sha256_ctx wrapper of mh_sha256_tail. 37 */ 38 #ifndef MH_SHA256_FINALIZE_FUNCTION 39 #include <string.h> 40 #include "mh_sha256_internal.h" 41 42 #define MH_SHA256_FINALIZE_FUNCTION mh_sha256_finalize_base 43 #define MH_SHA256_TAIL_FUNCTION mh_sha256_tail_base 44 #define MH_SHA256_BLOCK_FUNCTION mh_sha256_block_base 45 #define MH_SHA256_FINALIZE_SLVER 46 #endif 47 48 void MH_SHA256_TAIL_FUNCTION(uint8_t * partial_buffer, uint32_t total_len, 49 uint32_t(*mh_sha256_segs_digests)[HASH_SEGS], 50 uint8_t * frame_buffer, uint32_t digests[SHA256_DIGEST_WORDS]) 51 { 52 uint64_t partial_buffer_len, len_in_bit; 53 54 partial_buffer_len = total_len % MH_SHA256_BLOCK_SIZE; 55 56 // Padding the first block 57 partial_buffer[partial_buffer_len] = 0x80; 58 partial_buffer_len++; 59 memset(partial_buffer + partial_buffer_len, 0, 60 MH_SHA256_BLOCK_SIZE - partial_buffer_len); 61 62 // Calculate the first block without total_length if padding needs 2 block 63 if (partial_buffer_len > (MH_SHA256_BLOCK_SIZE - 8)) { 64 MH_SHA256_BLOCK_FUNCTION(partial_buffer, mh_sha256_segs_digests, frame_buffer, 65 1); 66 //Padding the second block 67 memset(partial_buffer, 0, MH_SHA256_BLOCK_SIZE); 68 } 69 //Padding the block 70 len_in_bit = to_be64((uint64_t) total_len * 8); 71 *(uint64_t *) (partial_buffer + MH_SHA256_BLOCK_SIZE - 8) = len_in_bit; 72 MH_SHA256_BLOCK_FUNCTION(partial_buffer, mh_sha256_segs_digests, frame_buffer, 1); 73 74 //Calculate multi-hash SHA256 digests (segment digests as input message) 75 sha256_for_mh_sha256((uint8_t *) mh_sha256_segs_digests, digests, 76 4 * SHA256_DIGEST_WORDS * HASH_SEGS); 77 78 return; 79 } 80 81 int MH_SHA256_FINALIZE_FUNCTION(struct mh_sha256_ctx *ctx, void *mh_sha256_digest) 82 { 83 uint8_t i; 84 uint8_t *partial_block_buffer; 85 uint64_t total_len; 86 uint32_t(*mh_sha256_segs_digests)[HASH_SEGS]; 87 uint8_t *aligned_frame_buffer; 88 89 if (ctx == NULL) 90 return MH_SHA256_CTX_ERROR_NULL; 91 92 total_len = ctx->total_length; 93 partial_block_buffer = ctx->partial_block_buffer; 94 95 /* mh_sha256 tail */ 96 aligned_frame_buffer = (uint8_t *) ALIGN_64(ctx->frame_buffer); 97 mh_sha256_segs_digests = (uint32_t(*)[HASH_SEGS]) ctx->mh_sha256_interim_digests; 98 99 MH_SHA256_TAIL_FUNCTION(partial_block_buffer, total_len, mh_sha256_segs_digests, 100 aligned_frame_buffer, ctx->mh_sha256_digest); 101 102 /* Output the digests of mh_sha256 */ 103 if (mh_sha256_digest != NULL) { 104 for (i = 0; i < SHA256_DIGEST_WORDS; i++) 105 ((uint32_t *) mh_sha256_digest)[i] = ctx->mh_sha256_digest[i]; 106 } 107 108 return MH_SHA256_CTX_ERROR_NONE; 109 } 110 111 #ifdef MH_SHA256_FINALIZE_SLVER 112 struct slver { 113 uint16_t snum; 114 uint8_t ver; 115 uint8_t core; 116 }; 117 118 // Version info 119 struct slver mh_sha256_finalize_base_slver_000002bb; 120 struct slver mh_sha256_finalize_base_slver = { 0x02bb, 0x00, 0x00 }; 121 #endif 122