1 /* 2 * Copyright (C) 2017 - This file is part of libecc project 3 * 4 * Authors: 5 * Ryad BENADJILA <ryadbenadjila@gmail.com> 6 * Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr> 7 * Jean-Pierre FLORI <jean-pierre.flori@ssi.gouv.fr> 8 * 9 * Contributors: 10 * Nicolas VIVET <nicolas.vivet@ssi.gouv.fr> 11 * Karim KHALFALLAH <karim.khalfallah@ssi.gouv.fr> 12 * 13 * This software is licensed under a dual BSD and GPL v2 license. 14 * See LICENSE file at the root folder of the project. 15 */ 16 #include <libecc/lib_ecc_config.h> 17 #ifdef WITH_HASH_SHA512_256 18 19 #include <libecc/hash/sha512-256.h> 20 21 /* Init hash function. Returns 0 on success, -1 on error. */ 22 int sha512_256_init(sha512_256_context *ctx) 23 { 24 int ret; 25 26 MUST_HAVE((ctx != NULL), ret, err); 27 28 ctx->sha512_total[0] = ctx->sha512_total[1] = 0; 29 ctx->sha512_state[0] = (u64)(0x22312194FC2BF72C); 30 ctx->sha512_state[1] = (u64)(0x9F555FA3C84C64C2); 31 ctx->sha512_state[2] = (u64)(0x2393B86B6F53B151); 32 ctx->sha512_state[3] = (u64)(0x963877195940EABD); 33 ctx->sha512_state[4] = (u64)(0x96283EE2A88EFFE3); 34 ctx->sha512_state[5] = (u64)(0xBE5E1E2553863992); 35 ctx->sha512_state[6] = (u64)(0x2B0199FC2C85B8AA); 36 ctx->sha512_state[7] = (u64)(0x0EB72DDC81C52CA2); 37 38 /* Tell that we are initialized */ 39 ctx->magic = SHA512_256_HASH_MAGIC; 40 ret = 0; 41 42 err: 43 return ret; 44 } 45 46 /* Update hash function. Returns 0 on success, -1 on error. */ 47 int sha512_256_update(sha512_256_context *ctx, const u8 *input, u32 ilen) 48 { 49 int ret; 50 51 SHA512_256_HASH_CHECK_INITIALIZED(ctx, ret, err); 52 53 ret = sha512_core_update(ctx, input, ilen); 54 55 err: 56 return ret; 57 } 58 59 /* 60 * Finalize hash function. Returns 0 on success, -1 on error. 61 */ 62 int sha512_256_final(sha512_256_context *ctx, u8 output[SHA512_256_DIGEST_SIZE]) 63 { 64 int ret; 65 66 SHA512_256_HASH_CHECK_INITIALIZED(ctx, ret, err); 67 ret = sha512_core_final(ctx, output, SHA512_256_DIGEST_SIZE); EG(ret, err); 68 69 ctx->magic = WORD(0); 70 ret = 0; 71 72 err: 73 return ret; 74 } 75 76 /* 77 * Scattered version performing init/update/finalize on a vector of buffers 78 * 'inputs' with the length of each buffer passed via 'ilens'. The function 79 * loops on pointers in 'inputs' until it finds a NULL pointer. The function 80 * returns 0 on success, -1 on error. 81 */ 82 int sha512_256_scattered(const u8 **inputs, const u32 *ilens, 83 u8 output[SHA512_256_DIGEST_SIZE]) 84 { 85 sha512_256_context ctx; 86 int pos = 0; 87 int ret; 88 89 MUST_HAVE((inputs != NULL) && (ilens != NULL) && (output != NULL), ret, err); 90 91 ret = sha512_256_init(&ctx); EG(ret, err); 92 93 while (inputs[pos] != NULL) { 94 ret = sha512_256_update(&ctx, inputs[pos], ilens[pos]); EG(ret, err); 95 pos += 1; 96 } 97 98 ret = sha512_256_final(&ctx, output); 99 100 err: 101 return ret; 102 } 103 104 /* init/update/finalize on a single buffer 'input' of length 'ilen'. */ 105 int sha512_256(const u8 *input, u32 ilen, u8 output[SHA512_256_DIGEST_SIZE]) 106 { 107 sha512_256_context ctx; 108 int ret; 109 110 ret = sha512_256_init(&ctx); EG(ret, err); 111 ret = sha512_256_update(&ctx, input, ilen); EG(ret, err); 112 ret = sha512_256_final(&ctx, output); 113 114 err: 115 return ret; 116 } 117 118 #else /* WITH_HASH_SHA512_256 */ 119 120 /* 121 * Dummy definition to avoid the empty translation unit ISO C warning 122 */ 123 typedef int dummy; 124 #endif /* WITH_HASH_SHA512_256 */ 125