1 /* 2 * Copyright (C) 2021 - 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 * 8 * This software is licensed under a dual BSD and GPL v2 license. 9 * See LICENSE file at the root folder of the project. 10 */ 11 #ifndef __MDC2_H__ 12 #define __MDC2_H__ 13 14 /* Include libec for useful types and macros */ 15 #include <libecc/libec.h> 16 17 #define MDC2_STATE_SIZE 16 18 #define MDC2_BLOCK_SIZE 8 19 #define MDC2_DIGEST_SIZE 16 20 #define MDC2_DIGEST_SIZE_BITS 128 21 22 #define MDC2_HASH_MAGIC ((word_t)(0x8296527183648310ULL)) 23 #define MDC2_HASH_CHECK_INITIALIZED(A, ret, err) \ 24 MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == MDC2_HASH_MAGIC), ret, err) 25 26 /* Padding types as described in the informative appendix of 27 * ISO-IEC-10118-2-1994 28 */ 29 typedef enum { 30 ISOIEC10118_TYPE1 = 0, 31 ISOIEC10118_TYPE2 = 1, 32 } padding_type; 33 34 typedef struct { 35 /* Number of bytes processed */ 36 u64 mdc2_total; 37 /* Internal state */ 38 u8 mdc2_state[MDC2_STATE_SIZE]; 39 /* Internal buffer to handle updates in a block */ 40 u8 mdc2_buffer[MDC2_BLOCK_SIZE]; 41 /* Initialization magic value */ 42 word_t magic; 43 /* Padding type, as per ISO-IEC-10118-2-1994 */ 44 padding_type padding; 45 } mdc2_context; 46 47 ATTRIBUTE_WARN_UNUSED_RET int mdc2_set_padding_type(mdc2_context *ctx, 48 padding_type p); 49 50 /* Init hash function. Returns 0 on success, -1 on error. */ 51 ATTRIBUTE_WARN_UNUSED_RET int mdc2_init(mdc2_context *ctx); 52 53 ATTRIBUTE_WARN_UNUSED_RET int mdc2_update(mdc2_context *ctx, const u8 *input, u32 ilen); 54 55 /* Finalize. Returns 0 on success, -1 on error.*/ 56 ATTRIBUTE_WARN_UNUSED_RET int mdc2_final(mdc2_context *ctx, u8 output[MDC2_DIGEST_SIZE]); 57 58 /* 59 * Scattered version performing init/update/finalize on a vector of buffers 60 * 'inputs' with the length of each buffer passed via 'ilens'. The function 61 * loops on pointers in 'inputs' until it finds a NULL pointer. The function 62 * returns 0 on success, -1 on error. 63 */ 64 ATTRIBUTE_WARN_UNUSED_RET int mdc2_scattered(const u8 **inputs, const u32 *ilens, 65 u8 output[MDC2_DIGEST_SIZE], padding_type p); 66 67 /* 68 * Scattered version performing init/update/finalize on a vector of buffers 69 * 'inputs' with the length of each buffer passed via 'ilens'. The function 70 * loops on pointers in 'inputs' until it finds a NULL pointer. The function 71 * returns 0 on success, -1 on error. 72 */ 73 ATTRIBUTE_WARN_UNUSED_RET int mdc2_scattered_padding1(const u8 **inputs, const u32 *ilens, 74 u8 output[MDC2_DIGEST_SIZE]); 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 ATTRIBUTE_WARN_UNUSED_RET int mdc2_scattered_padding2(const u8 **inputs, const u32 *ilens, 83 u8 output[MDC2_DIGEST_SIZE]); 84 /* 85 * Single call version performing init/update/final on given input. 86 * Returns 0 on success, -1 on error. 87 */ 88 ATTRIBUTE_WARN_UNUSED_RET int mdc2(const u8 *input, u32 ilen, u8 output[MDC2_DIGEST_SIZE], padding_type p); 89 90 /* 91 * Single call version performing init/update/final on given input. 92 * Returns 0 on success, -1 on error. 93 */ 94 ATTRIBUTE_WARN_UNUSED_RET int mdc2_padding1(const u8 *input, u32 ilen, u8 output[MDC2_DIGEST_SIZE]); 95 96 /* 97 * Single call version performing init/update/final on given input. 98 * Returns 0 on success, -1 on error. 99 */ 100 ATTRIBUTE_WARN_UNUSED_RET int mdc2_padding2(const u8 *input, u32 ilen, u8 output[MDC2_DIGEST_SIZE]); 101 102 #endif /* __MDC2_H__ */ 103