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 __MD2_H__ 12 #define __MD2_H__ 13 14 /* Include libec for useful types and macros */ 15 #include <libecc/libec.h> 16 17 #define MD2_STATE_SIZE 16 18 #define MD2_BLOCK_SIZE 16 19 #define MD2_DIGEST_SIZE 16 20 #define MD2_DIGEST_SIZE_BITS 128 21 22 #define MD2_HASH_MAGIC ((word_t)(0x8432927137264770ULL)) 23 #define MD2_HASH_CHECK_INITIALIZED(A, ret, err) \ 24 MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == MD2_HASH_MAGIC), ret, err) 25 26 typedef struct { 27 /* Number of bytes processed */ 28 u64 md2_total; 29 /* Internal state */ 30 u8 md2_state[MD2_STATE_SIZE]; 31 /* Internal buffer to handle updates in a block */ 32 u8 md2_buffer[MD2_BLOCK_SIZE]; 33 /* Internal buffer to hold the checksum */ 34 u8 md2_checksum[MD2_BLOCK_SIZE]; 35 /* Initialization magic value */ 36 word_t magic; 37 } md2_context; 38 39 40 /* Init hash function. Returns 0 on success, -1 on error. */ 41 ATTRIBUTE_WARN_UNUSED_RET int md2_init(md2_context *ctx); 42 43 ATTRIBUTE_WARN_UNUSED_RET int md2_update(md2_context *ctx, const u8 *input, u32 ilen); 44 45 /* Finalize. Returns 0 on success, -1 on error.*/ 46 ATTRIBUTE_WARN_UNUSED_RET int md2_final(md2_context *ctx, u8 output[MD2_DIGEST_SIZE]); 47 48 /* 49 * Scattered version performing init/update/finalize on a vector of buffers 50 * 'inputs' with the length of each buffer passed via 'ilens'. The function 51 * loops on pointers in 'inputs' until it finds a NULL pointer. The function 52 * returns 0 on success, -1 on error. 53 */ 54 ATTRIBUTE_WARN_UNUSED_RET int md2_scattered(const u8 **inputs, const u32 *ilens, 55 u8 output[MD2_DIGEST_SIZE]); 56 57 /* 58 * Single call version performing init/update/final on given input. 59 * Returns 0 on success, -1 on error. 60 */ 61 ATTRIBUTE_WARN_UNUSED_RET int md2(const u8 *input, u32 ilen, u8 output[MD2_DIGEST_SIZE]); 62 63 #endif /* __MD2_H__ */ 64