1*f0865ec9SKyle Evans /* 2*f0865ec9SKyle Evans * Copyright (C) 2021 - This file is part of libecc project 3*f0865ec9SKyle Evans * 4*f0865ec9SKyle Evans * Authors: 5*f0865ec9SKyle Evans * Ryad BENADJILA <ryadbenadjila@gmail.com> 6*f0865ec9SKyle Evans * Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr> 7*f0865ec9SKyle Evans * 8*f0865ec9SKyle Evans * This software is licensed under a dual BSD and GPL v2 license. 9*f0865ec9SKyle Evans * See LICENSE file at the root folder of the project. 10*f0865ec9SKyle Evans */ 11*f0865ec9SKyle Evans #ifndef __MD2_H__ 12*f0865ec9SKyle Evans #define __MD2_H__ 13*f0865ec9SKyle Evans 14*f0865ec9SKyle Evans /* Include libec for useful types and macros */ 15*f0865ec9SKyle Evans #include <libecc/libec.h> 16*f0865ec9SKyle Evans 17*f0865ec9SKyle Evans #define MD2_STATE_SIZE 16 18*f0865ec9SKyle Evans #define MD2_BLOCK_SIZE 16 19*f0865ec9SKyle Evans #define MD2_DIGEST_SIZE 16 20*f0865ec9SKyle Evans #define MD2_DIGEST_SIZE_BITS 128 21*f0865ec9SKyle Evans 22*f0865ec9SKyle Evans #define MD2_HASH_MAGIC ((word_t)(0x8432927137264770ULL)) 23*f0865ec9SKyle Evans #define MD2_HASH_CHECK_INITIALIZED(A, ret, err) \ 24*f0865ec9SKyle Evans MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == MD2_HASH_MAGIC), ret, err) 25*f0865ec9SKyle Evans 26*f0865ec9SKyle Evans typedef struct { 27*f0865ec9SKyle Evans /* Number of bytes processed */ 28*f0865ec9SKyle Evans u64 md2_total; 29*f0865ec9SKyle Evans /* Internal state */ 30*f0865ec9SKyle Evans u8 md2_state[MD2_STATE_SIZE]; 31*f0865ec9SKyle Evans /* Internal buffer to handle updates in a block */ 32*f0865ec9SKyle Evans u8 md2_buffer[MD2_BLOCK_SIZE]; 33*f0865ec9SKyle Evans /* Internal buffer to hold the checksum */ 34*f0865ec9SKyle Evans u8 md2_checksum[MD2_BLOCK_SIZE]; 35*f0865ec9SKyle Evans /* Initialization magic value */ 36*f0865ec9SKyle Evans word_t magic; 37*f0865ec9SKyle Evans } md2_context; 38*f0865ec9SKyle Evans 39*f0865ec9SKyle Evans 40*f0865ec9SKyle Evans /* Init hash function. Returns 0 on success, -1 on error. */ 41*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int md2_init(md2_context *ctx); 42*f0865ec9SKyle Evans 43*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int md2_update(md2_context *ctx, const u8 *input, u32 ilen); 44*f0865ec9SKyle Evans 45*f0865ec9SKyle Evans /* Finalize. Returns 0 on success, -1 on error.*/ 46*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int md2_final(md2_context *ctx, u8 output[MD2_DIGEST_SIZE]); 47*f0865ec9SKyle Evans 48*f0865ec9SKyle Evans /* 49*f0865ec9SKyle Evans * Scattered version performing init/update/finalize on a vector of buffers 50*f0865ec9SKyle Evans * 'inputs' with the length of each buffer passed via 'ilens'. The function 51*f0865ec9SKyle Evans * loops on pointers in 'inputs' until it finds a NULL pointer. The function 52*f0865ec9SKyle Evans * returns 0 on success, -1 on error. 53*f0865ec9SKyle Evans */ 54*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int md2_scattered(const u8 **inputs, const u32 *ilens, 55*f0865ec9SKyle Evans u8 output[MD2_DIGEST_SIZE]); 56*f0865ec9SKyle Evans 57*f0865ec9SKyle Evans /* 58*f0865ec9SKyle Evans * Single call version performing init/update/final on given input. 59*f0865ec9SKyle Evans * Returns 0 on success, -1 on error. 60*f0865ec9SKyle Evans */ 61*f0865ec9SKyle Evans ATTRIBUTE_WARN_UNUSED_RET int md2(const u8 *input, u32 ilen, u8 output[MD2_DIGEST_SIZE]); 62*f0865ec9SKyle Evans 63*f0865ec9SKyle Evans #endif /* __MD2_H__ */ 64