1 /* Declarations of functions and data types used for MD4 sum 2 library functions. 3 Copyright (C) 2000-2001, 2003, 2005, 2008-2021 Free Software Foundation, 4 Inc. 5 6 This file is free software: you can redistribute it and/or modify 7 it under the terms of the GNU Lesser General Public License as 8 published by the Free Software Foundation; either version 2.1 of the 9 License, or (at your option) any later version. 10 11 This file is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public License 17 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 18 19 #ifndef MD4_H 20 # define MD4_H 1 21 22 # include <stdio.h> 23 # include <stdint.h> 24 25 # ifdef __cplusplus 26 extern "C" { 27 # endif 28 29 # define MD4_DIGEST_SIZE 16 30 31 /* Structure to save state of computation between the single steps. */ 32 struct md4_ctx 33 { 34 uint32_t A; 35 uint32_t B; 36 uint32_t C; 37 uint32_t D; 38 39 uint32_t total[2]; 40 uint32_t buflen; 41 uint32_t buffer[32]; 42 }; 43 44 45 /* Initialize structure containing state of computation. */ 46 extern void md4_init_ctx (struct md4_ctx *ctx); 47 48 /* Starting with the result of former calls of this function (or the 49 initialization function update the context for the next LEN bytes 50 starting at BUFFER. 51 It is necessary that LEN is a multiple of 64!!! */ 52 extern void md4_process_block (const void *buffer, size_t len, 53 struct md4_ctx *ctx); 54 55 /* Starting with the result of former calls of this function (or the 56 initialization function update the context for the next LEN bytes 57 starting at BUFFER. 58 It is NOT required that LEN is a multiple of 64. */ 59 extern void md4_process_bytes (const void *buffer, size_t len, 60 struct md4_ctx *ctx); 61 62 /* Process the remaining bytes in the buffer and put result from CTX 63 in first 16 bytes following RESBUF. The result is always in little 64 endian byte order, so that a byte-wise output yields to the wanted 65 ASCII representation of the message digest. */ 66 extern void *md4_finish_ctx (struct md4_ctx *ctx, void *restrict resbuf); 67 68 69 /* Put result from CTX in first 16 bytes following RESBUF. The result is 70 always in little endian byte order, so that a byte-wise output yields 71 to the wanted ASCII representation of the message digest. */ 72 extern void *md4_read_ctx (const struct md4_ctx *ctx, void *restrict resbuf); 73 74 75 /* Compute MD4 message digest for LEN bytes beginning at BUFFER. The 76 result is always in little endian byte order, so that a byte-wise 77 output yields to the wanted ASCII representation of the message 78 digest. */ 79 extern void *md4_buffer (const char *buffer, size_t len, 80 void *restrict resblock); 81 82 83 /* Compute MD4 message digest for bytes read from STREAM. The 84 resulting message digest number will be written into the 16 bytes 85 beginning at RESBLOCK. */ 86 extern int md4_stream (FILE * stream, void *resblock); 87 88 89 # ifdef __cplusplus 90 } 91 # endif 92 93 #endif