1 /* md5.h 2 3 The MD5 hash function, described in RFC 1321. 4 5 Copyright (C) 2001 Niels Möller 6 7 This file is part of GNU Nettle. 8 9 GNU Nettle is free software: you can redistribute it and/or 10 modify it under the terms of either: 11 12 * the GNU Lesser General Public License as published by the Free 13 Software Foundation; either version 3 of the License, or (at your 14 option) any later version. 15 16 or 17 18 * the GNU General Public License as published by the Free 19 Software Foundation; either version 2 of the License, or (at your 20 option) any later version. 21 22 or both in parallel, as here. 23 24 GNU Nettle is distributed in the hope that it will be useful, 25 but WITHOUT ANY WARRANTY; without even the implied warranty of 26 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 27 General Public License for more details. 28 29 You should have received copies of the GNU General Public License and 30 the GNU Lesser General Public License along with this program. If 31 not, see http://www.gnu.org/licenses/. 32 */ 33 34 #ifndef NETTLE_MD5_H_INCLUDED 35 #define NETTLE_MD5_H_INCLUDED 36 37 #include "nettle-types.h" 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* Name mangling */ 44 #define md5_init nettle_md5_init 45 #define md5_update nettle_md5_update 46 #define md5_digest nettle_md5_digest 47 48 #define MD5_DIGEST_SIZE 16 49 #define MD5_BLOCK_SIZE 64 50 /* For backwards compatibility */ 51 #define MD5_DATA_SIZE MD5_BLOCK_SIZE 52 53 /* Digest is kept internally as 4 32-bit words. */ 54 #define _MD5_DIGEST_LENGTH 4 55 56 struct md5_ctx 57 { 58 uint32_t state[_MD5_DIGEST_LENGTH]; 59 uint64_t count; /* Block count */ 60 unsigned index; /* Into buffer */ 61 uint8_t block[MD5_BLOCK_SIZE]; /* Block buffer */ 62 }; 63 64 void 65 md5_init(struct md5_ctx *ctx); 66 67 void 68 md5_update(struct md5_ctx *ctx, 69 size_t length, 70 const uint8_t *data); 71 72 void 73 md5_digest(struct md5_ctx *ctx, 74 size_t length, 75 uint8_t *digest); 76 77 /* Internal compression function. STATE points to 4 uint32_t words, 78 and DATA points to 64 bytes of input data, possibly unaligned. */ 79 void 80 nettle_md5_compress(uint32_t *state, const uint8_t *data); 81 82 #define _nettle_md5_compress nettle_md5_compress 83 84 #ifdef __cplusplus 85 } 86 #endif 87 88 #endif /* NETTLE_MD5_H_INCLUDED */ 89