1 /* Declaration of functions and data types used for MD5 sum computing 2 library functions. 3 Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Library General Public License as 8 published by the Free Software Foundation; either version 2 of the 9 License, or (at your option) any later version. 10 11 The GNU C Library 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 GNU 14 Library General Public License for more details. 15 16 You should have received a copy of the GNU Library General Public 17 License along with the GNU C Library; see the file COPYING.LIB. If not, 18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. */ 20 21 #ifndef NEON_MD5_H 22 #define NEON_MD5_H 1 23 24 #include <stdio.h> 25 26 #if defined HAVE_LIMITS_H || _LIBC 27 # include <limits.h> 28 #endif 29 30 /* The following contortions are an attempt to use the C preprocessor 31 to determine an unsigned integral type that is 32 bits wide. An 32 alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but 33 doing that would require that the configure script compile and *run* 34 the resulting executable. Locally running cross-compiled executables 35 is usually not possible. */ 36 37 #ifdef _LIBC 38 # include <sys/types.h> 39 typedef u_int32_t md5_uint32; 40 #else 41 # if defined __STDC__ && __STDC__ 42 # define UINT_MAX_32_BITS 4294967295U 43 # else 44 # define UINT_MAX_32_BITS 0xFFFFFFFF 45 # endif 46 47 /* If UINT_MAX isn't defined, assume it's a 32-bit type. 48 This should be valid for all systems GNU cares about because 49 that doesn't include 16-bit systems, and only modern systems 50 (that certainly have <limits.h>) have 64+-bit integral types. */ 51 52 # ifndef UINT_MAX 53 # define UINT_MAX UINT_MAX_32_BITS 54 # endif 55 56 # if UINT_MAX == UINT_MAX_32_BITS 57 typedef unsigned int md5_uint32; 58 # else 59 # if USHRT_MAX == UINT_MAX_32_BITS 60 typedef unsigned short md5_uint32; 61 # else 62 # if ULONG_MAX == UINT_MAX_32_BITS 63 typedef unsigned long md5_uint32; 64 # else 65 /* The following line is intended to evoke an error. 66 Using #error is not portable enough. */ 67 "Cannot determine unsigned 32-bit data type." 68 # endif 69 # endif 70 # endif 71 #endif 72 73 #undef __P 74 #if defined (__STDC__) && __STDC__ 75 # define __P(x) x 76 #else 77 # define __P(x) () 78 #endif 79 80 /* Structure to save state of computation between the single steps. */ 81 struct ne_md5_ctx 82 { 83 md5_uint32 A; 84 md5_uint32 B; 85 md5_uint32 C; 86 md5_uint32 D; 87 88 md5_uint32 total[2]; 89 md5_uint32 buflen; 90 char buffer[128]; 91 }; 92 93 /* 94 * The following three functions are build up the low level used in 95 * the functions `md5_stream' and `md5_buffer'. 96 */ 97 98 /* Initialize structure containing state of computation. 99 (RFC 1321, 3.3: Step 3) */ 100 extern void ne_md5_init_ctx __P ((struct ne_md5_ctx *ctx)); 101 102 /* Starting with the result of former calls of this function (or the 103 initialization function update the context for the next LEN bytes 104 starting at BUFFER. 105 It is necessary that LEN is a multiple of 64!!! */ 106 extern void ne_md5_process_block __P ((const void *buffer, size_t len, 107 struct ne_md5_ctx *ctx)); 108 109 /* Starting with the result of former calls of this function (or the 110 initialization function update the context for the next LEN bytes 111 starting at BUFFER. 112 It is NOT required that LEN is a multiple of 64. */ 113 extern void ne_md5_process_bytes __P ((const void *buffer, size_t len, 114 struct ne_md5_ctx *ctx)); 115 116 /* Process the remaining bytes in the buffer and put result from CTX 117 in first 16 bytes following RESBUF. The result is always in little 118 endian byte order, so that a byte-wise output yields to the wanted 119 ASCII representation of the message digest. 120 121 IMPORTANT: On some systems it is required that RESBUF is correctly 122 aligned for a 32 bits value. */ 123 extern void *ne_md5_finish_ctx __P ((struct ne_md5_ctx *ctx, void *resbuf)); 124 125 126 /* Put result from CTX in first 16 bytes following RESBUF. The result is 127 always in little endian byte order, so that a byte-wise output yields 128 to the wanted ASCII representation of the message digest. 129 130 IMPORTANT: On some systems it is required that RESBUF is correctly 131 aligned for a 32 bits value. */ 132 extern void *ne_md5_read_ctx __P ((const struct ne_md5_ctx *ctx, void *resbuf)); 133 134 135 /* Compute MD5 message digest for bytes read from STREAM. The 136 resulting message digest number will be written into the 16 bytes 137 beginning at RESBLOCK. */ 138 extern int ne_md5_stream __P ((FILE *stream, void *resblock)); 139 140 /* MD5 ascii->binary conversion */ 141 void ne_md5_to_ascii(const unsigned char md5_buf[16], char *buffer); 142 void ne_ascii_to_md5(const char *buffer, unsigned char md5_buf[16]); 143 144 #endif /* NEON_MD5_H */ 145