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Member "littleutils-1.2.5/littleutils/md5.h" (29 Oct 2021, 4612 Bytes) of package /linux/privat/littleutils-1.2.5.tar.lz:


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    1 /* Declaration of functions and data types used for MD5 sum computing
    2    library functions.
    3    Copyright (C) 1995-1997, 1999-2001, 2004-2006, 2008-2018 Free Software
    4    Foundation, Inc.
    5    This file is part of the GNU C Library.
    6 
    7    This program is free software; you can redistribute it and/or modify it
    8    under the terms of the GNU General Public License as published by the
    9    Free Software Foundation; either version 3, or (at your option) any
   10    later version.
   11 
   12    This program is distributed in the hope that it will be useful,
   13    but WITHOUT ANY WARRANTY; without even the implied warranty of
   14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   15    GNU General Public License for more details.
   16 
   17    You should have received a copy of the GNU General Public License
   18    along with this program; if not, see <https://www.gnu.org/licenses/>.  */
   19 
   20 /* Modifications for partial file reads by Brian Lindholm, 2004-2021.  */
   21 
   22 
   23 #ifndef _MD5_H
   24 #define _MD5_H 1
   25 
   26 #include <config.h>
   27 
   28 #if HAVE_INTTYPES_H
   29 # include <inttypes.h>
   30 #endif
   31 #if HAVE_STDINT_H || _LIBC
   32 # include <stdint.h>
   33 #endif
   34 #ifdef HAVE_STDIO_H
   35 # include <stdio.h>
   36 #endif
   37 
   38 #define MD5_DIGEST_SIZE 16
   39 #define MD5_BLOCK_SIZE 64
   40 
   41 #ifndef __GNUC_PREREQ
   42 # if defined __GNUC__ && defined __GNUC_MINOR__
   43 #  define __GNUC_PREREQ(maj, min)                                       \
   44   ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
   45 # else
   46 #  define __GNUC_PREREQ(maj, min) 0
   47 # endif
   48 #endif
   49 
   50 #ifndef __THROW
   51 # if defined __cplusplus && __GNUC_PREREQ (2,8)
   52 #  define __THROW       throw ()
   53 # else
   54 #  define __THROW
   55 # endif
   56 #endif
   57 
   58 #ifndef _LIBC
   59 # define __md5_buffer md5_buffer
   60 # define __md5_finish_ctx md5_finish_ctx
   61 # define __md5_init_ctx md5_init_ctx
   62 # define __md5_process_block md5_process_block
   63 # define __md5_process_bytes md5_process_bytes
   64 # define __md5_read_ctx md5_read_ctx
   65 # define __md5_stream md5_stream
   66 #endif
   67 
   68 /* Structure to save state of computation between the single steps.  */
   69 struct md5_ctx
   70 {
   71   uint32_t A;
   72   uint32_t B;
   73   uint32_t C;
   74   uint32_t D;
   75 
   76   uint32_t total[2];
   77   uint32_t buflen;     /* ≥ 0, ≤ 128 */
   78   uint32_t buffer[32]; /* 128 bytes; the first buflen bytes are in use */
   79 };
   80 
   81 /*
   82  * The following three functions are build up the low level used in
   83  * the functions 'md5_stream' and 'md5_buffer'.
   84  */
   85 
   86 /* Initialize structure containing state of computation.
   87    (RFC 1321, 3.3: Step 3)  */
   88 extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;
   89 
   90 /* Starting with the result of former calls of this function (or the
   91    initialization function update the context for the next LEN bytes
   92    starting at BUFFER.
   93    It is necessary that LEN is a multiple of 64!!! */
   94 extern void __md5_process_block (const void *buffer, size_t len,
   95                                  struct md5_ctx *ctx) __THROW;
   96 
   97 /* Starting with the result of former calls of this function (or the
   98    initialization function update the context for the next LEN bytes
   99    starting at BUFFER.
  100    It is NOT required that LEN is a multiple of 64.  */
  101 extern void __md5_process_bytes (const void *buffer, size_t len,
  102                                  struct md5_ctx *ctx) __THROW;
  103 
  104 /* Process the remaining bytes in the buffer and put result from CTX
  105    in first 16 bytes following RESBUF.  The result is always in little
  106    endian byte order, so that a byte-wise output yields to the wanted
  107    ASCII representation of the message digest.  */
  108 extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;
  109 
  110 
  111 /* Put result from CTX in first 16 bytes following RESBUF.  The result is
  112    always in little endian byte order, so that a byte-wise output yields
  113    to the wanted ASCII representation of the message digest.  */
  114 extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;
  115 
  116 
  117 /* Compute MD5 message digest for LEN bytes beginning at BUFFER.  The
  118    result is always in little endian byte order, so that a byte-wise
  119    output yields to the wanted ASCII representation of the message
  120    digest.  */
  121 extern void *__md5_buffer (const char *buffer, size_t len,
  122                            void *resblock) __THROW;
  123 
  124 /* Compute MD5 message digest for bytes read from STREAM.
  125    STREAM is an open file stream.  Regular files are handled more efficiently.
  126    The contents of STREAM from its current position to its end will be read.
  127    The case that the last operation on STREAM was an 'ungetc' is not supported.
  128    The resulting message digest number will be written into the 16 bytes
  129    beginning at RESBLOCK.  */
  130 extern int __md5_stream (FILE *stream, void *resblock, off_t readbytes) __THROW;
  131 
  132 #endif /* md5.h */