lib/libc/md/mdXhl.c

   1 /*      $NetBSD: mdXhl.c,v 1.10 2012/06/25 22:32:44 abs Exp $   */
   2
   3 /*
   4  * ----------------------------------------------------------------------------
   5  * "THE BEER-WARE LICENSE" (Revision 42):
   6  * <phk@login.dkuug.dk> wrote this file.  As long as you retain this notice you
   7  * can do whatever you want with this stuff. If we meet some day, and you think
   8  * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
   9  * ----------------------------------------------------------------------------
  10  *
  11  * from FreeBSD Id: mdXhl.c,v 1.8 1996/10/25 06:48:12 bde Exp
  12  */
  13
  14 /*
  15  * Modified April 29, 1997 by Jason R. Thorpe <thorpej@NetBSD.org>
  16  */
  17
  18 #if HAVE_NBTOOL_CONFIG_H
  19 #include "nbtool_config.h"
  20 #endif
  21
  22 #define CONCAT(x,y)     __CONCAT(x,y)
  23 #define MDNAME(x)       CONCAT(MDALGORITHM,x)
  24
  25 #if !defined(_KERNEL) && defined(__weak_alias) && !defined(HAVE_NBTOOL_CONFIG_H)
  26 #define WA(a,b) __weak_alias(a,b)
  27 WA(MDNAME(End),CONCAT(_,MDNAME(End)))
  28 WA(MDNAME(File),CONCAT(_,MDNAME(File)))
  29 WA(MDNAME(Data),CONCAT(_,MDNAME(Data)))
  30 #undef WA
  31 #endif
  32
  33 #include "namespace.h"
  34
  35 #include <sys/types.h>
  36
  37 #include MDINCLUDE
  38 #include <assert.h>
  39 #include <fcntl.h>
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <unistd.h>
  44
  45
  46
  47 char *
  48 MDNAME(End)(MDNAME(_CTX) *ctx, char *buf)
  49 {
  50         int i;
  51         unsigned char digest[16];
  52         static const char hex[]="0123456789abcdef";
  53
  54         _DIAGASSERT(ctx != 0);
  55
  56         if (buf == NULL)
  57                 buf = malloc(33);
  58         if (buf == NULL)
  59                 return (NULL);
  60
  61         MDNAME(Final)(digest, ctx);
  62
  63         for (i = 0; i < 16; i++) {
  64                 buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
  65                 buf[i+i+1] = hex[digest[i] & 0x0f];
  66         }
  67
  68         buf[i+i] = '\0';
  69         return (buf);
  70 }
  71
  72 char *
  73 MDNAME(File)(const char *filename, char *buf)
  74 {
  75         unsigned char buffer[BUFSIZ];
  76         MDNAME(_CTX) ctx;
  77         int f, j;
  78         ssize_t i;
  79
  80         _DIAGASSERT(filename != 0);
  81         /* buf may be NULL */
  82
  83         MDNAME(Init)(&ctx);
  84         f = open(filename, O_RDONLY, 0666);
  85         if (f < 0)
  86                 return NULL;
  87
  88         while ((i = read(f, buffer, sizeof(buffer))) > 0)
  89                 MDNAME(Update)(&ctx, buffer, (unsigned int)i);
  90
  91         j = errno;
  92         close(f);
  93         errno = j;
  94
  95         if (i < 0)
  96                 return NULL;
  97
  98         return (MDNAME(End)(&ctx, buf));
  99 }
 100
 101 char *
 102 MDNAME(Data)(const unsigned char *data, unsigned int len, char *buf)
 103 {
 104         MDNAME(_CTX) ctx;
 105
 106         _DIAGASSERT(data != 0);
 107
 108         MDNAME(Init)(&ctx);
 109         MDNAME(Update)(&ctx, data, len);
 110         return (MDNAME(End)(&ctx, buf));
 111 }