lib/libc/md/mdXhl.c

   1 /*      $NetBSD: mdXhl.c,v 1.13 2014/09/24 13:18:52 christos 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 char *
  46 MDNAME(End)(MDNAME(_CTX) *ctx, char *buf)
  47 {
  48         int i;
  49         unsigned char digest[16];
  50         static const char hex[]="0123456789abcdef";
  51
  52         _DIAGASSERT(ctx != 0);
  53
  54         if (buf == NULL)
  55                 buf = malloc(33);
  56         if (buf == NULL)
  57                 return (NULL);
  58
  59         MDNAME(Final)(digest, ctx);
  60
  61         for (i = 0; i < 16; i++) {
  62                 buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
  63                 buf[i+i+1] = hex[digest[i] & 0x0f];
  64         }
  65
  66         buf[i+i] = '\0';
  67         return (buf);
  68 }
  69
  70 char *
  71 MDNAME(File)(const char *filename, char *buf)
  72 {
  73         unsigned char buffer[BUFSIZ];
  74         MDNAME(_CTX) ctx;
  75         int f, j;
  76         ssize_t i;
  77
  78         _DIAGASSERT(filename != 0);
  79         /* buf may be NULL */
  80
  81         MDNAME(Init)(&ctx);
  82         f = open(filename, O_RDONLY | O_CLOEXEC, 0666);
  83         if (f < 0)
  84                 return NULL;
  85
  86         while ((i = read(f, buffer, sizeof(buffer))) > 0)
  87                 MDNAME(Update)(&ctx, buffer, (unsigned int)i);
  88
  89         j = errno;
  90         close(f);
  91         errno = j;
  92
  93         if (i < 0)
  94                 return NULL;
  95
  96         return (MDNAME(End)(&ctx, buf));
  97 }
  98
  99 char *
 100 MDNAME(Data)(const unsigned char *data, unsigned int len, char *buf)
 101 {
 102         MDNAME(_CTX) ctx;
 103
 104         _DIAGASSERT(data != 0);
 105
 106         MDNAME(Init)(&ctx);
 107         MDNAME(Update)(&ctx, data, len);
 108         return (MDNAME(End)(&ctx, buf));
 109 }