/*      $NetBSD: mdXhl.c,v 1.13 2014/09/24 13:18:52 christos Exp $      */

/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <[email protected]> wrote this file.  As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* from FreeBSD Id: mdXhl.c,v 1.8 1996/10/25 06:48:12 bde Exp
*/

/*
* Modified April 29, 1997 by Jason R. Thorpe <[email protected]>
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#define CONCAT(x,y)     __CONCAT(x,y)
#define MDNAME(x)       CONCAT(MDALGORITHM,x)

#if !defined(_KERNEL) && defined(__weak_alias) && !defined(HAVE_NBTOOL_CONFIG_H)
#define WA(a,b) __weak_alias(a,b)
WA(MDNAME(End),CONCAT(_,MDNAME(End)))
WA(MDNAME(File),CONCAT(_,MDNAME(File)))
WA(MDNAME(Data),CONCAT(_,MDNAME(Data)))
#undef WA
#endif

#include "namespace.h"

#include <sys/types.h>

#include MDINCLUDE
#include <assert.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

char *
MDNAME(End)(MDNAME(_CTX) *ctx, char *buf)
{
       int i;
       unsigned char digest[16];
       static const char hex[]="0123456789abcdef";

       _DIAGASSERT(ctx != 0);

       if (buf == NULL)
               buf = malloc(33);
       if (buf == NULL)
               return (NULL);

       MDNAME(Final)(digest, ctx);

       for (i = 0; i < 16; i++) {
               buf[i+i] = hex[(u_int32_t)digest[i] >> 4];
               buf[i+i+1] = hex[digest[i] & 0x0f];
       }

       buf[i+i] = '\0';
       return (buf);
}

char *
MDNAME(File)(const char *filename, char *buf)
{
       unsigned char buffer[BUFSIZ];
       MDNAME(_CTX) ctx;
       int f, j;
       ssize_t i;

       _DIAGASSERT(filename != 0);
       /* buf may be NULL */

       MDNAME(Init)(&ctx);
       f = open(filename, O_RDONLY | O_CLOEXEC, 0666);
       if (f < 0)
               return NULL;

       while ((i = read(f, buffer, sizeof(buffer))) > 0)
               MDNAME(Update)(&ctx, buffer, (unsigned int)i);

       j = errno;
       close(f);
       errno = j;

       if (i < 0)
               return NULL;

       return (MDNAME(End)(&ctx, buf));
}

char *
MDNAME(Data)(const unsigned char *data, unsigned int len, char *buf)
{
       MDNAME(_CTX) ctx;

       _DIAGASSERT(data != 0);

       MDNAME(Init)(&ctx);
       MDNAME(Update)(&ctx, data, len);
       return (MDNAME(End)(&ctx, buf));
}