144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
/* $NetBSD: hashhl.c,v 1.1 2005/09/28 16:31:45 christos Exp $ */
|
|
|
|
/*
|
|
* ----------------------------------------------------------------------------
|
|
* "THE BEER-WARE LICENSE" (Revision 42):
|
|
* <phk@login.dkuug.dk> 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
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* Modified September 24, 2005 by Elad Efrat <elad@NetBSD.org>
|
|
* Modified April 29, 1997 by Jason R. Thorpe <thorpej@NetBSD.org>
|
|
*/
|
|
|
|
#ifdef HASH_ALGORITHM
|
|
|
|
/*
|
|
* Do all the name mangling before we include "namespace.h"
|
|
*/
|
|
#define CONCAT(x,y) __CONCAT(x,y)
|
|
|
|
#ifndef HASH_FNPREFIX
|
|
#define HASH_FNPREFIX HASH_ALGORITHM
|
|
#endif /* !HASH_FNPREFIX */
|
|
|
|
#define FNPREFIX(x) CONCAT(HASH_FNPREFIX,x)
|
|
#define HASH_CTX CONCAT(HASH_ALGORITHM,_CTX)
|
|
#define HASH_LEN CONCAT(HASH_ALGORITHM,_DIGEST_LENGTH)
|
|
#define HASH_STRLEN CONCAT(HASH_ALGORITHM,_DIGEST_STRING_LENGTH)
|
|
|
|
#if !defined(_KERNEL) && defined(__weak_alias)
|
|
#define WA(a,b) __weak_alias(a,b)
|
|
WA(FNPREFIX(End),CONCAT(_,FNPREFIX(End)))
|
|
WA(FNPREFIX(FileChunk),CONCAT(_,FNPREFIX(FileChunk)))
|
|
WA(FNPREFIX(File),CONCAT(_,FNPREFIX(File)))
|
|
WA(FNPREFIX(Data),CONCAT(_,FNPREFIX(Data)))
|
|
#undef WA
|
|
#endif
|
|
|
|
#include "namespace.h"
|
|
#include HASH_INCLUDE
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#if HAVE_NBTOOL_CONFIG_H
|
|
#include "nbtool_config.h"
|
|
#endif
|
|
|
|
#ifndef MIN
|
|
#define MIN(x,y) ((x)<(y)?(x):(y))
|
|
#endif /* !MIN */
|
|
|
|
|
|
char *
|
|
FNPREFIX(End)(HASH_CTX *ctx, char *buf)
|
|
{
|
|
int i;
|
|
unsigned char digest[HASH_LEN];
|
|
static const char hex[]="0123456789abcdef";
|
|
|
|
_DIAGASSERT(ctx != 0);
|
|
|
|
if (buf == NULL)
|
|
buf = malloc((size_t)HASH_STRLEN);
|
|
if (buf == NULL)
|
|
return (NULL);
|
|
|
|
FNPREFIX(Final)(digest, ctx);
|
|
|
|
for (i = 0; i < HASH_LEN; 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 *
|
|
FNPREFIX(FileChunk)(const char *filename, char *buf, off_t off, off_t len)
|
|
{
|
|
struct stat sb;
|
|
u_char buffer[BUFSIZ];
|
|
HASH_CTX ctx;
|
|
int fd, save_errno;
|
|
ssize_t nr;
|
|
|
|
FNPREFIX(Init)(&ctx);
|
|
|
|
if ((fd = open(filename, O_RDONLY)) < 0)
|
|
return (NULL);
|
|
if (len == 0) {
|
|
if (fstat(fd, &sb) == -1) {
|
|
close(fd);
|
|
return (NULL);
|
|
}
|
|
len = sb.st_size;
|
|
}
|
|
if (off > 0 && lseek(fd, off, SEEK_SET) < 0)
|
|
return (NULL);
|
|
|
|
while ((nr = read(fd, buffer, (size_t) MIN(sizeof(buffer), len)))
|
|
> 0) {
|
|
FNPREFIX(Update)(&ctx, buffer, (unsigned int)nr);
|
|
if (len > 0 && (len -= nr) == 0)
|
|
break;
|
|
}
|
|
|
|
save_errno = errno;
|
|
close(fd);
|
|
errno = save_errno;
|
|
return (nr < 0 ? NULL : FNPREFIX(End)(&ctx, buf));
|
|
}
|
|
|
|
char *
|
|
FNPREFIX(File)(const char *filename, char *buf)
|
|
{
|
|
return (FNPREFIX(FileChunk)(filename, buf, (off_t)0, (off_t)0));
|
|
}
|
|
|
|
char *
|
|
FNPREFIX(Data)(const unsigned char *data, size_t len, char *buf)
|
|
{
|
|
HASH_CTX ctx;
|
|
|
|
_DIAGASSERT(data != 0);
|
|
|
|
FNPREFIX(Init)(&ctx);
|
|
FNPREFIX(Update)(&ctx, data, (unsigned int)len);
|
|
return (FNPREFIX(End)(&ctx, buf));
|
|
}
|
|
|
|
#endif /* HASH_ALGORITHM */
|