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/* $OpenBSD: helper.c,v 1.3 2004/04/29 02:43:06 millert 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
* ----------------------------------------------------------------------------
*/
#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$OpenBSD: helper.c,v 1.3 2004/04/29 02:43:06 millert Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <hashinc>
/* ARGSUSED */
char *
HASHEnd(HASH_CTX *ctx, char buf[HASH_DIGEST_STRING_LENGTH])
{
int i;
u_int8_t digest[HASH_DIGEST_LENGTH];
static const char hex[] = "0123456789abcdef";
if (buf == NULL && (buf = malloc(HASH_DIGEST_STRING_LENGTH)) == NULL)
return(NULL);
HASHFinal(digest, ctx);
for (i = 0; i < HASH_DIGEST_LENGTH; i++) {
buf[i + i] = hex[digest[i] >> 4];
buf[i + i + 1] = hex[digest[i] & 0x0f];
}
buf[i + i] = '\0';
memset(digest, 0, sizeof(digest));
return (buf);
}
char *
HASHFile(char *filename, char buf[HASH_DIGEST_STRING_LENGTH])
{
u_char buffer[BUFSIZ];
HASH_CTX ctx;
int fd, num, save_errno;
HASHInit(&ctx);
if ((fd = open(filename, O_RDONLY)) < 0)
return(NULL);
while ((num = read(fd, buffer, sizeof(buffer))) > 0)
HASHUpdate(&ctx, buffer, num);
save_errno = errno;
close(fd);
errno = save_errno;
return (num < 0 ? NULL : HASHEnd(&ctx, buf));
}
char *
HASHData(const u_char *data, size_t len, char buf[HASH_DIGEST_STRING_LENGTH])
{
HASH_CTX ctx;
HASHInit(&ctx);
HASHUpdate(&ctx, data, len);
return (HASHEnd(&ctx, buf));
}
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