/* $NetBSD: sha2hl.c,v 1.3 2002/12/21 04:06:15 schmonz Exp $ */
/*
* sha2hl.c
* This code includes some functions taken from sha2.c, hence the
* following licence reproduction.
*
* This code is not a verbatim copy, since some routines have been added,
* and some bugs have been fixed.
*
* Version 1.0.0beta1
*
* Written by Aaron D. Gifford <me@aarongifford.com>
*
* Copyright 2000 Aaron D. Gifford. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <digest-types.h>
#ifndef lint
__RCSID("$NetBSD: sha2hl.c,v 1.3 2002/12/21 04:06:15 schmonz Exp $");
#endif /* not lint */
/* #include "namespace.h" */
#include <assert.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <sha2.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#ifndef _DIAGASSERT
#define _DIAGASSERT(cond) assert(cond)
#endif
#ifndef MEMSET_BZERO
#define MEMSET_BZERO(p,l) memset((p), 0, (l))
#endif
/*
* Constant used by SHA256/384/512_End() functions for converting the
* digest to a readable hexadecimal character string:
*/
static const char sha2_hex_digits[] = "0123456789abcdef";
char *
SHA256_File(char *filename, char *buf)
{
u_char buffer[BUFSIZ * 20];
SHA256_CTX ctx;
int fd, num, oerrno;
_DIAGASSERT(filename != NULL);
/* XXX: buf may be NULL ? */
SHA256_Init(&ctx);
if ((fd = open(filename, O_RDONLY)) < 0)
return (0);
while ((num = read(fd, buffer, sizeof(buffer))) > 0)
SHA256_Update(&ctx, buffer, (size_t) num);
oerrno = errno;
close(fd);
errno = oerrno;
return (num < 0 ? 0 : SHA256_End(&ctx, buf));
}
char *
SHA256_End(SHA256_CTX *ctx, u_char *buffer)
{
u_char digest[SHA256_DIGEST_LENGTH], *d = digest;
u_char *ret;
int i;
/* Sanity check: */
assert(ctx != NULL);
if ((ret = buffer) != NULL) {
SHA256_Final(digest, ctx);
for (i = 0; i < SHA256_DIGEST_LENGTH; i++) {
*buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
*buffer++ = sha2_hex_digits[*d & 0x0f];
d++;
}
*buffer = (char) 0;
} else {
(void) MEMSET_BZERO(ctx, sizeof(SHA256_CTX));
}
(void) MEMSET_BZERO(digest, SHA256_DIGEST_LENGTH);
return ret;
}
char *
SHA256_Data(const u_char * data, size_t len, u_char *digest)
{
SHA256_CTX ctx;
SHA256_Init(&ctx);
SHA256_Update(&ctx, data, len);
return SHA256_End(&ctx, digest);
}
char *
SHA384_File(char *filename, char *buf)
{
SHA384_CTX ctx;
u_char buffer[BUFSIZ * 20];
int fd, num, oerrno;
_DIAGASSERT(filename != NULL);
/* XXX: buf may be NULL ? */
SHA384_Init(&ctx);
if ((fd = open(filename, O_RDONLY)) < 0)
return (0);
while ((num = read(fd, buffer, sizeof(buffer))) > 0)
SHA384_Update(&ctx, buffer, (size_t) num);
oerrno = errno;
close(fd);
errno = oerrno;
return (num < 0 ? 0 : SHA384_End(&ctx, buf));
}
char *
SHA384_End(SHA384_CTX * ctx, char buffer[])
{
u_char digest[SHA384_DIGEST_LENGTH], *d = digest;
u_char *ret;
int i;
/* Sanity check: */
assert(ctx != NULL);
if ((ret = buffer) != NULL) {
SHA384_Final(digest, ctx);
for (i = 0; i < SHA384_DIGEST_LENGTH; i++) {
*buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
*buffer++ = sha2_hex_digits[*d & 0x0f];
d++;
}
*buffer = (char) 0;
} else {
(void) MEMSET_BZERO(ctx, sizeof(SHA384_CTX));
}
(void) MEMSET_BZERO(digest, SHA384_DIGEST_LENGTH);
return ret;
}
char *
SHA384_Data(const u_char * data, size_t len, char digest[SHA384_DIGEST_STRING_LENGTH])
{
SHA384_CTX ctx;
SHA384_Init(&ctx);
SHA384_Update(&ctx, data, len);
return SHA384_End(&ctx, digest);
}
char *
SHA512_File(char *filename, char *buf)
{
SHA512_CTX ctx;
u_char buffer[BUFSIZ * 20];
int fd, num, oerrno;
_DIAGASSERT(filename != NULL);
/* XXX: buf may be NULL ? */
SHA512_Init(&ctx);
if ((fd = open(filename, O_RDONLY)) < 0)
return (0);
while ((num = read(fd, buffer, sizeof(buffer))) > 0)
SHA512_Update(&ctx, buffer, (size_t) num);
oerrno = errno;
close(fd);
errno = oerrno;
return (num < 0 ? 0 : SHA512_End(&ctx, buf));
}
char *
SHA512_End(SHA512_CTX * ctx, char buffer[])
{
u_char digest[SHA512_DIGEST_LENGTH], *d = digest;
u_char *ret;
int i;
/* Sanity check: */
assert(ctx != NULL);
if ((ret = buffer) != NULL) {
SHA512_Final(digest, ctx);
for (i = 0; i < SHA512_DIGEST_LENGTH; i++) {
*buffer++ = sha2_hex_digits[(*d & 0xf0) >> 4];
*buffer++ = sha2_hex_digits[*d & 0x0f];
d++;
}
*buffer = (char) 0;
} else {
(void) MEMSET_BZERO(ctx, sizeof(SHA512_CTX));
}
(void) MEMSET_BZERO(digest, SHA512_DIGEST_LENGTH);
return ret;
}
char *
SHA512_Data(const u_char * data, size_t len, char *digest)
{
SHA512_CTX ctx;
SHA512_Init(&ctx);
SHA512_Update(&ctx, data, len);
return SHA512_End(&ctx, digest);
}
