3cefcc036a
Changes since previous version: + add Taylor Campbell's implementation of SHA3 digests. This includes code to calculate 224, 256, 384 and 512bit length digests. + change the license on all the code I wrote to be 2-clause BSD + modify license years for things that have been changed + add self-test command line option to digest(1) via the -t switch pkgsrc changes + derive version number for the package automatically from the source code
316 lines
7.6 KiB
C
316 lines
7.6 KiB
C
/* $NetBSD: sha3hl.c,v 1.1 2016/03/03 22:11:07 agc Exp $ */
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/*
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* sha3hl.c
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* This code is derived from sha2hl.c, hence the following licence
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* reproduction.
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*
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* This code is not a verbatim copy, since some routines have been added,
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* and some bugs have been fixed.
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*
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* Version 1.0.0beta1
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*
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* Written by Aaron D. Gifford <me@aarongifford.com>
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*
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* Copyright 2000 Aaron D. Gifford. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) AND CONTRIBUTOR(S) ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) OR CONTRIBUTOR(S) BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include "sha3.h"
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifndef _DIAGASSERT
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#define _DIAGASSERT(cond) assert(cond)
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#endif
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#ifndef MEMSET_BZERO
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#define MEMSET_BZERO(p,l) memset((p), 0, (l))
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#endif
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/*
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* Constant used by SHA3_224/256/384/512_End() functions for converting the
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* digest to a readable hexadecimal character string:
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*/
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static const char sha3_hex_digits[] = "0123456789abcdef";
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char *
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SHA3_224_File(char *filename, char *buf)
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{
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unsigned char buffer[BUFSIZ * 20];
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SHA3_224_CTX ctx;
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int fd, num, oerrno;
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_DIAGASSERT(filename != NULL);
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/* XXX: buf may be NULL ? */
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SHA3_224_Init(&ctx);
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if ((fd = open(filename, O_RDONLY)) < 0)
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return (0);
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while ((num = read(fd, buffer, sizeof(buffer))) > 0)
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SHA3_224_Update(&ctx, buffer, (size_t) num);
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oerrno = errno;
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close(fd);
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errno = oerrno;
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return (num < 0 ? 0 : SHA3_224_End(&ctx, buf));
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}
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char *
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SHA3_224_End(SHA3_224_CTX *ctx, char buffer[])
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{
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unsigned char digest[SHA3_224_DIGEST_LENGTH], *d = digest;
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unsigned char *ret;
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int i;
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/* Sanity check: */
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assert(ctx != NULL);
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if ((ret = buffer) != NULL) {
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SHA3_224_Final(digest, ctx);
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for (i = 0; i < SHA3_224_DIGEST_LENGTH; i++) {
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*buffer++ = sha3_hex_digits[(*d & 0xf0) >> 4];
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*buffer++ = sha3_hex_digits[*d & 0x0f];
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d++;
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}
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*buffer = (char) 0;
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} else {
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(void) MEMSET_BZERO(ctx, sizeof(SHA3_224_CTX));
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}
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(void) MEMSET_BZERO(digest, SHA3_224_DIGEST_LENGTH);
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return ret;
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}
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char *
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SHA3_224_Data(const uint8_t * data, size_t len, unsigned char *digest)
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{
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SHA3_224_CTX ctx;
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SHA3_224_Init(&ctx);
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SHA3_224_Update(&ctx, data, len);
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return SHA3_224_End(&ctx, digest);
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}
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char *
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SHA3_256_File(char *filename, char *buf)
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{
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unsigned char buffer[BUFSIZ * 20];
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SHA3_256_CTX ctx;
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int fd, num, oerrno;
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_DIAGASSERT(filename != NULL);
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/* XXX: buf may be NULL ? */
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SHA3_256_Init(&ctx);
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if ((fd = open(filename, O_RDONLY)) < 0)
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return (0);
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while ((num = read(fd, buffer, sizeof(buffer))) > 0)
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SHA3_256_Update(&ctx, buffer, (size_t) num);
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oerrno = errno;
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close(fd);
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errno = oerrno;
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return (num < 0 ? 0 : SHA3_256_End(&ctx, buf));
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}
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char *
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SHA3_256_End(SHA3_256_CTX *ctx, char buffer[])
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{
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unsigned char digest[SHA3_256_DIGEST_LENGTH], *d = digest;
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unsigned char *ret;
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int i;
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/* Sanity check: */
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assert(ctx != NULL);
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if ((ret = buffer) != NULL) {
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SHA3_256_Final(digest, ctx);
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for (i = 0; i < SHA3_256_DIGEST_LENGTH; i++) {
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*buffer++ = sha3_hex_digits[(*d & 0xf0) >> 4];
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*buffer++ = sha3_hex_digits[*d & 0x0f];
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d++;
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}
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*buffer = (char) 0;
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} else {
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(void) MEMSET_BZERO(ctx, sizeof(SHA3_256_CTX));
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}
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(void) MEMSET_BZERO(digest, SHA3_256_DIGEST_LENGTH);
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return ret;
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}
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char *
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SHA3_256_Data(const uint8_t * data, size_t len, unsigned char *digest)
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{
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SHA3_256_CTX ctx;
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SHA3_256_Init(&ctx);
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SHA3_256_Update(&ctx, data, len);
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return SHA3_256_End(&ctx, digest);
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}
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char *
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SHA3_384_File(char *filename, char *buf)
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{
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unsigned char buffer[BUFSIZ * 20];
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SHA3_384_CTX ctx;
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int fd, num, oerrno;
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_DIAGASSERT(filename != NULL);
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/* XXX: buf may be NULL ? */
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SHA3_384_Init(&ctx);
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if ((fd = open(filename, O_RDONLY)) < 0)
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return (0);
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while ((num = read(fd, buffer, sizeof(buffer))) > 0)
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SHA3_384_Update(&ctx, buffer, (size_t) num);
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oerrno = errno;
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close(fd);
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errno = oerrno;
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return (num < 0 ? 0 : SHA3_384_End(&ctx, buf));
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}
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char *
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SHA3_384_End(SHA3_384_CTX *ctx, char buffer[])
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{
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unsigned char digest[SHA3_384_DIGEST_LENGTH], *d = digest;
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unsigned char *ret;
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int i;
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/* Sanity check: */
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assert(ctx != NULL);
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if ((ret = buffer) != NULL) {
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SHA3_384_Final(digest, ctx);
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for (i = 0; i < SHA3_384_DIGEST_LENGTH; i++) {
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*buffer++ = sha3_hex_digits[(*d & 0xf0) >> 4];
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*buffer++ = sha3_hex_digits[*d & 0x0f];
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d++;
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}
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*buffer = (char) 0;
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} else {
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(void) MEMSET_BZERO(ctx, sizeof(SHA3_384_CTX));
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}
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(void) MEMSET_BZERO(digest, SHA3_384_DIGEST_LENGTH);
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return ret;
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}
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char *
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SHA3_384_Data(const uint8_t * data, size_t len, unsigned char *digest)
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{
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SHA3_384_CTX ctx;
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SHA3_384_Init(&ctx);
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SHA3_384_Update(&ctx, data, len);
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return SHA3_384_End(&ctx, digest);
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}
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char *
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SHA3_512_File(char *filename, char *buf)
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{
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unsigned char buffer[BUFSIZ * 20];
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SHA3_512_CTX ctx;
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int fd, num, oerrno;
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_DIAGASSERT(filename != NULL);
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/* XXX: buf may be NULL ? */
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SHA3_512_Init(&ctx);
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if ((fd = open(filename, O_RDONLY)) < 0)
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return (0);
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while ((num = read(fd, buffer, sizeof(buffer))) > 0)
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SHA3_512_Update(&ctx, buffer, (size_t) num);
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oerrno = errno;
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close(fd);
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errno = oerrno;
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return (num < 0 ? 0 : SHA3_512_End(&ctx, buf));
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}
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char *
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SHA3_512_End(SHA3_512_CTX *ctx, char buffer[])
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{
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unsigned char digest[SHA3_512_DIGEST_LENGTH], *d = digest;
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unsigned char *ret;
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int i;
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/* Sanity check: */
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assert(ctx != NULL);
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if ((ret = buffer) != NULL) {
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SHA3_512_Final(digest, ctx);
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for (i = 0; i < SHA3_512_DIGEST_LENGTH; i++) {
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*buffer++ = sha3_hex_digits[(*d & 0xf0) >> 4];
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*buffer++ = sha3_hex_digits[*d & 0x0f];
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d++;
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}
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*buffer = (char) 0;
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} else {
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(void) MEMSET_BZERO(ctx, sizeof(SHA3_512_CTX));
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}
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(void) MEMSET_BZERO(digest, SHA3_512_DIGEST_LENGTH);
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return ret;
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}
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char *
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SHA3_512_Data(const uint8_t * data, size_t len, unsigned char *digest)
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{
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SHA3_512_CTX ctx;
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SHA3_512_Init(&ctx);
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SHA3_512_Update(&ctx, data, len);
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return SHA3_512_End(&ctx, digest);
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}
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