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dcfldd/sha1.c

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/*-
* Copyright (c) 2001-2003 Allan Saddi <allan@saddi.com>
* 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.
*
* THIS SOFTWARE IS PROVIDED BY ALLAN SADDI AND HIS CONTRIBUTORS ``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 ALLAN SADDI OR HIS CONTRIBUTORS 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.
*
* $Id: sha1.c,v 1.3 2005/05/13 18:52:06 harbourn Exp $
*/
/*
* Define WORDS_BIGENDIAN if compiling on a big-endian architecture.
*
* Define SHA1_TEST to test the implementation using the NIST's
* sample messages. The output should be:
*
* a9993e36 4706816a ba3e2571 7850c26c 9cd0d89d
* 84983e44 1c3bd26e baae4aa1 f95129e5 e54670f1
* 34aa973c d4c4daa4 f61eeb2b dbad2731 6534016f
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#if HAVE_INTTYPES_H
# include <inttypes.h>
#else
# if HAVE_STDINT_H
# include <stdint.h>
# endif
#endif
#include <string.h>
#include "sha1.h"
#ifndef lint
static const char rcsid[] =
"$Id: sha1.c,v 1.3 2005/05/13 18:52:06 harbourn Exp $";
#endif /* !lint */
#define ROTL(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
#define ROTR(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
#define F_0_19(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
#define F_20_39(x, y, z) ((x) ^ (y) ^ (z))
#define F_40_59(x, y, z) (((x) & ((y) | (z))) | ((y) & (z)))
#define F_60_79(x, y, z) ((x) ^ (y) ^ (z))
#define DO_ROUND(F, K) { \
temp = ROTL(a, 5) + F(b, c, d) + e + *(W++) + K; \
e = d; \
d = c; \
c = ROTL(b, 30); \
b = a; \
a = temp; \
}
#define K_0_19 0x5a827999L
#define K_20_39 0x6ed9eba1L
#define K_40_59 0x8f1bbcdcL
#define K_60_79 0xca62c1d6L
#ifndef RUNTIME_ENDIAN
#ifdef WORDS_BIGENDIAN
#define BYTESWAP(x) (x)
#define BYTESWAP64(x) (x)
#else /* WORDS_BIGENDIAN */
#define BYTESWAP(x) ((ROTR((x), 8) & 0xff00ff00L) | \
(ROTL((x), 8) & 0x00ff00ffL))
#define BYTESWAP64(x) _byteswap64(x)
static inline uint64_t _byteswap64(uint64_t x)
{
uint32_t a = x >> 32;
uint32_t b = (uint32_t) x;
return ((uint64_t) BYTESWAP(b) << 32) | (uint64_t) BYTESWAP(a);
}
#endif /* WORDS_BIGENDIAN */
#else /* !RUNTIME_ENDIAN */
#define BYTESWAP(x) _byteswap(sc->littleEndian, x)
#define BYTESWAP64(x) _byteswap64(sc->littleEndian, x)
#define _BYTESWAP(x) ((ROTR((x), 8) & 0xff00ff00L) | \
(ROTL((x), 8) & 0x00ff00ffL))
#define _BYTESWAP64(x) __byteswap64(x)
static inline uint64_t __byteswap64(uint64_t x)
{
uint32_t a = x >> 32;
uint32_t b = (uint32_t) x;
return ((uint64_t) _BYTESWAP(b) << 32) | (uint64_t) _BYTESWAP(a);
}
static inline uint32_t _byteswap(int littleEndian, uint32_t x)
{
if (!littleEndian)
return x;
else
return _BYTESWAP(x);
}
static inline uint64_t _byteswap64(int littleEndian, uint64_t x)
{
if (!littleEndian)
return x;
else
return _BYTESWAP64(x);
}
static inline void setEndian(int *littleEndianp)
{
union {
uint32_t w;
uint8_t b[4];
} endian;
endian.w = 1L;
*littleEndianp = endian.b[0] != 0;
}
#endif /* !RUNTIME_ENDIAN */
static const uint8_t padding[64] = {
0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
void
SHA1Init (SHA1Context *sc)
{
#ifdef RUNTIME_ENDIAN
setEndian (&sc->littleEndian);
#endif /* RUNTIME_ENDIAN */
sc->totalLength = 0LL;
sc->hash[0] = 0x67452301L;
sc->hash[1] = 0xefcdab89L;
sc->hash[2] = 0x98badcfeL;
sc->hash[3] = 0x10325476L;
sc->hash[4] = 0xc3d2e1f0L;
sc->bufferLength = 0L;
}
static void
burnStack (int size)
{
char buf[128];
memset (buf, 0, sizeof (buf));
size -= sizeof (buf);
if (size > 0)
burnStack (size);
}
static void
SHA1Guts (SHA1Context *sc, const uint32_t *cbuf)
{
uint32_t buf[80];
uint32_t *W, *W3, *W8, *W14, *W16;
uint32_t a, b, c, d, e, temp;
int i;
W = buf;
for (i = 15; i >= 0; i--) {
*(W++) = BYTESWAP(*cbuf);
cbuf++;
}
W16 = &buf[0];
W14 = &buf[2];
W8 = &buf[8];
W3 = &buf[13];
for (i = 63; i >= 0; i--) {
*W = *(W3++) ^ *(W8++) ^ *(W14++) ^ *(W16++);
*W = ROTL(*W, 1);
W++;
}
a = sc->hash[0];
b = sc->hash[1];
c = sc->hash[2];
d = sc->hash[3];
e = sc->hash[4];
W = buf;
#ifndef SHA1_UNROLL
#define SHA1_UNROLL 20
#endif /* !SHA1_UNROLL */
#if SHA1_UNROLL == 1
for (i = 19; i >= 0; i--)
DO_ROUND(F_0_19, K_0_19);
for (i = 19; i >= 0; i--)
DO_ROUND(F_20_39, K_20_39);
for (i = 19; i >= 0; i--)
DO_ROUND(F_40_59, K_40_59);
for (i = 19; i >= 0; i--)
DO_ROUND(F_60_79, K_60_79);
#elif SHA1_UNROLL == 2
for (i = 9; i >= 0; i--) {
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
}
for (i = 9; i >= 0; i--) {
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
}
for (i = 9; i >= 0; i--) {
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
}
for (i = 9; i >= 0; i--) {
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
}
#elif SHA1_UNROLL == 4
for (i = 4; i >= 0; i--) {
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
}
for (i = 4; i >= 0; i--) {
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
}
for (i = 4; i >= 0; i--) {
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
}
for (i = 4; i >= 0; i--) {
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
}
#elif SHA1_UNROLL == 5
for (i = 3; i >= 0; i--) {
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
}
for (i = 3; i >= 0; i--) {
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
}
for (i = 3; i >= 0; i--) {
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
}
for (i = 3; i >= 0; i--) {
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
}
#elif SHA1_UNROLL == 10
for (i = 1; i >= 0; i--) {
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
}
for (i = 1; i >= 0; i--) {
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
}
for (i = 1; i >= 0; i--) {
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
}
for (i = 1; i >= 0; i--) {
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
}
#elif SHA1_UNROLL == 20
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_0_19, K_0_19);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_20_39, K_20_39);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_40_59, K_40_59);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
DO_ROUND(F_60_79, K_60_79);
#else /* SHA1_UNROLL */
#error SHA1_UNROLL must be 1, 2, 4, 5, 10 or 20!
#endif
sc->hash[0] += a;
sc->hash[1] += b;
sc->hash[2] += c;
sc->hash[3] += d;
sc->hash[4] += e;
}
void
SHA1Update (SHA1Context *sc, const void *vdata, uint32_t len)
{
const uint8_t *data = vdata;
uint32_t bufferBytesLeft;
uint32_t bytesToCopy;
int needBurn = 0;
#ifdef SHA1_FAST_COPY
if (sc->bufferLength) {
bufferBytesLeft = 64L - sc->bufferLength;
bytesToCopy = bufferBytesLeft;
if (bytesToCopy > len)
bytesToCopy = len;
memcpy (&sc->buffer.bytes[sc->bufferLength], data, bytesToCopy);
sc->totalLength += bytesToCopy * 8L;
sc->bufferLength += bytesToCopy;
data += bytesToCopy;
len -= bytesToCopy;
if (sc->bufferLength == 64L) {
SHA1Guts (sc, sc->buffer.words);
needBurn = 1;
sc->bufferLength = 0L;
}
}
while (len > 63) {
sc->totalLength += 512L;
SHA1Guts (sc, data);
needBurn = 1;
data += 64L;
len -= 64L;
}
if (len) {
memcpy (&sc->buffer.bytes[sc->bufferLength], data, len);
sc->totalLength += len * 8L;
sc->bufferLength += len;
}
#else /* SHA1_FAST_COPY */
while (len) {
bufferBytesLeft = 64L - sc->bufferLength;
bytesToCopy = bufferBytesLeft;
if (bytesToCopy > len)
bytesToCopy = len;
memcpy (&sc->buffer.bytes[sc->bufferLength], data, bytesToCopy);
sc->totalLength += bytesToCopy * 8L;
sc->bufferLength += bytesToCopy;
data += bytesToCopy;
len -= bytesToCopy;
if (sc->bufferLength == 64L) {
SHA1Guts (sc, sc->buffer.words);
needBurn = 1;
sc->bufferLength = 0L;
}
}
#endif /* SHA1_FAST_COPY */
if (needBurn)
burnStack (sizeof (uint32_t[86]) + sizeof (uint32_t *[5]) + sizeof (int));
}
void
SHA1Final (SHA1Context *sc, uint8_t hash[SHA1_HASH_SIZE])
{
uint32_t bytesToPad;
uint64_t lengthPad;
int i;
bytesToPad = 120L - sc->bufferLength;
if (bytesToPad > 64L)
bytesToPad -= 64L;
lengthPad = BYTESWAP64(sc->totalLength);
SHA1Update (sc, padding, bytesToPad);
SHA1Update (sc, &lengthPad, 8L);
if (hash) {
for (i = 0; i < SHA1_HASH_WORDS; i++) {
#ifdef SHA1_FAST_COPY
*((uint32_t *) hash) = BYTESWAP(sc->hash[i]);
#else /* SHA1_FAST_COPY */
hash[0] = (uint8_t) (sc->hash[i] >> 24);
hash[1] = (uint8_t) (sc->hash[i] >> 16);
hash[2] = (uint8_t) (sc->hash[i] >> 8);
hash[3] = (uint8_t) sc->hash[i];
#endif /* SHA1_FAST_COPY */
hash += 4;
}
}
}
void
SHA1End (SHA1Context *sc, char *hashstrbuf)
{
static const char *sha1_hex_digits = "0123456789abcdef";
uint8_t digest[SHA1_HASH_SIZE], *d = digest;
int i;
/* Sanity check: */
if (sc == NULL)
return;
if (hashstrbuf == NULL)
return;
SHA1Final(sc, digest);
for (i = 0; i < SHA1_HASH_SIZE; i++) {
*hashstrbuf++ = sha1_hex_digits[(*d & 0xf0) >> 4];
*hashstrbuf++ = sha1_hex_digits[(*d & 0x0f)];
d++;
}
*hashstrbuf = '\0';
}
#ifdef SHA1_TEST
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int
main (int argc, char *argv[])
{
SHA1Context foo;
uint8_t hash[SHA1_HASH_SIZE];
char buf[1000];
int i;
SHA1Init (&foo);
SHA1Update (&foo, "abc", 3);
SHA1Final (&foo, hash);
for (i = 0; i < SHA1_HASH_SIZE;) {
printf ("%02x", hash[i++]);
if (!(i % 4))
printf (" ");
}
printf ("\n");
SHA1Init (&foo);
SHA1Update (&foo,
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
56);
SHA1Final (&foo, hash);
for (i = 0; i < SHA1_HASH_SIZE;) {
printf ("%02x", hash[i++]);
if (!(i % 4))
printf (" ");
}
printf ("\n");
SHA1Init (&foo);
memset (buf, 'a', sizeof (buf));
for (i = 0; i < 1000; i++)
SHA1Update (&foo, buf, sizeof (buf));
SHA1Final (&foo, hash);
for (i = 0; i < SHA1_HASH_SIZE;) {
printf ("%02x", hash[i++]);
if (!(i % 4))
printf (" ");
}
printf ("\n");
exit (0);
}
#endif /* SHA1_TEST */
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