QTfrontend/sha1.cpp
author unc0rr
Wed, 28 Dec 2005 22:18:11 +0000
changeset 32 78bff13b11c0
parent 21 dff476dcaaa3
child 33 d6363050cad0
permissions -rw-r--r--
With this patch the game doesn't crash when gaming by net
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/*
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 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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 * All rights reserved.
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 *
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 * Copyright (c) 2005 Andrey Korotaev <unC0Rr@gmail.com>
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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 project nor the names of its 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 PROJECT AND CONTRIBUTORS ``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 PROJECT OR CONTRIBUTORS 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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 * FIPS pub 180-1: Secure Hash Algorithm (SHA-1)
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 * based on: http://csrc.nist.gov/fips/fip180-1.txt
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 * implemented by Jun-ichiro itojun Itoh <itojun@itojun.org>
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 */
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#include "sha1.h"
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/* constant table */
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static quint32 _K[] = { 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6 };
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#define	K(t)	_K[(t) / 20]
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#define	F0(b, c, d)	(((b) & (c)) | ((~(b)) & (d)))
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#define	F1(b, c, d)	(((b) ^ (c)) ^ (d))
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#define	F2(b, c, d)	(((b) & (c)) | ((b) & (d)) | ((c) & (d)))
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#define	F3(b, c, d)	(((b) ^ (c)) ^ (d))
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#define	S(n, x)		(((x) << (n)) | ((x) >> (32 - n)))
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#define	H(n)	(ctxt->h.b32[(n)])
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#define	COUNT	(ctxt->count)
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#define	BCOUNT	(ctxt->c.b64[0] / 8)
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#define	W(n)	(ctxt->m.b32[(n)])
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#define	PUTBYTE(x)	{ \
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	ctxt->m.b8[(COUNT % 64)] = (x);		\
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	COUNT++;				\
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	COUNT %= 64;				\
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	ctxt->c.b64[0] += 8;			\
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	if (COUNT % 64 == 0)			\
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		sha1_step(ctxt);		\
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     }
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#define	PUTPAD(x)	{ \
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	ctxt->m.b8[(COUNT % 64)] = (x);		\
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	COUNT++;				\
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	COUNT %= 64;				\
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	if (COUNT % 64 == 0)			\
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		sha1_step(ctxt);		\
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     }
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static void sha1_step(struct sha1_ctxt *);
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static void
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sha1_step(struct sha1_ctxt *ctxt)
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{
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	quint32	a, b, c, d, e;
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	size_t t, s;
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	quint32	tmp;
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	a = H(0); b = H(1); c = H(2); d = H(3); e = H(4);
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	for (t = 0; t < 20; t++) {
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		s = t & 0x0f;
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		if (t >= 16) {
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			W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
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		}
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		tmp = S(5, a) + F0(b, c, d) + e + W(s) + K(t);
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		e = d; d = c; c = S(30, b); b = a; a = tmp;
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	}
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	for (t = 20; t < 40; t++) {
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		s = t & 0x0f;
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		W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
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		tmp = S(5, a) + F1(b, c, d) + e + W(s) + K(t);
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		e = d; d = c; c = S(30, b); b = a; a = tmp;
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	}
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	for (t = 40; t < 60; t++) {
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		s = t & 0x0f;
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		W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
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		tmp = S(5, a) + F2(b, c, d) + e + W(s) + K(t);
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		e = d; d = c; c = S(30, b); b = a; a = tmp;
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	}
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	for (t = 60; t < 80; t++) {
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		s = t & 0x0f;
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		W(s) = S(1, W((s+13) & 0x0f) ^ W((s+8) & 0x0f) ^ W((s+2) & 0x0f) ^ W(s));
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		tmp = S(5, a) + F3(b, c, d) + e + W(s) + K(t);
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		e = d; d = c; c = S(30, b); b = a; a = tmp;
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	}
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	H(0) = H(0) + a;
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	H(1) = H(1) + b;
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	H(2) = H(2) + c;
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	H(3) = H(3) + d;
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	H(4) = H(4) + e;
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	qMemSet(&ctxt->m.b8[0], 0, 64);
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}
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/*------------------------------------------------------------*/
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void sha1_init(struct sha1_ctxt *ctxt)
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{
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	qMemSet(ctxt, 0, sizeof(struct sha1_ctxt));
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	H(0) = 0x67452301;
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	H(1) = 0xefcdab89;
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	H(2) = 0x98badcfe;
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	H(3) = 0x10325476;
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	H(4) = 0xc3d2e1f0;
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}
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void sha1_pad(struct sha1_ctxt *ctxt)
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{
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	size_t padlen;		/*pad length in bytes*/
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	size_t padstart;
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	PUTPAD(0x80);
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	padstart = COUNT % 64;
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	padlen = 64 - padstart;
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	if (padlen < 8) {
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		qMemSet(&ctxt->m.b8[padstart], 0, padlen);
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		COUNT += padlen;
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		COUNT %= 64;
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		sha1_step(ctxt);
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		padstart = COUNT % 64;	/* should be 0 */
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		padlen = 64 - padstart;	/* should be 64 */
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	}
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	qMemSet(&ctxt->m.b8[padstart], 0, padlen - 8);
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	COUNT += (padlen - 8);
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	COUNT %= 64;
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	PUTPAD(ctxt->c.b8[0]); PUTPAD(ctxt->c.b8[1]);
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	PUTPAD(ctxt->c.b8[2]); PUTPAD(ctxt->c.b8[3]);
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	PUTPAD(ctxt->c.b8[4]); PUTPAD(ctxt->c.b8[5]);
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	PUTPAD(ctxt->c.b8[6]); PUTPAD(ctxt->c.b8[7]);
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}
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void sha1_loop(struct sha1_ctxt *ctxt, const quint8 *input, size_t len)
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{
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	size_t gaplen;
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	size_t gapstart;
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	size_t off;
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	size_t copysiz;
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	off = 0;
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	while (off < len) {
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		gapstart = COUNT % 64;
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		gaplen = 64 - gapstart;
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		copysiz = (gaplen < len - off) ? gaplen : len - off;
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		qMemCopy(&ctxt->m.b8[gapstart], &input[off], copysiz);
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		COUNT += copysiz;
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		COUNT %= 64;
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		ctxt->c.b64[0] += copysiz * 8;
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		if (COUNT % 64 == 0)
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			sha1_step(ctxt);
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		off += copysiz;
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	}
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}
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void sha1_result(struct sha1_ctxt *ctxt, caddr_t digest0)
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{
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	quint8 *digest;
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	digest = (quint8 *)digest0;
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	sha1_pad(ctxt);
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	qMemCopy(digest, &ctxt->h.b8[0], 20);
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}