mirror of https://github.com/hak5/openwrt.git
240 lines
9.2 KiB
C
240 lines
9.2 KiB
C
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/*******************************************************************************
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Copyright (C) Marvell International Ltd. and its affiliates
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This software file (the "File") is owned and distributed by Marvell
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International Ltd. and/or its affiliates ("Marvell") under the following
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alternative licensing terms. Once you have made an election to distribute the
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File under one of the following license alternatives, please (i) delete this
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introductory statement regarding license alternatives, (ii) delete the two
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license alternatives that you have not elected to use and (iii) preserve the
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Marvell copyright notice above.
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********************************************************************************
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Marvell Commercial License Option
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If you received this File from Marvell and you have entered into a commercial
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license agreement (a "Commercial License") with Marvell, the File is licensed
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to you under the terms of the applicable Commercial License.
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********************************************************************************
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Marvell GPL License Option
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If you received this File from Marvell, you may opt to use, redistribute and/or
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modify this File in accordance with the terms and conditions of the General
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Public License Version 2, June 1991 (the "GPL License"), a copy of which is
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available along with the File in the license.txt file or by writing to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
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on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
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THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
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WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
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DISCLAIMED. The GPL License provides additional details about this warranty
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disclaimer.
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********************************************************************************
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Marvell BSD License Option
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If you received this File from Marvell, you may opt to use, redistribute and/or
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modify this File under the following licensing terms.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* 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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* Neither the name of Marvell nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
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#include "mvOs.h"
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#include "mvSHA1.h"
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#define SHA1HANDSOFF
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typedef union
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{
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MV_U8 c[64];
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MV_U32 l[16];
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} CHAR64LONG16;
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static void mvSHA1Transform(MV_U32 state[5], const MV_U8 *buffer);
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#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
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#ifdef MV_CPU_LE
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#define blk0(i) (block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | \
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(rol(block->l[i], 8) & 0x00FF00FF))
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#else
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#define blk0(i) block->l[i]
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#endif
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#define blk(i) (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ \
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block->l[(i + 8) & 15] ^ block->l[(i + 2) & 15] ^ block->l[i & 15], 1))
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/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
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#define R0(v,w,x,y,z,i) \
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z += ((w & (x ^ y)) ^ y) + blk0(i) + 0x5A827999 + rol(v, 5); \
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w = rol(w, 30);
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#define R1(v,w,x,y,z,i) \
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z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \
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w = rol(w, 30);
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#define R2(v,w,x,y,z,i) \
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z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); w = rol(w, 30);
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#define R3(v,w,x,y,z,i) \
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z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \
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w = rol(w, 30);
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#define R4(v,w,x,y,z,i) \
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z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \
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w=rol(w, 30);
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/* Hash a single 512-bit block. This is the core of the algorithm. */
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static void mvSHA1Transform(MV_U32 state[5], const MV_U8 *buffer)
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{
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MV_U32 a, b, c, d, e;
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CHAR64LONG16* block;
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#ifdef SHA1HANDSOFF
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static MV_U32 workspace[16];
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block = (CHAR64LONG16 *) workspace;
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memcpy(block, buffer, 64);
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#else
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block = (CHAR64LONG16 *) buffer;
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#endif
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/* Copy context->state[] to working vars */
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a = state[0];
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b = state[1];
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c = state[2];
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d = state[3];
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e = state[4];
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/* 4 rounds of 20 operations each. Loop unrolled. */
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R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
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R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
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R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
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R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
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R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
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R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
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R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
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R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
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R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
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R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
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R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
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R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
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R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
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R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
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R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
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R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
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R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
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R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
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R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
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R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
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/* Add the working vars back into context.state[] */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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state[4] += e;
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/* Wipe variables */
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a = b = c = d = e = 0;
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}
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void mvSHA1Init(MV_SHA1_CTX* context)
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{
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/* SHA1 initialization constants */
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context->state[0] = 0x67452301;
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context->state[1] = 0xEFCDAB89;
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context->state[2] = 0x98BADCFE;
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context->state[3] = 0x10325476;
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context->state[4] = 0xC3D2E1F0;
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context->count[0] = context->count[1] = 0;
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}
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/* Run your data through this. */
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void mvSHA1Update(MV_SHA1_CTX *context, MV_U8 const *data,
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unsigned int len)
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{
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MV_U32 i, j;
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j = (context->count[0] >> 3) & 63;
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if ((context->count[0] += len << 3) < (len << 3))
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context->count[1]++;
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context->count[1] += (len >> 29);
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if ((j + len) > 63)
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{
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memcpy(&context->buffer[j], data, (i = 64-j));
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mvSHA1Transform(context->state, context->buffer);
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for ( ; i + 63 < len; i += 64)
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{
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mvSHA1Transform(context->state, &data[i]);
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}
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j = 0;
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}
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else
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{
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i = 0;
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}
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memcpy(&context->buffer[j], &data[i], len - i);
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}
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void mvSHA1Final(MV_U8* digest, MV_SHA1_CTX* context)
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{
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MV_U32 i;
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MV_U8 finalcount[8];
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for (i = 0; i < 8; i++)
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{
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finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] >>
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((3-(i & 3)) * 8) ) & 255); /* Endian independent */
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}
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mvSHA1Update(context, (const unsigned char *) "\200", 1);
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while ((context->count[0] & 504) != 448)
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{
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mvSHA1Update(context, (const unsigned char *) "\0", 1);
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}
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mvSHA1Update(context, finalcount, 8); /* Should cause a mvSHA1Transform()
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*/
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for (i = 0; i < 20; i++)
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{
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digest[i] = (unsigned char)
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((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
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}
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/* Wipe variables */
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i = 0;
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memset(context->buffer, 0, 64);
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memset(context->state, 0, 20);
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memset(context->count, 0, 8);
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memset(finalcount, 0, 8);
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#ifdef SHA1HANDSOFF /* make SHA1Transform overwrite it's own static vars */
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mvSHA1Transform(context->state, context->buffer);
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#endif
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}
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void mvSHA1(MV_U8 const *buf, unsigned int len, MV_U8* digest)
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{
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MV_SHA1_CTX ctx;
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mvSHA1Init(&ctx);
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mvSHA1Update(&ctx, buf, len);
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mvSHA1Final(digest, &ctx);
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}
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