131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "prf_defs.h"
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#if (WX_AIRSYNC_CFG)
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include "gki.h"
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#include "app_airsync_md5.h"
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const uint32_t X[4][2] = {{0, 1}, {1, 5}, {5, 3}, {0, 7}};
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const uint32_t S[4][4] = {{ 7, 12, 17, 22 },{ 5, 9 , 14, 20 },{ 4, 11, 16, 23 },{ 6, 10, 15, 21 }};
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uint32_t F( uint32_t X, uint32_t Y, uint32_t Z )
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{
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return ( X & Y ) | ( ~X & Z );
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}
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uint32_t G( uint32_t X, uint32_t Y, uint32_t Z )
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{
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return ( X & Z ) | ( Y & ~Z );
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}
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uint32_t H( uint32_t X, uint32_t Y, uint32_t Z )
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{
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return X ^ Y ^ Z;
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}
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uint32_t I( uint32_t X, uint32_t Y, uint32_t Z )
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{
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return Y ^ ( X | ~Z );
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}
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// rotates x left s bits.
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uint32_t rotate_left( uint32_t x, uint32_t s )
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{
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return ( x << s ) | ( x >> ( 32 - s ) );
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}
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// Pre-processin
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uint32_t count_padding_bits ( uint32_t length )
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{
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// uint32_t div = length * BITS / BLOCK_SIZE;
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uint32_t mod = length * BITS % BLOCK_SIZE;
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uint32_t c_bits;
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if ( mod == 0 )
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{
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c_bits = MOD_SIZE;
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}
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else
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{
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c_bits = ( MOD_SIZE + BLOCK_SIZE - mod ) % BLOCK_SIZE;
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}
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return c_bits / BITS;
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}
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MD5String append_padding_bits ( char * argv )
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{
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uint32_t msg_length = strlen ( argv );
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uint32_t bit_length = count_padding_bits ( msg_length );
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uint64_t app_length = msg_length * BITS;
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MD5String string;
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string.str = (char *)GKI_getbuf(msg_length + bit_length + APP_SIZE / BITS);
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strncpy ( string.str, argv, msg_length );
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memset ( string.str + msg_length, 0, bit_length );
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string.str [ msg_length ] = SINGLE_ONE_BIT;
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memmove ( string.str + msg_length + bit_length, (char *)&app_length, sizeof( uint64_t ) );
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string.len = msg_length + bit_length + sizeof( uint64_t );
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return string;
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}
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int32_t wechat_md5 (char *argv, uint8_t *md5_32)
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{
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MD5String string;
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uint32_t w[16];
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uint32_t chain[4];
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uint32_t state[4];
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uint32_t ( *auxi[ 4 ])( uint32_t, uint32_t, uint32_t ) = { F, G, H, I };
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int sIdx;
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int wIdx;
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string = append_padding_bits ( argv );
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chain[0] = A;
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chain[1] = B;
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chain[2] = C;
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chain[3] = D;
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for (uint32_t j = 0; j < string.len; j += BLOCK_SIZE / BITS)
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{
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memmove ( (char *)w, string.str + j, BLOCK_SIZE / BITS );
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memmove ( state, chain, sizeof(chain) );
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for ( uint8_t roundIdx = 0; roundIdx < 4; roundIdx++ )
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{
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wIdx = X[ roundIdx ][ 0 ];
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sIdx = 0;
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for (uint8_t i = 0; i < 16; i++ )
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{
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state[sIdx] = state [(sIdx + 1)%4] + rotate_left( state[sIdx] +(*auxi[ roundIdx])( state[(sIdx+1) % 4],
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state[(sIdx+2) % 4],
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state[(sIdx+3) % 4]) + w[ wIdx ] + (uint32_t)floor((1ULL << 32) * fabs(sin( roundIdx * 16 + i + 1 )) ),
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S[ roundIdx ][ i % 4 ]);
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sIdx = ( sIdx + 3 ) % 4;
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wIdx = ( wIdx + X[ roundIdx ][ 1 ] ) & 0xF;
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}
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}
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chain[ 0 ] += state[ 0 ];
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chain[ 1 ] += state[ 1 ];
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chain[ 2 ] += state[ 2 ];
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chain[ 3 ] += state[ 3 ];
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}
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memmove ( md5_32 + 0, (char *)&chain[0], sizeof(uint32_t) );
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memmove ( md5_32 + 4, (char *)&chain[1], sizeof(uint32_t) );
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memmove ( md5_32 + 8, (char *)&chain[2], sizeof(uint32_t) );
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memmove ( md5_32 + 12, (char *)&chain[3], sizeof(uint32_t) );
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free(string.str);
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string.str = NULL;
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return EXIT_SUCCESS;
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}
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#endif ///WX_AIRSYNC_CFG
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