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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "aes.h"
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int one;
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int two;
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int three;
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int four;
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int index;
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int result;
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int pArray[4][4];
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int cArray[4][4];
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int wArray[4][4];
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int i,k;
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/**
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* SºÐ
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*/
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static const int S[16][16] = { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
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0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
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0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
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0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
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0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
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0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
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0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
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0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
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0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
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0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
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0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
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0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
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0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
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0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
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0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
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0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
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/**
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* ÄæSºÐ
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*/
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static const int S2[16][16] = { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
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0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
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0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
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0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
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0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
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0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
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0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
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0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
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0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
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0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
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0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
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0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
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0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
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0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
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0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
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0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
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/**
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* »ñÈ¡ÕûÐÎÊý¾ÝµÄµÍ8λµÄ×ó4¸öλ
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*/
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static int getLeft4Bit(int num) {
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int left = num & 0x000000f0;
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return left >> 4;
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}
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/**
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* »ñÈ¡ÕûÐÎÊý¾ÝµÄµÍ8λµÄÓÒ4¸öλ
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*/
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static int getRight4Bit(int num) {
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return num & 0x0000000f;
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}
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/**
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* ¸ù¾ÝË÷Òý£¬´ÓSºÐÖлñµÃÔªËØ
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*/
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static int getNumFromSBox(int index) {
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int row = getLeft4Bit(index);
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int col = getRight4Bit(index);
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return S[row][col];
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}
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/**
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* °ÑÒ»¸ö×Ö·ûת±ä³ÉÕûÐÍ
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*/
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static int getIntFromChar(char c) {
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int result = (int) c;
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return result & 0x000000ff;
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}
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/**
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* °Ñ16¸ö×Ö·ûת±ä³É4X4µÄÊý×飬
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* ¸Ã¾ØÕóÖÐ×Ö½ÚµÄÅÅÁÐ˳ÐòΪ´ÓÉϵ½Ï£¬
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* ´Ó×óµ½ÓÒÒÀ´ÎÅÅÁС£
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*/
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static void convertToIntArray(char *str, int pa[4][4]) {
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int k = 0,i=0,j=0;
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for(i = 0; i < 4; i++)
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for(j = 0; j < 4; j++) {
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pa[j][i] = getIntFromChar(str[k]);
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k++;
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}
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}
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/**
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* ´òÓ¡4X4µÄÊý×é
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*/
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static void printArray(int a[4][4]) {
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int i,j;
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for(i = 0; i < 4; i++){
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for(j = 0; j < 4; j++)
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printf("a[%d][%d] = 0x%x ", i, j, a[i][j]);
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printf("\n");
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}
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printf("\n");
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}
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/**
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* ´òÓ¡×Ö·û´®µÄASSCI£¬
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* ÒÔÊ®Áù½øÖÆÏÔʾ¡£
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*/
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static void printASSCI(char *str, int len) {
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int i;
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for(i = 0; i < len; i++)
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printf("0x%x ", getIntFromChar(str[i]));
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printf("\n");
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}
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/**
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* °ÑÁ¬ÐøµÄ4¸ö×Ö·ûºÏ²¢³ÉÒ»¸ö4×Ö½ÚµÄÕûÐÍ
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*/
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static int getWordFromStr(char *str)
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{
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one = getIntFromChar(str[0]);
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one = one << 24;
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two = getIntFromChar(str[1]);
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two = two << 16;
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three = getIntFromChar(str[2]);
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three = three << 8;
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four = getIntFromChar(str[3]);
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return one | two | three | four;
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}
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/**
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* °ÑÒ»¸ö4×Ö½ÚµÄÊýµÄµÚÒ»¡¢¶þ¡¢Èý¡¢Ëĸö×Ö½ÚÈ¡³ö£¬
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* Èë½øÒ»¸ö4¸öÔªËصÄÕûÐÍÊý×éÀïÃæ¡£
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*/
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static void splitIntToArray(int num, int array[4]) {
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one = num >> 24;
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array[0] = one & 0x000000ff;
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two = num >> 16;
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array[1] = two & 0x000000ff;
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three = num >> 8;
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array[2] = three & 0x000000ff;
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array[3] = num & 0x000000ff;
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}
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/**
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* ½«Êý×éÖеÄÔªËØÑ»·×óÒÆstepλ
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*/
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static void leftLoop4int(int array[4], int step) {
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int temp[4];
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int i;
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for(i = 0; i < 4; i++)
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temp[i] = array[i];
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index = step % 4 == 0 ? 0 : step % 4;
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for(i = 0; i < 4; i++){
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array[i] = temp[index];
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index++;
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index = index % 4;
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}
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}
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/**
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* °ÑÊý×éÖеĵÚÒ»¡¢¶þ¡¢ÈýºÍËÄÔªËØ·Ö±ð×÷Ϊ
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* 4×Ö½ÚÕûÐ͵ĵÚÒ»¡¢¶þ¡¢ÈýºÍËÄ×Ö½Ú£¬ºÏ²¢³ÉÒ»¸ö4×Ö½ÚÕûÐÍ
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*/
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static int mergeArrayToInt(int array[4]) {
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int one = array[0] << 24;
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int two = array[1] << 16;
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int three = array[2] << 8;
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int four = array[3];
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return one | two | three | four;
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}
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/**
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* ³£Á¿ÂÖÖµ±í
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*/
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static const int Rcon[10] = { 0x01000000, 0x02000000,
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0x04000000, 0x08000000,
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0x10000000, 0x20000000,
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0x40000000, 0x80000000,
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0x1b000000, 0x36000000 };
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/**
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* ÃÜÔ¿À©Õ¹ÖеÄTº¯Êý
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*/
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static int T(int num, int round) {
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int numArray[4];
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splitIntToArray(num, numArray);
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leftLoop4int(numArray, 1);//×ÖÑ»·
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//×Ö½Ú´ú»»
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for(i = 0; i < 4; i++)
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numArray[i] = getNumFromSBox(numArray[i]);
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result = mergeArrayToInt(numArray);
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return result ^ Rcon[round];
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}
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//ÃÜÔ¿¶ÔÓ¦µÄÀ©Õ¹Êý×é
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static int w[44];
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/**
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* À©Õ¹ÃÜÔ¿£¬½á¹ûÊÇ°Ñw[44]ÖеÄÿ¸öÔªËسõʼ»¯
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*/
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static void extendKey(char *key)
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{
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int i,j;
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for(i = 0; i < 4; i++)
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w[i] = getWordFromStr(key + i * 4);
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for(i = 4, j = 0; i < 44; i++)
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{
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if( i % 4 == 0)
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{
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w[i] = w[i - 4] ^ T(w[i - 1], j);
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j++;//ÏÂÒ»ÂÖ
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}
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else
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w[i] = w[i - 4] ^ w[i - 1];
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}
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}
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/**
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* ÂÖÃÜÔ¿¼Ó
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*/
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static void addRoundKey(int array[4][4], int round) {
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int warray[4];
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int i,j;
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for(i = 0; i < 4; i++) {
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splitIntToArray(w[ round * 4 + i], warray);
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for(j = 0; j < 4; j++) {
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array[j][i] = array[j][i] ^ warray[j];
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}
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}
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}
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/**
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* ×Ö½Ú´ú»»
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*/
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static void subBytes(int array[4][4]){
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int i,j;
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for(i = 0; i < 4; i++)
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for( j = 0; j < 4; j++)
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array[i][j] = getNumFromSBox(array[i][j]);
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}
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/**
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* ÐÐÒÆλ
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*/
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static void shiftRows(int array[4][4]) {
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int rowTwo[4], rowThree[4], rowFour[4];
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//¸´ÖÆ״̬¾ØÕóµÄµÚ2,3,4ÐÐ
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int i;
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for(i = 0; i < 4; i++) {
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rowTwo[i] = array[1][i];
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rowThree[i] = array[2][i];
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rowFour[i] = array[3][i];
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}
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//Ñ»·×óÒÆÏàÓ¦µÄλÊý
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leftLoop4int(rowTwo, 1);
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leftLoop4int(rowThree, 2);
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leftLoop4int(rowFour, 3);
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//°Ñ×óÒƺóµÄÐи´ÖÆ»Ø״̬¾ØÕóÖÐ
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for( i = 0; i < 4; i++) {
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array[1][i] = rowTwo[i];
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array[2][i] = rowThree[i];
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array[3][i] = rowFour[i];
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}
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}
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/**
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* ÁлìºÏÒªÓõ½µÄ¾ØÕó
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*/
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static const int colM[4][4] = { 2, 3, 1, 1,
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1, 2, 3, 1,
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1, 1, 2, 3,
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3, 1, 1, 2 };
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static int GFMul2(int s) {
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int result = s << 1;
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int a7 = result & 0x00000100;
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if(a7 != 0) {
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result = result & 0x000000ff;
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result = result ^ 0x1b;
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}
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return result;
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}
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static int GFMul3(int s) {
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return GFMul2(s) ^ s;
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}
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static int GFMul4(int s) {
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return GFMul2(GFMul2(s));
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}
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static int GFMul8(int s) {
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return GFMul2(GFMul4(s));
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}
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static int GFMul9(int s) {
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return GFMul8(s) ^ s;
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}
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static int GFMul11(int s) {
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return GFMul9(s) ^ GFMul2(s);
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}
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static int GFMul12(int s) {
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return GFMul8(s) ^ GFMul4(s);
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}
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static int GFMul13(int s) {
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return GFMul12(s) ^ s;
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}
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static int GFMul14(int s) {
|
|
|
return GFMul12(s) ^ GFMul2(s);
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* GFÉϵĶþÔªÔËËã
|
|
|
*/
|
|
|
static int GFMul(int n, int s) {
|
|
|
int result;
|
|
|
|
|
|
if(n == 1)
|
|
|
result = s;
|
|
|
else if(n == 2)
|
|
|
result = GFMul2(s);
|
|
|
else if(n == 3)
|
|
|
result = GFMul3(s);
|
|
|
else if(n == 0x9)
|
|
|
result = GFMul9(s);
|
|
|
else if(n == 0xb)//11
|
|
|
result = GFMul11(s);
|
|
|
else if(n == 0xd)//13
|
|
|
result = GFMul13(s);
|
|
|
else if(n == 0xe)//14
|
|
|
result = GFMul14(s);
|
|
|
|
|
|
return result;
|
|
|
}
|
|
|
/**
|
|
|
* ÁлìºÏ
|
|
|
*/
|
|
|
static void mixColumns(int array[4][4]) {
|
|
|
|
|
|
int tempArray[4][4];
|
|
|
int i,j;
|
|
|
for(i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++)
|
|
|
tempArray[i][j] = array[i][j];
|
|
|
|
|
|
for(i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++){
|
|
|
array[i][j] = GFMul(colM[i][0],tempArray[0][j]) ^ GFMul(colM[i][1],tempArray[1][j])
|
|
|
^ GFMul(colM[i][2],tempArray[2][j]) ^ GFMul(colM[i][3], tempArray[3][j]);
|
|
|
}
|
|
|
}
|
|
|
/**
|
|
|
* °Ñ4X4Êý×éת»Ø×Ö·û´®
|
|
|
*/
|
|
|
static void convertArrayToStr(int array[4][4], char *str) {
|
|
|
int i,j;
|
|
|
for(i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++)
|
|
|
*str++ = (char)array[j][i];
|
|
|
}
|
|
|
/**
|
|
|
* ¼ì²éÃÜÔ¿³¤¶È
|
|
|
*/
|
|
|
static int checkKeyLen(int len) {
|
|
|
if(len == 16)
|
|
|
return 1;
|
|
|
else
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* ²ÎÊý p: Ã÷ÎĵÄ×Ö·û´®Êý×é¡£
|
|
|
* ²ÎÊý plen: Ã÷Îĵij¤¶È¡£
|
|
|
* ²ÎÊý key: ÃÜÔ¿µÄ×Ö·û´®Êý×é¡£
|
|
|
*/
|
|
|
void aes(char *p, int plen, char *key){
|
|
|
|
|
|
int keylen = strlen(key);
|
|
|
|
|
|
if(!checkKeyLen(keylen)) {
|
|
|
printf("keylen erro;keylen=%d\n",keylen);
|
|
|
exit(0);
|
|
|
}
|
|
|
|
|
|
extendKey(key);//À©Õ¹ÃÜÔ¿
|
|
|
for(k = 0; k < plen; k += 16) {
|
|
|
convertToIntArray(p + k, pArray);
|
|
|
|
|
|
addRoundKey(pArray, 0);//Ò»¿ªÊ¼µÄÂÖÃÜÔ¿¼Ó
|
|
|
|
|
|
for(i = 1; i < 10; i++){//Ç°9ÂÖ
|
|
|
|
|
|
subBytes(pArray);//×Ö½Ú´ú»»
|
|
|
|
|
|
shiftRows(pArray);//ÐÐÒÆλ
|
|
|
|
|
|
mixColumns(pArray);//ÁлìºÏ
|
|
|
|
|
|
addRoundKey(pArray, i);
|
|
|
}
|
|
|
|
|
|
//µÚ10ÂÖ
|
|
|
subBytes(pArray);//×Ö½Ú´ú»»
|
|
|
|
|
|
shiftRows(pArray);//ÐÐÒÆλ
|
|
|
|
|
|
addRoundKey(pArray, 10);
|
|
|
|
|
|
convertArrayToStr(pArray, p + k);
|
|
|
}
|
|
|
}
|
|
|
/**
|
|
|
* ¸ù¾ÝË÷Òý´ÓÄæSºÐÖлñÈ¡Öµ
|
|
|
*/
|
|
|
static int getNumFromS1Box(int index) {
|
|
|
int row = getLeft4Bit(index);
|
|
|
int col = getRight4Bit(index);
|
|
|
return S2[row][col];
|
|
|
}
|
|
|
/**
|
|
|
* Äæ×ֽڱ任
|
|
|
*/
|
|
|
static void deSubBytes(int array[4][4]) {
|
|
|
int i,j;
|
|
|
for( i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++)
|
|
|
array[i][j] = getNumFromS1Box(array[i][j]);
|
|
|
}
|
|
|
/**
|
|
|
* °Ñ4¸öÔªËصÄÊý×éÑ»·ÓÒÒÆstepλ
|
|
|
*/
|
|
|
static void rightLoop4int(int array[4], int step) {
|
|
|
int temp[4];
|
|
|
int i;
|
|
|
for(i = 0; i < 4; i++)
|
|
|
temp[i] = array[i];
|
|
|
|
|
|
index = step % 4 == 0 ? 0 : step % 4;
|
|
|
index = 3 - index;
|
|
|
for(i = 3; i >= 0; i--) {
|
|
|
array[i] = temp[index];
|
|
|
index--;
|
|
|
index = index == -1 ? 3 : index;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* ÄæÐÐÒÆλ
|
|
|
*/
|
|
|
static void deShiftRows(int array[4][4]) {
|
|
|
int rowTwo[4], rowThree[4], rowFour[4];
|
|
|
int i;
|
|
|
for(i = 0; i < 4; i++) {
|
|
|
rowTwo[i] = array[1][i];
|
|
|
rowThree[i] = array[2][i];
|
|
|
rowFour[i] = array[3][i];
|
|
|
}
|
|
|
|
|
|
rightLoop4int(rowTwo, 1);
|
|
|
rightLoop4int(rowThree, 2);
|
|
|
rightLoop4int(rowFour, 3);
|
|
|
|
|
|
for(i = 0; i < 4; i++) {
|
|
|
array[1][i] = rowTwo[i];
|
|
|
array[2][i] = rowThree[i];
|
|
|
array[3][i] = rowFour[i];
|
|
|
}
|
|
|
}
|
|
|
/**
|
|
|
* ÄæÁлìºÏÓõ½µÄ¾ØÕó
|
|
|
*/
|
|
|
static const int deColM[4][4] = { 0xe, 0xb, 0xd, 0x9,
|
|
|
0x9, 0xe, 0xb, 0xd,
|
|
|
0xd, 0x9, 0xe, 0xb,
|
|
|
0xb, 0xd, 0x9, 0xe };
|
|
|
|
|
|
/**
|
|
|
* ÄæÁлìºÏ
|
|
|
*/
|
|
|
static void deMixColumns(int array[4][4]) {
|
|
|
int tempArray[4][4];
|
|
|
int i,j;
|
|
|
for(i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++)
|
|
|
tempArray[i][j] = array[i][j];
|
|
|
|
|
|
for(i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++){
|
|
|
array[i][j] = GFMul(deColM[i][0],tempArray[0][j]) ^ GFMul(deColM[i][1],tempArray[1][j])
|
|
|
^ GFMul(deColM[i][2],tempArray[2][j]) ^ GFMul(deColM[i][3], tempArray[3][j]);
|
|
|
}
|
|
|
}
|
|
|
/**
|
|
|
* °ÑÁ½¸ö4X4Êý×é½øÐÐÒì»ò
|
|
|
*/
|
|
|
static void addRoundTowArray(int aArray[4][4],int bArray[4][4]) {
|
|
|
int i,j;
|
|
|
for(i = 0; i < 4; i++)
|
|
|
for(j = 0; j < 4; j++)
|
|
|
aArray[i][j] = aArray[i][j] ^ bArray[i][j];
|
|
|
}
|
|
|
/**
|
|
|
* ´Ó4¸ö32λµÄÃÜÔ¿×ÖÖлñµÃ4X4Êý×飬
|
|
|
* ÓÃÓÚ½øÐÐÄæÁлìºÏ
|
|
|
*/
|
|
|
static void getArrayFrom4W(int i, int array[4][4]) {
|
|
|
int index = i * 4;
|
|
|
int colOne[4], colTwo[4], colThree[4], colFour[4];
|
|
|
splitIntToArray(w[index], colOne);
|
|
|
splitIntToArray(w[index + 1], colTwo);
|
|
|
splitIntToArray(w[index + 2], colThree);
|
|
|
splitIntToArray(w[index + 3], colFour);
|
|
|
|
|
|
for(i = 0; i < 4; i++) {
|
|
|
array[i][0] = colOne[i];
|
|
|
array[i][1] = colTwo[i];
|
|
|
array[i][2] = colThree[i];
|
|
|
array[i][3] = colFour[i];
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* ²ÎÊý c: ÃÜÎĵÄ×Ö·û´®Êý×é¡£
|
|
|
* ²ÎÊý clen: ÃÜÎĵij¤¶È¡£
|
|
|
* ²ÎÊý key: ÃÜÔ¿µÄ×Ö·û´®Êý×é¡£
|
|
|
*/
|
|
|
void deAes(char *c, int clen, char *key) {
|
|
|
|
|
|
int keylen = strlen(key);
|
|
|
if(clen == 0 || clen % 16 != 0) {
|
|
|
printf("Ciphertext characters must be a multiple of 16! Now the length is zero:%d\n",clen);
|
|
|
exit(0);
|
|
|
}
|
|
|
|
|
|
if(!checkKeyLen(keylen)) {
|
|
|
printf("Key character length error! The lengths must be 16, 24, and 32. The current length is:%d\n",keylen);
|
|
|
exit(0);
|
|
|
}
|
|
|
|
|
|
extendKey(key);//À©Õ¹ÃÜÔ¿
|
|
|
for(k = 0; k < clen; k += 16) {
|
|
|
convertToIntArray(c + k, cArray);
|
|
|
|
|
|
|
|
|
addRoundKey(cArray, 10);
|
|
|
|
|
|
for(i = 9; i >= 1; i--) {
|
|
|
deSubBytes(cArray);
|
|
|
|
|
|
deShiftRows(cArray);
|
|
|
|
|
|
deMixColumns(cArray);
|
|
|
getArrayFrom4W(i, wArray);
|
|
|
deMixColumns(wArray);
|
|
|
|
|
|
addRoundTowArray(cArray, wArray);
|
|
|
}
|
|
|
|
|
|
deSubBytes(cArray);
|
|
|
|
|
|
deShiftRows(cArray);
|
|
|
|
|
|
addRoundKey(cArray, 0);
|
|
|
|
|
|
convertArrayToStr(cArray, c + k);
|
|
|
|
|
|
}
|
|
|
} |
