aesde.cpp

AES加密解密

#include "AESDE.h"
int invsubbox[256]=
{
 0x52, 0x09, 0x6a, 0xd5,0x30, 0x36, 0xa5,0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
 0x7c, 0xe3, 0x39, 0x82,0x9b ,0x2f, 0xff,0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
 0x54, 0x7b, 0x94, 0x32,0xa6 ,0xc2, 0x23,0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
 0x08, 0x2e, 0xa1, 0x66,0x28 ,0xd9, 0x24,0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
 0x72, 0xf8, 0xf6, 0x64,0x86 ,0x68, 0x98,0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
 0x6c, 0x70, 0x48, 0x50,0xfd ,0xed, 0xb9,0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
 0x90, 0xd8, 0xab, 0x00,0x8c ,0xbc, 0xd3,0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
 0xd0, 0x2c, 0x1e, 0x8f,0xca ,0x3f, 0x0f,0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
 0x3a, 0x91, 0x11, 0x41,0x4f ,0x67, 0xdc,0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
 0x96, 0xac, 0x74, 0x22,0xe7 ,0xad, 0x35,0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
 0x47, 0xf1, 0x1a, 0x71,0x1d ,0x29, 0xc5,0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
 0xfc, 0x56, 0x3e, 0x4b,0xc6 ,0xd2, 0x79,0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
 0x1f, 0xdd, 0xa8, 0x33,0x88 ,0x07, 0xc7,0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
 0x60, 0x51, 0x7f, 0xa9,0x19 ,0xb5, 0x4a,0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
 0xa0, 0xe0, 0x3b, 0x4d,0xae ,0x2a, 0xf5,0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
 0x17, 0x2b, 0x04, 0x7e,0xba ,0x77, 0xd6,0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
};  


int subbox[256]=
{
	 99, 124, 119, 123, 242, 107, 111, 197,  48,   1, 103,  43, 254, 215, 171, 118, 
	202, 130, 201, 125, 250,  89,  71, 240, 173, 212, 162, 175, 156, 164, 114, 192, 
	183, 253, 147,  38,  54,  63, 247, 204,  52, 165, 229, 241, 113, 216,  49,  21, 
	  4, 199,  35, 195,  24, 150,   5, 154,   7,  18, 128, 226, 235,  39, 178, 117, 
	  9, 131,  44,  26,  27, 110,  90, 160,  82,  59, 214, 179,  41, 227,  47, 132, 
	 83, 209,   0, 237,  32, 252, 177,  91, 106, 203, 190,  57,  74,  76,  88, 207, 
	208, 239, 170, 251,  67,  77,  51, 133,  69, 249,   2, 127,  80,  60, 159, 168, 
	 81, 163,  64, 143, 146, 157,  56, 245, 188, 182, 218,  33,  16, 255, 243, 210, 
	205,  12,  19, 236,  95, 151,  68,  23, 196, 167, 126,  61, 100,  93,  25, 115, 
	 96, 129,  79, 220,  34,  42, 144, 136,  70, 238, 184,  20, 222,  94,  11, 219, 
	224,  50,  58,  10,  73,   6,  36,  92, 194, 211, 172,  98, 145, 149, 228, 121, 
	231, 200,  55, 109, 141, 213,  78, 169, 108,  86, 244, 234, 101, 122, 174,   8, 
	186, 120,  37,  46,  28, 166, 180, 198, 232, 221, 116,  31,  75, 189, 139, 138, 
	112,  62, 181, 102,  72,   3, 246,  14,  97,  53,  87, 185, 134, 193,  29, 158, 
	225, 248, 152,  17, 105, 217, 142, 148, 155,  30, 135, 233, 206,  85,  40, 223, 
	140, 161, 137,  13, 191, 230,  66, 104,  65, 153,  45,  15, 176,  84, 187,  22
};

int invaroundkeys[12]=
{
	0x01,0x02,0x04,0x08,
	0x10,0x20,0x40,0x80,
	0x1b,0x36,0x6c,0x6c
};

int invmix[16]=
{
	0x0e,0x0b,0x0d,0x09,
        0x09,0x0e,0x0b,0x0d,
	0x0d,0x09,0x0e,0x0b,
	0x0b,0x0d,0x09,0x0e
};

int aroundkeytalbe[10+1][16];

int mixkey[4];

void invgetmixkey(int *qkey)
{
	for(int i=0;i<4;i++)
		mixkey[i]=qkey[(i+1)*4-1];
}

void invxor(int *p,int n)
{
	for(int i=0;i<16;i++)
	{
		bitset<8> temp1(p[i]);
                bitset<8> temp2(aroundkeytalbe[n][i]);
		temp1^=temp2;
		p[i]=temp1.to_ulong();
	}
}


void invinvSbox(int *p,int n)
{
	for(int i=0;i<n;i++)
		p[i]=invsubbox[p[i]];
}


void invshift(int *p)
{
	int n=4,temp;
	for(int i=0;i<4;i++){
		for(int k=0;k<i;k++){
			for(int j=0;j<4-1;j++){
			    temp=p[(i+1)*n-j-1];
			    p[(i+1)*n-j-1]=p[(i+1)*n-j-1-1];
			    p[(i+1)*n-j-1-1]=temp;
			}
		}
	}
}

void invmixcolum(int *p)
{
	int *q,stack[4];
	q=new int[4*4];
	for(int k=0;k<4;k++){
		for(int i=0;i<4;i++){
			bitset<8> temp;
			for(int j=0;j<4;j++){
				bitset<8> bit(p[j*4+k]);
				bitset<8> conf(0x1b);
				bitset<8> self(p[j*4+k]);
                
				for(int l=0;l<4;l++)
				{
				    if(bit.test(7))
					{
					   bit<<=1;
					   bit^=conf;
					}
					else
					   bit<<=1;
				stack[l]=bit.to_ulong();
                }

				if(invmix[i*4+j]==0x09){
					bitset<8> compute(stack[2]);
                                        self^=compute;
		                        temp^=self;
		      		}
				else if(invmix[i*4+j]==0x0b)
				{
					bitset<8> compute(stack[2]);
					bitset<8> compute1(stack[0]);
                                        compute^=compute1;
                                        self^=compute;
				        temp^=self;
				}
				else if(invmix[i*4+j]==0x0d)
				{
					bitset<8> compute(stack[2]);
					bitset<8> compute1(stack[1]);
                                        compute^=compute1;
					self^=compute;
				        temp^=self;
				}
				else
				{
					bitset<8> compute(stack[2]);
					bitset<8> compute1(stack[1]);
					bitset<8> compute2(stack[0]);
                                        compute^=compute1;
                                        compute^=compute2;
			                temp^=compute;
				}
			}
			q[i*4+k]=temp.to_ulong();
		}
	}

	for(int l=0;l<16;l++)
		p[l]=q[l];
}
//----------------------------------------------------------------------------------------------
void invrotword(int *p)
{
	int temp;
	for(int i=0;i<4-1;i++){
		temp=p[i];
		p[i]=p[i+1];
		p[i+1]=temp;

	}
}

void invSboxs(int *p,int n)
{
	for(int i=0;i<n;i++)
		p[i]=subbox[p[i]];
}

void invxorrcon(int *p,int around)
{
	bitset<8> bit(invaroundkeys[around]);
	bitset<8> temp(p[0]);
	temp^=bit;
	p[0]=temp.to_ulong();
}

void invupdatekey(int *p)
{
	for(int i=0;i<4;i++){
		for(int j=0;j<4;j++){
			bitset<8> temp1(p[i+j*4]);
			bitset<8> temp2(mixkey[j]);
			temp1^=temp2;
			mixkey[j]=temp1.to_ulong();
			p[i+j*4]=temp1.to_ulong();
		}
	}
}

void invcopy(int n,int *key){
	for(int i=0;i<16;i++)
        aroundkeytalbe[n][i]=key[i];
}

void invcreatearoundkeytable(int *key){
	for(int i=0;i<11;i++){
		invcopy(i,key);
		invgetmixkey(key);
	    invrotword(mixkey);
            invSboxs(mixkey,4);
	    invxorrcon(mixkey,i);
	    invupdatekey(key);
	}
}
       /*
void p(){
	for(int i=0;i<11;i++){
		for(int j=0;j<16;j++){
			cout<<setbase(16)<<aroundkeytalbe[i][j]<<" ";
		//	printf("%3d ",aroundkeytalbe[i][j]);
			if((j+1)%4==0)
				cout<<"\n";
		}
		cout<<"\n";
	}
}
  */
void invstart(int *input,int *key){
        
	invcreatearoundkeytable(key);

	invxor(input,10);
      //	print(input,16,"Xor");
	invshift(input);
    //	print(input,16,"shift");
    	invinvSbox(input,16);
     //	print(input,16,"Sbox");

	int i;
	for(i=9;i>0;i--){
       //		cout<<i<<"\n";
		invxor(input,i);
       //		print(input,16,"Xor");
		invmixcolum(input);
	 //	print(input,16,"mixcolum");
		invshift(input);
	//	print(input,16,"shift");
	    invinvSbox(input,16);
      //		print(input,16,"Sbox");
	}
	invxor(input,i);
//	print(input,16,"Xor");
}