AES算法C源代码.docx
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#include
#include
#include
#include
#include
#defineNb4//分组大小为4
intNr=0;//轮数定义为0，实际值在程序中获取
intNk=0;//密钥长度定义为0，实际值在程序中获取
intNc=128;//Nc为密钥长度，只能为128,192或256
//in：
存储明文的数组
//out：
存储密文的数组
//state：
存储中间状态的数组
unsignedcharin[16],out[32],state[4][4];
unsignedcharRoundKey[240];//存储轮密钥的数组
unsignedcharKey[32];//存储输入的密钥
intgetSBoxInvert（intnum）
{
//逆S盒子
intrsbox[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};
returnrsbox[num];
}
intgetSBoxValue（intnum）
{
//S盒子
intsbox[256]={
//0123456789ABCDEF
0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76,
0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0,
0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15,
0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75,
0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84,
0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf,
0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8,
0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2,
0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73,
0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb,
0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79,
0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08,
0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a,
0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e,
0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf,
0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16};
returnsbox[num];
}
//Theroundconstantwordarray,Rcon[i],containsthevaluesgivenby
//xtothepower（i-1）beingpowersofx（xisdenotedas{02}）inthefieldGF（2^8）
//Notethatistartsat1,not0）.
intRcon[255]={
0x8d,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x1b,0x36,0x6c,0xd8,0xab,0x4d,0x9a,
0x2f,0x5e,0xbc,0x63,0xc6,0x97,0x35,0x6a,0xd4,0xb3,0x7d,0xfa,0xef,0xc5,0x91,0x39,
0x72,0xe4,0xd3,0xbd,0x61,0xc2,0x9f,0x25,0x4a,0x94,0x33,0x66,0xcc,0x83,0x1d,0x3a,
0x74,0xe8,0xcb,0x8d,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x1b,0x36,0x6c,0xd8,
0xab,0x4d,0x9a,0x2f,0x5e,0xbc,0x63,0xc6,0x97,0x35,0x6a,0xd4,0xb3,0x7d,0xfa,0xef,
0xc5,0x91,0x39,0x72,0xe4,0xd3,0xbd,0x61,0xc2,0x9f,0x25,0x4a,0x94,0x33,0x66,0xcc,
0x83,0x1d,0x3a,0x74,0xe8,0xcb,0x8d,0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x1b,
0x36,0x6c,0xd8,0xab,0x4d,0x9a,0x2f,0x5e,0xbc,0x63,0xc6,0x97,0x35,0x6a,0xd4,0xb3,
0x7d,0xfa,0xef,0xc5,0x91,0x39,0x72,0xe4,0xd3,0xbd,0x61,0xc2,0x9f,0x25,0x4a,0x94,
0x33,0x66,0xcc,0x83,0x1d,0x3a,0x74,0xe8,0xcb,0x8d,0x01,0x02,0x04,0x08,0x10,0x20,
0x40,0x80,0x1b,0x36,0x6c,0xd8,0xab,0x4d,0x9a,0x2f,0x5e,0xbc,0x63,0xc6,0x97,0x35,
0x6a,0xd4,0xb3,0x7d,0xfa,0xef,0xc5,0x91,0x39,0x72,0xe4,0xd3,0xbd,0x61,0xc2,0x9f,
0x25,0x4a,0x94,0x33,0x66,0xcc,0x83,0x1d,0x3a,0x74,0xe8,0xcb,0x8d,0x01,0x02,0x04,
0x08,0x10,0x20,0x40,0x80,0x1b,0x36,0x6c,0xd8,0xab,0x4d,0x9a,0x2f,0x5e,0xbc,0x63,
0xc6,0x97,0x35,0x6a,0xd4,0xb3,0x7d,0xfa,0xef,0xc5,0x91,0x39,0x72,0xe4,0xd3,0xbd,
0x61,0xc2,0x9f,0x25,0x4a,0x94,0x33,0x66,0xcc,0x83,0x1d,0x3a,0x74,0xe8,0xcb};
//密钥扩展，生成Nb（Nr+1）的轮密钥，用于每轮的解密密钥
voidKeyExpansion（）
{
inti,j;
unsignedchartemp[4],k;
//第一个密钥为密钥本身
for（i=0;i{
RoundKey[i*4]=Key[i*4];
RoundKey[i*4+1]=Key[i*4+1];
RoundKey[i*4+2]=Key[i*4+2];
RoundKey[i*4+3]=Key[i*4+3];
}
//其它密钥由第一个密钥进行扩展得到
while（i<（Nb*（Nr+1）））
{
for（j=0;j<4;j++）
{
temp[j]=RoundKey[（i-1）*4+j];
}
if（i%Nk==0）
{
//将四个字节进行左移一位，即[a0,a1,a2,a3]变为[a1,a2,a3,a0]
{
k=temp[0];
temp[0]=temp[1];
temp[1]=temp[2];
temp[2]=temp[3];
temp[3]=k;
}
//SubWord（）isafunctionthattakesafour-byteinputwordand
//appliestheS-boxtoeachofthefourbytestoproduceanoutputword.
{
temp[0]=getSBoxValue（temp[0]）;
temp[1]=getSBoxValue（temp[1]）;
temp[2]=getSBoxValue（temp[2]）;
temp[3]=getSBoxValue（temp[3]）;
}
temp[0]=temp[0]^Rcon[i/Nk];
}
elseif（Nk>6&&i%Nk==4）
{
{
temp[0]=getSBoxValue（temp[0]）;
temp[1]=getSBoxValue（temp[1]）;
temp[2]=getSBoxValue（temp[2]）;
temp[3]=getSBoxValue（temp[3]）;
}
}
RoundKey[i*4+0]=RoundKey[（i-Nk）*4+0]^temp[0];
RoundKey[i*4+1]=RoundKey[（i-Nk）*4+1]^temp[1];
RoundKey[i*4+2]=RoundKey[（i-Nk）*4+2]^temp[2];
RoundKey[i*4+3]=RoundKey[（i-Nk）*4+3]^temp[3];
i++;
}
}
//Thisfunctionaddstheroundkeytostate.
//TheroundkeyisaddedtothestatebyanXORfunction.
voidAddRoundKey（intround）
{
inti,j;
for（i=0;i<4;i++）
{
for（j=0;j<4;j++）
{
state[j][i]^=RoundKey[round*Nb*4+i*Nb+j];
}
}
}
//TheSubBytesFunctionSubstitutesthevaluesinthe
//statematrixwithvaluesinanS-box.
voidInvSubBytes（）
{
inti,j;
for（i=0;i<4;i++）
{
for（j=0;j<4;j++）
{
state[i][j]=getSBoxInvert（state[i][j]）;
}
}
}
//TheShiftRows（）functionshiftstherowsinthestatetotheleft.
//Eachrowisshiftedwithdifferentoffset.
//Offset=Rownumber.Sothefirstrowisnotshifted.
voidInvShiftRows（）
{
unsignedchartemp;
//Rotatefirstrow1columnstoright
temp=state[1][3];
state[1][3]=state[1][2];
state[1][2]=state[1][1];
state[1][1]=state[1][0];
state[1][0]=temp;
//Rotatesecondrow2columnstoright
temp=state[2][0];
state[2][0]=state[2][2];
state[2][2]=temp;
temp=state[2][1];
state[2][1]=state[2][3];
state[2][3]=temp;
//Rotatethirdrow3columnstoright
temp=state[3][0];
state[3][0]=state[3][1];
state[3][1]=state[3][2];
state[3][2]=state[3][3];
state[3][3]=temp;
}
//xtimeisamacrothatfindstheproductof{02}andtheargumenttoxtimemodulo{1b}
#definextime（x）（（x<<1）^（（（x>>7）&1）*0x1b））
//MultipltyisamacrousedtomultiplynumbersinthefieldGF（2^8）
#defineMultiply（x,y）（（（y&1）*x）^（（y>>1&1）*xtime（x））^（（y>>2&1）*xtime（xtime（x）））^（（y>>3&1）*xtime（xtime（xtime（x））））^（（y>>4&1）*xtime（xtime（xtime（xtime（x））））））
//MixColumnsfunctionmixesthecolumnsofthestatematrix.
//Themethodusedtomultiplymaybedifficulttounderstandfortheinexperienced.
//Pleaseusethereferencestogainmoreinformation.
voidInvMixColumns（）
{
inti;
unsignedchara,b,c,d;
for（i=0;i<4;i++）
{
a=state[0][i];
b=state[1][i];
c=state[2][i];
d=state[3][i];
state[0][i]=Multiply（a,0x0e）^Multiply（b,0x0b）^Multiply（c,0x0d）^Multiply（d,0x09）;
state[1][i]=Multiply（a,0x09）^Multiply（b,0x0e）^Multiply（c,0x0b）^Multiply（d,0x0d）;
state[2][i]=Multiply（a,0x0d）^Multiply（b,0x09）^Multiply（c,0x0e）^Multiply（d,0x0b）;
s
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