aes.cpp

使用vc编写的加密解密程序

#include "stdafx.h"
#include "aes.h"

#define ROTWORD8(a)  ((a >> 8) | (a << 24))
#define ROTWORD16(a) ((a >> 16) | (a << 16))
#define ROTWORD24(a) ((a >> 24) | (a << 8))

static word Rcon[11] =
{
    0x00000000, 0x00000001, 0x00000002, 0x00000004, 0x00000008,
    0x00000010, 0x00000020, 0x00000040, 0x00000080, 0x0000001B, 0x00000036
};

static word Te0[256];
static word Te1[256];
static word Te2[256];
static word Te3[256];
static word Te4[256];

static word Td0[256];
static word Td1[256];
static word Td2[256];
static word Td3[256];
static word Td4[256];

static byte sbox[] =
{
    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
};

static byte invsbox[] =
{
    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
};

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

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

byte Mul01(byte b)
{
    return b;
}

byte Mul02(byte b)
{
    if (b < 0x80)
        return b << 1;
    else
        return (b << 1) ^ 0x1B;
}

byte Mul03(byte b)
{
    return Mul02(b) ^ b;
}

byte Mul09(byte b)
{
    return Mul02(Mul02(Mul02(b))) ^ b;
}

byte Mul0b(byte b)
{
    return Mul02(Mul02(Mul02(b))) ^ Mul02(b) ^ b;
}

byte Mul0d(byte b)
{
    return Mul02(Mul02(Mul02(b))) ^
        Mul02(Mul02(b)) ^ b;
}

byte Mul0e(byte b)
{
    return Mul02(Mul02(Mul02(b))) ^
        Mul02(Mul02(b)) ^ Mul02(b);
}

word Pack(byte a[4])
{
    return
        (word)(a[0]) | (word)(a[1] << 8) |
        (word)(a[2] << 16) | (word)(a[3] << 24);
}

void Unpack(word w, byte a[4])
{
    a[0] = (byte)(w);
    a[1] = (byte)(w >> 8);
    a[2] = (byte)(w >> 16);
    a[3] = (byte)(w >> 24);
}

word SubWord(word w)
{
    int i;
    byte t[4];

    Unpack(w, t);
    for (i = 0; i < 4; i++)
        t[i] = sbox[t[i]];
    
    return Pack(t);
}

void AES_inittab()
{
    int i;
    for (i = 0; i < 256; i++) {
        Te0[i]  = Mul03(sbox[i]) << 24;
        Te0[i] += Mul01(sbox[i]) << 16;
        Te0[i] += Mul01(sbox[i]) <<  8;
        Te0[i] += Mul02(sbox[i]);

        Te1[i]  = Mul01(sbox[i]) << 24;
        Te1[i] += Mul01(sbox[i]) << 16;
        Te1[i] += Mul02(sbox[i]) <<  8;
        Te1[i] += Mul03(sbox[i]);

        Te2[i]  = Mul01(sbox[i]) << 24;
        Te2[i] += Mul02(sbox[i]) << 16;
        Te2[i] += Mul03(sbox[i]) <<  8;
        Te2[i] += Mul01(sbox[i]);

        Te3[i]  = Mul02(sbox[i]) << 24;
        Te3[i] += Mul03(sbox[i]) << 16;
        Te3[i] += Mul01(sbox[i]) <<  8;
        Te3[i] += Mul01(sbox[i]);

        Te4[i]  = Mul01(sbox[i]) << 24;
        Te4[i] += Mul01(sbox[i]) << 16;
        Te4[i] += Mul01(sbox[i]) <<  8;
        Te4[i] += Mul01(sbox[i]);

        Td0[i]  = Mul0b(invsbox[i]) << 24;
        Td0[i] += Mul0d(invsbox[i]) << 16;
        Td0[i] += Mul09(invsbox[i]) <<  8;
        Td0[i] += Mul0e(invsbox[i]);

        Td1[i]  = Mul0d(invsbox[i]) << 24;
        Td1[i] += Mul09(invsbox[i]) << 16;
        Td1[i] += Mul0e(invsbox[i]) <<  8;
        Td1[i] += Mul0b(invsbox[i]);

        Td2[i]  = Mul09(invsbox[i]) << 24;
        Td2[i] += Mul0e(invsbox[i]) << 16;
        Td2[i] += Mul0b(invsbox[i]) <<  8;
        Td2[i] += Mul0d(invsbox[i]);

        Td3[i]  = Mul0e(invsbox[i]) << 24;
        Td3[i] += Mul0b(invsbox[i]) << 16;
        Td3[i] += Mul0d(invsbox[i]) <<  8;
        Td3[i] += Mul09(invsbox[i]);

        Td4[i]  = invsbox[Mul01(i)] << 24;
        Td4[i] += invsbox[Mul01(i)] << 16;
        Td4[i] += invsbox[Mul01(i)] <<  8;
        Td4[i] += invsbox[Mul01(i)];
    }
}