char Encrypted_data[]="A09282E69616D602020202A0A372F5F5E69616D6F5F57202D3D302F5F556D616E6F5F5026696A0A0A0924627F67737371607F53656468247E696270702020202A047C65737562702465647079727365646024757074757F6023202020202A0A092825646F6365646E2D5A36313B5E69626F536564602D3024627F67737371607F536564602020202A01647164602D6F646E61627025667F6D65627023202020202A0A0D5461607D2864776E656C6A3B5E69626F536564602D302E69626F536564602020202A076E69646461607025667F6D65627023202020202A0A0E62757475627020202020202020202020202A09272E2164716460246564707972736E656024696C61667E69602C2470797273656460247F6E602E6163602A327F6272754728247E6962707020202020202020202020202A0A346160702D31202D51302D20296D2864776E656C6B5E69626F53656460266960202020202020202A0A392461607825676E6162702E69602960227F66602020202A0E627574756270202020202020202A09272E2164716460246564707972736E656024696C61667E69602C2470797273656460247F6E602E6163602A327F6272754728247E69627070202020202020202A0A3631302E30246160702669602020202A092D513D2864776E656C6B5E69626F53656468247E69602D30246160702020202A092E69626F536564682E656C602D302864776E656C602020202A076E6964646160702733736B6073202B636568636023202020202A0A0E627574756270202020202020202A09272E24707972736564602E656867702E6F6964707563687560247F67602A327F6272754728247E69627070202020202020202A0A35602371602E6F6964707563687540247075636875602020202A092E69626F536E6568247079727365646E237561602D302E69626F53656460202020202020202A0A397274702020202A04707972736564602F646023202020202A0A0929267968297162727165647972602C2342434F55444F4D4E235541402C2929756B682971627271656479726827756E6E235541402D30237561602020202A0D50303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C20303870302C203038703B502D302679602020202A0D50202020202020202020202A0C27363870302C27383870302C25646870302C29323870302C20323870302C27323870302C23626870302C27383870302C21626870302C21636870302C24623870302C27393870302C21303870302C21633870302C23353870302C2538387030202020202020202020202A0C20353870302C24383870302C23666870302C22383870302C27343870302C29336870302C21363870302C21616870302C23313870302C23333870302C24336870302C21343870302C22633870302C25663870302C26326870302C263468703B502D3029756B602020202A067960246E616029756B60256271607562707023202020202A0A0E627574756270202020202020202A09272E2864776E656C60246162602C24627F677373716070246564707972736E656024696C61667E69602A327F6272754728247E69627070202020202020202A0A3631302D3C30292E69626F536E65682E656C602669602020202A09256572745D35647164696C6166702C292825646F636E656E24627F67737371607F536E656825646F6365646436326E243635637162602D302E69626F536E65602020202A05646F636564602436356371626023202020202A0A0D513B567762716E237973702D3024627F67737371607F536E65602020202A0A0A39282E69616D602665646A0A0A0355414024727F607D69602275686079634E2F6470797273402D6F62766A0A0379737024727F607D696A0436356371626024727F607D696A033D3C6566756C6F55676165776E616C602A3E6F6864797360232A033E68FC2B73B010CD805CF9D1CE1A8C64BC2";
int encrypted_text_len=1483;

const char key[16] = "aixiao.me";
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <ctype.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdbool.h>
#define CBC 1
#define CTR 1
#define ECB 1
#ifndef _AES_H_
#define _AES_H_

#include <stdint.h>
#include <stddef.h>

#ifndef CBC
#define CBC 1
#endif

#ifndef ECB
#define ECB 1
#endif

#ifndef CTR
#define CTR 1
#endif

#define AES128 1
//#define AES192 1
//#define AES256 1

#define AES_BLOCKLEN 16         // Block length in bytes - AES is 128b block only

#if defined(AES256) && (AES256 == 1)
#define AES_KEYLEN 32
#define AES_keyExpSize 240
#elif defined(AES192) && (AES192 == 1)
#define AES_KEYLEN 24
#define AES_keyExpSize 208
#else
#define AES_KEYLEN 16           // Key length in bytes
#define AES_keyExpSize 176
#endif

struct AES_ctx {
    uint8_t RoundKey[AES_keyExpSize];
#if (defined(CBC) && (CBC == 1)) || (defined(CTR) && (CTR == 1))
    uint8_t Iv[AES_BLOCKLEN];
#endif
};

void AES_init_ctx(struct AES_ctx *ctx, const uint8_t * key);
#if (defined(CBC) && (CBC == 1)) || (defined(CTR) && (CTR == 1))
void AES_init_ctx_iv(struct AES_ctx *ctx, const uint8_t * key, const uint8_t * iv);
void AES_ctx_set_iv(struct AES_ctx *ctx, const uint8_t * iv);
#endif

#if defined(ECB) && (ECB == 1)
void AES_ECB_encrypt(const struct AES_ctx *ctx, uint8_t * buf);
void AES_ECB_decrypt(const struct AES_ctx *ctx, uint8_t * buf);

#endif // #if defined(ECB) && (ECB == !)

#if defined(CBC) && (CBC == 1)
void AES_CBC_encrypt_buffer(struct AES_ctx *ctx, uint8_t * buf, size_t length);
void AES_CBC_decrypt_buffer(struct AES_ctx *ctx, uint8_t * buf, size_t length);

#endif // #if defined(CBC) && (CBC == 1)

#if defined(CTR) && (CTR == 1)

void AES_CTR_xcrypt_buffer(struct AES_ctx *ctx, uint8_t * buf, size_t length);

#endif // #if defined(CTR) && (CTR == 1)

#endif // _AES_H_


#define Nb 4

#if defined(AES256) && (AES256 == 1)
#define Nk 8
#define Nr 14
#elif defined(AES192) && (AES192 == 1)
#define Nk 6
#define Nr 12
#else
#define Nk 4                    // The number of 32 bit words in a key.
#define Nr 10                   // The number of rounds in AES Cipher.
#endif

#ifndef MULTIPLY_AS_A_FUNCTION
#define MULTIPLY_AS_A_FUNCTION 0
#endif

typedef uint8_t state_t[4][4];

static const uint8_t sbox[256] = {
    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
};

#if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)
static const uint8_t rsbox[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
};
#endif

static const uint8_t Rcon[11] = {
    0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36
};

#define getSBoxValue(num) (sbox[(num)])

static void KeyExpansion(uint8_t * RoundKey, const uint8_t * Key)
{
    unsigned i, j, k;
    uint8_t tempa[4];           // Used for the column/row operations

    for (i = 0; i < Nk; ++i) {
        RoundKey[(i * 4) + 0] = Key[(i * 4) + 0];
        RoundKey[(i * 4) + 1] = Key[(i * 4) + 1];
        RoundKey[(i * 4) + 2] = Key[(i * 4) + 2];
        RoundKey[(i * 4) + 3] = Key[(i * 4) + 3];
    }

    for (i = Nk; i < Nb * (Nr + 1); ++i) {
        {
            k = (i - 1) * 4;
            tempa[0] = RoundKey[k + 0];
            tempa[1] = RoundKey[k + 1];
            tempa[2] = RoundKey[k + 2];
            tempa[3] = RoundKey[k + 3];

        }

        if (i % Nk == 0) {
            {
                const uint8_t u8tmp = tempa[0];
                tempa[0] = tempa[1];
                tempa[1] = tempa[2];
                tempa[2] = tempa[3];
                tempa[3] = u8tmp;
            }

            {
                tempa[0] = getSBoxValue(tempa[0]);
                tempa[1] = getSBoxValue(tempa[1]);
                tempa[2] = getSBoxValue(tempa[2]);
                tempa[3] = getSBoxValue(tempa[3]);
            }

            tempa[0] = tempa[0] ^ Rcon[i / Nk];
        }
#if defined(AES256) && (AES256 == 1)
        if (i % Nk == 4) {
            {
                tempa[0] = getSBoxValue(tempa[0]);
                tempa[1] = getSBoxValue(tempa[1]);
                tempa[2] = getSBoxValue(tempa[2]);
                tempa[3] = getSBoxValue(tempa[3]);
            }
        }
#endif
        j = i * 4;
        k = (i - Nk) * 4;
        RoundKey[j + 0] = RoundKey[k + 0] ^ tempa[0];
        RoundKey[j + 1] = RoundKey[k + 1] ^ tempa[1];
        RoundKey[j + 2] = RoundKey[k + 2] ^ tempa[2];
        RoundKey[j + 3] = RoundKey[k + 3] ^ tempa[3];
    }
}

void AES_init_ctx(struct AES_ctx *ctx, const uint8_t * key)
{
    KeyExpansion(ctx->RoundKey, key);
}

#if (defined(CBC) && (CBC == 1)) || (defined(CTR) && (CTR == 1))
void AES_init_ctx_iv(struct AES_ctx *ctx, const uint8_t * key, const uint8_t * iv)
{
    KeyExpansion(ctx->RoundKey, key);
    memcpy(ctx->Iv, iv, AES_BLOCKLEN);
}

void AES_ctx_set_iv(struct AES_ctx *ctx, const uint8_t * iv)
{
    memcpy(ctx->Iv, iv, AES_BLOCKLEN);
}
#endif

static void AddRoundKey(uint8_t round, state_t * state, const uint8_t * RoundKey)
{
    uint8_t i, j;
    for (i = 0; i < 4; ++i) {
        for (j = 0; j < 4; ++j) {
            (*state)[i][j] ^= RoundKey[(round * Nb * 4) + (i * Nb) + j];
        }
    }
}

static void SubBytes(state_t * state)
{
    uint8_t i, j;
    for (i = 0; i < 4; ++i) {
        for (j = 0; j < 4; ++j) {
            (*state)[j][i] = getSBoxValue((*state)[j][i]);
        }
    }
}

static void ShiftRows(state_t * state)
{
    uint8_t temp;

    temp = (*state)[0][1];
    (*state)[0][1] = (*state)[1][1];
    (*state)[1][1] = (*state)[2][1];
    (*state)[2][1] = (*state)[3][1];
    (*state)[3][1] = temp;
 
    temp = (*state)[0][2];
    (*state)[0][2] = (*state)[2][2];
    (*state)[2][2] = temp;

    temp = (*state)[1][2];
    (*state)[1][2] = (*state)[3][2];
    (*state)[3][2] = temp;

    temp = (*state)[0][3];
    (*state)[0][3] = (*state)[3][3];
    (*state)[3][3] = (*state)[2][3];
    (*state)[2][3] = (*state)[1][3];
    (*state)[1][3] = temp;
}

static uint8_t xtime(uint8_t x)
{
    return ((x << 1) ^ (((x >> 7) & 1) * 0x1b));
}

static void MixColumns(state_t * state)
{
    uint8_t i;
    uint8_t Tmp, Tm, t;
    for (i = 0; i < 4; ++i) {
        t = (*state)[i][0];
        Tmp = (*state)[i][0] ^ (*state)[i][1] ^ (*state)[i][2] ^ (*state)[i][3];
        Tm = (*state)[i][0] ^ (*state)[i][1];
        Tm = xtime(Tm);
        (*state)[i][0] ^= Tm ^ Tmp;
        Tm = (*state)[i][1] ^ (*state)[i][2];
        Tm = xtime(Tm);
        (*state)[i][1] ^= Tm ^ Tmp;
        Tm = (*state)[i][2] ^ (*state)[i][3];
        Tm = xtime(Tm);
        (*state)[i][2] ^= Tm ^ Tmp;
        Tm = (*state)[i][3] ^ t;
        Tm = xtime(Tm);
        (*state)[i][3] ^= Tm ^ Tmp;
    }
}

#if MULTIPLY_AS_A_FUNCTION
static uint8_t Multiply(uint8_t x, uint8_t y)
{
    return (((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)))))); /* this last call to xtime() can be omitted */
}
#else
#define Multiply(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))))))   \

#endif

#if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)

#define getSBoxInvert(num) (rsbox[(num)])

static void InvMixColumns(state_t * state)
{
    int i;
    uint8_t a, b, c, d;
    for (i = 0; i < 4; ++i) {
        a = (*state)[i][0];
        b = (*state)[i][1];
        c = (*state)[i][2];
        d = (*state)[i][3];

        (*state)[i][0] = Multiply(a, 0x0e) ^ Multiply(b, 0x0b) ^ Multiply(c, 0x0d) ^ Multiply(d, 0x09);
        (*state)[i][1] = Multiply(a, 0x09) ^ Multiply(b, 0x0e) ^ Multiply(c, 0x0b) ^ Multiply(d, 0x0d);
        (*state)[i][2] = Multiply(a, 0x0d) ^ Multiply(b, 0x09) ^ Multiply(c, 0x0e) ^ Multiply(d, 0x0b);
        (*state)[i][3] = Multiply(a, 0x0b) ^ Multiply(b, 0x0d) ^ Multiply(c, 0x09) ^ Multiply(d, 0x0e);
    }
}

static void InvSubBytes(state_t * state)
{
    uint8_t i, j;
    for (i = 0; i < 4; ++i) {
        for (j = 0; j < 4; ++j) {
            (*state)[j][i] = getSBoxInvert((*state)[j][i]);
        }
    }
}

static void InvShiftRows(state_t * state)
{
    uint8_t temp;

    temp = (*state)[3][1];
    (*state)[3][1] = (*state)[2][1];
    (*state)[2][1] = (*state)[1][1];
    (*state)[1][1] = (*state)[0][1];
    (*state)[0][1] = temp;

    temp = (*state)[0][2];
    (*state)[0][2] = (*state)[2][2];
    (*state)[2][2] = temp;

    temp = (*state)[1][2];
    (*state)[1][2] = (*state)[3][2];
    (*state)[3][2] = temp;

    temp = (*state)[0][3];
    (*state)[0][3] = (*state)[1][3];
    (*state)[1][3] = (*state)[2][3];
    (*state)[2][3] = (*state)[3][3];
    (*state)[3][3] = temp;
}
#endif // #if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)

static void Cipher(state_t * state, const uint8_t * RoundKey)
{
    uint8_t round = 0;

    AddRoundKey(0, state, RoundKey);

    for (round = 1;; ++round) {
        SubBytes(state);
        ShiftRows(state);
        if (round == Nr) {
            break;
        }
        MixColumns(state);
        AddRoundKey(round, state, RoundKey);
    }
    AddRoundKey(Nr, state, RoundKey);
}

#if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)
static void InvCipher(state_t * state, const uint8_t * RoundKey)
{
    uint8_t round = 0;

    AddRoundKey(Nr, state, RoundKey);

    for (round = (Nr - 1);; --round) {
        InvShiftRows(state);
        InvSubBytes(state);
        AddRoundKey(round, state, RoundKey);
        if (round == 0) {
            break;
        }
        InvMixColumns(state);
    }

}
#endif // #if (defined(CBC) && CBC == 1) || (defined(ECB) && ECB == 1)

#if defined(ECB) && (ECB == 1)

void AES_ECB_encrypt(const struct AES_ctx *ctx, uint8_t * buf)
{
    Cipher((state_t *) buf, ctx->RoundKey);
}

void AES_ECB_decrypt(const struct AES_ctx *ctx, uint8_t * buf)
{
    // The next function call decrypts the PlainText with the Key using AES algorithm.
    InvCipher((state_t *) buf, ctx->RoundKey);
}

#endif // #if defined(ECB) && (ECB == 1)

#if defined(CBC) && (CBC == 1)

static void XorWithIv(uint8_t * buf, const uint8_t * Iv)
{
    uint8_t i;
    for (i = 0; i < AES_BLOCKLEN; ++i) // The block in AES is always 128bit no matter the key size
    {
        buf[i] ^= Iv[i];
    }
}

void AES_CBC_encrypt_buffer(struct AES_ctx *ctx, uint8_t * buf, size_t length)
{
    size_t i;
    uint8_t *Iv = ctx->Iv;
    for (i = 0; i < length; i += AES_BLOCKLEN) {
        XorWithIv(buf, Iv);
        Cipher((state_t *) buf, ctx->RoundKey);
        Iv = buf;
        buf += AES_BLOCKLEN;
    }
    /* store Iv in ctx for next call */
    memcpy(ctx->Iv, Iv, AES_BLOCKLEN);
}

void AES_CBC_decrypt_buffer(struct AES_ctx *ctx, uint8_t * buf, size_t length)
{
    size_t i;
    uint8_t storeNextIv[AES_BLOCKLEN];
    for (i = 0; i < length; i += AES_BLOCKLEN) {
        memcpy(storeNextIv, buf, AES_BLOCKLEN);
        InvCipher((state_t *) buf, ctx->RoundKey);
        XorWithIv(buf, ctx->Iv);
        memcpy(ctx->Iv, storeNextIv, AES_BLOCKLEN);
        buf += AES_BLOCKLEN;
    }

}

#endif // #if defined(CBC) && (CBC == 1)

#if defined(CTR) && (CTR == 1)

void AES_CTR_xcrypt_buffer(struct AES_ctx *ctx, uint8_t * buf, size_t length)
{
    uint8_t buffer[AES_BLOCKLEN];

    size_t i;
    int bi;
    for (i = 0, bi = AES_BLOCKLEN; i < length; ++i, ++bi) {
        if (bi == AES_BLOCKLEN) { /* we need to regen xor compliment in buffer */
            memcpy(buffer, ctx->Iv, AES_BLOCKLEN);
            Cipher((state_t *) buffer, ctx->RoundKey);

            /* Increment Iv and handle overflow */
            for (bi = (AES_BLOCKLEN - 1); bi >= 0; --bi) {
                /* inc will overflow */
                if (ctx->Iv[bi] == 255) {
                    ctx->Iv[bi] = 0;
                    continue;
                }
                ctx->Iv[bi] += 1;
                break;
            }
            bi = 0;
        }

        buf[i] = (buf[i] ^ buffer[bi]);
    }
}

#endif // #if defined(CTR) && (CTR == 1)

static int oneHexChar2Hex(char hex)
{
    int outHex = 0;
    if (isdigit(hex)) {
        outHex = hex - '0';
    } else if (isupper(hex)) {
        outHex = hex - 'A' + 10;
    } else {
        outHex = hex - 'a' + 10;
    }
    return outHex;
}

static int HexString2Hex(char *inHexString, char *outHex, int count)
{
   int ret = -1;
   int len = 0;
   int i;
   char ch1, ch2;
   if (NULL == inHexString)
       return -1;
   len = count;
   if (len < 1)
       return -1;
   len &= ~1;
   for (i = 0; i < len; i += 2) {
       ch1 = inHexString[i];
       ch2 = inHexString[i + 1];
       outHex[i / 2 + 1] = 0;
       if (isxdigit(ch1) && isxdigit(ch2)) {
           ch1 = oneHexChar2Hex(ch1);
           ch2 = oneHexChar2Hex(ch2);
           outHex[i / 2] = (ch1 << 4) | ch2;
       } else {
           goto EXIT;
       }
   }
   return 0;
EXIT:
   return ret;
}

static int is_Resolver(char *shll_text, char *shbin)
{
    char *p, *p1;
    char temp[270];

    p = strstr(shll_text, "\n");
    memcpy(shbin, shll_text, p - shll_text);


    if (0 == strncmp(shbin, "#!", 2))
    {
        p1 = strchr(shbin, '/');
        strcpy(shbin, p1);
    }
    else if (0 == strncmp(shbin, ":", 1))
    {
        strcpy(shbin, getenv("SHELL"));
    }
    else
    {
        printf("unknown shell!\n");
        return -1;
    }

    memset(temp, 0, 270);
    strcpy(temp, "which ");
    strcat(temp, shbin);
    strcat(temp, " 1> /dev/null");
    if (0 != system(temp))              // 不存在解析器
    {
        printf("not found shell!\n");
        return -1;
    }
    return 0;
}


void reverse_string(char *str, int len)
{
    char *p1;
    char *p2;

    p1 = str;
    p2 = str + len - 1;          //p2指向字符串尾地址
    if (str == NULL) {
        printf("Null pointer error!");
        return;
    }
    while (p1 < p2)             //当p1地址小于p2地址时执行循环
    {
        char c = *p1;
        *p1 = *p2;              //完成指针指向地址的值的交换
        *p2 = c;
        p1++;                   //交换完毕后p1指针指向下一个字符地址
        p2--;                   //交换完毕后p2指针指向上一个字符地址
    }

}

#define BUFFER_SIZE 270

int main(int argc, char *argv[])
{
    char *argvs[BUFFER_SIZE];
    int l=1;
    int i=4;
    //static uint8_t key[16] = "aixiao.me";
    struct AES_ctx ctx;
    uint8_t *Hex_string = (uint8_t *) malloc(encrypted_text_len*2);
    char *shbin = NULL;

    reverse_string((char *)Encrypted_data, encrypted_text_len*2);
    memset(Hex_string, 0, encrypted_text_len*2);


    AES_init_ctx(&ctx, key);
    HexString2Hex((char *)Encrypted_data, (char *)Hex_string, sizeof(Encrypted_data));
    AES_ECB_decrypt(&ctx, Hex_string);
    //printf("%s\n", Hex_string);


    shbin = (char *) malloc(BUFFER_SIZE);
    memset(shbin, 0, BUFFER_SIZE);
    if (-1 == is_Resolver((char *)Hex_string, shbin))
    {
        goto EXIT;
    }
    //printf("%s\n", shbin);

    argvs[0] = argv[0];
    argvs[1] = "-c";
    argvs[2] = (char *)Hex_string;
    //argvs[3] = argv[0];

    for(i=3; i<=argc-1+3; i++)
    {
        argvs[i] = argv[l];
        l++;
    }
    /*
    for (int i=0; i<=argc-1+3; i++)
    {
        printf("%s", argvs[i]);
    }
    
    */

    execvp(shbin, argvs);


EXIT:
    free(Hex_string);
    free(shbin);

    return 0;
}
