C/C++ VS PHP AES128_ECB_PKCS5Padding

資料來源: https://github.com/HUTOYP/AES128_ECB_PKCS5Padding

https://blog.51cto.com/laok8/1909479

https://github.com/yekq/Android_JNI_AES_128_ECB_PKCS5Padding

https://github.com/shoneworn/JNI_AES-ECB-PKCS5Padding

GITHUB: https://github.com/jash-git/Jash-good-idea-20220101-001/tree/main/C%20VS%20PHP%20AES128_ECB_PKCS5Padding

實測可以正確結果:

Security::encrypt:IDcqXMG9R6tp5Vqi1RO92A==
Security::decrypt:example

------

Hello world!
IDcqXMG9R6tp5Vqi1RO92A==,24
7,example

Process returned 0 (0x0)   execution time : 0.014 s
Press any key to continue.

PHP

<?php
class Security {
	public static function encrypt($input, $key) {
	$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
	$input = Security::pkcs5_pad($input, $size);
	$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
	$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
	mcrypt_generic_init($td, $key, $iv);
	$data = mcrypt_generic($td, $input);
	mcrypt_generic_deinit($td);
	mcrypt_module_close($td);
	$data = base64_encode($data);
	return $data;
	}
 
	private static function pkcs5_pad ($text, $blocksize) {
		$pad = $blocksize - (strlen($text) % $blocksize);
		return $text . str_repeat(chr($pad), $pad);
	}
 
	public static function decrypt($sStr, $sKey) {
		$decrypted= mcrypt_decrypt(
		MCRYPT_RIJNDAEL_128,
		$sKey,
		base64_decode($sStr),
		MCRYPT_MODE_ECB
	);

		$dec_s = strlen($decrypted);
		$padding = ord($decrypted[$dec_s-1]);
		$decrypted = substr($decrypted, 0, -$padding);
		return $decrypted;
	}	
}
 
 
 
$key = "1234567891234567";
$data = "example";
 
$value = Security::encrypt($data , $key );
echo "Security::encrypt:".$value.'<br/>';
echo "Security::decrypt:".Security::decrypt($value, $key );
?>

C – aes.c

/*
This is an implementation of the AES128 algorithm, specifically ECB and CBC mode.
The implementation is verified against the test vectors in:
  National Institute of Standards and Technology Special Publication 800-38A 2001 ED
ECB-AES128
----------
  plain-text:
    6bc1bee22e409f96e93d7e117393172a
    ae2d8a571e03ac9c9eb76fac45af8e51
    30c81c46a35ce411e5fbc1191a0a52ef
    f69f2445df4f9b17ad2b417be66c3710
  key:
    2b7e151628aed2a6abf7158809cf4f3c
  resulting cipher
    3ad77bb40d7a3660a89ecaf32466ef97
    f5d3d58503b9699de785895a96fdbaaf
    43b1cd7f598ece23881b00e3ed030688
    7b0c785e27e8ad3f8223207104725dd4
NOTE:   String length must be evenly divisible by 16byte (str_len % 16 == 0)
        You should pad the end of the string with zeros if this is not the case.
*/


/*****************************************************************************/
/* Includes:                                                                 */
/*****************************************************************************/

#include "aes.h"

#define JNI_TRUE 1
#define JNI_FALSE 0

/*****************************************************************************/
/* Defines:                                                                  */
/*****************************************************************************/
// The number of columns comprising a state in AES. This is a constant in AES. Value=4
#define Nb 4
// The number of 32 bit words in a key.
#define Nk 4
// Key length in bytes [128 bit]
#define KEYLEN 16
// The number of rounds in AES Cipher.
#define Nr 10

// jcallan@github points out that declaring Multiply as a function
// reduces code size considerably with the Keil ARM compiler.
// See this link for more information: https://github.com/kokke/tiny-AES128-C/pull/3
#ifndef MULTIPLY_AS_A_FUNCTION
  #define MULTIPLY_AS_A_FUNCTION 0
#endif


/*****************************************************************************/
/* Private variables:                                                        */
/*****************************************************************************/
// state - array holding the intermediate results during decryption.
typedef uint8_t state_t[4][4];
static state_t* state;

// The array that stores the round keys.
static uint8_t RoundKey[176];

// The Key input to the AES Program
static const uint8_t* Key;
#if defined(CBC) && CBC
  // Initial Vector used only for CBC mode
  static uint8_t* Iv;
#endif

// The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
// The numbers below can be computed dynamically trading ROM for RAM -
// This can be useful in (embedded) bootloader applications, where ROM is often limited.
static const uint8_t sbox[256] =   {
  //0     1    2      3     4    5     6     7      8    9     A      B    C     D     E     F
  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 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 };


// The round constant word array, Rcon[i], contains the values given by
// x to th e power (i-1) being powers of x (x is denoted as {02}) in the field GF(2^8)
// Note that i starts at 1, not 0).
static const uint8_t Rcon[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  };


/*****************************************************************************/
/* Private functions:                                                        */
/*****************************************************************************/
static uint8_t getSBoxValue(uint8_t num)
{
  return sbox[num];
}

static uint8_t getSBoxInvert(uint8_t num)
{
  return rsbox[num];
}

// This function produces Nb(Nr+1) round keys. The round keys are used in each round to decrypt the states.
static void KeyExpansion(void)
{
  uint32_t i, j, k;
  uint8_t tempa[4]; // Used for the column/row operations

  // The first round key is the key itself.
  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];
  }

  // All other round keys are found from the previous round keys.
  for(; (i < (Nb * (Nr + 1))); ++i)
  {
    for(j = 0; j < 4; ++j)
    {
      tempa[j]=RoundKey[(i-1) * 4 + j];
    }
    if (i % Nk == 0)
    {
      // This function rotates the 4 bytes in a word to the left once.
      // [a0,a1,a2,a3] becomes [a1,a2,a3,a0]

      // Function RotWord()
      {
        k = tempa[0];
        tempa[0] = tempa[1];
        tempa[1] = tempa[2];
        tempa[2] = tempa[3];
        tempa[3] = k;
      }

      // SubWord() is a function that takes a four-byte input word and
      // applies the S-box to each of the four bytes to produce an output word.

      // Function Subword()
      {
        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];
    }
    else if (Nk > 6 && i % Nk == 4)
    {
      // Function Subword()
      {
        tempa[0] = getSBoxValue(tempa[0]);
        tempa[1] = getSBoxValue(tempa[1]);
        tempa[2] = getSBoxValue(tempa[2]);
        tempa[3] = getSBoxValue(tempa[3]);
      }
    }
    RoundKey[i * 4 + 0] = RoundKey[(i - Nk) * 4 + 0] ^ tempa[0];
    RoundKey[i * 4 + 1] = RoundKey[(i - Nk) * 4 + 1] ^ tempa[1];
    RoundKey[i * 4 + 2] = RoundKey[(i - Nk) * 4 + 2] ^ tempa[2];
    RoundKey[i * 4 + 3] = RoundKey[(i - Nk) * 4 + 3] ^ tempa[3];
  }
}

// This function adds the round key to state.
// The round key is added to the state by an XOR function.
static void AddRoundKey(uint8_t round)
{
  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];
    }
  }
}

// The SubBytes Function Substitutes the values in the
// state matrix with values in an S-box.
static void SubBytes(void)
{
  uint8_t i, j;
  for(i = 0; i < 4; ++i)
  {
    for(j = 0; j < 4; ++j)
    {
      (*state)[j][i] = getSBoxValue((*state)[j][i]);
    }
  }
}

// The ShiftRows() function shifts the rows in the state to the left.
// Each row is shifted with different offset.
// Offset = Row number. So the first row is not shifted.
static void ShiftRows(void)
{
  uint8_t temp;

  // Rotate first row 1 columns to left
  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;

  // Rotate second row 2 columns to left
  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;

  // Rotate third row 3 columns to left
  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));
}

// MixColumns function mixes the columns of the state matrix
static void MixColumns(void)
{
  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 ;
  }
}

// Multiply is used to multiply numbers in the field GF(2^8)
#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))))));
  }
#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

// MixColumns function mixes the columns of the state matrix.
// The method used to multiply may be difficult to understand for the inexperienced.
// Please use the references to gain more information.
static void InvMixColumns(void)
{
  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);
  }
}


// The SubBytes Function Substitutes the values in the
// state matrix with values in an S-box.
static void InvSubBytes(void)
{
  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(void)
{
  uint8_t temp;

  // Rotate first row 1 columns to right
  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;

  // Rotate second row 2 columns to right
  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;

  // Rotate third row 3 columns to right
  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;
}


// Cipher is the main function that encrypts the PlainText.
static void Cipher(void)
{
  uint8_t round = 0;

  // Add the First round key to the state before starting the rounds.
  AddRoundKey(0);

  // There will be Nr rounds.
  // The first Nr-1 rounds are identical.
  // These Nr-1 rounds are executed in the loop below.
  for(round = 1; round < Nr; ++round)
  {
    SubBytes();
    ShiftRows();
    MixColumns();
    AddRoundKey(round);
  }

  // The last round is given below.
  // The MixColumns function is not here in the last round.
  SubBytes();
  ShiftRows();
  AddRoundKey(Nr);
}

static void InvCipher(void)
{
  uint8_t round=0;

  // Add the First round key to the state before starting the rounds.
  AddRoundKey(Nr);

  // There will be Nr rounds.
  // The first Nr-1 rounds are identical.
  // These Nr-1 rounds are executed in the loop below.
  for(round=Nr-1;round>0;round--)
  {
    InvShiftRows();
    InvSubBytes();
    AddRoundKey(round);
    InvMixColumns();
  }

  // The last round is given below.
  // The MixColumns function is not here in the last round.
  InvShiftRows();
  InvSubBytes();
  AddRoundKey(0);
}

static void BlockCopy(uint8_t* output, uint8_t* input)
{
  uint8_t i;
  for (i=0;i<KEYLEN;++i)
  {
    output[i] = input[i];
  }
}



/*****************************************************************************/
/* Public functions:                                                         */
/*****************************************************************************/
#if defined(ECB) && ECB


void AES128_ECB_encrypt(uint8_t* input, const uint8_t* key, uint8_t* output)
{
  // Copy input to output, and work in-memory on output
  BlockCopy(output, input);
  state = (state_t*)output;

  Key = key;
  KeyExpansion();

  // The next function call encrypts the PlainText with the Key using AES algorithm.
  Cipher();
}

void AES128_ECB_decrypt(uint8_t* input, const uint8_t* key, uint8_t *output)
{
  // Copy input to output, and work in-memory on output
  BlockCopy(output, input);
  state = (state_t*)output;

  // The KeyExpansion routine must be called before encryption.
  Key = key;
  KeyExpansion();

  InvCipher();
}

/**
 * 不定长加密,pkcs5padding
 */
char* AES_128_ECB_PKCS5Padding_Encrypt(const char *in, const uint8_t *key)
{

  int inLength= (int) strlen(in);//输入的长度
  int remainder = inLength % 16;
  uint8_t *paddingInput;
  int paddingInputLengt=0;
  int group = inLength / 16;
  int size = 16 * (group + 1);
  paddingInput=(uint8_t*)malloc(size);
  paddingInputLengt=size;

  int dif = size - inLength;
  int i;
  for (i = 0; i < size; i++) {
    if (i < inLength) {
      paddingInput[i] = in[i];
    } else {
      if (remainder == 0) {
        //刚好是16倍数,就填充16个16
        paddingInput[i] = HEX[0];
      } else {	//如果不足16位 少多少位就补几个几  如：少4为就补4个4 以此类推
        paddingInput[i] = HEX[dif];
      }
    }
  }

  int count=paddingInputLengt / 16;
  //开始分段加密
  char * out=(char*)malloc(paddingInputLengt);
  for ( i = 0; i < count; ++i) {
    AES128_ECB_encrypt(paddingInput+i*16, key, out+i*16);
  }
  char * base64En=b64_encode(out,paddingInputLengt);
  //LOGE(base64En);
  free(paddingInput);
  free(out);
  return base64En;
}



/**
 * 不定长解密,pkcs5padding
 */
char * AES_128_ECB_PKCS5Padding_Decrypt(const char *in, const uint8_t* key)
{
    //加密前:1
    //key:1234567890abcdef
    //加密后:qkrxxA9fIF636aITDRJhcg==

//    in="m74nCuZkzK13anBQRDWeOw==";//123456
//    in="qkrxxA9fIF636aITDRJhcg==";//1
//    in="LuD5WoRRcHq1tuEWZQHLHwLexWUsAhX5OvafAJ8PbVg=";//abcdefghijklmnop
//    in="+R99oRBuckos5mdUqQHHeoja4/HYqWtqTM3cgl+E0a3p5i7DoLeBpq/mVUfuEh5D1VRn4Wt4TzHazvz931WfiA==";//57yW56CB5Y6f55CGOuWwhjPkuKrlrZfoioLovazmjaLmiJA05Liq5a2X6IqC
//    in="UUNc8Dh0OVZE9UyzJwWTSVkt3hgIxg0nfVHpSirRL3T1meUZDRUINWvoYfkcOEpL";//编码原理:将3个字节转换成4个字节
//    in="Yrl8Sryq7Kpce4UWRfG3bBBYpzXv59Muj0wjkJYRHFb73CogeDRfQCXsjSfxTe0gibaf+f1FLekwow0f1W9stJy3q7CNOPzkSJVdCtyZvIxMxLwz9hyatUJnU4Nq6i2gkaiCZcwHuDtrAHpEoy1k0vudpWhGu2457iSc40Tqw4tQnxKX18DcKNG5/KPUM+A5Y9a3FxaAy84Turio78b+6A==";//{"Json解析":"支持格式化高亮折叠","支持XML转换":"支持XML转换Json,Json转XML","Json格式验证":"更详细准确的错误信息"}
    //LOGE("输入:");
    //LOGE(in);
    uint8_t *inputDesBase64=b64_decode(in,strlen(in));
    const size_t inputLength= (strlen(in) / 4) * 3;
    uint8_t *out=malloc(inputLength);
    memset(out,0,inputLength);
    size_t count=inputLength/16;
    if (count<=0)
    {
        count=1;
    }
    size_t i;
    for ( i = 0; i < count; ++i) {
        AES128_ECB_decrypt(inputDesBase64+i*16,key,out+i*16);
    }


    //去除结尾垃圾字符串 begin
    int index = findPaddingIndex(out);
    if(index==NULL)
    {
        return (char*)out;
    }
    if(index < strlen(out)){//  if (index>strlen)  will crash.
        memset(out+index, '\0', strlen(out)-index);
    }
    //去除结尾垃圾字符串 end


    //LOGE("解密结果:");
    //LOGE(out);
    free(inputDesBase64);
    return (char *) out;
}

/**
 * 查找结果中的一些 多余字符串
 * @param   str         ：   加密结果原文
 * @return  int         ：   垃圾字符串的开始位置
 */
int findPaddingIndex(uint8_t * str)
{
  return (int)(strlen(str) - str[strlen(str) - 1]);
}


/**
 *
 * 这里干掉了CBC 相关代码 ，这块代码是一个AES的一个带有向量的算法
 * 找寻这些代码 请移步 https://github.com/kokke/tiny-AES128-C
#if defined(CBC) && CBC
#endif // #if defined(CBC) && CBC
*/

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

C – aes.h

#ifndef AES_H_INCLUDED
#define AES_H_INCLUDED

//#include <android/log.h>
//#include <jni.h>
#include <stdlib.h>
#include <stdint.h>
#include "base64.h"

// #define the macros below to 1/0 to enable/disable the mode of operation.
//
// CBC enables AES128 encryption in CBC-mode of operation and handles 0-padding.
// ECB enables the basic ECB 16-byte block algorithm. Both can be enabled simultaneously.

// The #ifndef-guard allows it to be configured before #include'ing or at compile time.
#ifndef CBC
  #define CBC 1
#endif

#ifndef ECB
  #define ECB 1
#endif

static const unsigned  char HEX[16]={0x10,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f};

//__attribute__((section (".mytext")))
//static const uint8_t AES_KEY[]="1234567890abcdef";


#if defined(ECB) && ECB

void AES128_ECB_encrypt(uint8_t* input, const uint8_t* key, uint8_t *output);
void AES128_ECB_decrypt(uint8_t* input, const uint8_t* key, uint8_t *output);

char* AES_128_ECB_PKCS5Padding_Encrypt(const char *in,const uint8_t *key);
char* AES_128_ECB_PKCS5Padding_Decrypt(const char *in, const uint8_t* key);

int findPaddingIndex(uint8_t * str);
#endif // #if defined(ECB) && ECB


/*
 * CBC是向量模式  暂不采用
 如果需要使用 ，请移步 https://github.com/kokke/tiny-AES128-C

#if defined(CBC) && CBC
#endif // #if defined(CBC) && CBC
*/

#endif // AES_H_INCLUDED

C – base64.c

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "base64.h"



char *
b64_encode (const unsigned char *src, size_t len) {
  int i = 0;
  int j = 0;
  char *enc = NULL;
  size_t size = 0;
  unsigned char buf[4];
  unsigned char tmp[3];

  // alloc
  enc = (char *) malloc(0);
  if (NULL == enc) { return NULL; }

  // parse until end of source
  while (len--) {
    // read up to 3 bytes at a time into `tmp'
    tmp[i++] = *(src++);

    // if 3 bytes read then encode into `buf'
    if (3 == i) {
      buf[0] = (tmp[0] & 0xfc) >> 2;
      buf[1] = ((tmp[0] & 0x03) << 4) + ((tmp[1] & 0xf0) >> 4);
      buf[2] = ((tmp[1] & 0x0f) << 2) + ((tmp[2] & 0xc0) >> 6);
      buf[3] = tmp[2] & 0x3f;

      // allocate 4 new byts for `enc` and
      // then translate each encoded buffer
      // part by index from the base 64 index table
      // into `enc' unsigned char array
      enc = (char *) realloc(enc, size + 4);
      for (i = 0; i < 4; ++i) {
        enc[size++] = b64_table[buf[i]];
      }

      // reset index
      i = 0;
    }
  }

  // remainder
  if (i > 0) {
    // fill `tmp' with `\0' at most 3 times
    for (j = i; j < 3; ++j) {
      tmp[j] = '\0';
    }

    // perform same codec as above
    buf[0] = (tmp[0] & 0xfc) >> 2;
    buf[1] = ((tmp[0] & 0x03) << 4) + ((tmp[1] & 0xf0) >> 4);
    buf[2] = ((tmp[1] & 0x0f) << 2) + ((tmp[2] & 0xc0) >> 6);
    buf[3] = tmp[2] & 0x3f;

    // perform same write to `enc` with new allocation
    for (j = 0; (j < i + 1); ++j) {
      enc = (char *) realloc(enc, size + 1);
      enc[size++] = b64_table[buf[j]];
    }

    // while there is still a remainder
    // append `=' to `enc'
    while ((i++ < 3)) {
      enc = (char *) realloc(enc, size + 1);
      enc[size++] = '=';
    }
  }

  // Make sure we have enough space to add '\0' character at end.
  enc = (char *) realloc(enc, size + 1);
  enc[size] = '\0';

  return enc;
}


unsigned char *
b64_decode(const char *src, size_t len) {
  return b64_decode_ex(src, len, NULL);
}

unsigned char *
b64_decode_ex(const char *src, size_t len, size_t *decsize) {
  int i = 0;
  int j = 0;
  int l = 0;
  size_t size = 0;
  unsigned char *dec = NULL;
  unsigned char buf[3];
  unsigned char tmp[4];

  // alloc
  dec = (unsigned char *) malloc(0);
  if (NULL == dec) { return NULL; }

  // parse until end of source
  while (len--) {
    // break if char is `=' or not base64 char
    if ('=' == src[j]) { break; }
    if (!(isalnum(src[j]) || '+' == src[j] || '/' == src[j])) { break; }

    // read up to 4 bytes at a time into `tmp'
    tmp[i++] = src[j++];

    // if 4 bytes read then decode into `buf'
    if (4 == i) {
      // translate values in `tmp' from table
      for (i = 0; i < 4; ++i) {
        // find translation char in `b64_table'
        for (l = 0; l < 64; ++l) {
          if (tmp[i] == b64_table[l]) {
            tmp[i] = l;
            break;
          }
        }
      }

      // decode
      buf[0] = (tmp[0] << 2) + ((tmp[1] & 0x30) >> 4);
      buf[1] = ((tmp[1] & 0xf) << 4) + ((tmp[2] & 0x3c) >> 2);
      buf[2] = ((tmp[2] & 0x3) << 6) + tmp[3];

      // write decoded buffer to `dec'
      dec = (unsigned char *) realloc(dec, size + 3);
      for (i = 0; i < 3; ++i) {
        dec[size++] = buf[i];
      }

      // reset
      i = 0;
    }
  }

  // remainder
  if (i > 0) {
    // fill `tmp' with `\0' at most 4 times
    for (j = i; j < 4; ++j) {
      tmp[j] = '\0';
    }

    // translate remainder
    for (j = 0; j < 4; ++j) {
      // find translation char in `b64_table'
      for (l = 0; l < 64; ++l) {
        if (tmp[j] == b64_table[l]) {
          tmp[j] = l;
          break;
        }
      }
    }

    // decode remainder
    buf[0] = (tmp[0] << 2) + ((tmp[1] & 0x30) >> 4);
    buf[1] = ((tmp[1] & 0xf) << 4) + ((tmp[2] & 0x3c) >> 2);
    buf[2] = ((tmp[2] & 0x3) << 6) + tmp[3];

    // write remainer decoded buffer to `dec'
    dec = (unsigned char *) realloc(dec, size + (i - 1));
    for (j = 0; (j < i - 1); ++j) {
      dec[size++] = buf[j];
    }
  }

  // Make sure we have enough space to add '\0' character at end.
  dec = (unsigned char *) realloc(dec, size + 1);
  dec[size] = '\0';

  // Return back the size of decoded string if demanded.
  if (decsize != NULL) *decsize = size;

  return dec;
}

C – base64.h

#ifndef BASE64_H_INCLUDED
#define BASE64_H_INCLUDED

/**
 * Base64 index table.
 */

static const char b64_table[] = {
  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
  'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
  'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
  'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
  'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
  'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
  'w', 'x', 'y', 'z', '0', '1', '2', '3',
  '4', '5', '6', '7', '8', '9', '+', '/'
};

/**
 * Encode `unsigned char *' source with `size_t' size.
 * Returns a `char *' base64 encoded string.
 */

char * b64_encode (const unsigned char *, size_t);

/**
 * Dencode `char *' source with `size_t' size.
 * Returns a `unsigned char *' base64 decoded string.
 */
unsigned char * b64_decode (const char *, size_t);

/**
 * Dencode `char *' source with `size_t' size.
 * Returns a `unsigned char *' base64 decoded string + size of decoded string.
 */
unsigned char * b64_decode_ex (const char *, size_t, size_t *);

#endif // BASE64_H_INCLUDED

C – main.c

#include <stdio.h>
#include <stdlib.h>
#include "base64.h"
#include "aes.h"

int main()
{
    printf("Hello world!\n");
    uint8_t AES_KEY[]="1234567891234567";
    char *data = "example";

    char *OutPut01 = AES_128_ECB_PKCS5Padding_Encrypt(data, AES_KEY);
    printf("%s,%d\n",OutPut01,strlen(OutPut01));

    char *data01 = "IDcqXMG9R6tp5Vqi1RO92A==";
    char *OutPut02 = AES_128_ECB_PKCS5Padding_Decrypt(data01,AES_KEY);
    printf("%d,%s\n",strlen(OutPut02),OutPut02);
    return 0;
}