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  • Jquery中文网 南粤风采36选7开奖公告 www.77402m.com
    Jquery中文网 >  脚本编程  >  php  >  正文 PHP AES256加密算法的实现代码

    福建体育36选7开奖结果:PHP AES256加密算法的实现代码

    发布时间:2017-07-31   编辑:南粤风采36选7开奖公告 www.77402m.com
    分享一个php实现的AES256加密算法的例子,挺不错的,并且提供了mcrypt加密与解密的例子,供大家学习参考下。

    南粤风采36选7开奖公告 www.77402m.com 本节内容:
    PHP中AES256加密算法的类。

    1,AES256加密算法类 aes.class.php
     

    复制代码 代码示例:
    <?php 
    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */ 
    /*  AES implementation in PHP (c) Chris Veness 2005-2011. Right of free use is granted for all    */ 
    /*    commercial or non-commercial use under CC-BY licence. No warranty of any form is offered.   */ 
    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */ 
       
    class Aes { 
       
      /**
       * AES Cipher function: encrypt 'input' with Rijndael algorithm
       *
       * @param input message as byte-array (16 bytes)
       * @param w     key schedule as 2D byte-array (Nr+1 x Nb bytes) - 
       *              generated from the cipher key by keyExpansion()
       * @return      ciphertext as byte-array (16 bytes)
       * @edit www.jbxue.com
       */ 
      public static function cipher($input, $w) {    // main cipher function [§5.1] 
        $Nb = 4;                 // block size (in words): no of columns in state (fixed at 4 for AES) 
        $Nr = count($w)/$Nb - 1; // no of rounds: 10/12/14 for 128/192/256-bit keys 
       
        $state = array();  // initialise 4xNb byte-array 'state' with input [§3.4] 
        for ($i=0; $i<4*$Nb; $i++) $state[$i%4][floor($i/4)] = $input[$i]; 
       
        $state = self::addRoundKey($state, $w, 0, $Nb); 
       
        for ($round=1; $round<$Nr; $round++) {  // apply Nr rounds 
          $state = self::subBytes($state, $Nb); 
          $state = self::shiftRows($state, $Nb); 
          $state = self::mixColumns($state, $Nb); 
          $state = self::addRoundKey($state, $w, $round, $Nb); 
        } 
       
        $state = self::subBytes($state, $Nb); 
        $state = self::shiftRows($state, $Nb); 
        $state = self::addRoundKey($state, $w, $Nr, $Nb); 
       
        $output = array(4*$Nb);  // convert state to 1-d array before returning [§3.4] 
        for ($i=0; $i<4*$Nb; $i++) $output[$i] = $state[$i%4][floor($i/4)]; 
        return $output; 
      }
       
      private static function addRoundKey($state, $w, $rnd, $Nb) {  // xor Round Key into state S [§5.1.4] 
        for ($r=0; $r<4; $r++) { 
          for ($c=0; $c<$Nb; $c++) $state[$r][$c] ^= $w[$rnd*4+$c][$r]; 
        } 
        return $state; 
      } 
       
      private static function subBytes($s, $Nb) {    // apply SBox to state S [§5.1.1] 
        for ($r=0; $r<4; $r++) { 
          for ($c=0; $c<$Nb; $c++) $s[$r][$c] = self::$sBox[$s[$r][$c]]; 
        } 
        return $s; 
      } 
       
      private static function shiftRows($s, $Nb) {    // shift row r of state S left by r bytes [§5.1.2] 
        $t = array(4); 
        for ($r=1; $r<4; $r++) { 
          for ($c=0; $c<4; $c++) $t[$c] = $s[$r][($c+$r)%$Nb];  // shift into temp copy 
          for ($c=0; $c<4; $c++) $s[$r][$c] = $t[$c];           // and copy back 
        }          // note that this will work for Nb=4,5,6, but not 7,8 (always 4 for AES): 
        return $s;  // see fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.311.pdf  
      } 
       
      private static function mixColumns($s, $Nb) {   // combine bytes of each col of state S [§5.1.3] 
        for ($c=0; $c<4; $c++) { 
          $a = array(4);  // 'a' is a copy of the current column from 's' 
          $b = array(4);  // 'b' is a?{02} in GF(2^8) 
          for ($i=0; $i<4; $i++) { 
            $a[$i] = $s[$i][$c]; 
            $b[$i] = $s[$i][$c]&0x80 ? $s[$i][$c]<<1 ^ 0x011b : $s[$i][$c]<<1; 
          } 
          // a[n] ^ b[n] is a?{03} in GF(2^8) 
          $s[0][$c] = $b[0] ^ $a[1] ^ $b[1] ^ $a[2] ^ $a[3]; // 2*a0 + 3*a1 + a2 + a3 
          $s[1][$c] = $a[0] ^ $b[1] ^ $a[2] ^ $b[2] ^ $a[3]; // a0 * 2*a1 + 3*a2 + a3 
          $s[2][$c] = $a[0] ^ $a[1] ^ $b[2] ^ $a[3] ^ $b[3]; // a0 + a1 + 2*a2 + 3*a3 
          $s[3][$c] = $a[0] ^ $b[0] ^ $a[1] ^ $a[2] ^ $b[3]; // 3*a0 + a1 + a2 + 2*a3 
        } 
        return $s; 
      } 
       
      /**
       * Key expansion for Rijndael cipher(): performs key expansion on cipher key
       * to generate a key schedule
       *
       * @param key cipher key byte-array (16 bytes)
       * @return    key schedule as 2D byte-array (Nr+1 x Nb bytes)
       */ 
      public static function keyExpansion($key) {  // generate Key Schedule from Cipher Key [§5.2] 
        $Nb = 4;              // block size (in words): no of columns in state (fixed at 4 for AES) 
        $Nk = count($key)/4;  // key length (in words): 4/6/8 for 128/192/256-bit keys 
        $Nr = $Nk + 6;        // no of rounds: 10/12/14 for 128/192/256-bit keys 
       
        $w = array(); 
        $temp = array(); 
       
        for ($i=0; $i<$Nk; $i++) { 
          $r = array($key[4*$i], $key[4*$i+1], $key[4*$i+2], $key[4*$i+3]); 
          $w[$i] = $r; 
        } 
       
        for ($i=$Nk; $i<($Nb*($Nr+1)); $i++) { 
          $w[$i] = array(); 
          for ($t=0; $t<4; $t++) $temp[$t] = $w[$i-1][$t]; 
          if ($i % $Nk == 0) { 
            $temp = self::subWord(self::rotWord($temp)); 
            for ($t=0; $t<4; $t++) $temp[$t] ^= self::$rCon[$i/$Nk][$t]; 
          } else if ($Nk > 6 && $i%$Nk == 4) { 
            $temp = self::subWord($temp); 
          } 
          for ($t=0; $t<4; $t++) $w[$i][$t] = $w[$i-$Nk][$t] ^ $temp[$t]; 
        } 
        return $w; 
      } 
       
      private static function subWord($w) {    // apply SBox to 4-byte word w 
        for ($i=0; $i<4; $i++) $w[$i] = self::$sBox[$w[$i]]; 
        return $w; 
      } 
       
      private static function rotWord($w) {    // rotate 4-byte word w left by one byte 
        $tmp = $w[0]; 
        for ($i=0; $i<3; $i++) $w[$i] = $w[$i+1]; 
        $w[3] = $tmp; 
        return $w; 
      } 
       
      // sBox is pre-computed multiplicative inverse in GF(2^8) used in subBytes and keyExpansion [§5.1.1] 
      private static $sBox = array( 
        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); 
       
      // rCon is Round Constant used for the Key Expansion [1st col is 2^(r-1) in GF(2^8)] [§5.2] 
      private static $rCon = array(  
        array(0x00, 0x00, 0x00, 0x00), 
        array(0x01, 0x00, 0x00, 0x00), 
        array(0x02, 0x00, 0x00, 0x00), 
        array(0x04, 0x00, 0x00, 0x00), 
        array(0x08, 0x00, 0x00, 0x00), 
        array(0x10, 0x00, 0x00, 0x00), 
        array(0x20, 0x00, 0x00, 0x00), 
        array(0x40, 0x00, 0x00, 0x00), 
        array(0x80, 0x00, 0x00, 0x00), 
        array(0x1b, 0x00, 0x00, 0x00), 
        array(0x36, 0x00, 0x00, 0x00) );  
     
    }  
    ?>

    2,aesctr.class.php
     

    复制代码 代码示例:
    <?php 
    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */ 
    /*  AES counter (CTR) mode implementation in PHP (c) Chris Veness 2005-2011. Right of free use is */ 
    /*    granted for all commercial or non-commercial use under CC-BY licence. No warranty of any    */ 
    /*    form is offered.                                                                            */ 
    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  */ 
    class AesCtr extends Aes { 
       
      /** 
       * Encrypt a text using AES encryption in Counter mode of operation
       *  - see //csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
       *
       * Unicode multi-byte character safe
       *
       * @param plaintext source text to be encrypted
       * @param password  the password to use to generate a key
       * @param nBits     number of bits to be used in the key (128, 192, or 256)
       * @param keep      keep 1:each not change 0:each change(default)
       * @return          encrypted text
       */ 
      public static function encrypt($plaintext, $password, $nBits, $keep=0) { 
        $blockSize = 16;  // block size fixed at 16 bytes / 128 bits (Nb=4) for AES 
        if (!($nBits==128 || $nBits==192 || $nBits==256)) return '';  // standard allows 128/192/256 bit keys 
        // note PHP (5) gives us plaintext and password in UTF8 encoding! 
         
        // use AES itself to encrypt password to get cipher key (using plain password as source for   
        // key expansion) - gives us well encrypted key 
        $nBytes = $nBits/8;  // no bytes in key 
        $pwBytes = array(); 
        for ($i=0; $i<$nBytes; $i++) $pwBytes[$i] = ord(substr($password,$i,1)) & 0xff; 
        $key = Aes::cipher($pwBytes, Aes::keyExpansion($pwBytes)); 
        $key = array_merge($key, array_slice($key, 0, $nBytes-16));  // expand key to 16/24/32 bytes long  
       
        // initialise 1st 8 bytes of counter block with nonce (NIST SP800-38A §B.2): [0-1] = millisec,  
        // [2-3] = random, [4-7] = seconds, giving guaranteed sub-ms uniqueness up to Feb 2106 
        $counterBlock = array(); 
     
        if($keep==0){ 
            $nonce = floor(microtime(true)*1000);   // timestamp: milliseconds since 1-Jan-1970 
            $nonceMs = $nonce%1000; 
            $nonceSec = floor($nonce/1000); 
            $nonceRnd = floor(rand(0, 0xffff)); 
        }else{ 
            $nonce = 10000; 
            $nonceMs = $nonce%1000; 
            $nonceSec = floor($nonce/1000); 
            $nonceRnd = 10000; 
        }    
     
        for ($i=0; $i<2; $i++) $counterBlock[$i]   = self::urs($nonceMs,  $i*8) & 0xff; 
        for ($i=0; $i<2; $i++) $counterBlock[$i+2] = self::urs($nonceRnd, $i*8) & 0xff; 
        for ($i=0; $i<4; $i++) $counterBlock[$i+4] = self::urs($nonceSec, $i*8) & 0xff; 
         
        // and convert it to a string to go on the front of the ciphertext 
        $ctrTxt = ''; 
        for ($i=0; $i<8; $i++) $ctrTxt .= chr($counterBlock[$i]); 
       
        // generate key schedule - an expansion of the key into distinct Key Rounds for each round 
        $keySchedule = Aes::keyExpansion($key); 
        //print_r($keySchedule); 
         
        $blockCount = ceil(strlen($plaintext)/$blockSize); 
        $ciphertxt = array();  // ciphertext as array of strings 
         
        for ($b=0; $b<$blockCount; $b++) { 
          // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes) 
          // done in two stages for 32-bit ops: using two words allows us to go past 2^32 blocks (68GB) 
          for ($c=0; $c<4; $c++) $counterBlock[15-$c] = self::urs($b, $c*8) & 0xff; 
          for ($c=0; $c<4; $c++) $counterBlock[15-$c-4] = self::urs($b/0x100000000, $c*8); 
       
          $cipherCntr = Aes::cipher($counterBlock, $keySchedule);  // -- encrypt counter block -- 
       
          // block size is reduced on final block 
          $blockLength = $b<$blockCount-1 ? $blockSize : (strlen($plaintext)-1)%$blockSize+1; 
          $cipherByte = array(); 
           
          for ($i=0; $i<$blockLength; $i++) {  // -- xor plaintext with ciphered counter byte-by-byte -- 
            $cipherByte[$i] = $cipherCntr[$i] ^ ord(substr($plaintext, $b*$blockSize+$i, 1)); 
            $cipherByte[$i] = chr($cipherByte[$i]); 
          } 
          $ciphertxt[$b] = implode('', $cipherByte);  // escape troublesome characters in ciphertext 
        } 
       
        // implode is more efficient than repeated string concatenation 
        $ciphertext = $ctrTxt . implode('', $ciphertxt); 
        $ciphertext = base64_encode($ciphertext); 
        return $ciphertext; 
      }
       
      /** 
       * Decrypt a text encrypted by AES in counter mode of operation
       *
       * @param ciphertext source text to be decrypted
       * @param password   the password to use to generate a key
       * @param nBits      number of bits to be used in the key (128, 192, or 256)
       * @return           decrypted text
       */ 
      public static function decrypt($ciphertext, $password, $nBits) { 
        $blockSize = 16;  // block size fixed at 16 bytes / 128 bits (Nb=4) for AES 
        if (!($nBits==128 || $nBits==192 || $nBits==256)) return '';  // standard allows 128/192/256 bit keys 
        $ciphertext = base64_decode($ciphertext); 
       
        // use AES to encrypt password (mirroring encrypt routine) 
        $nBytes = $nBits/8;  // no bytes in key 
        $pwBytes = array(); 
        for ($i=0; $i<$nBytes; $i++) $pwBytes[$i] = ord(substr($password,$i,1)) & 0xff; 
        $key = Aes::cipher($pwBytes, Aes::keyExpansion($pwBytes)); 
        $key = array_merge($key, array_slice($key, 0, $nBytes-16));  // expand key to 16/24/32 bytes long 
         
        // recover nonce from 1st element of ciphertext 
        $counterBlock = array(); 
        $ctrTxt = substr($ciphertext, 0, 8); 
        for ($i=0; $i<8; $i++) $counterBlock[$i] = ord(substr($ctrTxt,$i,1)); 
         
        // generate key schedule 
        $keySchedule = Aes::keyExpansion($key); 
       
        // separate ciphertext into blocks (skipping past initial 8 bytes) 
        $nBlocks = ceil((strlen($ciphertext)-8) / $blockSize); 
        $ct = array(); 
        for ($b=0; $b<$nBlocks; $b++) $ct[$b] = substr($ciphertext, 8+$b*$blockSize, 16); 
        $ciphertext = $ct;  // ciphertext is now array of block-length strings 
       
        // plaintext will get generated block-by-block into array of block-length strings 
        $plaintxt = array(); 
         
        for ($b=0; $b<$nBlocks; $b++) { 
          // set counter (block #) in last 8 bytes of counter block (leaving nonce in 1st 8 bytes) 
          for ($c=0; $c<4; $c++) $counterBlock[15-$c] = self::urs($b, $c*8) & 0xff; 
          for ($c=0; $c<4; $c++) $counterBlock[15-$c-4] = self::urs(($b+1)/0x100000000-1, $c*8) & 0xff; 
       
          $cipherCntr = Aes::cipher($counterBlock, $keySchedule);  // encrypt counter block 
       
          $plaintxtByte = array(); 
          for ($i=0; $i<strlen($ciphertext[$b]); $i++) { 
            // -- xor plaintext with ciphered counter byte-by-byte -- 
            $plaintxtByte[$i] = $cipherCntr[$i] ^ ord(substr($ciphertext[$b],$i,1)); 
            $plaintxtByte[$i] = chr($plaintxtByte[$i]); 
           
          } 
          $plaintxt[$b] = implode('', $plaintxtByte);  
        } 
       
        // join array of blocks into single plaintext string 
        $plaintext = implode('',$plaintxt); 
         
        return $plaintext; 
      } 
       
       
      /*
       * Unsigned right shift function, since PHP has neither >>> operator nor unsigned ints
       *
       * @param a  number to be shifted (32-bit integer)
       * @param b  number of bits to shift a to the right (0..31)
       * @return   a right-shifted and zero-filled by b bits
       */ 
      private static function urs($a, $b) { 
        $a &= 0xffffffff; $b &= 0x1f;  // (bounds check) 
        if ($a&0x80000000 && $b>0) {   // if left-most bit set 
          $a = ($a>>1) & 0x7fffffff;   //   right-shift one bit & clear left-most bit 
          $a = $a >> ($b-1);           //   remaining right-shifts 
        } else {                       // otherwise 
          $a = ($a>>$b);               //   use normal right-shift 
        }  
        return $a;  
      } 
     
    }   
    ?>

    3,测试实例 demo.php
     

    复制代码 代码示例:
    <?php  
    require 'aes.class.php';     // AES PHP implementation 
    require 'aesctr.class.php';  // AES Counter Mode implementation  
     
    echo 'each change<br>'; 
     
    $mstr = AesCtr::encrypt('Hello World', 'key', 256); 
    echo "Encrypt String : $mstr<br />"; 
     
    $dstr = AesCtr::decrypt($mstr, 'key', 256); 
    echo "Decrypt String : $dstr<br />"; 
     
    echo 'each not change<br>'; 
     
    $mstr = AesCtr::encrypt('Hello World', 'key', 256, 1);  // keep=1 
    echo "Encrypt String : $mstr<br />"; 
     
    $dstr = AesCtr::decrypt($mstr, 'key', 256); 
    echo "Decrypt String : $dstr<br />"; 
    ?>

    附,PHP mcrypt 加密、解密的例子
     

    复制代码 代码示例:
    <?php
    /* aes 256 encrypt
    * @param String $ostr 
    * @param String $securekey
    * @param String $type encrypt, decrypt
    */ 
    function aes($ostr, $securekey, $type='encrypt'){ 
        if($ostr==''){ 
            return ''; 
        } 
         
        $key = $securekey; 
        $iv = strrev($securekey); 
        $td = mcrypt_module_open('rijndael-256', '', 'ofb', ''); 
        mcrypt_generic_init($td, $key, $iv); 
     
        $str = ''; 
     
        switch($type){ 
            case 'encrypt': 
                $str = base64_encode(mcrypt_generic($td, $ostr)); 
                break; 
     
            case 'decrypt': 
                $str = mdecrypt_generic($td, base64_decode($ostr)); 
                break; 
        } 
     
        mcrypt_generic_deinit($td); 
     
        return $str; 

     
    // 测试实例
    $key = "[email protected]#$"; 
    $str = "show me the money"; 
     
    $ostr = aes($str, $key); 
    echo "String 1: $ostr<br />"; 
     
    $dstr = aes($ostr, $key, 'decrypt'); 
    echo "String 2: $dstr<br />"; 

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    关键词: php加密算法   
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