PHP AES加密學習劄記

PHP AES加密學習筆記

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';      printf("128-bit encrypted result:\n%s\n\n",bin2hex($cipherText));      echo '
';echo '
';  }  //--------第一種AES加密方案--------  ?> 

轉載來源：http://www.chilkatsoft.com/p/php_aes.asphttp://www.cnblogs.com/adylee/archive/2007/09/14/893438.html轉載來源：http://blog.csdn.net/shushengsky/archive/2009/12/13/4961861.aspx

';  $key = '1234567890123456';  $content = 'hello';  $padkey = pad2Length($key,16);  $cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');  $iv_size = mcrypt_enc_get_iv_size($cipher);  $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND); #IV自動產生？  echo '自動產生iv的長度:'.strlen($iv).'位:'.bin2hex($iv).'
';  if (mcrypt_generic_init($cipher, pad2Length($key,16), $iv) != -1)  {      // PHP pads with NULL bytes if $content is not a multiple of the block size..      $cipherText = mcrypt_generic($cipher,pad2Length($content,16) );      mcrypt_generic_deinit($cipher);      mcrypt_module_close($cipher);           // Display the result in hex.      printf("128-bit encrypted result:\n%s\n\n",bin2hex($cipherText));      print("
");       }  //解密  $mw = bin2hex($cipherText);  $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');  if (mcrypt_generic_init($td, $padkey, $iv) != -1)  {      $p_t = mdecrypt_generic($td, hexToStr($mw));      mcrypt_generic_deinit($td);      mcrypt_module_close($td);           $p_t = trimEnd($p_t);      echo '解密:';      print($p_t);      print("
");      print(bin2hex($p_t));      echo '

';  }  //將$text補足$padlen倍數的長度  function pad2Length($text, $padlen){      $len = strlen($text)%$padlen;      $res = $text;      $span = $padlen-$len;      for($i=0; $i<$span; $i++){          $res .= chr($span);      }      return $res;  }  //將解密後多餘的長度去掉(因為在加密的時候 補充長度滿足block_size的長度)  function trimEnd($text){      $len = strlen($text);      $c = $text[$len-1];      if(ord($c) <$len){          for($i=$len-ord($c); $i<$len; $i++){              if($text[$i] != $c){                  return $text;              }          }          return substr($text, 0, $len-ord($c));      }      return $text;  }  //16進位的轉為2進位字串  function hexToStr($hex)   {       $bin="";       for($i=0; $i
';  $key = '1234567890123456';  $key = pad2Length($key,16);  $iv = 'asdff';  $content = 'hello';  $content = pad2Length($content,16);  $AESed =  bin2hex( mcrypt_encrypt(MCRYPT_RIJNDAEL_128,$key,$content,MCRYPT_MODE_ECB,$iv) ); #加密  echo "128-bit encrypted result:".$AESed.'
';  $jiemi = mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$key,hexToStr($AESed),MCRYPT_MODE_ECB,$iv); #解密  echo '解密:';  echo trimEnd($jiemi);  //--------第三種AES加密方案--------  ?>#KEY長度無限制，IV長度必須是block_size的倍數#如果是MCRYPT_MODE_ECB加密，結果與KEY有關，與IV無關#如果是MCRYPT_MODE_CBC加密，結果與KEY有關，與IV有關
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