Summary of examples of AES encryption and decryption in php

aesDemo.php:

examples,

<?php
require_once(&#39;./AES.php&#39;);
//$aes = new AES();
$aes = new AES(true);// 把加密后的字符串按十六进制进行存储
//$aes = new AES(true,true);// 带有调试信息且加密字符串按十六进制存储
$key = "this is a 32 byte key";// 密钥
$keys = $aes->makeKey($key);
$encode = "123456";// 被加密的字符串
$ct = $aes->encryptString($encode, $keys);
echo "encode = ".$ct."<br>";
$cpt = $aes->decryptString($ct, $keys);
echo "decode = ".$cpt;
?>

examples, AES encryption class

<?php
//php aes加密类
class AESMcrypt {
public $iv = null;
public $key = null;
public $bit = 128;
private $cipher;
public function __construct($bit, $key, $iv, $mode) {
if(empty($bit) || empty($key) || empty($iv) || empty($mode))
return NULL;
$this->bit = $bit;
$this->key = $key;
$this->iv = $iv;
$this->mode = $mode;
switch($this->bit) {
case 192:$this->cipher = MCRYPT_RIJNDAEL_192; break;
case 256:$this->cipher = MCRYPT_RIJNDAEL_256; break;
default: $this->cipher = MCRYPT_RIJNDAEL_128;
}
switch($this->mode) {
case &#39;ecb&#39;:$this->mode = MCRYPT_MODE_ECB; break;
case &#39;cfb&#39;:$this->mode = MCRYPT_MODE_CFB; break;
case &#39;ofb&#39;:$this->mode = MCRYPT_MODE_OFB; break;
case &#39;nofb&#39;:$this->mode = MCRYPT_MODE_NOFB; break;
default: $this->mode = MCRYPT_MODE_CBC;
}
}
public function encrypt($data) {
$data = base64_encode(mcrypt_encrypt( $this->cipher, $this->key, $data, $this->mode, $this->iv));
return $data;
}
public function decrypt($data) {
$data = mcrypt_decrypt( $this->cipher, $this->key, base64_decode($data), $this->mode, $this->iv);
$data = rtrim(rtrim($data), "..");
return $data;
}
}
//使用方法
$aes = new AESMcrypt($bit = 128, $key = &#39;abcdef1234567890&#39;, $iv = &#39;0987654321fedcba&#39;, $mode = &#39;cbc&#39;);
$c = $aes->encrypt(&#39;haowei.me&#39;);
var_dump($aes->decrypt($c));

examples, with an encryptable and decryptable class

<?PHP
/**
 * AES加密、解密类
 * @author hushangming
 * 
 * 用法：
 * <pre class="brush:php;toolbar:false">
 * // 实例化类
 * // 参数$_bit：格式，支持256、192、128，默认为128字节的
 * // 参数$_type：加密/解密方式，支持cfb、cbc、nofb、ofb、stream、ecb，默认为ecb
 * // 参数$_key：密钥，默认为abcdefghijuklmno
 * $tcaes = new TCAES(); 
 * $string = &#39;laohu&#39;;
 * // 加密
 * $encodeString = $tcaes->encode($string);
 * // 解密
 * $decodeString = $tcaes->decode($encodeString);
 * 

*/ class TCAES{ private $_bit = MCRYPT_RIJNDAEL_256; private $_type = MCRYPT_MODE_CBC; //private $_key = 'abcdefghijuklmno0123456789012345'; private $_key = 'abcdefghijuklmno'; // 密钥 private $_use_base64 = true; private $_iv_size = null; private $_iv = null; /** * @param string $_key 密钥 * @param int $_bit 默认使用128字节 * @param string $_type 加密解密方式 * @param boolean $_use_base64 默认使用base64二次加密 */ public function __construct($_key = '', $_bit = 128, $_type = 'ecb', $_use_base64 = true){ // 加密字节 if(192 === $_bit){ $this->_bit = MCRYPT_RIJNDAEL_192; }elseif(128 === $_bit){ $this->_bit = MCRYPT_RIJNDAEL_128; }else{ $this->_bit = MCRYPT_RIJNDAEL_256; } // 加密方法 if('cfb' === $_type){ $this->_type = MCRYPT_MODE_CFB; }elseif('cbc' === $_type){ $this->_type = MCRYPT_MODE_CBC; }elseif('nofb' === $_type){ $this->_type = MCRYPT_MODE_NOFB; }elseif('ofb' === $_type){ $this->_type = MCRYPT_MODE_OFB; }elseif('stream' === $_type){ $this->_type = MCRYPT_MODE_STREAM; }else{ $this->_type = MCRYPT_MODE_ECB; } // 密钥 if(!empty($_key)){ $this->_key = $_key; } // 是否使用base64 $this->_use_base64 = $_use_base64; $this->_iv_size = mcrypt_get_iv_size($this->_bit, $this->_type); $this->_iv = mcrypt_create_iv($this->_iv_size, MCRYPT_RAND); } /** * 加密 * @param string $string 待加密字符串 * @return string */ public function encode($string){ if(MCRYPT_MODE_ECB === $this->_type){ $encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type); }else{ $encodeString = mcrypt_encrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv); } if($this->_use_base64) $encodeString = base64_encode($encodeString); return $encodeString; } /** * 解密 * @param string $string 待解密字符串 * @return string */ public function decode($string){ if($this->_use_base64) $string = base64_decode($string); $string = $this->toHexString($string); if(MCRYPT_MODE_ECB === $this->_type){ $decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type); }else{ $decodeString = mcrypt_decrypt($this->_bit, $this->_key, $string, $this->_type, $this->_iv); } return $decodeString; } /** * 将$string转换成十六进制 * @param string $string * @return stream */ private function toHexString ($string){ $buf = ""; for ($i = 0; $i < strlen($string); $i++){ $val = dechex(ord($string{$i})); if(strlen($val)< 2) $val = "0".$val; $buf .= $val; } return $buf; } /** * 将十六进制流$string转换成字符串 * @param stream $string * @return string */ private function fromHexString($string){ $buf = ""; for($i = 0; $i < strlen($string); $i += 2){ $val = chr(hexdec(substr($string, $i, 2))); $buf .= $val; } return $buf; } }

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