算法/模式/填充 16字节加密后数据长度 不满16字节加密后长度
AES/CBC/NoPadding 16 不支持
AES/CBC/PKCS5Padding 32 16
AES/CBC/ISO10126Padding 32 16
AES/CFB/NoPadding 16 原始数据长度
AES/CFB/PKCS5Padding 32 16
AES/CFB/ISO10126Padding 32 16
AES/ECB/NoPadding 16 不支持
AES/ECB/PKCS5Padding 32 16
AES/ECB/ISO10126Padding 32 16
AES/OFB/NoPadding 16 原始数据长度
AES/OFB/PKCS5Padding 32 16
AES/OFB/ISO10126Padding 32 16
AES/PCBC/NoPadding 16 不支持
AES/PCBC/PKCS5Padding 32 16
AES/PCBC/ISO10126Padding 32 16
下面就是在PHP中使用AES对数据加密
AES-CBC 加密方案
<?php
namespace appcommonlib;
/**
* aes 加密 解密类库
* @by singwa
* Class Aes
* @package appcommonlib
*/
class Aes {
private $key = null;
/**
*
* @param $key 密钥
* @return String
*/
public function __construct() {
$this->key = 'testkeyabcdef123'; //key长度严格要求
}
/**
* 加密
* @param String input 加密的字符串
* @param String key 解密的key
* @return HexString
*/
public function encrypt($input = '') {
//AES, 128 ECB模式加密数据
$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$input = $this->pkcs5_pad($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, $this->key, $iv);
$data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$data = base64_encode($data);
return $data;
}
/**
* 填充方式 pkcs5
* @param String text 原始字符串
* @param String blocksize 加密长度
* @return String
*/
private function pkcs5_pad($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
/**
* 解密
* @param String input 解密的字符串
* @param String key 解密的key
* @return String
*/
public function decrypt($sStr) {
//AES, 128 ECB模式加密数据
$decrypted= mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$this->key,base64_decode($sStr), MCRYPT_MODE_ECB);
$dec_s = strlen($decrypted);
$padding = ord($decrypted[$dec_s-1]);
$decrypted = substr($decrypted, 0, -$padding);
return $decrypted;
}
}
$obj = new Aes ();
$str = "?name=test&age=20&height=178";
echo $obj->encrypt($str); //HpMdCda98M2oNBjVEdkoNygv+IMFl8uuWOJcpi6fo9w=
$str2 = 'xY+bQio6wRw6lxWZeiahw9YOfjbbHI23Pj0XLBn21y4=';
echo '<br>';
echo $obj->decrypt($str2);
xY+bQio6wRw6lxWZeiahw9YOfjbbHI23Pj0XLBn21y4= //结果
?name=test&age=20&height=178 //结果
切记,如果加密的key不是按照要求的位数会报错
Warning: mcrypt_decrypt(): Key of size 48 not supported by this algorithm. Only keys of sizes 16, 24 or 32 supported in