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  • php实现AES/CBC/PKCS5Padding加密解密(又叫:对称加密)

    今天在做一个和java程序接口的架接,java那边需要我这边(PHP)对传过去的值进行AES对称加密,接口返回的结果也是加密过的(就要用到解密),然后试了很多办法,也一一对应了AES的key密钥值,偏移量(IV)的值,都还是不能和java加密解密的结果一样,我很郁闷,我很焦躁。接着我就去找了一些文档,结果发现PHP里面补码方式只有:ZeroPadding这一种方式,而java接口那边是用PKCS5Padding补码方式,发现了问题所在,就编写了如下PHP实现AES/CBC/PKCS5Padding的加密解密方式。如有错误,还请指正!下面贴出详细代码

    <?php
    
    class MagicCrypt {
    	private $iv = "0102030405060708";//密钥偏移量IV,可自定义
    
    	private $encryptKey = "自定义16位长度key";//AESkey,可自定义
    
    	//加密
    	public function encrypt($encryptStr) {
    		$localIV = $this->iv;
    		$encryptKey = $this->encryptKey;
    
    		//Open module
    		$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);
    
    		//print "module = $module <br/>" ;
    
    		mcrypt_generic_init($module, $encryptKey, $localIV);
    
    		//Padding
    		$block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
    		$pad = $block - (strlen($encryptStr) % $block); //Compute how many characters need to pad
    		$encryptStr .= str_repeat(chr($pad), $pad); // After pad, the str length must be equal to block or its integer multiples
    
    		//encrypt
    		$encrypted = mcrypt_generic($module, $encryptStr);
    
    		//Close
    		mcrypt_generic_deinit($module);
    		mcrypt_module_close($module);
    
    		return base64_encode($encrypted);
    
    	}
    
    	//解密
    	public function decrypt($encryptStr) {
    		$localIV = $this->iv;
    		$encryptKey = $this->encryptKey;
    
    		//Open module
    		$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, $localIV);
    
    		//print "module = $module <br/>" ;
    
    		mcrypt_generic_init($module, $encryptKey, $localIV);
    
    		$encryptedData = base64_decode($encryptStr);
    		$encryptedData = mdecrypt_generic($module, $encryptedData);
    
    		return $encryptedData;
    	}
    }
    $encryptString = 'gz1DR+BsCzQe55HFdq1IiQ==';
    $encryptObj = new MagicCrypt();
    
    $result = $encryptObj->encrypt($encryptString);//加密结果
    $decryptString = $decryptString = $encryptObj->decrypt($result);//解密结果
    echo $result . "<br/>";
    echo $decryptString . "<br/>";
    ?>
    

      

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  • 原文地址:https://www.cnblogs.com/ygcool/p/5686258.html
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