RSA加密在Java中，解密在PHP [英] RSA encryption in Java, decryption in PHP

问题描述

我试图用加密的RSA公钥和Android应用的AES密钥，然后解密使用PHP与phpseclib服务器上的AES密钥。我已经测试，以确保通过加密一个静态文本事后解密，两个平台上的RSA加密/解密的工作检查，如果我仍然得到原文。根据试验，在RSA code单独工作的每个平台上，但似乎有平台之间的差异。

I am trying to encrypt an AES key with an RSA public key in and Android app and then decrypt the AES key on a server using PHP with phpseclib. I have tested to make sure that the RSA encryption/decryption work on both platforms by encrypting a static text and decrypting it afterwards to check if I still get the original text. According to the test, the RSA code works individually on each platform but there seems to be a difference between the platforms.

在Java中，我使用的充气城堡库，并具有以下code：

In Java, I am using the Bouncy Castle library and have the following code:

RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(
new BigInteger("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", 16),
new BigInteger("11", 16));
keyFactory = KeyFactory.getInstance("RSA", "BC");
//RSAPublicKeySpec rsaKeySpec = new RSAPublicKeySpec(rsaKey.MODULUS, new BigInteger("11", 16));
RSAPublicKey pubKey = (RSAPublicKey)keyFactory.generatePublic(pubKeySpec);  

//Set up the cipher to RSA encryption
Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
cipher.init(Cipher.ENCRYPT_MODE, pubKey);

// make sure the Aes Key is less than a block size
// otherwise major errors will occur
if(AesKey.length * 8 > pubKey.getModulus().bitLength())
    return "Error: AesKey bigger than block size of RSA Key";

byte[] encryptedKey = cipher.doFinal(AesKey);

// return result Base64 encoded
return Base64.encodeToString(encryptedKey, Base64.DEFAULT);

然后在PHP中，我使用下面的code解密AES密钥：

Then in the PHP, I am using the following code to decrypt the AES key:

$AESkey = base64_decode($AES);

$rsa = new Crypt_RSA();
$private = file_get_contents($_SERVER['DOCUMENT_ROOT'].'/PrivateData/private_key.pem');
$rsa->setEncryptionMode(CRYPT_RSA_ENCRYPTION_PKCS1);
$rsa->loadKey($private);
$AESkey = $rsa->decrypt($AESkey);

在AES密钥是由服务器解密，我总是得到以下错误：解密错误在C：\\ XAMPP \\ PHP \\ PEAR \\ phpseclib \\地穴\\ RSA.php在线1911年综观$ C $下在RSA.php，我认为错误的东西已经在加密过程中做的不正确填充，但我似乎无法想出一个办法来解决它。

When the AES key is being decrypted by the server, I always get the following error: Decryption error in C:\xampp\php\PEAR\phpseclib\Crypt\RSA.php on line 1911. Looking at the code in RSA.php, I think the error has something to do with incorrect padding during encryption but I can't seem to figure out a way to fix it.

更新：我想通了，上面的加密/解密code实际上是正确的。我遇到的问题是，我没有从应用程序发送数据到PHP等等一些信息被丢失之前url可连接code的输出。

Update: I figured out that the above encryption/decryption code is actually correct. The problem I was having was that I did not url encode the output before sending the data from the app to the php so some of the info was being lost.

推荐答案

您使用的版本phpseclib的？根据不同的版本，下面可能会有帮助：

Which version of phpseclib are you using? Depending on the version the following may help:

http://www.frostjedi.com/phpbb/viewtopic。 PHP？p = 118414＃p118414

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