Java RSA 到 PHP phpseclib RSA

Question

我正在开发一个支付网关，他们有一个正在运行的 Java 演示，但我想用 php 来实现它。

支付网关使用 3DES 和随机生成的 key 来加密有效负载。 该 key 使用支付网关的公钥通过 RSA 进行加密。

问题是当我使用 php 脚本对该 key 进行 RSA 加密时，支付网关无法正确提取 key ，并且显然 PHP 上的 RSA 加密无法正常工作...

这是 RSA 加密的 Java 版本:

public static byte[] encrypt(byte[] data, String pubKey64) {

    try {
         byte[] key = Toolkit.base64Decode(pubKey64);
         KeyFactory rsaKeyFac = KeyFactory.getInstance("RSA");
         X509EncodedKeySpec keySpec = new X509EncodedKeySpec(key);
         RSAPublicKey pbk = (RSAPublicKey) rsaKeyFac.generatePublic(keySpec);
         System.out.println("MODE:"+Cipher.ENCRYPT_MODE);
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1PADDING");
        cipher.init(Cipher.ENCRYPT_MODE, pbk);

        byte[] encDate = cipher.doFinal(data);
        return encDate;
    } catch (Exception e) {
        e.printStackTrace();
        return null;
    }
}

这是我在 PHP 脚本中得到的结果:

use phpseclib\Crypt\RSA as RSA;




$PUB_KEY = '-----BEGIN PUBLIC KEY-----
    MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDJ1fKGMV/yOUnY1ysFCk0yPP4bfOolC/nTAyHmoser+1yzeLtyYsfitYonFIsXBKoAYwSAhNE+ZSdXZs4A5zt4EKoU+T3IoByCoKgvpCuOx8rgIAqC3O/95pGb9n6rKHR2sz5EPT0aBUUDAB2FJYjA9Sy+kURxa52EOtRKolSmEwIDAQAB
-----END PUBLIC KEY-----';

$PAYLOAD = 'b78850d2f35108b4bc4e7a41';

function encrypt($key,$payload){
    $rsa = new RSA();
    $rsa->loadKey($key); // public key

    $rsa->setEncryptionMode(2);
    $ciphertext = $rsa->encrypt($payload);

    return base64_encode($ciphertext);
}

Java 版本使用 PKCSPADDING，因此我将 phpseclib 上的模式设置为 2，即 PKCSPADDING，但它仍然无法工作。我错过了什么吗？谁能帮我指点一下吗？

更新:

不确定这是否是导致它的原因，但我删除了“-----BEGIN PUBLIC KEY-----”和“-----END PUBLIC KEY ----”部分，它工作了。

感谢大家的帮助。

Answer 1

在开始加密过程之前，尝试执行 define('CRYPT_RSA_PKCS15_COMPAT', true); 操作。

引用 phpseclib 2.0 的 RSA.php:

/**
 * RSAES-PKCS1-V1_5-DECRYPT
 *
 * See {@link http://tools.ietf.org/html/rfc3447#section-7.2.2 RFC3447#section-7.2.2}.
 *
 * For compatibility purposes, this function departs slightly from the description given in RFC3447.
 * The reason being that RFC2313#section-8.1 (PKCS#1 v1.5) states that ciphertext's encrypted by the
 * private key should have the second byte set to either 0 or 1 and that ciphertext's encrypted by the
 * public key should have the second byte set to 2.  In RFC3447 (PKCS#1 v2.1), the second byte is supposed
 * to be 2 regardless of which key is used.  For compatibility purposes, we'll just check to make sure the
 * second byte is 2 or less.  If it is, we'll accept the decrypted string as valid.
 *
 * As a consequence of this, a private key encrypted ciphertext produced with \phpseclib\Crypt\RSA may not decrypt
 * with a strictly PKCS#1 v1.5 compliant RSA implementation.  Public key encrypted ciphertext's should but
 * not private key encrypted ciphertext's.
 *
 * @access private
 * @param string $c
 * @return string
 */