PhpSeclib BouncyCastle RSA

问题

I generated on server side a pair public/private keys using phpseclib like

include 'Crypt/RSA.php';
$rsa = new Crypt_RSA();
$rsa->setPrivateKeyFormat(CRYPT_RSA_PRIVATE_FORMAT_PKCS1);
$rsa->setPublicKeyFormat(CRYPT_RSA_PUBLIC_FORMAT_PKCS1);
extract($rsa->createKey());
echo $privatekey;
echo "\n\n\n";
echo $publickey;

Now I want import on client side Public key using Java Bouncy Castle engine.
Here my Public key

But I can do it. I tried to do it several ways but I always get errors.

AsymmetricKeyParameter publicKey = 
    (AsymmetricKeyParameter) PublicKeyFactory.createKey(b64.decodeBuffer(key));
AsymmetricKeyParameter publicKey = 
    (AsymmetricKeyParameter) PublicKeyFactory.createKey(key.getBytes())

Also

PEMReader pemReader = new org.bouncycastle.openssl.PEMReader (reader);
PemObject pem = pemReader.readPemObject();

All these ways generate error.

How should I import Public key using Java Bouncy Castle engine?

回答1:

I found solution

    key = key.replaceAll("PUBLIC KEY", "RSA PUBLIC KEY");
    final Reader reader = new StringReader(key);
    PEMReader pemReader = new PEMReader(reader);
    Object obj = pemReader.readObject();
    pemReader.close();
    BCRSAPublicKey bcPublicKey = (BCRSAPublicKey) obj;

    AsymmetricKeyParameter publicKey = (AsymmetricKeyParameter) PublicKeyFactory.createKey(bcPublicKey.getEncoded());

    AsymmetricBlockCipher e = new RSAEngine();
    e = new org.bouncycastle.crypto.encodings.PKCS1Encoding(e);
    e.init(true, publicKey);

    byte[] messageBytes = inputData.getBytes();
    encryptedData = e.processBlock(messageBytes, 0, messageBytes.length);

Now i can encrypt on Java side and decrypt on Server (PHP) side