我这边现在那个公钥(key)是一个纯的字符串，然后加密的java代码如下： /**
用公钥加密
@param data 加密数据
@param key 公钥
@return 加密后的字节数组
@throws Exception 异常 */ public static byte[] encryptByPublicKey(byte[] data, String key) throws Exception { byte[] encryptedData = null;
//对公钥解密 byte[] keyBytes = decryptBASE64(key); //取公钥 X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(keyBytes); KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORTHM); Key publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
//对数据解密 Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm()); cipher.init(Cipher.ENCRYPT_MODE, publicKey);
// 加密时超过maxEncryptBlockSize字节就报错。为此采用分段加密的办法来加密 int maxEncryptBlockSize = getMaxEncryptBlockSize(keyFactory, publicKey);
ByteArrayOutputStream bout = new ByteArrayOutputStream(); try { int dataLength = data.length; for (int i = 0; i < data.length; i += maxEncryptBlockSize) { int encryptLength = dataLength - i < maxEncryptBlockSize ? dataLength - i : maxEncryptBlockSize; byte[] doFinal = cipher.doFinal(data, i, encryptLength); bout.write(doFinal); } encryptedData = bout.toByteArray(); } finally { if (bout != null) { bout.close(); } } return encryptedData; } 我想要用node实现同样的加密方式，要怎么做呢，对加密这个不太熟悉，尝试了很多种写法，都不行，请大家指导一下