JSch:从存储在hdfs上的私钥获取addIdentity [英] JSch: addIdentity from private key stored on hdfs

问题描述

我需要从hadoop集群连接到sftp服务器.我想知道是否有一种方法可以从存储在hdfs中的私钥加载身份.实际上，似乎JSch对象仅接受本地路径:

I need to connect to an sftp server from an hadoop cluster. I would like to know if there is a way to load an identity from a private key stored in hdfs. Actually it seems that the JSch object accepts only a local path:

try {
    String privateKeyPath = "hdfs://namenode:8020/path/to/privatekey";  // need this one to be an hdfs path
    JSch jsch = new JSch();

    jsch.addIdentity(privateKeyPath);

    // [..]
}
catch (Exception ex) {
    // [..]
}

有什么主意吗?

推荐答案

感谢@Martin Prikryl的回答，解决方法如下:

Thanks to @Martin Prikryl answer, solved as following:

// Get sftp private/public key for JSch identity
FSDataInputStream fis = fs.open(privateKeyPath);
byte[] privateKeyBytes = IOUtils.toByteArray(fis);

fis = fs.open(publicKeyPath);
byte[] publicKeyBytes = IOUtils.toByteArray(fis);
fis.close();

JSch jsch = new JSch();
String idName = "ksftp";
byte[] passphrase = null;  
jsch.addIdentity(idName, privateKeyBytes, publicKeyBytes, passphrase);

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