使用JSch连接到服务器而无需用户名或密码

Question

我正在使用com.jcraft.jsch.JSch创建SFTP连接。

我的SSH密钥设置为可以直接通过SSH连接到服务器而无需用户名或密码。

ssh test_server 

我的公钥是在authorized_key文件在我的本地机器上[email protected]_server:~/.ssh/
我的SSH密钥是C:\cygwin\home\me\.ssh\
另外，我也有一个配置文件，该目录中的文件known_hosts。

Host test_server 
User user_name 
HostName test_server.domain.com 
ForwardAgent yes 

要仔细检查，我确信，中C:\cygwin\home\me\.ssh我的公钥是在远程服务器上的文件authorized_keys。

我正在开发一个GUI程序来创建一个文件。使用该文件，我希望能够将它存储在远程服务器上，并使用SFTP将其放在一个文件夹中。我怎么能做到这一点？

这是我到目前为止有：

public static void main(String[] arg) { 
    try { 
     JSch jsch = new JSch(); 

     String user = ""; 
     String host = "test_server"; 
     int port = 22; 
     String privateKey = "C:/cygwin/home/me/.ssh/id_rsa"; 

     jsch.addIdentity(privateKey); 
     System.out.println("identity added "); 

     Session session = jsch.getSession("", host); 
     System.out.println("session created."); 

     session.connect(); 
     System.out.println("session connected....."); 

     Channel channel = session.openChannel("sftp"); 
     channel.setInputStream(System.in); 
     channel.setOutputStream(System.out); 
     channel.connect(); 
     System.out.println("shell channel connected...."); 

     ChannelSftp c = (ChannelSftp) channel; 

     String fileName = "test.txt"; 
     c.put(fileName, "./in/"); 
     c.exit(); 
     System.out.println("done"); 

    } catch (Exception e) { 
     System.err.println(e); 
    } 
} 

我不断收到一个

com.jcraft.jsch.JSchException：验证失败的错误。

有没有人知道这个解决方案？

附加信息（这可能是非常有用的......不确定）：
当我打开cmd时，它会带我到C:\Users\me。
但是，当我通过“密码”命令，它打印出/cygdrive/c/Users/me。
我也开放给任何新的图书馆，或者也许只是一个更好的方式来做到这一点。

非常感谢！

输出为ssh -v test_server：

OpenSSH_7.4p1, OpenSSL 1.0.2k 26 Jan 2017 
debug1: Reading configuration data /home/me/.ssh/config 
debug1: /home/me/.ssh/config line 1: Applying options for * 
debug1: /home/me/.ssh/config line 9: Applying options for wmpos1 
debug1: Control socket "/home/me/.ssh/[email protected]_server:22" d 
oes not exist 
debug1: Connecting to test_server [127.0.0.1] port 22. 
debug1: Connection established. 
debug1: identity file /home/me/.ssh/id_rsa type 1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_rsa-cert type -1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_dsa type -1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_dsa-cert type -1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_ecdsa type -1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_ecdsa-cert type -1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_ed25519 type -1 
debug1: key_load_public: No such file or directory 
debug1: identity file /home/me/.ssh/id_ed25519-cert type -1 
debug1: Enabling compatibility mode for protocol 2.0 
debug1: Local version string SSH-2.0-OpenSSH_7.4 
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2 
debug1: match: OpenSSH_6.2 pat OpenSSH* compat 0x04000000 
debug1: Authenticating to test_server:22 as 'user_name' 
debug1: SSH2_MSG_KEXINIT sent 
debug1: SSH2_MSG_KEXINIT received 
debug1: kex: algorithm: ecdh-sha2-nistp256 
debug1: kex: host key algorithm: ecdsa-sha2-nistp256 
debug1: kex: server->client cipher: aes128-ctr MAC: [email protected] comp 
ression: none 
debug1: kex: client->server cipher: aes128-ctr MAC: [email protected] comp 
ression: none 
debug1: sending SSH2_MSG_KEX_ECDH_INIT 
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY 
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:aV1o2Laclf7vRU2QOH+iWpuYYmy2 
bokk8uQrVEaPL8k 
debug1: Host 'test_server' is known and matches the ECDSA host key. 
debug1: Found key in /home/me/.ssh/known_hosts:2 
debug1: rekey after 4294967296 blocks 
debug1: SSH2_MSG_NEWKEYS sent 
debug1: expecting SSH2_MSG_NEWKEYS 
debug1: SSH2_MSG_NEWKEYS received 
debug1: rekey after 4294967296 blocks 
debug1: SSH2_MSG_SERVICE_ACCEPT received 
debug1: Authentications that can continue: publickey,keyboard-interactive 
debug1: Next authentication method: publickey 
debug1: Offering RSA public key: /home/me/.ssh/id_rsa 
debug1: Server accepts key: pkalg ssh-rsa blen 151 
debug1: Authentication succeeded (publickey). 
Authenticated to test_server ([127.0.0.1]:22). 
debug1: channel 0: new [client-session] 
debug1: Requesting [email protected] 
debug1: Entering interactive session. 
debug1: pledge: network 

Answer 1

，你不明确指定用户名上ssh命令行并不意味着，没有用户名使用的事实。

ssh默认使用本地用户名隐式。 JSch不会那样做。您必须明确指定用户名，即使它与本地用户名相同。