SSH 连接是否需要使用 Public Key 以及 authorized_keys

[global_biz]

Hi,

在用 SSH 连接一台 Linux 服务器 OpenSSH 的时候，出现错误，
1939 [main] DEBUG com.sshtools.j2ssh.transport.publickey.SshKeyPairFactory - The default public key is not set! using first in list.
从上面提示来看，好像是要在连接的时候提供 Public Key ？

这些连接所需的 key 在同一个目录下， private key 的文件名是 id_dsa， public key 对应的文件名是 id_dsa.pub，
还有一个 authorized_keys 不知是什么用，

现在尝试连接的时候，只使用到了一个 id_dsa 的文件，其他文件没用上，
请大家帮下忙看下，是不是还有什么需要设置？

下面是输出结果，供参考：

481 [main] INFO com.sshtools.j2ssh.transport.cipher.SshCipherFactory  - Loading supported cipher algorithms
1307 [main] INFO com.sshtools.j2ssh.transport.kex.SshKeyExchangeFactory  - Loading key exchange methods
1335 [main] INFO com.sshtools.j2ssh.configuration.ConfigurationLoader  - JAVA version is 1.6.0_22
1339 [main] INFO com.sshtools.j2ssh.configuration.ConfigurationLoader  - Extension C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\dnsns.jar being added to classpath
1356 [main] INFO com.sshtools.j2ssh.util.ExtensionClassLoader  - Adding C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\dnsns.jar to the extension classpath
1356 [main] INFO com.sshtools.j2ssh.configuration.ConfigurationLoader  - Extension C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\localedata.jar being added to classpath
1365 [main] INFO com.sshtools.j2ssh.util.ExtensionClassLoader  - Adding C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\localedata.jar to the extension classpath
1365 [main] INFO com.sshtools.j2ssh.configuration.ConfigurationLoader  - Extension C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\sunjce_provider.jar being added to classpath
1388 [main] INFO com.sshtools.j2ssh.util.ExtensionClassLoader  - Adding C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\sunjce_provider.jar to the extension classpath
1388 [main] INFO com.sshtools.j2ssh.configuration.ConfigurationLoader  - Extension C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\sunmscapi.jar being added to classpath
1413 [main] INFO com.sshtools.j2ssh.util.ExtensionClassLoader  - Adding C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\sunmscapi.jar to the extension classpath
1413 [main] INFO com.sshtools.j2ssh.configuration.ConfigurationLoader  - Extension C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\sunpkcs11.jar being added to classpath
1435 [main] INFO com.sshtools.j2ssh.util.ExtensionClassLoader  - Adding C:\Program Files (x86)\Java\jdk1.6.0_22\jre\lib\ext\sunpkcs11.jar to the extension classpath
1435 [main] DEBUG com.sshtools.j2ssh.transport.kex.SshKeyExchangeFactory  - The default key exchange is not set! using first in list
1439 [main] INFO com.sshtools.j2ssh.transport.publickey.SshKeyPairFactory  - Loading public key algorithms
1464 [main] DEBUG com.sshtools.j2ssh.transport.publickey.SshKeyPairFactory  - The default public key is not set! using first in list
1466 [main] INFO com.sshtools.j2ssh.transport.compression.SshCompressionFactory  - Loading compression methods
1477 [main] INFO com.sshtools.j2ssh.transport.hmac.SshHmacFactory  - Loading message authentication methods
1665 [main] INFO com.sshtools.j2ssh.transport.TransportProtocolCommon  - Starting transport protocol
1670 [Transport protocol 1] INFO com.sshtools.j2ssh.transport.TransportProtocolCommon  - Registering transport protocol messages with inputstream
3113 [Transport protocol 1] INFO com.sshtools.j2ssh.transport.TransportProtocolCommon  - Negotiating protocol version
3113 [Transport protocol 1] DEBUG com.sshtools.j2ssh.transport.TransportProtocolCommon  - Local identification: SSH-2.0-http://www.sshtools.com J2SSH [CLIENT]
3114 [Transport protocol 1] DEBUG com.sshtools.j2ssh.transport.TransportProtocolCommon  - EOL is guessed at LF
3114 [Transport protocol 1] DEBUG com.sshtools.j2ssh.transport.TransportProtocolCommon  - Remote identification: SSH-2.0-OpenSSH_4.3
3114 [Transport protocol 1] INFO com.sshtools.j2ssh.transport.TransportProtocolCommon  - Protocol negotiation complete
3115 [Transport protocol 1] DEBUG com.sshtools.j2ssh.transport.TransportProtocolCommon  - SshMsgKexInit:
Supported Kex [diffie-hellman-group1-sha1]
Supported Public Keys [ssh-rsa, ssh-dss]
Supported Encryption Client->Server [blowfish-cbc, 3des-cbc]
Supported Encryption Server->Client [blowfish-cbc, 3des-cbc]
Supported Mac Client->Server [hmac-sha1, hmac-md5-96, hmac-sha1-96, hmac-md5]
Supported Mac Server->Client [hmac-sha1, hmac-md5-96, hmac-sha1-96, hmac-md5]
Supported Compression Client->Server [none]
Supported Compression Server->Client [none]
Supported Languages Client->Server []
Supported Languages Server->Client []
First Kex Packet Follows [FALSE]
3115 [Transport protocol 1] INFO com.sshtools.j2ssh.transport.TransportProtocolCommon  - Sending SSH_MSG_KEX_INIT
3139 [Transport protocol 1] ERROR com.sshtools.j2ssh.transport.TransportProtocolCommon  - The Transport Protocol thread failed
com.sshtools.j2ssh.transport.TransportProtocolException: IO Error on socket: Software caused connection abort: socket write error
	at com.sshtools.j2ssh.transport.TransportProtocolOutputStream.sendMessage(Unknown Source)
	at com.sshtools.j2ssh.transport.TransportProtocolCommon.sendMessage(Unknown Source)
	at com.sshtools.j2ssh.transport.TransportProtocolCommon.sendKeyExchangeInit(Unknown Source)
	at com.sshtools.j2ssh.transport.TransportProtocolCommon.startBinaryPacketProtocol(Unknown Source)
	at com.sshtools.j2ssh.transport.TransportProtocolCommon.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:662)
3162 [Transport protocol 1] DEBUG com.sshtools.j2ssh.transport.TransportProtocolCommon  - The Transport Protocol has been stopped

谢谢。

[Glory_Nol]

好像服務器設置了那就需要，不設置就不需要。

[qingyuan18]

id_dsa/ id_dsa.pub：你用openssh工具生成的私钥公钥对 authorized_keys ：你使用ssh连接的linux服务器需要认证你的身份，所以你需要在连接的linux服务器上安装自已的公钥，authorized_keys这里面就是存放你自己的id_dsa.pub的内容 当然ssh也可以配置为不使用RSA公钥密钥认证而使用传统用户密码，这样你用ssh连linux的时候会弹出用户密码的提示输入，具体参见etc/ssh/下配置文件中的PasswordAuthentication yes AllowedAuthentications password 来开启，不过你是用程序模拟ssh登录过程，所以还是配置好公钥密钥才是正确方式 注意你的服务器的ssh版本，ssh v2的版本才是 authorized_keys的认证文件，可以通过用户目录~/.ssh2/authorized_keys来识别 java连ssh的开源包gamay-openssh比较常用