sshd 忽略authorized_keys 并继续尝试authorized_keys2

Question

我刚刚将我的公钥上传到服务器，确保权限正确，当我尝试登录时，它只是拒绝它。

在 sshd_config 中启用日志级别调试后，我得到：

Nov 22 06:53:36 host-1 sshd[8612]: debug1: Forked child 8617.
Nov 22 06:53:36 host-1 sshd[8617]: Set /proc/self/oom_score_adj to 0
Nov 22 06:53:36 host-1 sshd[8617]: debug1: rexec start in 5 out 5 newsock 5 pipe 7 sock 8
Nov 22 06:53:36 host-1 sshd[8617]: debug1: inetd sockets after dupping: 3, 3
Nov 22 06:53:36 host-1 sshd[8617]: Connection from some_ip port 50466
Nov 22 06:53:36 host-1 sshd[8617]: debug1: HPN Disabled: 0, HPN Buffer Size: 87380
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Client protocol version 2.0; client software version OpenSSH_6.0p1 Debian-3
Nov 22 06:53:36 host-1 sshd[8617]: SSH: Server;Ltype: Version;Remote: some_ip-50466;Protocol: 2.0;Client: OpenSSH_6.0p1 Debian-3
Nov 22 06:53:36 host-1 sshd[8617]: debug1: match: OpenSSH_6.0p1 Debian-3 pat OpenSSH*
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Remote is NON-HPN aware
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Enabling compatibility mode for protocol 2.0
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Local version string SSH-2.0-OpenSSH_5.8p1-hpn13v10
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Config token is loglevel
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Config token is passwordauthentication
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Config token is permitemptypasswords
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Config token is usepam
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Config token is subsystem
Nov 22 06:53:36 host-1 sshd[8617]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Nov 22 06:53:36 host-1 sshd[8617]: debug1: trying public key file /home/xxx/.ssh/authorized_keys
Nov 22 06:53:36 host-1 sshd[8617]: debug1: fd 4 clearing O_NONBLOCK
Nov 22 06:53:36 host-1 sshd[8617]: debug1: restore_uid: 0/0
Nov 22 06:53:36 host-1 sshd[8617]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Nov 22 06:53:36 host-1 sshd[8617]: debug1: trying public key file /home/xxx/.ssh/authorized_keys2
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Could not open authorized keys '/home/xxx/.ssh/authorized_keys2': No such file or directory
Nov 22 06:53:36 host-1 sshd[8617]: debug1: restore_uid: 0/0
Nov 22 06:53:36 host-1 sshd[8617]: Failed publickey for xxx from some_ip port 50466 ssh2
Nov 22 06:53:36 host-1 sshd[8617]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Nov 22 06:53:36 host-1 sshd[8617]: debug1: trying public key file /home/xxx/.ssh/authorized_keys
Nov 22 06:53:36 host-1 sshd[8617]: debug1: fd 4 clearing O_NONBLOCK
Nov 22 06:53:36 host-1 sshd[8617]: debug1: restore_uid: 0/0
Nov 22 06:53:36 host-1 sshd[8617]: debug1: temporarily_use_uid: 1000/1000 (e=0/0)
Nov 22 06:53:36 host-1 sshd[8617]: debug1: trying public key file /home/xxx/.ssh/authorized_keys2
Nov 22 06:53:36 host-1 sshd[8617]: debug1: Could not open authorized keys '/home/xxx/.ssh/authorized_keys2': No such file or directory
Nov 22 06:53:36 host-1 sshd[8617]: debug1: restore_uid: 0/0
Nov 22 06:53:36 host-1 sshd[8617]: Failed publickey for xxx from some_ip port 50466 ssh2
Nov 22 06:53:36 host-1 sshd[8617]: debug1: do_cleanup

它一直在尝试authorized_keys2（我虽然在任何地方都不推荐使用）但它确实在某个时候打开了authorized_keys（带有我的密钥的正确文件）然后绝对没有更多关于它并返回authorized_keys2

这里有什么问题？

我的 sshd_config 中有：

PubkeyAuthentication yes
AuthorizedKeysFile      .ssh/authorized_keys

并且该文件中的任何地方都没有authorized_keys2 字符串。是的，sshd 在测试之前重新启动。

我想我只能使用authorized_keys2，但想了解这里发生了什么。有什么线索吗？

---

编辑：ssh -v 主机

client$ ssh -v host
OpenSSH_6.0p1 Debian-3, OpenSSL 1.0.1c 10 May 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to host [someip] port 22.
debug1: Connection established.
debug1: identity file /home/xxx/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
debug1: identity file /home/xxx/.ssh/id_rsa-cert type -1
debug1: identity file /home/xxx/.ssh/id_dsa type 2
debug1: Checking blacklist file /usr/share/ssh/blacklist.DSA-1024
debug1: Checking blacklist file /etc/ssh/blacklist.DSA-1024
debug1: identity file /home/xxx/.ssh/id_dsa-cert type -1
debug1: identity file /home/xxx/.ssh/id_ecdsa type -1
debug1: identity file /home/xxx/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8p1-hpn13v10
debug1: match: OpenSSH_5.8p1-hpn13v10 pat OpenSSH_5*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.0p1 Debian-3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA xx:xx...
debug1: Host 'host' is known and matches the ECDSA host key.
debug1: Found key in /home/xxx/.ssh/known_hosts:11
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering DSA public key: /home/xxx/.ssh/id_dsa
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Offering RSA public key: /home/xxx/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Trying private key: /home/xxx/.ssh/id_ecdsa
debug1: Next authentication method: keyboard-interactive
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: password
xxx@host's password: 

Answer 1

authorized_keys2当它找不到有效authorized_keys文件时，它看起来像是出于兼容性原因而退回。检查您的authorized_keys 文件的格式是否正确。