用SSH密钥配置一个新的数字海洋液滴。当我运行ssh-copy-id时,这是我得到的:

ssh-copy-id user@012.345.67.89
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
sign_and_send_pubkey: signing failed: agent refused operation
user@012.345.67.89's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'user@012.345.67.89'"
and check to make sure that only the key(s) you wanted were added.

然而,当我尝试ssh时,会发生这种情况:

ssh user@012.345.67.89
sign_and_send_pubkey: signing failed: agent refused operation
user@012.345.67.89's password: 

输入密码后,我可以正常登录,但这当然违背了创建SSH密钥的初衷。我决定看看ssh-agent服务器端,下面是我得到的:

user@012.345.67.89:~# eval `ssh-agent -s`
Agent pid 5715
user@012.345.67.89:~# ssh-add -l
The agent has no identities.

用户/。Ssh /authorized_keys也包含Ssh -rsa密钥条目,但是find name "keynamehere"没有返回任何内容。


当前回答

In my case the problem was that GNOME keyring was holding an invalid passphrase for the ssh key to be used. After spending indecent amount of time troubleshooting this issue I ran seahorse and found the entry to hold empty string. I can only guess that it was caused by mistyping the passphrase at first use some time earlier, and then probably cancelling the requester or so in order to fall back to command line. Updating the entry with correct passphrase immediately solved the problem. Deleting that entry (from "login" keyring) and reentering passphrase at that first prompt (and checking the appropriate checkbox) solves this too. Now agent gets the correct passphrase from the unlocked at login keyring named "login" and neither asks for passphrase nor "refuses operation" anymore. Of course YMMV.

其他回答

我得到了一个sign_and_send_pubkey: signing failed: agent refused操作错误。但在我的案例中,问题是错误的pinentry路径。

在我的${HOME}/.gnupg/gpg-agent.conf中,pinentry-program属性指向一个旧的pinentry路径。修正路径并重新启动gpg-agent为我修复了它。

我通过使用journalctl -f跟踪日志发现了它。像下面这样的日志行包含了错误的路径:

Jul 02 08:37:50 my-host gpg-agent[12677]: ssh sign request failed: No pinentry <GPG Agent>
Jul 02 08:37:57 my-host gpg-agent[12677]: can't connect to the PIN entry module '/usr/local/bin/pinentry': IPC connect call failed

对于这个错误:

# git pull
sign_and_send_pubkey: signing failed: agent refused operation
git@github.com: Permission denied (publickey).    
fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists.

在Github帐户>配置文件> ssh中再次验证或添加公钥。

我是这样解决的:

# chmod 400 ~/.ssh/id_rsa

# ls  ~/.ssh/id_rsa -ls  
4 -r--------. 1 reinaldo reinaldo 1679 Jul 26  2017 /home/reinaldo/.ssh/id_rsa

# git pull                                 
remote: Counting objects: 35, done.
remote: Compressing objects: 100% (19/19), done.
remote: Total 35 (delta 9), reused 34 (delta 9), pack-reused 0
Unpacking objects: 100% (35/35), done.

谢谢你!

注意如何命名ssh密钥文件

如果您有多个密钥对,您可以使用ssh-keygen和-f <密钥名称>来命名输出文件。在我的例子中,我将密钥命名为username@organization和username@organization.pub,这有助于保持多个密钥对的组织。

问题是ssh代理不喜欢@字符。

在我的例子中,这导致了sign_and_send_pubkey: signing failed: agent refused操作错误,并阻止会话密匙环与ssh代理交互。

将密钥文件重命名为username_at_organization解决了这个问题。

根据Github安全博客,SHA-1的RSA密钥不再被接受。

使用以下命令创建新的带有ECDSAencryption的SSH密钥,并将其添加到Github。

ssh-keygen -t ecdsa -b 521 -C "your_email@example.com"

原始答案和细节可以在这里找到

导致SSH错误的原因有很多:

Sign_and_send_pubkey:签名失败:代理拒绝操作

其中一些问题可能与其他答案所强调的问题有关(请参阅此线程的答案),其中一些问题可能被隐藏,因此需要更仔细的调查。

在我的情况下,我得到了以下错误消息:

Sign_and_send_pubkey:签名失败:代理拒绝操作 user@website.domain.com:权限被拒绝(publickey, gsapi -keyex, gsapi -with-mic)

找到真正问题的唯一方法是调用-v verbose选项,这将导致打印大量调试信息:

debug1: Connecting to website.domain.com [xxx.xxx.xxx.xxx] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/id_rsa.website.domain.com type 0
debug1: key_load_public: No such file or directory
debug1: identity file /home/user/.ssh/id_rsa.website.domain.com-cert type -1

请注意,key_load_public: No such file或directory指的是下一行,而不是上一行。

因此,SSH真正说的是,它无法找到名为id_rsa.website.domain.com-cert的公钥文件,这似乎是我的情况下的问题,因为我的公钥文件不包含-cert后缀。

长话短说:在我的案例中,修复只是确保公钥文件按预期命名。如果不调试连接,我绝不会怀疑这一点。

底线是使用SSH VERBOSE模式(-v选项)来找出哪里出了问题,可能有各种原因,在这个/另一个线程上找不到任何原因。