Git项目突然不能正常使用，自己的账号下的项目。提示Permission denied (publickey).
问题描述：
附上具体配置描述如下
.ssh文件目录：
config配置文件：
# gitee Host gitee.com HostName gitee.com PreferredAuthentications publickey IdentityFile ~/.ssh/gitee_id_rsa # github Host github.com HostName github.com PreferredAuthentications publickey IdentityFile ~/.ssh/github_id_rsa # codeup.aliyun Host codeup.aliyun.com HostName codeup.aliyun.com PreferredAuthentications publickey IdentityFile ~/.ssh/git_code_id_rsa # coding.net Host e.coding.net HostName e.coding.net PreferredAuthentications publickey IdentityFile ~/.ssh/id_rsa
测试命令：
$ ssh -T git@gitee.com Hi **! You ve successfully authenticated, but GITEE.COM does not provide shell access. $ ssh -T git@github.com Hi **! You ve successfully authenticated, but GitHub does not provide shell access. $ ssh -T git@codeup.aliyun.com Welcome to Codeup, **! $ ssh -T git@e.coding.net git@e.coding.net: Permission denied (publickey).
原因分析：
相同配置3个成功，1个失败，不应该是git软件问题，应该是配置问题，在mac上进行相同配置一气呵成一切都是那么完美。
~ ssh -T git@e.coding.net CODING 提示: Hello **, You've connected to coding.net via SSH. This is a Personal Key. **，你好，你已经通过 SSH 协议认证 coding.net 服务，这是一个个人公钥. 公钥指纹：94:db:5f:c3:87:fb:f7:e5:da:9b:4f:0c:8e:35:ef:2b
那为什么这台机器不能用呢，到底是哪里出了问题？好奇心驱动，继续寻找。经过百度发现GitHub SSH故障排除方法。
图片链接地址
检查使用的密钥：发现找到私钥文件debug1: Offering public key: /c/Users/hoomi/.ssh/id_rsa RSA 错误信息为签名错误no mutual signature algorithm，原因是OpenSSH从8.8版本由于安全原因开始弃用了rsa加密的密钥
$ ssh -Tv git@e.coding.net OpenSSH_8.9p1, OpenSSL 1.1.1n 15 Mar 2022 debug1: Reading configuration data /c/Users/hoomi/.ssh/config debug1: /c/Users/hoomi/.ssh/config line 17: Applying options for e.coding.net debug1: Reading configuration data /etc/ssh/ssh_config debug1: Connecting to e.coding.net [81.69.155.167] port 22. debug1: Connection established. debug1: identity file /c/Users/hoomi/.ssh/id_rsa type 0 debug1: identity file /c/Users/hoomi/.ssh/id_rsa-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_8.9 debug1: Remote protocol version 2.0, remote software version Go-CodingGit debug1: compat_banner: no match: Go-CodingGit debug1: Authenticating to e.coding.net:22 as 'git' debug1: load_hostkeys: fopen /c/Users/hoomi/.ssh/known_hosts2: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: curve25519-sha256@libssh.org debug1: kex: host key algorithm: rsa-sha2-512 debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC:compression: none debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: SSH2_MSG_KEX_ECDH_REPLY received debug1: Server host key: ssh-rsa SHA256:jok3FH7q5LJ6qvE7iPNehBgXRw51ErE77S0Dn+Vg/Ik debug1: load_hostkeys: fopen /c/Users/hoomi/.ssh/known_hosts2: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory debug1: Host 'e.coding.net' is known and matches the RSA host key. debug1: Found key in /c/Users/hoomi/.ssh/known_hosts:9 debug1: rekey out after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: rekey in after 134217728 blocks debug1: Will attempt key: /c/Users/hoomi/.ssh/id_rsa RSA SHA256:/jsxB0H9in7p9/U81BTwArpeQiX4OAKGxlHqL8qnzMI explicit debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering public key: /c/Users/hoomi/.ssh/id_rsa RSA SHA256:/jsxB0H9in7p9/U81BTwArpeQiX4OAKGxlHqL8qnzMI explicit debug1: send_pubkey_test: no mutual signature algorithm debug1: No more authentication methods to try. git@e.coding.net: Permission denied (publickey).
图片链接地址
解决方案：
config配置文件添加PubkeyAcceptedKeyTypes +ssh-rsa修改后配置文件如下
# gitee Host gitee.com HostName gitee.com PreferredAuthentications publickey IdentityFile ~/.ssh/gitee_id_rsa # github Host github.com HostName github.com PreferredAuthentications publickey IdentityFile ~/.ssh/github_id_rsa # codeup.aliyun Host codeup.aliyun.com HostName codeup.aliyun.com PreferredAuthentications publickey IdentityFile ~/.ssh/git_code_id_rsa # coding.net Host e.coding.net HostName e.coding.net PreferredAuthentications publickey PubkeyAcceptedKeyTypes +ssh-rsa IdentityFile ~/.ssh/id_rsa
测试命令
$ ssh -T git@e.coding.net CODING 提示: Hello **, You've connected to coding.net via SSH. This is a Personal Key. **，你好，你已经通过 SSH 协议认证 coding.net 服务，这是一个个人公钥. 公钥指纹：94:db:5f:c3:87:fb:f7:e5:da:9b:4f:0c:8e:35:ef:2b
