无法使用 ssh 密钥克隆 Gitlab 私有仓库。密钥验证不起作用答案

【问题标题】：Can't clone Gitlab private repo using ssh keys. Key authentication doesn't work无法使用 ssh 密钥克隆 Gitlab 私有仓库。密钥验证不起作用
【发布时间】：2021-05-14 08:49:20
【问题描述】：

我的 .ssh 下有默认密钥对，并在 https://gitlab.com/profile/keys 中添加了 id_rsa.pub 但仍然无法使用此密钥访问 gitlab。

ssh -vT git@gitlab.com

无法登录：

$ ssh -vT git@gitlab.com
OpenSSH_7.9p1, LibreSSL 2.7.3
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 48: Applying options for *
debug1: Connecting to gitlab.com [35.231.145.151] port 22.
debug1: Connection established.
debug1: identity file /Users/denysobukhov/.ssh/id_rsa type 0
debug1: identity file /Users/denysobukhov/.ssh/id_rsa-cert type -1
debug1: identity file /Users/denysobukhov/.ssh/id_dsa type -1
debug1: identity file /Users/denysobukhov/.ssh/id_dsa-cert type -1
debug1: identity file /Users/denysobukhov/.ssh/id_ecdsa type -1
debug1: identity file /Users/denysobukhov/.ssh/id_ecdsa-cert type -1
debug1: identity file /Users/denysobukhov/.ssh/id_ed25519 type -1
debug1: identity file /Users/denysobukhov/.ssh/id_ed25519-cert type -1
debug1: identity file /Users/denysobukhov/.ssh/id_xmss type -1
debug1: identity file /Users/denysobukhov/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9
debug1: Remote protocol version 2.0, remote software version ROSSSH
debug1: no match: ROSSSH
debug1: Authenticating to gitlab.com:22 as 'git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: diffie-hellman-group-exchange-sha256
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha1 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha1 compression: none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(2048<7680<8192) sent
debug1: got SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: got SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: ssh-rsa SHA256:pZaBIOeFjqundQMWm8JAamGIUe63cxi7G4ZTpGM5C+Y
debug1: Host 'gitlab.com' is known and matches the RSA host key.
debug1: Found key in /Users/denysobukhov/.ssh/known_hosts:19
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: Will attempt key: /Users/denysobukhov/.ssh/id_rsa RSA SHA256:x3OEhLg/QPPUvr1f4IPo0+uHv8q73Da1TGjUnzD8FdQ
debug1: Will attempt key: /Users/denysobukhov/.ssh/id_dsa
debug1: Will attempt key: /Users/denysobukhov/.ssh/id_ecdsa
debug1: Will attempt key: /Users/denysobukhov/.ssh/id_ed25519
debug1: Will attempt key: /Users/denysobukhov/.ssh/id_xmss
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /Users/denysobukhov/.ssh/id_rsa RSA SHA256:x3OEhLg/QPPUvr1f4IPo0+uHv8q73Da1TGjUnzD8FdQ
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /Users/denysobukhov/.ssh/id_dsa
debug1: Trying private key: /Users/denysobukhov/.ssh/id_ecdsa
debug1: Trying private key: /Users/denysobukhov/.ssh/id_ed25519
debug1: Trying private key: /Users/denysobukhov/.ssh/id_xmss
debug1: Next authentication method: password
git@gitlab.com's password:
debug1: Authentications that can continue: password
debug1: Next authentication method: password
Permission denied, please try again.
git@gitlab.com's password:

无法克隆

git clone git@gitlab.com:denysobukhov/myprj

$ git clone git@gitlab.com:denysobukhov/myprj
Cloning into 'myprj'...
git@gitlab.com's password:

我的配置

cat /etc/ssh/ssh_config

$ cat /etc/ssh/ssh_config
Host *
    SendEnv LANG LC_*

将以下内容添加到空 ~/.ssh/config 没有帮助：

Host gitlab.com
    Hostname gitlab.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa

为什么我的密钥不起作用？

【问题讨论】：

根据调试跟踪，您的客户端向服务器提供了 .ssh/id_rsa，而服务器不接受它。有几件事可能会导致这种情况。例如，您的 id_rsa.pub 文件可能与 id_rsa 文件不匹配，因此您使用错误的公钥设置了 github。
你可以先执行eval $(ssh-agent -s)，然后再执行ssh-add ~/.ssh/id_rsa，然后再试一次吗？我记得那曾经是为我做的。如果这不起作用，请尝试删除您的 rsa 密钥 - 如果您不将其用于其他任何用途 - 并按照 these instructions 从头开始。
我将此密钥用于其他服务，无法删除。我创建了一个自定义密钥： gitlab_id_rsa 。添加它：ssh-add ~/.ssh/gitlab_id_rsa $ ssh-add -l 4096 SHA256:BU0W1JRLgxvBPyXSYZ7qphRelLAECdDyvlAJndR1+4k denys2@DENYSs-MacBook-Pro.local (RSA) 2048 SHA256:x3OEhLg/QPPUvr1f4IPo0+uHv8q73Da1TGjUnzD8FdQ denys@DENYSs-MacBook-Pro.local (RSA) 更新 ~/.ssh/config。 IdentityFile ~/.ssh/gitlab_id_rsa 它没有帮助。我的第二台电脑也有同样的问题。

标签： git ssh gitlab ssh-keys

【解决方案1】：

我在尝试从私人 GitLab 存储库推/拉时遇到了类似的问题（通过 Google 找到）。

已使用 HTTPS 克隆了 git 存储库，例如https://gitlab.com/user/repo.git，在设置任何 SSH 密钥之前。

为了使 SSH 身份验证用于拉/推，即使在 GitLab 设置中设置了 SSH 密钥后，远程 URL 也必须更改为 SSH 版本git@gitlab.com:user/repo.git。

git remote set-url origin git@gitlab.com:user/repo.git

（假设您的遥控器称为 origin。）

这可能只是必要的，但还不够，因为我尝试了很多其他的东西，但没有在它们自己不起作用时重置更改。

【讨论】：

【解决方案2】：

终于找到解决办法：生成新的ED25519 SSH密钥对

ssh-keygen -t ed25519 -C "email@example.com"

并将以下内容添加到 ~/.ssh/config 中：

Host gitlab.com
  Hostname altssh.gitlab.com
  User git
  Port 443
  PreferredAuthentications publickey

还验证了~/.ssh/config修改是决定性的。

【讨论】：