CODEWITHSUNDEEP
gitsshssh-keysssh-agent
mperrin
mperrin

Reputation: 994

Git ask for SSH passphrase even if present in ssh-agent

I use git with ssh-agent on a daily basis on my Mac and it works flawlessly. However, on my remote development server, I should miss something because I can't bypass the prompt for the SSH password when doing remote git operations.

Setup

  1. The key is listed in the ssh-agent: ssh-add -L:

    ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCktk2+zRYGy0RdM6HJ8JFVPjiNknK7iN8ohdCGSX9fPQ.... 
/home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket

  2. The key is associated to bitbucket in ~/.ssh/config:

    Host *
    IdentitiesOnly yes
    ServerAliveInterval 600
    ServerAliveCountMax 5
    TCPKeepAlive no
    IdentitiesOnly yes


Host bitbucket bitbucket.org
   User git
   Hostname bitbucket.org
   KexAlgorithms diffie-hellman-group1-sha1
   Identityfile  /home/user/.ssh/id_rsa.user@server_to_git@bitbucket

  3. Environment variables export | grep SSH_A:

    SSH_AGENT_PID=30294
SSH_AUTH_SOCK=/tmp/ssh-IS3rVQtFwDxF/agent.30292

  4. Agent is running ps -e | grep -q ssh-agent && echo "SSH Agent is running" returns

    SSH Agent is running

  5. Permissions ls -al ~/.ssh:

    total 48K
drwx------  2 user user 4,0K oct.  30 18:22 .
drwxr-xr-x 18 user user 4,0K nov.   7 11:52 ..
-rw-------  1 user user  431 mai   10  2016 authorized_keys
lrwxrwxrwx  1 user user   62 oct.  30 16:50 config -> /home/user/.dotfiles/machine-specific/base/ssh/config
-rw-------  1 user user  134 mars  26  2017 environment-
-rw-------  1 user user  137 nov.   7 11:22 environment-server
-rw-------  1 user user 1,8K mai   16 13:38 id_rsa.from_user@server_to_git@bitbucket
-rw-r--r--  1 user user 2,6K oct.  30 11:02 known_hosts

  6. My "hardened" /etc/ssh/ssh_config:

    AddressFamily inet
BatchMode no
CheckHostIP yes
Ciphers [email protected],[email protected],[email protected],aes256-ctr,aes192-ctr,aes128-ctr
Compression yes
ForwardAgent no
ForwardX11 no
GSSAPIAuthentication no
GSSAPIDelegateCredentials no
Host *
    HashKnownHosts yes
    SendEnv LANG LC_*
HostbasedAuthentication no
KexAlgorithms [email protected],diffie-hellman-group-exchange-sha256
MACs [email protected],[email protected],[email protected],[email protected],hmac-sha2-512,hmac-sha2-256,hmac-ripemd160
PasswordAuthentication no
PermitLocalCommand no
Port 22
Protocol 2
RSAAuthentication yes
RhostsRSAAuthentication no
StrictHostKeyChecking ask
Tunnel no

However

  1. Running git clone bitbucket:team/project.git returns

    Enter passphrase for key '/home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket':

Debug

  1. Result ssh -v bitbucket:

    OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /home/user/.ssh/config
debug1: /home/user/.ssh/config line 1: Applying options for *
debug1: /home/user/.ssh/config line 10: Applying options for bitbucket
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 12: Applying options for *
debug1: Hostname has changed; re-reading configuration
debug1: Reading configuration data /home/user/.ssh/config
debug1: /home/user/.ssh/config line 1: Applying options for *
debug1: /home/user/.ssh/config line 10: Applying options for bitbucket.org
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 12: Applying options for *
debug1: Connecting to bitbucket.org [104.192.143.2] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket type -1
debug1: identity file /home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket-cert type -1
debug1: identity file /home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket type -1
debug1: identity file /home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.8
debug1: Remote protocol version 2.0, remote software version conker_1.0.314-df0526e app-132
debug1: no match: conker_1.0.314-df0526e app-132
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client [email protected] <implicit> none
debug1: kex: client->server [email protected] <implicit> none
debug1: sending SSH2_MSG_KEXDH_INIT
debug1: expecting SSH2_MSG_KEXDH_REPLY
debug1: Server host key: RSA 97:8c:hidden:hidden:....
debug1: Host 'bitbucket.org' is known and matches the RSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket
debug1: key_parse_private2: missing begin marker
debug1: key_parse_private_pem: PEM_read_PrivateKey failed
debug1: read PEM private key done: type <unknown>
Enter passphrase for key '/home/user/.ssh/id_rsa.from_user@server_to_git@bitbucket':

Any hint ?

Upvotes: 2

Views: 504

Answers (1)

mperrin
mperrin

Reputation: 994

I just discovered that IdentitiesOnly needs the public key to be present on the local machine to works.

Upvotes: 1

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