akullpp

SSH Keys and OS X

Somehow the default permissions of new SSH keys on OS X are 0644 which is not only bad idea but won’t allow you to push stuff. So, how do you fix it?

You probably generated your key with:

ssh-keygen -t rsa -C "[email protected]"

Now you want to push some stuff which results in this beautiful error message:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@         WARNING: UNPROTECTED PRIVATE KEY FILE!          @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0644 for '/Users/akull/.ssh/id_rsa_bar.pub' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
Load key "/Users/akull/.ssh/id_rsa_bar.pub": bad permissions
Permission denied (publickey).
fatal: Could not read from remote repository.

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

The quick fix is to set the permissions to 600 for the private key and then to add it:

chmod 600 ~/.ssh/id_rsa_bar
ssh-add -K ~/.ssh/id_rsa_bar

If this won’t help, you should try to generate a new key first and then repeat the steps:

ssh-keygen -y -f ~/.ssh/id_rsa_bar > ~/.ssh/id_rsa_bar.pub

Bonus:

If you need to set the key only for a specific host, create a ~/.ssh/config file with the following content:

Host foo.bar.baz
RSAAuthentication yes
IdentityFile ~/.ssh/id_rsa_bar.pub