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Merge pull request #5328 from mcornella/ssh-agent-refactor
Refactor of ssh-agent plugin
This commit is contained in:
Marc Cornellà
GitHub
commit
e92ac8932c
2 changed files with 65 additions and 64 deletions
38
plugins/ssh-agent/README.md
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38
plugins/ssh-agent/README.md
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# ssh-agent plugin
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This plugin starts automatically `ssh-agent` to set up and load whichever
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credentials you want for ssh connections.
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To enable it, add `ssh-agent` to your plugins:
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```zsh
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plugins=(... ssh-agent)
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```
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## Instructions
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To enable **agent forwarding support** add the following to your zshrc file:
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```zsh
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zstyle :omz:plugins:ssh-agent agent-forwarding on
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```
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To **load multiple identities** use the `identities` style, For example:
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```zsh
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zstyle :omz:plugins:ssh-agent identities id_rsa id_rsa2 id_github
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```
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To **set the maximum lifetime of the identities**, use the `lifetime` style.
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The lifetime may be specified in seconds or as described in sshd_config(5)
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(see _TIME FORMATS_). If left unspecified, the default lifetime is forever.
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```zsh
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zstyle :omz:plugins:ssh-agent lifetime 4h
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```
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## Credits
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Based on code from Joseph M. Reagle: http://www.cygwin.com/ml/cygwin/2001-06/msg00537.html
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Agent-forwarding support based on ideas from Florent Thoumie and Jonas Pfenniger
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@ -1,79 +1,42 @@
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#
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# INSTRUCTIONS
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#
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# To enable agent forwarding support add the following to
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# your .zshrc file:
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#
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# zstyle :omz:plugins:ssh-agent agent-forwarding on
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#
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# To load multiple identities use the identities style, For
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# example:
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#
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# zstyle :omz:plugins:ssh-agent identities id_rsa id_rsa2 id_github
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#
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# To set the maximum lifetime of the identities, use the
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# lifetime style. The lifetime may be specified in seconds
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# or as described in sshd_config(5) (see TIME FORMATS)
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# If left unspecified, the default lifetime is forever.
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#
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# zstyle :omz:plugins:ssh-agent lifetime 4h
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#
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# CREDITS
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#
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# Based on code from Joseph M. Reagle
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# http://www.cygwin.com/ml/cygwin/2001-06/msg00537.html
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#
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# Agent forwarding support based on ideas from
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# Florent Thoumie and Jonas Pfenniger
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#
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typeset _agent_forwarding _ssh_env_cache
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local _plugin__ssh_env
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local _plugin__forwarding
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function _start_agent() {
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local lifetime
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local -a identities
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function _plugin__start_agent()
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{
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local -a identities
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local lifetime
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zstyle -s :omz:plugins:ssh-agent lifetime lifetime
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# start ssh-agent and setup environment
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zstyle -s :omz:plugins:ssh-agent lifetime lifetime
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# start ssh-agent and setup environment
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/usr/bin/env ssh-agent ${lifetime:+-t} ${lifetime} | sed 's/^echo/#echo/' >! ${_plugin__ssh_env}
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chmod 600 ${_plugin__ssh_env}
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. ${_plugin__ssh_env} > /dev/null
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ssh-agent -s ${lifetime:+-t} ${lifetime} | sed 's/^echo/#echo/' >! $_ssh_env_cache
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chmod 600 $_ssh_env_cache
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. $_ssh_env_cache > /dev/null
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# load identies
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zstyle -a :omz:plugins:ssh-agent identities identities
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echo starting ssh-agent...
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# load identies
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zstyle -a :omz:plugins:ssh-agent identities identities
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/usr/bin/ssh-add $HOME/.ssh/${^identities}
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echo starting ssh-agent...
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ssh-add $HOME/.ssh/${^identities}
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}
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# Get the filename to store/lookup the environment from
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if (( $+commands[scutil] )); then
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# It's OS X!
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_plugin__ssh_env="$HOME/.ssh/environment-$(scutil --get ComputerName)"
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else
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_plugin__ssh_env="$HOME/.ssh/environment-$HOST"
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fi
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_ssh_env_cache="$HOME/.ssh/environment-$SHORT_HOST"
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# test if agent-forwarding is enabled
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zstyle -b :omz:plugins:ssh-agent agent-forwarding _plugin__forwarding
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if [[ ${_plugin__forwarding} == "yes" && -n "$SSH_AUTH_SOCK" ]]; then
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# Add a nifty symlink for screen/tmux if agent forwarding
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[[ -L $SSH_AUTH_SOCK ]] || ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USER-screen
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zstyle -b :omz:plugins:ssh-agent agent-forwarding _agent_forwarding
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elif [ -f "${_plugin__ssh_env}" ]; then
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# Source SSH settings, if applicable
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. ${_plugin__ssh_env} > /dev/null
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ps x | grep ${SSH_AGENT_PID} | grep ssh-agent > /dev/null || {
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_plugin__start_agent;
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}
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if [[ $_agent_forwarding == "yes" && -n "$SSH_AUTH_SOCK" ]]; then
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# Add a nifty symlink for screen/tmux if agent forwarding
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[[ -L $SSH_AUTH_SOCK ]] || ln -sf "$SSH_AUTH_SOCK" /tmp/ssh-agent-$USER-screen
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elif [[ -f "$_ssh_env_cache" ]]; then
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# Source SSH settings, if applicable
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. $_ssh_env_cache > /dev/null
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ps -o cmd -p $SSH_AGENT_PID | grep -q ssh-agent || {
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_start_agent
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}
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else
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_plugin__start_agent;
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_start_agent
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fi
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# tidy up after ourselves
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unfunction _plugin__start_agent
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unset _plugin__forwarding
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unset _plugin__ssh_env
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unset _agent_forwarding _ssh_env_cache
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unfunction _start_agent
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