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ssh: remove persistent socket; use macOS Keychain #1394

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slarew
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@slarew slarew commented Jul 22, 2017

Proposed Changes

  • Remove persistent SSH auth socket.
  • Make ps|grep more robust and POSIX compliant.
  • On macOS, use -A switch to "add identities to the agent using any
    passphrase stored in the user's keychain."

@belak
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belak commented Aug 14, 2017

Looks like there's a conflict now. Would you mind fixing that?

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slarew commented Aug 14, 2017

I think I fixed the conflict.

@jeffwidman jeffwidman requested review from indrajitr and belak August 29, 2017 21:40
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Seems both useful and straightforward to me, but I'd like another pair of eyes on it before merging.

@belak
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belak commented Aug 29, 2017

Does this still work on linux and does it connect to the same agent between different shell sessions? I'm not very familiar with this, unfortunately.

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slarew commented Aug 29, 2017 via email

@jeffwidman
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@indrajitr / @johnpneumann if either of you get a chance, can you take a look? I am in the same boat as @belak, that it looks good but I'm not very familiar with this and there's a number of changes in here.

Alternatively, the consequences of this breaking probably aren't the end of the world as it's unlikely to introduce a security risk, just a breakage risk so we'd hear about it immediately and fix it, so personally I'm fine with merging. Will give the other folks a day or two to weigh in though...

@johnpneumann
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I'll take a look tonight

@johnpneumann johnpneumann self-assigned this Aug 30, 2017
@crivotz
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crivotz commented Aug 31, 2017

I tested the modification on Debian v9.1 - zsh 5.3.1 and found no problems (with and without ssh-askpass)

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Try to find an elegant way of ensuring that users who define their ssh keys, within their .zpreztorc and that they can use the keychain as well. I was able to do it by checking the output of ssh-add -l again, but it's not DRY.

# Load identities.
if ssh-add -l 2>&1 | grep -q 'The agent has no identities'; then
zstyle -a ':prezto:module:ssh:load' identities '_ssh_identities'
# Check for Linux system and ssh-askpass presence
if [[ "$OSTYPE" == linux* ]] && [[ ! -a /usr/lib/ssh/x11-ssh-askpass ]]; then
ssh-add "${_ssh_identities:+$_ssh_dir/${^_ssh_identities[@]}}" 2> /dev/null
elif [[ "$OSTYPE" == darwin* ]]; then
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The problem I have with this is what if the user doesn't put their keys into the keychain and simply define them within the identities? What happens is that the identities that are defined are ignored entirely, so they're now being forced to put their keys into their keychain.

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I believe I have addressed your concern with 8430fb8.

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@johnpneumann Could you review my changes in 8430fb8 to see if that fixes your concerns?

* Remove persistent SSH auth socket.
* Make ps|grep more robust and POSIX compliant.
* On macOS, use `-A` switch to "add identities to the agent using any
passphrase stored in the user's keychain."
If the user defines identities in `:prezto:module:ssh:load`, always try
to load them, even on macOS.  On macOS, also try to load Keychain
managed identities. (Assume if a user adds an identity to Keychain then
the use would want those identities automatically loaded.)
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5 participants