├── load
└── README.md


/load:
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 1 | #!/usr/bin/env bash
 2 | 
 3 | set -e
 4 | 
 5 | HOMETIME="18:00:00"
 6 | HOURS="$1"
 7 | LASTPASS_NAME="Personal/GitHub SSH key"
 8 | PRIVATE_KEY="key"
 9 | OWNER="Josh"
10 | 
11 | main() {
12 |   delete_all_ssh_identities
13 |   save_private_key_to_file
14 |   add_private_key
15 | }
16 | 
17 | delete_all_ssh_identities() {
18 |   ssh-add -D
19 | }
20 | 
21 | save_private_key_to_file() {
22 |   delete_private_key_file
23 |   lpass show "$LASTPASS_NAME" --notes > "$PRIVATE_KEY"
24 |   chmod 400 "$PRIVATE_KEY"
25 | }
26 | 
27 | add_private_key() {
28 |   if [ -z "$HOURS" ]
29 |   then
30 |     add_private_key_until_hometime
31 |   else
32 |     add_private_key_for_x_hours
33 |   fi
34 | }
35 | 
36 | add_private_key_until_hometime() {
37 |   local now="$(date +%s)"
38 |   local until="$( date -j -f "%T" $HOMETIME +%s )"
39 |   local seconds_remaining="$( expr $until - $now )"
40 | 
41 |   if [ "$seconds_remaining" -lt 1 ]
42 |   then
43 |     echo "$HOMETIME is history. Go home!"
44 |     exit 1
45 |   else
46 |     echo "Adding $OWNER's private key until $HOMETIME..."
47 |     ssh-add -t "$seconds_remaining" "$PRIVATE_KEY"
48 |   fi
49 | }
50 | 
51 | add_private_key_for_x_hours() {
52 |   echo "Adding $OWNER's private key for $HOURS hours..."
53 |   ssh-add -t "${HOURS}h" "$PRIVATE_KEY"
54 | }
55 | 
56 | delete_private_key_file() {
57 |   rm -f "$PRIVATE_KEY"
58 | }
59 | 
60 | trap delete_private_key_file EXIT
61 | main
62 | 


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/README.md:
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 1 | # Load an SSH key for the day using LastPass CLI
 2 | 
 3 | At [Pivotal](https://pivotal.io) we share Mac workstations, so we typically log in for the day.
 4 | 
 5 | I used to carry my SSH key on a USB stick. Now it's a backup and I load my SSH key using LastPass.
 6 | 
 7 | ## Prerequisites
 8 | 
 9 | 1. [LastPass](https://lastpass.com/) account
10 | 1. LastPass CLI: `brew install lastpass-cli`
11 | 
12 | ## Set up
13 | 
14 | 1. Create a new SSH key; GitHub has a [decent guide](https://help.github.com/articles/generating-an-ssh-key/)
15 | 
16 | 1. Put the private key in the notes field of a LastPass secure note, e.g. "Personal/GitHub SSH key"
17 | 
18 | 1. Customise the [load script](https://github.com/jamesjoshuahill/lastpass-ssh-key/blob/master/load), with your own variables
19 | 
20 | 1. Put your custom load script in the notes field of another LastPass secure note, e.g. "Personal/Load GitHub SSH Key"
21 | 
22 | ## Usage
23 | 
24 | ```bash
25 | lpass login $USERNAME
26 | 
27 | # Load your SSH key until hometime!
28 | bash <(lpass show 'Personal/Load GitHub SSH Key' --notes)
29 | 
30 | # Or, load your SSH key for 2 hours!
31 | bash <(lpass show 'Personal/Load GitHub SSH Key' --notes) 2
32 | ```
33 | 
34 | ## Bash profile
35 | 
36 | For convenience we've added a function to our bash profile:
37 | 
38 | ```bash
39 | load_ssh_key() {
40 |   if lpass status; then
41 |     bash <(lpass show 'Personal/Load GitHub SSH Key' --notes) "$1"
42 |   fi
43 | }
44 | ```
45 | 


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