Add openpilot tools

tools/ssh/README.md

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+# SSH
+
+## Quick Start
+
+In order to SSH into your device, you'll need a GitHub account with SSH keys. See this [GitHub article](https://docs.github.com/en/github/authenticating-to-github/connecting-to-github-with-ssh) for getting your account setup with SSH keys.
+
+* Enable SSH in your device's settings
+* Enter your GitHub username in the device's settings
+* Connect to your device
+  * Username: `comma`
+  * Port: `22` or `8022`
+
+Here's an example command for connecting to your device using its tethered connection:<br />
+`ssh comma@192.168.43.1`
+
+For doing development work on device, it's recommended to use [SSH agent forwarding](https://docs.github.com/en/developers/overview/using-ssh-agent-forwarding).
+
+## Notes
+
+The public keys are only fetched from your GitHub account once. In order to update your device's authorized keys, you'll need to re-enter your GitHub username.
+
+The `id_rsa` key in this directory only works while your device is in the setup state with no software installed. After installation, that default key will be removed.
+
+See the [community wiki](https://github.com/commaai/openpilot/wiki/SSH) for more detailed instructions and information.
+
+# Connecting to ssh.comma.ai
+SSH into your comma device from anywhere with `ssh.comma.ai`. Requires a [comma prime subscription](https://comma.ai/connect).
+
+## Setup
+
+With software version 0.6.1 or newer, enter your GitHub username on your device under Developer Settings. Your GitHub authorized public keys will become your authorized SSH keys for `ssh.comma.ai`. You can add any additional keys in `/system/comma/home/.ssh/authorized_keys.persist`.
+
+## Recommended .ssh/config
+
+With the below SSH configuration, you can type `ssh comma-{dongleid}` to connect to your device through `ssh.comma.ai`.<br />
+For example: `ssh comma-ffffffffffffffff`
+
+```
+Host comma-*
+  Port 22
+  User comma
+  IdentityFile ~/.ssh/my_github_key
+  ProxyCommand ssh %h@ssh.comma.ai -W %h:%p
+Host ssh.comma.ai
+  Hostname ssh.comma.ai
+  Port 22
+  IdentityFile ~/.ssh/my_github_key
+```
+
+## One-off connection
+
+```
+ssh -i ~/.ssh/my_github_key -o ProxyCommand="ssh -i ~/.ssh/my_github_key -W %h:%p -p %p %h@ssh.comma.ai" comma@ffffffffffffffff
+```
+(Replace `ffffffffffffffff` with your dongle_id)
+
+## ssh.comma.ai host key fingerprint
+
+```
+Host key fingerprint is SHA256:X22GOmfjGb9J04IA2+egtdaJ7vW9Fbtmpz9/x8/W1X4
++---[RSA 4096]----+
+|                 |
+|                 |
+|        .        |
+|         +   o   |
+|        S = + +..|
+|         + @ = .=|
+|        . B @ ++=|
+|         o * B XE|
+|         .o o OB/|
++----[SHA256]-----+
+```