Install Authorized Keys From Github

sshkeys.sh

#!/bin/bash

GITHUB_USERNAME="dongfg"
AUTHORIZED_KEYS_FILE="$HOME/.ssh/authorized_keys"
ALLOWED_KEY_TYPE="ssh-ed25519"


if [ ! -d "$HOME/.ssh" ]; then
  mkdir -p "$HOME/.ssh"
  chmod 700 "$HOME/.ssh"
fi


PUB_KEYS=$(curl -s "https://github.com/${GITHUB_USERNAME}.keys" | grep "^$ALLOWED_KEY_TYPE")

if [ -z "$PUB_KEYS" ]; then
  echo "No valid '$ALLOWED_KEY_TYPE' public keys found for GitHub user: $GITHUB_USERNAME"
  exit 1
fi

echo "Processing public keys of type '$ALLOWED_KEY_TYPE' for user '$GITHUB_USERNAME'..."
ADDED_COUNT=0
while read -r KEY; do
  if grep -Fxq "$KEY" "$AUTHORIZED_KEYS_FILE"; then
    echo "Key already exists: $KEY"
  else
    echo "$KEY" >> "$AUTHORIZED_KEYS_FILE"
    echo "Key added: $KEY"
    ADDED_COUNT=$((ADDED_COUNT + 1))
  fi
done <<< "$PUB_KEYS"

chmod 600 "$AUTHORIZED_KEYS_FILE"

if [ $ADDED_COUNT -eq 0 ]; then
  echo "No new keys were added."
else
  echo "$ADDED_COUNT key(s) of type '$ALLOWED_KEY_TYPE' added to $AUTHORIZED_KEYS_FILE."
fi

echo "Done."