Bot that posts SSH logins to Telegram

sshtelegram.sh

#!/bin/bash

KEY="<your bot token>"

URL="https://api.telegram.org/bot$KEY/sendMessage"

TARGET="<your chat ID>" # Telegram ID of the conversation with the bot, get it from /getUpdates API

TEXT="User *$PAM_USER* logged in on *$HOSTNAME* at $(date '+%Y-%m-%d %H:%M:%S %Z')
Remote host: $PAM_RHOST
Remote user: $PAM_USER
Service: $PAM_SERVICE
TTY: $PAM_TTY"

PAYLOAD="chat_id=$TARGET&text=$TEXT&parse_mode=Markdown&disable_web_page_preview=true"

# Run in background so the script could return immediately without blocking PAM
curl -s --max-time 10 --retry 5 --retry-delay 2 --retry-max-time 10 -d "$PAYLOAD" $URL > /dev/null 2>&1 &