select which transport to use by default

ssh-notify/README.md

@@ -29,6 +29,15 @@ vim /etc/ssh-notify/config.conf # edit in place
 chmod 600 /etc/ssh-notify/config.conf
 ```
 
+**Configuration Options:**
+
+- `EMAIL_RECIPIENT`: Email address to receive notifications
+- `EMAIL_API_ENDPOINT`: API endpoint for sending emails
+- `TELEGRAM_BOT_TOKEN`: Your Telegram bot token
+- `TELEGRAM_CHAT_ID`: Telegram chat ID to receive notifications
+- `PAM_TRANSPORTS`: Space-separated list of transports for PAM mode (e.g., `"telegram email"`, `"telegram"`, `"email"`)
+- `LOG_FILE`: Path to log file (default: `/var/log/ssh-notify.log`)
+
 ### 3. PAM configuration
 
 ```sh
@@ -54,13 +63,13 @@ The `ssh-notify.logrotate` tells `logrotate` to rotate `/var/log/ssh‑notify.lo
 
 Feel free to contact me for collaboration on anything!
 
-Yiğid BALABAN, <[fyb@fybx.dev][llmail]>
+Yiğid BALABAN, <[hey@yigid.dev][llmail]>
 
 [My Website][llwebsite] • [X][llx] • [LinkedIn][lllinkedin]
 
 2024
 
-[llmail]: mailto:fyb@fybx.dev
+[llmail]: mailto:hey@yigid.dev
-[llwebsite]: https://fybx.dev
+[llwebsite]: https://yigid.dev
 [llx]: https://x.com/fybalaban
-[lllinkedin]: https://linkedin.com/in/fybx
+[lllinkedin]: https://linkedin.com/in/yigid

ssh-notify/example.conf

@@ -6,5 +6,14 @@ EMAIL_API_ENDPOINT="https://mail-proxy.example.org/api/mail"
 TELEGRAM_BOT_TOKEN=""
 TELEGRAM_CHAT_ID=""
 
+# Transport Configuration
+# Space-separated list of transports to use when PAM triggers the script
+# Valid options: email telegram
+# Examples:
+#   PAM_TRANSPORTS="telegram email"  # both
+#   PAM_TRANSPORTS="telegram"        # only Telegram
+#   PAM_TRANSPORTS="email"           # only Email
+PAM_TRANSPORTS="telegram email"
+
 # Log file for the notifier script 
 LOG_FILE="/var/log/ssh-notify.log"

ssh-notify/ssh-notify.sh

@@ -91,9 +91,47 @@ else
     exit 1
 fi
 
-# Ensure required config variables are set
+# Set default for PAM_TRANSPORTS if not specified
-if [[ -z "$EMAIL_RECIPIENT" || -z "$EMAIL_API_ENDPOINT" || -z "$TELEGRAM_BOT_TOKEN" || -z "$TELEGRAM_CHAT_ID" || -z "$LOG_FILE" ]]; then
+if [[ -z "$PAM_TRANSPORTS" ]]; then
-    ERR_MSG="ssh-notify Error: One or more required variables are missing in $CONFIG_FILE."
+    PAM_TRANSPORTS="telegram email"
+fi
+
+# Validate and parse PAM_TRANSPORTS
+ENABLE_EMAIL=false
+ENABLE_TELEGRAM=false
+for transport in $PAM_TRANSPORTS; do
+    case "$transport" in
+        email)
+            ENABLE_EMAIL=true
+            ;;
+        telegram)
+            ENABLE_TELEGRAM=true
+            ;;
+        *)
+            ERR_MSG="ssh-notify Warning: Unknown transport '$transport' in PAM_TRANSPORTS. Valid options: email, telegram"
+            echo "$ERR_MSG" | systemd-cat -p warning -t 'ssh-notify'
+            echo "$ERR_MSG" >&2
+            ;;
+    esac
+done
+
+# Ensure required config variables are set based on enabled transports
+if [[ "$ENABLE_EMAIL" == true && ( -z "$EMAIL_RECIPIENT" || -z "$EMAIL_API_ENDPOINT" ) ]]; then
+    ERR_MSG="ssh-notify Error: Email transport enabled but EMAIL_RECIPIENT or EMAIL_API_ENDPOINT missing in $CONFIG_FILE."
+    echo "$ERR_MSG" | systemd-cat -p err -t 'ssh-notify'
+    echo "$ERR_MSG" >&2
+    exit 1
+fi
+
+if [[ "$ENABLE_TELEGRAM" == true && ( -z "$TELEGRAM_BOT_TOKEN" || -z "$TELEGRAM_CHAT_ID" ) ]]; then
+    ERR_MSG="ssh-notify Error: Telegram transport enabled but TELEGRAM_BOT_TOKEN or TELEGRAM_CHAT_ID missing in $CONFIG_FILE."
+    echo "$ERR_MSG" | systemd-cat -p err -t 'ssh-notify'
+    echo "$ERR_MSG" >&2
+    exit 1
+fi
+
+if [[ -z "$LOG_FILE" ]]; then
+    ERR_MSG="ssh-notify Error: LOG_FILE missing in $CONFIG_FILE."
     echo "$ERR_MSG" | systemd-cat -p err -t 'ssh-notify'
     echo "$ERR_MSG" >&2
     exit 1
@@ -162,8 +200,8 @@ send_telegram() {
         [[ "$TEST_TYPE" == "both" || "$TEST_TYPE" == "email" ]] && send_email
         [[ "$TEST_TYPE" == "both" || "$TEST_TYPE" == "telegram" ]] && send_telegram
     else
-        send_email
+        [[ "$ENABLE_EMAIL" == true ]] && send_email
-        send_telegram
+        [[ "$ENABLE_TELEGRAM" == true ]] && send_telegram
     fi
 ) &