try ssl-encrypted mails

action.sh

@@ -37,6 +37,10 @@ SYSUSER=$(whoami)
 NOTES="$HOME/$SYSUSER-Notes.txt"
 NOTESTMP=.Notes.txt.tmp
 
+MAILTYPE=mailsendenc   # Use mailsend for plaintext, mailsendenc for SSL-encrypted details
+SSLKEY=ssl.key         # Only needed when using mailsendenc
+MAILTMP=.mail.txt.tmp
+
 ## FUNCTIONS
 function checkaction {
   REGEX="^adduser$|^changepw$|^listusers$|^userdetail$|^deluser$|^sizeall$|^sizeuser$|^viewdata$"
@@ -80,7 +84,6 @@ function mailsend {
   SUBJECT="[$DOMAIN] $1";
   MSGBODY1="$2"
   MSGBODY2="$3"
-  TMP=`mktemp`
 
   printf '%s\n' "From: $FREMAIL
 To: $TOEMAIL
@@ -90,9 +93,56 @@ Subject: $SUBJECT
 $MSGBODY1
 
 $MSGBODY2
-" > $TMP
-  cat $TMP | "$SENDMAILPATH" -t;
-  rm $TMP;
+" > $MAILTMP
+  cat $MAILTMP | "$SENDMAILPATH" -t;
+  rm $MAILTMP;
+}
+
+function mailsendenc {
+  
+  if [ ! -e $SSLKEY ]; then
+    #echo "Encryption key \"$SSLKEY\" is not available. Aborting."
+    #exit 1
+    
+    openssl genrsa -out $SSLKEY 2048
+  fi
+  
+  TOEMAIL="$TOEMAIL";
+  FREMAIL="$FREMAIL";
+  SUBJECT="[$DOMAIN] $1";
+  MSGBODY1="$2"
+  MSGBODY2=$(echo $3 | openssl rsautl -inkey $SSLKEY -encrypt > $MAILTMP.crypt)
+  BOUNDARY="ZZafgwejwepfgkl.9453x1q"
+  ATTACHMENT=$(base64 $MAILTMP.crypt)
+
+printf '%s\n' "From: $FREMAIL
+To: $TOEMAIL
+Reply-To: $FREMAIL
+Subject: $SUBJECT
+Mime-Version: 1.0
+Content-Type: multipart/mixed; boundary=\"$BOUNDARY\"
+
+--${BOUNDARY}
+Content-Type: text/plain; charset=\"us-ascii\"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: inline
+
+$MSGBODY1
+
+$MSGBODY2
+
+--${BOUNDARY}
+Content-Type: text/plain
+Content-Transfer-Encoding: base64
+Content-Disposition: attachment; filename=\"message.txt.crypt\"
+
+$ATTACHMENT
+
+--${BOUNDARY}
+
+" > $MAILTMP
+  cat $MAILTMP | "$SENDMAILPATH" -t;
+  rm $MAILTMP;
 }
 
 ## FIRST CHECKS