Initial commit

2022-05-15 21:39:39 +02:00
commit 81a6b562b6
50 changed files with 3837 additions and 0 deletions
--- a/tools/crypt_maildir.sh
+++ b/tools/crypt_maildir.sh
@ -0,0 +1,114 @@
+#!/bin/bash
+#
+# Encrypt/Decrypt/Check emails with Dovecot's mail-crpyt-plugin
+# This script will encrypt/decrypt emails in-place
+# Please read: https://wiki.dovecot.org/Design/Dcrypt and https://wiki2.dovecot.org/Plugins/MailCrypt
+#
+# Update variables with your keys and patch otherwise you will loose data!
+#
+# I take no responsibility for data loos this script may cause
+#
+# IMPORTANT:
+# BEFORE USE ADD THIS MAGIC(5) TO YOUR LOCAL MAGIC DATABASE:
+#/etc/magic and /etc/magic.mime:
+#0	string	CRYPTED	MailCrypt
+#!:mime application/mail-crypt
+
+count=0
+processed=0
+tempfile=$(mktemp)
+
+uid=5000
+gid=5000
+maildir_path=$(pwd)
+private_key_path=/etc/dovecot/ecprivkey.pem
+public_key_path=/etc/dovecot/ecpubkey.pem
+
+if [ "$1" == "" ]; then
+    echo "Missing user folder"
+    exit 1
+fi
+
+case $2 in
+  encrypt) mode=encrypt; text_d="Encrypting"
+  ;;
+  decrypt) mode=decrypt; text_d="Decrypting"
+  ;;
+  check) mode=check; text_d="Checking"
+  ;;
+  *)  echo "Unknown mode. Modes: [encrypt|decrypt|check]"; exit 1
+esac
+
+_encrypt(){
+  touch -r "$mailmessage" $tempfile
+  doveadm fs put compress gz:9:crypt:private_key_path=$private_key_path:public_key_path=$public_key_path:posix:prefix=$maildir_path/$userdir/ "$mailmessage" "$mailmessage"
+  touch -r $tempfile "$mailmessage"
+  chown $uid:$gid "$mailmessage"
+}
+
+_decrypt(){
+  touch -r "$mailmessage" $tempfile
+  doveadm fs get compress maybe-gz:9:crypt:private_key_path=$private_key_path:public_key_path=$public_key_path:posix:prefix=$maildir_path/$userdir/ "$mailmessage" > .tempdecrypted
+  mv .tempdecrypted "$mailmessage"
+  touch -r $tempfile "$mailmessage"
+  chmod 0600 "$mailmessage"
+  chown $uid:$gid "$mailmessage"
+}
+
+userdir="$1"
+
+if [ ! -d $maildir_path/$userdir/ ];then
+  echo "Folder do not exist: $maildir_path/$userdir/"
+  exit 1
+fi
+
+totalfiles=$(find $maildir_path/$userdir/ -type f  ! -iname 'dovecot*' ! -iname 'maildirfolder' ! -iname 'subscriptions' | wc -l | xargs)
+echo
+echo "$text_d mails in $maildir_path/$userdir/"
+echo "Found $totalfiles, processing..."
+echo ". plain text" 
+echo "+ gzipped "
+echo "* encrypted "
+echo "< encrypting"
+echo "> decrypting"
+echo
+
+# operate in context
+cd $maildir_path/$userdir/
+for mailmessage in `find . -type f  ! -iname 'dovecot*' ! -iname 'maildirfolder' ! -iname 'subscriptions'`; do
+  message=$(basename "$mailmessage")
+  if [ ! -f "$mailmessage" ];then
+    continue;
+  fi;
+  testfiletype=$(file -b --mime-type "$mailmessage")
+  if [ "$testfiletype" != "application/mail-crypt" ]  ;then
+      if [ "$testfiletype" != "application/gzip" ]  ;then
+          echo -n "."
+      else
+          echo -n "+"
+      fi
+      if [ "$mode" == "encrypt" ];then
+        _encrypt
+        echo -n "<"
+      fi
+    else
+      echo -n "*"
+      if [ "$mode" == "decrypt" ];then
+        _decrypt
+        echo -n ">"
+      fi
+  fi
+  count=$(($count + 1))
+  processed=$(($processed + 1))
+  if [ $count == 10 ];then
+    echo -n "$processed/$totalfiles"
+    echo -e
+    count=0
+  fi
+
+
+done
+
+rm -f $tempfile
+
+echo -e "\n\nDone"