Changes to cron, register-handler, settings and templates:

- Cron now notifies user what happened (key successfully added/deleted or error)
- More options to customize templates
- Separating concepts in settings (S/MIME, templates)
- Register-handler now only informs on failed PGP submissions (reduce mails to user and false positive mails)

README.md

@@ -1,5 +1,7 @@
 # gpg-mailgate
 
+**Please note: This fork is currently WIP. It is not recommended for use at the moment.**
+
 gpg-mailgate is a content filter for Postfix that automatically encrypts unencrypted incoming email using PGP or S/MIME for select recipients.
 
 For installation instructions, please refer to the included INSTALL file.
@@ -18,7 +20,7 @@ This is forked from the original project at http://code.google.com/p/gpg-mailgat
 
 # Authors
 
-This is a combined work of many developers and contributor:s
+This is a combined work of many developers and contributors:
 
 * mcmaster <mcmaster@aphrodite.hurricanelabs.rsoc>
 * Igor Rzegocki <ajgon@irgon.com> - [GitHub](https://github.com/ajgon/gpg-mailgate)
@@ -37,5 +39,6 @@ This is a combined work of many developers and contributor:s
 * clean up code
 * rewrite templates for register-handler
 * rewrite and improve installation instructions
+* rewrite readme of gpg-mailgate-web in markdown
 * rename from gpg-mailgate to openpgp-s-mime-mailgate or something.....
 * even more magical stuff

cron_templates/keyDeleted.md

@@ -0,0 +1 @@
+Your PGP key has been deleted from our gateway. From now on you will receive mails from us unencrypted.

cron_templates/registrationError.md

@@ -0,0 +1,3 @@
+Your PGP key could not be validated. Please try again with a valid key.
+
+Any valid keys from you submitted to the gateway before are now deleted.

cron_templates/registrationSuccess.md

@@ -0,0 +1 @@
+Your PGP key has been imported successfully. Don't be worried if this mail is not encrypted. The following mails will be encrypted.

gpg-mailgate-web/cron.py

@@ -23,7 +23,9 @@ from ConfigParser import RawConfigParser
 import GnuPG
 import MySQLdb
 import smtplib
+import markdown
 from email.MIMEText import MIMEText
+from email.mime.multipart import MIMEMultipart
 
 def appendLog(msg):
 	if cfg.has_key('logging') and cfg['logging'].has_key('file'):
@@ -31,15 +33,20 @@ def appendLog(msg):
 		log.write(msg + "\n")
 		log.close()
 
-def send_msg( mailsubject, mailbody, recipients = None ):
-	msg = MIMEText(mailbody)
-	msg["From"] = cfg['smime']['register_email']
+def send_msg( mailsubject, messagefile, recipients = None ):
+	mailbody = file( cfg['cron']['mail_templates'] + "/" + messagefile).read()
+	msg = MIMEMultipart("alternative")
+
+	msg["From"] = cfg['cron']['notification_email']
 	msg["To"] = recipients
 	msg["Subject"] = mailsubject
 	
+	msg.attach(MIMEText(mailbody, 'plain'))
+	msg.attach(MIMEText(markdown.markdown(mailbody), 'html'))
+	
 	relay = ("127.0.0.1", 10028)
 	smtp = smtplib.SMTP(relay[0], relay[1])
-	smtp.sendmail( cfg['smime']['register_email'], recipients, msg.as_string() )
+	smtp.sendmail( cfg['cron']['notification_email'], recipients, msg.as_string() )
 
 # Read configuration from /etc/gpg-mailgate.conf
 _cfg = RawConfigParser()
@@ -69,15 +76,18 @@ if cfg.has_key('database') and cfg['database'].has_key('enabled') and cfg['datab
 				GnuPG.add_key(cfg['gpg']['keyhome'], row[0]) # import the key to gpg
 				cursor.execute("UPDATE gpgmw_keys SET status = 1 WHERE id = %s", (row[1],)) # mark key as accepted
 				appendLog('Imported key from <' + row[2] + '>')
-				send_msg( "PGP key registration successful", "Your PGP key has been imported successfully. Don't be worried if this mail is not encrypted. The following mails will be encrypted.", row[2] )
+				if cfg['cron'].has_key('send_email') and cfg['cron']['send_email'] == 'yes':
+					send_msg( "PGP key registration successful", "registrationSuccess.md", row[2] )
 			else:
 				cursor.execute("DELETE FROM gpgmw_keys WHERE id = %s", (row[1],)) # delete key
 				appendLog('Import confirmation failed for <' + row[2] + '>')
-				send_msg( "PGP key registration failed", "Your PGP key could not be validated. Please try again with a valid key.", row[2] )
+				if cfg['cron'].has_key('send_email') and cfg['cron']['send_email'] == 'yes':
+					send_msg( "PGP key registration failed", "registrationError.md", row[2] )
 		else:
 			# delete key so we don't continue processing it
 			cursor.execute("DELETE FROM gpgmw_keys WHERE id = %s", (row[1],))
-			send_msg( "PGP key deleted", "Your PGP key has been deleted from our gateway. From now on you will receive mails from us unencrypted.", row[2])
+			if cfg['cron'].has_key('send_email') and cfg['cron']['send_email'] == 'yes':
+				send_msg( "PGP key deleted", "keyDeleted.md", row[2])
 
 		connection.commit()
 

gpg-mailgate.conf.sample

@@ -16,8 +16,19 @@ keyhome = /var/gpg/.gnupg
 [smime]
 # the directory for the S/MIME certificate files
 cert_path = /var/smime/certs
+
+[mailregister]
+# settings for the register-handler
 register_email = register@yourdomain.tld
-mail_templates = /var/smime/templates
+mail_templates = /var/gpgmailgate/register_templates
+# URL to webpanel. The server should be able to reach it
+webpanel_url = http://yourdomain.tld
+
+[cron]
+# settings for the gpgmw cron job
+send_email = yes
+notification_email = gpg-mailgate@yourdomain.tld
+mail_templates = /var/gpgmailgate/cron_templates
 
 [logging]
 # For logging to syslog. 'file = syslog', otherwise use path to the file.

register-handler.py

@@ -45,10 +45,11 @@ if __name__ == "__main__":
 				sign_type = 'smime'
 				sign_part = msg_part
 				break
-			elif msg_part.get_content_type().lower() == "application/pgp-keys":
-				sign_type = 'pgp'
-				sign_part = msg_part.get_payload()
-				break
+			# This may cause that a non ASCII-armored key will be seen as valid. Other solution is not that efficient though
+			#elif msg_part.get_content_type().lower() == "application/pgp-keys":
+			#	sign_type = 'pgp'
+			#	sign_part = msg_part.get_payload()
+			#	break
 			elif "-----BEGIN PGP PUBLIC KEY BLOCK-----" in msg_part.get_payload() and "-----END PGP PUBLIC KEY BLOCK-----" in msg_part.get_payload():
 				msg_content = msg_part.get_payload()
 				start = msg_content.find("-----BEGIN PGP PUBLIC KEY BLOCK-----")
@@ -60,16 +61,16 @@ if __name__ == "__main__":
 		if sign_part == None:
 			log("Unable to find PKCS7 signature or public PGP key in registration email")
 
-			failure_msg = file( cfg['smime']['mail_templates'] + "/registrationError.md").read()
+			failure_msg = file( cfg['mailregister']['mail_templates'] + "/registrationError.md").read()
 			msg = MIMEMultipart("alternative")
-			msg["From"] = cfg['smime']['register_email']
+			msg["From"] = cfg['mailregister']['register_email']
 			msg["To"] = from_addr
 			msg["Subject"] = "S/MIME / OpenPGP registration failed"
 
 			msg.attach(MIMEText(failure_msg, 'plain'))
 			msg.attach(MIMEText(markdown.markdown(failure_msg), 'html'))
 
-			send_msg(msg, cfg['smime']['register_email'], [from_addr])
+			send_msg(msg, cfg['mailregister']['register_email'], [from_addr])
 			sys.exit(0)
 		
 		if sign_type == 'smime':
@@ -93,27 +94,30 @@ if __name__ == "__main__":
 			signing_cert = signers[0]
 
 			signing_cert.save(os.path.join(CERT_PATH, from_addr))
+					
+			# format in user-specific data
+			# sending success mail only for S/MIME as GPGMW handles this on its own
+			success_msg = file(cfg['mailregister']['mail_templates']+"/registrationSuccess.md").read()
+			success_msg = success_msg.replace("[:FROMADDRESS:]",from_addr)
+			
+			msg = MIMEMultipart("alternative")
+			msg["From"] = cfg['mailregister']['register_email']
+			msg["To"] = from_addr
+			msg["Subject"] = "S/MIME certificate registration succeeded"
+
+			msg.attach(MIMEText(success_msg, 'plain'))
+			msg.attach(MIMEText(markdown.markdown(success_msg), 'html'))
 			
+			send_msg(msg, cfg['mailregister']['register_email'], [from_addr])
+			
+			log("S/MIME Registration succeeded")
 		elif sign_type == 'pgp':
-			 # send POST to localost on port 11371 which points to our HTTP registration page
+			# send POST to gpg-mailgate webpanel
 			sig = sign_part
 			payload = {'email': from_addr, 'key': sig}
-			r = requests.post("http://127.0.0.1:11371", data=payload)
-
-		# format in user-specific data
-		success_msg = file(cfg['smime']['mail_templates']+"/registrationSuccess.md").read()
-		success_msg = success_msg.replace("[:FROMADDRESS:]",from_addr)
-
-		msg = MIMEMultipart("alternative")
-		msg["From"] = cfg['smime']['register_email']
-		msg["To"] = from_addr
-		msg["Subject"] = "S/MIME / OpenPGP key registration succeeded"
-
-		msg.attach(MIMEText(success_msg, 'plain'))
-		msg.attach(MIMEText(markdown.markdown(success_msg), 'html'))
-
-		log("Registration succeeded")
-		send_msg(msg, cfg['smime']['register_email'], [from_addr])
+			r = requests.post(cfg['mailregister']['webpanel_url'], data=payload)
+			
+			log("PGP registration is handed over to GPGMW")
 #	except:
 #		log("Registration exception")
 #		sys.exit(0)

register_templates/registrationError.md

@@ -0,0 +1,4 @@
+Could not register a S/MIME certificate or PGP key.
+
+For S/MIME make sure your message is signed.
+For PGP make sure you attach your ASCII-armored public key to the email.

register_templates/registrationSuccess.md

@@ -1,3 +1 @@
 Registration was a success. A signature was found in your message, and your S/MIME certificate was saved.
-
-Mailencrypt.net keeps no logs of message content or metadata (such as To, From, or IP address).

templates/registrationError.md

@@ -1,3 +0,0 @@
-The mailencrypt registration attempt failed. Most likely, the message was not signed, or a application/pkcs7-signature section could not be found.
-
-Be sure that you're sending your email with signing turned on.