End to End Encryption for using K-9 Mail/Open Keychain

[DanielLester83]

I made a simple bodged example of how I made a "encrypt, sign and forward everything to 1 email" setup for reading on K-9 Mail/Open Keychain which didn't like zeyple's attachment style of encryption. I used "os.popen" instead of the gpg module (which seems lacking). (Using curl with Gmail also requires allowing less secure transfers for the account which isn't ideal).

Perhaps this will be helpful in making a more robust solution as I'm not really familiar with python.

/usr/local/bin/zeyple.py

#!/usr/bin/env python                                                                               
# -*- coding: utf-8 -*-                                                                             
import sys                                                                                          
import os
                                                                          
try:                                                                                                    
     from configparser import SafeConfigParser  # Python 3
except ImportError:
     from ConfigParser import SafeConfigParser  # Python 2
                                                                                                           
# Boiler plate to avoid dependency on six                                                           
# BBB: Python 2.7 support                                                                           
PY3K = sys.version_info > (3, 0)

#if __name__ == '__main__':                                                                         
if True:                                                                                                
    recipients = sys.argv[1:]
    # BBB: Python 2.7 support
    binary_stdin = sys.stdin.buffer if PY3K else sys.stdin
                                              
    message = binary_stdin.read()

    f = open("/home/zeyple/.gnupg/message.enc", "w")

    text = message                                                                                      
    posa = text.find("Subject: ")
    subject = text[posa:].split("\n",1)                                                                 
    subject = subject[0]

    text = text.partition("\n\n")          
                                                             
    f.write( text[2] )                                                                                 
    f.close()                                                                                           

    os.popen("gpg --homedir /home/zeyple/.gnupg --batch --yes  --passphrase=CERTPASSGOESHERE --pinentry-mode loopback --always-trust -ea --sign -u \"John Smith <[email protected]>\" -r \"John Smith <[email protected]>\" -o - /home/zeyple/.gnupg/message.enc > /home/zeyple/.gnupg/message2.enc")

 #Needed for curl
    os.popen('sed -i -E \":a;N;$!ba;s/\r{0,1}\n/\\n/g\" /home/zeyple/.gnupg/message2.enc')

    f = open("/home/zeyple/.gnupg/message2.enc", "r")

    text = f.read()                                                                                    
    text = text.partition("-----")
    body = text[2]                                                                                      

    f.close()

    os.popen("echo \"" + subject + " \n\n-----" + body + "\" | /usr/bin/cur l--retry 5 --url smtps://smtp.gmail.com:465 --mail-from [email protected] --mail-rcpt [email protected] --user [email protected]:fakeemailpassword --ssl-reqd --insecure --silent --ciphers ECDHE-RSA-AES128-GCM-SHA256 -T -")

    os.remove('/home/zeyple/.gnupg/message.enc')                                                        
    os.remove('/home/zeyple/.gnupg/message2.enc')