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authorkali <kali@leap.se>2013-01-30 10:42:32 +0900
committerkali <kali@leap.se>2013-01-30 10:42:32 +0900
commitededacbc47861ef9804fe60545087e48e06bfc82 (patch)
treead5c17a4029f7aff2f7587242644d4c140562aed /src/leap/email/smtp
parent34abbe9a8b9f6ce7eff1d68d48f5be842868dff8 (diff)
parent8ddd01b8f5bcc14fb7a51bfb95d0eacc83db640e (diff)
Merge branch 'release-0.2.0' into release/v0.2.0
removing soledad + email from release branch created with git flow
Diffstat (limited to 'src/leap/email/smtp')
-rw-r--r--src/leap/email/smtp/README43
-rw-r--r--src/leap/email/smtp/__init__.py0
-rw-r--r--src/leap/email/smtp/smtprelay.py207
-rw-r--r--src/leap/email/smtp/tests/185CA770.key79
-rw-r--r--src/leap/email/smtp/tests/185CA770.pub52
-rw-r--r--src/leap/email/smtp/tests/__init__.py215
-rw-r--r--src/leap/email/smtp/tests/mail.txt10
-rw-r--r--src/leap/email/smtp/tests/test_smtprelay.py75
8 files changed, 0 insertions, 681 deletions
diff --git a/src/leap/email/smtp/README b/src/leap/email/smtp/README
deleted file mode 100644
index 2b2a1180..00000000
--- a/src/leap/email/smtp/README
+++ /dev/null
@@ -1,43 +0,0 @@
-Leap SMTP Relay
-===============
-
-Outgoing mail workflow:
-
- * LEAP client runs a thin SMTP proxy on the user's device, bound to
- localhost.
- * User's MUA is configured outgoing SMTP to localhost
- * When SMTP proxy receives an email from MUA
- * SMTP proxy queries Key Manager for the user's private key and public
- keys of all recipients
- * Message is signed by sender and encrypted to recipients.
- * If recipient's key is missing, email goes out in cleartext (unless
- user has configured option to send only encrypted email)
- * Finally, message is relayed to provider's SMTP relay
-
-
-Dependencies
-------------
-
-Leap SMTP Relay depends on the following python libraries:
-
- * Twisted 12.3.0 [1]
- * zope.interface 4.0.3 [2]
-
-[1] http://pypi.python.org/pypi/Twisted/12.3.0
-[2] http://pypi.python.org/pypi/zope.interface/4.0.3
-
-
-How to run
-----------
-
-To launch the SMTP relay, run the following command:
-
- twistd -y smtprelay.tac
-
-
-Running tests
--------------
-
-Tests are run using Twisted's Trial API, like this:
-
- trial leap.email.smtp.tests
diff --git a/src/leap/email/smtp/__init__.py b/src/leap/email/smtp/__init__.py
deleted file mode 100644
index e69de29b..00000000
--- a/src/leap/email/smtp/__init__.py
+++ /dev/null
diff --git a/src/leap/email/smtp/smtprelay.py b/src/leap/email/smtp/smtprelay.py
deleted file mode 100644
index 7a647717..00000000
--- a/src/leap/email/smtp/smtprelay.py
+++ /dev/null
@@ -1,207 +0,0 @@
-import re
-import gnupg
-from zope.interface import implements
-from StringIO import StringIO
-from twisted.mail import smtp
-from twisted.internet.protocol import ServerFactory
-from twisted.internet import reactor
-from twisted.internet import defer
-from twisted.application import internet, service
-from twisted.python import log
-from email.Header import Header
-
-
-class SMTPFactory(ServerFactory):
- """
- Factory for an SMTP server with encrypted relaying capabilities.
- """
-
- def __init__(self, gpg=None):
- self._gpg = gpg
-
- def buildProtocol(self, addr):
- "Return a protocol suitable for the job."
- # TODO: use ESMTP here.
- smtpProtocol = smtp.SMTP(SMTPDelivery(self._gpg))
- smtpProtocol.factory = self
- return smtpProtocol
-
-
-class SMTPDelivery(object):
- """
- Validate email addresses and handle message delivery.
- """
-
- implements(smtp.IMessageDelivery)
-
- def __init__(self, gpg=None):
- if gpg:
- self._gpg = gpg
- else:
- self._gpg = GPGWrapper()
-
- def receivedHeader(self, helo, origin, recipients):
- myHostname, clientIP = helo
- headerValue = "by %s from %s with ESMTP ; %s" % (
- myHostname, clientIP, smtp.rfc822date())
- # email.Header.Header used for automatic wrapping of long lines
- return "Received: %s" % Header(headerValue)
-
- def validateTo(self, user):
- """Assert existence of and trust on recipient's GPG public key."""
- # try to find recipient's public key
- try:
- # this will raise an exception if key is not found
- trust = self._gpg.find_key(user.dest.addrstr)['trust']
- # if key is not ultimatelly trusted, then the message will not
- # be encrypted. So, we check for this below
- #if trust != 'u':
- # raise smtp.SMTPBadRcpt(user)
- log.msg("Accepting mail for %s..." % user.dest)
- return lambda: EncryptedMessage(user, gpg=self._gpg)
- except LookupError:
- raise smtp.SMTPBadRcpt(user)
-
- def validateFrom(self, helo, originAddress):
- # accept mail from anywhere. To reject an address, raise
- # smtp.SMTPBadSender here.
- return originAddress
-
-
-class EncryptedMessage():
- """
- Receive plaintext from client, encrypt it and send message to a
- recipient.
- """
- implements(smtp.IMessage)
-
- SMTP_HOSTNAME = "mail.riseup.net"
- SMTP_PORT = 25
-
- def __init__(self, user, gpg=None):
- self.user = user
- self.getSMTPInfo()
- self.lines = []
- if gpg:
- self._gpg = gpg
- else:
- self._gpg = GPGWrapper()
-
- def lineReceived(self, line):
- """Store email DATA lines as they arrive."""
- self.lines.append(line)
-
- def eomReceived(self):
- """Encrypt and send message."""
- log.msg("Message data complete.")
- self.lines.append('') # add a trailing newline
- self.parseMessage()
- try:
- self.encrypt()
- return self.sendMessage()
- except LookupError:
- return None
-
- def parseMessage(self):
- """Separate message headers from body."""
- sep = self.lines.index('')
- self.headers = self.lines[:sep]
- self.body = self.lines[sep+1:]
-
- def connectionLost(self):
- log.msg("Connection lost unexpectedly!")
- log.err()
- # unexpected loss of connection; don't save
- self.lines = []
-
- def sendSuccess(self, r):
- log.msg(r)
-
- def sendError(self, e):
- log.msg(e)
- log.err()
-
- def prepareHeader(self):
- self.headers.insert(1, "From: %s" % self.user.orig.addrstr)
- self.headers.insert(2, "To: %s" % self.user.dest.addrstr)
- self.headers.append('')
-
- def sendMessage(self):
- self.prepareHeader()
- msg = '\n'.join(self.headers+[self.cyphertext])
- d = defer.Deferred()
- factory = smtp.ESMTPSenderFactory(self.smtp_username,
- self.smtp_password,
- self.smtp_username,
- self.user.dest.addrstr,
- StringIO(msg),
- d)
- # the next call is TSL-powered!
- reactor.connectTCP(self.SMTP_HOSTNAME, self.SMTP_PORT, factory)
- d.addCallback(self.sendSuccess)
- d.addErrback(self.sendError)
- return d
-
- def encrypt(self, always_trust=True):
- # TODO: do not "always trust" here.
- fp = self._gpg.find_key(self.user.dest.addrstr)['fingerprint']
- log.msg("Encrypting to %s" % fp)
- self.cyphertext = str(self._gpg.encrypt('\n'.join(self.body), [fp],
- always_trust=always_trust))
-
- # this will be replaced by some other mechanism of obtaining credentials
- # for SMTP server.
- def getSMTPInfo(self):
- #f = open('/media/smtp-info.txt', 'r')
- #self.smtp_host = f.readline().rstrip()
- #self.smtp_port = f.readline().rstrip()
- #self.smtp_username = f.readline().rstrip()
- #self.smtp_password = f.readline().rstrip()
- #f.close()
- self.smtp_host = ''
- self.smtp_port = ''
- self.smtp_username = ''
- self.smtp_password = ''
-
-
-class GPGWrapper():
- """
- This is a temporary class for handling GPG requests, and should be
- replaced by a more general class used throughout the project.
- """
-
- GNUPG_HOME = "~/.config/leap/gnupg"
- GNUPG_BINARY = "/usr/bin/gpg" # TODO: change this based on OS
-
- def __init__(self, gpghome=GNUPG_HOME, gpgbinary=GNUPG_BINARY):
- self.gpg = gnupg.GPG(gnupghome=gpghome, gpgbinary=gpgbinary)
-
- def find_key(self, email):
- """
- Find user's key based on their email.
- """
- for key in self.gpg.list_keys():
- for uid in key['uids']:
- if re.search(email, uid):
- return key
- raise LookupError("GnuPG public key for %s not found!" % email)
-
- def encrypt(self, data, recipient, always_trust=True):
- # TODO: do not 'always_trust'.
- return self.gpg.encrypt(data, recipient, always_trust=always_trust)
-
- def decrypt(self, data):
- return self.gpg.decrypt(data)
-
- def import_keys(self, data):
- return self.gpg.import_keys(data)
-
-
-# service configuration
-port = 25
-factory = SMTPFactory()
-
-# these enable the use of this service with twistd
-application = service.Application("LEAP SMTP Relay")
-service = internet.TCPServer(port, factory)
-service.setServiceParent(application)
diff --git a/src/leap/email/smtp/tests/185CA770.key b/src/leap/email/smtp/tests/185CA770.key
deleted file mode 100644
index 587b4164..00000000
--- a/src/leap/email/smtp/tests/185CA770.key
+++ /dev/null
@@ -1,79 +0,0 @@
------BEGIN PGP PRIVATE KEY BLOCK-----
-Version: GnuPG v1.4.10 (GNU/Linux)
-
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-=6HcJ
------END PGP PRIVATE KEY BLOCK-----
diff --git a/src/leap/email/smtp/tests/185CA770.pub b/src/leap/email/smtp/tests/185CA770.pub
deleted file mode 100644
index 38af19f8..00000000
--- a/src/leap/email/smtp/tests/185CA770.pub
+++ /dev/null
@@ -1,52 +0,0 @@
------BEGIN PGP PUBLIC KEY BLOCK-----
-Version: GnuPG v1.4.10 (GNU/Linux)
-
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-q3iu
-=RChS
------END PGP PUBLIC KEY BLOCK-----
diff --git a/src/leap/email/smtp/tests/__init__.py b/src/leap/email/smtp/tests/__init__.py
deleted file mode 100644
index 022968e1..00000000
--- a/src/leap/email/smtp/tests/__init__.py
+++ /dev/null
@@ -1,215 +0,0 @@
-import os
-import shutil
-import tempfile
-from leap.email.smtp.smtprelay import GPGWrapper
-from twisted.trial import unittest
-from leap.testing.basetest import BaseLeapTest
-
-
-class OpenPGPTestCase(unittest.TestCase, BaseLeapTest):
-
- def setUp(self):
- # mimic LeapBaseTest.setUpClass behaviour, because this is deprecated
- # in Twisted: http://twistedmatrix.com/trac/ticket/1870
- self.old_path = os.environ['PATH']
- self.old_home = os.environ['HOME']
- self.tempdir = tempfile.mkdtemp(prefix="leap_tests-")
- self.home = self.tempdir
- bin_tdir = os.path.join(
- self.tempdir,
- 'bin')
- os.environ["PATH"] = bin_tdir
- os.environ["HOME"] = self.tempdir
- # setup our own stuff
- self.gnupg_home = self.tempdir + '/gnupg'
- os.mkdir(self.gnupg_home)
- self.email = 'leap@leap.se'
- self._gpg = GPGWrapper(gpghome=self.gnupg_home)
-
- self.assertEqual(self._gpg.import_keys(PUBLIC_KEY).summary(),
- '1 imported', "error importing public key")
- self.assertEqual(self._gpg.import_keys(PRIVATE_KEY).summary(),
- # note that gnupg does not return a successful import
- # for private keys. Bug?
- '0 imported', "error importing private key")
-
- def tearDown(self):
- # mimic LeapBaseTest.tearDownClass behaviour
- os.environ["PATH"] = self.old_path
- os.environ["HOME"] = self.old_home
- # safety check
- assert self.tempdir.startswith('/tmp/leap_tests-')
- shutil.rmtree(self.tempdir)
-
- def test_openpgp_encrypt_decrypt(self):
- text = "simple raw text"
- encrypted = str(self._gpg.encrypt(text, KEY_FINGERPRINT,
- # TODO: handle always trust issue
- always_trust=True))
- self.assertNotEqual(text, encrypted, "failed encrypting text")
- decrypted = str(self._gpg.decrypt(encrypted))
- self.assertEqual(text, decrypted, "failed decrypting text")
-
-
-# Key material for testing
-KEY_FINGERPRINT = "E36E738D69173C13D709E44F2F455E2824D18DDF"
-PUBLIC_KEY = """
------BEGIN PGP PUBLIC KEY BLOCK-----
-Version: GnuPG v1.4.10 (GNU/Linux)
-
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-ZtQ/VymwFL3XdUWV6B/hU4PVAFvO3qlOtdJ6TpE+nEWgcWjCv5g7RjXX
-=MuOY
------END PGP PUBLIC KEY BLOCK-----
-"""
-PRIVATE_KEY = """
------BEGIN PGP PRIVATE KEY BLOCK-----
-Version: GnuPG v1.4.10 (GNU/Linux)
-
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-tF+WjWDTvJLFJCe6O+BFJOWrssNrrra1zGtLC1s8s+Wfpe+bGPL5zpHeebGTwH1U
-22eqgJArlEKxrfarz7W5+uHZJHSjF/K9ZvunLGD0n9GOPMpji3UO3zeM8IYoWn7E
-/EWK1XbjnssNemeeTZ+sDh+qrD7BOi+vCX1IyBxbfqnQfJZvmcPWpruy1UsO+aIC
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-z25CgZgyLCsvu82wuXLKJblrIPJX3Yf+si6KqEWBsmwdOWybsjygaF5HvzgFqAAD
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-Cu8tSosAzB1pS8NcLZzoNoI9dOHrmgJmP+GrOUkcf5GhNZbMoj4GNfGBRYX0SZlQ
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-RZXoH+FTg9UAW87eqU610npOkT6cRaBxaMK/mDtGNdc=
-=JTFu
------END PGP PRIVATE KEY BLOCK-----
-"""
diff --git a/src/leap/email/smtp/tests/mail.txt b/src/leap/email/smtp/tests/mail.txt
deleted file mode 100644
index 95420470..00000000
--- a/src/leap/email/smtp/tests/mail.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-HELO drebs@riseup.net
-MAIL FROM: drebs@riseup.net
-RCPT TO: drebs@riseup.net
-RCPT TO: drebs@leap.se
-DATA
-Subject: leap test
-
-Hello world!
-.
-QUIT
diff --git a/src/leap/email/smtp/tests/test_smtprelay.py b/src/leap/email/smtp/tests/test_smtprelay.py
deleted file mode 100644
index 109e253b..00000000
--- a/src/leap/email/smtp/tests/test_smtprelay.py
+++ /dev/null
@@ -1,75 +0,0 @@
-from datetime import datetime
-import re
-from leap.email.smtp.smtprelay import (
- SMTPFactory,
- #SMTPDelivery, # an object
- EncryptedMessage,
-)
-from leap.email.smtp import tests
-from twisted.test import proto_helpers
-from twisted.mail.smtp import User
-
-
-# some regexps
-IP_REGEX = "(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}" + \
- "([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])"
-HOSTNAME_REGEX = "(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*" + \
- "([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])"
-IP_OR_HOST_REGEX = '(' + IP_REGEX + '|' + HOSTNAME_REGEX + ')'
-
-
-class TestSmtpRelay(tests.OpenPGPTestCase):
-
- EMAIL_DATA = ['HELO relay.leap.se',
- 'MAIL FROM: <user@leap.se>',
- 'RCPT TO: <leap@leap.se>',
- 'DATA',
- 'From: User <user@leap.se>',
- 'To: Leap <leap@leap.se>',
- 'Date: ' + datetime.now().strftime('%c'),
- 'Subject: test message',
- '',
- 'This is a secret message.',
- 'Yours,',
- 'A.',
- '',
- '.',
- 'QUIT']
-
- def assertMatch(self, string, pattern, msg=None):
- if not re.match(pattern, string):
- msg = self._formatMessage(msg, '"%s" does not match pattern "%s".'
- % (string, pattern))
- raise self.failureException(msg)
-
- def test_relay_accepts_valid_email(self):
- """
- Test if SMTP server responds correctly for valid interaction.
- """
-
- SMTP_ANSWERS = ['220 ' + IP_OR_HOST_REGEX +
- ' NO UCE NO UBE NO RELAY PROBES',
- '250 ' + IP_OR_HOST_REGEX + ' Hello ' +
- IP_OR_HOST_REGEX + ', nice to meet you',
- '250 Sender address accepted',
- '250 Recipient address accepted',
- '354 Continue']
- proto = SMTPFactory(self._gpg).buildProtocol(('127.0.0.1', 0))
- transport = proto_helpers.StringTransport()
- proto.makeConnection(transport)
- for i, line in enumerate(self.EMAIL_DATA):
- proto.lineReceived(line + '\r\n')
- self.assertMatch(transport.value(),
- '\r\n'.join(SMTP_ANSWERS[0:i+1]))
- proto.setTimeout(None)
-
- def test_message_encrypt(self):
- proto = SMTPFactory(self._gpg).buildProtocol(('127.0.0.1', 0))
- user = User('leap@leap.se', 'relay.leap.se', proto, 'leap@leap.se')
- m = EncryptedMessage(user, self._gpg)
- for line in self.EMAIL_DATA[4:12]:
- m.lineReceived(line)
- m.parseMessage()
- m.encrypt()
- decrypted = str(self._gpg.decrypt(m.cyphertext))
- self.assertEqual('\n'.join(self.EMAIL_DATA[9:12]), decrypted)