Clean up tests and add basic GPG infrastructure.

5 files changed, 228 insertions, 74 deletions

diff --git a/src/leap/email/smtp/README b/src/leap/email/smtp/README
index dc440d3d..a351dcec 100644
--- a/src/leap/email/smtp/README
+++ b/src/leap/email/smtp/README
@@ -1,3 +1,41 @@
+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]
+
+[1] http://pypi.python.org/pypi/Twisted/12.3.0
+
+
+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/test_all.py b/src/leap/email/smtp/test_all.py
deleted file mode 100644
index a760ba53..00000000
--- a/src/leap/email/smtp/test_all.py
+++ /dev/null
@@ -1,10 +0,0 @@
-import sys
-import unittest
-
-import tests
-
-def test_suite():
-    return tests.test_suite()
-
-if __name__ == '__main__':
-    unittest.main(defaultTest='test_suite')
diff --git a/src/leap/email/smtp/tests/__init__.py b/src/leap/email/smtp/tests/__init__.py
index adb28414..3d72377e 100644
--- a/src/leap/email/smtp/tests/__init__.py
+++ b/src/leap/email/smtp/tests/__init__.py
@@ -1,11 +1,196 @@
 import unittest
+import gnupg
+import shutil
+import ipdb
 
-def test_suite():
-    import tests.test_send
+class OpenPGPTestCase(unittest.TestCase):
 
-    suite = unittest.TestSuite()
+    PREFIX     = "/var/tmp"
+    GNUPG_HOME = "%s/gnupg" % PREFIX
+    EMAIL      = 'leap@leap.se'
 
-    suite.addTest(tests.test_send.test_suite())
+    def setUp(self):
+        self._gpg = gnupg.GPG(gnupghome=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")
 
-    return suite
+    def tearDown(self):
+        shutil.rmtree(self.GNUPG_HOME)
 
+    def test_encrypt_decrypt(self):
+        text = "simple raw text"
+        encrypted = str(self._gpg.encrypt(text, KEY_FINGERPRINT,
+                                          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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+=MuOY
+-----END PGP PUBLIC KEY BLOCK-----
+"""
+PRIVATE_KEY = """
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+Version: GnuPG v1.4.10 (GNU/Linux)
+
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+LQSVgLLF4ulYlPCjWIIuQwrPbJfWUVVr2dPUFVM85DCv8gBzk5c121snXh9Swovm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+=JTFu
+-----END PGP PRIVATE KEY BLOCK-----
+"""
diff --git a/src/leap/email/smtp/tests/test_encrypt.py b/src/leap/email/smtp/tests/test_encrypt.py
deleted file mode 100644
index 1051b587..00000000
--- a/src/leap/email/smtp/tests/test_encrypt.py
+++ /dev/null
@@ -1,25 +0,0 @@
-import os
-import unittest
-import gnupg
-
-class EncryptMessageTestCase(unittest.TestCase):
-
-    def test_encrypt_to_signonly(self):
-        plaintext = BytesIO(b'Hello World\n')
-        ciphertext = BytesIO()
-        ctx = gpgme.Context()
-        recipient = ctx.get_key('15E7CE9BF1771A4ABC550B31F540A569CB935A42')
-        try:
-            ctx.encrypt([recipient], gpgme.ENCRYPT_ALWAYS_TRUST,
-                        plaintext, ciphertext)
-        except gpgme.GpgmeError as exc:
-            self.assertEqual(exc.args[0], gpgme.ERR_SOURCE_UNKNOWN)
-            self.assertEqual(exc.args[1], gpgme.ERR_GENERAL)
-        else:
-            self.fail('gpgme.GpgmeError not raised')
-
-
-def test_suite():
-    loader = unittest.TestLoader()
-    return loader.loadTestsFromName(__name__)
-
diff --git a/src/leap/email/smtp/tests/util.py b/src/leap/email/smtp/tests/util.py
deleted file mode 100644
index b62cb731..00000000
--- a/src/leap/email/smtp/tests/util.py
+++ /dev/null
@@ -1,34 +0,0 @@
-# copied from pygpgme's tests
-import os
-import shutil
-import tempfile
-import unittest
-
-import gpgme
-
-import smtprelay
-
-__all__ = ['GpgHomeTestCase']
-
-keydir = os.path.join(os.path.dirname(__file__), 'keys')
-
-class GpgHomeTestCase(unittest.TestCase):
-
-    gpg_conf_contents = ''
-    import_keys = []
-
-    def keyfile(self, key):
-        return open(os.path.join(keydir, key), 'rb')
-
-    def setUp(self):
-        self._gpghome = tempfile.mkdtemp(prefix='tmp.gpghome')
-
-        # import requested keys into the keyring
-        ctx = gpgme.Context()
-        for key in self.import_keys:
-            with self.keyfile(key) as fp:
-                ctx.import_(fp)
-
-    def tearDown(self):
-        del os.environ['GNUPGHOME']
-        shutil.rmtree(self._gpghome, ignore_errors=True)