python: Add an idiomatic interface.

* configure.ac: Bump required Python version.
* lang/python/pyme/__init__.py: Update docstring.  Import Context and
Data.
* lang/python/pyme/core.py (Context.encrypt): New function.
(Context.decrypt): Likewise.
(Context.sign): Likewise.
(Context.verify): Likewise.
* lang/python/pyme/errors.py: Add new errors.
* lang/python/pyme/util.py (process_constants): Rework and return the
inserted keys.
* lang/python/tests/Makefile.am (EXTRA_DIST): Add new keys.
* lang/python/tests/encrypt-only.asc: New file.
* lang/python/tests/sign-only.asc: Likewise.
* lang/python/tests/initial.py: Mark key 'Alpha' as trusted, import
new keys.
* lang/python/tests/support.py: Add fingerprints of known keys.
(in_srcdir): New function.
(print_data): Handle bytes too.
(mark_key_trusted): New function.
* lang/python/tests/t-decrypt-verify.py: Adjust test.  Test idiomatic
interface.
* lang/python/tests/t-decrypt.py: Test idiomatic interface.
* lang/python/tests/t-encrypt-sign.py: Likewise.
* lang/python/tests/t-encrypt-sym.py: Likewise.
* lang/python/tests/t-encrypt.py: Likewise.
* lang/python/tests/t-idiomatic.py: Simplify.
* lang/python/tests/t-keylist.py: Adjust to newly trusted key.
* lang/python/tests/t-sign.py: Likewise.  Test idiomatic interface.
* lang/python/tests/t-signers.py: Likewise.
* lang/python/tests/t-verify.py: Likewise.

Signed-off-by: Justus Winter <[email protected]>

1 files changed, 24 insertions, 0 deletions

diff --git a/lang/python/tests/t-encrypt-sign.py b/lang/python/tests/t-encrypt-sign.py
index cba697c1..31cc94f0 100755
--- a/lang/python/tests/t-encrypt-sign.py
+++ b/lang/python/tests/t-encrypt-sign.py
@@ -18,6 +18,7 @@
 # License along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 import sys
+import pyme
 from pyme import core, constants
 import support
 
@@ -69,3 +70,26 @@ for recipients in (keys, []):
     check_result(result, constants.SIG_MODE_NORMAL)
 
     support.print_data(sink)
+
+
+# Idiomatic interface.
+with pyme.Context(armor=True) as c:
+    message = "Hallo Leute\n".encode()
+    ciphertext, _, sig_result = c.encrypt(message,
+                                          recipients=keys,
+                                          always_trust=True)
+    assert len(ciphertext) > 0
+    assert ciphertext.find(b'BEGIN PGP MESSAGE') > 0, 'Marker not found'
+    check_result(sig_result, constants.SIG_MODE_NORMAL)
+
+    c.signers = [c.get_key(support.sign_only, True)]
+    c.encrypt(message, recipients=keys, always_trust=True)
+
+    c.signers = [c.get_key(support.encrypt_only, True)]
+    try:
+        c.encrypt(message, recipients=keys, always_trust=True)
+    except pyme.errors.InvalidSigners as e:
+        assert len(e.signers) == 1
+        assert support.encrypt_only.endswith(e.signers[0].fpr)
+    else:
+        assert False, "Expected an InvalidSigners error, got none"