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, 20 insertions, 0 deletions

diff --git a/lang/python/tests/t-encrypt-sym.py b/lang/python/tests/t-encrypt-sym.py
index 0b24fd52..c5be183e 100755
--- a/lang/python/tests/t-encrypt-sym.py
+++ b/lang/python/tests/t-encrypt-sym.py
@@ -18,6 +18,7 @@
 # License along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 import os
+import pyme
 from pyme import core, constants
 import support
 
@@ -61,3 +62,22 @@ for passphrase in ("abc", b"abc"):
     plaintext = plain.read()
     assert plaintext == b"Hallo Leute\n", \
         "Wrong plaintext {!r}".format(plaintext)
+
+# Idiomatic interface.
+for passphrase in ("abc", b"abc"):
+    with pyme.Context(armor=True) as c:
+        # Check that the passphrase callback is not altered.
+        def f(*args):
+            assert False
+        c.set_passphrase_cb(f)
+
+        message = "Hallo Leute\n".encode()
+        ciphertext, _, _ = c.encrypt(message,
+                                     passphrase=passphrase,
+                                     sign=False)
+        assert ciphertext.find(b'BEGIN PGP MESSAGE') > 0, 'Marker not found'
+
+        plaintext, _, _ = c.decrypt(ciphertext, passphrase=passphrase)
+        assert plaintext == message, 'Message body not recovered'
+
+        assert c._passphrase_cb[1] == f, "Passphrase callback not restored"