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, 14 insertions, 9 deletions

diff --git a/lang/python/pyme/util.py b/lang/python/pyme/util.py
index 5527a1a2..bbd28fe7 100644
--- a/lang/python/pyme/util.py
+++ b/lang/python/pyme/util.py
@@ -1,3 +1,4 @@
+# Copyright (C) 2016 g10 Code GmbH
 # Copyright (C) 2004,2008 Igor Belyi <[email protected]>
 # Copyright (C) 2002 John Goerzen <[email protected]>
 #
@@ -17,12 +18,16 @@
 
 from . import pygpgme
 
-def process_constants(starttext, dict):
-    """Called by the constant libraries to load up the appropriate constants
-    from the C library."""
-    index = len(starttext)
-    for identifier in dir(pygpgme):
-        if not identifier.startswith(starttext):
-            continue
-        name = identifier[index:]
-        dict[name] = getattr(pygpgme, identifier)
+def process_constants(prefix, scope):
+    """Called by the constant modules to load up the constants from the C
+    library starting with PREFIX.  Matching constants will be inserted
+    into SCOPE with PREFIX stripped from the names.  Returns the names
+    of inserted constants.
+
+    """
+    index = len(prefix)
+    constants = {identifier[index:]: getattr(pygpgme, identifier)
+                 for identifier in dir(pygpgme)
+                 if identifier.startswith(prefix)}
+    scope.update(constants)
+    return list(constants.keys())