python: Clean up and modernize examples.

* lang/python/examples/Examples.rst: Delete file.
* lang/python/examples/t-edit.py: Likewise.  This is actually a test
case and has been moved to 'tests'.
* lang/python/examples/assuan.py: New file.
* lang/python/examples/decryption-filter.py: Likewise.
* lang/python/examples/delkey.py: Modernize.
* lang/python/examples/encrypt-to-all.py: Likewise.
* lang/python/examples/exportimport.py: Likewise.
* lang/python/examples/genkey.py: Likewise.
* lang/python/examples/inter-edit.py: Likewise.
* lang/python/examples/sign.py: Likewise.
* lang/python/examples/signverify.py: Likewise.
* lang/python/examples/simple.py: Likewise.
* lang/python/examples/testCMSgetkey.py: Likewise.
* lang/python/examples/verifydetails.py: Likewise.

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

1 files changed, 24 insertions, 62 deletions

diff --git a/lang/python/examples/signverify.py b/lang/python/examples/signverify.py
index 6a63112a..7a24d719 100755
--- a/lang/python/examples/signverify.py
+++ b/lang/python/examples/signverify.py
@@ -1,77 +1,39 @@
 #!/usr/bin/env python3
+#
+# Copyright (C) 2016 g10 Code GmbH
 # Copyright (C) 2004,2008 Igor Belyi <[email protected]>
 #
-#    This program is free software; you can redistribute it and/or modify
-#    it under the terms of the GNU General Public License as published by
-#    the Free Software Foundation; either version 2 of the License, or
-#    (at your option) any later version.
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
 #
-#    This program is distributed in the hope that it will be useful,
-#    but WITHOUT ANY WARRANTY; without even the implied warranty of
-#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-#    GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
 #
-#    You should have received a copy of the GNU General Public License
-#    along with this program; if not, write to the Free Software
-#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
 
 # Sample of unattended signing/verifying of a message.
-# It uses keys for [email protected] generated by genkey.pl script
+# It uses keys for [email protected] generated by genkey.py script
 
 import sys
 import os
-from pyme import core
+import pyme
 from pyme.constants.sig import mode
 
-core.check_version(None)
-
-plain = core.Data(b"Test message")
-sig = core.Data()
-c = core.Context()
-user = "joe"
-
-c.signers_clear()
-# Add [email protected]'s keys in the list of signers
-for sigkey in c.op_keylist_all(user, 1):
-    if sigkey.can_sign:
-        c.signers_add(sigkey)
-if not c.signers_enum(0):
-    print("No secret %s's keys suitable for signing!" % user)
-    sys.exit(0)
-
-# This is a map between signer e-mail and its password
-passlist = {
-    b"<[email protected]>": b"Crypt0R0cks"
-    }
-
-# callback will return password based on the e-mail listed in the hint.
-c.set_passphrase_cb(lambda x,y,z: passlist[x[x.rindex("<"):]])
-
-c.op_sign(plain, sig, mode.CLEAR)
-
-# Print out the signature (don't forget to rewind since signing put sig at EOF)
-sig.seek(0, os.SEEK_SET)
-signedtext = sig.read()
-sys.stdout.buffer.write(signedtext)
-
-# Create Data with signed text.
-sig2 = core.Data(signedtext)
-plain2 = core.Data()
+user = "joe+pyme"
 
-# Verify.
-c.op_verify(sig2, None, plain2)
-result = c.op_verify_result()
+with pyme.Context(pinentry_mode=pyme.constants.PINENTRY_MODE_LOOPBACK) as c:
+    keys = list(c.keylist(user))
+    if len(keys) == 0:
+        sys.exit("No key matching {}.".format(user))
 
-# List results for all signatures. Status equal 0 means "Ok".
-for index, sign in enumerate(result.signatures):
-    print("signature", index, ":")
-    print("  summary:    ", sign.summary)
-    print("  status:     ", sign.status)
-    print("  timestamp:  ", sign.timestamp)
-    print("  fingerprint:", sign.fpr)
-    print("  uid:        ", c.get_key(sign.fpr, 0).uids[0].uid)
+    c.signers = keys[:1]
+    c.set_passphrase_cb(lambda *args: "Crypt0R0cks")
+    signed_data, _ = c.sign(b"Test message", mode=mode.CLEAR)
 
-# Print "unsigned" text. Rewind since verify put plain2 at EOF.
-plain2.seek(0, os.SEEK_SET)
-print("\n")
-sys.stdout.buffer.write(plain2.read())
+    data, result = c.verify(signed_data, verify=keys[:1])
+    print("Data: {!r}\nSignature: {!s}".format(data, result.signatures[0]))