[omemo] Refactor Plugin

omemo/backend/util.py

@@ -0,0 +1,44 @@
+# Copyright (C) 2015 Bahtiar `kalkin-` Gadimov <bahtiar@gadimov.de>
+#
+# This file is part of OMEMO Gajim Plugin.
+#
+# OMEMO Gajim Plugin 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; version 3 only.
+#
+# OMEMO Gajim Plugin 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 OMEMO Gajim Plugin. If not, see <http://www.gnu.org/licenses/>.
+
+import binascii
+import textwrap
+from enum import IntEnum
+
+DEFAULT_PREKEY_AMOUNT = 100
+MIN_PREKEY_AMOUNT = 80
+SPK_ARCHIVE_TIME = 86400 * 15  # 15 Days
+SPK_CYCLE_TIME = 86400         # 24 Hours
+
+
+class Trust(IntEnum):
+    UNTRUSTED = 0
+    TRUSTED = 1
+    UNDECIDED = 2
+
+
+def get_fingerprint(identity_key, formatted=False):
+    public_key = identity_key.getPublicKey().serialize()
+    fingerprint = binascii.hexlify(public_key).decode()[2:]
+    if not formatted:
+        return fingerprint
+    fplen = len(fingerprint)
+    wordsize = fplen // 8
+    buf = ''
+    for w in range(0, fplen, wordsize):
+        buf += '{0} '.format(fingerprint[w:w + wordsize])
+    buf = textwrap.fill(buf, width=36)
+    return buf.rstrip().upper()