From 314bc876d564cd6265cc8eb4095e423f1140349a Mon Sep 17 00:00:00 2001
From: drebs <drebs@leap.se>
Date: Mon, 15 Apr 2013 10:41:56 -0300
Subject: Add basic openpgp key handling to Key Manager

---
 src/leap/common/keymanager/openpgp.py | 126 ++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 src/leap/common/keymanager/openpgp.py

(limited to 'src/leap/common/keymanager/openpgp.py')

diff --git a/src/leap/common/keymanager/openpgp.py b/src/leap/common/keymanager/openpgp.py
new file mode 100644
index 0000000..bb73089
--- /dev/null
+++ b/src/leap/common/keymanager/openpgp.py
@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+# openpgpwrapper.py
+# Copyright (C) 2013 LEAP
+#
+# 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 3 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.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+"""
+Infrastructure for using OpenPGP keys in Key Manager.
+"""
+
+
+import re
+
+from leap.common.keymanager.errors import (
+    KeyNotFound,
+    KeyAlreadyExists,
+)
+from leap.common.keymanager.keys import (
+    EncryptionKey,
+    KeyTypeWrapper,
+)
+from leap.common.keymanager.gpg import GPGWrapper
+
+
+class OpenPGPKey(EncryptionKey):
+    """
+    Base class for OpenPGP keys.
+    """
+
+
+class OpenPGPWrapper(KeyTypeWrapper):
+    """
+    A wrapper for OpenPGP keys.
+    """
+
+    def __init__(self, gnupghome=None):
+        self._gpg = GPGWrapper(gnupghome=gnupghome)
+
+    def _build_key(self, address, result):
+        """
+        Build an OpenPGPWrapper key for C{address} based on C{result} from
+        local storage.
+
+        @param address: The address bound to the key.
+        @type address: str
+        @param result: Result obtained from GPG storage.
+        @type result: dict
+        """
+        key_data = self._gpg.export_keys(result['fingerprint'], secret=False)
+        return OpenPGPKey(
+            address,
+            key_id=result['keyid'],
+            fingerprint=result['fingerprint'],
+            key_data=key_data,
+            length=result['length'],
+            expiry_date=result['expires'],
+            validation=None,  # TODO: verify for validation.
+        )
+
+    def gen_key(self, address):
+        """
+        Generate an OpenPGP keypair for C{address}.
+
+        @param address: The address bound to the key.
+        @type address: str
+        @return: The key bound to C{address}.
+        @rtype: OpenPGPKey
+        @raise KeyAlreadyExists: If key already exists in local database.
+        """
+        try:
+            self.get_key(address)
+            raise KeyAlreadyExists()
+        except KeyNotFound:
+            pass
+        params = self._gpg.gen_key_input(
+            key_type='RSA',
+            key_length=4096,
+            name_real=address,
+            name_email=address,
+            name_comment='Generated by LEAP Key Manager.')
+        self._gpg.gen_key(params)
+        return self.get_key(address)
+
+    def get_key(self, address):
+        """
+        Get key bound to C{address} from local storage.
+
+        @param address: The address bound to the key.
+        @type address: str
+
+        @return: The key bound to C{address}.
+        @rtype: OpenPGPKey
+        @raise KeyNotFound: If the key was not found on local storage.
+        """
+        m = re.compile('.*<%s>$' % address)
+        keys = self._gpg.list_keys(secret=False)
+
+        def bound_to_address(key):
+             return bool(filter(lambda u: m.match(u), key['uids']))
+
+        try:
+            bound_key = filter(bound_to_address, keys).pop()
+            return self._build_key(address, bound_key)
+        except IndexError:
+            raise KeyNotFound(address)
+
+    def put_key(self, data):
+        """
+        Put key contained in {data} in local storage.
+
+        @param key: The key data to be stored.
+        @type key: str
+        """
+        self._gpg.import_keys(data)
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