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authordrebs <drebs@leap.se>2013-09-30 15:55:01 -0300
committerdrebs <drebs@leap.se>2013-10-02 09:12:28 -0300
commitfea2f9b9c3f2427184e957d860aca7d96e116bbf (patch)
treea95b45945253df8ece3e21c8a3b7032a7b937fef /keymanager/src
parent074a21c526e2b65ab9ae129f0a2bd2df838288dc (diff)
Update to use gnupg 1.2.2 module.
Diffstat (limited to 'keymanager/src')
-rw-r--r--keymanager/src/leap/keymanager/gpg.py398
-rw-r--r--keymanager/src/leap/keymanager/openpgp.py65
-rw-r--r--keymanager/src/leap/keymanager/tests/test_keymanager.py1
3 files changed, 33 insertions, 431 deletions
diff --git a/keymanager/src/leap/keymanager/gpg.py b/keymanager/src/leap/keymanager/gpg.py
deleted file mode 100644
index b81b218..0000000
--- a/keymanager/src/leap/keymanager/gpg.py
+++ /dev/null
@@ -1,398 +0,0 @@
-# -*- coding: utf-8 -*-
-# gpgwrapper.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/>.
-
-
-"""
-A GPG wrapper used to handle OpenPGP keys.
-
-This is a temporary class that will be superseded by the a revised version of
-python-gnupg.
-"""
-
-
-import os
-import gnupg
-import re
-from gnupg import (
- logger,
- _is_sequence,
- _make_binary_stream,
-)
-
-
-class ListPackets():
- """
- Handle status messages for --list-packets.
- """
-
- def __init__(self, gpg):
- """
- Initialize the packet listing handling class.
-
- :param gpg: GPG object instance.
- :type gpg: gnupg.GPG
- """
- self.gpg = gpg
- self.nodata = None
- self.key = None
- self.need_passphrase = None
- self.need_passphrase_sym = None
- self.userid_hint = None
-
- def handle_status(self, key, value):
- """
- Handle one line of the --list-packets status message.
-
- :param key: The status message key.
- :type key: str
- :param value: The status message value.
- :type value: str
- """
- # TODO: write tests for handle_status
- if key == 'NODATA':
- self.nodata = True
- if key == 'ENC_TO':
- # This will only capture keys in our keyring. In the future we
- # may want to include multiple unknown keys in this list.
- self.key, _, _ = value.split()
- if key == 'NEED_PASSPHRASE':
- self.need_passphrase = True
- if key == 'NEED_PASSPHRASE_SYM':
- self.need_passphrase_sym = True
- if key == 'USERID_HINT':
- self.userid_hint = value.strip().split()
-
-
-class GPGWrapper(gnupg.GPG):
- """
- This is a temporary class for handling GPG requests, and should be
- replaced by a more general class used throughout the project.
- """
-
- GNUPG_HOME = os.environ['HOME'] + "/.config/leap/gnupg"
- GNUPG_BINARY = "/usr/bin/gpg" # this has to be changed based on OS
-
- def __init__(self, gpgbinary=GNUPG_BINARY, gnupghome=GNUPG_HOME,
- verbose=False, use_agent=False, keyring=None, options=None):
- """
- Initialize a GnuPG process wrapper.
-
- :param gpgbinary: Name for GnuPG binary executable.
- :type gpgbinary: C{str}
- :param gpghome: Full pathname to directory containing the public and
- private keyrings.
- :type gpghome: C{str}
- :param keyring: Name of alternative keyring file to use. If specified,
- the default keyring is not used.
- :param verbose: Should some verbose info be output?
- :type verbose: bool
- :param use_agent: Should pass `--use-agent` to GPG binary?
- :type use_agent: bool
- :param keyring: Path for the keyring to use.
- :type keyring: str
- @options: A list of additional options to pass to the GPG binary.
- :type options: list
-
- @raise: RuntimeError with explanation message if there is a problem
- invoking gpg.
- """
- # XXX: options isn't always supported, so removing for the time being
- gnupg.GPG.__init__(self, gnupghome=gnupghome, gpgbinary=gpgbinary,
- verbose=verbose, use_agent=use_agent,
- keyring=keyring)#, options=options)
- self.result_map['list-packets'] = ListPackets
-
- def find_key_by_email(self, email, secret=False):
- """
- Find user's key based on their email.
-
- :param email: Email address of key being searched for.
- :type email: str
- :param secret: Should we search for a secret key?
- :type secret: bool
-
- :return: The fingerprint of the found key.
- :rtype: str
- """
- for key in self.list_keys(secret=secret):
- for uid in key['uids']:
- if re.search(email, uid):
- return key
- raise LookupError("GnuPG public key for email %s not found!" % email)
-
- def find_key_by_subkey(self, subkey, secret=False):
- """
- Find user's key based on a subkey fingerprint.
-
- :param email: Subkey fingerprint of the key being searched for.
- :type email: str
- :param secret: Should we search for a secret key?
- :type secret: bool
-
- :return: The fingerprint of the found key.
- :rtype: str
- """
- for key in self.list_keys(secret=secret):
- for sub in key['subkeys']:
- if sub[0] == subkey:
- return key
- raise LookupError(
- "GnuPG public key for subkey %s not found!" % subkey)
-
- def find_key_by_keyid(self, keyid, secret=False):
- """
- Find user's key based on the key ID.
-
- :param email: The key ID of the key being searched for.
- :type email: str
- :param secret: Should we search for a secret key?
- :type secret: bool
-
- :return: The fingerprint of the found key.
- :rtype: str
- """
- for key in self.list_keys(secret=secret):
- if keyid == key['keyid']:
- return key
- raise LookupError(
- "GnuPG public key for keyid %s not found!" % keyid)
-
- def find_key_by_fingerprint(self, fingerprint, secret=False):
- """
- Find user's key based on the key fingerprint.
-
- :param email: The fingerprint of the key being searched for.
- :type email: str
- :param secret: Should we search for a secret key?
- :type secret: bool
-
- :return: The fingerprint of the found key.
- :rtype: str
- """
- for key in self.list_keys(secret=secret):
- if fingerprint == key['fingerprint']:
- return key
- raise LookupError(
- "GnuPG public key for fingerprint %s not found!" % fingerprint)
-
- def encrypt(self, data, recipient, sign=None, always_trust=True,
- passphrase=None, symmetric=False):
- """
- Encrypt data using GPG.
-
- :param data: The data to be encrypted.
- :type data: str
- :param recipient: The address of the public key to be used.
- :type recipient: str
- :param sign: Should the encrypted content be signed?
- :type sign: bool
- :param always_trust: Skip key validation and assume that used keys
- are always fully trusted?
- :type always_trust: bool
- :param passphrase: The passphrase to be used if symmetric encryption
- is desired.
- :type passphrase: str
- :param symmetric: Should we encrypt to a password?
- :type symmetric: bool
-
- :return: An object with encrypted result in the `data` field.
- :rtype: gnupg.Crypt
- """
- # TODO: devise a way so we don't need to "always trust".
- return gnupg.GPG.encrypt(self, data, recipient, sign=sign,
- always_trust=always_trust,
- passphrase=passphrase,
- symmetric=symmetric,
- cipher_algo='AES256')
-
- def decrypt(self, data, always_trust=True, passphrase=None):
- """
- Decrypt data using GPG.
-
- :param data: The data to be decrypted.
- :type data: str
- :param always_trust: Skip key validation and assume that used keys
- are always fully trusted?
- :type always_trust: bool
- :param passphrase: The passphrase to be used if symmetric encryption
- is desired.
- :type passphrase: str
-
- :return: An object with decrypted result in the `data` field.
- :rtype: gnupg.Crypt
- """
- # TODO: devise a way so we don't need to "always trust".
- return gnupg.GPG.decrypt(self, data, always_trust=always_trust,
- passphrase=passphrase)
-
- def send_keys(self, keyserver, *keyids):
- """
- Send keys to a keyserver
-
- :param keyserver: The keyserver to send the keys to.
- :type keyserver: str
- :param keyids: The key ids to send.
- :type keyids: list
-
- :return: A list of keys sent to server.
- :rtype: gnupg.ListKeys
- """
- # TODO: write tests for this.
- # TODO: write a SendKeys class to handle status for this.
- result = self.result_map['list'](self)
- gnupg.logger.debug('send_keys: %r', keyids)
- data = gnupg._make_binary_stream("", self.encoding)
- args = ['--keyserver', keyserver, '--send-keys']
- args.extend(keyids)
- self._handle_io(args, data, result, binary=True)
- gnupg.logger.debug('send_keys result: %r', result.__dict__)
- data.close()
- return result
-
- def encrypt_file(self, file, recipients, sign=None,
- always_trust=False, passphrase=None,
- armor=True, output=None, symmetric=False,
- cipher_algo=None):
- """
- Encrypt the message read from the file-like object 'file'.
-
- :param file: The file to be encrypted.
- :type data: file
- :param recipient: The address of the public key to be used.
- :type recipient: str
- :param sign: Should the encrypted content be signed?
- :type sign: bool
- :param always_trust: Skip key validation and assume that used keys
- are always fully trusted?
- :type always_trust: bool
- :param passphrase: The passphrase to be used if symmetric encryption
- is desired.
- :type passphrase: str
- :param armor: Create ASCII armored output?
- :type armor: bool
- :param output: Path of file to write results in.
- :type output: str
- :param symmetric: Should we encrypt to a password?
- :type symmetric: bool
- :param cipher_algo: Algorithm to use.
- :type cipher_algo: str
-
- :return: An object with encrypted result in the `data` field.
- :rtype: gnupg.Crypt
- """
- args = ['--encrypt']
- if symmetric:
- args = ['--symmetric']
- if cipher_algo:
- args.append('--cipher-algo %s' % cipher_algo)
- else:
- args = ['--encrypt']
- if not _is_sequence(recipients):
- recipients = (recipients,)
- for recipient in recipients:
- args.append('--recipient "%s"' % recipient)
- if armor: # create ascii-armored output - set to False for binary
- args.append('--armor')
- if output: # write the output to a file with the specified name
- if os.path.exists(output):
- os.remove(output) # to avoid overwrite confirmation message
- args.append('--output "%s"' % output)
- if sign:
- args.append('--sign --default-key "%s"' % sign)
- if always_trust:
- args.append("--always-trust")
- result = self.result_map['crypt'](self)
- self._handle_io(args, file, result, passphrase=passphrase, binary=True)
- logger.debug('encrypt result: %r', result.data)
- return result
-
- def list_packets(self, data):
- """
- List the sequence of packets.
-
- :param data: The data to extract packets from.
- :type data: str
-
- :return: An object with packet info.
- :rtype ListPackets
- """
- args = ["--list-packets"]
- result = self.result_map['list-packets'](self)
- self._handle_io(
- args,
- _make_binary_stream(data, self.encoding),
- result,
- )
- return result
-
- def encrypted_to(self, data):
- """
- Return the key to which data is encrypted to.
-
- :param data: The data to be examined.
- :type data: str
-
- :return: The fingerprint of the key to which data is encrypted to.
- :rtype: str
- """
- # TODO: make this support multiple keys.
- result = self.list_packets(data)
- if not result.key:
- raise LookupError(
- "Content is not encrypted to a GnuPG key!")
- try:
- return self.find_key_by_keyid(result.key)
- except:
- return self.find_key_by_subkey(result.key)
-
- def is_encrypted_sym(self, data):
- """
- Say whether some chunk of data is encrypted to a symmetric key.
-
- :param data: The data to be examined.
- :type data: str
-
- :return: Whether data is encrypted to a symmetric key.
- :rtype: bool
- """
- result = self.list_packets(data)
- return bool(result.need_passphrase_sym)
-
- def is_encrypted_asym(self, data):
- """
- Say whether some chunk of data is encrypted to a private key.
-
- :param data: The data to be examined.
- :type data: str
-
- :return: Whether data is encrypted to a private key.
- :rtype: bool
- """
- result = self.list_packets(data)
- return bool(result.key)
-
- def is_encrypted(self, data):
- """
- Say whether some chunk of data is encrypted to a key.
-
- :param data: The data to be examined.
- :type data: str
-
- :return: Whether data is encrypted to a key.
- :rtype: bool
- """
- return self.is_encrypted_asym(data) or self.is_encrypted_sym(data)
diff --git a/keymanager/src/leap/keymanager/openpgp.py b/keymanager/src/leap/keymanager/openpgp.py
index 7946db8..9d8d89a 100644
--- a/keymanager/src/leap/keymanager/openpgp.py
+++ b/keymanager/src/leap/keymanager/openpgp.py
@@ -27,6 +27,8 @@ import re
import shutil
import tempfile
+from gnupg import GPG
+from gnupg.gnupg import GPGUtilities
from leap.common.check import leap_assert, leap_assert_type
from leap.keymanager import errors
@@ -38,7 +40,6 @@ from leap.keymanager.keys import (
KEYMANAGER_KEY_TAG,
TAGS_ADDRESS_PRIVATE_INDEX,
)
-from leap.keymanager.gpg import GPGWrapper
logger = logging.getLogger(__name__)
@@ -46,15 +47,15 @@ logger = logging.getLogger(__name__)
class TempGPGWrapper(object):
"""
- A context manager returning a temporary GPG wrapper keyring, which
- contains exactly zero or one pubkeys, and zero or one privkeys.
-
- Temporary unitary keyrings allow the to use GPG's facilities for exactly
- one key. This function creates an empty temporary keyring and imports
- C{keys} if it is not None.
+ A context manager that wraps a temporary GPG keyring which only contains
+ the keys given at object creation.
"""
+
def __init__(self, keys=None, gpgbinary=None):
"""
+ Create an empty temporary keyring and import any given C{keys} into
+ it.
+
:param keys: OpenPGP key, or list of.
:type keys: OpenPGPKey or list of OpenPGPKeys
:param gpgbinary: Name for GnuPG binary executable.
@@ -67,14 +68,15 @@ class TempGPGWrapper(object):
if not isinstance(keys, list):
keys = [keys]
self._keys = keys
- for key in filter(None, keys):
+ for key in keys:
leap_assert_type(key, OpenPGPKey)
def __enter__(self):
"""
- Calls the unitary gpgwrapper initializer
+ Build and return a GPG keyring containing the keys given on
+ object creation.
- :return: A GPG wrapper with a unitary keyring.
+ :return: A GPG instance containing the keys given on object creation.
:rtype: gnupg.GPG
"""
self._build_keyring()
@@ -82,19 +84,16 @@ class TempGPGWrapper(object):
def __exit__(self, exc_type, exc_value, traceback):
"""
- Ensures the gpgwrapper is properly destroyed.
+ Ensure the gpg is properly destroyed.
"""
# TODO handle exceptions and log here
self._destroy_keyring()
def _build_keyring(self):
"""
- Create an empty GPG keyring and import C{keys} into it.
-
- :param keys: List of keys to add to the keyring.
- :type keys: list of OpenPGPKey
+ Create a GPG keyring containing the keys given on object creation.
- :return: A GPG wrapper with a unitary keyring.
+ :return: A GPG instance containing the keys given on object creation.
:rtype: gnupg.GPG
"""
privkeys = [key for key in self._keys if key and key.private is True]
@@ -111,14 +110,13 @@ class TempGPGWrapper(object):
listkeys = lambda: self._gpg.list_keys()
listsecretkeys = lambda: self._gpg.list_keys(secret=True)
- self._gpg = GPGWrapper(
- gnupghome=tempfile.mkdtemp(),
- gpgbinary=self._gpgbinary)
+ self._gpg = GPG(binary=self._gpgbinary,
+ homedir=tempfile.mkdtemp())
leap_assert(len(listkeys()) is 0, 'Keyring not empty.')
# import keys into the keyring:
# concatenating ascii-armored keys, which is correctly
- # understood by the GPGWrapper.
+ # understood by GPG.
self._gpg.import_keys("".join(
[x.key_data for x in publkeys + privkeys]))
@@ -135,7 +133,7 @@ class TempGPGWrapper(object):
def _destroy_keyring(self):
"""
- Securely erase a unitary keyring.
+ Securely erase the keyring.
"""
# TODO: implement some kind of wiping of data or a more
# secure way that
@@ -153,9 +151,9 @@ class TempGPGWrapper(object):
raise
finally:
- leap_assert(self._gpg.gnupghome != os.path.expanduser('~/.gnupg'),
+ leap_assert(self._gpg.homedir != os.path.expanduser('~/.gnupg'),
"watch out! Tried to remove default gnupg home!")
- shutil.rmtree(self._gpg.gnupghome)
+ shutil.rmtree(self._gpg.homedir)
def _build_key_from_gpg(address, key, key_data):
@@ -406,16 +404,16 @@ class OpenPGPScheme(EncryptionScheme):
def _temporary_gpgwrapper(self, keys=None):
"""
- Returns a unitary gpg wrapper that implements context manager
- protocol.
+ Return a gpg wrapper that implements the context manager protocol and
+ contains C{keys}.
:param key_data: ASCII armored key data.
:type key_data: str
:param gpgbinary: Name for GnuPG binary executable.
:type gpgbinary: C{str}
- :return: a GPGWrapper instance
- :rtype: GPGWrapper
+ :return: a TempGPGWrapper instance
+ :rtype: TempGPGWrapper
"""
# TODO do here checks on key_data
return TempGPGWrapper(
@@ -459,8 +457,9 @@ class OpenPGPScheme(EncryptionScheme):
with self._temporary_gpgwrapper(keys) as gpg:
result = gpg.encrypt(
data, pubkey.fingerprint,
- sign=sign.key_id if sign else None,
- passphrase=passphrase, symmetric=False)
+ default_key=sign.key_id if sign else None,
+ passphrase=passphrase, symmetric=False,
+ cipher_algo='AES256')
# Here we cannot assert for correctness of sig because the sig is
# in the ciphertext.
# result.ok - (bool) indicates if the operation succeeded
@@ -492,7 +491,8 @@ class OpenPGPScheme(EncryptionScheme):
leap_assert(verify.private is False)
keys.append(verify)
with self._temporary_gpgwrapper(keys) as gpg:
- result = gpg.decrypt(data, passphrase=passphrase)
+ result = gpg.decrypt(
+ data, passphrase=passphrase, always_trust=True)
self._assert_gpg_result_ok(result)
# verify signature
if (verify is not None):
@@ -514,7 +514,8 @@ class OpenPGPScheme(EncryptionScheme):
:rtype: bool
"""
with self._temporary_gpgwrapper() as gpg:
- return gpg.is_encrypted_asym(data)
+ gpgutil = GPGUtilities(gpg)
+ return gpgutil.is_encrypted_asym(data)
def sign(self, data, privkey):
"""
@@ -535,7 +536,7 @@ class OpenPGPScheme(EncryptionScheme):
# result.fingerprint - contains the fingerprint of the key used to
# sign.
with self._temporary_gpgwrapper(privkey) as gpg:
- result = gpg.sign(data, keyid=privkey.key_id)
+ result = gpg.sign(data, default_key=privkey.key_id)
rfprint = privkey.fingerprint
privkey = gpg.list_keys(secret=True).pop()
kfprint = privkey['fingerprint']
diff --git a/keymanager/src/leap/keymanager/tests/test_keymanager.py b/keymanager/src/leap/keymanager/tests/test_keymanager.py
index 5f232fe..2512604 100644
--- a/keymanager/src/leap/keymanager/tests/test_keymanager.py
+++ b/keymanager/src/leap/keymanager/tests/test_keymanager.py
@@ -28,7 +28,6 @@ from leap.keymanager import (
KeyManager,
openpgp,
KeyNotFound,
- NoPasswordGiven,
errors,
)
from leap.keymanager.openpgp import OpenPGPKey