diff options
Diffstat (limited to 'src/leap/keymanager/openpgp.py')
| -rw-r--r-- | src/leap/keymanager/openpgp.py | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/src/leap/keymanager/openpgp.py b/src/leap/keymanager/openpgp.py index 8ec8639..a4dc1b8 100644 --- a/src/leap/keymanager/openpgp.py +++ b/src/leap/keymanager/openpgp.py @@ -27,9 +27,11 @@ import re import shutil import tempfile import locale +from contextlib import closing from gnupg import GPG from gnupg.gnupg import GPGUtilities +from gnupg._util import _make_binary_stream from leap.common.check import leap_assert, leap_assert_type from leap.keymanager import errors @@ -46,6 +48,10 @@ from leap.keymanager.keys import ( logger = logging.getLogger(__name__) +# +# A temporary GPG keyring wrapped to provide OpenPGP functionality. +# + class TempGPGWrapper(object): """ A context manager that wraps a temporary GPG keyring which only contains @@ -243,7 +249,7 @@ class OpenPGPScheme(EncryptionScheme): key_length=4096, name_real=address, name_email=address, - name_comment='Generated by LEAP Key Manager.') + name_comment='') logger.info("About to generate keys... This might take SOME time.") gpg.gen_key(params) logger.info("Keys for %s have been successfully " @@ -570,15 +576,18 @@ class OpenPGPScheme(EncryptionScheme): '%s != %s' % (rfprint, kfprint)) return result.data - def verify(self, data, pubkey): + def verify(self, data, pubkey, detached_sig=None): """ - Verify signed C{data} with C{pubkey}. + Verify signed C{data} with C{pubkey}, eventually using + C{detached_sig}. :param data: The data to be verified. :type data: str - :param pubkey: The public key to be used on verification. :type pubkey: OpenPGPKey + :param detached_sig: A detached signature. If given, C{data} is + verified against this detached signature. + :type detached_sig: str :return: The ascii-armored signed data. :rtype: str @@ -586,7 +595,18 @@ class OpenPGPScheme(EncryptionScheme): leap_assert_type(pubkey, OpenPGPKey) leap_assert(pubkey.private is False) with self._temporary_gpgwrapper(pubkey) as gpg: - result = gpg.verify(data) + result = None + if detached_sig is None: + result = gpg.verify(data) + else: + # to verify using a detached sig we have to use + # gpg.verify_file(), which receives the data as a binary + # stream and the name of a file containing the signature. + sf, sfname = tempfile.mkstemp() + with os.fdopen(sf, 'w') as sfd: + sfd.write(detached_sig) + with closing(_make_binary_stream(data, gpg._encoding)) as df: + result = gpg.verify_file(df, sig_file=sfname) gpgpubkey = gpg.list_keys().pop() valid = result.valid rfprint = result.fingerprint |