diff options
Diffstat (limited to 'src/leap/keymanager/openpgp.py')
| -rw-r--r-- | src/leap/keymanager/openpgp.py | 40 |
1 files changed, 29 insertions, 11 deletions
diff --git a/src/leap/keymanager/openpgp.py b/src/leap/keymanager/openpgp.py index d648137..9064043 100644 --- a/src/leap/keymanager/openpgp.py +++ b/src/leap/keymanager/openpgp.py @@ -27,9 +27,11 @@ import io from datetime import datetime +from multiprocessing import cpu_count from gnupg import GPG from gnupg.gnupg import GPGUtilities from twisted.internet import defer +from twisted.internet.threads import deferToThread from leap.common.check import leap_assert, leap_assert_type, leap_check from leap.keymanager import errors @@ -55,6 +57,16 @@ logger = logging.getLogger(__name__) # A temporary GPG keyring wrapped to provide OpenPGP functionality. # +# This function will be used to call blocking GPG functions outside +# of Twisted reactor and match the concurrent calls to the amount of CPU cores +cpu_core_semaphore = defer.DeferredSemaphore(cpu_count()) + + +def from_thread(func, *args, **kwargs): + call = lambda: deferToThread(func, *args, **kwargs) + return cpu_core_semaphore.run(call) + + class TempGPGWrapper(object): """ A context manager that wraps a temporary GPG keyring which only contains @@ -253,6 +265,7 @@ class OpenPGPScheme(EncryptionScheme): # make sure the key does not already exist leap_assert(is_address(address), 'Not an user address: %s' % address) + @defer.inlineCallbacks def _gen_key(_): with TempGPGWrapper(gpgbinary=self._gpgbinary) as gpg: # TODO: inspect result, or use decorator @@ -264,7 +277,7 @@ class OpenPGPScheme(EncryptionScheme): name_comment='') logger.info("About to generate keys... " "This might take SOME time.") - gpg.gen_key(params) + yield from_thread(gpg.gen_key, params) logger.info("Keys for %s have been successfully " "generated." % (address,)) pubkeys = gpg.list_keys() @@ -293,7 +306,7 @@ class OpenPGPScheme(EncryptionScheme): gpg.export_keys(key['fingerprint'], secret=secret)) d = self.put_key(openpgp_key, address) deferreds.append(d) - return defer.gatherResults(deferreds) + yield defer.gatherResults(deferreds) def key_already_exists(_): raise errors.KeyAlreadyExists(address) @@ -686,6 +699,7 @@ class OpenPGPScheme(EncryptionScheme): raise errors.GPGError( 'Failed to encrypt/decrypt: %s' % stderr) + @defer.inlineCallbacks def encrypt(self, data, pubkey, passphrase=None, sign=None, cipher_algo='AES256'): """ @@ -700,8 +714,8 @@ class OpenPGPScheme(EncryptionScheme): :param cipher_algo: The cipher algorithm to use. :type cipher_algo: str - :return: The encrypted data. - :rtype: str + :return: A Deferred that will be fired with the encrypted data. + :rtype: defer.Deferred :raise EncryptError: Raised if failed encrypting for some reason. """ @@ -713,7 +727,8 @@ class OpenPGPScheme(EncryptionScheme): leap_assert(sign.private is True) keys.append(sign) with TempGPGWrapper(keys, self._gpgbinary) as gpg: - result = gpg.encrypt( + result = yield from_thread( + gpg.encrypt, data, pubkey.fingerprint, default_key=sign.key_id if sign else None, passphrase=passphrase, symmetric=False, @@ -724,11 +739,12 @@ class OpenPGPScheme(EncryptionScheme): # result.data - (bool) contains the result of the operation try: self._assert_gpg_result_ok(result) - return result.data + defer.returnValue(result.data) except errors.GPGError as e: logger.error('Failed to decrypt: %s.' % str(e)) raise errors.EncryptError() + @defer.inlineCallbacks def decrypt(self, data, privkey, passphrase=None, verify=None): """ Decrypt C{data} using private @{privkey} and verify with C{verify} key. @@ -743,8 +759,9 @@ class OpenPGPScheme(EncryptionScheme): :param verify: The key used to verify a signature. :type verify: OpenPGPKey - :return: The decrypted data and if signature verifies - :rtype: (unicode, bool) + :return: Deferred that will fire with the decrypted data and + if signature verifies (unicode, bool) + :rtype: Deferred :raise DecryptError: Raised if failed decrypting for some reason. """ @@ -756,8 +773,9 @@ class OpenPGPScheme(EncryptionScheme): keys.append(verify) with TempGPGWrapper(keys, self._gpgbinary) as gpg: try: - result = gpg.decrypt( - data, passphrase=passphrase, always_trust=True) + result = yield from_thread(gpg.decrypt, + data, passphrase=passphrase, + always_trust=True) self._assert_gpg_result_ok(result) # verify signature @@ -767,7 +785,7 @@ class OpenPGPScheme(EncryptionScheme): verify.fingerprint == result.pubkey_fingerprint): sign_valid = True - return (result.data, sign_valid) + defer.returnValue((result.data, sign_valid)) except errors.GPGError as e: logger.error('Failed to decrypt: %s.' % str(e)) raise errors.DecryptError(str(e)) |