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# Copyright (C) 2016-2017 g10 Code GmbH # Copyright (C) 2004 Igor Belyi <belyi@users.sourceforge.net> # Copyright (C) 2002 John Goerzen <jgoerzen@complete.org> # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library 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 # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA from __future__ import absolute_import, print_function, unicode_literals from . import gpgme from . import util del absolute_import, print_function, unicode_literals # To appease static analysis tools, we define some constants here. # They are overwritten with the proper values by process_constants. NO_ERROR = None EOF = None util.process_constants('GPG_ERR_', globals()) del util class GpgError(Exception): """A GPG Error This is the base of all errors thrown by this library. If the error originated from GPGME, then additional information can be found by looking at 'code' for the error code, and 'source' for the errors origin. Suitable constants for comparison are defined in this module. 'code_str' and 'source_str' are human-readable versions of the former two properties. If 'context' is not None, then it contains a human-readable hint as to where the error originated from. If 'results' is not None, it is a tuple containing results of the operation that failed. The tuples elements are the results of the function that raised the error. Some operations return results even though they signal an error. Of course this information must be taken with a grain of salt. But often, this information is useful for diagnostic uses or to give the user feedback. Since the normal control flow is disrupted by the exception, the callee can no longer return results, hence we attach them to the exception objects. """ def __init__(self, error=None, context=None, results=None): self.error = error self.context = context self.results = results @property def code(self): if self.error is None: return None return gpgme.gpgme_err_code(self.error) @property def code_str(self): if self.error is None: return None return gpgme.gpgme_strerror(self.error) @property def source(self): if self.error is None: return None return gpgme.gpgme_err_source(self.error) @property def source_str(self): if self.error is None: return None return gpgme.gpgme_strsource(self.error) def __str__(self): msgs = [] if self.context is not None: msgs.append(self.context) if self.error is not None: msgs.append(self.source_str) msgs.append(self.code_str) return ': '.join(msgs) class GPGMEError(GpgError): '''Generic error This is a generic error that wraps the underlying libraries native error type. It is thrown when the low-level API is invoked and returns an error. This is the error that was used in PyME. ''' @classmethod def fromSyserror(cls): return cls(gpgme.gpgme_err_code_from_syserror()) @property def message(self): return self.context def getstring(self): return str(self) def getcode(self): return self.code def getsource(self): return self.source def errorcheck(retval, extradata=None): if retval: raise GPGMEError(retval, extradata) class KeyNotFound(GPGMEError, KeyError): """Raised if a key was not found GPGME indicates this condition with EOF, which is not very idiomatic. We raise this error that is both a GPGMEError indicating EOF, and a KeyError. """ def __init__(self, keystr): self.keystr = keystr GPGMEError.__init__(self, EOF) def __str__(self): return self.keystr # These errors are raised in the idiomatic interface code. class EncryptionError(GpgError): pass class InvalidRecipients(EncryptionError): def __init__(self, recipients, **kwargs): EncryptionError.__init__(self, **kwargs) self.recipients = recipients def __str__(self): return ", ".join("{}: {}".format(r.fpr, gpgme.gpgme_strerror(r.reason)) for r in self.recipients) class DecryptionError(GpgError): pass class UnsupportedAlgorithm(DecryptionError): def __init__(self, algorithm, **kwargs): DecryptionError.__init__(self, **kwargs) self.algorithm = algorithm def __str__(self): return self.algorithm class SigningError(GpgError): pass class InvalidSigners(SigningError): def __init__(self, signers, **kwargs): SigningError.__init__(self, **kwargs) self.signers = signers def __str__(self): return ", ".join("{}: {}".format(s.fpr, gpgme.gpgme_strerror(s.reason)) for s in self.signers) class VerificationError(GpgError): def __init__(self, result, **kwargs): GpgError.__init__(self, **kwargs) self.result = result class BadSignatures(VerificationError): def __str__(self): return ", ".join("{}: {}".format(s.fpr, gpgme.gpgme_strerror(s.status)) for s in self.result.signatures if s.status != NO_ERROR) class MissingSignatures(VerificationError): def __init__(self, result, missing, **kwargs): VerificationError.__init__(self, result, **kwargs) self.missing = missing def __str__(self): return ", ".join(k.subkeys[0].fpr for k in self.missing)
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