view mercurial/error.py @ 23069:22db405536be stable

sslutil: only support TLS (BC)

In light of the POODLE[0] attack on SSLv3, let's just drop the ability to
use anything older than TLSv1 entirely.

This only fixes the client side. Another commit will fix the server
side. There are still a few SSLv[23] constants hiding in httpclient,
but I'll fix those separately upstream and import them when we're not
in a code freeze.


0: http://googleonlinesecurity.blogspot.com/2014/10/this-poodle-bites-exploiting-ssl-30.html

# error.py - Mercurial exceptions
#
# Copyright 2005-2008 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

"""Mercurial exceptions.

This allows us to catch exceptions at higher levels without forcing
imports.
"""

# Do not import anything here, please

class RevlogError(Exception):
    pass

class FilteredIndexError(IndexError):
    pass

class LookupError(RevlogError, KeyError):
    def __init__(self, name, index, message):
        self.name = name
        if isinstance(name, str) and len(name) == 20:
            from node import short
            name = short(name)
        RevlogError.__init__(self, '%s@%s: %s' % (index, name, message))

    def __str__(self):
        return RevlogError.__str__(self)

class FilteredLookupError(LookupError):
    pass

class ManifestLookupError(LookupError):
    pass

class CommandError(Exception):
    """Exception raised on errors in parsing the command line."""

class InterventionRequired(Exception):
    """Exception raised when a command requires human intervention."""

class Abort(Exception):
    """Raised if a command needs to print an error and exit."""
    def __init__(self, *args, **kw):
        Exception.__init__(self, *args)
        self.hint = kw.get('hint')

class ConfigError(Abort):
    """Exception raised when parsing config files"""

class OutOfBandError(Exception):
    """Exception raised when a remote repo reports failure"""

class ParseError(Exception):
    """Exception raised when parsing config files (msg[, pos])"""

class RepoError(Exception):
    def __init__(self, *args, **kw):
        Exception.__init__(self, *args)
        self.hint = kw.get('hint')

class RepoLookupError(RepoError):
    pass

class FilteredRepoLookupError(RepoLookupError):
    pass

class CapabilityError(RepoError):
    pass

class RequirementError(RepoError):
    """Exception raised if .hg/requires has an unknown entry."""
    pass

class LockError(IOError):
    def __init__(self, errno, strerror, filename, desc):
        IOError.__init__(self, errno, strerror, filename)
        self.desc = desc

class LockHeld(LockError):
    def __init__(self, errno, filename, desc, locker):
        LockError.__init__(self, errno, 'Lock held', filename, desc)
        self.locker = locker

class LockUnavailable(LockError):
    pass

class ResponseError(Exception):
    """Raised to print an error with part of output and exit."""

class UnknownCommand(Exception):
    """Exception raised if command is not in the command table."""

class AmbiguousCommand(Exception):
    """Exception raised if command shortcut matches more than one command."""

# derived from KeyboardInterrupt to simplify some breakout code
class SignalInterrupt(KeyboardInterrupt):
    """Exception raised on SIGTERM and SIGHUP."""

class SignatureError(Exception):
    pass

class PushRaced(RuntimeError):
    """An exception raised during unbundling that indicate a push race"""

# bundle2 related errors
class BundleValueError(ValueError):
    """error raised when bundle2 cannot be processed"""

class UnsupportedPartError(BundleValueError):
    def __init__(self, parttype=None, params=()):
        self.parttype = parttype
        self.params = params
        if self.parttype is None:
            msg = 'Stream Parameter'
        else:
            msg = parttype
        if self.params:
            msg = '%s - %s' % (msg, ', '.join(self.params))
        ValueError.__init__(self, msg)

class ReadOnlyPartError(RuntimeError):
    """error raised when code tries to alter a part being generated"""
    pass

class CensoredNodeError(RevlogError):
    """error raised when content verification fails on a censored node"""

    def __init__(self, filename, node):
        from node import short
        RevlogError.__init__(self, '%s:%s' % (filename, short(node)))