bbf6d9b026
Bugfix for feeds
- removed categories related and up
- load new books now working
- category random now working
login page is free of non accessible elements
boolean custom column is vivible in UI
books with only with certain languages can be shown
book shelfs can be deleted from UI
Anonymous user view is more resticted
Added browse of series in sidebar
Dependencys in vendor folder are updated to newer versions (licencs files are now present)
Bugfix editing Authors names
Made upload on windows working
359 lines
12 KiB
Python
359 lines
12 KiB
Python
'''SSL with SNI_-support for Python 2. Follow these instructions if you would
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like to verify SSL certificates in Python 2. Note, the default libraries do
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*not* do certificate checking; you need to do additional work to validate
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certificates yourself.
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This needs the following packages installed:
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* pyOpenSSL (tested with 0.13)
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* ndg-httpsclient (tested with 0.3.2)
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* pyasn1 (tested with 0.1.6)
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You can install them with the following command:
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pip install pyopenssl ndg-httpsclient pyasn1
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To activate certificate checking, call
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:func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code
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before you begin making HTTP requests. This can be done in a ``sitecustomize``
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module, or at any other time before your application begins using ``urllib3``,
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like this::
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try:
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import urllib3.contrib.pyopenssl
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urllib3.contrib.pyopenssl.inject_into_urllib3()
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except ImportError:
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pass
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Now you can use :mod:`urllib3` as you normally would, and it will support SNI
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when the required modules are installed.
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Activating this module also has the positive side effect of disabling SSL/TLS
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compression in Python 2 (see `CRIME attack`_).
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If you want to configure the default list of supported cipher suites, you can
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set the ``urllib3.contrib.pyopenssl.DEFAULT_SSL_CIPHER_LIST`` variable.
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Module Variables
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----------------
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:var DEFAULT_SSL_CIPHER_LIST: The list of supported SSL/TLS cipher suites.
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.. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication
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.. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit)
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'''
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from __future__ import absolute_import
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try:
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from ndg.httpsclient.ssl_peer_verification import SUBJ_ALT_NAME_SUPPORT
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from ndg.httpsclient.subj_alt_name import SubjectAltName as BaseSubjectAltName
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except SyntaxError as e:
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raise ImportError(e)
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import OpenSSL.SSL
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from pyasn1.codec.der import decoder as der_decoder
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from pyasn1.type import univ, constraint
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from socket import timeout, error as SocketError
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try: # Platform-specific: Python 2
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from socket import _fileobject
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except ImportError: # Platform-specific: Python 3
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_fileobject = None
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from urllib3.packages.backports.makefile import backport_makefile
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import ssl
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import select
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import six
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from .. import connection
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from .. import util
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__all__ = ['inject_into_urllib3', 'extract_from_urllib3']
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# SNI only *really* works if we can read the subjectAltName of certificates.
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HAS_SNI = SUBJ_ALT_NAME_SUPPORT
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# Map from urllib3 to PyOpenSSL compatible parameter-values.
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_openssl_versions = {
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ssl.PROTOCOL_SSLv23: OpenSSL.SSL.SSLv23_METHOD,
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ssl.PROTOCOL_TLSv1: OpenSSL.SSL.TLSv1_METHOD,
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}
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if hasattr(ssl, 'PROTOCOL_TLSv1_1') and hasattr(OpenSSL.SSL, 'TLSv1_1_METHOD'):
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_openssl_versions[ssl.PROTOCOL_TLSv1_1] = OpenSSL.SSL.TLSv1_1_METHOD
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if hasattr(ssl, 'PROTOCOL_TLSv1_2') and hasattr(OpenSSL.SSL, 'TLSv1_2_METHOD'):
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_openssl_versions[ssl.PROTOCOL_TLSv1_2] = OpenSSL.SSL.TLSv1_2_METHOD
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try:
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_openssl_versions.update({ssl.PROTOCOL_SSLv3: OpenSSL.SSL.SSLv3_METHOD})
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except AttributeError:
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pass
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_openssl_verify = {
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ssl.CERT_NONE: OpenSSL.SSL.VERIFY_NONE,
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ssl.CERT_OPTIONAL: OpenSSL.SSL.VERIFY_PEER,
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ssl.CERT_REQUIRED:
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OpenSSL.SSL.VERIFY_PEER + OpenSSL.SSL.VERIFY_FAIL_IF_NO_PEER_CERT,
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}
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DEFAULT_SSL_CIPHER_LIST = util.ssl_.DEFAULT_CIPHERS.encode('ascii')
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# OpenSSL will only write 16K at a time
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SSL_WRITE_BLOCKSIZE = 16384
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orig_util_HAS_SNI = util.HAS_SNI
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orig_connection_ssl_wrap_socket = connection.ssl_wrap_socket
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def inject_into_urllib3():
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'Monkey-patch urllib3 with PyOpenSSL-backed SSL-support.'
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connection.ssl_wrap_socket = ssl_wrap_socket
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util.HAS_SNI = HAS_SNI
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util.IS_PYOPENSSL = True
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def extract_from_urllib3():
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'Undo monkey-patching by :func:`inject_into_urllib3`.'
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connection.ssl_wrap_socket = orig_connection_ssl_wrap_socket
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util.HAS_SNI = orig_util_HAS_SNI
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util.IS_PYOPENSSL = False
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# Note: This is a slightly bug-fixed version of same from ndg-httpsclient.
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class SubjectAltName(BaseSubjectAltName):
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'''ASN.1 implementation for subjectAltNames support'''
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# There is no limit to how many SAN certificates a certificate may have,
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# however this needs to have some limit so we'll set an arbitrarily high
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# limit.
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sizeSpec = univ.SequenceOf.sizeSpec + \
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constraint.ValueSizeConstraint(1, 1024)
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# Note: This is a slightly bug-fixed version of same from ndg-httpsclient.
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def get_subj_alt_name(peer_cert):
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# Search through extensions
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dns_name = []
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if not SUBJ_ALT_NAME_SUPPORT:
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return dns_name
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general_names = SubjectAltName()
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for i in range(peer_cert.get_extension_count()):
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ext = peer_cert.get_extension(i)
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ext_name = ext.get_short_name()
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if ext_name != b'subjectAltName':
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continue
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# PyOpenSSL returns extension data in ASN.1 encoded form
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ext_dat = ext.get_data()
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decoded_dat = der_decoder.decode(ext_dat,
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asn1Spec=general_names)
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for name in decoded_dat:
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if not isinstance(name, SubjectAltName):
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continue
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for entry in range(len(name)):
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component = name.getComponentByPosition(entry)
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if component.getName() != 'dNSName':
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continue
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dns_name.append(str(component.getComponent()))
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return dns_name
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class WrappedSocket(object):
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'''API-compatibility wrapper for Python OpenSSL's Connection-class.
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Note: _makefile_refs, _drop() and _reuse() are needed for the garbage
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collector of pypy.
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'''
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def __init__(self, connection, socket, suppress_ragged_eofs=True):
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self.connection = connection
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self.socket = socket
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self.suppress_ragged_eofs = suppress_ragged_eofs
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self._makefile_refs = 0
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self._closed = False
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def fileno(self):
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return self.socket.fileno()
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# Copy-pasted from Python 3.5 source code
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def _decref_socketios(self):
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if self._makefile_refs > 0:
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self._makefile_refs -= 1
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if self._closed:
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self.close()
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def recv(self, *args, **kwargs):
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try:
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data = self.connection.recv(*args, **kwargs)
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except OpenSSL.SSL.SysCallError as e:
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if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
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return b''
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else:
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raise SocketError(str(e))
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except OpenSSL.SSL.ZeroReturnError as e:
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if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
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return b''
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else:
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raise
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except OpenSSL.SSL.WantReadError:
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rd, wd, ed = select.select(
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[self.socket], [], [], self.socket.gettimeout())
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if not rd:
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raise timeout('The read operation timed out')
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else:
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return self.recv(*args, **kwargs)
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else:
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return data
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def recv_into(self, *args, **kwargs):
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try:
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return self.connection.recv_into(*args, **kwargs)
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except OpenSSL.SSL.SysCallError as e:
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if self.suppress_ragged_eofs and e.args == (-1, 'Unexpected EOF'):
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return 0
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else:
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raise SocketError(str(e))
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except OpenSSL.SSL.ZeroReturnError as e:
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if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
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return 0
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else:
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raise
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except OpenSSL.SSL.WantReadError:
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rd, wd, ed = select.select(
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[self.socket], [], [], self.socket.gettimeout())
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if not rd:
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raise timeout('The read operation timed out')
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else:
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return self.recv_into(*args, **kwargs)
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def settimeout(self, timeout):
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return self.socket.settimeout(timeout)
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def _send_until_done(self, data):
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while True:
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try:
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return self.connection.send(data)
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except OpenSSL.SSL.WantWriteError:
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_, wlist, _ = select.select([], [self.socket], [],
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self.socket.gettimeout())
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if not wlist:
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raise timeout()
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continue
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def sendall(self, data):
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total_sent = 0
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while total_sent < len(data):
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sent = self._send_until_done(data[total_sent:total_sent + SSL_WRITE_BLOCKSIZE])
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total_sent += sent
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def shutdown(self):
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# FIXME rethrow compatible exceptions should we ever use this
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self.connection.shutdown()
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def close(self):
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if self._makefile_refs < 1:
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try:
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self._closed = True
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return self.connection.close()
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except OpenSSL.SSL.Error:
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return
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else:
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self._makefile_refs -= 1
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def getpeercert(self, binary_form=False):
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x509 = self.connection.get_peer_certificate()
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if not x509:
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return x509
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if binary_form:
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return OpenSSL.crypto.dump_certificate(
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OpenSSL.crypto.FILETYPE_ASN1,
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x509)
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return {
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'subject': (
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(('commonName', x509.get_subject().CN),),
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),
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'subjectAltName': [
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('DNS', value)
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for value in get_subj_alt_name(x509)
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]
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}
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def _reuse(self):
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self._makefile_refs += 1
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def _drop(self):
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if self._makefile_refs < 1:
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self.close()
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else:
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self._makefile_refs -= 1
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if _fileobject: # Platform-specific: Python 2
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def makefile(self, mode, bufsize=-1):
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self._makefile_refs += 1
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return _fileobject(self, mode, bufsize, close=True)
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else: # Platform-specific: Python 3
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makefile = backport_makefile
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WrappedSocket.makefile = makefile
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def _verify_callback(cnx, x509, err_no, err_depth, return_code):
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return err_no == 0
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def ssl_wrap_socket(sock, keyfile=None, certfile=None, cert_reqs=None,
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ca_certs=None, server_hostname=None,
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ssl_version=None, ca_cert_dir=None):
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ctx = OpenSSL.SSL.Context(_openssl_versions[ssl_version])
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if certfile:
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keyfile = keyfile or certfile # Match behaviour of the normal python ssl library
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ctx.use_certificate_file(certfile)
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if keyfile:
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ctx.use_privatekey_file(keyfile)
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if cert_reqs != ssl.CERT_NONE:
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ctx.set_verify(_openssl_verify[cert_reqs], _verify_callback)
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if ca_certs or ca_cert_dir:
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try:
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ctx.load_verify_locations(ca_certs, ca_cert_dir)
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except OpenSSL.SSL.Error as e:
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raise ssl.SSLError('bad ca_certs: %r' % ca_certs, e)
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else:
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ctx.set_default_verify_paths()
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# Disable TLS compression to mitigate CRIME attack (issue #309)
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OP_NO_COMPRESSION = 0x20000
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ctx.set_options(OP_NO_COMPRESSION)
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# Set list of supported ciphersuites.
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ctx.set_cipher_list(DEFAULT_SSL_CIPHER_LIST)
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cnx = OpenSSL.SSL.Connection(ctx, sock)
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if isinstance(server_hostname, six.text_type): # Platform-specific: Python 3
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server_hostname = server_hostname.encode('utf-8')
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cnx.set_tlsext_host_name(server_hostname)
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cnx.set_connect_state()
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while True:
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try:
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cnx.do_handshake()
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except OpenSSL.SSL.WantReadError:
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rd, _, _ = select.select([sock], [], [], sock.gettimeout())
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if not rd:
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raise timeout('select timed out')
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continue
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except OpenSSL.SSL.Error as e:
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raise ssl.SSLError('bad handshake: %r' % e)
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break
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return WrappedSocket(cnx, sock)
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