This file is indexed.

/usr/lib/python2.7/dist-packages/gevent/ssl.py is in python-gevent 1.0.1-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
# Wrapper module for _ssl. Written by Bill Janssen.
# Ported to gevent by Denis Bilenko.
"""SSL wrapper for socket objects.

For the documentation, refer to :mod:`ssl` module manual.

This module implements cooperative SSL socket wrappers.
On Python 2.6 and newer it uses Python's native :mod:`ssl` module. On Python 2.5 and 2.4
it requires `ssl package`_ to be installed.

.. _`ssl package`: http://pypi.python.org/pypi/ssl
"""

from __future__ import absolute_import
import ssl as __ssl__

try:
    _ssl = __ssl__._ssl
except AttributeError:
    _ssl = __ssl__._ssl2

import sys
import errno
from gevent.socket import socket, _fileobject, timeout_default
from gevent.socket import error as socket_error
from gevent.hub import string_types


__implements__ = ['SSLSocket',
                  'wrap_socket',
                  'get_server_certificate',
                  'sslwrap_simple']

__imports__ = ['SSLError',
               'RAND_status',
               'RAND_egd',
               'RAND_add',
               'cert_time_to_seconds',
               'get_protocol_name',
               'DER_cert_to_PEM_cert',
               'PEM_cert_to_DER_cert']

for name in __imports__[:]:
    try:
        value = getattr(__ssl__, name)
        globals()[name] = value
    except AttributeError:
        __imports__.remove(name)

for name in dir(__ssl__):
    if not name.startswith('_'):
        value = getattr(__ssl__, name)
        if isinstance(value, (int, long, tuple)) or isinstance(value, string_types):
            globals()[name] = value
            __imports__.append(name)

del name, value

__all__ = __implements__ + __imports__


class SSLSocket(socket):

    def __init__(self, sock, keyfile=None, certfile=None,
                 server_side=False, cert_reqs=CERT_NONE,
                 ssl_version=PROTOCOL_SSLv23, ca_certs=None,
                 do_handshake_on_connect=True,
                 suppress_ragged_eofs=True,
                 ciphers=None):
        socket.__init__(self, _sock=sock)

        if certfile and not keyfile:
            keyfile = certfile
        # see if it's connected
        try:
            socket.getpeername(self)
        except socket_error, e:
            if e[0] != errno.ENOTCONN:
                raise
            # no, no connection yet
            self._sslobj = None
        else:
            # yes, create the SSL object
            ctx = SSLContext(ssl_version)
            if keyfile or certfile:
                ctx.load_cert_chain(certfile, keyfile)
            if ca_certs:
                ctx.load_verify_locations(ca_certs)
            if ciphers:
                ctx.set_ciphers(ciphers)
            self._sslobj = ctx._wrap_socket(self._sock, server_side=server_side)
            if do_handshake_on_connect:
                self.do_handshake()
        self.keyfile = keyfile
        self.certfile = certfile
        self.cert_reqs = cert_reqs
        self.ssl_version = ssl_version
        self.ca_certs = ca_certs
        self.ciphers = ciphers
        self.do_handshake_on_connect = do_handshake_on_connect
        self.suppress_ragged_eofs = suppress_ragged_eofs
        self._makefile_refs = 0

    def read(self, len=1024):
        """Read up to LEN bytes and return them.
        Return zero-length string on EOF."""
        while True:
            try:
                return self._sslobj.read(len)
            except SSLError:
                ex = sys.exc_info()[1]
                if ex.args[0] == SSL_ERROR_EOF and self.suppress_ragged_eofs:
                    return ''
                elif ex.args[0] == SSL_ERROR_WANT_READ:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._read_event, timeout_exc=_SSLErrorReadTimeout)
                elif ex.args[0] == SSL_ERROR_WANT_WRITE:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    # note: using _SSLErrorReadTimeout rather than _SSLErrorWriteTimeout below is intentional
                    self._wait(self._write_event, timeout_exc=_SSLErrorReadTimeout)
                else:
                    raise

    def write(self, data):
        """Write DATA to the underlying SSL channel.  Returns
        number of bytes of DATA actually transmitted."""
        while True:
            try:
                return self._sslobj.write(data)
            except SSLError:
                ex = sys.exc_info()[1]
                if ex.args[0] == SSL_ERROR_WANT_READ:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._read_event, timeout_exc=_SSLErrorWriteTimeout)
                elif ex.args[0] == SSL_ERROR_WANT_WRITE:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._write_event, timeout_exc=_SSLErrorWriteTimeout)
                else:
                    raise

    def getpeercert(self, binary_form=False):
        """Returns a formatted version of the data in the
        certificate provided by the other end of the SSL channel.
        Return None if no certificate was provided, {} if a
        certificate was provided, but not validated."""
        return self._sslobj.peer_certificate(binary_form)

    def cipher(self):
        if not self._sslobj:
            return None
        else:
            return self._sslobj.cipher()

    def send(self, data, flags=0, timeout=timeout_default):
        if timeout is timeout_default:
            timeout = self.timeout
        if self._sslobj:
            if flags != 0:
                raise ValueError(
                    "non-zero flags not allowed in calls to send() on %s" %
                    self.__class__)
            while True:
                try:
                    v = self._sslobj.write(data)
                except SSLError:
                    x = sys.exc_info()[1]
                    if x.args[0] == SSL_ERROR_WANT_READ:
                        if self.timeout == 0.0:
                            return 0
                        sys.exc_clear()
                        self._wait(self._read_event)
                    elif x.args[0] == SSL_ERROR_WANT_WRITE:
                        if self.timeout == 0.0:
                            return 0
                        sys.exc_clear()
                        self._wait(self._write_event)
                    else:
                        raise
                else:
                    return v
        else:
            return socket.send(self, data, flags, timeout)
    # is it possible for sendall() to send some data without encryption if another end shut down SSL?

    def sendto(self, *args):
        if self._sslobj:
            raise ValueError("sendto not allowed on instances of %s" %
                             self.__class__)
        else:
            return socket.sendto(self, *args)

    def recv(self, buflen=1024, flags=0):
        if self._sslobj:
            if flags != 0:
                raise ValueError(
                    "non-zero flags not allowed in calls to recv() on %s" %
                    self.__class__)
            # QQQ Shouldn't we wrap the SSL_WANT_READ errors as socket.timeout errors to match socket.recv's behavior?
            return self.read(buflen)
        else:
            return socket.recv(self, buflen, flags)

    def recv_into(self, buffer, nbytes=None, flags=0):
        if buffer and (nbytes is None):
            nbytes = len(buffer)
        elif nbytes is None:
            nbytes = 1024
        if self._sslobj:
            if flags != 0:
                raise ValueError(
                    "non-zero flags not allowed in calls to recv_into() on %s" %
                    self.__class__)
            while True:
                try:
                    tmp_buffer = self.read(nbytes)
                    v = len(tmp_buffer)
                    buffer[:v] = tmp_buffer
                    return v
                except SSLError:
                    x = sys.exc_info()[1]
                    if x.args[0] == SSL_ERROR_WANT_READ:
                        if self.timeout == 0.0:
                            raise
                        sys.exc_clear()
                        self._wait(self._read_event)
                        continue
                    else:
                        raise
        else:
            return socket.recv_into(self, buffer, nbytes, flags)

    def recvfrom(self, *args):
        if self._sslobj:
            raise ValueError("recvfrom not allowed on instances of %s" %
                             self.__class__)
        else:
            return socket.recvfrom(self, *args)

    def recvfrom_into(self, *args):
        if self._sslobj:
            raise ValueError("recvfrom_into not allowed on instances of %s" %
                             self.__class__)
        else:
            return socket.recvfrom_into(self, *args)

    def pending(self):
        if self._sslobj:
            return self._sslobj.pending()
        else:
            return 0

    def _sslobj_shutdown(self):
        while True:
            try:
                return self._sslobj.shutdown()
            except SSLError:
                ex = sys.exc_info()[1]
                if ex.args[0] == SSL_ERROR_EOF and self.suppress_ragged_eofs:
                    return ''
                elif ex.args[0] == SSL_ERROR_WANT_READ:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._read_event, timeout_exc=_SSLErrorReadTimeout)
                elif ex.args[0] == SSL_ERROR_WANT_WRITE:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._write_event, timeout_exc=_SSLErrorWriteTimeout)
                else:
                    raise

    def unwrap(self):
        if self._sslobj:
            s = self._sslobj_shutdown()
            self._sslobj = None
            return socket(_sock=s)
        else:
            raise ValueError("No SSL wrapper around " + str(self))

    def shutdown(self, how):
        self._sslobj = None
        socket.shutdown(self, how)

    def close(self):
        if self._makefile_refs < 1:
            self._sslobj = None
            socket.close(self)
        else:
            self._makefile_refs -= 1

    def do_handshake(self):
        """Perform a TLS/SSL handshake."""
        while True:
            try:
                return self._sslobj.do_handshake()
            except SSLError:
                ex = sys.exc_info()[1]
                if ex.args[0] == SSL_ERROR_WANT_READ:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._read_event, timeout_exc=_SSLErrorHandshakeTimeout)
                elif ex.args[0] == SSL_ERROR_WANT_WRITE:
                    if self.timeout == 0.0:
                        raise
                    sys.exc_clear()
                    self._wait(self._write_event, timeout_exc=_SSLErrorHandshakeTimeout)
                else:
                    raise

    def connect(self, addr):
        """Connects to remote ADDR, and then wraps the connection in
        an SSL channel."""
        # Here we assume that the socket is client-side, and not
        # connected at the time of the call.  We connect it, then wrap it.
        if self._sslobj:
            raise ValueError("attempt to connect already-connected SSLSocket!")
        socket.connect(self, addr)
        if self.ciphers is None:
            self._sslobj = _ssl.sslwrap(self._sock, False, self.keyfile, self.certfile,
                                        self.cert_reqs, self.ssl_version,
                                        self.ca_certs)
        else:
            self._sslobj = _ssl.sslwrap(self._sock, False, self.keyfile, self.certfile,
                                        self.cert_reqs, self.ssl_version,
                                        self.ca_certs, self.ciphers)
        if self.do_handshake_on_connect:
            self.do_handshake()

    def accept(self):
        """Accepts a new connection from a remote client, and returns
        a tuple containing that new connection wrapped with a server-side
        SSL channel, and the address of the remote client."""
        newsock, addr = socket.accept(self)
        return (SSLSocket(newsock._sock,
                          keyfile=self.keyfile,
                          certfile=self.certfile,
                          server_side=True,
                          cert_reqs=self.cert_reqs,
                          ssl_version=self.ssl_version,
                          ca_certs=self.ca_certs,
                          do_handshake_on_connect=self.do_handshake_on_connect,
                          suppress_ragged_eofs=self.suppress_ragged_eofs,
                          ciphers=self.ciphers),
                addr)

    def makefile(self, mode='r', bufsize=-1):
        """Make and return a file-like object that
        works with the SSL connection.  Just use the code
        from the socket module."""
        self._makefile_refs += 1
        # close=True so as to decrement the reference count when done with
        # the file-like object.
        return _fileobject(self, mode, bufsize, close=True)


_SSLErrorReadTimeout = SSLError('The read operation timed out')
_SSLErrorWriteTimeout = SSLError('The write operation timed out')
_SSLErrorHandshakeTimeout = SSLError('The handshake operation timed out')


def wrap_socket(sock, keyfile=None, certfile=None,
                server_side=False, cert_reqs=CERT_NONE,
                ssl_version=PROTOCOL_SSLv23, ca_certs=None,
                do_handshake_on_connect=True,
                suppress_ragged_eofs=True, ciphers=None):
    """Create a new :class:`SSLSocket` instance."""
    return SSLSocket(sock, keyfile=keyfile, certfile=certfile,
                     server_side=server_side, cert_reqs=cert_reqs,
                     ssl_version=ssl_version, ca_certs=ca_certs,
                     do_handshake_on_connect=do_handshake_on_connect,
                     suppress_ragged_eofs=suppress_ragged_eofs,
                     ciphers=ciphers)


def get_server_certificate(addr, ssl_version=PROTOCOL_SSLv23, ca_certs=None):
    """Retrieve the certificate from the server at the specified address,
    and return it as a PEM-encoded string.
    If 'ca_certs' is specified, validate the server cert against it.
    If 'ssl_version' is specified, use it in the connection attempt."""

    host, port = addr
    if (ca_certs is not None):
        cert_reqs = CERT_REQUIRED
    else:
        cert_reqs = CERT_NONE
    s = wrap_socket(socket(), ssl_version=ssl_version,
                    cert_reqs=cert_reqs, ca_certs=ca_certs)
    s.connect(addr)
    dercert = s.getpeercert(True)
    s.close()
    return DER_cert_to_PEM_cert(dercert)


def sslwrap_simple(sock, keyfile=None, certfile=None):
    """A replacement for the old socket.ssl function.  Designed
    for compability with Python 2.5 and earlier.  Will disappear in
    Python 3.0."""
    return SSLSocket(sock, keyfile, certfile)