def should_read(self):
# type: () -> int
"""
Returns whether the cause of the condition is the bio
should read more data
"""
return m2.bio_should_read(self.bio)
def should_read(self):
# type: () -> int
"""
Returns whether the cause of the condition is the bio
should read more data
"""
return m2.bio_should_read(self.bio)
def _is_read_connected(self):
"""
Returns True if we're interested in read events.
"""
# While doing initial handshake from ClientHello, we are interested
# in read events internally, even if we have no listeners.
should_read = m2.bio_should_read(self._bio_ssl.obj) if self._bio_ssl else False
return should_read or self._handshake or super(M2TLSSocket, self)._is_read_connected()
def _translate(self, write_bio, write_bio_buf, read_bio, force_write=False):
data = []
encrypting = write_bio is self._bio_ssl
write_bio = write_bio.obj
read_bio = read_bio.obj
while True:
writable = m2.bio_ctrl_get_write_guarantee(write_bio) > 0
if (writable and write_bio_buf) or force_write:
# If force_write is True, we want to start the handshake. We call
# bio_write() even if there's nothing in the buffer, to cause OpenSSL to
# implicitly send the client hello.
chunk = write_bio_buf.pop(0) if write_bio_buf else ''
r = m2.bio_write(write_bio, chunk)
if r <= 0:
# If BIO_write returns <= 0 due to an error condition, it should
# raise. Otherwise we expect bio_should_retry() to return True. Do a
# quick sanity check.
if not m2.bio_should_retry(write_bio):
raise TLSProtocolError('Unexpected internal state: should_retry()'
'is False without error')
if not self._rmon.active and m2.bio_should_read(self._bio_ssl.obj):
# The BIO write failed, the SSL BIO is now telling us we should
# read, and the read monitor is not active. Update the read
# monitor now, which will register with the notifier because the
# SSL BIO should read, allowing us to read from the socket to
# satisfy whatever the underlying SSL protocol is doing.
self._update_read_monitor()
else:
if encrypting:
# We are encrypting user data to send to peer. Require the
# remote end be validated first. We should not normally
# get here until ClientHello is completed successfully.
assert(self._validated)
chunk = chunk[r:]
if chunk:
# Insert remainder of chunk back into the buffer.
write_bio_buf.insert(0, chunk)
pending = m2.bio_ctrl_pending(read_bio)
if not pending:
break
chunk = m2.bio_read(read_bio, pending)
if chunk is not None:
data.append(chunk)
else:
# It's possible for chunk to be None, even though bio_ctrl_pending()
# told us there was data waiting in the BIO. I suspect this happens
# when all the bytes in the BIO are used for the SSL protocol and
# none are user data.
assert(m2.bio_should_retry(read_bio))
return ''.join(data)
def _is_read_connected(self):
"""
Returns True if we're interested in read events.
"""
# While doing initial handshake from ClientHello, we are interested
# in read events internally, even if we have no listeners.
should_read = m2.bio_should_read(
self._bio_ssl.obj) if self._bio_ssl else False
return should_read or self._handshake or super(
M2TLSSocket, self)._is_read_connected()
def should_read(self):
# type: () -> int
"""Should we read more data?"""
return m2.bio_should_read(self.bio)
def _translate(self,
write_bio,
write_bio_buf,
read_bio,
force_write=False):
data = []
encrypting = write_bio is self._bio_ssl
write_bio = write_bio.obj
read_bio = read_bio.obj
while True:
writable = m2.bio_ctrl_get_write_guarantee(write_bio) > 0
if (writable and write_bio_buf) or force_write:
# If force_write is True, we want to start the handshake. We call
# bio_write() even if there's nothing in the buffer, to cause OpenSSL to
# implicitly send the client hello.
chunk = write_bio_buf.pop(0) if write_bio_buf else ''
r = m2.bio_write(write_bio, chunk)
if r <= 0:
# If BIO_write returns <= 0 due to an error condition, it should
# raise. Otherwise we expect bio_should_retry() to return True. Do a
# quick sanity check.
if not m2.bio_should_retry(write_bio):
raise TLSProtocolError(
'Unexpected internal state: should_retry()'
'is False without error')
if not self._rmon.active and m2.bio_should_read(
self._bio_ssl.obj):
# The BIO write failed, the SSL BIO is now telling us we should
# read, and the read monitor is not active. Update the read
# monitor now, which will register with the notifier because the
# SSL BIO should read, allowing us to read from the socket to
# satisfy whatever the underlying SSL protocol is doing.
self._update_read_monitor()
else:
if encrypting:
# We are encrypting user data to send to peer. Require the
# remote end be validated first. We should not normally
# get here until ClientHello is completed successfully.
assert (self._validated)
chunk = chunk[r:]
if chunk:
# Insert remainder of chunk back into the buffer.
write_bio_buf.insert(0, chunk)
pending = m2.bio_ctrl_pending(read_bio)
if not pending:
break
chunk = m2.bio_read(read_bio, pending)
if chunk is not None:
data.append(chunk)
else:
# It's possible for chunk to be None, even though bio_ctrl_pending()
# told us there was data waiting in the BIO. I suspect this happens
# when all the bytes in the BIO are used for the SSL protocol and
# none are user data.
assert (m2.bio_should_retry(read_bio))
return ''.join(data)
def should_read(self):
# type: () -> int
"""Should we read more data?"""
return m2.bio_should_read(self.bio)
