# Copyright (C) 2016-2018 Virgil Security Inc.
#
# Lead Maintainer: Virgil Security Inc. <support@virgilsecurity.com>
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# (1) Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# (2) Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# (3) Neither the name of the copyright holder nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR
# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
# IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
from virgil_crypto.virgil_crypto_python import VirgilDataSink
from virgil_crypto.virgil_crypto_python import VirgilDataSource
[docs]class VirgilStreamDataSink(VirgilDataSink):
def __init__(self, stream):
super(VirgilStreamDataSink, self).__init__()
self.stream = stream
[docs] def isGood(self):
return self.stream.writable()
[docs] def write(self, data):
self.stream.write(bytearray(data))
[docs]class VirgilStreamDataSource(VirgilDataSource):
def __init__(self, stream, buffer_size=1024):
super(VirgilStreamDataSource, self).__init__()
self.stream = stream
self.has_data = True
self.buffer = bytearray(buffer_size)
[docs] def hasData(self):
return self.stream.readable() and self.has_data
[docs] def read(self):
read_count = self.stream.readinto(self.buffer)
if not read_count:
self.has_data = False
return []
return self.buffer[0:read_count]