###
# Copyright (c) 2005, Ali Afshar
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * 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.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
###

import os

try:
    from OpenSSL import SSL
except ImportError:
    raise Exception, 'PyOpenSSL must be installed to use SSL'

class SBSSLContextFactory:
    """ Context for providing SSL wrapping with OpenSSL """
    def getContext(self):
        """Create an SSL context.
        This is a sample implementation that loads a certificate from a file""" 
        ctx = SSL.Context(SSL.SSLv23_METHOD)
        ssldir = self.cb.cb.datapaths['keys.ssl']
        filepath = '%s%s%s' % (ssldir, os.sep,
            self.cb.mainRegistryValue('keys.sslCertificateFile'))
        keypath = '%s%s%s' % (ssldir, os.sep,
            self.cb.mainRegistryValue('keys.sslKeyFile'))
        self.cb.cb.log.debug('Using SSL keyfile %s, certfile %s',
            keypath, filepath)
        try:
            ctx.use_certificate_file(filepath)
        except:
            raise Exception, 'Your SSL key file is missing or faulty'
        try:
            ctx.use_privatekey_file(keypath)
        except:
            raise Exception, 'Your SSL certificate file is missing or faulty'
        return ctx

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