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‎LICENSE

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Apache License
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‎NOTICE

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# CPPL NOTICE file
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## Contributors
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The following persons significantly contributed to the development of CPPL
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* Sascha Schmerling
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* Jens Hiller
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* Martin Henze
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* Yu Qiao
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## Acknowledgements and Disclaimer
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The design and development of CPPL has received funding from the European Union's Horizon 2020 research and innovation programme 2014-2018 under grant agreement No. 644866 (SSICLOPS).
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It reflects only the authors' views and the European Commission is not responsible for any use that may be made of the information it contains.
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## Third Party Code used by CPPL
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### libjson
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The JsonCpp library's source code, including accompanying documentation,
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tests and demonstration applications, are licensed under the following
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conditions...
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The author (Baptiste Lepilleur) explicitly disclaims copyright in all
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jurisdictions which recognize such a disclaimer. In such jurisdictions,
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this software is released into the Public Domain.
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In jurisdictions which do not recognize Public Domain property (e.g. Germany as of
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2010), this software is Copyright (c) 2007-2010 by Baptiste Lepilleur, and is
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released under the terms of the MIT License (see below).
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In jurisdictions which recognize Public Domain property, the user of this
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software may choose to accept it either as 1) Public Domain, 2) under the
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conditions of the MIT License (see below), or 3) under the terms of dual
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Public Domain/MIT License conditions described here, as they choose.
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The MIT License is about as close to Public Domain as a license can get, and is
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described in clear, concise terms at:
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http://en.wikipedia.org/wiki/MIT_License
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The full text of the MIT License follows:
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========================================================================
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Copyright (c) 2007-2010 Baptiste Lepilleur
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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========================================================================
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(END LICENSE TEXT)
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The MIT license is compatible with both the GPL and commercial
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software, affording one all of the rights of Public Domain with the
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minor nuisance of being required to keep the above copyright notice
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and license text in the source code. Note also that by accepting the
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Public Domain "license" you can re-license your copy using whatever
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license you like.
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‎README.md

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## Versions
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This repository contains two versions of CPPL. The first is the version used for the paper with some extensions. The second version is the library form libcppl which is built in `policy-decision-point`. You should use the latter if not explicitly pointed to otherwise.
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This repository contains two versions of CPPL. The first is the version used for the original paper at ACM WPES 2016 with some extensions. The second version is the library form libcppl which is built in `policy-decision-point` and provided the basis for several integration concepts presented in the paper at IEEE IC2E 2018. We suggest the use of the latter if not explicitly pointed to otherwise.
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## Build Instructions
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### Policy Decision Point
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This repository contains a small implementation for a policy decision point (PDP) and minimal client and server functionality.
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Note that the PDP yet does not do anything with the results, i.e., a real PDP would select an appropriate server and forward the request.
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This repository contains a small example implementation for a policy decision point (PDP) and minimal examples for client and server functionality.
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Note that this example PDP does not proceed beyond cppl results, i.e., a fully implemented PDP additionally needs to select an appropriate server (depending on cloud operator specific key performance indicators) and forward the request.
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Similarly, the server would need to check evaluation results (reasons given as json string) and handle data according to these policy evaluation results, e.g., set up triggers for deletion at a specific point in time. As this is use case specific, it must be implemented by the systems integrating CPPL.
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```
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xxd -b examples/example_paper/policy_compressed.ccppl
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```
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# Research papers
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The following research papers present CPPL and it's underlying concepts:
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```
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Martin Henze, Jens Hiller, Sascha Schmerling, Jan Henrik Ziegeldorf and Klaus Wehrle
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CPPL: Compact Privacy Policy Language
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Proceedings of the 15th Workshop on Privacy in the Electronic Society (WPES), co-located with the 23rd ACM Conference on Computer and Communications Security (CCS), Vienna, Austria , page 99-110.
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Publisher: ACM,
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October 2016
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DOI: 10.1145/2994620.2994627
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ISBN: 978-1-4503-4569-9
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```
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```
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Jens Hiller, Mael Kimmerlin, Max Plauth, Seppo Heikkila, Stefan Klauck, Ville Lindfors, Felix Eberhardt, Dariusz Bursztynowski, Jesus Llorente Santos, Oliver Hohlfeld and Klaus Wehrle
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Giving Customers Control over Their Data: Integrating a Policy Language into the Cloud
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Proceedings of the 2018 IEEE International Conference on Cloud Engineering (IC2E 2018), Orlando, Florida, USA
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Publisher: IEEE,
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April 2018
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accepted
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```
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‎ast.hh

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// Copyright 2015-2018 RWTH Aachen University
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/*
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* AST class that represets an abstract syntax tree
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*

‎ast_policy_compressor_visitor.cc

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// Copyright 2015-2018 RWTH Aachen University
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "ast_policy_compressor_visitor.hh"
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void AstPolicyCompressorVisitor::visit(AstOperation &op) {

‎ast_policy_compressor_visitor.hh

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// Copyright 2015-2018 RWTH Aachen University
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "ast.hh"

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