Commit a58cd4b4 authored by cdanger's avatar cdanger
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Initial commit

# Change log
All notable changes to this project are documented in this file following the [Keep a CHANGELOG]( conventions. This project adheres to [Semantic Versioning](
## 12.0.0
### Changed
- Parent project: 6.0.0 -> 7.0.0
- Renamed PDP extension interfaces and base implementations:
* (Base|Closeable)AttributeProviderModule >
* (Base)RequestFilter -> (Base)DecisionRequestPreprocessor
* DecisionResultFilter -> DecisionResultPostprocessor
* CloseablePdp -> CloseablePdpEngine
* (Immutable)PdpDecisionRequest -> (Immutable)DecisionRequest
* PdpDecisionResult -> DecisionResult
* PdpDecisionRequest(Factory|Builder) -> DecisionRequest(Factory|Builder)
* (Base|Closeable)(Static)RefPolicyProviderModule -> (Base|Closeable)(Static)RefPolicyProvider
* RootPolicyProviderModule -> RootPolicyProvider
* (Base)DatatypeFactory(Registry) -> (Base)AttributeValueFactory(Registry) (using new class AttributeDatatype subclass of Datatype)
- Uses of IdReferenceType (for Policy(Set)IdReference) replaced by new interface PrimaryPolicyMetadata (identifies Policy uniquely) in all APIs where necessary
- Moved JaxbXacmlUtils utility class out to authzforce-ce-xacml-model project (renamed to Xacml3JaxbHelper)
- New extensible framework for PDP engine adapters, e.g. for specific types of input/output (SerDes), PDP engine itself made agnostic of request/response serialization formats
* New package for classes related to input/output (SerDes) adapter, e.g. from/to XACML-XML
* New interface PdpEngineInoutAdapter (default implementation is XACML/XML using JAXB API, XACML/JSON one moved to separate project)
- More optimal implementation of XACML integer values: 3 possible
GenericInteger interface implementations depending on maximum (size)
(ArbitrarilyBigInteger for java BigIntegers, MediumInteger for java Integers, and LongInteger for java Longs), with value caching (like Java
Integer/Long). This optimizes memory usage / CPU computation when dealing with XACML integers small enough to fit in Java Integers/Longs.
- Class naming conventions regarding acronyms (only first letter should be uppercase, see also, for example:
* AnyURIValue -> AnyUriValue
* AttributeFQN -> AttributeFqn
* AttributeFQNs -> AttributeFqns
* CloseablePDP -> CloseablePdp
* JaxbXACMLUtils -> JaxbXacmlUtils
* PDPEngine -> PdpEngine
* XMLUtils -> XmlUtils...
## 11.0.0
### Changed
- StaticRefPolicyProviderModule interface to abstract class
- Renamed RefPolicyProvider.Utils class (utility methods for Policy Provider implementations) to RefPolicyProvider.Helper
### Added
- BaseStaticRefPolicyProviderModule class as convenient base class for static Policy Provider (StaticRefPolicyProviderModule ) implementations
## 10.0.0
### Added
- Class AttributeSource and AttributeSources: source of attribute values, e.g. the Request, the PDP, an AttributeProvider module, etc.
- Class AttributeBag: new kind of Bag that represents an attribute bag (values) with metadata such as value source (AttributeSource)
- Interface EvaluationContext: new methods to attach one or more context listeners, and get back the attached listener(s)
- New Expression interface implementations: AttributeDesignatorExpression (XACML AttributeDesignator evaluator) and AttributeSelectorExpression (XACML Attribute Selector evaluator)
### Changed
- Changed POM parent version: 6.0.0.
- Changed DecisionResultFilter interface methods
- Changed RequestFilter interface methods
- Changed DecisionCache interface methods by adding EvaluationContext parameter for context-dependent caches
- Changed RefPolicyProvider interface methods
- Changed PDPEngine interface methods
- Changed EvaluationContext interface methods
- Changed Expression interface methods
- Changed VersionPatterns class methods to return new PolicyVersionPattern class that helps manipulate XACML VersionMatchTypes
- Refactoring:
- Renamed class IndividualDecisionRequest to IndividualXACMLRequest (XACML-specific model of Individual Decision Request)
- Renamed class IndividualPdpDecisionRequest to PdpDecisionRequest (individual request in XACML-agnostic AuthzForce model)
- Renamed class AttributeGUID(s) to AttributeFQN(s) (Fully Qualified Name is more appropriate than GUID)
- Renamed class MutableBag to MutableAttributeBag
## 9.1.0
### Changed
- Changed parent version: v5.1.0:
- License: GPL v3.0 replaced with Apache License v2.0
- Project URL: '' replaced with ''
- GIT repository URL base: '' replaced with ''
- Return type of `Datatype#getTypeParameter()`: `Datatype<?>` replaced with `Optional<Datatype<?>>`
- Return type of `AttributeGUID#getIssuer()`: `String<?>` replaced with `Optional<String<?>>`
## 9.0.0
### Changed
- Changed parent version: 4.1.1 -> 5.0.0
-> Changed dependency versions: SLF4J: 1.7.6 -> 1.7.22; Guava: 20.0 -> 21.0
- Renamed class Pdp to PDPEngine and added methods to evaluate one or multiple Individual Decision Requests using more efficient API than XACML-schema-derived Request
- Renamed class PdpDecisionInput to PdpDecisionRequest -> changed DecisionCache API
- Changed DecisionResultFilter API
## 8.2.0
### Changed
- Parent project version: 4.1.1 (upgrades owasp dep check mvn plugin
version: 1.4.4 ->
- LOG CRLF INJECTION issue (reported by find-sec-bugs) no longer fixed in code but assumed handled
by logback configuration (see Layout pattern 'replace' keyword in logback documentation)
## 8.1.0
### Changed
- Parent project version: 4.0.0 -> 4.1.0 => Saxon-HE dependency version 9.7.0-11 -> 9.7.0-14
### Fixed
- Security issues reported by find-sec-bugs plugin
## 8.0.0
### Added
- Extension mechanism to switch HashMap/HashSet implementation; default implementation is based on native JRE and Guava.
- AtomicValue interface for atomic/primitive values, implemented by Function and AttributeValue
- Public class PrimitiveDatatype for primitive value datatypes
- ConstantExpression interface (replaces ValueExpression) for all constant Value expression
- FunctionExpression interface, Expression wrapper for Functions (Function no longer extends Expression but AtomicValue) like Value
- Function datatype constant in StandardDatatypes class, used as formal parameter type for functions in higher-order functions
- Maven plugin owasp-dependency-check to check vulnerabilities in dependencies
### Changed
- Function no longer extends Expression but AtomicValue since Function Expression is now materialized by new FunctionExpression interface
- Expression interface: method boolean isStatic() replaced by getValue() to get the constant result if expression is static/constant (instead of calling evaluate(null) which forces callers the complexity of handling IndeterminateEvaluationException), null if not
- ExpressionFactory interface: Function return types replaced with FunctionExpression (new interface)
- FirstOrderFunctionCall abstract class (base class for first-order function call implementations): changed to interface and abstract class logic moved to new BaseFirstOrderFunctionCall class,
- DatatypeFactory interface: removed method isExpressionStatic(), now useless since we have new Expression#getValue() method
- CombiningAlg (combining algorithm interface) Evaluator interface: more generic
- Maven parent project version: 3.4.0 -> 4.0.0:
- **Java version: 1.7 -> 1.8** (maven.compiler.source/target property)
- Guava dependency version: 18.0 -> 20.0
- Saxon-HE dependency version: 9.6.0-5 -> 9.7.0-11
- com.sun.mail:javax.mail v1.5.4 changed to com.sun.mail:mailapi v1.5.6
### Removed
- ValueExpression interface, replaced by ConstantExpression
- Dependency on Koloboke, replaced by extension mechanism mentioned in *Added* section that would allow to switch from the default HashMap/HashSet implementation to Koloboke-based.
## 7.1.1
### Fixed
- Javadoc issues
## 7.1.0
### Fixed
- Bag.equals() ignoring duplicates (like XACML set-equals function). Fixed by using Guava Multiset as backend structure and Multiset.equals(), to comply with the mathematical definition of a bag/multiset and XACML definition which is basically the same.
- BaseStaticRootPolicyProviderModule keeping a reference to static refPolicyProvider, although policies are to be resolved statically at initialization time, after that, it is no longer needed. Fix: remove BaseStaticRootPolicyProviderModule to force RootPoliyPovider modules to manage their refPolicyProvider and free memory after use.
### Added
- Bag.elements() method, returns a Multiset (Guava) view of a bag's elements, useful in particular to implement functions with bags like XACML set-*
### Removed
- BaseStaticRootPolicyProviderModule class removed (see fix above)
## 7.0.0
### Added
- Dependency: com.koloboke:koloboke-impl-jdk6-7:1.0.0 for better (performance and API) HashMap/HashSet. More info:
### Changed
- CombiningAlg.Evaluator (Combining Algorithm evaluator interface):
- Return type changed to ExtendedDecision (Decision, Status, Extended Indeterminate if Decision is Indeterminate), simpler than formerly DecisionResult
- evaluate() takes 2 extra "out" parameters: UpdatablePepActions and UpdatableApplicablePolicies used to add/return PEP actions and applicable policies collected during evaluation
- DecisionCache interface: input PdpDecisionInput and output PdpDecisionResult allow to handle 2 new fields: named attributes and extra Content nodes used during evaluation; thus enabling smarter caching possibilities
- EvaluationContext interface: addApplicablePolicy(...) replaced by isApplicablePolicyIdListRequested() because applicable policies are now collected in the new "out" parameter above and in the evaluation results (DecisionResult) returned by Policy evaluators
- Deprecated Expression#getJAXBElement() usually used to get the original XACML from which the Expression was parsed (no longer considered useful)
- Bag#equals() re-implemented like XACML function set-equals
- Change implementation of unmodifidable lists to Guava ImmutableList
- Made all implementations of DecisionResult immutable
## 6.0.0
### Changed
- Project parent version (3.4.0): all JAXB-annotated classes derived from XACML schema now implements interface. This affects subclasses StatusHelper, CombinerParameterEvaluator and concrete XXXValue classes (extending XACML AttributeValue)
- All method parameters made final when applicable
- IndividualDecisionRequest#isApplicablePolicyIdentifiersReturned() method renamed to isApplicablePolicyIdListReturned()
### Removed
- CombiningAlgSet and FunctionSet classes (GitHub issue #1), now useless.
## 5.0.0
### Changed
- Attribute Provider Extension interface (CloseableAttributeProviderModule interface): new parameter to pass global PDP environment properties to AttributeProvider extensions
## 4.0.2
### Fixed
- Code-style issues reported by Codacy
## 4.0.1
### Fixed
- Issues reported by Codacy
## 4.0.0
### Changed
- FirstOrderBagFunctions#getFunctions(): changed parameters to only one of type DatatypeFactory<AV> for simplification
### Fixed
- Current year in license header
## 3.8.0
### Added
- Implementations of XACML 3.0 Core standard data types
- Re-usable/abstract classes for XACML comparison/conversion/higher-order/set/bag functions
### Fixed
- Javadoc of DecisionResult#getExtendedIndeterminate() method
## 3.7.0
### Changed
- PDP extensions that are static root policy providers should now implement StaticRootPolicyProviderModule class, instead of RootPolicyProviderModule.Static class
- PDP extensions that are static ref-policy providers should now implement StaticRefPolicyProvider class, instead of RefPolicyProvider class with isStatic() method returning true
- (Static)RootPolicyProviderModule and (Static)RefPolicyProviderModule#get(...) return type is now (Static)TopLevelPolicyElementEvaluator instead of IPolicyEvaluator interface (removed)
### Added
- Interface method PolicyEvaluator#getExtraPolicyMetadata(): provides version of the evaluated Policy(Set) and policies referenced (directly/indirectly) from this Policy(Set)
- Interface method PolicyEvaluator#getPolicyElementType(): provides the type of top-level policy element (Policy or PolicySet).
- Interface method DecisionResult#getExtendedIndeterminate(): provides Extended Indeterminate value (to be used when #getDecision() returns "Indeterminate")
## 3.6.1
### Added
- Initial release on Github
## Contributing
### Contribution Rules
1. No SNAPSHOT dependencies on "develop" and obviously "master" branches
### Releasing
1. From the develop branch, prepare a release (example using a HTTP proxy):
$ mvn -Dhttps.proxyHost=proxyhostname -Dhttps.proxyPort=80 jgitflow:release-start
1. Update the CHANGELOG according to
1. To perform the release (example using a HTTP proxy):
$ mvn -Dhttps.proxyHost=proxyhostname -Dhttps.proxyPort=80 jgitflow:release-finish
If, after deployment, the command does not succeed because of some issue with the branches. Fix the issue, then re-run the same command but with 'noDeploy' option set to true to avoid re-deployment:
$ mvn -Dhttps.proxyHost=proxyhostname -Dhttps.proxyPort=80 -DnoDeploy=true jgitflow:release-finish
If the command fails because of a gpg error such as "no gpg-agent available to this session" or "no pinentry", make sure you have installed a pinentry program (e.g. with package `pinentry-gnome3`), and that a gpg-agent is running with this pinentry program, for example:
$ gpg-agent --daemon --pinentry-program /usr/bin/pinentry-gnome3
Then re-run the mvn command as above.
1. Connect and log in to the OSS Nexus Repository Manager:
1. Go to Staging Profiles and select the pending repository authzforce-*... you just uploaded with `jgitflow:release-finish`
1. Click the Release button to release to Maven Central.
More info on jgitflow:
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This project provides [JSON schemas](src/main/resources/org/ow2/authzforce/xacml/json/model) for validating XACML Request/Response according to JSON Profile of XACMl 3.0, as well as a [library](src/main/java/org/ow2/authzforce/xacml/json/model/ for validating XACML Requests/Responses against:
1. [Those JSON schemas](src/main/resources/org/ow2/authzforce/xacml/json/model);
2. Security constraints in order to mitigate JSON parsing Denial-of-Service attacks, e.g. such as string size, array size, number of keys, depth (see [LimitsCheckingJSONObject class](src/main/java/org/ow2/authzforce/xacml/json/model/
Check the [test classes](src/test/java) to find out usage examples.
# XSD-to-JSON-schema generation
[JSON schemas](src/main/resources/org/ow2/authzforce/xacml/json/model) were bootstrapped with XACML-schema-to-JSON generation tool `xsd2json2`. Then significant refactoring and adaptation to draft 6 of JSON schema has been done.
## Howto
WARNING: xsd2json2 supports only draft 4 but it is close to draft 6.
Before using xsd2json, first install SWI-Prolog package that is required to avoid issue:
$ sudo apt install swi-prolog
$ npm install -g xsd2json2
$ xsd2json2 -v ~/git/authzforce-ce-parent.git/xacml-model/src/main/resources/xacml-core-v3-schema-wd-17.xsd > xacml-core-v3-schema-wd-17.jsonschema
For info, you can generate first draft of JSON schema from request.json on but it only supports draf 04 and this is not really useful because you would need to spend time to make a Request covering all possibilities to build a good schema. (Is that even possible?)
### JSONix schema compiler
Not a good idea actually, because this changes many things compared to original XML and tries to keep distinction between XML attributes and elements and refers to JSONix custom non-standard types for each XML type, which is not what we want,
$ sudo npm install -g jsonix-schema-compiler
$ java -jar /usr/local/lib/node_modules/jsonix-schema-compiler/lib/jsonix-schema-compiler-full.jar -generateJsonSchema ~/git/authzforce-ce-parent.git/xacml-model/src/main/resources/xacml-core-v3-schema-wd-17.xsd
This generates .js and oasis_names_....jsonschema files.
## JSON schema limitations
- No support for (object-oriented) inheritance/polymorphism:
- Other issues considered for draft 7 (current version is draft 6):
- Much fewer built-in types, e.g. no date type:
\ No newline at end of file
<project xmlns="" xmlns:xsi="" xsi:schemaLocation="">
<description>AuthzForce - Data model for JSON Profile of XACML 3.0</description>
<!-- Publicly browsable repository URL. For example, via Gitlab web UI. -->
<!-- For org.everit.json.schema -->
<!-- Needed for org.springframework.util.ResourceUtils,SystemPropertyUtils,FileCopyUtils, etc. -->
package org.ow2.authzforce.xacml.json.model;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
* {@link JSONObject} that complies with limits in terms of value length, depth and number of elements.
public final class LimitsCheckingJSONObject extends JSONObject
* Hardened {@link JSONTokener} that checks limits on JSON structures, such as arrays and strings, in order to mitigate content-level attacks. Downside: it is slower at parsing than
* {@link JSONTokener}.
private static final class LimitsCheckingJSONTokener extends JSONTokener
private final int maxJsonStringLength;
private final int maxNumOfKeysOrArrayItems;
private final int maxDepth;
private transient boolean nextStringInProgress = false;
* Position of last read character from a JSON string (being parsed)
private transient int lastReadCharPosFromNextString = -1;
private transient int currentValueDepth = 0;
* Constructs from a {@link Reader}
* @param reader
* a reader
* @param maxJsonStringLength
* allowed maximum size of JSON keys and string values
* @param maxNumOfImmediateChildren
* allowed maximum number of keys (therefore key-value pairs) in JSON object, or items in JSON array
* @param maxDepth
* allowed maximum depth of JSON object
private LimitsCheckingJSONTokener(final Reader reader, final int maxJsonStringLength, final int maxNumOfImmediateChildren, final int maxDepth)
this.maxJsonStringLength = maxJsonStringLength;
this.maxNumOfKeysOrArrayItems = maxNumOfImmediateChildren;
this.maxDepth = maxDepth;
* Constructs from an {@link InputStream}
* @param inputStream
* the source
* @param maxJsonStringLength
* allowed maximum length of JSON keys and string values
* @param maxNumOfImmediateChildren
* allowed maximum number of keys (therefore key-value pairs) in JSON object, or items in JSON array
* @param maxDepth
* allowed maximum depth of JSON object
private LimitsCheckingJSONTokener(final InputStream inputStream, final int maxJsonStringLength, final int maxNumOfImmediateChildren, final int maxDepth)
this(new InputStreamReader(inputStream), maxJsonStringLength, maxNumOfImmediateChildren, maxDepth);
* (non-Javadoc)
* @see org.json.JSONTokener#next()
public char next() throws JSONException