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Extension for CDI integration to support injection of Claims and JsonWebToken
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/*
* Copyright (c) 2018, 2019 Oracle and/or its affiliates. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.helidon.microprofile.jwt.auth.cdi;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import java.lang.reflect.Constructor;
import java.lang.reflect.Member;
import java.lang.reflect.Method;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import javax.enterprise.event.Observes;
import javax.enterprise.inject.Instance;
import javax.enterprise.inject.spi.AfterBeanDiscovery;
import javax.enterprise.inject.spi.AfterDeploymentValidation;
import javax.enterprise.inject.spi.Annotated;
import javax.enterprise.inject.spi.AnnotatedField;
import javax.enterprise.inject.spi.AnnotatedParameter;
import javax.enterprise.inject.spi.BeanManager;
import javax.enterprise.inject.spi.BeforeBeanDiscovery;
import javax.enterprise.inject.spi.DeploymentException;
import javax.enterprise.inject.spi.Extension;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.enterprise.inject.spi.ProcessInjectionPoint;
import javax.enterprise.util.AnnotationLiteral;
import javax.enterprise.util.Nonbinding;
import javax.inject.Provider;
import javax.inject.Qualifier;
import javax.json.JsonArray;
import javax.json.JsonNumber;
import javax.json.JsonObject;
import javax.json.JsonString;
import javax.json.JsonValue;
import org.eclipse.microprofile.jwt.Claim;
import org.eclipse.microprofile.jwt.ClaimValue;
import org.eclipse.microprofile.jwt.Claims;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.PARAMETER;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* JWT Authentication CDI extension class.
*/
public class JwtAuthCdiExtension implements Extension {
private final List qualifiers = new LinkedList<>();
/**
* Initializes the extension prior to bean discovery.
*
* @param discovery bean discovery event
*/
public void before(@Observes BeforeBeanDiscovery discovery) {
// Register beans manually
discovery.addAnnotatedType(JsonWebTokenProducer.class, "TokenProducer");
}
/**
* Process each injection point for {@link Claim}.
*
* @param pip event from CDI container
*/
public void collectClaimProducer(@Observes ProcessInjectionPoint pip) {
Claim claim = pip.getInjectionPoint().getAnnotated().getAnnotation(Claim.class);
if (claim != null) {
if ((claim.standard() != Claims.UNKNOWN) && !claim.value().isEmpty()) {
throw new DeploymentException("Claim annotation should not have both values at value and standard! "
+ "@Claim(value=" + claim.value()
+ ", standard=Claims." + claim.standard().name() + ")");
}
InjectionPoint ip = pip.getInjectionPoint();
Type type = ip.getType();
FieldTypes ft = FieldTypes.forType(type);
ClaimLiteral q = new ClaimLiteral(
(claim.standard() == Claims.UNKNOWN)
? claim.value()
: claim.standard().name(),
ip.getMember().getDeclaringClass().getName() + "." + getFieldName(ip),
ft.isOptional(),
ft.isClaimValue(),
ft.getField0().getRawType(),
ft.getField1().getRawType(),
ft.getField2().getRawType(),
ft.getField3().getRawType(),
type.toString());
pip.configureInjectionPoint()
.addQualifier(q);
qualifiers.add(new ClaimIP(q, type));
}
}
/**
* Register a claim producer bean for each {@link Claim} injection.
*
* @param abd event from CDI container
* @param bm bean manager
*/
public void registerClaimProducers(@Observes AfterBeanDiscovery abd, BeanManager bm) {
// each injection point will have its own bean
qualifiers.forEach(q -> abd.addBean(new ClaimProducer(q.qualifier, q.type, bm)));
}
/**
* Validate all injection points are valid.
*
* @param add event from CDI container
*/
public void validate(@Observes AfterDeploymentValidation add) {
qualifiers.forEach(q -> {
ClaimLiteral claimLiteral = q.getQualifier();
validate(claimLiteral);
});
}
@SuppressWarnings("Duplicates")
private String getFieldName(InjectionPoint ip) {
Annotated annotated = ip.getAnnotated();
if (annotated instanceof AnnotatedField) {
AnnotatedField f = (AnnotatedField) annotated;
return f.getJavaMember().getName();
}
if (annotated instanceof AnnotatedParameter) {
AnnotatedParameter p = (AnnotatedParameter) annotated;
Member member = ip.getMember();
if (member instanceof Method) {
return member.getName() + "_" + p.getPosition();
}
if (member instanceof Constructor) {
return "new_" + p.getPosition();
}
}
return ip.getMember().getName();
}
private void validate(ClaimLiteral claimLiteral) {
Class rawType = claimLiteral.rawType();
if (ClaimValue.class.equals(rawType)) {
validateClaimValue(claimLiteral, claimLiteral.typeArg(), claimLiteral.typeArg2(), claimLiteral.typeArg3());
} else if (Optional.class.equals(rawType)) {
validateOptional(claimLiteral, claimLiteral.typeArg(), claimLiteral.typeArg2());
} else if ((Set.class.equals(rawType)) || (JsonArray.class.equals(rawType))) {
validateSet(claimLiteral, rawType, claimLiteral.typeArg());
} else {
validateBaseType(claimLiteral, rawType);
}
}
private void validateClaimValue(ClaimLiteral claimLiteral, Class parameter, Class parameter2, Class parameter3) {
if (ClaimValue.class.equals(parameter)) {
throw new DeploymentException(
"ClaimValue has to be used as top level wrapper type. It cannot be parameter as it is in "
+ "the field " + claimLiteral.id + " of type " + claimLiteral.fieldTypeString);
} else if (Optional.class.equals(parameter)) {
validateOptional(claimLiteral, parameter2, parameter3);
} else if ((Set.class.equals(parameter)) || (JsonArray.class.equals(parameter))) {
validateSet(claimLiteral, parameter, parameter2);
} else {
validateBaseType(claimLiteral, parameter);
}
}
private void validateOptional(ClaimLiteral claimLiteral, Class parameter, Class parameter2) {
if (ClaimValue.class.equals(parameter)) {
throw new DeploymentException(
"ClaimValue has to be used as top level wrapper type. It cannot be parameter of Optional as it is in "
+ "the field " + claimLiteral.id + " of type " + claimLiteral.fieldTypeString);
} else if (Optional.class.equals(parameter)) {
throw new DeploymentException(
"Optional has to be used as top/second level wrapper type. It cannot be parameter of another Optional as it"
+ " is in the field " + claimLiteral.id + " of type " + claimLiteral.fieldTypeString);
} else if ((Set.class.equals(parameter)) || (JsonArray.class.equals(parameter))) {
validateSet(claimLiteral, parameter, parameter2);
} else {
validateBaseType(claimLiteral, parameter);
}
}
private void validateSet(ClaimLiteral claimLiteral, Class parent, Class parameter) {
if (!String.class.equals(parameter) && !NoType.class.equals(parameter)) {
throw new DeploymentException("Set<" + parameter
.getName() + "> is not supported type. Field has to have a Set with a String parameter.");
}
try {
Claims claims = Claims.valueOf(claimLiteral.name);
if (!Set.class.isAssignableFrom(claims.getType())
&& !JsonArray.class.isAssignableFrom(claims.getType())) {
throw new DeploymentException("Cannot assign value of claim " + claimLiteral.name
+ " (claim type: " + claims.getType().getName() + ") "
+ " to the field " + claimLiteral.id + " of type "
+ claimLiteral.fieldTypeString);
}
} catch (IllegalArgumentException ignored) {
//if claim is custom, it has to be JsonArray in case of Set
if (!JsonArray.class.equals(parent)) {
throw new DeploymentException(
"Field type has to be JsonArray (instead of Set) while using custom claim name. "
+ "Field " + claimLiteral.id + " can not be type: " + claimLiteral.fieldTypeString);
}
}
}
private void validateBaseType(ClaimLiteral claimLiteral, Class clazz) {
if (NoType.class.equals(clazz)) {
return;
}
try {
Claims claims = Claims.valueOf(claimLiteral.name);
//check if field type and claim type are compatible
if ((clazz.equals(Long.class) || clazz.equals(long.class) || JsonNumber.class.isAssignableFrom(clazz))
&& (Long.class.equals(claims.getType()) || JsonNumber.class.isAssignableFrom(claims.getType()))) {
return;
}
if ((clazz.equals(String.class) || JsonString.class.isAssignableFrom(clazz))
&& (String.class.equals(claims.getType()) || JsonString.class.isAssignableFrom(claims.getType()))) {
return;
}
if ((clazz.equals(Boolean.class) || clazz.equals(boolean.class) || JsonValue.class.isAssignableFrom(clazz))
&& (Boolean.class.equals(claims.getType()) || JsonValue.class.isAssignableFrom(claims.getType()))) {
return;
}
if ((clazz.equals(JsonObject.class) && JsonObject.class.isAssignableFrom(claims.getType()))) {
return;
}
if ((clazz.equals(JsonArray.class) && Set.class.isAssignableFrom(claims.getType()))) {
return;
}
throw new DeploymentException("Cannot assign value of claim " + claimLiteral.name
+ " (claim type: " + claims.getType().getName() + ") "
+ " to the field " + claimLiteral.id
+ " of type " + claimLiteral.fieldTypeString);
} catch (IllegalArgumentException ignored) {
//If claim requested claim is the custom claim, its unwrapped field type has to be JsonValue or its subtype
if (!JsonValue.class.isAssignableFrom(clazz)) {
throw new DeploymentException("Field type has to be JsonValue or its subtype while using custom claim name. "
+ "Field " + claimLiteral.id + " can not be type: "
+ claimLiteral.fieldTypeString);
}
}
}
@Qualifier
@Retention(RUNTIME)
@Target({METHOD, FIELD, PARAMETER, TYPE})
@interface MpClaimQualifier {
@Nonbinding
String name();
String id();
@Nonbinding
boolean optional();
@Nonbinding
boolean claimValue();
@Nonbinding
Class rawType();
@Nonbinding
Class typeArg();
@Nonbinding
Class typeArg2();
@Nonbinding
Class typeArg3();
}
static class ClaimLiteral extends AnnotationLiteral implements MpClaimQualifier {
private final String name;
private final String id;
private final boolean optional;
private final boolean claimValue;
private final Class rawType;
private final Class typeArg;
private final Class typeArg2;
private final Class typeArg3;
private final String fieldTypeString;
ClaimLiteral(String name,
String id,
boolean optional,
boolean claimValue,
Class rawType,
Class typeArg,
Class typeArg2,
Class typeArg3,
String fieldTypeString) {
this.name = name;
this.id = id;
this.optional = optional;
this.claimValue = claimValue;
this.rawType = rawType;
this.typeArg = typeArg;
this.typeArg2 = typeArg2;
this.typeArg3 = typeArg3;
this.fieldTypeString = fieldTypeString;
}
@Override
public String name() {
return name;
}
@Override
public String id() {
return id;
}
@Override
public boolean optional() {
return optional;
}
@Override
public boolean claimValue() {
return claimValue;
}
@Override
public Class rawType() {
return rawType;
}
@Override
public Class typeArg() {
return typeArg;
}
@Override
public Class typeArg2() {
return typeArg2;
}
@Override
public Class typeArg3() {
return typeArg3;
}
@Override
public String toString() {
return "ClaimLiteral{"
+ "rawType=" + rawType
+ ", name=" + name
+ ", id=" + id
+ '}';
}
}
static class ClaimIP {
private final ClaimLiteral qualifier;
private final Type type;
ClaimIP(ClaimLiteral qualifier, Type type) {
this.qualifier = qualifier;
this.type = type;
}
public ClaimLiteral getQualifier() {
return qualifier;
}
public Type getType() {
return type;
}
}
static class FieldTypes {
private boolean optional = false;
private boolean claimValue = false;
private TypedField field0;
private TypedField field1;
private TypedField field2;
private TypedField field3;
static FieldTypes forType(Type type) {
FieldTypes ft = new FieldTypes();
// if the first type is a Instace.class, we do not want it and start from its child
//Fields can have 3 parametes in total -> ClaimValue>>. That is why we need 4 fields in total.
TypedField firstType = getTypedField(type);
if (firstType.rawType.equals(Instance.class) || firstType.rawType.equals(Provider.class)) {
ft.field0 = getTypedField(firstType);
} else {
ft.field0 = firstType;
}
ft.field1 = getTypedField(ft.field0);
ft.field2 = getTypedField(ft.field1);
ft.field3 = getTypedField(ft.field2);
//check for claim value and optional wrappers
if (ft.field0.getRawType().equals(ClaimValue.class)) {
ft.claimValue = true;
}
if (ft.field0.getRawType().equals(Optional.class) || ft.field1.getRawType().equals(Optional.class)) {
ft.optional = true;
}
return ft;
}
static TypedField getTypedField(Type type) {
if (type instanceof Class) {
return new TypedField((Class) type);
}
if (type instanceof ParameterizedType) {
ParameterizedType paramType = (ParameterizedType) type;
return new TypedField((Class) paramType.getRawType(), paramType);
}
throw new UnsupportedOperationException("No idea how to handle " + type);
}
private static TypedField getTypedField(TypedField field) {
if (field.isParameterized()) {
ParameterizedType paramType = field.paramType;
Type[] typeArgs = paramType.getActualTypeArguments();
if (typeArgs.length == 1) {
Type typeArg = typeArgs[0];
return getTypedField(typeArg);
}
if ((typeArgs.length == 2) && (field.rawType.equals(Map.class))) {
if ((typeArgs[0].equals(typeArgs[1])) && (typeArgs[0].equals(String.class))) {
return new TypedField(String.class);
}
}
throw new DeploymentException("Cannot create config property for " + field.rawType + ", params: " + Arrays
.toString(typeArgs));
}
return new TypedField(NoType.class);
}
TypedField getField0() {
return field0;
}
TypedField getField1() {
return field1;
}
TypedField getField2() {
return field2;
}
TypedField getField3() {
return field3;
}
public boolean isOptional() {
return optional;
}
public boolean isClaimValue() {
return claimValue;
}
static final class TypedField {
private final Class rawType;
private ParameterizedType paramType;
private TypedField(Class rawType) {
this.rawType = rawType;
}
private TypedField(Class rawType, ParameterizedType paramType) {
this.rawType = rawType;
this.paramType = paramType;
}
boolean isParameterized() {
return paramType != null;
}
Class getRawType() {
return rawType;
}
ParameterizedType getParamType() {
return paramType;
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if ((o == null) || (!getClass().equals(o.getClass()))) {
return false;
}
TypedField that = (TypedField) o;
return Objects.equals(rawType, that.rawType)
&& Objects.equals(paramType, that.paramType);
}
@Override
public int hashCode() {
return Objects.hash(rawType, paramType);
}
@Override
public String toString() {
return "TypedField{"
+ "rawType=" + rawType
+ ", paramType=" + paramType
+ '}';
}
}
}
private static final class NoType {
private NoType() {
}
}
}