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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.model.container.http;
import com.yahoo.component.ComponentId;
import com.yahoo.component.ComponentSpecification;
import com.yahoo.vespa.model.container.ApplicationContainerCluster;
import com.yahoo.vespa.model.container.ContainerCluster;
import com.yahoo.vespa.model.container.component.BindingPattern;
import com.yahoo.vespa.model.container.component.FileStatusHandlerComponent;
import com.yahoo.vespa.model.container.component.Handler;
import com.yahoo.vespa.model.container.component.SystemBindingPattern;
import com.yahoo.vespa.model.container.component.chain.Chain;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
/**
* Helper class for http access control.
*
* @author gjoranv
* @author bjorncs
*/
public class AccessControl {
public static final ComponentId ACCESS_CONTROL_CHAIN_ID = ComponentId.fromString("access-control-chain");
public static final ComponentId ACCESS_CONTROL_EXCLUDED_CHAIN_ID = ComponentId.fromString("access-control-excluded-chain");
private static final int HOSTED_CONTAINER_PORT = 4443;
// Handlers that are excluded from access control
private static final List<String> EXCLUDED_HANDLERS = List.of(
FileStatusHandlerComponent.CLASS,
ContainerCluster.APPLICATION_STATUS_HANDLER_CLASS,
ContainerCluster.BINDINGS_OVERVIEW_HANDLER_CLASS,
ContainerCluster.STATE_HANDLER_CLASS,
ContainerCluster.LOG_HANDLER_CLASS,
ApplicationContainerCluster.METRICS_V2_HANDLER_CLASS,
ApplicationContainerCluster.PROMETHEUS_V1_HANDLER_CLASS
);
public static class Builder {
private final String domain;
private boolean readEnabled = false;
private boolean writeEnabled = true;
private final Set<BindingPattern> excludeBindings = new LinkedHashSet<>();
private Collection<Handler<?>> handlers = Collections.emptyList();
public Builder(String domain) {
this.domain = domain;
}
public Builder readEnabled(boolean readEnabled) {
this.readEnabled = readEnabled;
return this;
}
public Builder writeEnabled(boolean writeEnabled) {
this.writeEnabled = writeEnabled;
return this;
}
public Builder excludeBinding(BindingPattern binding) {
this.excludeBindings.add(binding);
return this;
}
public Builder setHandlers(ApplicationContainerCluster cluster) {
this.handlers = cluster.getHandlers();
return this;
}
public AccessControl build() {
return new AccessControl(domain, writeEnabled, readEnabled, excludeBindings, handlers);
}
}
public final String domain;
public final boolean readEnabled;
public final boolean writeEnabled;
private final Set<BindingPattern> excludedBindings;
private final Collection<Handler<?>> handlers;
private AccessControl(String domain,
boolean writeEnabled,
boolean readEnabled,
Set<BindingPattern> excludedBindings,
Collection<Handler<?>> handlers) {
this.domain = domain;
this.readEnabled = readEnabled;
this.writeEnabled = writeEnabled;
this.excludedBindings = Collections.unmodifiableSet(excludedBindings);
this.handlers = handlers;
}
public void configureHttpFilterChains(Http http) {
http.setAccessControl(this);
addAccessControlFilterChain(http);
addAccessControlExcludedChain(http);
removeDuplicateBindingsFromAccessControlChain(http);
}
public static boolean hasHandlerThatNeedsProtection(ApplicationContainerCluster cluster) {
return cluster.getHandlers().stream()
.anyMatch(handler -> ! isExcludedHandler(handler) && hasNonMbusBinding(handler));
}
private void addAccessControlFilterChain(Http http) {
http.getFilterChains().add(createChain(ACCESS_CONTROL_CHAIN_ID));
http.getBindings().addAll(List.of(createAccessControlBinding("/"), createAccessControlBinding("/*")));
}
private void addAccessControlExcludedChain(Http http) {
http.getFilterChains().add(createChain(ACCESS_CONTROL_EXCLUDED_CHAIN_ID));
for (BindingPattern excludedBinding : excludedBindings) {
http.getBindings().add(createAccessControlExcludedBinding(excludedBinding));
}
for (Handler<?> handler : handlers) {
if (isExcludedHandler(handler)) {
for (BindingPattern binding : handler.getServerBindings()) {
http.getBindings().add(createAccessControlExcludedBinding(binding));
}
}
}
}
// Remove bindings from access control chain that have binding pattern as a different filter chain
private void removeDuplicateBindingsFromAccessControlChain(Http http) {
Set<FilterBinding> duplicateBindings = new HashSet<>();
for (FilterBinding binding : http.getBindings()) {
if (binding.chainId().toId().equals(ACCESS_CONTROL_CHAIN_ID)) {
for (FilterBinding otherBinding : http.getBindings()) {
if (!binding.chainId().equals(otherBinding.chainId())
&& binding.binding().equals(otherBinding.binding())) {
duplicateBindings.add(binding);
}
}
}
}
duplicateBindings.forEach(http.getBindings()::remove);
}
private static FilterBinding createAccessControlBinding(String path) {
return FilterBinding.create(
new ComponentSpecification(ACCESS_CONTROL_CHAIN_ID.stringValue()),
SystemBindingPattern.fromHttpPortAndPath(Integer.toString(HOSTED_CONTAINER_PORT), path));
}
private static FilterBinding createAccessControlExcludedBinding(BindingPattern excludedBinding) {
BindingPattern rewrittenBinding = SystemBindingPattern.fromHttpPortAndPath(
Integer.toString(HOSTED_CONTAINER_PORT), excludedBinding.path()); // only keep path from excluded binding
return FilterBinding.create(
new ComponentSpecification(ACCESS_CONTROL_EXCLUDED_CHAIN_ID.stringValue()),
rewrittenBinding);
}
private static Chain<Filter> createChain(ComponentId id) { return new Chain<>(FilterChains.emptyChainSpec(id)); }
private static boolean isExcludedHandler(Handler<?> handler) { return EXCLUDED_HANDLERS.contains(handler.getClassId().getName()); }
private static boolean hasNonMbusBinding(Handler<?> handler) {
return handler.getServerBindings().stream().anyMatch(binding -> ! binding.scheme().equals("mbus"));
}
}
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