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Adapted RestLayerPrivilegesEvaluator
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Signed-off-by: Nils Bandener <nils.bandener@eliatra.com>
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@nibix
nibix committed Jul 12, 2024
1 parent 0500d12 commit 30fcc0f
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Showing 10 changed files with 186 additions and 180 deletions.
3 changes: 1 addition & 2 deletions src/main/java/org/opensearch/security/OpenSearchSecurityPlugin.java
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Expand Up @@ -1142,7 +1142,7 @@ public Collection<Object> createComponents(
principalExtractor = ReflectionHelper.instantiatePrincipalExtractor(principalExtractorClass);
}

restLayerEvaluator = new RestLayerPrivilegesEvaluator(clusterService, threadPool);
restLayerEvaluator = new RestLayerPrivilegesEvaluator(evaluator);

securityRestHandler = new SecurityRestFilter(
backendRegistry,
Expand All @@ -1161,7 +1161,6 @@ public Collection<Object> createComponents(
dcf.registerDCFListener(xffResolver);
dcf.registerDCFListener(evaluator);
dcf.registerDCFListener(restLayerEvaluator);
dcf.registerDCFListener(securityRestHandler);
dcf.registerDCFListener(tokenManager);
if (!(auditLog instanceof NullAuditLog)) {
// Don't register if advanced modules is disabled in which case auditlog is instance of NullAuditLog
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19 changes: 8 additions & 11 deletions src/main/java/org/opensearch/security/filter/SecurityRestFilter.java
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Expand Up @@ -27,12 +27,14 @@
package org.opensearch.security.filter;

import java.nio.file.Path;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.regex.Pattern;
import javax.net.ssl.SSLPeerUnverifiedException;

import com.google.common.collect.ImmutableSet;
import org.apache.http.HttpStatus;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
Expand Down Expand Up @@ -225,17 +227,12 @@ void authorizeRequest(RestHandler original, SecurityRequestChannel request, User
if (routeSupportsRestAuthorization) {
PrivilegesEvaluatorResponse pres = new PrivilegesEvaluatorResponse();
NamedRoute route = ((NamedRoute) handler.get());
// if actionNames are present evaluate those first
Set<String> actionNames = route.actionNames();
if (actionNames != null && !actionNames.isEmpty()) {
pres = evaluator.evaluate(user, actionNames);
}

// now if pres.allowed is still false check for the NamedRoute name as a permission
if (!pres.isAllowed()) {
String action = route.name();
pres = evaluator.evaluate(user, Set.of(action));
}
// Check both route.actionNames() and route.name(). The presence of either is sufficient.
Set<String> actionNames = ImmutableSet.<String>builder()
.addAll(route.actionNames() != null ? route.actionNames() : Collections.emptySet())
.add(route.name())
.build();
pres = evaluator.evaluate(user, route.name(), actionNames);

if (log.isDebugEnabled()) {
log.debug(pres.toString());
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44 changes: 44 additions & 0 deletions src/main/java/org/opensearch/security/privileges/ActionPrivileges.java
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Expand Up @@ -111,6 +111,10 @@ public PrivilegesEvaluatorResponse hasClusterPrivilege(PrivilegesEvaluationConte
return cluster.providesPrivilege(context, action, context.getMappedRoles());
}

public PrivilegesEvaluatorResponse hasAnyClusterPrivilege(PrivilegesEvaluationContext context, Set<String> actions) {
return cluster.providesAnyPrivilege(context, actions, context.getMappedRoles());
}

public PrivilegesEvaluatorResponse hasIndexPrivilege(
PrivilegesEvaluationContext context,
Set<String> actions,
Expand Down Expand Up @@ -311,6 +315,46 @@ PrivilegesEvaluatorResponse providesPrivilege(PrivilegesEvaluationContext contex

return PrivilegesEvaluatorResponse.insufficient(action, context);
}

/**
* Checks whether this instance provides privileges for the combination of any of the provided actions and the
* provided roles. Returns a PrivilegesEvaluatorResponse with allowed=true if privileges are available.
* Otherwise, allowed will be false and missingPrivileges will contain the name of the given action.
*/
PrivilegesEvaluatorResponse providesAnyPrivilege(PrivilegesEvaluationContext context, Set<String> actions, Set<String> roles) {
// 1: Check roles with wildcards
if (CollectionUtils.containsAny(roles, this.rolesWithWildcardPermissions)) {
return PrivilegesEvaluatorResponse.ok();
}

// 2: Check well-known actions - this should cover most cases
for (String action : actions) {
ImmutableSet<String> rolesWithPrivileges = this.actionToRoles.get(action);

if (rolesWithPrivileges != null && CollectionUtils.containsAny(roles, rolesWithPrivileges)) {
return PrivilegesEvaluatorResponse.ok();
}
}

// 3: Only if everything else fails: Check the matchers in case we have a non-well-known action
for (String action : actions) {
if (!this.wellKnownClusterActions.contains(action)) {
for (String role : roles) {
WildcardMatcher matcher = this.rolesToActionMatcher.get(role);

if (matcher != null && matcher.test(action)) {
return PrivilegesEvaluatorResponse.ok();
}
}
}
}

if (actions.size() == 1) {
return PrivilegesEvaluatorResponse.insufficient(actions.iterator().next(), context);
} else {
return PrivilegesEvaluatorResponse.insufficient("any of " + actions, context);
}
}
}

/**
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2 changes: 1 addition & 1 deletion src/main/java/org/opensearch/security/privileges/PrivilegesEvaluationContext.java
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Expand Up @@ -51,7 +51,7 @@ public class PrivilegesEvaluationContext {
*/
private final Map<String, WildcardMatcher> renderedPatternTemplateCache = new HashMap<>();

public PrivilegesEvaluationContext(
PrivilegesEvaluationContext(
User user,
ImmutableSet<String> mappedRoles,
String action,
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42 changes: 27 additions & 15 deletions src/main/java/org/opensearch/security/privileges/PrivilegesEvaluator.java
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Expand Up @@ -188,18 +188,22 @@ public PrivilegesEvaluator(
pitPrivilegesEvaluator = new PitPrivilegesEvaluator();
this.namedXContentRegistry = namedXContentRegistry;

configurationRepository.subscribeOnChange(configMap -> {
try {
// TODO: It is not nice that we cannot use a concrete generic parameter for SecurityDynamicConfiguration
// TODO: At the moment, the implementations only support the V7 config objects
SecurityDynamicConfiguration<?> actionGroupsConfiguration = configurationRepository.getConfiguration(CType.ACTIONGROUPS);
SecurityDynamicConfiguration<?> rolesConfiguration = configurationRepository.getConfiguration(CType.ROLES);

this.updateConfiguration(actionGroupsConfiguration, rolesConfiguration);
} catch (Exception e) {
log.error("Error while updating ActionPrivileges object with {}", configMap, e);
}
});
if (configurationRepository != null) {
configurationRepository.subscribeOnChange(configMap -> {
try {
// TODO: It is not nice that we cannot use a concrete generic parameter for SecurityDynamicConfiguration
// TODO: At the moment, the implementations only support the V7 config objects
SecurityDynamicConfiguration<?> actionGroupsConfiguration = configurationRepository.getConfiguration(
CType.ACTIONGROUPS
);
SecurityDynamicConfiguration<?> rolesConfiguration = configurationRepository.getConfiguration(CType.ROLES);

this.updateConfiguration(actionGroupsConfiguration, rolesConfiguration);
} catch (Exception e) {
log.error("Error while updating ActionPrivileges object with {}", configMap, e);
}
});
}

if (clusterService != null) {
clusterService.addListener(new ClusterStateListener() {
Expand All @@ -226,11 +230,11 @@ void updateConfiguration(
if (rolesConfiguration != null) {
@SuppressWarnings("unchecked")
SecurityDynamicConfiguration<ActionGroupsV7> actionGroupsWithStatics = actionGroupsConfiguration != null
? (SecurityDynamicConfiguration<ActionGroupsV7>) DynamicConfigFactory.addStatics(actionGroupsConfiguration.deepClone())
? (SecurityDynamicConfiguration<ActionGroupsV7>) DynamicConfigFactory.addStatics(actionGroupsConfiguration.clone())
: (SecurityDynamicConfiguration<ActionGroupsV7>) DynamicConfigFactory.addStatics(SecurityDynamicConfiguration.empty());
FlattenedActionGroups flattenedActionGroups = new FlattenedActionGroups(actionGroupsWithStatics);
ActionPrivileges actionPrivileges = new ActionPrivileges(
DynamicConfigFactory.addStatics(rolesConfiguration.deepClone()),
DynamicConfigFactory.addStatics(rolesConfiguration.clone()),
flattenedActionGroups,
() -> clusterStateSupplier.get().metadata().getIndicesLookup()
);
Expand All @@ -249,6 +253,10 @@ public void onDynamicConfigModelChanged(DynamicConfigModel dcm) {
this.dcm = dcm;
}

ActionPrivileges getActionPrivileges() {
return this.actionPrivileges;
}

public SecurityRoles getSecurityRoles(Set<String> roles) {
return configModel.getSecurityRoles().filter(roles);
}
Expand All @@ -264,7 +272,7 @@ private boolean hasRestAdminPermissions(final Set<String> roles, String permissi
}

public boolean isInitialized() {
return configModel != null && configModel.getSecurityRoles() != null && dcm != null;
return configModel != null && dcm != null && actionPrivileges != null;
}

private void setUserInfoInThreadContext(User user) {
Expand All @@ -281,6 +289,10 @@ private void setUserInfoInThreadContext(User user) {
}
}

public PrivilegesEvaluationContext createContext(User user, String action) {
return createContext(user, action, null, null, null);
}

public PrivilegesEvaluationContext createContext(
User user,
String action0,
Expand Down
83 changes: 18 additions & 65 deletions src/main/java/org/opensearch/security/privileges/RestLayerPrivilegesEvaluator.java
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Expand Up @@ -16,85 +16,38 @@
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import org.opensearch.OpenSearchSecurityException;
import org.opensearch.cluster.service.ClusterService;
import org.opensearch.common.util.concurrent.ThreadContext;
import org.opensearch.core.common.transport.TransportAddress;
import org.opensearch.security.securityconf.ConfigModel;
import org.opensearch.security.securityconf.SecurityRoles;
import org.opensearch.security.support.ConfigConstants;
import org.opensearch.security.user.User;
import org.opensearch.threadpool.ThreadPool;

import org.greenrobot.eventbus.Subscribe;

public class RestLayerPrivilegesEvaluator {
protected final Logger log = LogManager.getLogger(this.getClass());
private final ClusterService clusterService;
private ThreadContext threadContext;
private ConfigModel configModel;

public RestLayerPrivilegesEvaluator(final ClusterService clusterService, final ThreadPool threadPool) {
this.clusterService = clusterService;
this.threadContext = threadPool.getThreadContext();
}

@Subscribe
public void onConfigModelChanged(final ConfigModel configModel) {
this.configModel = configModel;
}

SecurityRoles getSecurityRoles(final Set<String> roles) {
return configModel.getSecurityRoles().filter(roles);
}
private final PrivilegesEvaluator privilegesEvaluator;

boolean isInitialized() {
return configModel != null && configModel.getSecurityRoles() != null;
public RestLayerPrivilegesEvaluator(PrivilegesEvaluator privilegesEvaluator) {
this.privilegesEvaluator = privilegesEvaluator;
}

public PrivilegesEvaluatorResponse evaluate(final User user, final Set<String> actions) {
if (!isInitialized()) {
throw new OpenSearchSecurityException("OpenSearch Security is not initialized.");
}

final TransportAddress caller = threadContext.getTransient(ConfigConstants.OPENDISTRO_SECURITY_REMOTE_ADDRESS);

final Set<String> mappedRoles = mapRoles(user, caller);

final SecurityRoles securityRoles = getSecurityRoles(mappedRoles);
public PrivilegesEvaluatorResponse evaluate(final User user, final String routeName, final Set<String> actions) {
PrivilegesEvaluationContext context = privilegesEvaluator.createContext(user, routeName);

final boolean isDebugEnabled = log.isDebugEnabled();
if (isDebugEnabled) {
log.debug("Evaluate permissions for {} on {}", user, clusterService.localNode().getName());
log.debug("Evaluate permissions for {}", user);
log.debug("Action: {}", actions);
log.debug("Mapped roles: {}", mappedRoles.toString());
log.debug("Mapped roles: {}", context.getMappedRoles().toString());
}

for (final String action : actions) {
if (!securityRoles.impliesClusterPermissionPermission(action)) {
// TODO This will exhibit a weird behaviour when a REST action specifies two permissions, and
// if the user has no permissions for the first one, but has permissions for the second one:
// First, the information "No permission match" will be logged, but then the action will be
// allowed nevertheless.
log.info(
"No permission match for {} [Action [{}]] [RolesChecked {}]. No permissions for {}",
user,
action,
securityRoles.getRoleNames(),
action
);
} else {
if (isDebugEnabled) {
log.debug("Allowed because we have permissions for {}", actions);
}
return PrivilegesEvaluatorResponse.ok();
}
}
PrivilegesEvaluatorResponse result = privilegesEvaluator.getActionPrivileges().hasAnyClusterPrivilege(context, actions);

return PrivilegesEvaluatorResponse.insufficient(actions).resolvedSecurityRoles(mappedRoles);
}
if (!result.allowed) {
log.info(
"No permission match for {} [Action [{}]] [RolesChecked {}]. No permissions for {}",
user,
routeName,
context.getMappedRoles(),
result.getMissingPrivileges()
);
}

Set<String> mapRoles(final User user, final TransportAddress caller) {
return this.configModel.mapSecurityRoles(user, caller);
return result;
}
}
13 changes: 13 additions & 0 deletions src/main/java/org/opensearch/security/securityconf/impl/SecurityDynamicConfiguration.java
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Original file line number Diff line number Diff line change
Expand Up @@ -169,6 +169,7 @@ public static <T> SecurityDynamicConfiguration<T> fromYaml(String yaml, CType ct
DefaultObjectMapper.getTypeFactory().constructParametricType(SecurityDynamicConfiguration.class, implementationClass)
);
result.ctype = ctype;
result.version = 2;
return result;
}

Expand Down Expand Up @@ -327,6 +328,18 @@ public Class<?> getImplementingClass() {
return getCType() == null ? null : getCType().getImplementationClass().get(getVersion());
}

@JsonIgnore
public SecurityDynamicConfiguration<T> clone() {
SecurityDynamicConfiguration<T> result = new SecurityDynamicConfiguration<T>();
result.version = this.version;
result.ctype = this.ctype;
result.primaryTerm = this.primaryTerm;
result.seqNo = this.seqNo;
result._meta = this._meta;
result.centries.putAll(this.centries);
return result;
}

@JsonIgnore
public SecurityDynamicConfiguration<T> deepClone() {
try {
Expand Down
4 changes: 2 additions & 2 deletions src/test/java/org/opensearch/security/privileges/ActionPrivilegesTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -571,8 +571,8 @@ static PrivilegesEvaluationContext ctx(String... roles) {
null,
null,
null,
new IndexNameExpressionResolver(new ThreadContext(Settings.EMPTY)),
null
new IndexNameExpressionResolver(new ThreadContext(Settings.EMPTY)),
null
);
}
}
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