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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.security.tls.authz;
import com.yahoo.security.KeyAlgorithm;
import com.yahoo.security.KeyUtils;
import com.yahoo.security.X509CertificateBuilder;
import com.yahoo.security.tls.policy.AuthorizedPeers;
import com.yahoo.security.tls.policy.PeerPolicy;
import com.yahoo.security.tls.policy.RequiredPeerCredential;
import com.yahoo.security.tls.policy.RequiredPeerCredential.Field;
import com.yahoo.security.tls.policy.Role;
import org.junit.Test;
import javax.security.auth.x500.X500Principal;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.cert.X509Certificate;
import java.time.Instant;
import java.time.temporal.ChronoUnit;
import java.util.Arrays;
import java.util.Set;
import static com.yahoo.security.SignatureAlgorithm.SHA256_WITH_ECDSA;
import static com.yahoo.security.tls.policy.RequiredPeerCredential.Field.CN;
import static com.yahoo.security.tls.policy.RequiredPeerCredential.Field.SAN_DNS;
import static java.util.Collections.emptySet;
import static java.util.stream.Collectors.toSet;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* @author bjorncs
*/
public class PeerAuthorizerTest {
private static final KeyPair KEY_PAIR = KeyUtils.generateKeypair(KeyAlgorithm.EC);
private static final String ROLE_1 = "role-1", ROLE_2 = "role-2", ROLE_3 = "role-3", POLICY_1 = "policy-1", POLICY_2 = "policy-2";
@Test
public void certificate_must_match_both_san_and_cn_pattern() {
RequiredPeerCredential cnRequirement = createRequiredCredential(CN, "*.matching.cn");
RequiredPeerCredential sanRequirement = createRequiredCredential(SAN_DNS, "*.matching.san");
PeerAuthorizer authorizer = createPeerAuthorizer(createPolicy(POLICY_1, createRoles(ROLE_1), cnRequirement, sanRequirement));
AuthorizationResult result = authorizer.authorizePeer(createCertificate("foo.matching.cn", "foo.matching.san", "foo.invalid.san"));
assertAuthorized(result);
assertThat(result.assumedRoles()).extracting(Role::name).containsOnly(ROLE_1);
assertThat(result.matchedPolicies()).containsOnly(POLICY_1);
assertUnauthorized(authorizer.authorizePeer(createCertificate("foo.invalid.cn", "foo.matching.san")));
assertUnauthorized(authorizer.authorizePeer(createCertificate("foo.invalid.cn", "foo.matching.san", "foo.invalid.san")));
assertUnauthorized(authorizer.authorizePeer(createCertificate("foo.matching.cn", "foo.invalid.san")));
}
@Test
public void can_match_multiple_policies() {
RequiredPeerCredential cnRequirement = createRequiredCredential(CN, "*.matching.cn");
RequiredPeerCredential sanRequirement = createRequiredCredential(SAN_DNS, "*.matching.san");
PeerAuthorizer peerAuthorizer = createPeerAuthorizer(
createPolicy(POLICY_1, createRoles(ROLE_1, ROLE_2), cnRequirement, sanRequirement),
createPolicy(POLICY_2, createRoles(ROLE_2, ROLE_3), cnRequirement, sanRequirement));
AuthorizationResult result = peerAuthorizer
.authorizePeer(createCertificate("foo.matching.cn", "foo.matching.san"));
assertAuthorized(result);
assertThat(result.assumedRoles()).extracting(Role::name).containsOnly(ROLE_1, ROLE_2, ROLE_3);
assertThat(result.matchedPolicies()).containsOnly(POLICY_1, POLICY_2);
}
@Test
public void can_match_subset_of_policies() {
PeerAuthorizer peerAuthorizer = createPeerAuthorizer(
createPolicy(POLICY_1, createRoles(ROLE_1), createRequiredCredential(CN, "*.matching.cn")),
createPolicy(POLICY_2, createRoles(ROLE_1, ROLE_2), createRequiredCredential(SAN_DNS, "*.matching.san")));
AuthorizationResult result = peerAuthorizer.authorizePeer(createCertificate("foo.invalid.cn", "foo.matching.san"));
assertAuthorized(result);
assertThat(result.assumedRoles()).extracting(Role::name).containsOnly(ROLE_1, ROLE_2);
assertThat(result.matchedPolicies()).containsOnly(POLICY_2);
}
@Test
public void must_match_all_cn_and_san_patterns() {
RequiredPeerCredential cnSuffixRequirement = createRequiredCredential(CN, "*.*.matching.suffix.cn");
RequiredPeerCredential cnPrefixRequirement = createRequiredCredential(CN, "matching.prefix.*.*.*");
RequiredPeerCredential sanPrefixRequirement = createRequiredCredential(SAN_DNS, "*.*.matching.suffix.san");
RequiredPeerCredential sanSuffixRequirement = createRequiredCredential(SAN_DNS, "matching.prefix.*.*.*");
PeerAuthorizer peerAuthorizer = createPeerAuthorizer(
createPolicy(POLICY_1, emptySet(), cnSuffixRequirement, cnPrefixRequirement, sanPrefixRequirement, sanSuffixRequirement));
assertAuthorized(peerAuthorizer.authorizePeer(createCertificate("matching.prefix.matching.suffix.cn", "matching.prefix.matching.suffix.san")));
assertUnauthorized(peerAuthorizer.authorizePeer(createCertificate("matching.prefix.matching.suffix.cn", "matching.prefix.invalid.suffix.san")));
assertUnauthorized(peerAuthorizer.authorizePeer(createCertificate("invalid.prefix.matching.suffix.cn", "matching.prefix.matching.suffix.san")));
}
private static X509Certificate createCertificate(String subjectCn, String... sanCns) {
X509CertificateBuilder builder =
X509CertificateBuilder.fromKeypair(
KEY_PAIR,
new X500Principal("CN=" + subjectCn),
Instant.EPOCH,
Instant.EPOCH.plus(100000, ChronoUnit.DAYS),
SHA256_WITH_ECDSA,
BigInteger.ONE);
for (String sanCn : sanCns) {
builder.addSubjectAlternativeName(sanCn);
}
return builder.build();
}
private static RequiredPeerCredential createRequiredCredential(Field field, String pattern) {
return RequiredPeerCredential.of(field, pattern);
}
private static Set<Role> createRoles(String... roleNames) {
return Arrays.stream(roleNames).map(Role::new).collect(toSet());
}
private static PeerAuthorizer createPeerAuthorizer(PeerPolicy... policies) {
return new PeerAuthorizer(new AuthorizedPeers(Arrays.stream(policies).collect(toSet())));
}
private static PeerPolicy createPolicy(String name, Set<Role> roles, RequiredPeerCredential... requiredCredentials) {
return new PeerPolicy(name, roles, Arrays.asList(requiredCredentials));
}
private static void assertAuthorized(AuthorizationResult result) {
assertTrue(result.succeeded());
}
private static void assertUnauthorized(AuthorizationResult result) {
assertFalse(result.succeeded());
}
}
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