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Code Pull Requests 2 Activity

DNS TXT Record Verification against super-domain

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This commit is contained in:
Michael Hoennig 2024-09-09 15:01:47 +02:00
parent 5b6cf99b9c
commit 888e53397d
3 changed files with 139 additions and 44 deletions
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17
src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/Dns.java
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@ -13,6 +13,7 @@ import java.util.HashMap;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import static java.util.Arrays.stream;
import static java.util.Collections.emptyList;
@ -39,6 +40,14 @@ public class Dns {
public record Result(Status status, List<String> records, NamingException exception) {
public static Optional<String> superDomain(final String domainName) {
final var parts = domainName.split("\\.", 2);
if (parts.length == 2) {
return Optional.of(parts[1]);
}
return Optional.empty();
}
public static Result fromRecords(final NamingEnumeration<?> recordEnumeration) {
final List<String> records = recordEnumeration == null
? emptyList()
@ -52,10 +61,10 @@ public class Dns {
public static Result fromException(final NamingException exception) {
return switch (exception) {
case ServiceUnavailableException exc -> new Result(Status.SERVICE_UNAVAILABLE, null, exc);
case NameNotFoundException exc -> new Result(Status.NAME_NOT_FOUND, null, exc);
case InvalidNameException exc -> new Result(Status.INVALID_NAME, null, exc);
case NamingException exc -> new Result(Status.UNKNOWN_FAILURE, null, exc);
case ServiceUnavailableException exc -> new Result(Status.SERVICE_UNAVAILABLE, emptyList(), exc);
case NameNotFoundException exc -> new Result(Status.NAME_NOT_FOUND, emptyList(), exc);
case InvalidNameException exc -> new Result(Status.INVALID_NAME, emptyList(), exc);
case NamingException exc -> new Result(Status.UNKNOWN_FAILURE, emptyList(), exc);
};
}
}

34
src/main/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainSetupHostingAssetValidator.java
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@ -4,9 +4,11 @@ import net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAsset;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.regex.Pattern;
import static net.hostsharing.hsadminng.hs.hosting.asset.HsHostingAssetType.DOMAIN_SETUP;
import static net.hostsharing.hsadminng.hs.hosting.asset.validators.Dns.Result.superDomain;
import static net.hostsharing.hsadminng.hs.hosting.asset.validators.HsDomainHttpSetupHostingAssetValidator.SUBDOMAIN_NAME_REGEX;
class HsDomainSetupHostingAssetValidator extends HostingAssetEntityValidator {
@ -15,7 +17,8 @@ class HsDomainSetupHostingAssetValidator extends HostingAssetEntityValidator {
public static final String DOMAIN_NAME_PROPERTY_NAME = "domainName";
HsDomainSetupHostingAssetValidator() {
super( DOMAIN_SETUP,
super(
DOMAIN_SETUP,
AlarmContact.isOptional(),
NO_EXTRA_PROPERTIES);
@ -47,13 +50,22 @@ class HsDomainSetupHostingAssetValidator extends HostingAssetEntityValidator {
public List<String> validateEntity(final HsHostingAsset assetEntity) {
final var violations = new ArrayList<String>();
final var result = new Dns(assetEntity.getIdentifier()).fetchRecordsOfType("TXT");
switch ( result.status() ) {
final var domainName = assetEntity.getIdentifier();
final var dnsResult = new Dns(domainName).fetchRecordsOfType("TXT");
switch (dnsResult.status()) {
case Dns.Status.SUCCESS:
final var code = assetEntity.getBookingItem().getDirectValue("verificationCode", String.class);
final var found = result.records().stream().filter(r -> r.contains("Hostsharing-domain-setup-verification-code=" + code)).findAny();
final var expectedTxtRecordValue = "Hostsharing-domain-setup-verification-code=" + code;
final var found = findTxtRecord(dnsResult, expectedTxtRecordValue)
.or(() -> superDomain(domainName)
.flatMap(superDomainName -> findTxtRecord(
new Dns(superDomainName).fetchRecordsOfType("TXT"),
expectedTxtRecordValue))
);
if (found.isEmpty()) {
violations.add("[DNS] no TXT record 'Hostsharing-domain-setup-verification="+code+"' with valid hash found for domain name '" + assetEntity.getIdentifier() + "'");
violations.add(
"[DNS] no TXT record 'Hostsharing-domain-setup-verification=" + code + "' found for domain name '"
+ assetEntity.getIdentifier() + "'");
}
break;
@ -67,19 +79,25 @@ class HsDomainSetupHostingAssetValidator extends HostingAssetEntityValidator {
case Dns.Status.SERVICE_UNAVAILABLE:
case Dns.Status.UNKNOWN_FAILURE:
violations.add("[DNS] lookup failed for domain name '" + assetEntity.getIdentifier() + "': " + result.exception());
violations.add("[DNS] lookup failed for domain name '" + assetEntity.getIdentifier() + "': " + dnsResult.exception());
break;
}
violations.addAll(super.validateEntity(assetEntity));
return violations;
}
private static Optional<String> findTxtRecord(final Dns.Result result, final String expectedTxtRecordValue) {
return result.records().stream()
.filter(r -> r.contains(expectedTxtRecordValue))
.findAny();
}
@Override
protected Pattern identifierPattern(final HsHostingAsset assetEntity) {
if (assetEntity.getBookingItem() != null) {
final var bookingItemDomainName = assetEntity.getBookingItem().getDirectValue(DOMAIN_NAME_PROPERTY_NAME, String.class);
final var bookingItemDomainName = assetEntity.getBookingItem()
.getDirectValue(DOMAIN_NAME_PROPERTY_NAME, String.class);
return Pattern.compile(bookingItemDomainName, Pattern.CASE_INSENSITIVE | Pattern.LITERAL);
}
final var parentDomainName = assetEntity.getParentAsset().getIdentifier();

80
src/test/java/net/hostsharing/hsadminng/hs/hosting/asset/validators/HsDomainSetupHostingAssetValidatorUnitTest.java
View File

@ -236,7 +236,7 @@ class HsDomainSetupHostingAssetValidatorUnitTest {
}
@Test
void allowSetupOfNonExistingSubdomainOfRegistrarLevelDomain() {
void allowSetupOfAvailableRegistrableDomain() {
// given
final var domainSetupHostingAssetEntity = validEntityBuilder().build();
@ -254,12 +254,13 @@ class HsDomainSetupHostingAssetValidatorUnitTest {
}
@Test
void rejectSetupOfExistingDomainWithInvalidDnsVerification() {
void rejectSetupOfExistingRegistrableDomainWithoutValidDnsVerification() {
// given
final var domainSetupHostingAssetEntity = validEntityBuilder().build();
final var domainName = domainSetupHostingAssetEntity.getIdentifier();
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem().getDirectValue("verificationCode", String.class);
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem()
.getDirectValue("verificationCode", String.class);
Dns.fakeResultForDomain(
domainName,
Dns.Result.fromRecords("Hostsharing-domain-setup-verification-code=SOME-DEFINITELY-WRONG-HASH"));
@ -269,16 +270,18 @@ class HsDomainSetupHostingAssetValidatorUnitTest {
final var result = validator.validateEntity(domainSetupHostingAssetEntity);
// then
assertThat(result).contains("[DNS] no TXT record 'Hostsharing-domain-setup-verification=" + expectedHash + "' with valid hash found for domain name 'example.org'");
assertThat(result).contains("[DNS] no TXT record 'Hostsharing-domain-setup-verification=" + expectedHash
+ "' found for domain name 'example.org'");
}
@Test
void allowSetupOfExistingDomainWithValidDnsVerification() {
void allowSetupOfExistingRegistrableDomainWithValidDnsVerification() {
// given
final var domainSetupHostingAssetEntity = validEntityBuilder().build();
final var domainName = domainSetupHostingAssetEntity.getIdentifier();
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem().getDirectValue("verificationCode", String.class);
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem()
.getDirectValue("verificationCode", String.class);
Dns.fakeResultForDomain(
domainName,
Dns.Result.fromRecords("Hostsharing-domain-setup-verification-code=" + expectedHash));
@ -291,6 +294,71 @@ class HsDomainSetupHostingAssetValidatorUnitTest {
assertThat(result).isEmpty();
}
@Test
void allowSetupOfUnregisteredSubdomainWithValidDnsVerificationInSuperDomain() {
// given
final var domainSetupHostingAssetEntity = validEntityBuilder("sub.example.org").build();
// ... the new subdomain is not yet registered:
Dns.fakeResultForDomain(
"sub.example.org",
Dns.Result.fromException(new NameNotFoundException("domain not registered")));
// ... and a valid verification-code in the super-domain:
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem()
.getDirectValue("verificationCode", String.class);
Dns.fakeResultForDomain(
"example.org",
Dns.Result.fromRecords("Hostsharing-domain-setup-verification-code=" + expectedHash));
final var validator = HostingAssetEntityValidatorRegistry.forType(domainSetupHostingAssetEntity.getType());
// when
final var result = validator.validateEntity(domainSetupHostingAssetEntity);
// then
assertThat(result).isEmpty();
}
@Test
void allowSetupOfExistingSubdomainWithValidDnsVerificationInSuperDomain() {
// given
final var domainSetupHostingAssetEntity = validEntityBuilder("sub.example.org").build();
// ... the new subdomain is already registered:
Dns.fakeResultForDomain("sub.example.org", Dns.Result.fromRecords());
// ... and a valid verification-code in the super-domain:
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem()
.getDirectValue("verificationCode", String.class);
Dns.fakeResultForDomain(
"example.org",
Dns.Result.fromRecords("Hostsharing-domain-setup-verification-code=" + expectedHash));
final var validator = HostingAssetEntityValidatorRegistry.forType(domainSetupHostingAssetEntity.getType());
// when
final var result = validator.validateEntity(domainSetupHostingAssetEntity);
// then
assertThat(result).isEmpty();
}
@Test
void rejectSetupOfExistingSubdomainWithoutDnsVerification() {
// given
final var domainSetupHostingAssetEntity = validEntityBuilder("sub.example.org").build();
// ... the new subdomain is already registered:
Dns.fakeResultForDomain("sub.example.org", Dns.Result.fromRecords());
final var expectedHash = domainSetupHostingAssetEntity.getBookingItem()
.getDirectValue("verificationCode", String.class);
final var validator = HostingAssetEntityValidatorRegistry.forType(domainSetupHostingAssetEntity.getType());
// when
final var result = validator.validateEntity(domainSetupHostingAssetEntity);
// then
assertThat(result).contains("[DNS] no TXT record 'Hostsharing-domain-setup-verification=" + expectedHash
+ "' found for domain name 'sub.example.org'");
}
private static HsHostingAssetRealEntity createValidParentDomainSetupAsset(final String parentDomainName) {
final var bookingItem = HsBookingItemRealEntity.builder()
.type(HsBookingItemType.DOMAIN_SETUP)