software.amazon.awssdk.services.kms.endpoints.internal.RulesFunctions Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of kms Show documentation
Show all versions of kms Show documentation
The AWS Java SDK for AWS KMS module holds the client classes that are used for communicating with AWS
Key Management Service
/*
* Copyright Amazon.com, Inc. 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. A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 software.amazon.awssdk.services.kms.endpoints.internal;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Supplier;
import java.util.regex.Pattern;
import software.amazon.awssdk.annotations.SdkInternalApi;
import software.amazon.awssdk.core.exception.SdkClientException;
@SdkInternalApi
public class RulesFunctions {
private static final Pattern VALID_HOST_LABEL_SUBDOMAINS = Pattern.compile("[a-zA-Z\\d][a-zA-Z\\d\\-.]{0,62}");
private static final Pattern VALID_HOST_LABEL = Pattern.compile("[a-zA-Z\\d][a-zA-Z\\d\\-]{0,62}");
private static final Pattern VIRTUAL_HOSTABLE_BUCKET = Pattern.compile("[a-z\\d][a-z\\d\\-.]{1,61}[a-z\\d]");
private static final Pattern VIRTUAL_HOSTABLE_BUCKET_NO_SUBDOMAINS = Pattern.compile("[a-z\\d][a-z\\d\\-]{1,61}[a-z\\d]");
private static final Pattern NO_IPS = Pattern.compile("(\\d+\\.){3}\\d+");
private static final Pattern NO_CONSECUTIVE_DASH_OR_DOTS = Pattern.compile(".*[.-]{2}.*");
private static final String[] ENCODED_CHARACTERS = { "+", "*", "%7E" };
private static final String[] ENCODED_CHARACTERS_REPLACEMENTS = { "%20", "%2A", "~" };
private static final LazyValue PARTITION_DATA = LazyValue. builder()
.initializer(RulesFunctions::loadPartitionData).build();
private static final LazyValue AWS_PARTITION = LazyValue. builder()
.initializer(RulesFunctions::findAwsPartition).build();
public static String substring(String input, int start, int stop, boolean reverse) {
int len = input.length();
if (start >= stop || len < stop) {
return null;
}
int realStart = start;
int realStop = stop;
if (reverse) {
realStart = len - stop;
realStop = len - start;
}
StringBuilder result = new StringBuilder(realStop - realStart);
for (int idx = realStart; idx < realStop; idx++) {
char ch = input.charAt(idx);
if (ch > 0x7F) {
return null;
}
result.append(ch);
}
return result.toString();
}
// URI related functions
public static String uriEncode(String uri) {
try {
String encoded = URLEncoder.encode(uri, "UTF-8");
for (int i = 0; i < ENCODED_CHARACTERS.length; i++) {
encoded = encoded.replace(ENCODED_CHARACTERS[i], ENCODED_CHARACTERS_REPLACEMENTS[i]);
}
return encoded;
} catch (UnsupportedEncodingException e) {
throw SdkClientException.create("Unable to URI encode value: " + uri, e);
}
}
public static RuleUrl parseURL(String url) {
try {
return RuleUrl.parse(url);
} catch (MalformedURLException e) {
return null;
}
}
public static boolean isValidHostLabel(String value, boolean allowSubDomains) {
if (allowSubDomains) {
return VALID_HOST_LABEL_SUBDOMAINS.matcher(value).matches();
}
return VALID_HOST_LABEL.matcher(value).matches();
}
// AWS related functions
public static RulePartition awsPartition(String regionName) {
PartitionData data = PARTITION_DATA.value();
Partition matchedPartition;
// Known region
matchedPartition = data.regionMap.get(regionName);
if (matchedPartition == null) {
// try matching on region name pattern
for (Partition p : data.partitions) {
Pattern regex = Pattern.compile(p.regionRegex());
if (regex.matcher(regionName).matches()) {
matchedPartition = p;
break;
}
}
}
// Couldn't find the region by name or pattern matching. Fallback to 'aws' partition.
if (matchedPartition == null) {
matchedPartition = AWS_PARTITION.value();
}
return RulePartition.from(matchedPartition.id(), matchedPartition.outputs());
}
public static RuleArn awsParseArn(String value) {
return RuleArn.parse(value);
}
public static boolean stringEquals(String left, String right) {
if (left == null || right == null) {
return false;
}
return left.equals(right);
}
public static T listAccess(List values, int index) {
if (values == null) {
return null;
}
if (index >= values.size()) {
return null;
}
return values.get(index);
}
public static boolean awsIsVirtualHostableS3Bucket(String hostLabel, boolean allowSubDomains) {
if (allowSubDomains) {
return VIRTUAL_HOSTABLE_BUCKET.matcher(hostLabel).matches()
// don't allow ip address
&& !NO_IPS.matcher(hostLabel).matches() && !NO_CONSECUTIVE_DASH_OR_DOTS.matcher(hostLabel).matches();
}
return VIRTUAL_HOSTABLE_BUCKET_NO_SUBDOMAINS.matcher(hostLabel).matches();
}
private static PartitionData loadPartitionData() {
PartitionDataProvider provider = new DefaultPartitionDataProvider();
// TODO: support custom partitions.json
Partitions partitions = provider.loadPartitions();
PartitionData partitionData = new PartitionData();
partitions.partitions().forEach(part -> {
partitionData.partitions.add(part);
part.regions().forEach((name, override) -> {
partitionData.regionMap.put(name, part);
});
});
return partitionData;
}
private static Partition findAwsPartition() {
return PARTITION_DATA.value().partitions.stream().filter(p -> p.id().equalsIgnoreCase("aws")).findFirst().orElse(null);
}
private static class PartitionData {
private final List partitions = new ArrayList<>();
private final Map regionMap = new HashMap<>();
}
private static final class LazyValue {
private final Supplier initializer;
private T value;
private boolean initialized;
private LazyValue(Builder builder) {
this.initializer = builder.initializer;
}
public T value() {
if (!initialized) {
value = initializer.get();
initialized = true;
}
return value;
}
public static Builder builder() {
return new Builder<>();
}
public static class Builder {
private Supplier initializer;
public Builder initializer(Supplier initializer) {
this.initializer = initializer;
return this;
}
public LazyValue build() {
return new LazyValue<>(this);
}
}
}
}