org.springframework.boot.ssl.pem.PemContent Maven / Gradle / Ivy
/*
* Copyright 2012-2023 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License 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 org.springframework.boot.ssl.pem;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.regex.Pattern;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.ResourceUtils;
/**
* Utility to load PEM content.
*
* @author Scott Frederick
* @author Phillip Webb
*/
final class PemContent {
private static final Pattern PEM_HEADER = Pattern.compile("-+BEGIN\\s+[^-]*-+", Pattern.CASE_INSENSITIVE);
private static final Pattern PEM_FOOTER = Pattern.compile("-+END\\s+[^-]*-+", Pattern.CASE_INSENSITIVE);
private PemContent() {
}
static String load(String content) {
if (content == null || isPemContent(content)) {
return content;
}
try {
URL url = ResourceUtils.getURL(content);
try (Reader reader = new InputStreamReader(url.openStream(), StandardCharsets.UTF_8)) {
return FileCopyUtils.copyToString(reader);
}
}
catch (IOException ex) {
throw new IllegalStateException(
"Error reading certificate or key from file '" + content + "':" + ex.getMessage(), ex);
}
}
private static boolean isPemContent(String content) {
return content != null && PEM_HEADER.matcher(content).find() && PEM_FOOTER.matcher(content).find();
}
}