io.netty.handler.ssl.PemReader Maven / Gradle / Ivy
/*
* Copyright 2014 The Netty Project
*
* The Netty Project licenses this file to you 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:
*
* http://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 io.netty.handler.ssl;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.base64.Base64;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.logging.InternalLogger;
import io.netty.util.internal.logging.InternalLoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.KeyException;
import java.security.KeyStore;
import java.security.cert.CertificateException;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Reads a PEM file and converts it into a list of DERs so that they are imported into a {@link KeyStore} easily.
*/
final class PemReader {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(PemReader.class);
private static final Pattern CERT_PATTERN = Pattern.compile(
"-+BEGIN\\s+.*CERTIFICATE[^-]*-+(?:\\s|\\r|\\n)+" + // Header
"([a-z0-9+/=\\r\\n]+)" + // Base64 text
"-+END\\s+.*CERTIFICATE[^-]*-+", // Footer
Pattern.CASE_INSENSITIVE);
private static final Pattern KEY_PATTERN = Pattern.compile(
"-+BEGIN\\s+.*PRIVATE\\s+KEY[^-]*-+(?:\\s|\\r|\\n)+" + // Header
"([a-z0-9+/=\\r\\n]+)" + // Base64 text
"-+END\\s+.*PRIVATE\\s+KEY[^-]*-+", // Footer
Pattern.CASE_INSENSITIVE);
static ByteBuf[] readCertificates(File file) throws CertificateException {
String content;
try {
content = readContent(file);
} catch (IOException e) {
throw new CertificateException("failed to read a file: " + file, e);
}
List certs = new ArrayList();
Matcher m = CERT_PATTERN.matcher(content);
int start = 0;
for (;;) {
if (!m.find(start)) {
break;
}
ByteBuf base64 = Unpooled.copiedBuffer(m.group(1), CharsetUtil.US_ASCII);
ByteBuf der = Base64.decode(base64);
base64.release();
certs.add(der);
start = m.end();
}
if (certs.isEmpty()) {
throw new CertificateException("found no certificates: " + file);
}
return certs.toArray(new ByteBuf[certs.size()]);
}
static ByteBuf readPrivateKey(File file) throws KeyException {
String content;
try {
content = readContent(file);
} catch (IOException e) {
throw new KeyException("failed to read a file: " + file, e);
}
Matcher m = KEY_PATTERN.matcher(content);
if (!m.find()) {
throw new KeyException("found no private key: " + file);
}
ByteBuf base64 = Unpooled.copiedBuffer(m.group(1), CharsetUtil.US_ASCII);
ByteBuf der = Base64.decode(base64);
base64.release();
return der;
}
private static String readContent(File file) throws IOException {
InputStream in = new FileInputStream(file);
ByteArrayOutputStream out = new ByteArrayOutputStream();
try {
byte[] buf = new byte[8192];
for (;;) {
int ret = in.read(buf);
if (ret < 0) {
break;
}
out.write(buf, 0, ret);
}
return out.toString(CharsetUtil.US_ASCII.name());
} finally {
safeClose(in);
safeClose(out);
}
}
private static void safeClose(InputStream in) {
try {
in.close();
} catch (IOException e) {
logger.warn("Failed to close a stream.", e);
}
}
private static void safeClose(OutputStream out) {
try {
out.close();
} catch (IOException e) {
logger.warn("Failed to close a stream.", e);
}
}
private PemReader() { }
}