Proxy 가 적용된 네트워크 환경에서 java 코드를 이용해 Remote 사이트에 접속을 시도하는 경우 Remote site 의 인증서가 신뢰하는 인증기관 인증서 목록에 없으면 오류가 발생한다. 이런 경우 아래와 같이 인증서를 넣어주면 해결 할 수 있다.
- 해당 내용을 복사하여 InstallCertProxy.java 파일로 만든다.
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;
public class InstallCertProxy {
public static void main(String[] args) throws Exception {
String httpsUrl = null;
String host;
int port;
char[] passphrase;
if (args.length == 0) {
httpsUrl = "https://www.google.com/";
port = 443;
host = "www.google.com";
passphrase = "changeit".toCharArray();
} else if ((args.length == 1) || (args.length == 2)) {
String[] c = args[0].split(":");
host = c[0];
port = (c.length == 1) ? 443 : Integer.parseInt(c[1]);
String p = (args.length == 1) ? "changeit" : args[1];
passphrase = p.toCharArray();
httpsUrl = "https://" + host;
if (port != 443) {
httpsUrl += ":" + port;
}
} else {
System.out.println("Usage: java InstallCert [host:port] [passphrase]");
return;
}
System.out.println("target: " + httpsUrl);
File file = new File("jssecacerts");
if (file.isFile() == false) {
char SEP = File.separatorChar;
File dir = new File(System.getProperty("java.home") + SEP + "lib"
+ SEP + "security");
file = new File(dir, "jssecacerts");
if (file.isFile() == false) {
file = new File(dir, "cacerts");
}
}
System.out.println("Loading KeyStore " + file + "...");
InputStream in = new FileInputStream(file);
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(in, passphrase);
in.close();
SSLContext context = SSLContext.getInstance("TLS");
TrustManagerFactory tmf = TrustManagerFactory
.getInstance(TrustManagerFactory.getDefaultAlgorithm());
tmf.init(ks);
X509TrustManager defaultTrustManager = (X509TrustManager) tmf
.getTrustManagers()[0];
SavingTrustManager tm = new SavingTrustManager(defaultTrustManager);
context.init(null, new TrustManager[] { tm }, null);
SSLSocketFactory factory = context.getSocketFactory();
System.out
.println("Opening connection to " + host + ":" + port + "...");
String httpsProxyHost = System.getProperty("https.proxyHost");
String httpsProxyPortStr = System.getProperty("https.proxyPort");
int httpsProxyPort = httpsProxyPortStr != null ? Integer.parseInt(httpsProxyPortStr) : 8080;
if (httpsProxyHost == null) {
System.err.println("Please set your https proxy : example -Dhttps.proxyHost=proxy -Dhttps.proxyPort=80");
}
URL url = new URL(httpsUrl);
Proxy p = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(
httpsProxyHost, httpsProxyPort));
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection(p);
conn.setSSLSocketFactory(factory);
conn.setConnectTimeout(3000); // 3 seconds.
conn.setReadTimeout(3000); // 3 seconds
conn.setRequestProperty("User-Agent",
"Mozilla/5.0 (Windows NT 6.0; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0");
try {
System.out.println("Starting SSL handshake...");
conn.connect();
System.out.println();
System.out.println("No errors, certificate is already trusted");
} catch (SSLException e) {
System.out.println();
e.printStackTrace(System.out);
} finally {
conn.disconnect();
}
X509Certificate[] chain = tm.chain;
if (chain == null) {
System.out.println("Could not obtain server certificate chain");
return;
}
BufferedReader reader = new BufferedReader(new InputStreamReader(
System.in));
System.out.println();
System.out.println("Server sent " + chain.length + " certificate(s):");
System.out.println();
MessageDigest sha1 = MessageDigest.getInstance("SHA1");
MessageDigest md5 = MessageDigest.getInstance("MD5");
for (int i = 0; i < chain.length; i++) {
X509Certificate cert = chain[i];
System.out.println(" " + (i + 1) + " Subject "
+ cert.getSubjectDN());
System.out.println(" Issuer " + cert.getIssuerDN());
sha1.update(cert.getEncoded());
System.out.println(" sha1 " + toHexString(sha1.digest()));
md5.update(cert.getEncoded());
System.out.println(" md5 " + toHexString(md5.digest()));
System.out.println();
}
System.out
.println("Enter certificate to add to trusted keystore or 'q' to quit: [1]");
String line = reader.readLine().trim();
int k;
try {
k = (line.length() == 0) ? 0 : Integer.parseInt(line) - 1;
} catch (NumberFormatException e) {
System.out.println("KeyStore not changed");
return;
}
X509Certificate cert = chain[k];
String alias = host + "-" + (k + 1);
ks.setCertificateEntry(alias, cert);
OutputStream out = new FileOutputStream(file);
ks.store(out,passphrase);
out.close();
System.out.println();
System.out.println(cert);
System.out.println();
System.out
.println("Added certificate to keystore " + file.getAbsolutePath() + " using alias '"
+ alias + "'");
}
private static final char[] HEXDIGITS = "0123456789abcdef".toCharArray();
private static String toHexString(byte[] bytes) {
StringBuilder sb = new StringBuilder(bytes.length * 3);
for (int b : bytes) {
b &= 0xff;
sb.append(HEXDIGITS[b >> 4]);
sb.append(HEXDIGITS[b & 15]);
sb.append(' ');
}
return sb.toString();
}
private static class SavingTrustManager implements X509TrustManager {
private final X509TrustManager tm;
private X509Certificate[] chain;
SavingTrustManager(X509TrustManager tm) {
this.tm = tm;
}
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
// throw new UnsupportedOperationException();
// src: http://infposs.blogspot.nl/2013/06/installcert-and-java-7.html
}
public void checkClientTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
throw new UnsupportedOperationException();
}
public void checkServerTrusted(X509Certificate[] chain, String authType)
throws CertificateException {
this.chain = chain;
tm.checkServerTrusted(chain, authType);
}
}
}
- java 파일 내용중 Proxy 정보를 수정한다
String httpsProxyHost = System.getProperty("https.proxyHost"); String httpsProxyPortStr = System.getProperty("https.proxyPort");
String httpsProxyHost = "10.10.10.10";
String httpsProxyPortStr = "8080";
- cmd 창에서 파일을 컴파일 한다.
javac InstallCertProxy.java
- cmd 창에서 컴파일 된 파일에 remote 사이트 정보를 넣어서 실행한다.
java –cp ./ InstallCertProxy start.spring.io
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