JAVA SSL(https)인증신뢰 - Java PKIX path building failed 문제해결
#인증서#도메인#domain#ssl#등록하기
자바에서 https 적용된 사이트를 접속하기 위한방법
신뢰하지 못한 상태에서의 에러
Exception in thread "main" javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1946)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:316)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
...
...
keytool 사용법
신뢰된 인증서 보기 (default password = changeit)
keytool -list -trustcacerts -keystore "%JAVA_HOME%jre\lib\security\cacerts" -storepass changeit
인증서 추가하기
keytool -trustcacerts -keystore "%JAVA_HOME%jre\lib\security\cacerts" -importcert -alias <Alias명> -file "D:\저장된인증서파일.cer"
인증서 삭제하기
keytool -delete -alias <Alias명> -keystore "%JAVA_HOME%jre\lib\security\cacerts" -storepass changeit
웹브라우저에서 인증서 파일 출력해 적용
1) 브라우저 자물쇠 > 인증서보기에서 인증서 파일을 복사 실행
DER로 인코딩된 바이너리 X.509(.CER)(D) 선택 후 파일 저장
2) 추가할 JAVA 홈을 지정해 인증서 파일을 추가한다.
keytool -trustcacerts -keystore "%JAVA_HOME%jre\lib\security\cacerts" -importcert -alias polcyber -file "D:\저장된인증서파일.cer"
서버인증서를 검색하는 JAVA프로그램을 통한 인증서 생성
참조 :: https://github.com/escline/InstallCert
JAVA 파일 소스는 아래쪽 별도 참조
JAVA 프로그램을 실행해 스토어생성
javac InstallCert.java
java -cp ./ InstallCert emunhi.com
....
...
Certificate Extensions: 1
[1]: ObjectId: 2.5.29.17 Criticality=false
SubjectAlternativeName [
DNSName: emunhi.com
]
]
Algorithm: [SHA256withRSA]
Signature:
0000: 31 95 E9 D4 4B FE B6 58 B7 25 E2 24 8C 6D E0 EB 1...K..X.%.$.m..
0010: A6 40 0E BE 8E E6 C6 39 76 FF 1E B6 E7 26 4B D7 .@.....9v....&K.
0020: 99 9A 11 25 F5 2F 25 5F 10 C9 D9 09 D5 C6 EB 9F ...%./%_........
0030: 18 FC A8 6D 28 AE FE BE 78 DE 91 A3 1F F7 3C 23 ...m(...x.....<#
0040: 74 BF 6D 3B 6B 9C BD 42 55 F7 06 43 D2 F7 91 3F t.m;k..BU..C...?
0050: F7 A9 ED FF 13 5B 72 FC AD 77 4E 96 0E A8 8E DE .....[r..wN.....
0060: C1 C6 C3 5D 24 7B 63 BF 63 F7 7B 2D 30 F1 A4 8A ...]$.c.c..-0...
0070: DA E1 9B 27 AD FA B1 FA 3C DF AF 1E 0C F5 49 75 ...'....<.....Iu
0080: 0C 94 6B 3F 91 EA 3E 1B 79 58 01 44 E7 32 98 42 ..k?..>.yX.D.2.B
0090: 83 29 53 07 7C 4F 23 75 34 36 4C 63 9D 24 7B 91 .)S..O#u46Lc.$..
00A0: 82 21 82 90 91 A4 AC 43 C6 83 55 3B E6 84 2A 49 .!.....C..U;..*I
00B0: E8 DB A9 F4 4F 7C EF 69 4B 26 4F E8 49 1F 9A A8 ....O..iK&O.I...
00C0: 1B C9 5D 82 3E D8 97 B0 AE 3C 6D 38 12 73 51 F1 ..].>....<m8.sQ.
00D0: B1 C0 A4 ED 38 73 E5 12 7B 49 38 AC 0F 90 BD E4 ....8s...I8.....
00E0: 58 34 A4 85 FA D1 14 60 4F 96 EC 32 10 F9 CD D6 X4.....`O..2....
00F0: 1C 6F 2F 3F 25 A2 ED 80 55 B3 44 7F CF 34 B4 2A .o/?%...U.D..4.*
]
Added certificate to keystore 'jssecacerts' using alias 'emunhi.com-1'
java파일을 컴파일 후 실행하면 키스토어 jssecacerts 파일과 alias가 생성된다.
실행결과 파일로 부터 인증서 파일 추출
keytool -exportcert -keystore "<파일위치>\jssecacerts" -storepass changeit -file <출력인증서파일명.cert> -alias <emunhi.com-1>
출력인증서 파일을 JAVA인증에 추가한다.
keytool -importcert -keystore "%JAVA_HOME%jre\lib\security\cacerts" -file <출력인증서파일명.cert> -alias <emunhi.com-1>
모든인증서를 허용하는 JAVA 소스를 통한 해결방법
/**
* SSL 인증서에 대해 모두 신뢰하도록 처리를 한다.
*/
public static void trustSSL() {
try {
TrustManager[] trustAllCerts = new TrustManager[] {
new X509TrustManager() {
@Override
public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {}
@Override
public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
//return null;
}
}
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
e.printStackTrace();
}
}
* 인증서 취득 소스
/*
* Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* check out this {@link https://www.lesstif.com/pages/viewpage.action?pageId=12451848}
*
* Usage:
*
* 1. download source
* curl -O https://gist.githubusercontent.com/lesstif/cd26f57b7cfd2cd55241b20e05b5cd93/raw/InstallCert.java
*
* 2. compiling
* javac InstallCert.java
*
* 3. Run
* java -cp . InstallCert https://google.com:443
*
* 4. save peer's ssl cert to keystore(name is jssecacerts)
*
* 5. extract cert from saved keystore
* keytool -exportcert -keystore jssecacerts -storepass changeit -file output.cert -alias letsencrypt
*
* 6. import cert into JDK's keystore
* keytool -importcert -keystore ${JAVA_HOME}/jre/lib/security/cacerts -storepass changeit -file output.cert -alias letsencrypt
*
*/
/**
* http://blogs.sun.com/andreas/resource/InstallCert.java
* Use:
* java InstallCert hostname
* Example:
*% java InstallCert ecc.fedora.redhat.com
*/
import javax.net.ssl.*;
import java.io.*;
import java.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
/**
* Class used to add the server's certificate to the KeyStore
* with your trusted certificates.
*/
public class InstallCert {
public static void main(String[] args) throws Exception {
args= new String[] {"emunhi.com"}; << sample 테스트용
String host;
int port;
char[] passphrase;
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();
} else {
System.out.println("Usage: java InstallCert <host>[:port] [passphrase]");
return;
}
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 + "...");
SSLSocket socket = (SSLSocket) factory.createSocket(host, port);
socket.setSoTimeout(10000);
try {
System.out.println("Starting SSL handshake...");
socket.startHandshake();
socket.close();
System.out.println();
System.out.println("No errors, certificate is already trusted");
} catch (SSLException e) {
System.out.println();
e.printStackTrace(System.out);
}
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("jssecacerts");
ks.store(out, passphrase);
out.close();
System.out.println();
System.out.println(cert);
System.out.println();
System.out.println
("Added certificate to keystore 'jssecacerts' 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;
}
@Override
public X509Certificate[] getAcceptedIssuers() {
return new X509Certificate[0];
}
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);
}
}
}