解决 Java 调用 Azure SDK 证书错误 javax.net.ssl.SSLHandshakeException
Azure 作为微软的公有云平台，提供了非常丰富的 SDK 和 API 让开发人员可以非常方便的调用的各项服务，目前除了自家的 .NET、Java、Python、 nodeJS、Ruby，PHP 等语言都提供支持，详细的文档说明请参考：
https://azure.microsoft.com/en-us/documentation/
然而在使用过程中，以 Java 语言为例，在初始调用 Azure SDK/API 的时候大家会碰到类似下面的错误：
[WARN] ServiceBusContract - com.sun.jersey.api.client.ClientHandlerException: 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 <com.sun.jersey.api.client.ClientHandlerException: javax.net.ssl.SSLHandshakeException:sun.security.validator.ValidatorException: PKIX path building failed:sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requestedtarget>com.sun.jersey.api.client.ClientHandlerException: 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 com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:151)
at com.microsoft.windowsazure.services.servicebus.implementation.AuthorizationFilter.handle(AuthorizationFilter.java:39)
at com.microsoft.windowsazure.core.pipeline.jersey.ClientFilterRequestAdapter.handle(ClientFilterRequestAdapter.java:36)
at com.sun.jersey.api.client.Client.handle(Client.java:648)
其实这个错误并不是 Azure 的问题，如果大家搜一搜就知道，只要是你用 Java 去访问 https 的网站或者服务，都会碰到类似的错误，最根本的原因是 CNNIC 所颁发的证书并不被 JDK 所认可，其中原因大家应该懂得：）
言归正传，如何解决这个问题？
1. 等待 Oracle/Google/Mozilla 等等组织信任 CNNIC，算了，洗洗睡吧
2. 使用 Java 的 TrustManager 忽略所有的 SSL 请求的证书，仅仅用于开发测试，限于篇幅不做介绍了
3. 导入目标网站的证书，然后在开始调用之前，指定 keystore 就 ok 了，本文介绍下该方法
在你的 IDE 环境中导入如下文件获取目标网站的证书，该程序是 Sun（已经被 Oracle 收了）的一位大牛写的，名字没有查到，我只是引用一下，不是我写的，对其贡献表示尊重：
package com.azurelabs.china.tools; /*
* 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.
*/
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.security.KeyStore;
import java.security.MessageDigest;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLException;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;
import javax.net.ssl.X509TrustManager;
public class InstallCert {
public static void main(String[] args) throws Exception {
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;
}
public X509Certificate[] getAcceptedIssuers() {
throw new UnsupportedOperationException();
}
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);
}
}
}
复制到你的IDE中，加上你的网站名字作为参数运行，如果是Azure，就使用www.windowsazure.cn作为参数，选择1，回车，就可以得到一个keystore文件：
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(Unknown Source)
at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
at sun.security.ssl.Handshaker.processLoop(Unknown Source)
at sun.security.ssl.Handshaker.process_record(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at com.azurelabs.china.tools.InstallCert.main(InstallCert.java:104)
Caused by: 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.validator.PKIXValidator.doBuild(Unknown Source)
at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
at sun.security.validator.Validator.validate(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
at com.azurelabs.china.tools.InstallCert$SavingTrustManager.checkServerTrusted(InstallCert.java:200)
at sun.security.ssl.AbstractTrustManagerWrapper.checkServerTrusted(Unknown Source)
... 9 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
at java.security.cert.CertPathBuilder.build(Unknown Source)
... 17 moreServer sent 2 certificate(s):
1 Subject CN=support.windowsazure.cn, OU=Azure, O=Shanghai Blue Cloud Technology Co. Ltd, L=Shanghai, ST=Shanghai, C=CN
Issuer CN=WoSign Class 3 OV Server CA G2, O=WoSign CA Limited, C=CN
sha1 39 02 08 52 59 bf 47 97 2f eb f7 8f fc c9 03 ef 26 cb 21 dd
md5 83 28 58 28 51 b8 62 ed 36 e6 d0 70 15 99 a8 382 Subject CN=WoSign Class 3 OV Server CA G2, O=WoSign CA Limited, C=CN
Issuer CN=Certification Authority of WoSign, O=WoSign CA Limited, C=CN
sha1 2b 43 72 46 cc ba 25 15 9e b5 be a1 62 ac 60 18 dc bf f4 72
md5 5f a4 91 6a ab d3 c9 80 09 6c eb 00 31 34 fc 3dEnter certificate to add to trusted keystore or 'q' to quit: [1]
1[
[
Version: V3
Subject: CN=support.windowsazure.cn, OU=Azure, O=Shanghai Blue Cloud Technology Co. Ltd, L=Shanghai, ST=Shanghai, C=CN
Signature Algorithm: SHA256withRSA, OID = 1.2.840.113549.1.1.11Key: Sun RSA public key, 2048 bits
modulus: 24104532407647535108241621827688332263926906187163691939931462013874932504662453335625927986716086247633840840524051115
364996238391743503802118690155144909240897365990040793471910633352618274034556617076873608976668528804939183424686164227185431879
267461919749098227696743182875748132677719418665216178511515782485580061460364614666955611361304411692446552333333850501994838165
659760614012629638654246105220036245117410486536684224500173338204500619911544787890879820586922542656204188700978168997284623863
785685892268535250107770005916206905453265121667987788474107941942533485774966535690717314093662982801373356241
public exponent: 65537
Validity: [From: Tue Nov 24 19:32:28 CST 2015,
To: Fri Nov 24 19:32:28 CST 2017]
Issuer: CN=WoSign Class 3 OV Server CA G2, O=WoSign CA Limited, C=CN
SerialNumber: [ 6d899f54 35b4c5af f9f08f76 a88e0d33]Certificate Extensions: 9
[1]: ObjectId: 1.3.6.1.5.5.7.1.1 Criticality=false
AuthorityInfoAccess [
[
accessMethod: ocsp
accessLocation: URIName: http://ocsp1.wosign.com/ca6/server3
,
accessMethod: caIssuers
accessLocation: URIName: http://aia1.wosign.com/ca6.server3.cer
]
]
[2]: ObjectId: 2.5.29.35 Criticality=false
AuthorityKeyIdentifier [
KeyIdentifier [
0000: F9 8B EC 04 38 6A 3F AA 06 C6 94 AD 73 95 2A B0 ....8j?.....s.*.
0010: C8 E6 B8 FB ....
]
][3]: ObjectId: 2.5.29.19 Criticality=false
BasicConstraints:[
CA:false
PathLen: undefined
][4]: ObjectId: 2.5.29.31 Criticality=false
CRLDistributionPoints [
[DistributionPoint:
[URIName: http://crls1.wosign.com/ca6-server3.crl]
]][5]: ObjectId: 2.5.29.32 Criticality=false
CertificatePolicies [
[CertificatePolicyId: [2.23.140.1.2.2]
[] ]
[CertificatePolicyId: [1.3.6.1.4.1.36305.6.3.2.1]
[PolicyQualifierInfo: [
qualifierID: 1.3.6.1.5.5.7.2.1
qualifier: 0000: 16 1D 68 74 74 70 3A 2F 2F 77 77 77 2E 77 6F 73 ..http://www.wos
0010: 69 67 6E 2E 63 6F 6D 2F 70 6F 6C 69 63 79 2F ign.com/policy/]] ]
][6]: ObjectId: 2.5.29.37 Criticality=false
ExtendedKeyUsages [
clientAuth
serverAuth
][7]: ObjectId: 2.5.29.15 Criticality=false
KeyUsage [
DigitalSignature
Key_Encipherment
][8]: ObjectId: 2.5.29.17 Criticality=false
SubjectAlternativeName [
DNSName: support.windowsazure.cn
DNSName: www.windowsazure.cn
][9]: ObjectId: 2.5.29.14 Criticality=false
SubjectKeyIdentifier [
KeyIdentifier [
0000: 17 38 7A B7 4C 12 D9 0A 36 B5 C6 70 C3 DD DE B8 .8z.L...6..p....
0010: 46 AE 86 70 F..p
]
]]
Algorithm: [SHA256withRSA]
Signature:
0000: 9B 9D DB 30 3E 69 B9 29 3C ED 98 98 AA 21 B0 DD ...0>i.)<....!..
0010: 0F AD 16 79 21 7D 7F 54 66 90 87 73 BF 1C 1A 8A ...y!..Tf..s....
0020: 4A 08 86 1A 31 AF 27 74 11 22 B5 4A 8B A0 23 4B J...1.'t.".J..#K
0030: BE 80 7D 51 35 96 D1 E9 2B 6F F6 3C AB E5 DF C8 ...Q5...+o.<....
0040: D7 B7 C4 63 D5 0E EC D8 AE 67 33 A6 C7 03 C1 51 ...c.....g3....Q
0050: F1 A5 4B 06 DC 37 B5 DB D2 B8 64 E9 E1 A3 8E C7 ..K..7....d.....
0060: B4 4A 96 D3 08 A7 E3 3D 64 61 13 24 6D 35 01 29 .J.....=da.$m5.)
0070: 64 F3 7D CE E2 56 8E 6A A2 E2 60 0D D8 D2 AD CF d....V.j..`.....
0080: FC 0E 5C 14 4B 6F F7 BE 71 1D 78 7A C7 09 5C 87 ..\.Ko..q.xz..\.
0090: 0F 38 AD 0D 94 19 E1 45 32 72 EA AB 78 4D 4C 67 .8.....E2r..xMLg
00A0: E8 4E 94 4B A7 28 35 3A 94 A6 97 CC 06 F0 68 74 .N.K.(5:......ht
00B0: 02 C0 D9 B3 4B 64 CD 7A 43 F0 8B B9 E8 CC 75 9A ....Kd.zC.....u.
00C0: 08 50 4F A1 CF 63 1D 80 7C 5A 8D 32 D1 09 B9 C3 .PO..c...Z.2....
00D0: B8 C0 B7 BE 6B 92 2B 80 B0 A4 8A 0E 19 16 41 42 ....k.+.......AB
00E0: 90 88 B4 CA E7 3B B5 F7 70 80 D7 10 37 41 DB 4D .....;..p...7A.M
00F0: 9E 2B 65 45 F1 CB 08 EA 83 1F 29 A1 E3 68 EA 9B .+eE......)..h..]
Added certificate to keystore 'jssecacerts' using alias 'www.windowsazure.cn-1'
你在程序运行的当前目录会生成一个jssecacerts文件，你可以将它放到你的jre的lib\security目录，也可以放在任意位置，然后再你的程序调用API之前指定TrustStore的位置：
System.setProperty("javax.net.ssl.trustStore","E:\\DevSpace\\jssecacerts");
我的例子如下：
各位如果对此感兴趣的话，可以来这里与我交流。
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