Java手动添加SSL证书
出现错误为 SSLHandshakeException - unable to find valid certification path to requested target
在服务器上找到对应的jssecacerts文件或cacerts, 一般在 <jre home>/lib/security 目录下, 在本地执行以下代码, 将cert添加到文件里,
再用新产生的jssecacerts放回覆盖旧文件(建议先备份)
package com.rockbb.test;/*
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import java.io.*;
import java.net.URL;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;
public class InstallCert
{
public static void main(String[] args) throws Exception
{
args = new String[]{"api.weixin.qq.com"};
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("E:\\temp\\");
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);
}
}
}
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