我今天从Java 1.6升级到Java 1.7。
从那时起,当我试图通过SSL建立连接到我的web服务器时,出现了一个错误:
javax.net.ssl.SSLProtocolException: handshake alert: unrecognized_name
at sun.security.ssl.ClientHandshaker.handshakeAlert(ClientHandshaker.java:1288)
at sun.security.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1904)
at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1027)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1262)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1289)
at sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1273)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:523)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:185)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1296)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)
at java.net.URL.openStream(URL.java:1035)
代码如下:
SAXBuilder builder = new SAXBuilder();
Document document = null;
try {
url = new URL(https://some url);
document = (Document) builder.build(url.openStream());
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(DownloadLoadiciousComputer.class.getName()).log(Level.SEVERE, null, ex);
}
这只是一个测试项目,这就是为什么我允许和使用不受信任的证书的代码:
TrustManager[] trustAllCerts = new TrustManager[]{
new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return null;
}
public void checkClientTrusted(
java.security.cert.X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(
java.security.cert.X509Certificate[] certs, String authType) {
}
}
};
try {
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new java.security.SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
} catch (Exception e) {
Logger.getLogger(DownloadManager.class.getName()).log(Level.SEVERE, null, e);
}
我成功地连接到了https://google.com。
我的错在哪里?
谢谢。
我觉得我也有同样的问题。
我发现我需要调整Apache配置,以包括主机的ServerName或ServerAlias。
这个代码失败了:
public class a {
public static void main(String [] a) throws Exception {
java.net.URLConnection c = new java.net.URL("https://mydomain.com/").openConnection();
c.setDoOutput(true);
c.getOutputStream();
}
}
这段代码起作用了:
public class a {
public static void main(String [] a) throws Exception {
java.net.URLConnection c = new java.net.URL("https://google.com/").openConnection();
c.setDoOutput(true);
c.getOutputStream();
}
}
Wireshark在发送TSL/SSL Hello时发现该警告
警报(级别:警告,描述:无法识别的名称),服务器你好
正在从服务器发送到客户端。
这只是一个警告,然而,Java 7.1随后立即回复了一个“致命的,描述:意外消息”,我认为这意味着Java SSL库不喜欢看到无法识别的名称的警告。
来自关于传输层安全(TLS)的Wiki:
无法识别的名称警告仅TLS;client的Server Name Indicator指定了一个服务器不支持的主机名
这让我查看了Apache配置文件,我发现如果我为从客户端/java端发送的名称添加了ServerName或ServerAlias,它可以正常工作,没有任何错误。
<VirtualHost mydomain.com:443>
ServerName mydomain.com
ServerAlias www.mydomain.com
Java 7引入了默认启用的SNI支持。我发现某些错误配置的服务器在SSL握手中发送一个“无法识别的名称”警告,大多数客户端都会忽略这个警告…除了Java。正如bob Kerns提到的,Oracle工程师拒绝“修复”这个bug/特性。
作为解决方案,他们建议设置jsse。enableSNIExtension财产。为了让你的程序在不重新编译的情况下工作,运行你的应用程序:
java -Djsse.enableSNIExtension=false yourClass
该属性也可以在Java代码中设置,但必须在任何SSL操作之前设置。加载SSL库后,您可以更改属性,但它不会对SNI状态产生任何影响。要在运行时禁用SNI(具有上述限制),请使用:
System.setProperty("jsse.enableSNIExtension", "false");
设置这个标志的缺点是SNI在应用程序中无处不在。为了使用SNI并且仍然支持错误配置的服务器:
Create a SSLSocket with the host name you want to connect to. Let's name this sslsock.
Try to run sslsock.startHandshake(). This will block until it is done or throw an exception on error. Whenever an error occurred in startHandshake(), get the exception message. If it equals to handshake alert: unrecognized_name, then you have found a misconfigured server.
When you have received the unrecognized_name warning (fatal in Java), retry opening a SSLSocket, but this time without a host name. This effectively disables SNI (after all, the SNI extension is about adding a host name to the ClientHello message).
对于Webscarab SSL代理,此提交实现了回退设置。
它应该是有用的。在Apache HttpClient 4.4中重试SNI错误-我们提出的最简单的方法(参见HttpClient -1522):
public class SniHttpClientConnectionOperator extends DefaultHttpClientConnectionOperator {
public SniHttpClientConnectionOperator(Lookup<ConnectionSocketFactory> socketFactoryRegistry) {
super(socketFactoryRegistry, null, null);
}
@Override
public void connect(
final ManagedHttpClientConnection conn,
final HttpHost host,
final InetSocketAddress localAddress,
final int connectTimeout,
final SocketConfig socketConfig,
final HttpContext context) throws IOException {
try {
super.connect(conn, host, localAddress, connectTimeout, socketConfig, context);
} catch (SSLProtocolException e) {
Boolean enableSniValue = (Boolean) context.getAttribute(SniSSLSocketFactory.ENABLE_SNI);
boolean enableSni = enableSniValue == null || enableSniValue;
if (enableSni && e.getMessage() != null && e.getMessage().equals("handshake alert: unrecognized_name")) {
TimesLoggers.httpworker.warn("Server received saw wrong SNI host, retrying without SNI");
context.setAttribute(SniSSLSocketFactory.ENABLE_SNI, false);
super.connect(conn, host, localAddress, connectTimeout, socketConfig, context);
} else {
throw e;
}
}
}
}
and
public class SniSSLSocketFactory extends SSLConnectionSocketFactory {
public static final String ENABLE_SNI = "__enable_sni__";
/*
* Implement any constructor you need for your particular application -
* SSLConnectionSocketFactory has many variants
*/
public SniSSLSocketFactory(final SSLContext sslContext, final HostnameVerifier verifier) {
super(sslContext, verifier);
}
@Override
public Socket createLayeredSocket(
final Socket socket,
final String target,
final int port,
final HttpContext context) throws IOException {
Boolean enableSniValue = (Boolean) context.getAttribute(ENABLE_SNI);
boolean enableSni = enableSniValue == null || enableSniValue;
return super.createLayeredSocket(socket, enableSni ? target : "", port, context);
}
}
and
cm = new PoolingHttpClientConnectionManager(new SniHttpClientConnectionOperator(socketFactoryRegistry), null, -1, TimeUnit.MILLISECONDS);
在这里加上一个解。这可能对LAMP用户有所帮助
Options +FollowSymLinks -SymLinksIfOwnerMatch
虚拟主机配置中的上述行是罪魁祸首。
虚拟主机配置错误时
<VirtualHost *:80>
DocumentRoot /var/www/html/load/web
ServerName dev.load.com
<Directory "/var/www/html/load/web">
Options +FollowSymLinks -SymLinksIfOwnerMatch
AllowOverride All
Require all granted
Order Allow,Deny
Allow from All
</Directory>
RewriteEngine on
RewriteCond %{SERVER_PORT} !^443$
RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]
</VirtualHost>
配置工作
<VirtualHost *:80>
DocumentRoot /var/www/html/load/web
ServerName dev.load.com
<Directory "/var/www/html/load/web">
AllowOverride All
Options All
Order Allow,Deny
Allow from All
</Directory>
# To allow authorization header
RewriteEngine On
RewriteCond %{HTTP:Authorization} ^(.*)
RewriteRule .* - [e=HTTP_AUTHORIZATION:%1]
# RewriteCond %{SERVER_PORT} !^443$
# RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R=301,L]
</VirtualHost>
如果您正在使用Resttemplate构建客户端,您只能像这样设置端点:https://IP/path_to_service并设置requestFactory。
使用这个解决方案,您不需要重新启动TOMCAT或Apache:
public static HttpComponentsClientHttpRequestFactory requestFactory(CloseableHttpClient httpClient) {
TrustStrategy acceptingTrustStrategy = new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] chain, String authType) throws CertificateException {
return true;
}
};
SSLContext sslContext = null;
try {
sslContext = org.apache.http.ssl.SSLContexts.custom()
.loadTrustMaterial(null, acceptingTrustStrategy)
.build();
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
HostnameVerifier hostnameVerifier = new HostnameVerifier() {
@Override
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
final SSLConnectionSocketFactory csf = new SSLConnectionSocketFactory(sslContext,hostnameVerifier);
final Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", new PlainConnectionSocketFactory())
.register("https", csf)
.build();
final PoolingHttpClientConnectionManager cm = new PoolingHttpClientConnectionManager(registry);
cm.setMaxTotal(100);
httpClient = HttpClients.custom()
.setSSLSocketFactory(csf)
.setConnectionManager(cm)
.build();
HttpComponentsClientHttpRequestFactory requestFactory =
new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);
return requestFactory;
}