我有一个 Java 程序连接到具有 2 路 SSL 证书身份验证的服务器。它在 Java 7 上运行良好，但在 Java 6 上失败。不幸的是，我们的系统仍在使用 Java 6。所以，我试图让它在 Java 6 上运行。
连接在 SSL 相互身份验证事务的第一步失败。那是ClientHello步骤。我们收到来自服务器的致命错误。根据我的分析，我觉得这个问题可能与不受支持的密码套件有关（即服务器不支持客户端发送的密码套件），但对此不确定。
我尝试使用System.setProperty("javax.net.debug", "ssl:handshake"); 调试问题，但调试信息指向特定问题。
我什至无法在 Java 6 中获取安全类的源代码（例如：com.sun.net.ssl.internal.ssl.* 包）来调试代码。
这是 ssl 调试日志：
*** ClientHello, TLSv1
RandomCookie: GMT: 1438890076 bytes = { 65, 109, 167, 225, 235, 81, 235, 118, 35, 88, 126, 146, 201, 181, 233, 118, 222, 126, 190, 170, 247, 232, 166, 222, 98, 157, 165, 150 }
Session ID: {}
Cipher Suites: [SSL_RSA_WITH_RC4_128_MD5, SSL_RSA_WITH_RC4_128_SHA, TLS_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_DSS_WITH_AES_128_CBC_SHA, TLS_DHE_DSS_WITH_AES_256_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_RSA_WITH_3DES_EDE_CBC_SHA, SSL_DHE_DSS_WITH_3DES_EDE_CBC_SHA, SSL_RSA_WITH_DES_CBC_SHA, SSL_DHE_RSA_WITH_DES_CBC_SHA, SSL_DHE_DSS_WITH_DES_CBC_SHA, SSL_RSA_EXPORT_WITH_RC4_40_MD5, SSL_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_RSA_EXPORT_WITH_DES40_CBC_SHA, SSL_DHE_DSS_EXPORT_WITH_DES40_CBC_SHA, TLS_EMPTY_RENEGOTIATION_INFO_SCSV]
Compression Methods: { 0 }
***
main, WRITE: TLSv1 Handshake, length = 81
main, WRITE: SSLv2 client hello message, length = 110
main, READ: TLSv1 Alert, length = 2
main, RECV TLSv1 ALERT: fatal, handshake_failure
main, called closeSocket()
main, handling exception: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
Exception in thread "main" javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:136)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(SSLSocketImpl.java:1822)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1004)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1188)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1215)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1199)
at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:476)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:166)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1195)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:234)
at com.castlight.ws.healthfund.welsforgo.WellsForgoTester_JDK6.main(WellsForgoTester_JDK6.java:72)
如何具体解决问题？有没有办法调试 Java 6 安全代码（例如：com.sun.net.ssl.internal.ssl.* 包）？