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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Running sslscan against Tomcat 8.0.43 / Oracle Java 8u121 and a Tomcat server.xml containing<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">ciphers="HIGH:!aNULL:!RC4:!MD5:@STRENGTH"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">shows the strongest cipher is<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">ECDHE-RSA-AES128-GCM-SHA256<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Installing the Java unlimited strength policy files increases this to<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">ECDHE-RSA-AES256-GCM-SHA384<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">sslscan did not report any ECDSA ciphers from tomcat even when I changed the ciphers in server.xml to include them, even though a test Java program that enumerates supported
ciphers did list (unlimited strength policy files)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">So your openssl connect line below always failed for me.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Andrew<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> openssl-users [mailto:openssl-users-bounces@openssl.org]
<b>On Behalf Of </b>Pravesh Rai<br>
<b>Sent:</b> Saturday, June 03, 2017 22:02<br>
<b>To:</b> openssl-dev@openssl.org<br>
<b>Cc:</b> openssl-users@openssl.org<br>
<b>Subject:</b> [openssl-users] Problem in connecting to Java (Tomcat) server with ECDHE ciphers<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Even though I've disabled SSLvX protocols on both - client (openssl-1.0.2k) & server (Java 1.8 with Tomcat), still getting following handshake error, while executing:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">"openssl s_client -connect a.b.c.d:<port> -msg -debug -cipher ECDHE-ECDSA-AES256-GCM-SHA384"<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">...<o:p></o:p></p>
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<p class="MsoNormal">read from 0x213f50 [0x21c410] (7 bytes => 7 (0x7))<o:p></o:p></p>
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<p class="MsoNormal">0000 - 15 03 03 00 02 02 28 ......(<o:p></o:p></p>
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<p class="MsoNormal"><<< TLS 1.2 [length 0005]<o:p></o:p></p>
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<p class="MsoNormal"> 15 03 03 00 02<o:p></o:p></p>
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<p class="MsoNormal"><<< TLS 1.2 Alert [length 0002], fatal handshake_failure<o:p></o:p></p>
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<p class="MsoNormal"> 02 28<o:p></o:p></p>
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<p class="MsoNormal">14756:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure:.\ssl\s23_clnt.c:769:<o:p></o:p></p>
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<p class="MsoNormal">...<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">And, such error happens, only when ECDHE ciphers are selected during the connection.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Any clue on this?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">PR<o:p></o:p></p>
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