Running sslscan against Tomcat 8.0.43 / Oracle Java 8u121 and a Tomcat server.xml containing
ciphers="HIGH:!aNULL:!RC4:!MD5:@STRENGTH" shows the strongest cipher is ECDHE-RSA-AES128-GCM-SHA256 Installing the Java unlimited strength policy files increases this to ECDHE-RSA-AES256-GCM-SHA384 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) TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 So your openssl connect line below always failed for me. Andrew From: openssl-users [mailto:openssl-users-boun...@openssl.org] On Behalf Of Pravesh Rai Sent: Saturday, June 03, 2017 22:02 To: openssl-...@openssl.org Cc: openssl-users@openssl.org Subject: [openssl-users] Problem in connecting to Java (Tomcat) server with ECDHE ciphers Hi, 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: "openssl s_client -connect a.b.c.d:<port> -msg -debug -cipher ECDHE-ECDSA-AES256-GCM-SHA384" ... read from 0x213f50 [0x21c410] (7 bytes => 7 (0x7)) 0000 - 15 03 03 00 02 02 28 ......( <<< TLS 1.2 [length 0005] 15 03 03 00 02 <<< TLS 1.2 Alert [length 0002], fatal handshake_failure 02 28 14756:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure:.\ssl\s23_clnt.c:769: ... And, such error happens, only when ECDHE ciphers are selected during the connection. Any clue on this? Thanks, PR
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