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John,

On 1/8/18 6:28 PM, john.e.gr...@wellsfargo.com.INVALID wrote:
> Chris and Mark,
>> -----Original Message----- From: Christopher Schultz
>> [mailto:ch...@christopherschultz.net] Sent: Monday, January 08,
>> 2018 5:21 PM To: users@tomcat.apache.org Subject: Re: Why will
>> Tomcat not accept EC cipher suites?
>> 
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>> 
>> Mark,
>> 
>> On 1/8/18 3:36 PM, Mark Thomas wrote:
>>> On 08/01/18 19:34, john.e.gr...@wellsfargo.com.INVALID wrote:
>>>> All,
>>>> 
>>>> I'm using Tomcat 7.0.82 and java 1.8.0_152.
>>>> 
>>>> I cannot get Tomcat to accept elliptic curve ciphers.  I've
>>>> written a small SSL socket server that uses the same
>>>> certificate as the server and deployed it on the same machine
>>>> using the same JDK.  It accepts EC ciphers just fine so I
>>>> don't think there is anything in the JDK that has disabled
>>>> them, etc.  With verbose SSL enabled, Tomcat, however,
>>>> complains about "http-bio-7114-exec-4, handling exception: 
>>>> javax.net.ssl.SSLHandshakeException: no cipher suites in
>>>> common."
>>>> 
>>>> If I omit the "ciphers" property of the connector, I get
>>>> this:
>>>> 
>>>> No available cipher suite for TLSv1 No available cipher suite
>>>> for TLSv1.1 No available cipher suite for TLSv1.2
>>>> 
>>>> If I set ciphers="ALL,"  I'm back to "no cipher suites in
>>>> common."
>>>> 
>>>> If I explicitly tell Tomcat to accept 
>>>> TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, which works with my
>> socket
>>>> server, I get "No appropriate protocol (protocol is disabled
>>>> or cipher suites are inappropriate)."
>>>> 
>>>> BTW I have an RSA cert on the server with a 2048-bit key and
>>>> signed using SHA256withRSA.
>>>> 
>>>> One of the connector configs I've tried.
>>>> 
>>>> <Connector port="7114" protocol="HTTP/1.1" SSLEnabled="true" 
>>>> maxThreads="400" maxKeepAliveRequests="100" 
>>>> keepAliveTimeout="10000" scheme="https" secure="true" 
>>>> clientAuth="true" sessionCacheSize="5" sslProtocol="TLS" 
>>>> keystoreFile="/path/to/keystore" 
>>>> keystorePass="${keystore.password}" keyAlias="test" 
>>>> truststoreFile="/path/to/cacerts" 
>>>> truststorePass="${truststore.password}" 
>>>> allowUnsafeLegacyRenegotiation="false" />
>>> 
>>> Try getting it to work without client authentication to start
>>> with.
>> 
>> +1
>> 
>>> I don't see anything that jumps out as wrong in the above.
>> 
>> Also, John, what client are you using to test?
>> 
>> - -chris
> 
> At Mark's suggestion, I disabled client auth, but it didn't make
> any difference.  The handshake fails before it even gets to that
> step.
> 
> I'm using several different clients, including HP Performance
> Center, openssl, and a couple of java clients that I wrote myself
> (one uses SSLSocket directly and one uses HttpsUrlConnection.)
> 
> Currently I'm looking at the JDK's ServerHandshaker class to make
> sure I understand the log messages.

Are you doing something mundane such as:

$ openssl s_client -connect example.com:8443 ?

I would expect that to be able to negotiate a TLS connection with a
pretty standard Tomcat with TLS enabled (and nothing in particular
specified for ciphers, protocols, etc.).

- -chris
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