https://bz.apache.org/bugzilla/show_bug.cgi?id=59081
Bug ID: 59081
Summary: Cipher ordering not working
Product: Tomcat 9
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P2
Component: Connectors
Assignee: [email protected]
Reporter: [email protected]
If I configure JSSE connector (NIO) with JSSE implementation, and explicit JSSE
ciphers list, my resulting list of enabled ciphers is ordered differently from
what I configured.
The reason for that seems to be in method SSLUtilBase.getEnabled which creates
list of enabled ciphers like this:
enabled.addAll(implemented);
enabled.retainAll(configured);
Resulting List contains intersection between configured and implemented
ciphers, but having the order of implemented ciphers, and that is not what the
user wants. I guess, it should keep the order of configured ciphers, like this:
enabled.addAll(configured);
enabled.retainAll(implemented);
Right?
The second issue with cipher ordering is that
OpenSSLCipherConfigurationParser.parse always returns:
return defaultSort(ciphers);
I am not sure what's the intention here, because defaultSort method may change
user-defined cipher order.
My cipher configuration:
[TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
TLS_DHE_RSA_WITH_AES_128_CBC_SHA, TLS_RSA_WITH_3DES_EDE_CBC_SHA]
defaultSort(ciphers) changes order to:
[TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, TLS_RSA_WITH_3DES_EDE_CBC_SHA]
And getEnabled changes order to:
[TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
SSL_RSA_WITH_3DES_EDE_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
TLS_DHE_RSA_WITH_AES_256_CBC_SHA, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA]
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