Hi, i checked the CipherSuites in JDK and found that in the JDK there is and mistake i think. In CipherSuite the method add set the PRF to NONE only if obsoleted less than TLSv1.2. But if the suite is forbidden / obsoleted in TLSv1.2 the check must be <= (less or equal) if i am correct.
http://grepcode.com/file_/repository.grepcode.com/java/root/jdk/openjdk/8-b132/sun/security/ssl/CipherSuite.java/?v=source /* * Use this method when there is no lower protocol limit where this * suite can be used, and the PRF is P_SHA256. That is, the * existing ciphersuites. From RFC 5246: * * All cipher suites in this document use P_SHA256. */ private static void add(String name, int id, int priority, KeyExchange keyExchange, BulkCipher cipher, boolean allowed, int obsoleted) { // If this is an obsoleted suite, then don't let the TLS 1.2 // protocol have a valid PRF value. PRF prf = P_SHA256; if (obsoleted < ProtocolVersion.TLS12.v) { prf = P_NONE; } add(name, id, priority, keyExchange, cipher, allowed, obsoleted, ProtocolVersion.LIMIT_MIN_VALUE, prf); } Gruß Thomas
