If a SecretKeySpec with a byte array and the algorithm string "TripleDES" (or "DESede")
is passed to SecretKeyFactory.getInstance("TripleDES").generateSecret(), it throws
InvalidKeySpecException("Inappropriate key specification").

This problem also occurs for the DES algorithm. It is only a problem with the SunJCE
provider. The SunPKCS11 provider works fine.

The problem appears to be that the DES/DESede implementation of
the SecretKeyFactorySpi.engineGenerateSecret(KeySpec) method
is only looking for an instanceof DESKeySpec or DESedeKeySpec. It should also allow
SecretKeySpec with an appropriate algorithm and key size.