The short tag length is not for general applications and their usage
comes with additional requirements such as length of input data and
lifetime of the key which SunJCE provider does not implement. Thus,
SunJCE provider limits the supported tag length to the 5 values defined
for general-purpose applications.
Regards,
Valerie
On 4/13/2017 1:58 PM, Mike Duigou wrote:
I've discovered that the Java 8 JSSE doesn't allow 64 or 32 bit tags
to be used with AES GCM. (Enforced in CipherCore) I had hoped to use
short tags per the guidance of NIST Special Publication 800-38D
Appendix C. The Javadoc for GCMParameterSpec mentions 32 and 64 bit
tags but I can't find an explanation of why small tags are not
supported by Java 8 JSSE.
Is there a reason that the short tags aren't offered?
Thanks,
Mike
