Add GM/T 0005-2012 randomness test

[luojia65]

GM/T 0005-2012 is a national standard in China for randomness test of commercial cryptography applications. In some regions it's required in law to use GM/T 0005 test method series to pass national standard verifications.

This pull request includes:

• Description on GM/T 0005-2012 randomness test
• Small typo fix on NIST SP 800-90B requirements section

Notes on GM/T 0005-2021: it will replace GM/T 0005-2012 on May 1, 2022 link. As the new standard version is not currently in effect, this added section describes its 2012 version which is in effect by now.

[mjosaarinen]

Hi,

Isn't the "old" GM/T 0005-2012 an RNG test, not an entropy source test? I looked at the requirements and it seemed very similar to the obsoleted 800-22 which was a test covering also pseudorandom output. Entropy sources do not need to pass 800-22 either.

Anyway, in terms of timelines, it would seem sensible to look closely at the newer standard and see if it is compatible with AIS-31 and SP 800-90B standards (the old one is not really compatible with AIS-31/PTG.2 or 90B, as it does not seem to concern entropy. just "statistical randomness"). If it is not compatible and there is still a need for ISA support, it will need a separate instruction or a CSR interface. The seed entropy source is specifically an entropy source.

Cheers,

• markku

[mjosaarinen]

GM/T 0005-2012 is obsolete.