Support FIPS 203, 204, and 205

[xipki]

NIST is working on the standardization of the PQC mechanisms:

• FIPS 203, Module-Lattice-Based Key-Encapsulation Mechanism Standard
• FIPS 204, Module-Lattice-Based Digital Signature Standard
• FIPS 205, Stateless Hash-Based Digital Signature Standard

These Standards are still in the draft version, and only minor changes are expected.
What do you think about to assign int numbers to the public key algorithms and signature algorithms?

Below are the public key algorithms and signature algorithms:

• FIPS 203:
  • Public Key Algorithms:
    • ML-KEM-512
    • ML-KEM-768
    • ML-KEM-1024
  • Signature Algorithms: N/A
• FIPS 204
  • Here the IETF Draft specifies the key and signature syntax in PKIX: https://datatracker.ietf.org/doc/html/draft-ietf-lamps-x509-shbs-00
  • Public Key Algorithms/Signature Algorithms:
    • ML-DSA-44
    • ML-DSA-65
    • ML-DSA-87
• FIPS 204
  • Public Key Algorithms/Signature Algorithms:
    • SLH-DSA-SHA2-128s
    • SLH-DSA-SHAKE-128s
    • SLH-DSA-SHA2-128f
    • SLH-DSA-SHAKE-128f
    • SLH-DSA-SHA2-192s
    • SLH-DSA-SHAKE-192s
    • SLH-DSA-SHA2-192f
    • SLH-DSA-SHAKE-192f
    • SLH-DSA-SHA2-256s
    • SLH-DSA-SHAKE-256s
    • SLH-DSA-SHA2-256f
    • SLH-DSA-SHAKE-256f

[highlunder]

Current conclusion: relevant, but we wait for the completion of the drafts to add the numbers for the specified algorithms