Wire the stateful hash-based signature schemes HSS/LMS (RFC 8554) and
XMSS / XMSS^MT (RFC 8391) into the X.509 cert-verification path per
RFC 9802.
asn:
- Register id-alg-hss-lms-hashsig (1.2.840.113549.1.9.16.3.17),
id-alg-xmss-hashsig (1.3.6.1.5.5.7.6.34) and id-alg-xmssmt-hashsig
(1.3.6.1.5.5.7.6.35) in oid_sum.h, asn.c and asn1_oid_sum.pl.
- Plumb the new keyOIDs through GetCertKey, SigOidMatchesKeyOid,
HashForSignature, FreeSignatureCtx and ConfirmSignature so leaf
and CA certificates parse, load and verify end-to-end.
- Rename IsSigAlgoECC -> IsSigAlgoNoParams; the function has tested
"AlgorithmIdentifier omits NULL parameters" since PQC algos were
added, and HSS/LMS + XMSS only made the original name more
misleading.
wc_lms / wc_xmss:
- Add wc_XmssKey_ImportPubRaw_ex which derives parameters from the
4-byte OID prefix at the start of the raw public key, taking an
is_xmssmt hint to disambiguate the overlapping XMSS / XMSS^MT OID
spaces.
- Extend wc_LmsKey_ImportPubRaw with the same auto-derive from
u32str(L) || lmsType || lmOtsType when key->params is NULL; this
also fixes a latent NULL-deref when the legacy precondition was
violated.
- Reject WC_*_STATE_OK in both ImportPubRaw paths so re-importing
on a private-key-loaded handle can't desync priv/pub.
- Tighten wc_XmssKey_Verify's length check to strict equality,
matching wc_LmsKey_Verify and the documented contract of using
wc_XmssKey_GetSigLen for the buffer size.
tests / fixtures:
- Bouncy Castle 1.81 fixtures in certs/lms and certs/xmss covering
every supported parameter set, plus CA->leaf chains per family
and one BC-native LMS fixture as a cross-impl interop gate.
- New api tests verify each fixture end-to-end, tamper TBS and
signature bytes, exercise the wolfCrypt-level negative paths
(NOT_COMPILED_IN, BUFFER_E, BAD_FUNC_ARG, BAD_STATE_E, OID/family
mismatch, partial-write invariants, lenient VERIFYONLY re-import,
strict sigLen check) and confirm the outer signatureAlgorithm
OID is rejected when it disagrees with the SPKI in both
XMSS<->XMSS^MT directions.
Tobias Frauenschläger