wolfcrypt/test/test.c: in aes_cbc_test(), use unconditional static on msg4 and verify4 to work around gcc optimizer bug (probably same bug as noted in ac11279c60).
linuxkm/Makefile, linuxkm/linuxkm-fips-hash-wrapper.sh, linuxkm/linuxkm_memory.c: refactor coreKey extraction to use ELF tools rather than WOLFCRYPT_FIPS_CORE_DYNAMIC_HASH_VALUE and user_settings.h.
linuxkm/module_hooks.c: add stack measurement for wc_RunAllCast_fips().
tests/api/test_slhdsa.c: frivolous initialization to work around a false positive -Wmaybe-uninitialized in slhdsa_der_roundtrip_one().
wolfcrypt/src/wc_slhdsa.c, wolfssl/wolfcrypt/wc_slhdsa.h:
* refactor lifecycle management for SHA-2 objects to fix a leak via wc_SlhDsaKey_CheckKey().
* add support for WC_SLHDSA_NO_ASM.
* add WOLFSSL_SLHDSA_VERIFY_ONLY gates around prototypes, to get compile-time failures for misuse.
wolfcrypt/test/test.c:
* clean up myFipsCb() and restore usability of TEST_ALWAYS_RUN_TO_END with bad FIPS hash (useful test coverage).
* add wc_RunAllCast_fips() to wolfcrypt_test().
* when WOLFSSL_KERNEL_MODE or BENCH_EMBEDDED, force on WOLFSSL_SLHDSA_VERIFY_ONLY unless WOLFSSL_SLHDSA_FORCE_FULL_TESTS is defined.
wolfssl/wolfcrypt/settings.h:
* add WC_MLKEM_NO_ASM to WOLFSSL_LINUXKM section to work around asm bug.
* remove clause in WOLFSSL_KERNEL_MODE section that forced on WOLFSSL_SLHDSA_VERIFY_ONLY.
Replace the liboqs-based pre-standardization SPHINCS+ implementation
with the native FIPS 205 SLH-DSA implementation across the
certificate / ASN.1 / X.509 layers, and add SLH-DSA-rooted test
certificates plus TLS 1.3 .conf scenarios that exercise the new
verification path. All liboqs SPHINCS+ code is removed.
This enables SLH-DSA for certificate chain authentication: CA
certificates signed with SLH-DSA, certificate signature verification
against an SLH-DSA root. TLS 1.3 entity authentication via
CertificateVerify with SLH-DSA will be added in a follow-up PR.
Follows RFC 9909 (X.509 Algorithm Identifiers for SLH-DSA) and
NIST FIPS 205. Supports both SHAKE and SHA-2 parameter families
across all twelve standardized variants.
DER codec:
- New PrivateKeyDecode, PublicKeyDecode, KeyToDer, PrivateKeyToDer,
PublicKeyToDer with RFC 9909 encoding (bare OCTET STRING containing
4*n raw bytes = SK.seed || SK.prf || PK.seed || PK.root, no nested
wrapper). OID auto-detection across all twelve SHAKE / SHA-2 variants.
- PublicKeyDecode raw-bytes fast path mirrors wc_Falcon_PublicKeyDecode
and wc_Dilithium_PublicKeyDecode so callers (notably
wolfssl_x509_make_der and ConfirmSignature, which pass the raw
BIT STRING contents stashed by StoreKey) decode correctly. Honours
the caller's *inOutIdx start offset.
- Error paths in Private/PublicKeyDecode preserve params/flags/
inOutIdx and only ForceZero the buffer half each helper actually
writes; skip the wipe entirely on BAD_LENGTH_E (no bytes touched).
- ImportPublic uses |= on flags so a Private-then-Public import
sequence retains FLAG_PRIVATE.
OID dispatch:
- 12 standardized NIST OIDs (6 SHAKE + 6 SHA-2) per RFC 9909. The
pre-standardization OID-collision mechanism is removed since NIST
OIDs do not collide.
- wc_SlhDsaOidToParam / wc_SlhDsaOidToCertType return NOT_COMPILED_IN
(rather than -1) for recognised SLH-DSA OIDs whose parameter set
isn't built; wc_IsSlhDsaOid recognises both. The x509 dispatch
surfaces this as a precise diagnostic instead of the generic
"No public key found".
- wc_GetKeyOID picks a placeholder parameter from whatever variant is
compiled in and #errors at compile time if none is.
- asn_orig.c EncodeCert / EncodeCertReq accept SHA-2 SLH-DSA keyTypes
alongside SHAKE.
Tests and fixtures:
- Test cert chain in certs/slhdsa/: SLH-DSA-SHAKE-128s and
SLH-DSA-SHA2-128s self-signed roots that sign reused ML-DSA-44
entity keys (server + client), plus the gen script
(gen-slhdsa-mldsa-certs.sh, OpenSSL >= 3.5).
- New TLS 1.3 .conf scenarios under tests/suites.c dispatch:
test-tls13-slhdsa-shake.conf, test-tls13-slhdsa-sha2.conf, and a
wrong-CA negative test test-tls13-slhdsa-fail.conf.
- DER round-trip and on-disk decode tests; bench_slhdsa_*_key.der
fixtures regenerated with wolfSSL's own encoder so the codec is
pinned to RFC 9909.
- New unit test test_wc_slhdsa_x509_i2d_roundtrip exercises the raw
PublicKeyDecode entry point that wolfssl_x509_make_der relies on.
- test_wc_slhdsa_check_key now tests both Public-then-Private and
Private-then-Public import orderings.
Build / ABI:
- DYNAMIC_TYPE_SPHINCS = 98 kept as RESERVED with a tombstone comment
for ABI stability; new code should use DYNAMIC_TYPE_SLHDSA (107).
- All build system / IDE project files updated; SPHINCS+ sources,
headers, and test data removed.
- Dead bench_slhdsa_*_key arrays removed from gencertbuf.pl and
certs_test.h; the .der files on disk drive the decode tests.
wolfssl/wolfcrypt/wc_slhdsa.h: implement WOLFSSL_SLHDSA_NO_SHAKE and WOLFSSL_SLHDSA_NO_SHA2, and fix WC_SLHDSA_MAX_SIG_LEN setup to reflect SHA2 variants;
wolfssl/wolfcrypt/settings.h: if WOLFSSL_KERNEL_MODE, set WOLFSSL_SLHDSA_VERIFY_ONLY unless WOLFSSL_SLHDSA_NO_VERIFY_ONLY;
wolfcrypt/src/wc_slhdsa.c: fix WOLFSSL_SLHDSA_VERIFY_ONLY to work with --enable-slhdsa=sha2,verifyonly;
fix -Wunused-variables in slhdsakey_wots_pk_from_sig_x4();
wolfcrypt/test/test.c: in slhdsa_test(), fix gating for compatibility with --enable-slhdsa=sha2,verifyonly;
tests/api/test_slhdsa.c: fix gating in test_wc_slhdsa() and test_wc_slhdsa_sizes().
* fix aes_eax_test() for NO_MALLOC (use WC_*_VAR() to allocate eax context).
* in slhdsa_test(), gate the profusely verbose TestDumpData() clauses on WC_SLHDSA_VERBOSE_DEBUG.
.github/workflows/pq-all.yml: for the --enable-sp-math scenario, --disable-quic (QUIC unit tests fail on that combo);
wolfcrypt/test/test.c: add WC_MAYBE_UNUSED to ecdsa_test_deterministic_k_rs(), to fix armel sp-math build.
* allow for fips-dev in v7|ready|dev ENABLED_SHA256_DRBG and ENABLED_SHA512_DRBG setup and change from AC_MSG_WARN to AC_MSG_ERROR if user tries to disable outside fips-dev;
* set ENABLED_SHA512_DRBG=no in lean-aesgcm setup;
wolfcrypt/test/test.c: suppress concurrency-mt-unsafe in myFipsCb();
.wolfssl_known_macro_extras: fix lexical order.
Add SRAM PUF (Physically Unclonable Function) support to wolfCrypt. Derives device-unique cryptographic keys from the power-on state of SRAM memory using a BCH(127,64,t=10) fuzzy extractor with HKDF key derivation.
- **wolfCrypt PUF API** (`wolfcrypt/src/puf.c`, `wolfssl/wolfcrypt/puf.h`)
- `wc_PufInit`, `wc_PufReadSram`, `wc_PufEnroll`, `wc_PufReconstruct`
- `wc_PufDeriveKey` (HKDF-SHA256), `wc_PufGetIdentity` (SHA-256 device fingerprint)
- `wc_PufZeroize` (secure context cleanup)
- `wc_PufSetTestData` (synthetic SRAM for testing without hardware)
- **BCH(127,64,t=10) error-correcting codec** - corrects up to 10 bit flips per 127-bit codeword across 16 codewords
- **`WC_PUF_SHA3` build option** - select SHA3-256 instead of SHA-256 for identity hash and HKDF (default: SHA-256)
- **Precomputed GF(2^7) tables** - `const` arrays in `.rodata` (no runtime init, thread-safe, flash-resident on embedded)
- `./configure --enable-puf` (auto-enables HKDF dependency)
- CMake: `WOLFSSL_PUF=yes`
- `WOLFSSL_USER_SETTINGS`: define `WOLFSSL_PUF` and `WOLFSSL_PUF_SRAM`
- See wolfssl-examples/puf for example implementation on STM32 NUCLEO-H563ZI (Cortex-M33, STM32H563ZI)
- Supports test mode (synthetic SRAM)
- Builds to ~13KB `.elf`
- Tested on NUCLEO-H563ZI: enrollment, noisy reconstruction, key derivation all pass
- `.github/workflows/puf.yml`: host build + test workflow for PUF feature
- Doxygen API docs for all 8 public functions
- PUF group added to `doxygen_groups.h`
Tesfa Mae
David Garske
Eric Blankenhorn
Daniel Pouzzner
Paul Adelsbach
Jeremiah Mackey
JacobBarthelmeh
Tobias Frauenschläger
Andrew Hutchings
kaleb-himes
night1rider
Sean Parkinson
Brett Nicholas