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Daniele Lacamera
89f024f660
- cmake/functions.cmake: remove duplicated BUILD_FALCON conditional block; BUILD_FALCON is now set in one place. - wolfssl/wolfcrypt/include.am: list the internal wc_falcon_*.h headers under an "if BUILD_FALCON" block so they ship in "make dist" tarballs and install when Falcon is enabled (the public falcon.h was already listed). Automake distributes both branches of the conditional, so a Falcon-disabled dist still contains them. - wc_falcon_fft_neon.c: fix strict-aliasing UB in falcon_FFT/falcon_iFFT. fpr is a word64 bit pattern; casting fpr* to double* and using vld1q_f64/vst1q_f64 accesses the store through the wrong type and can miscompile at -O2/-O3. Load/store through uint64_t (the real object type) and reinterpret the vector register to/from f64 via new FALCON_VLD/FALCON_VST macros. Verified under qemu (NEON_FFT_PASS) with fmla v.2d still emitted. - wc_falcon_sampler.c / wc_falcon_sampler.h: falcon_prng_get_u8/get_u64 have no error return, so a SHAKE256 squeeze failure previously went unnoticed and stale buffer bytes could feed the signer. Add a sticky "err" field latched on the first refill failure. - wc_falcon_sign.c: falcon_sign_core now rejects the signature when the PRNG latched an error, and falcon_do_sign_tree bounds its restart loop (FALCON_SIGN_MAX_RESTARTS) so a wedged sampler terminates instead of spinning forever. The bound is far beyond any legitimate restart count.