Fix checking of negative with unsigned variables.
Check digestSz for 0 in wc_SSH_KDF() so that no possibility of dividing
by zero.
Change XMEMCPY to XMEMSET in renesas_sce_util.c.
Fix test.c to free prvTmp and pubTmp on read error.
Remove unused variables.
XFREE checks for NULL so don't check before call.
Move variable declarations to reduce scope.
* Add introspection for math build.
* Raise build error if more than one multi-precision math library used.
* Fix ESP32 to support using any multi-precision math option.
* Refactor math headers to use `wolfmath.h`
* Refactor of the opaque math variable type `MATH_INT_T` used by crypto hardware (QuickAssist, SE050, ESP32 and STM32).
* Cleanups for building with `WOLFCRYPT_ONLY` and `NO_BIG_INT`.
* Stop forcing use of fast math by default for platforms in settings.h. Note: For users that still want to use fast math (tfm.c) they will need to add USE_FAST_MATH to their build settings.
Applies To:
```
WOLFSSL_ESPWROOM32
WOLFSSL_ESPWROOM32SE
MICROCHIP_PIC32
WOLFSSL_PICOTCP_DEMO
WOLFSSL_UTASKER
WOLFSSL_NRF5x
FREERTOS_TCP
WOLFSSL_TIRTOS
EBSNET
FREESCALE_COMMON
FREESCALE_KSDK_BM
WOLFSSL_DEOS
MICRIUM
WOLFSSL_SGX
```
* wolfcrypt/test/test.{c,h}: refactor to capture and encode error retvals using WC_TEST_RET_*() macros (based on line numbers), and print line and return code in err_sys().
* wolfcrypt/test/test.h: cast back to int in WC_TEST_RET_ENC(), to fix MSVC warning.
* configure.ac: add shake128 and shake256 to enable-all and enable-all-crypto;
* wolfcrypt/benchmark/benchmark.c: fix gating for bench_shake128() from !defined(WOLFSSL_NO_SHAKE128) to defined(WOLFSSL_SHAKE128).
* wolfcrypt/test/test.h: add WC_TEST_RET_TAG_* and WC_TEST_RET_DEC_TAG(), and refactor WC_TEST_RET_{ENC,DEC}_*() macros to implement the tag mechanism;
* add render_error_message() with tag-specific rendering of error strings;
* wolfcrypt/test/test.c: smallstack refactor of shake128_test() and shake128_absorb_test();
* wolfcrypt/test/test.c: change gating around mp_test() and related routines from defined(HAVE_VALGRIND) to defined(WOLFSSL_PUBLIC_MP);
* smallstack refactor of mp_test();
* refactor a slew of WC_TEST_RET_ENC_NC associated with XFOPEN/XFREAD to be WC_TEST_RET_ENC_ERRNO, and add error detection for XFREAD (previously silently tolerating zero retvals).
* wolfcrypt/test/test.c: build mp_test() only if WOLFSSL_SP_MATH_ALL or USE_FAST_MATH (in addition to WOLFSSL_PUBLIC_MP), because many general purpose functions such as sp_mulmod() are gated out in SP builds without WOLFSSL_SP_MATH_ALL.
* wolfcrypt/test/test.c: fix array bounds flubs in shake128_test();
* don't print_fiducials() in wolfcrypt_test() header, but rather, after render_error_message() in err_sys().
* wolfcrypt/test/test.{c,h}: wrap some overlong lines, and fix an unused-variable warning in mp_test_set_is_bit().
* wolfcrypt/test/test.c: fixes for several misplaced and several missing WC_TEST_RET_ENC_EC()s.
fflush stdout after each scenario for line-buffered pipelining;
refactor csv_header_count into sym_header_printed, asym_header_printed, and pqasym_header_printed;
move SAKKE tests to precede PQ tests;
rename bench_stats_sym_check() to bench_stats_check();
add bench_stats_asym_finish_ex() accepting a "desc_extra" arg, and use it to disambiguate otherwise-homonymous SAKKE runs;
fix bench_aesecb_internal() to not check time (syscall) for every 3 blocks processed.
Ed25519 and Ed448 need to enable certs.
If no system CA certs can't be parsed,
wolfSSL_CTX_load_system_CA_certs() will fail. Don't try test if RSA and
ECC are not enabled.
Fix benchmark.c so that e is defined when WOLFSSL_BENCHMARK_ALL defined.
MAX_LENGTH_SZ is 4 and supports lengths up to 2^24 - one byte for length
and 3 bytes of length.
(new gcc compiler fix)
