Add support for:
- SM2 elliptic curve and SM2 sign/verify
- SM3 digest
- SM4 cipher with modes ECB/CBC/CTR/GCM/CCM
Add APIs for SM3 and SM4.
Add SM2 sign and verify APIs.
Add support for SM3 in wc_Hash and wc_Hmac API.
Add support for SM3 and SM4 through EVP layer.
Add support for SM2-SM3 certificates. Support key ID and name hash being
with SHA-1/256 or SM3.
Add support for TLS 1.3 cipher suites: TLS-SM4-GCM-SM3, TLS-SM4-CCM-SM3
Add support for TLS 1.2 SM cipher suite: ECDHE-ECDSA-SM4-CBC-SM3
Add support for SM3 in wc_PRF_TLS.
Add SM2-SM3 certificates and keys. Generated with GmSSL-3.0.0 and
OpenSSL.
PEM example converts PEM to DER and DER to PEM.
Supports encrypting DER and writing out as PEM.
Added better support for 40-bit RC2-CBC PBE.
Added AES-128-CBC encryption support with PKCS#5v2.
Fixed handling of iterations to support writing 24-bit values.
Declared enum types for pass to PKCS#8 encryption APIs.
Add more DER and PEM files to certs directory.
Add testing of 'pem' with pem.test script.
configure.ac: Don't use == in test.
client.c: Merge string to one line.
asn.c/asn_public.h:
fix conversion warnings/errors.
wc_Asn1_Print no longer public and doesn't need to check for NULL.
wc_Asn1_PrintAll check all pointer parameters for NULL.
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
```
* Fixed `PEM_BUFSIZE` macro redefined when building with coexist.
* Updated the `user_settings_all.h` and `user_settings_wolfboot_keytools.h` to include latest options.
* Improved API unit test error case checking where `TEST_RES_CHECK` is not used.
* Changed `TEST_SKIPPED` to unique value.
* Added CI tests for enable-all, small stack, and user setting templates.
