20241017-wc-delete-methods

[douzzer]

refactor wolfcrypt constructors:

add delete APIs, matching recently added wc_AesNew, wc_curve25519_new, wc_ed25519_new, wc_HashNew, and wc_NewRsaKey:

• wc_AesDelete()

• wc_HashDelete()

• wc_DeleteRsaKey()

• wc_curve25519_delete()

• wc_ed25519_delete()

• remove handling in corresponding preexisting free APIs for recently added .isAllocated member -- this restores preexisting semantics;

• add WC_NO_CONSTRUCTORS gate, and auto-activate it when NO_WOLFSSL_MEMORY && WOLFSSL_NO_MALLOC (unless preempted by XMALLOC_USER or XMALLOC_OVERRIDE);

• exclude recently added .isAllocated members from wolfcrypt structs when defined(WC_NO_CONSTRUCTORS).

tested with wolfssl-multi-test.sh ... check-source-text quantum-safe-wolfssl-all-g++-latest-debug quantum-safe-wolfssl-all-cppcheck fortify-source-all-asm fortify-source-all-noasm clang-tidy-all-sp-all sanitizer-all-intelasm-c-fallback-fuzzer all-gcc-c99-asn-original cryptonly-opensslextra-gcc-c99 allcryptonly-no-malloc allcryptonly-no-malloc-no-wolf-memory allcryptonly-gcc-c89 quantum-safe-wolfssl-all-valgrind quantum-safe-wolfssl-all-smallstack-valgrind cppcheck-all-smallstack

[philljj]

This modifies the new/free logic from https://github.com/wolfSSL/wolfssl/pull/3166.

[dgarske]

@aidangarske please add documentation for these new API's. Thank you