bool s_resolve_md_111()

in source/unix/openssl_platform_init.c [314:347]

• 32 lines of code
• 8 McCabe index (conditional complexity)

bool s_resolve_md_111(void *module) {
#if !defined(OPENSSL_IS_AWSLC)
    evp_md_ctx_new md_new_fn = EVP_MD_CTX_new;
    evp_md_ctx_free md_free_fn = EVP_MD_CTX_free;
    evp_md_ctx_digest_init_ex md_init_ex_fn = EVP_DigestInit_ex;
    evp_md_ctx_digest_update md_update_fn = EVP_DigestUpdate;
    evp_md_ctx_digest_final_ex md_final_ex_fn = EVP_DigestFinal_ex;

    bool has_111_symbols = md_new_fn && md_free_fn && md_init_ex_fn && md_update_fn && md_final_ex_fn;
    if (has_111_symbols) {
        AWS_LOGF_DEBUG(AWS_LS_CAL_LIBCRYPTO_RESOLVE, "found static libcrypto 1.1.1 EVP_MD symbols");
    } else {
        *(void **)(&md_new_fn) = dlsym(module, "EVP_MD_CTX_new");
        *(void **)(&md_free_fn) = dlsym(module, "EVP_MD_CTX_free");
        *(void **)(&md_init_ex_fn) = dlsym(module, "EVP_DigestInit_ex");
        *(void **)(&md_update_fn) = dlsym(module, "EVP_DigestUpdate");
        *(void **)(&md_final_ex_fn) = dlsym(module, "EVP_DigestFinal_ex");
        if (md_new_fn) {
            AWS_LOGF_DEBUG(AWS_LS_CAL_LIBCRYPTO_RESOLVE, "found dynamic libcrypto 1.1.1 EVP_MD symbols");
        }
    }

    if (md_new_fn) {
        evp_md_ctx_table.new_fn = md_new_fn;
        evp_md_ctx_table.free_fn = md_free_fn;
        evp_md_ctx_table.init_ex_fn = md_init_ex_fn;
        evp_md_ctx_table.update_fn = md_update_fn;
        evp_md_ctx_table.final_ex_fn = md_final_ex_fn;
        g_aws_openssl_evp_md_ctx_table = &evp_md_ctx_table;
        return true;
    }
#endif
    return false;
}