OPENSSL_IA32CAP_P_MAX_CHAR_SIZE
static WCHAR value[OPENSSL_IA32CAP_P_MAX_CHAR_SIZE];
DWORD len = GetEnvironmentVariableW(L"OPENSSL_ia32cap", value, OPENSSL_IA32CAP_P_MAX_CHAR_SIZE);
return (len > 0 && len < OPENSSL_IA32CAP_P_MAX_CHAR_SIZE) ? value : NULL;