OPENSSL_strtoul
int OPENSSL_strtoul(const char *str, char **endptr, int base, unsigned long *num);
if (!OPENSSL_strtoul(commap + 1, &endptr, 0, &hs_padding))
if (!OPENSSL_strtoul(copy, &endptr, 0, &block_padding))
err = OPENSSL_strtoul(test->input, &endptr, test->base, &val);