password_callback
int password_callback(char *buf, int bufsiz, int verify, PW_CB_DATA *cb_data);
return password_callback(buf, bufsiz, verify, (PW_CB_DATA *)userdata);
if ((l = password_callback(pass, PWD_STRLEN, 0, &cb_tmp)) < 0) {
len = password_callback(password, sizeof(password) - 1, 0, &cb_tmp);
len = password_callback(password, sizeof(password) - 1, 1, &cb_tmp);
if (TEST_int_gt(password_callback(pass, sizeof(pass), 0, &cb_data), 0)