RP_ECHO
"(yes/no): ", RP_ECHO);
cmd = s = read_passphrase("\r\nssh> ", RP_ECHO);
rppflags = (flags & RP_ECHO) ? RPP_ECHO_ON : RPP_ECHO_OFF;
cp = p = read_passphrase(msg, RP_ECHO);
response = read_passphrase(display_prompt, echo ? RP_ECHO : 0);