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/***************************************************************************
* fqterm, a terminal emulator for both BBS and *nix. *
* Copyright (C) 2008 fqterm development group. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#include <QString>
#include "fqterm_ssh_auth.h"
#include "fqterm_ssh_packet.h"
#include "fqterm_ssh_const.h"
#include "fqterm_trace.h"
namespace FQTerm {
//==============================================================================
//FQTermSSH1PasswdAuth
//==============================================================================
FQTermSSH1PasswdAuth::FQTermSSH1PasswdAuth(const char *sshuser,
const char *sshpasswd)
: FQTermSSHPasswdAuth(sshuser, sshpasswd) {
is_tried_ = false;
ssh_pw_auth_state_ = FQTermSSH1PasswdAuth::BEFORE_AUTH;
}
void FQTermSSH1PasswdAuth::initAuth(FQTermSSHPacketReceiver *packet,
FQTermSSHPacketSender *output) {
packet_receiver_ = packet;
packet_sender_ = output;
packet_receiver_->disconnect(this);
FQ_VERIFY(connect(packet_receiver_, SIGNAL(packetAvaliable(int)),
this, SLOT(handlePacket(int))));
packet_sender_->startPacket(SSH1_CMSG_USER);
user_name_.clear();
passwd_.clear();
if (!default_user_.isEmpty() && !default_passwd_.isEmpty()) {
user_name_ = default_user_;
passwd_ = default_passwd_;
}
while (user_name_.isEmpty()) {
bool isOK = false;
emit requestUserPwd(&user_name_, &passwd_, &isOK);
// SSHLoginDialog login(&d_user, &d_passwd);
if (!isOK) {
emit authError(tr("UserCancel"));
return ;
}
}
packet_sender_->putString(user_name_.toLatin1());
packet_sender_->write();
ssh_pw_auth_state_ = USER_SENT;
is_tried_ = false;
}
void FQTermSSH1PasswdAuth::handlePacket(int type) {
switch (ssh_pw_auth_state_) {
case BEFORE_AUTH:
FQ_TRACE("sshauth", 0) << "Auth: We should not be here.";
break;
case USER_SENT:
if (type == SSH1_SMSG_SUCCESS) {
ssh_pw_auth_state_ = AUTH_OK;
emit authOK();
break;
}
if (type != SSH1_SMSG_FAILURE) {
emit authError(tr("Strange response from server"));
break;
}
if (is_tried_) {
bool isOK = false;
emit requestUserPwd(&user_name_, &passwd_, &isOK);
// SSHLoginDialog login(&d_user, &d_passwd);
if (!isOK) {
emit authError(tr("User canceled"));
break;
}
is_tried_ = false;
}
packet_sender_->startPacket(SSH1_CMSG_AUTH_PASSWORD);
packet_sender_->putString(passwd_.toLatin1());
packet_sender_->write();
is_tried_ = true;
break;
case AUTH_OK:
break;
default:
return ;
}
}
//==============================================================================
//FQTermSSH2PasswdAuth
//==============================================================================
FQTermSSH2PasswdAuth::FQTermSSH2PasswdAuth(const char *sshuser,
const char *sshpasswd)
: FQTermSSHPasswdAuth(sshuser, sshpasswd) {
is_tried_ = false;
ssh_pw_auth_state_ = FQTermSSH2PasswdAuth::SERVICE_ACCEPTED;
}
void FQTermSSH2PasswdAuth::initAuth(FQTermSSHPacketReceiver *packet,
FQTermSSHPacketSender *output) {
packet_receiver_ = packet;
packet_sender_ = output;
packet_receiver_->disconnect(this);
FQ_VERIFY(connect(packet_receiver_, SIGNAL(packetAvaliable(int)),
this, SLOT(handlePacket(int))));
packet_sender_->startPacket(SSH2_MSG_SERVICE_REQUEST);
packet_sender_->putString("ssh-userauth");
packet_sender_->write();
ssh_pw_auth_state_ = FQTermSSH2PasswdAuth::SERVICE_ACCEPTED;
}
void FQTermSSH2PasswdAuth::handlePacket(int type) {
switch (ssh_pw_auth_state_) {
case FQTermSSH2PasswdAuth::SERVICE_ACCEPTED:
sendUserPasswd();
ssh_pw_auth_state_ = FQTermSSH2PasswdAuth::USER_PASSWD_SENT;
break;
case FQTermSSH2PasswdAuth::USER_PASSWD_SENT:
if (check()) {
FQ_TRACE("ssh2passwdauth", 3) << "Auth OK.";
emit authOK();
ssh_pw_auth_state_ = FQTermSSH2PasswdAuth::AUTH_OK;
}
break;
case FQTermSSH2PasswdAuth::AUTH_OK:
break;
default:
return ;
}
}
bool FQTermSSH2PasswdAuth::check() {
switch(packet_receiver_->packetType()) {
case SSH2_MSG_USERAUTH_SUCCESS:
return true;
break;
case SSH2_MSG_USERAUTH_BANNER:
// TODO: just ignore banner messages.
break;
case SSH2_MSG_USERAUTH_FAILURE:
emit authError(tr("Authentication failed!"));
break;
default:
emit authError(tr("Unexpected packet"));
}
return false;
}
void FQTermSSH2PasswdAuth::sendUserPasswd() {
if (packet_receiver_->packetType() != SSH2_MSG_SERVICE_ACCEPT) {
emit authError(tr("Expect a SSH2_MSG_SERVICE_ACCEPT packet"));
return;
}
u_char *service_name = (u_char *)packet_receiver_->getString();
if (std::string((char *)service_name) != std::string("ssh-userauth")) {
emit authError(tr("Error when sending username and password."));
return;
}
delete[] service_name;
// byte SSH_MSG_USERAUTH_REQUEST
// string user name in ISO-10646 UTF-8 encoding [RFC3629]
// string service name in US-ASCII
// string method name in US-ASCII
// .... method specific fields
user_name_.clear();
passwd_.clear();
if (!default_user_.isEmpty() && !default_passwd_.isEmpty()) {
user_name_ = default_user_;
passwd_ = default_passwd_;
}
while (user_name_.isEmpty()) {
bool isOK = false;
emit requestUserPwd(&user_name_, &passwd_, &isOK);
if (!isOK) {
emit authError(tr("UserCancel"));
return ;
}
}
packet_sender_->startPacket(SSH2_MSG_USERAUTH_REQUEST);
packet_sender_->putString(user_name_.toLatin1());
packet_sender_->putString("ssh-connection");
packet_sender_->putString("password");
packet_sender_->putByte(false);
packet_sender_->putString(passwd_.toLatin1());
packet_sender_->write();
}
} // namespace FQTerm
#include <fqterm_ssh_auth.moc>
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