From 44388ac49531af9e2565f76ef99ff7afb757b3fb Mon Sep 17 00:00:00 2001
From: Erwin Hoffmann <feh@fehcom.de>
Date: Thu, 21 Sep 2023 17:36:16 +0200
Subject: all sources

---
 src/operator-login.cc | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/operator-login.cc

(limited to 'src/operator-login.cc')

diff --git a/src/operator-login.cc b/src/operator-login.cc
new file mode 100644
index 0000000..a0ecacd
--- /dev/null
+++ b/src/operator-login.cc
@@ -0,0 +1,134 @@
+/**  --------------------------------------------------------------------
+ *  @file operator-login.cc
+ *  @brief Implementation of the rapid LOGIN command
+ *  @author Andreas Aardal Hanssen, Erwin Hoffmann
+ *  @date 2002-2005, 2023 
+ *  -----------------------------------------------------------------  **/
+#include <unistd.h>
+#include <sys/types.h>
+#include <signal.h>
+#include <errno.h>
+
+#include <string>
+#include <iostream>
+
+#include "authenticate.h"
+#include "depot.h"
+#include "iodevice.h"
+#include "iofactory.h"
+#include "globals.h"
+#include "operators.h"
+#include "recursivedescent.h"
+#include "session.h"
+
+using namespace ::std;
+using namespace Binc;
+
+//----------------------------------------------------------------------
+LoginOperator::LoginOperator(void)
+{
+}
+
+//----------------------------------------------------------------------
+LoginOperator::~LoginOperator(void)
+{
+}
+
+//----------------------------------------------------------------------
+const string LoginOperator::getName(void) const
+{
+  return "LOGIN";
+}
+
+//----------------------------------------------------------------------
+int LoginOperator::getState(void) const
+{
+  return Session::NONAUTHENTICATED;
+}
+
+//------------------------------------------------------------------------
+Operator::ProcessResult LoginOperator::process(Depot &depot,
+                                               Request &command)
+{
+  Session &session = Session::getInstance();
+
+  if (!session.command.ssl 
+      && !session.hasEnv("ALLOW_NONSSL_PLAINTEXT_LOGINS")) {
+    session.setLastError("Plain text password authentication is disallowd. "
+                         "Please enable StartTLS or TLS in your mail client.");
+    return NO;
+  }
+
+  session.setEnv("BINCIMAP_LOGIN", "LOGIN+" + command.getTag());
+  string challenge;
+
+  switch (authenticate(depot, command.getUserID(), command.getPassword(), challenge)) {
+  case 1: 
+    session.setLastError("An internal error occurred when you attempted "
+                         "to log in to the IMAP server. Please contact "
+                         "your system administrator.");
+    return NO;
+  case 2:
+    session.setLastError("Login failed. Either your user name "
+                         "or your password was wrong. Please try again, "
+                         "and if the problem persists, please contact "
+                         "your system administrator.");
+    return NO;
+  case 3:
+    bincClient << "* BYE Timeout after " << IDLE_TIMEOUT
+               << " seconds of inactivity." << endl;
+    break;
+  case -1:
+    bincClient << "* BYE The server died unexpectedly. Please contact "
+                  "your system administrator for more information." << endl;
+    break;
+  }
+
+  // go to logout
+  session.setState(Session::LOGOUT);
+
+  return NOTHING;
+}
+
+//----------------------------------------------------------------------
+Operator::ParseResult LoginOperator::parse(Request &c_in) const
+{
+  Session &session = Session::getInstance();
+
+  if (c_in.getUidMode()) return REJECT;
+
+  Operator::ParseResult res;
+  if ((res = expectSPACE()) != ACCEPT) {
+    session.setLastError("Expected single SPACE after LOGIN");
+    return res;
+  }
+
+  string userid;
+  if ((res = expectAstring(userid)) != ACCEPT) {
+    session.setLastError("Expected userid after LOGIN SPACE");
+    return res;
+  }
+
+  c_in.setUserID(userid);
+  if ((res = expectSPACE()) != ACCEPT) {
+    session.setLastError("Expected SPACE after LOGIN SPACE userid");
+    return res;
+  }
+
+  string password;
+  if ((res = expectAstring(password)) != ACCEPT) {
+    session.setLastError("Expected password after LOGIN "
+                         "SPACE userid SPACE");
+    return res;
+  }
+
+  if ((res = expectCRLF()) != ACCEPT) {
+    session.setLastError("Expected CRLF after password");
+    return res;
+  }
+
+  c_in.setPassword(password);
+  c_in.setName("LOGIN");
+
+  return ACCEPT;
+}
-- 
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