smblib.c   [plain text]

/* UNIX SMBlib NetBIOS implementation

   Version 1.0
   SMBlib Routines

   Copyright (C) Richard Sharpe 1996
   Copyright 2006 The FreeRADIUS server project

*/

/*
   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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <freeradius-devel/ident.h>
RCSID("$Id$")

#include <ctype.h>
#include <string.h>
#include "smblib-priv.h"
#include "rfcnb.h"

#define SMBLIB_ERRNO
#define uchar unsigned char

int SMBlib_errno;
int SMBlib_SMB_Error;
SMB_State_Types SMBlib_State;

/* Initialize the SMBlib package     */

int SMB_Init()

{

  SMBlib_State = SMB_State_Started;

  signal(SIGPIPE, SIG_IGN);   /* Ignore these ... */

/* If SMBLIB_Instrument is defines, turn on the instrumentation stuff */
#ifdef SMBLIB_INSTRUMENT

  SMBlib_Instrument_Init();

#endif

  return 0;

}

int SMB_Term()

{

#ifdef SMBLIB_INSTRUMENT

  SMBlib_Instrument_Term();       /* Clean up and print results */

#endif

  return 0;

}

/* SMB_Create: Create a connection structure and return for later use */
/* We have other helper routines to set variables                     */

SMB_Handle_Type SMB_Create_Con_Handle()

{

  SMBlib_errno = SMBlibE_NotImpl;
  return(NULL);

}

int SMBlib_Set_Sock_NoDelay(SMB_Handle_Type Con_Handle, BOOL yn)

{


  if (RFCNB_Set_Sock_NoDelay(Con_Handle -> Trans_Connect, yn) < 0) {

#ifdef DEBUG
#endif

    fprintf(stderr, "Setting no-delay on TCP socket failed ...\n");

  }

  return(0);

}

/* SMB_Connect_Server: Connect to a server, but don't negotiate protocol */
/* or anything else ...                                                  */

SMB_Handle_Type SMB_Connect_Server(SMB_Handle_Type Con_Handle,
				   char *server, char *NTdomain)

{
  SMB_Handle_Type con;
  char called[80], calling[80], *address;
  int i;

  /* Get a connection structure if one does not exist */

  con = Con_Handle;

  if (Con_Handle == NULL) {

    if ((con = (struct SMB_Connect_Def *)malloc(sizeof(struct SMB_Connect_Def))) == NULL) {


      SMBlib_errno = SMBlibE_NoSpace;
      return NULL;
    }

  }

  /* Init some things ... */

  strcpy(con -> service, "");
  strcpy(con -> username, "");
  strcpy(con -> password, "");
  strcpy(con -> sock_options, "");
  strcpy(con -> address, "");
  strcpy(con -> desthost, server);
  strcpy(con -> PDomain, NTdomain);
  strcpy(con -> OSName, SMBLIB_DEFAULT_OSNAME);
  strcpy(con -> LMType, SMBLIB_DEFAULT_LMTYPE);
  con -> first_tree = con -> last_tree = NULL;

  SMB_Get_My_Name(con -> myname, sizeof(con -> myname));

  con -> port = 0;                    /* No port selected */

  /* Get some things we need for the SMB Header */

  con -> pid = getpid();
  con -> mid = con -> pid;      /* This will do for now ... */
  con -> uid = 0;               /* Until we have done a logon, no uid ... */
  con -> gid = getgid();

  /* Now connect to the remote end, but first upper case the name of the
     service we are going to call, sine some servers want it in uppercase */

  for (i=0; i < strlen(server); i++)
    called[i] = toupper(server[i]);

  called[strlen(server)] = 0;    /* Make it a string */

  for (i=0; i < strlen(con -> myname); i++)
    calling[i] = toupper(con -> myname[i]);

  calling[strlen(con -> myname)] = 0;    /* Make it a string */

  if (strcmp(con -> address, "") == 0)
    address = con -> desthost;
  else
    address = con -> address;

  con -> Trans_Connect = RFCNB_Call(called,
				    calling,
				    address, /* Protocol specific */
				    con -> port);

  /* Did we get one? */

  if (con -> Trans_Connect == NULL) {

    if (Con_Handle == NULL) {
      Con_Handle = NULL;
      free(con);
    }
    SMBlib_errno = -SMBlibE_CallFailed;
    return NULL;

  }

  return(con);

}

/* SMB_Connect: Connect to the indicated server                       */
/* If Con_Handle == NULL then create a handle and connect, otherwise  */
/* use the handle passed                                              */

static const char *SMB_Prots_Restrict[] = {"PC NETWORK PROGRAM 1.0",
					  NULL};


SMB_Handle_Type SMB_Connect(SMB_Handle_Type Con_Handle,
			    SMB_Tree_Handle *tree,
			    char *service,
			    char *username,
			    char *password)

{ SMB_Handle_Type con;
  char *host, *address;
  char temp[80], called[80], calling[80];
  int i;

  /* Get a connection structure if one does not exist */

  con = Con_Handle;

  if (Con_Handle == NULL) {

    if ((con = (struct SMB_Connect_Def *)malloc(sizeof(struct SMB_Connect_Def))) == NULL) {

      SMBlib_errno = SMBlibE_NoSpace;
      return NULL;
    }

  }

  /* Init some things ... */

  strcpy(con -> service, service);
  strcpy(con -> username, username);
  strcpy(con -> password, password);
  strcpy(con -> sock_options, "");
  strcpy(con -> address, "");
  strcpy(con -> PDomain, SMBLIB_DEFAULT_DOMAIN);
  strcpy(con -> OSName, SMBLIB_DEFAULT_OSNAME);
  strcpy(con -> LMType, SMBLIB_DEFAULT_LMTYPE);
  con -> first_tree = con -> last_tree = NULL;

  SMB_Get_My_Name(con -> myname, sizeof(con -> myname));

  con -> port = 0;                    /* No port selected */

  /* Get some things we need for the SMB Header */

  con -> pid = getpid();
  con -> mid = con -> pid;      /* This will do for now ... */
  con -> uid = 0;               /* Until we have done a logon, no uid */
  con -> gid = getgid();

  /* Now figure out the host portion of the service */

  strcpy(temp, service);
  host = strtok(temp, "/\\");     /* Separate host name portion */
  strcpy(con -> desthost, host);

  /* Now connect to the remote end, but first upper case the name of the
     service we are going to call, sine some servers want it in uppercase */

  for (i=0; i < strlen(host); i++)
    called[i] = toupper(host[i]);

  called[strlen(host)] = 0;    /* Make it a string */

  for (i=0; i < strlen(con -> myname); i++)
    calling[i] = toupper(con -> myname[i]);

  calling[strlen(con -> myname)] = 0;    /* Make it a string */

  if (strcmp(con -> address, "") == 0)
    address = con -> desthost;
  else
    address = con -> address;

  con -> Trans_Connect = RFCNB_Call(called,
				    calling,
				    address, /* Protocol specific */
				    con -> port);

  /* Did we get one? */

  if (con -> Trans_Connect == NULL) {

    if (Con_Handle == NULL) {
      free(con);
      Con_Handle = NULL;
    }
    SMBlib_errno = -SMBlibE_CallFailed;
    return NULL;

  }

  /* Now, negotiate the protocol */

  if (SMB_Negotiate(con, SMB_Prots_Restrict) < 0) {

    /* Hmmm what should we do here ... We have a connection, but could not
       negotiate ...                                                      */

    return NULL;

  }

  /* Now connect to the service ... */

  if ((*tree = SMB_TreeConnect(con, NULL, service, password, "A:")) == NULL) {

    return NULL;

  }

  return(con);

}

/* Logon to the server. That is, do a session setup if we can. We do not do */
/* Unicode yet!                                                             */

int SMB_Logon_Server(SMB_Handle_Type Con_Handle, char *UserName,
		     char *PassWord)

{
  struct RFCNB_Pkt *pkt;
  int param_len, pkt_len, pass_len;
  char *p, pword[256];

  /* First we need a packet etc ... but we need to know what protocol has  */
  /* been negotiated to figure out if we can do it and what SMB format to  */
  /* use ...                                                               */

  if (Con_Handle -> protocol < SMB_P_LanMan1) {

    SMBlib_errno = SMBlibE_ProtLow;
    return(SMBlibE_BAD);

  }

  strcpy(pword, PassWord);
  if (Con_Handle -> encrypt_passwords)
  {
    pass_len=24;
    SMBencrypt((uchar *) PassWord, (uchar *)Con_Handle -> Encrypt_Key,(uchar *)pword);
  }
  else
	pass_len=strlen(pword);


  /* Now build the correct structure */

  if (Con_Handle -> protocol < SMB_P_NT1) {

    param_len = strlen(UserName) + 1 + pass_len + 1 +
                strlen(Con_Handle -> PDomain) + 1 +
	        strlen(Con_Handle -> OSName) + 1;

    pkt_len = SMB_ssetpLM_len + param_len;

    pkt = (struct RFCNB_Pkt *)RFCNB_Alloc_Pkt(pkt_len);

    if (pkt == NULL) {

      SMBlib_errno = SMBlibE_NoSpace;
      return(SMBlibE_BAD); /* Should handle the error */

    }

    bzero(SMB_Hdr(pkt), SMB_ssetpLM_len);
    SIVAL(SMB_Hdr(pkt), SMB_hdr_idf_offset, SMB_DEF_IDF);  /* Plunk in IDF */
    *(SMB_Hdr(pkt) + SMB_hdr_com_offset) = SMBsesssetupX;
    SSVAL(SMB_Hdr(pkt), SMB_hdr_pid_offset, Con_Handle -> pid);
    SSVAL(SMB_Hdr(pkt), SMB_hdr_tid_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_hdr_mid_offset, Con_Handle -> mid);
    SSVAL(SMB_Hdr(pkt), SMB_hdr_uid_offset, Con_Handle -> uid);
    *(SMB_Hdr(pkt) + SMB_hdr_wct_offset) = 10;
    *(SMB_Hdr(pkt) + SMB_hdr_axc_offset) = 0xFF;    /* No extra command */
    SSVAL(SMB_Hdr(pkt), SMB_hdr_axo_offset, 0);

    SSVAL(SMB_Hdr(pkt), SMB_ssetpLM_mbs_offset, SMBLIB_MAX_XMIT);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpLM_mmc_offset, 2);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpLM_vcn_offset, Con_Handle -> pid);
    SIVAL(SMB_Hdr(pkt), SMB_ssetpLM_snk_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpLM_pwl_offset, pass_len + 1);
    SIVAL(SMB_Hdr(pkt), SMB_ssetpLM_res_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpLM_bcc_offset, param_len);

    /* Now copy the param strings in with the right stuff */

    p = (char *)(SMB_Hdr(pkt) + SMB_ssetpLM_buf_offset);

    /* Copy  in password, then the rest. Password has a null at end */

    memcpy(p, pword, pass_len);

    p = p + pass_len + 1;

    strcpy(p, UserName);
    p = p + strlen(UserName);
    *p = 0;

    p = p + 1;

    strcpy(p, Con_Handle -> PDomain);
    p = p + strlen(Con_Handle -> PDomain);
    *p = 0;
    p = p + 1;

    strcpy(p, Con_Handle -> OSName);
    p = p + strlen(Con_Handle -> OSName);
    *p = 0;

  }
  else {

    /* We don't admit to UNICODE support ... */

    param_len = strlen(UserName) + 1 + pass_len +
                strlen(Con_Handle -> PDomain) + 1 +
	        strlen(Con_Handle -> OSName) + 1 +
		strlen(Con_Handle -> LMType) + 1;

    pkt_len = SMB_ssetpNTLM_len + param_len;

    pkt = (struct RFCNB_Pkt *)RFCNB_Alloc_Pkt(pkt_len);

    if (pkt == NULL) {

      SMBlib_errno = SMBlibE_NoSpace;
      return(-1); /* Should handle the error */

    }

    bzero(SMB_Hdr(pkt), SMB_ssetpNTLM_len);
    SIVAL(SMB_Hdr(pkt), SMB_hdr_idf_offset, SMB_DEF_IDF);  /* Plunk in IDF */
    *(SMB_Hdr(pkt) + SMB_hdr_com_offset) = SMBsesssetupX;
    SSVAL(SMB_Hdr(pkt), SMB_hdr_pid_offset, Con_Handle -> pid);
    SSVAL(SMB_Hdr(pkt), SMB_hdr_tid_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_hdr_mid_offset, Con_Handle -> mid);
    SSVAL(SMB_Hdr(pkt), SMB_hdr_uid_offset, Con_Handle -> uid);
    *(SMB_Hdr(pkt) + SMB_hdr_wct_offset) = 13;
    *(SMB_Hdr(pkt) + SMB_hdr_axc_offset) = 0xFF;    /* No extra command */
    SSVAL(SMB_Hdr(pkt), SMB_hdr_axo_offset, 0);

    SSVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_mbs_offset, SMBLIB_MAX_XMIT);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_mmc_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_vcn_offset, 0);
    SIVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_snk_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_cipl_offset, pass_len);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_cspl_offset, 0);
    SIVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_res_offset, 0);
    SIVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_cap_offset, 0);
    SSVAL(SMB_Hdr(pkt), SMB_ssetpNTLM_bcc_offset, param_len);

    /* Now copy the param strings in with the right stuff */

    p = (char *)(SMB_Hdr(pkt) + SMB_ssetpNTLM_buf_offset);

    /* Copy  in password, then the rest. Password has no null at end */

    memcpy(p, pword, pass_len);

    p = p + pass_len;

    strcpy(p, UserName);
    p = p + strlen(UserName);
    *p = 0;

    p = p + 1;

    strcpy(p, Con_Handle -> PDomain);
    p = p + strlen(Con_Handle -> PDomain);
  *p = 0;
    p = p + 1;

    strcpy(p, Con_Handle -> OSName);
    p = p + strlen(Con_Handle -> OSName);
    *p = 0;
    p = p + 1;

    strcpy(p, Con_Handle -> LMType);
    p = p + strlen(Con_Handle -> LMType);
    *p = 0;

  }

  /* Now send it and get a response */

  if (RFCNB_Send(Con_Handle -> Trans_Connect, pkt, pkt_len) < 0){

#ifdef DEBUG
    fprintf(stderr, "Error sending SessSetupX request\n");
#endif

    RFCNB_Free_Pkt(pkt);
    SMBlib_errno = SMBlibE_SendFailed;
    return(SMBlibE_BAD);

  }

  /* Now get the response ... */

  if (RFCNB_Recv(Con_Handle -> Trans_Connect, pkt, pkt_len) < 0) {

#ifdef DEBUG
    fprintf(stderr, "Error receiving response to SessSetupAndX\n");
#endif

    RFCNB_Free_Pkt(pkt);
    SMBlib_errno = SMBlibE_RecvFailed;
    return(SMBlibE_BAD);

  }

  /* Check out the response type ... */

  if (CVAL(SMB_Hdr(pkt), SMB_hdr_rcls_offset) != SMBC_SUCCESS) {  /* Process error */

#ifdef DEBUG
    fprintf(stderr, "SMB_SessSetupAndX failed with errorclass = %i, Error Code = %i\n",
	    CVAL(SMB_Hdr(pkt), SMB_hdr_rcls_offset),
	    SVAL(SMB_Hdr(pkt), SMB_hdr_err_offset));
#endif

    SMBlib_SMB_Error = IVAL(SMB_Hdr(pkt), SMB_hdr_rcls_offset);
    RFCNB_Free_Pkt(pkt);
    SMBlib_errno = SMBlibE_Remote;
    return(SMBlibE_BAD);

  }
/** @@@ mdz: check for guest login { **/
       if (SVAL(SMB_Hdr(pkt), SMB_ssetpr_act_offset) & 0x1)
       {
               /* do we allow guest login? NO! */
               return(SMBlibE_BAD);

       }
 /** @@@ mdz: } **/


#ifdef DEBUG
  fprintf(stderr, "SessSetupAndX response. Action = %i\n",
          SVAL(SMB_Hdr(pkt), SMB_ssetpr_act_offset));
#endif

  /* Now pick up the UID for future reference ... */

  Con_Handle -> uid = SVAL(SMB_Hdr(pkt), SMB_hdr_uid_offset);
  RFCNB_Free_Pkt(pkt);

  return(0);

}


/* Disconnect from the server, and disconnect all tree connects */

int SMB_Discon(SMB_Handle_Type Con_Handle, BOOL KeepHandle)

{

  /* We just disconnect the connection for now ... */

  RFCNB_Hangup(Con_Handle -> Trans_Connect);

  if (!KeepHandle)
    free(Con_Handle);

  return(0);

}