Unix SMB/Netbios implementation.
Version 1.9.
Password and authentication handling
- Copyright (C) Andrew Tridgell 1992-1995
+ Copyright (C) Andrew Tridgell 1992-1998
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
/* users from session setup */
static pstring session_users="";
-/* these are kept here to keep the string_combinations function simple */
-static char this_user[100]="";
-static char this_salt[100]="";
-static char this_crypted[100]="";
+extern pstring scope;
+extern pstring global_myname;
+extern fstring global_myworkgroup;
-#ifdef SMB_PASSWD
/* Data to do lanman1/2 password challenge. */
static unsigned char saved_challenge[8];
static BOOL challenge_sent=False;
********************************************************************/
void generate_next_challenge(char *challenge)
{
- static int counter = 0;
- struct timeval tval;
- int v1,v2;
- GetTimeOfDay(&tval);
- v1 = (counter++) + getpid() + tval.tv_sec;
- v2 = (counter++) * getpid() + tval.tv_usec;
- SIVAL(challenge,0,v1);
- SIVAL(challenge,4,v2);
- E1(challenge,"SAMBA",(char *)saved_challenge);
- memcpy(challenge,saved_challenge,8);
- challenge_sent = True;
+#if 0
+ /*
+ * Leave this ifdef'd out while we test
+ * the new crypto random number generator.
+ * JRA.
+ */
+ unsigned char buf[16];
+ static int counter = 0;
+ struct timeval tval;
+ int v1,v2;
+
+ /* get a sort-of random number */
+ GetTimeOfDay(&tval);
+ v1 = (counter++) + getpid() + tval.tv_sec;
+ v2 = (counter++) * getpid() + tval.tv_usec;
+ SIVAL(challenge,0,v1);
+ SIVAL(challenge,4,v2);
+
+ /* mash it up with md4 */
+ mdfour(buf, (unsigned char *)challenge, 8);
+#else
+ unsigned char buf[8];
+
+ generate_random_buffer(buf,8,False);
+#endif
+ memcpy(saved_challenge, buf, 8);
+ memcpy(challenge,buf,8);
+ challenge_sent = True;
}
/*******************************************************************
set the last challenge sent, usually from a password server
********************************************************************/
-BOOL set_challenge(char *challenge)
+BOOL set_challenge(unsigned char *challenge)
{
memcpy(saved_challenge,challenge,8);
challenge_sent = True;
/*******************************************************************
get the last challenge sent
********************************************************************/
-BOOL last_challenge(char *challenge)
+static BOOL last_challenge(unsigned char *challenge)
{
if (!challenge_sent) return(False);
memcpy(challenge,saved_challenge,8);
return(True);
}
-#endif
/* this holds info on user ids that are already validated for this VC */
static user_struct *validated_users = NULL;
****************************************************************************/
user_struct *get_valid_user_struct(uint16 vuid)
{
- if(vuid == UID_FIELD_INVALID)
+ if (vuid == UID_FIELD_INVALID)
return NULL;
vuid -= VUID_OFFSET;
- if((vuid >= (uint16)num_validated_users) ||
- (validated_users[vuid].uid == -1) || (validated_users[vuid].gid == -1))
+ if ((vuid >= (uint16)num_validated_users) ||
+ (validated_users[vuid].uid == (uid_t)-1) || (validated_users[vuid].gid == (gid_t)-1))
return NULL;
return &validated_users[vuid];
}
void invalidate_vuid(uint16 vuid)
{
user_struct *vuser = get_valid_user_struct(vuid);
- if(vuser == 0)
- return;
-
- vuser->uid = -1;
- vuser->gid = -1;
- vuser->user_ngroups = 0;
- if(vuser->user_groups &&
- (vuser->user_groups != (gid_t *)vuser->user_igroups))
- free(vuser->user_groups);
- vuser->user_groups = NULL;
- if(vuser->user_igroups)
- free(vuser->user_igroups);
- vuser->user_igroups = NULL;
+
+ if (vuser == NULL) return;
+
+ vuser->uid = (uid_t)-1;
+ vuser->gid = (gid_t)-1;
+
+ vuser->n_sids = 0;
+
+ /* same number of igroups as groups */
+ vuser->n_groups = 0;
+
+ if (vuser->groups)
+ free((char *)vuser->groups);
+
+ if (vuser->sids)
+ free((char *)vuser->sids);
+
+ vuser->sids = NULL;
+ vuser->groups = NULL;
}
char *validated_username(uint16 vuid)
{
user_struct *vuser = get_valid_user_struct(vuid);
- if(vuser == 0)
+ if (vuser == NULL)
return 0;
return(vuser->name);
}
+
+/****************************************************************************
+Setup the groups a user belongs to.
+****************************************************************************/
+int setup_groups(char *user, uid_t uid, gid_t gid, int *p_ngroups, gid_t **p_groups)
+{
+ int i,ngroups;
+ gid_t grp = 0;
+ gid_t *groups = NULL;
+
+ if (-1 == initgroups(user,gid))
+ {
+ if (getuid() == 0)
+ {
+ DEBUG(0,("Unable to initgroups!\n"));
+ if (gid < 0 || gid > 16000 || uid < 0 || uid > 16000)
+ {
+ DEBUG(0,("This is probably a problem with the account %s\n", user));
+ }
+ }
+ return -1;
+ }
+
+ ngroups = sys_getgroups(0,&grp);
+ if (ngroups <= 0)
+ {
+ ngroups = 32;
+ }
+
+ if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL)
+ {
+ DEBUG(0,("setup_groups malloc fail !\n"));
+ return -1;
+ }
+
+ ngroups = sys_getgroups(ngroups,groups);
+
+ (*p_ngroups) = ngroups;
+ (*p_groups) = groups;
+
+ DEBUG( 3, ( "%s is in %d groups: ", user, ngroups ) );
+ for (i = 0; i < ngroups; i++ )
+ {
+ DEBUG( 3, ( "%s%d", (i ? ", " : ""), (int)groups[i] ) );
+ }
+ DEBUG( 3, ( "\n" ) );
+
+ return 0;
+}
+
+
/****************************************************************************
register a uid/name pair as being valid and that a valid password
has been given. vuid is biased by an offset. This allows us to
tell random client vuid's (normally zero) from valid vuids.
****************************************************************************/
-uint16 register_vuid(int uid,int gid, char *name,BOOL guest)
+uint16 register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, BOOL guest)
{
user_struct *vuser;
+ struct passwd *pwfile; /* for getting real name from passwd file */
+
+ /* Ensure no vuid gets registered in share level security. */
+ if(lp_security() == SEC_SHARE)
+ return UID_FIELD_INVALID;
+
+#if 0
+ /*
+ * After observing MS-Exchange services writing to a Samba share
+ * I belive this code is incorrect. Each service does its own
+ * sessionsetup_and_X for the same user, and as each service shuts
+ * down, it does a user_logoff_and_X. As we are consolidating multiple
+ * sessionsetup_and_X's onto the same vuid here, when the first service
+ * shuts down, it invalidates all the open files for the other services.
+ * Hence I am removing this code and forcing each sessionsetup_and_X
+ * to get a new vuid.
+ * Jeremy Allison. (jallison@whistle.com).
+ */
int i;
for(i = 0; i < num_validated_users; i++) {
vuser = &validated_users[i];
- if( vuser->uid == uid )
- return i; /* User already validated */
+ if ( vuser->uid == uid )
+ return (uint16)(i + VUID_OFFSET); /* User already validated */
}
+#endif
validated_users = (user_struct *)Realloc(validated_users,
sizeof(user_struct)*
if (!validated_users)
{
DEBUG(0,("Failed to realloc users struct!\n"));
+ num_validated_users = 0;
return UID_FIELD_INVALID;
}
vuser->uid = uid;
vuser->gid = gid;
vuser->guest = guest;
- strcpy(vuser->name,name);
+ fstrcpy(vuser->name,unix_name);
+ fstrcpy(vuser->requested_name,requested_name);
+
+ vuser->n_sids = 0;
+ vuser->sids = NULL;
- vuser->user_ngroups = 0;
- vuser->user_groups = NULL;
- vuser->user_igroups = NULL;
+ vuser->n_groups = 0;
+ vuser->groups = NULL;
/* Find all the groups this uid is in and store them.
Used by become_user() */
- setup_groups(name,uid,gid,
- &vuser->user_ngroups,
- &vuser->user_igroups,
- &vuser->user_groups);
+ setup_groups(unix_name,uid,gid,
+ &vuser->n_groups,
+ &vuser->groups);
- DEBUG(3,("uid %d registered to name %s\n",uid,name));
+ DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name));
+
+ DEBUG(3, ("Clearing default real name\n"));
+ fstrcpy(vuser->real_name, "<Full Name>\0");
+ if (lp_unix_realname()) {
+ if ((pwfile=getpwnam(vuser->name))!= NULL)
+ {
+ DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos));
+ fstrcpy(vuser->real_name, pwfile->pw_gecos);
+ }
+ }
return (uint16)((num_validated_users - 1) + VUID_OFFSET);
}
DEBUG(1,("Too many session users??\n"));
else
{
- strcat(session_users," ");
- strcat(session_users,suser);
+ pstrcat(session_users," ");
+ pstrcat(session_users,suser);
}
}
}
-#ifdef NO_GETSPNAM
-/* a fake shadow password routine which just fills a fake spwd struct
- * with the sp_pwdp field. (sreiz@aie.nl)
- */
-static struct spwd *getspnam(char *username) /* fake shadow password routine */
-{
- FILE *f;
- char line[1024];
- static char pw[20];
- static struct spwd static_spwd;
-
- static_spwd.sp_pwdp=0;
- if (!(f=fopen("/etc/master.passwd", "r")))
- return 0;
- while (fgets(line, 1024, f)) {
- if (!strncmp(line, username, strlen(username)) &&
- line[strlen(username)]==':') { /* found entry */
- char *p, *q;
-
- p=line+strlen(username)+1;
- if ((q=strchr(p, ':'))) {
- *q=0;
- if (q-p+1>20)
- break;
- strcpy(pw, p);
- static_spwd.sp_pwdp=pw;
- }
- break;
- }
- }
- fclose(f);
- if (static_spwd.sp_pwdp)
- return &static_spwd;
- return 0;
-}
-#endif
-
-
-#ifdef OSF1_ENH_SEC
-/****************************************************************************
-an enhanced crypt for OSF1
-****************************************************************************/
-static char *osf1_bigcrypt(char *password,char *salt1)
-{
- static char result[AUTH_MAX_PASSWD_LENGTH] = "";
- char *p1;
- char *p2=password;
- char salt[3];
- int i;
- int parts = strlen(password) / AUTH_CLEARTEXT_SEG_CHARS;
- if (strlen(password)%AUTH_CLEARTEXT_SEG_CHARS)
- parts++;
-
- StrnCpy(salt,salt1,2);
- StrnCpy(result,salt1,2);
-
- for (i=0; i<parts;i++)
- {
- p1 = crypt(p2,salt);
- strcat(result,p1+2);
- StrnCpy(salt,&result[2+i*AUTH_CIPHERTEXT_SEG_CHARS],2);
- p2 += AUTH_CLEARTEXT_SEG_CHARS;
- }
-
- return(result);
-}
-#endif
-
-
/****************************************************************************
-update the enhanced security database. Only relevant for OSF1 at the moment.
-****************************************************************************/
-static void update_protected_database( char *user, BOOL result)
+update the encrypted smbpasswd file from the plaintext username and password
+*****************************************************************************/
+static BOOL update_smbpassword_file(char *user, char *password)
{
-#ifdef OSF1_ENH_SEC
- struct pr_passwd *mypasswd;
- time_t starttime;
-
- mypasswd = getprpwnam (user);
- starttime = time (NULL);
-
- if (result)
- {
- mypasswd->ufld.fd_slogin = starttime;
- mypasswd->ufld.fd_nlogins = 0;
-
- putprpwnam(user,mypasswd);
-
- DEBUG(3,("Update protected database for Account %s after succesful connection\n",user));
- }
- else
- {
- mypasswd->ufld.fd_ulogin = starttime;
- mypasswd->ufld.fd_nlogins = mypasswd->ufld.fd_nlogins + 1;
- if ( mypasswd->ufld.fd_max_tries != 0 && mypasswd->ufld.fd_nlogins > mypasswd->ufld.fd_max_tries )
- {
- mypasswd->uflg.fg_lock = 0;
- DEBUG(3,("Account is disabled -- see Account Administrator.\n"));
+ struct smb_passwd *smbpw;
+ BOOL ret;
+
+ become_root(0);
+ smbpw = getsmbpwnam(user);
+ unbecome_root(0);
+
+ if(smbpw == NULL) {
+ DEBUG(0,("getsmbpwnam returned NULL\n"));
+ return False;
+ }
+
+ /* Here, the flag is one, because we want to ignore the
+ XXXXXXX'd out password */
+ ret = change_oem_password( smbpw, password, True);
+ if (ret == False) {
+ DEBUG(3,("change_oem_password returned False\n"));
}
- putprpwnam ( user , mypasswd );
- DEBUG(3,("Update protected database for Account %s after refusing connection\n",user));
- }
-#else
- DEBUG(6,("Updated database with %s %s\n",user,BOOLSTR(result)));
-#endif
-}
-
-
-#ifdef AFS_AUTH
-/*******************************************************************
-check on AFS authentication
-********************************************************************/
-static BOOL afs_auth(char *this_user,char *password)
-{
- long password_expires = 0;
- char *reason;
-
- /* For versions of AFS prior to 3.3, this routine has few arguments, */
- /* but since I can't find the old documentation... :-) */
- setpag();
- if (ka_UserAuthenticateGeneral(KA_USERAUTH_VERSION+KA_USERAUTH_DOSETPAG,
- this_user,
- (char *) 0, /* instance */
- (char *) 0, /* cell */
- password,
- 0, /* lifetime, default */
- &password_expires, /*days 'til it expires */
- 0, /* spare 2 */
- &reason) == 0)
- return(True);
- return(False);
-}
-#endif
-
-
-#ifdef DFS_AUTH
-
-sec_login_handle_t my_dce_sec_context;
-int dcelogin_atmost_once = 0;
-
-/*******************************************************************
-check on a DCE/DFS authentication
-********************************************************************/
-static BOOL dfs_auth(char *this_user,char *password)
-{
- error_status_t err;
- int err2;
- int prterr;
- boolean32 password_reset;
- sec_passwd_rec_t my_dce_password;
- sec_login_auth_src_t auth_src = sec_login_auth_src_network;
- unsigned char dce_errstr[dce_c_error_string_len];
-
- /*
- * We only go for a DCE login context if the given password
- * matches that stored in the local password file..
- * Assumes local passwd file is kept in sync w/ DCE RGY!
- */
-
- if (!strcmp((char *)crypt(password,this_salt),this_crypted) ||
- dcelogin_atmost_once)
- return(False);
-
- if (sec_login_setup_identity(
- (unsigned char *)this_user,
- sec_login_no_flags,
- &my_dce_sec_context,
- &err) == 0)
- {
- dce_error_inq_text(err, dce_errstr, &err2);
- DEBUG(0,("DCE Setup Identity for %s failed: %s\n",
- this_user,dce_errstr));
- return(False);
- }
-
- my_dce_password.version_number = sec_passwd_c_version_none;
- my_dce_password.pepper = NULL;
- my_dce_password.key.key_type = sec_passwd_plain;
- my_dce_password.key.tagged_union.plain = (idl_char *)password;
-
- if (sec_login_valid_and_cert_ident(my_dce_sec_context,
- &my_dce_password,
- &password_reset,
- &auth_src,
- &err) == 0 )
- {
- dce_error_inq_text(err, dce_errstr, &err2);
- DEBUG(0,("DCE Identity Validation failed for principal %s: %s\n",
- this_user,dce_errstr));
-
- return(False);
- }
-
- sec_login_set_context(my_dce_sec_context, &err);
- if (err != error_status_ok )
- {
- dce_error_inq_text(err, dce_errstr, &err2);
- DEBUG(0,("DCE login failed for principal %s, cant set context: %s\n",
- this_user,dce_errstr));
- sec_login_purge_context(my_dce_sec_context, &err);
- return(False);
- }
- else
- {
- DEBUG(0,("DCE login succeeded for principal %s on pid %d\n",
- this_user, getpid()));
- }
-
- dcelogin_atmost_once = 1;
- return (True);
-}
-
-void dfs_unlogin(void)
-{
- error_status_t err;
- int err2;
- unsigned char dce_errstr[dce_c_error_string_len];
-
- sec_login_purge_context(my_dce_sec_context, &err);
- if (err != error_status_ok )
- {
- dce_error_inq_text(err, dce_errstr, &err2);
- DEBUG(0,("DCE purge login context failed for server instance %d: %s\n",
- getpid(), dce_errstr));
- }
-}
-
-#endif
-
-#ifdef LINUX_BIGCRYPT
-/****************************************************************************
-an enhanced crypt for Linux to handle password longer than 8 characters
-****************************************************************************/
-static int linux_bigcrypt(char *password,char *salt1, char *crypted)
-{
-#define LINUX_PASSWORD_SEG_CHARS 8
- char salt[3];
- int i;
-
- StrnCpy(salt,salt1,2);
- crypted +=2;
-
- for ( i=strlen(password); i > 0; i -= LINUX_PASSWORD_SEG_CHARS) {
- char * p = crypt(password,salt) + 2;
- if(strncmp(p, crypted, LINUX_PASSWORD_SEG_CHARS) != 0)
- return(0);
- password += LINUX_PASSWORD_SEG_CHARS;
- crypted += strlen(p);
- }
-
- return(1);
+ return ret;
}
-#endif
-/****************************************************************************
-apply a function to upper/lower case combinations
-of a string and return true if one of them returns true.
-try all combinations with N uppercase letters.
-offset is the first char to try and change (start with 0)
-it assumes the string starts lowercased
-****************************************************************************/
-static BOOL string_combinations2(char *s,int offset,BOOL (*fn)(),int N)
-{
- int len = strlen(s);
- int i;
-
-#ifdef PASSWORD_LENGTH
- len = MIN(len,PASSWORD_LENGTH);
-#endif
-
- if (N <= 0 || offset >= len)
- return(fn(s));
-
- for (i=offset;i<(len-(N-1));i++)
- {
- char c = s[i];
- if (!islower(c)) continue;
- s[i] = toupper(c);
- if (string_combinations2(s,i+1,fn,N-1))
- return(True);
- s[i] = c;
- }
- return(False);
-}
-
-/****************************************************************************
-apply a function to upper/lower case combinations
-of a string and return true if one of them returns true.
-try all combinations with up to N uppercase letters.
-offset is the first char to try and change (start with 0)
-it assumes the string starts lowercased
-****************************************************************************/
-static BOOL string_combinations(char *s,BOOL (*fn)(),int N)
-{
- int n;
- for (n=1;n<=N;n++)
- if (string_combinations2(s,0,fn,n)) return(True);
- return(False);
-}
-/****************************************************************************
-core of password checking routine
-****************************************************************************/
-BOOL password_check(char *password)
-{
-#ifdef AFS_AUTH
- if (afs_auth(this_user,password)) return(True);
-#endif
-
-#ifdef DFS_AUTH
- if (dfs_auth(this_user,password)) return(True);
-#endif
-
-#ifdef PWDAUTH
- if (pwdauth(this_user,password) == 0)
- return(True);
-#endif
-
-#ifdef OSF1_ENH_SEC
- return(strcmp(osf1_bigcrypt(password,this_salt),this_crypted) == 0);
-#endif
-
-#ifdef ULTRIX_AUTH
- return (strcmp((char *)crypt16(password, this_salt ),this_crypted) == 0);
-#endif
-
-#ifdef LINUX_BIGCRYPT
- return(linux_bigcrypt(password,this_salt,this_crypted));
-#endif
-
-#ifdef NO_CRYPT
- DEBUG(1,("Warning - no crypt available\n"));
- return(False);
-#else
- return(strcmp((char *)crypt(password,this_salt),this_crypted) == 0);
-#endif
-}
-
-#ifdef SMB_PASSWD
/****************************************************************************
core of smb password checking routine.
****************************************************************************/
unsigned char p21[21];
unsigned char p24[24];
- if(part_passwd == NULL)
+ if (part_passwd == NULL)
DEBUG(10,("No password set - allowing access\n"));
/* No password set - always true ! */
- if(part_passwd == NULL)
+ if (part_passwd == NULL)
return 1;
memset(p21,'\0',21);
#endif
return (memcmp(p24, password, 24) == 0);
}
-#endif
/****************************************************************************
-check if a username/password is OK
+ Do a specific test for an smb password being correct, given a smb_password and
+ the lanman and NT responses.
****************************************************************************/
-BOOL password_ok(char *user,char *password, int pwlen, struct passwd *pwd)
-{
- pstring pass2;
- int level = lp_passwordlevel();
- struct passwd *pass;
-#ifdef SMB_PASSWD
- char challenge[8];
- struct smb_passwd *smb_pass;
- BOOL challenge_done = False;
-#endif
-
- if (password) password[pwlen] = 0;
-
-#ifdef SMB_PASSWD
- if (pwlen == 24)
- challenge_done = last_challenge(challenge);
-#endif
-
-#if DEBUG_PASSWORD
-#ifdef SMB_PASSWD
- if (challenge_done)
- {
- int i;
- DEBUG(100,("checking user=[%s] pass=[",user));
- for( i = 0; i < 24; i++)
- DEBUG(100,("%0x ", (unsigned char)password[i]));
- DEBUG(100,("]\n"));
- }
- else
-#endif
- DEBUG(100,("checking user=[%s] pass=[%s]\n",user,password));
-#endif
-
- if (!password)
- return(False);
- if (((!*password) || (!pwlen)) && !lp_null_passwords())
- return(False);
-
- if (pwd && !user)
- {
- pass = (struct passwd *) pwd;
- user = pass->pw_name;
- }
- else
- pass = Get_Pwnam(user,True);
-
-#ifdef SMB_PASSWD
+BOOL smb_password_ok(struct smb_passwd *smb_pass,
+ uchar lm_pass[24], uchar nt_pass[24])
+{
+ uchar challenge[8];
- DEBUG(4,("SMB Password - pwlen = %d, challenge_done = %d\n", pwlen, challenge_done));
+ if (!lm_pass || !smb_pass) return(False);
- if((pwlen == 24) && challenge_done)
- {
- DEBUG(4,("Checking SMB password for user %s (l=24)\n",user));
+ DEBUG(4,("Checking SMB password for user %s\n",
+ smb_pass->smb_name));
- if (!pass)
- {
- DEBUG(3,("Couldn't find user %s\n",user));
- return(False);
+ if(smb_pass->acct_ctrl & ACB_DISABLED) {
+ DEBUG(3,("account for user %s was disabled.\n",
+ smb_pass->smb_name));
+ return(False);
}
- smb_pass = get_smbpwnam(user);
- if(!smb_pass)
- {
- DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
- return(False);
- }
-
- /* Ensure the uid's match */
- if(smb_pass->smb_userid != pass->pw_uid)
- {
- DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
- return(False);
+ if (!last_challenge(challenge)) {
+ DEBUG(1,("no challenge done - password failed\n"));
+ return False;
}
- if(Protocol >= PROTOCOL_NT1)
- {
+ if ((Protocol >= PROTOCOL_NT1) && (smb_pass->smb_nt_passwd != NULL)) {
/* We have the NT MD4 hash challenge available - see if we can
use it (ie. does it exist in the smbpasswd file).
*/
- if(smb_pass->smb_nt_passwd != NULL)
- {
- DEBUG(4,("Checking NT MD4 password\n"));
- if(smb_password_check(password,
- smb_pass->smb_nt_passwd,
- (char *)challenge))
- {
- update_protected_database(user,True);
- return(True);
- }
- DEBUG(4,("NT MD4 password check failed\n"));
+ DEBUG(4,("smb_password_ok: Checking NT MD4 password\n"));
+ if (smb_password_check((char *)nt_pass,
+ (uchar *)smb_pass->smb_nt_passwd,
+ challenge)) {
+ DEBUG(4,("NT MD4 password check succeeded\n"));
+ return(True);
}
+ DEBUG(4,("NT MD4 password check failed\n"));
}
- /* Try against the lanman password */
+ /* Try against the lanman password. smb_pass->smb_passwd == NULL means
+ no password, allow access. */
- if (smb_password_check(password,
- smb_pass->smb_passwd,
- (char *)challenge)) {
- update_protected_database(user,True);
- return(True);
- }
-
- DEBUG(3,("Error smb_password_check failed\n"));
- }
-#endif
+ DEBUG(4,("Checking LM MD4 password\n"));
- DEBUG(4,("Checking password for user %s (l=%d)\n",user,pwlen));
+ if((smb_pass->smb_passwd == NULL) &&
+ (smb_pass->acct_ctrl & ACB_PWNOTREQ)) {
+ DEBUG(4,("no password required for user %s\n",
+ smb_pass->smb_name));
+ return True;
+ }
- if (!pass)
- {
- DEBUG(3,("Couldn't find user %s\n",user));
- return(False);
- }
+ if((smb_pass->smb_passwd != NULL) &&
+ smb_password_check((char *)lm_pass,
+ (uchar *)smb_pass->smb_passwd, challenge)) {
+ DEBUG(4,("LM MD4 password check succeeded\n"));
+ return(True);
+ }
-#ifdef SHADOW_PWD
- {
- struct spwd *spass;
+ DEBUG(4,("LM MD4 password check failed\n"));
- /* many shadow systems require you to be root to get the password,
- in most cases this should already be the case when this
- function is called, except perhaps for IPC password changing
- requests */
+ return False;
+}
- spass = getspnam(pass->pw_name);
- if (spass && spass->sp_pwdp)
- pass->pw_passwd = spass->sp_pwdp;
- }
-#endif
-#ifdef SecureWare
- {
- struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
- if (pr_pw && pr_pw->ufld.fd_encrypt)
- pass->pw_passwd = pr_pw->ufld.fd_encrypt;
- }
-#endif
+/****************************************************************************
+check if a username/password is OK assuming the password is a 24 byte
+SMB hash
+return True if the password is correct, False otherwise
+****************************************************************************/
+BOOL pass_check_smb(char *user, char *domain,
+ char *challenge, char *lm_pwd, char *nt_pwd,
+ struct passwd *pwd)
+{
+ struct passwd *pass;
+ struct smb_passwd *smb_pass;
-#ifdef HPUX_10_TRUSTED
- {
- struct pr_passwd *pr_pw = getprpwnam(pass->pw_name);
- if (pr_pw && pr_pw->ufld.fd_encrypt)
- pass->pw_passwd = pr_pw->ufld.fd_encrypt;
- }
-#endif
+ if (!lm_pwd || !nt_pwd)
+ {
+ return(False);
+ }
-#ifdef OSF1_ENH_SEC
- {
- struct pr_passwd *mypasswd;
- DEBUG(5,("Checking password for user %s in OSF1_ENH_SEC\n",user));
- mypasswd = getprpwnam (user);
- if ( mypasswd )
- {
- strcpy(pass->pw_name,mypasswd->ufld.fd_name);
- strcpy(pass->pw_passwd,mypasswd->ufld.fd_encrypt);
- }
- else
- {
- DEBUG(5,("No entry for user %s in protected database !\n",user));
- return(False);
- }
- }
-#endif
+ if (pwd != NULL && user == NULL)
+ {
+ pass = (struct passwd *) pwd;
+ user = pass->pw_name;
+ }
+ else
+ {
+ pass = Get_Pwnam(user,True);
+ }
-#ifdef ULTRIX_AUTH
- {
- AUTHORIZATION *ap = getauthuid( pass->pw_uid );
- if (ap)
- {
- strcpy( pass->pw_passwd, ap->a_password );
- endauthent();
- }
- }
-#endif
+ if (pass == NULL)
+ {
+ DEBUG(3,("Couldn't find user %s\n",user));
+ return(False);
+ }
- /* extract relevant info */
- strcpy(this_user,pass->pw_name);
- strcpy(this_salt,pass->pw_passwd);
- strcpy(this_crypted,pass->pw_passwd);
-
- if (!*this_crypted) {
- if (!lp_null_passwords()) {
- DEBUG(2,("Disallowing access to %s due to null password\n",this_user));
- return(False);
- }
-#ifndef PWDAUTH
- if (!*password) {
- DEBUG(3,("Allowing access to %s with null password\n",this_user));
- return(True);
- }
-#endif
- }
+ smb_pass = getsmbpwnam(user);
- /* try it as it came to us */
- if (password_check(password))
- {
- update_protected_database(user,True);
- return(True);
- }
+ if (smb_pass == NULL)
+ {
+ DEBUG(3,("Couldn't find user %s in smb_passwd file.\n", user));
+ return(False);
+ }
- /* if the password was given to us with mixed case then we don't
- need to proceed as we know it hasn't been case modified by the
- client */
- if (strhasupper(password) && strhaslower(password))
- return(False);
+ /* Quit if the account was disabled. */
+ if(smb_pass->acct_ctrl & ACB_DISABLED) {
+ DEBUG(3,("account for user %s was disabled.\n", user));
+ return(False);
+ }
- /* make a copy of it */
- StrnCpy(pass2,password,sizeof(pstring)-1);
-
- /* try all lowercase */
- strlower(password);
- if (password_check(password))
- {
- update_protected_database(user,True);
- return(True);
- }
+ /* Ensure the uid's match */
+ if (smb_pass->smb_userid != pass->pw_uid)
+ {
+ DEBUG(3,("Error : UNIX and SMB uids in password files do not match !\n"));
+ return(False);
+ }
- /* give up? */
- if(level < 1)
- {
- update_protected_database(user,False);
+ if (lm_pwd[0] == '\0' && IS_BITS_SET_ALL(smb_pass->acct_ctrl, ACB_PWNOTREQ) && lp_null_passwords())
+ {
+ DEBUG(3,("account for user %s has no password and null passwords are allowed.\n", smb_pass->smb_name));
+ return(True);
+ }
- /* restore it */
- strcpy(password,pass2);
+ if (smb_password_ok(smb_pass, (uchar *)lm_pwd, (uchar *)nt_pwd))
+ {
+ return(True);
+ }
+
+ DEBUG(3,("Error smb_password_check failed\n"));
+ return False;
+}
- return(False);
- }
+/****************************************************************************
+check if a username/password pair is OK either via the system password
+database or the encrypted SMB password database
+return True if the password is correct, False otherwise
+****************************************************************************/
+BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd)
+{
+ if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords()))
+ {
+ /* if 24 bytes long assume it is an encrypted password */
+ uchar challenge[8];
- /* last chance - all combinations of up to level chars upper! */
- strlower(password);
+ if (!last_challenge(challenge))
+ {
+ DEBUG(0,("Error: challenge not done for user=%s\n", user));
+ return False;
+ }
- if (string_combinations(password,password_check,level))
- {
- update_protected_database(user,True);
- return(True);
- }
+ return pass_check_smb(user, global_myworkgroup,
+ challenge, password, password, pwd);
+ }
- update_protected_database(user,False);
-
- /* restore it */
- strcpy(password,pass2);
-
- return(False);
+ return pass_check(user, password, pwlen, pwd,
+ lp_update_encrypted() ?
+ update_smbpassword_file : NULL);
}
-
-
/****************************************************************************
check if a username is valid
****************************************************************************/
BOOL user_ok(char *user,int snum)
{
- pstring valid, invalid;
- BOOL ret;
-
- StrnCpy(valid, lp_valid_users(snum), sizeof(pstring));
- StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
-
- string_sub(valid,"%S",lp_servicename(snum));
- string_sub(invalid,"%S",lp_servicename(snum));
-
- ret = !user_in_list(user,invalid);
-
- if (ret && valid && *valid)
- ret = user_in_list(user,valid);
+ pstring valid, invalid;
+ BOOL ret;
+
+ StrnCpy(valid, lp_valid_users(snum), sizeof(pstring));
+ StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring));
+
+ string_sub(valid,"%S",lp_servicename(snum));
+ string_sub(invalid,"%S",lp_servicename(snum));
+
+ ret = !user_in_list(user,invalid);
+
+ if (ret && valid && *valid) {
+ ret = user_in_list(user,valid);
+ }
- if (ret && lp_onlyuser(snum)) {
- char *user_list = lp_username(snum);
- string_sub(user_list,"%S",lp_servicename(snum));
- ret = user_in_list(user,user_list);
- }
+ if (ret && lp_onlyuser(snum)) {
+ char *user_list = lp_username(snum);
+ string_sub(user_list,"%S",lp_servicename(snum));
+ ret = user_in_list(user,user_list);
+ }
- return(ret);
+ return(ret);
}
****************************************************************************/
static char *validate_group(char *group,char *password,int pwlen,int snum)
{
-#ifdef NETGROUP
+#ifdef HAVE_NETGROUP
{
char *host, *user, *domain;
setnetgrent(group);
}
#endif
-#if HAVE_GETGRNAM
+#ifdef HAVE_GETGRNAM
{
struct group *gptr = (struct group *)getgrnam(group);
char **member;
while (member && *member)
{
static fstring name;
- strcpy(name,*member);
+ fstrcpy(name,*member);
if (user_ok(name,snum) &&
password_ok(name,password,pwlen,NULL))
return(&name[0]);
if (*(pwd->pw_passwd) && pwd->pw_gid == gptr->gr_gid) {
/* This Entry have PASSWORD and same GID then check pwd */
if (password_ok(NULL, password, pwlen, pwd)) {
- strcpy(tm, pwd->pw_name);
+ fstrcpy(tm, pwd->pw_name);
endpwent ();
return tm;
}
DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password));
#endif
- /* there are several possabilities:
+ /* there are several possibilities:
1) login as the given user with given password
2) login as a previously registered username with the given password
3) login as a session list username with the given password
if (!ok && (vuser != 0) && vuser->guest) {
if (user_ok(vuser->name,snum) &&
password_ok(vuser->name, password, pwlen, NULL)) {
- strcpy(user, vuser->name);
+ fstrcpy(user, vuser->name);
vuser->guest = False;
DEBUG(3,("ACCEPTED: given password with registered user %s\n", user));
ok = True;
/* now check the list of session users */
- if (!ok)
- {
- char *auser;
- char *user_list = strdup(session_users);
- if (!user_list) return(False);
+ if (!ok)
+ {
+ char *auser;
+ char *user_list = strdup(session_users);
+ if (!user_list) return(False);
- for (auser=strtok(user_list,LIST_SEP);
- !ok && auser;
- auser = strtok(NULL,LIST_SEP))
- {
- fstring user2;
- strcpy(user2,auser);
- if (!user_ok(user2,snum)) continue;
+ for (auser=strtok(user_list,LIST_SEP);
+ !ok && auser;
+ auser = strtok(NULL,LIST_SEP))
+ {
+ fstring user2;
+ fstrcpy(user2,auser);
+ if (!user_ok(user2,snum)) continue;
- if (password_ok(user2,password, pwlen, NULL)) {
- ok = True;
- strcpy(user,user2);
- DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
- }
- }
- free(user_list);
- }
-
- /* check for a previously validated username/password pair */
- if (!ok && !lp_revalidate(snum) &&
- (vuser != 0) && !vuser->guest &&
- user_ok(vuser->name,snum)) {
- strcpy(user,vuser->name);
- *guest = False;
- DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
- ok = True;
+ if (password_ok(user2,password, pwlen, NULL)) {
+ ok = True;
+ fstrcpy(user,user2);
+ DEBUG(3,("ACCEPTED: session list username and given password ok\n"));
+ }
}
+ free(user_list);
+ }
+
+ /* check for a previously validated username/password pair */
+ if (!ok && (!lp_revalidate(snum) || lp_security() > SEC_SHARE) &&
+ (vuser != 0) && !vuser->guest &&
+ user_ok(vuser->name,snum)) {
+ fstrcpy(user,vuser->name);
+ *guest = False;
+ DEBUG(3,("ACCEPTED: validated uid ok as non-guest\n"));
+ ok = True;
+ }
/* check for a rhosts entry */
if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) {
if (auser)
{
ok = True;
- strcpy(user,auser);
+ fstrcpy(user,auser);
DEBUG(3,("ACCEPTED: group username and given password ok\n"));
}
}
else
{
fstring user2;
- strcpy(user2,auser);
+ fstrcpy(user2,auser);
if (user_ok(user2,snum) &&
password_ok(user2,password,pwlen,NULL))
{
ok = True;
- strcpy(user,user2);
+ fstrcpy(user,user2);
DEBUG(3,("ACCEPTED: user list username and given password ok\n"));
}
}
StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1);
if (Get_Pwnam(guestname,True))
{
- strcpy(user,guestname);
+ fstrcpy(user,guestname);
ok = True;
DEBUG(3,("ACCEPTED: guest account and guest ok\n"));
}
}
file_host = strtok(bp, " \t\n");
file_user = strtok(NULL, " \t\n");
- DEBUG(7, ("check_user_equiv %s %s\n", file_host, file_user));
+ DEBUG(7, ("check_user_equiv %s %s\n", file_host ? file_host : "(null)",
+ file_user ? file_user : "(null)" ));
if (file_host && *file_host)
{
BOOL host_ok = False;
-#ifdef NETGROUP
+#if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN)
if (is_group)
{
static char *mydomain = NULL;
#else
if (is_group)
{
- DEBUG(1,("Netgroups not configured - add -DNETGROUP and recompile\n"));
+ DEBUG(1,("Netgroups not configured\n"));
continue;
}
#endif
fname = lp_hosts_equiv();
/* note: don't allow hosts.equiv on root */
- if (fname && *fname && (pass->pw_uid != 0))
- {
- if (check_user_equiv(user,client_name(),fname))
- return(True);
- }
+ if (fname && *fname && (pass->pw_uid != 0)) {
+ extern int Client;
+ if (check_user_equiv(user,client_name(Client),fname))
+ return(True);
+ }
if (lp_use_rhosts())
{
char *home = get_home_dir(user);
- if (home)
- {
- sprintf(rhostsfile, "%s/.rhosts", home);
- if (check_user_equiv(user,client_name(),rhostsfile))
- return(True);
- }
+ if (home) {
+ extern int Client;
+ slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home);
+ if (check_user_equiv(user,client_name(Client),rhostsfile))
+ return(True);
+ }
}
return(False);
}
-int password_client = -1;
-static fstring pserver;
+/****************************************************************************
+return the client state structure
+****************************************************************************/
+struct cli_state *server_client(void)
+{
+ static struct cli_state pw_cli;
+ return &pw_cli;
+}
/****************************************************************************
-attempted support for server level security
+support for server level security
****************************************************************************/
-BOOL server_cryptkey(char *buf)
+struct cli_state *server_cryptkey(void)
{
- pstring inbuf,outbuf;
- fstring pass_protocol;
- extern fstring remote_machine;
- char *p;
- int len;
- fstring desthost;
- struct in_addr dest_ip;
- int port = SMB_PORT;
- BOOL ret;
+ struct cli_state *cli;
+ fstring desthost;
+ struct in_addr dest_ip;
+ extern fstring local_machine;
+ char *p;
+ BOOL connected_ok = False;
+ struct nmb_name calling, called;
+
+ cli = server_client();
+
+ if (!cli_initialise(cli))
+ return NULL;
+
+ p = lp_passwordserver();
+ while(p && next_token( &p, desthost, LIST_SEP, sizeof(desthost))) {
+ standard_sub_basic(desthost);
+ strupper(desthost);
+
+ if(!resolve_name( desthost, &dest_ip, 0x20)) {
+ DEBUG(1,("server_cryptkey: Can't resolve address for %s\n",desthost));
+ continue;
+ }
+
+ if (ismyip(dest_ip)) {
+ DEBUG(1,("Password server loop - disabling password server %s\n",desthost));
+ continue;
+ }
- if (password_client >= 0)
- close(password_client);
- password_client = -1;
+ if (cli_connect(cli, desthost, &dest_ip)) {
+ DEBUG(3,("connected to password server %s\n",desthost));
+ connected_ok = True;
+ break;
+ }
+ }
- if (Protocol < PROTOCOL_NT1) {
- strcpy(pass_protocol,"LM1.2X002");
- } else {
- strcpy(pass_protocol,"NT LM 0.12");
- }
+ if (!connected_ok) {
+ DEBUG(0,("password server not available\n"));
+ cli_shutdown(cli);
+ return NULL;
+ }
- bzero(inbuf,sizeof(inbuf));
- bzero(outbuf,sizeof(outbuf));
+ make_nmb_name(&calling, local_machine, 0x0 , scope);
+ make_nmb_name(&called , desthost , 0x20, scope);
- for (p=strtok(lp_passwordserver(),LIST_SEP); p ; p = strtok(NULL,LIST_SEP)) {
- strcpy(desthost,p);
- standard_sub_basic(desthost);
- strupper(desthost);
+ if (!cli_session_request(cli, &calling, &called))
+ {
+ DEBUG(1,("%s rejected the session\n",desthost));
+ cli_shutdown(cli);
+ return NULL;
+ }
- dest_ip = *interpret_addr2(desthost);
- if (zero_ip(dest_ip)) {
- DEBUG(1,("Can't resolve address for %s\n",p));
- continue;
- }
+ DEBUG(3,("got session\n"));
- if (ismyip(dest_ip)) {
- DEBUG(1,("Password server loop - disabling password server %s\n",p));
- continue;
- }
+ if (!cli_negprot(cli)) {
+ DEBUG(1,("%s rejected the negprot\n",desthost));
+ cli_shutdown(cli);
+ return NULL;
+ }
- password_client = open_socket_out(SOCK_STREAM, &dest_ip, port, SHORT_CONNECT_TIMEOUT);
- if (password_client >= 0) {
- DEBUG(3,("connected to password server %s\n",p));
- StrnCpy(pserver,p,sizeof(pserver)-1);
- break;
- }
- }
+ if (cli->protocol < PROTOCOL_LANMAN2 ||
+ !(cli->sec_mode & 1)) {
+ DEBUG(1,("%s isn't in user level security mode\n",desthost));
+ cli_shutdown(cli);
+ return NULL;
+ }
- if (password_client < 0) {
- DEBUG(1,("password server not available\n"));
- return(False);
- }
+ DEBUG(3,("password server OK\n"));
+ return cli;
+}
- /* send a session request (RFC 8002) */
+/****************************************************************************
+validate a password with the password server
+****************************************************************************/
+BOOL server_validate(char *user, char *domain,
+ char *pass, int passlen,
+ char *ntpass, int ntpasslen)
+{
+ struct cli_state *cli;
+ extern fstring local_machine;
+ static unsigned char badpass[24];
+ cli = server_client();
+
+ if (!cli->initialised) {
+ DEBUG(1,("password server %s is not connected\n", cli->desthost));
+ return(False);
+ }
+
+ if(badpass[0] == 0) {
+ memset(badpass, 0x1f, sizeof(badpass));
+ }
+
+ if((passlen == sizeof(badpass)) && !memcmp(badpass, pass, passlen)) {
+ /* Very unlikely, our random bad password is the same as the users
+ password. */
+ memset(badpass, badpass[0]+1, sizeof(badpass));
+ }
+
+ /*
+ * Attempt a session setup with a totally incorrect password.
+ * If this succeeds with the guest bit *NOT* set then the password
+ * server is broken and is not correctly setting the guest bit. We
+ * need to detect this as some versions of NT4.x are broken. JRA.
+ */
+
+ if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass),
+ (char *)badpass, sizeof(badpass), domain)) {
+ if ((SVAL(cli->inbuf,smb_vwv2) & 1) == 0) {
+ DEBUG(0,("server_validate: password server %s allows users as non-guest \
+with a bad password.\n", cli->desthost));
+ DEBUG(0,("server_validate: This is broken (and insecure) behaviour. Please do not \
+use this machine as the password server.\n"));
+ cli_ulogoff(cli);
+ return False;
+ }
+ cli_ulogoff(cli);
+ }
+
+ /*
+ * Now we know the password server will correctly set the guest bit, or is
+ * not guest enabled, we can try with the real password.
+ */
+
+ if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) {
+ DEBUG(1,("password server %s rejected the password\n", cli->desthost));
+ return False;
+ }
- /* put in the destination name */
- len = 4;
- p = outbuf+len;
- name_mangle(desthost,p,' ');
- len += name_len(p);
+ /* if logged in as guest then reject */
+ if ((SVAL(cli->inbuf,smb_vwv2) & 1) != 0) {
+ DEBUG(1,("password server %s gave us guest only\n", cli->desthost));
+ cli_ulogoff(cli);
+ return(False);
+ }
- /* and my name */
- p = outbuf+len;
- name_mangle(remote_machine,p,' ');
- len += name_len(p);
+ /*
+ * This patch from Rob Nielsen <ran@adc.com> makes doing
+ * the NetWksaUserLogon a dynamic, rather than compile-time
+ * parameter, defaulting to on. This is somewhat dangerous
+ * as it allows people to turn off this neccessary check,
+ * but so many people have had problems with this that I
+ * think it is a neccessary change. JRA.
+ */
+
+ if (lp_net_wksta_user_logon()) {
+ DEBUG(3,("trying NetWkstaUserLogon with password server %s\n", cli->desthost));
+
+ if (!cli_send_tconX(cli, "IPC$", "IPC", "", 1)) {
+ DEBUG(0,("password server %s refused IPC$ connect\n", cli->desthost));
+ cli_ulogoff(cli);
+ return False;
+ }
+
+ if (!cli_NetWkstaUserLogon(cli,user,local_machine)) {
+ DEBUG(0,("password server %s failed NetWkstaUserLogon\n", cli->desthost));
+ cli_tdis(cli);
+ cli_ulogoff(cli);
+ return False;
+ }
- _smb_setlen(outbuf,len);
- CVAL(outbuf,0) = 0x81;
+ if (cli->privilages == 0) {
+ DEBUG(0,("password server %s gave guest privilages\n", cli->desthost));
+ cli_tdis(cli);
+ cli_ulogoff(cli);
+ return False;
+ }
- send_smb(password_client,outbuf);
-
-
- if (!receive_smb(password_client,inbuf,5000) ||
- CVAL(inbuf,0) != 0x82) {
- DEBUG(1,("%s rejected the session\n",pserver));
- close(password_client); password_client = -1;
- return(False);
- }
+ if (!strequal(cli->eff_name, user)) {
+ DEBUG(0,("password server %s gave different username %s\n",
+ cli->desthost,
+ cli->eff_name));
+ cli_tdis(cli);
+ cli_ulogoff(cli);
+ return False;
+ }
+ cli_tdis(cli);
+ }
+ else {
+ DEBUG(3,("skipping NetWkstaUserLogon with password server %s\n", cli->desthost));
+ }
- DEBUG(3,("got session\n"));
+ DEBUG(3,("password server %s accepted the password\n", cli->desthost));
- bzero(outbuf,smb_size);
+ cli_ulogoff(cli);
- /* setup the protocol string */
- set_message(outbuf,0,strlen(pass_protocol)+2,True);
- p = smb_buf(outbuf);
- *p++ = 2;
- strcpy(p,pass_protocol);
+ return(True);
+}
- CVAL(outbuf,smb_com) = SMBnegprot;
- CVAL(outbuf,smb_flg) = 0x8;
- SSVAL(outbuf,smb_flg2,0x1);
+/***********************************************************************
+ Do the same as security=server, but using NT Domain calls and a session
+ key from the machine password.
+************************************************************************/
- send_smb(password_client,outbuf);
- ret = receive_smb(password_client,inbuf,5000);
+BOOL domain_client_validate( char *user, char *domain,
+ char *smb_apasswd, int smb_apasslen,
+ char *smb_ntpasswd, int smb_ntpasslen)
+{
+ unsigned char local_challenge[8];
+ unsigned char local_lm_response[24];
+ unsigned char local_nt_reponse[24];
+ unsigned char trust_passwd[16];
+ fstring remote_machine;
+ char *p;
+ struct in_addr dest_ip;
+ NET_ID_INFO_CTR ctr;
+ NET_USER_INFO_3 info3;
+ struct cli_state cli;
+ uint32 smb_uid_low;
+ BOOL connected_ok = False;
+ struct nmb_name calling, called;
+
+ /*
+ * Check that the requested domain is not our own machine name.
+ * If it is, we should never check the PDC here, we use our own local
+ * password file.
+ */
- if (!ret || CVAL(inbuf,smb_rcls) || SVAL(inbuf,smb_vwv0)) {
- DEBUG(1,("%s rejected the protocol\n",pserver));
- close(password_client); password_client= -1;
- return(False);
+ if(strequal( domain, global_myname)) {
+ DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n"));
+ return False;
}
- if (!(CVAL(inbuf,smb_vwv1) & 1)) {
- DEBUG(1,("%s isn't in user level security mode\n",pserver));
- close(password_client); password_client= -1;
- return(False);
+ /*
+ * Next, check that the passwords given were encrypted.
+ */
+
+ if(((smb_apasslen != 24) && (smb_apasslen != 0)) ||
+ ((smb_ntpasslen != 24) && (smb_ntpasslen != 0))) {
+
+ /*
+ * Not encrypted - do so.
+ */
+
+ DEBUG(3,("domain_client_validate: User passwords not in encrypted format.\n"));
+ generate_random_buffer( local_challenge, 8, False);
+ SMBencrypt( (uchar *)smb_apasswd, local_challenge, local_lm_response);
+ SMBNTencrypt((uchar *)smb_ntpasswd, local_challenge, local_nt_reponse);
+ smb_apasslen = 24;
+ smb_ntpasslen = 24;
+ smb_apasswd = (char *)local_lm_response;
+ smb_ntpasswd = (char *)local_nt_reponse;
+ } else {
+
+ /*
+ * Encrypted - get the challenge we sent for these
+ * responses.
+ */
+
+ if (!last_challenge(local_challenge)) {
+ DEBUG(0,("domain_client_validate: no challenge done - password failed\n"));
+ return False;
+ }
}
- memcpy(buf,inbuf,smb_len(inbuf)+4);
+ /*
+ * Get the machine account password.
+ */
+ if (!trust_get_passwd( trust_passwd, global_myworkgroup, global_myname))
+ {
+ return False;
+ }
- DEBUG(3,("password server OK\n"));
+ /*
+ * At this point, smb_apasswd points to the lanman response to
+ * the challenge in local_challenge, and smb_ntpasswd points to
+ * the NT response to the challenge in local_challenge. Ship
+ * these over the secure channel to a domain controller and
+ * see if they were valid.
+ */
- return(True);
-}
+ ZERO_STRUCT(cli);
-/****************************************************************************
-attempted support for server level security
-****************************************************************************/
-BOOL server_validate(char *buf)
-{
- pstring inbuf,outbuf;
- BOOL ret;
+ if(cli_initialise(&cli) == False) {
+ DEBUG(0,("domain_client_validate: unable to initialize client connection.\n"));
+ return False;
+ }
- if (password_client < 0) {
- DEBUG(1,("%s not connected\n",pserver));
- return(False);
- }
+ /*
+ * Treat each name in the 'password server =' line as a potential
+ * PDC/BDC. Contact each in turn and try and authenticate.
+ */
- bzero(inbuf,sizeof(inbuf));
- memcpy(outbuf,buf,sizeof(outbuf));
+ p = lp_passwordserver();
+ while(p && next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) {
- /* send a session setup command */
- CVAL(outbuf,smb_flg) = 0x8;
- SSVAL(outbuf,smb_flg2,0x1);
- CVAL(outbuf,smb_vwv0) = 0xFF;
+ standard_sub_basic(remote_machine);
+ strupper(remote_machine);
+
+ if(!resolve_name( remote_machine, &dest_ip, 0x20)) {
+ DEBUG(1,("domain_client_validate: Can't resolve address for %s\n", remote_machine));
+ continue;
+ }
+
+ if (ismyip(dest_ip)) {
+ DEBUG(1,("domain_client_validate: Password server loop - not using password server %s\n",remote_machine));
+ continue;
+ }
+
+ if (!cli_connect(&cli, remote_machine, &dest_ip)) {
+ DEBUG(0,("domain_client_validate: unable to connect to SMB server on \
+machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
+ continue;
+ }
+
+ make_nmb_name(&calling, global_myname , 0x0 , scope);
+ make_nmb_name(&called , remote_machine, 0x20, scope);
- set_message(outbuf,smb_numwords(outbuf),smb_buflen(outbuf),False);
+ if (!cli_session_request(&cli, &calling, &called))
+ {
+ DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
+Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
+ cli_shutdown(&cli);
+ continue;
+ }
+
+ cli.protocol = PROTOCOL_NT1;
- SCVAL(inbuf,smb_rcls,1);
+ if (!cli_negprot(&cli)) {
+ DEBUG(0,("domain_client_validate: machine %s rejected the negotiate protocol. \
+Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
+ cli_shutdown(&cli);
+ continue;
+ }
+
+ if (cli.protocol != PROTOCOL_NT1) {
+ DEBUG(0,("domain_client_validate: machine %s didn't negotiate NT protocol.\n",
+ remote_machine));
+ cli_shutdown(&cli);
+ continue;
+ }
- send_smb(password_client,outbuf);
- ret = receive_smb(password_client,inbuf,5000);
+ /*
+ * Do an anonymous session setup.
+ */
- if (!ret || CVAL(inbuf,smb_rcls) != 0) {
- DEBUG(1,("password server %s rejected the password\n",pserver));
- return(False);
+ if (!cli_session_setup(&cli, "", "", 0, "", 0, "")) {
+ DEBUG(0,("domain_client_validate: machine %s rejected the session setup. \
+Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
+ cli_shutdown(&cli);
+ continue;
+ }
+
+ if (!(cli.sec_mode & 1)) {
+ DEBUG(1,("domain_client_validate: machine %s isn't in user level security mode\n",
+ remote_machine));
+ cli_shutdown(&cli);
+ continue;
+ }
+
+ if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) {
+ DEBUG(0,("domain_client_validate: machine %s rejected the tconX on the IPC$ share. \
+Error was : %s.\n", remote_machine, cli_errstr(&cli) ));
+ cli_shutdown(&cli);
+ continue;
+ }
+
+ /*
+ * We have an anonymous connection to IPC$.
+ */
+ connected_ok = True;
+ break;
}
- /* if logged in as guest then reject */
- if ((SVAL(inbuf,smb_vwv2) & 1) != 0) {
- DEBUG(1,("password server %s gave us guest only\n",pserver));
- return(False);
+ if (!connected_ok) {
+ DEBUG(0,("domain_client_validate: Domain password server not available.\n"));
+ cli_shutdown(&cli);
+ return False;
}
- DEBUG(3,("password server %s accepted the password\n",pserver));
+ /*
+ * Ok - we have an anonymous connection to the IPC$ share.
+ * Now start the NT Domain stuff :-).
+ */
-#if !KEEP_PASSWORD_SERVER_OPEN
- close(password_client); password_client= -1;
-#endif
+ if(cli_nt_session_open(&cli, PIPE_NETLOGON) == False) {
+ DEBUG(0,("domain_client_validate: unable to open the domain client session to \
+machine %s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+ return False;
+ }
- return(True);
-}
+ if(cli_nt_setup_creds(&cli, trust_passwd) == False) {
+ DEBUG(0,("domain_client_validate: unable to setup the PDC credentials to machine \
+%s. Error was : %s.\n", remote_machine, cli_errstr(&cli)));
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+ return False;
+ }
+
+ /* We really don't care what LUID we give the user. */
+ generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
+
+ if(cli_nt_login_network(&cli, domain, user, smb_uid_low, (char *)local_challenge,
+ ((smb_apasslen != 0) ? smb_apasswd : NULL),
+ ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL),
+ &ctr, &info3) == False) {
+ DEBUG(0,("domain_client_validate: unable to validate password for user %s in domain \
+%s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+ return False;
+ }
+
+ /*
+ * Here, if we really want it, we have lots of info about the user in info3.
+ */
+
+#if 0
+ /*
+ * We don't actually need to do this - plus it fails currently with
+ * NT_STATUS_INVALID_INFO_CLASS - we need to know *exactly* what to
+ * send here. JRA.
+ */
+ if(cli_nt_logoff(&cli, &ctr) == False) {
+ DEBUG(0,("domain_client_validate: unable to log off user %s in domain \
+%s to Domain controller %s. Error was %s.\n", user, domain, remote_machine, cli_errstr(&cli)));
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+ return False;
+ }
+#endif /* 0 */
+ cli_nt_session_close(&cli);
+ cli_ulogoff(&cli);
+ cli_shutdown(&cli);
+ return True;
+}
git.samba.org / samba.git / blobdiff