diff options
Diffstat (limited to 'source3/smbd/password.c')
| -rw-r--r-- | source3/smbd/password.c | 1042 |
1 files changed, 954 insertions, 88 deletions
diff --git a/source3/smbd/password.c b/source3/smbd/password.c index e15e08a1af..9792c9ebc8 100644 --- a/source3/smbd/password.c +++ b/source3/smbd/password.c @@ -23,6 +23,7 @@ extern int DEBUGLEVEL; extern int Protocol; +extern struct in_addr ipzero; /* users from session setup */ static pstring session_users=""; @@ -31,6 +32,261 @@ extern pstring scope; extern pstring global_myname; extern fstring global_myworkgroup; +/* Data to do lanman1/2 password challenge. */ +static unsigned char saved_challenge[8]; +static BOOL challenge_sent=False; + +/******************************************************************* +Get the next challenge value - no repeats. +********************************************************************/ +void generate_next_challenge(char *challenge) +{ +#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(unsigned char *challenge) +{ + memcpy(saved_challenge,challenge,8); + challenge_sent = True; + return(True); +} + +/******************************************************************* +get the last challenge sent +********************************************************************/ +static BOOL last_challenge(unsigned char *challenge) +{ + if (!challenge_sent) return(False); + memcpy(challenge,saved_challenge,8); + return(True); +} + +/* this holds info on user ids that are already validated for this VC */ +static user_struct *validated_users = NULL; +static int num_validated_users = 0; + +/**************************************************************************** +check if a uid has been validated, and return an pointer to the user_struct +if it has. NULL if not. vuid is biased by an offset. This allows us to +tell random client vuid's (normally zero) from valid vuids. +****************************************************************************/ +user_struct *get_valid_user_struct(uint16 vuid) +{ + if (vuid == UID_FIELD_INVALID) + return NULL; + vuid -= VUID_OFFSET; + 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]; +} + +/**************************************************************************** +invalidate a uid +****************************************************************************/ +void invalidate_vuid(uint16 vuid) +{ + user_struct *vuser = get_valid_user_struct(vuid); + + 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; +} + + +/**************************************************************************** +return a validated username +****************************************************************************/ +char *validated_username(uint16 vuid) +{ + user_struct *vuser = get_valid_user_struct(vuid); + 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)) + { + DEBUG(0,("Unable to initgroups. Error was %s\n", strerror(errno) )); + if (getuid() == 0) + { + if (gid < 0 || gid > 32767 || uid < 0 || uid > 32767) + { + 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; + } + +#ifdef NGROUPS_MAX + if((groups = (gid_t *)malloc(sizeof(gid_t)*NGROUPS_MAX)) == NULL) +#else /* NGROUPS_MAX */ + if((groups = (gid_t *)malloc(sizeof(gid_t)*ngroups)) == NULL) +#endif /* NGROUPS_MAX */ + { + 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(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 (uint16)(i + VUID_OFFSET); /* User already validated */ + } +#endif + + validated_users = (user_struct *)Realloc(validated_users, + sizeof(user_struct)* + (num_validated_users+1)); + + if (!validated_users) + { + DEBUG(0,("Failed to realloc users struct!\n")); + num_validated_users = 0; + return UID_FIELD_INVALID; + } + + vuser = &validated_users[num_validated_users]; + num_validated_users++; + + vuser->uid = uid; + vuser->gid = gid; + vuser->guest = guest; + fstrcpy(vuser->name,unix_name); + fstrcpy(vuser->requested_name,requested_name); + + vuser->n_sids = 0; + vuser->sids = 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(unix_name,uid,gid, + &vuser->n_groups, + &vuser->groups); + + 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=sys_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); +} + /**************************************************************************** add a name to the session users list @@ -71,12 +327,17 @@ static BOOL update_smbpassword_file(char *user, char *password) DEBUG(0,("getsmbpwnam returned NULL\n")); return False; } - + + /* + * Remove the account disabled flag - we are updating the + * users password from a login. + */ + smbpw->acct_ctrl &= ~ACB_DISABLED; + /* Here, the flag is one, because we want to ignore the XXXXXXX'd out password */ ret = change_oem_password( smbpw, password, True); - if (!ret) - { + if (ret == False) { DEBUG(3,("change_oem_password returned False\n")); } @@ -88,16 +349,201 @@ static BOOL update_smbpassword_file(char *user, char *password) /**************************************************************************** +core of smb password checking routine. +****************************************************************************/ +BOOL smb_password_check(char *password, unsigned char *part_passwd, unsigned char *c8) +{ + /* Finish the encryption of part_passwd. */ + unsigned char p21[21]; + unsigned char p24[24]; + + if (part_passwd == NULL) + DEBUG(10,("No password set - allowing access\n")); + /* No password set - always true ! */ + if (part_passwd == NULL) + return 1; + + memset(p21,'\0',21); + memcpy(p21,part_passwd,16); + E_P24(p21, c8, p24); +#if DEBUG_PASSWORD + { + int i; + DEBUG(100,("Part password (P16) was |")); + for(i = 0; i < 16; i++) + DEBUG(100,("%X ", (unsigned char)part_passwd[i])); + DEBUG(100,("|\n")); + DEBUG(100,("Password from client was |")); + for(i = 0; i < 24; i++) + DEBUG(100,("%X ", (unsigned char)password[i])); + DEBUG(100,("|\n")); + DEBUG(100,("Given challenge was |")); + for(i = 0; i < 8; i++) + DEBUG(100,("%X ", (unsigned char)c8[i])); + DEBUG(100,("|\n")); + DEBUG(100,("Value from encryption was |")); + for(i = 0; i < 24; i++) + DEBUG(100,("%X ", (unsigned char)p24[i])); + DEBUG(100,("|\n")); + } +#endif + return (memcmp(p24, password, 24) == 0); +} + +/**************************************************************************** + Do a specific test for an smb password being correct, given a smb_password and + the lanman and NT responses. +****************************************************************************/ +BOOL smb_password_ok(struct smb_passwd *smb_pass, uchar chal[8], + uchar lm_pass[24], uchar nt_pass[24]) +{ + uchar challenge[8]; + + if (!lm_pass || !smb_pass) return(False); + + DEBUG(4,("Checking SMB password for user %s\n", + smb_pass->smb_name)); + + if(smb_pass->acct_ctrl & ACB_DISABLED) { + DEBUG(1,("account for user %s was disabled.\n", + smb_pass->smb_name)); + return(False); + } + + if (chal == NULL) + { + DEBUG(5,("use last SMBnegprot challenge\n")); + if (!last_challenge(challenge)) + { + DEBUG(1,("no challenge done - password failed\n")); + return False; + } + } + else + { + DEBUG(5,("challenge received\n")); + memcpy(challenge, chal, 8); + } + + 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). + */ + 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. smb_pass->smb_passwd == NULL means + no password, allow access. */ + + DEBUG(4,("Checking LM MD4 password\n")); + + 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((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); + } + + DEBUG(4,("LM MD4 password check failed\n")); + + return False; +} + + +/**************************************************************************** +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, + uchar *chal, uchar *lm_pwd, uchar *nt_pwd, + struct passwd *pwd) +{ + struct passwd *pass; + struct smb_passwd *smb_pass; + + if (!lm_pwd || !nt_pwd) + { + return(False); + } + + if (pwd != NULL && user == NULL) + { + pass = (struct passwd *) pwd; + user = pass->pw_name; + } + else + { + pass = Get_Pwnam(user,True); + } + + if (pass == NULL) + { + DEBUG(1,("Couldn't find user '%s' in UNIX password database.\n",user)); + return(False); + } + + smb_pass = getsmbpwnam(user); + + if (smb_pass == NULL) + { + DEBUG(1,("Couldn't find user '%s' in smb_passwd file.\n", user)); + return(False); + } + + /* Quit if the account was disabled. */ + if(smb_pass->acct_ctrl & ACB_DISABLED) { + DEBUG(1,("Account for user '%s' was disabled.\n", user)); + return(False); + } + + /* Ensure the uid's match */ + if (smb_pass->smb_userid != pass->pw_uid) + { + DEBUG(0,("Error : UNIX and SMB uids in password files do not match for user '%s'!\n", user)); + return(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); + } + + if (smb_password_ok(smb_pass, chal, lm_pwd, nt_pwd)) + { + return(True); + } + + DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user)); + 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, - uchar user_sess_key[16]) +BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd) { - if (pwlen >= 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords())) + if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords())) { - /* if 24 bytes or longer assume it is an encrypted password */ + /* if 24 bytes long assume it is an encrypted password */ uchar challenge[8]; if (!last_challenge(challenge)) @@ -106,10 +552,8 @@ BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd, return False; } - return pass_check_smb(getsmbpwnam(user), global_myworkgroup, - challenge, (uchar *)password, - pwlen, (uchar *)password, pwlen, - pwd, user_sess_key); + return pass_check_smb(user, global_myworkgroup, + challenge, (uchar *)password, (uchar *)password, pwd); } return pass_check(user, password, pwlen, pwd, @@ -117,71 +561,84 @@ BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd, 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)-1); + StrnCpy(invalid, lp_invalid_users(snum), sizeof(pstring)-1); + + pstring_sub(valid,"%S",lp_servicename(snum)); + pstring_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); + pstring_sub(user_list,"%S",lp_servicename(snum)); + ret = user_in_list(user,user_list); + } + + return(ret); +} + /**************************************************************************** validate a group username entry. Return the username or NULL ****************************************************************************/ -static char *validate_group(char *group,char *password,int pwlen,int snum, - uchar user_sess_key[16]) +static char *validate_group(char *group,char *password,int pwlen,int snum) { -#if defined(HAVE_NETGROUP) && defined(HAVE_GETNETGRENT) && defined(HAVE_SETNETGRENT) && defined(HAVE_ENDNETGRENT) - { - char *host, *user, *domain; - setnetgrent(group); - while (getnetgrent(&host, &user, &domain)) { - if (user) { - if (user_ok(user, snum) && - password_ok(user,password,pwlen,NULL, user_sess_key)) { - endnetgrent(); - return(user); +#ifdef HAVE_NETGROUP + { + char *host, *user, *domain; + setnetgrent(group); + while (getnetgrent(&host, &user, &domain)) { + if (user) { + if (user_ok(user, snum) && + password_ok(user,password,pwlen,NULL)) { + endnetgrent(); + return(user); + } + } + } + endnetgrent(); } - } - } - endnetgrent(); - } #endif -#ifdef HAVE_GETGRNAM - { - struct group *gptr = (struct group *)getgrnam(group); - char **member; - if (gptr) - { - member = gptr->gr_mem; - while (member && *member) - { - static fstring name; - fstrcpy(name,*member); - if (user_ok(name,snum) && - password_ok(name,password,pwlen,NULL, user_sess_key)) - return(&name[0]); - member++; - } -#ifdef GROUP_CHECK_PWENT +#ifdef HAVE_GETGRENT { - struct passwd *pwd; - static fstring tm; - - setpwent (); - while (pwd = getpwent ()) { - 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, user_sess_key)) { - fstrcpy(tm, pwd->pw_name); - endpwent (); - return tm; - } - } - } - endpwent (); + struct group *gptr; + char **member; + setgrent(); + while ((gptr = (struct group *)getgrent())) { + if (!strequal(gptr->gr_name,group)) + continue; + member = gptr->gr_mem; + while (member && *member) { + static fstring name; + fstrcpy(name,*member); + if (user_ok(name,snum) && + password_ok(name,password,pwlen,NULL)) { + endgrent(); + return(&name[0]); + } + member++; + } + } + endgrent(); } -#endif /* GROUP_CHECK_PWENT */ - } - } #endif - return(NULL); + return(NULL); } @@ -221,14 +678,14 @@ BOOL authorise_login(int snum,char *user,char *password, int pwlen, /* check the given username and password */ if (!ok && (*user) && user_ok(user,snum)) { - ok = password_ok(user,password, pwlen, NULL, vuser->user_sess_key); + ok = password_ok(user,password, pwlen, NULL); if (ok) DEBUG(3,("ACCEPTED: given username password ok\n")); } /* check for a previously registered guest username */ if (!ok && (vuser != 0) && vuser->guest) { if (user_ok(vuser->name,snum) && - password_ok(vuser->name, password, pwlen, NULL, vuser->user_sess_key)) { + password_ok(vuser->name, password, pwlen, NULL)) { fstrcpy(user, vuser->name); vuser->guest = False; DEBUG(3,("ACCEPTED: given password with registered user %s\n", user)); @@ -242,7 +699,7 @@ BOOL authorise_login(int snum,char *user,char *password, int pwlen, { char *auser; char *user_list = strdup(session_users); - if (!user_list) return False; + if (!user_list) return(False); for (auser=strtok(user_list,LIST_SEP); !ok && auser; @@ -252,7 +709,7 @@ BOOL authorise_login(int snum,char *user,char *password, int pwlen, fstrcpy(user2,auser); if (!user_ok(user2,snum)) continue; - if (password_ok(user2,password, pwlen, NULL, vuser->user_sess_key)) { + if (password_ok(user2,password, pwlen, NULL)) { ok = True; fstrcpy(user,user2); DEBUG(3,("ACCEPTED: session list username and given password ok\n")); @@ -283,7 +740,7 @@ BOOL authorise_login(int snum,char *user,char *password, int pwlen, pstring user_list; StrnCpy(user_list,lp_username(snum),sizeof(pstring)); - string_sub(user_list,"%S",lp_servicename(snum)); + pstring_sub(user_list,"%S",lp_servicename(snum)); for (auser=strtok(user_list,LIST_SEP); auser && !ok; @@ -291,7 +748,7 @@ BOOL authorise_login(int snum,char *user,char *password, int pwlen, { if (*auser == '@') { - auser = validate_group(auser+1,password,pwlen,snum, vuser->user_sess_key); + auser = validate_group(auser+1,password,pwlen,snum); if (auser) { ok = True; @@ -304,7 +761,7 @@ BOOL authorise_login(int snum,char *user,char *password, int pwlen, fstring user2; fstrcpy(user2,auser); if (user_ok(user2,snum) && - password_ok(user2,password,pwlen,NULL, vuser->user_sess_key)) + password_ok(user2,password,pwlen,NULL)) { ok = True; fstrcpy(user,user2); @@ -454,10 +911,10 @@ BOOL check_hosts_equiv(char *user) { char *fname = NULL; pstring rhostsfile; - const struct passwd *pass = Get_Pwnam(user,True); + struct passwd *pass = Get_Pwnam(user,True); if (!pass) - return False; + return(False); fname = lp_hosts_equiv(); @@ -470,7 +927,7 @@ BOOL check_hosts_equiv(char *user) if (lp_use_rhosts()) { - char *home = get_unixhome_dir(user); + char *home = get_user_home_dir(user); if (home) { extern int Client; slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home); @@ -479,13 +936,14 @@ BOOL check_hosts_equiv(char *user) } } - return False; + return(False); } /**************************************************************************** -return the client state structure + Return the client state structure. ****************************************************************************/ + struct cli_state *server_client(void) { static struct cli_state pw_cli; @@ -493,20 +951,77 @@ struct cli_state *server_client(void) } /**************************************************************************** -support for server level security + Support for server level security. ****************************************************************************/ + struct cli_state *server_cryptkey(void) { - if (cli_connect_serverlist(server_client(), lp_passwordserver())) - { - return server_client(); + struct cli_state *cli; + fstring desthost; + struct in_addr dest_ip; + char *p; + BOOL connected_ok = False; + + 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 (cli_connect(cli, desthost, &dest_ip)) { + DEBUG(3,("connected to password server %s\n",desthost)); + connected_ok = True; + break; + } + } + + if (!connected_ok) { + DEBUG(0,("password server not available\n")); + cli_shutdown(cli); + return NULL; } - return NULL; + + if (!attempt_netbios_session_request(cli, global_myname, desthost, &dest_ip)) + return NULL; + + DEBUG(3,("got session\n")); + + if (!cli_negprot(cli)) { + DEBUG(1,("%s rejected the negprot\n",desthost)); + cli_shutdown(cli); + return NULL; + } + + 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; + } + + DEBUG(3,("password server OK\n")); + + return cli; } /**************************************************************************** -validate a password with the password server + Validate a password with the password server. ****************************************************************************/ + BOOL server_validate(char *user, char *domain, char *pass, int passlen, char *ntpass, int ntpasslen) @@ -520,7 +1035,7 @@ BOOL server_validate(char *user, char *domain, if (!cli->initialised) { DEBUG(1,("password server %s is not connected\n", cli->desthost)); - return False; + return(False); } if(badpass[0] == 0) @@ -541,8 +1056,7 @@ BOOL server_validate(char *user, char *domain, */ if(!tested_password_server) { - if (cli_session_setup(cli, global_myname, - user, (char *)badpass, sizeof(badpass), + if (cli_session_setup(cli, user, (char *)badpass, sizeof(badpass), (char *)badpass, sizeof(badpass), domain)) { /* @@ -587,8 +1101,7 @@ use this machine as the password server.\n")); * not guest enabled, we can try with the real password. */ - if (!cli_session_setup(cli, global_myname, - user, pass, passlen, ntpass, ntpasslen, domain)) { + if (!cli_session_setup(cli, user, pass, passlen, ntpass, ntpasslen, domain)) { DEBUG(1,("password server %s rejected the password\n", cli->desthost)); return False; } @@ -597,12 +1110,365 @@ use this machine as the password server.\n")); 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; + return(False); } - cli_ulogoff(cli); return(True); } +/*********************************************************************** + Connect to a remote machine for domain security authentication + given a name or IP address. +************************************************************************/ + +static BOOL connect_to_domain_password_server(struct cli_state *pcli, char *remote_machine, + unsigned char *trust_passwd) +{ + struct in_addr dest_ip; + + if(cli_initialise(pcli) == False) { + DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n")); + return False; + } + + standard_sub_basic(remote_machine); + strupper(remote_machine); + + if(!resolve_name( remote_machine, &dest_ip, 0x20)) { + DEBUG(1,("connect_to_domain_password_server: Can't resolve address for %s\n", remote_machine)); + cli_shutdown(pcli); + return False; + } + + if (ismyip(dest_ip)) { + DEBUG(1,("connect_to_domain_password_server: Password server loop - not using password server %s\n", + remote_machine)); + cli_shutdown(pcli); + return False; + } + + if (!cli_connect(pcli, remote_machine, &dest_ip)) { + DEBUG(0,("connect_to_domain_password_server: unable to connect to SMB server on \ +machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli) )); + cli_shutdown(pcli); + return False; + } + + if (!attempt_netbios_session_request(pcli, global_myname, remote_machine, &dest_ip)) { + DEBUG(0,("connect_to_password_server: machine %s rejected the NetBIOS \ +session request. Error was : %s.\n", remote_machine, cli_errstr(pcli) )); + return False; + } + + pcli->protocol = PROTOCOL_NT1; + + if (!cli_negprot(pcli)) { + DEBUG(0,("connect_to_domain_password_server: machine %s rejected the negotiate protocol. \ +Error was : %s.\n", remote_machine, cli_errstr(pcli) )); + cli_shutdown(pcli); + return False; + } + + if (pcli->protocol != PROTOCOL_NT1) { + DEBUG(0,("connect_to_domain_password_server: machine %s didn't negotiate NT protocol.\n", + remote_machine)); + cli_shutdown(pcli); + return False; + } + + /* + * Do an anonymous session setup. + */ + + if (!cli_session_setup(pcli, "", "", 0, "", 0, "")) { + DEBUG(0,("connect_to_domain_password_server: machine %s rejected the session setup. \ +Error was : %s.\n", remote_machine, cli_errstr(pcli) )); + cli_shutdown(pcli); + return False; + } + + if (!(pcli->sec_mode & 1)) { + DEBUG(1,("connect_to_domain_password_server: machine %s isn't in user level security mode\n", + remote_machine)); + cli_shutdown(pcli); + return False; + } + + if (!cli_send_tconX(pcli, "IPC$", "IPC", "", 1)) { + DEBUG(0,("connect_to_domain_password_server: machine %s rejected the tconX on the IPC$ share. \ +Error was : %s.\n", remote_machine, cli_errstr(pcli) )); + cli_shutdown(pcli); + return False; + } + + /* + * We now have an anonymous connection to IPC$ on the domain password server. + */ + + /* + * Even if the connect succeeds we need to setup the netlogon + * pipe here. We do this as we may just have changed the domain + * account password on the PDC and yet we may be talking to + * a BDC that doesn't have this replicated yet. In this case + * a successful connect to a DC needs to take the netlogon connect + * into account also. This patch from "Bjart Kvarme" <bjart.kvarme@usit.uio.no>. + */ + + if(cli_nt_session_open(pcli, PIPE_NETLOGON) == False) { + DEBUG(0,("connect_to_domain_password_server: unable to open the domain client session to \ +machine %s. Error was : %s.\n", remote_machine, cli_errstr(pcli))); + cli_nt_session_close(pcli); + cli_ulogoff(pcli); + cli_shutdown(pcli); + return False; + } + + if (cli_nt_setup_creds(pcli, trust_passwd) == False) { + DEBUG(0,("connect_to_domain_password_server: unable to setup the PDC credentials to machine \ +%s. Error was : %s.\n", remote_machine, cli_errstr(pcli))); + cli_nt_session_close(pcli); + cli_ulogoff(pcli); + cli_shutdown(pcli); + return(False); + } + + return True; +} + +/*********************************************************************** + Utility function to attempt a connection to an IP address of a DC. +************************************************************************/ + +static BOOL attempt_connect_to_dc(struct cli_state *pcli, struct in_addr *ip, unsigned char *trust_passwd) +{ + fstring dc_name; + + /* + * Ignore addresses we have already tried. + */ + + if(ip_equal(ipzero, *ip)) + return False; + + if(!lookup_pdc_name(global_myname, lp_workgroup(), ip, dc_name)) + return False; + + return connect_to_domain_password_server(pcli, dc_name, trust_passwd); +} + +/*********************************************************************** + Do the same as security=server, but using NT Domain calls and a session + key from the machine password. +************************************************************************/ + +BOOL domain_client_validate( char *user, char *domain, + char *smb_apasswd, int smb_apasslen, + char *smb_ntpasswd, int smb_ntpasslen, + BOOL *user_exists) +{ + 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; + NET_ID_INFO_CTR ctr; + NET_USER_INFO_3 info3; + struct cli_state cli; + uint32 smb_uid_low; + BOOL connected_ok = False; + + if(user_exists != NULL) + *user_exists = True; /* Only set false on a very specific error. */ + + /* + * 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(strequal( domain, global_myname)) { + DEBUG(3,("domain_client_validate: Requested domain was for this machine.\n")); + 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; + } + } + + /* + * Get the machine account password. + */ + if (!trust_get_passwd( trust_passwd, global_myworkgroup, global_myname)) + { + return False; + } + + /* + * 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. + */ + + ZERO_STRUCT(cli); + + /* + * Treat each name in the 'password server =' line as a potential + * PDC/BDC. Contact each in turn and try and authenticate. + */ + + p = lp_passwordserver(); + while(!connected_ok && p && + next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) { + if(strequal(remote_machine, "*")) { + + /* + * We have been asked to dynamcially determine the IP addresses of + * the PDC and BDC's for this DOMAIN, and query them in turn. + */ + + struct in_addr *ip_list = NULL; + int count = 0; + int i; + + if(!get_dc_list(lp_workgroup(), &ip_list, &count)) + continue; + + /* + * Firstly try and contact a PDC/BDC who has the same + * network address as any of our interfaces. + */ + + for(i = 0; i < count; i++) { + if(!is_local_net(ip_list[i])) + continue; + + if((connected_ok = attempt_connect_to_dc(&cli, &ip_list[i], trust_passwd))) + break; + + ip_list[i] = ipzero; /* Tried and failed. */ + } + + /* + * Secondly try and contact a random PDC/BDC. + */ + + if(!connected_ok) { + i = (sys_random() % count); + + if(!(connected_ok = attempt_connect_to_dc(&cli, &ip_list[i], trust_passwd))) + ip_list[i] = ipzero; /* Tried and failed. */ + } + + /* + * Finally go through the IP list in turn, ignoring any addresses + * we have already tried. + */ + + if(!connected_ok) { + + /* + * Try and connect to any of the other IP addresses in the PDC/BDC list. + * Note that from a WINS server the #1 IP address is the PDC. + */ + + for(i = 0; i < count; i++) { + if((connected_ok = attempt_connect_to_dc(&cli, &ip_list[i], trust_passwd))) + break; + } + } + + if(ip_list != NULL) + free((char *)ip_list); + + } else { + connected_ok = connect_to_domain_password_server(&cli, remote_machine, trust_passwd); + } + } + + if (!connected_ok) { + DEBUG(0,("domain_client_validate: Domain password server not available.\n")); + 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) { + uint32 nt_rpc_err; + + cli_error(&cli, NULL, NULL, &nt_rpc_err); + 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); + + if((nt_rpc_err == NT_STATUS_NO_SUCH_USER) && (user_exists != NULL)) + *user_exists = False; + + 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; +} |