diff options
Diffstat (limited to 'source/smbd/password.c')
| -rw-r--r-- | source/smbd/password.c | 1663 |
1 files changed, 1434 insertions, 229 deletions
diff --git a/source/smbd/password.c b/source/smbd/password.c index f2956237dd2..9b9dfbcdf67 100644 --- a/source/smbd/password.c +++ b/source/smbd/password.c @@ -1,5 +1,6 @@ /* - Unix SMB/CIFS implementation. + Unix SMB/Netbios implementation. + Version 1.9. Password and authentication handling Copyright (C) Andrew Tridgell 1992-1998 @@ -20,19 +21,73 @@ #include "includes.h" +extern int Protocol; + /* users from session setup */ static pstring session_users=""; +extern pstring global_myname; +extern fstring global_myworkgroup; + +/* + * track the machine trust account password timeout when + * in domain mode security + */ +BOOL global_machine_password_needs_changing = False; + +/* 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) +{ + unsigned char buf[8]; + + generate_random_buffer(buf,8,False); + + 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; static int next_vuid = VUID_OFFSET; static int num_validated_vuids; /**************************************************************************** -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. + 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) { user_struct *usp; @@ -54,8 +109,9 @@ user_struct *get_valid_user_struct(uint16 vuid) } /**************************************************************************** -invalidate a uid + Invalidate a uid. ****************************************************************************/ + void invalidate_vuid(uint16 vuid) { user_struct *vuser = get_valid_user_struct(vuid); @@ -63,25 +119,20 @@ void invalidate_vuid(uint16 vuid) if (vuser == NULL) return; - SAFE_FREE(vuser->homedir); - - session_yield(vuser); + session_yield(vuid); DLIST_REMOVE(validated_users, vuser); - /* clear the vuid from the 'cache' on each connection, and - from the vuid 'owner' of connections */ - conn_clear_vuid_cache(vuid); - SAFE_FREE(vuser->groups); delete_nt_token(&vuser->nt_user_token); - SAFE_FREE(vuser); + safe_free(vuser); num_validated_vuids--; } /**************************************************************************** -invalidate all vuid entries for this process + Invalidate all vuid entries for this process. ****************************************************************************/ + void invalidate_all_vuids(void) { user_struct *usp, *next=NULL; @@ -94,14 +145,129 @@ void invalidate_all_vuids(void) } /**************************************************************************** -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. + Return a validated username. +****************************************************************************/ + +char *validated_username(uint16 vuid) +{ + user_struct *vuser = get_valid_user_struct(vuid); + if (vuser == NULL) + return 0; + return(vuser->user.unix_name); +} + +/**************************************************************************** + Return a validated domain. +****************************************************************************/ + +char *validated_domain(uint16 vuid) +{ + user_struct *vuser = get_valid_user_struct(vuid); + if (vuser == NULL) + return 0; + return(vuser->user.domain); +} + +/**************************************************************************** + Create the SID list for this user. +****************************************************************************/ + +NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest, NT_USER_TOKEN *sup_tok) +{ + extern DOM_SID global_sid_World; + extern DOM_SID global_sid_Network; + extern DOM_SID global_sid_Builtin_Guests; + extern DOM_SID global_sid_Authenticated_Users; + NT_USER_TOKEN *token; + DOM_SID *psids; + int i, psid_ndx = 0; + size_t num_sids = 0; + fstring sid_str; + + if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) + return NULL; + + ZERO_STRUCTP(token); + + /* We always have uid/gid plus World and Network and Authenticated Users or Guest SIDs. */ + num_sids = 5 + ngroups; + + if (sup_tok && sup_tok->num_sids) + num_sids += sup_tok->num_sids; + + if ((token->user_sids = (DOM_SID *)malloc( num_sids*sizeof(DOM_SID))) == NULL) { + SAFE_FREE(token); + return NULL; + } + + psids = token->user_sids; + + /* + * Note - user SID *MUST* be first in token ! + * se_access_check depends on this. + */ + + uid_to_sid( &psids[PRIMARY_USER_SID_INDEX], uid); + psid_ndx++; + + /* + * Primary group SID is second in token. Convention. + */ + + gid_to_sid( &psids[PRIMARY_GROUP_SID_INDEX], gid); + psid_ndx++; + + /* Now add the group SIDs. */ + + for (i = 0; i < ngroups; i++) { + if (groups[i] != gid) { + gid_to_sid( &psids[psid_ndx++], groups[i]); + } + } + + /* Now add the additional SIDs from the supplimentary token. */ + if (sup_tok) { + for (i = 0; i < sup_tok->num_sids; i++) + sid_copy( &psids[psid_ndx++], &sup_tok->user_sids[i] ); + } + + /* + * Finally add the "standard" SIDs. + * The only difference between guest and "anonymous" (which we + * don't really support) is the addition of Authenticated_Users. + */ + + sid_copy( &psids[psid_ndx++], &global_sid_World); + sid_copy( &psids[psid_ndx++], &global_sid_Network); + + if (is_guest) + sid_copy( &psids[psid_ndx++], &global_sid_Builtin_Guests); + else + sid_copy( &psids[psid_ndx++], &global_sid_Authenticated_Users); + + token->num_sids = psid_ndx; + + /* Dump list of sids in token */ + + for (i = 0; i < token->num_sids; i++) { + DEBUG(5, ("user token sid %s\n", + sid_to_string(sid_str, &token->user_sids[i]))); + } + + return token; +} + +/**************************************************************************** + 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. ****************************************************************************/ -int register_vuid(auth_serversupplied_info *server_info, const char *smb_name) +int register_vuid(uid_t uid,gid_t gid, char *unix_name, char *requested_name, + char *domain,BOOL guest, NT_USER_TOKEN **pptok) { user_struct *vuser = NULL; + struct passwd *pwfile; /* for getting real name from passwd file */ /* Ensure no vuid gets registered in share level security. */ if(lp_security() == SEC_SHARE) @@ -118,6 +284,9 @@ int register_vuid(auth_serversupplied_info *server_info, const char *smb_name) ZERO_STRUCTP(vuser); + DEBUG(10,("register_vuid: (%u,%u) %s %s %s guest=%d\n", (unsigned int)uid, (unsigned int)gid, + unix_name, requested_name, domain, guest )); + /* Allocate a free vuid. Yes this is a linear search... :-) */ while( get_valid_user_struct(next_vuid) != NULL ) { next_vuid++; @@ -129,162 +298,365 @@ int register_vuid(auth_serversupplied_info *server_info, const char *smb_name) DEBUG(10,("register_vuid: allocated vuid = %u\n", (unsigned int)next_vuid )); vuser->vuid = next_vuid; - - /* the next functions should be done by a SID mapping system (SMS) as - * the new real sam db won't have reference to unix uids or gids + vuser->uid = uid; + vuser->gid = gid; + vuser->guest = guest; + fstrcpy(vuser->user.unix_name,unix_name); + fstrcpy(vuser->user.smb_name,requested_name); + fstrcpy(vuser->user.domain,domain); + + vuser->n_groups = 0; + vuser->groups = NULL; + + /* Find all the groups this uid is in and store them. + Used by change_to_user() */ + initialise_groups(unix_name, uid, gid); + get_current_groups( vuser->gid, &vuser->n_groups, &vuser->groups); + +#ifdef HAVE_GETGROUPS_TOO_MANY_EGIDS + /* + * Under OSes to which this applies, we get GID 0 as the first + * element of vuser->groups, so we put GID back in there. + * It is ignored by setgroups */ - if (!IS_SAM_UNIX_USER(server_info->sam_account)) { - DEBUG(0,("Attempted session setup with invalid user. No uid/gid in SAM_ACCOUNT (flags:%x)\n", pdb_get_init_flag(server_info->sam_account))); - free(vuser); - return UID_FIELD_INVALID; + if (vuser->n_groups) vuser->groups[0] = gid; +#endif /* HAVE_GETGROUPS_TOO_MANY_EGIDS */ + + if (*pptok) + add_supplementary_nt_login_groups(&vuser->n_groups, &vuser->groups, pptok); + + /* Create an NT_USER_TOKEN struct for this user. */ + vuser->nt_user_token = create_nt_token(uid,gid, vuser->n_groups, vuser->groups, guest, *pptok); + + next_vuid++; + num_validated_vuids++; + + DLIST_ADD(validated_users, vuser); + + DEBUG(3,("uid %d registered to name %s\n",(int)uid,unix_name)); + + DEBUG(3, ("Clearing default real name\n")); + if ((pwfile=sys_getpwnam(vuser->user.unix_name))!= NULL) { + DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,pwfile->pw_gecos)); + fstrcpy(vuser->user.full_name, pwfile->pw_gecos); } - - vuser->uid = pdb_get_uid(server_info->sam_account); - vuser->gid = pdb_get_gid(server_info->sam_account); - - vuser->n_groups = server_info->n_groups; - if (vuser->n_groups) { - if (!(vuser->groups = memdup(server_info->groups, sizeof(gid_t) * vuser->n_groups))) { - DEBUG(0,("register_vuid: failed to memdup vuser->groups\n")); - free(vuser); - return UID_FIELD_INVALID; - } + + if (!session_claim(vuser->vuid)) { + DEBUG(1,("Failed to claim session for vuid=%d\n", vuser->vuid)); + invalidate_vuid(vuser->vuid); + return -1; } - vuser->guest = server_info->guest; - fstrcpy(vuser->user.unix_name, pdb_get_username(server_info->sam_account)); - fstrcpy(vuser->user.smb_name, smb_name); - fstrcpy(vuser->user.domain, pdb_get_domain(server_info->sam_account)); - fstrcpy(vuser->user.full_name, pdb_get_fullname(server_info->sam_account)); + return vuser->vuid; +} + +/**************************************************************************** + Add a name to the session users list. +****************************************************************************/ - { - /* Keep the homedir handy */ - const char *homedir = pdb_get_homedir(server_info->sam_account); - const char *unix_homedir = pdb_get_unix_homedir(server_info->sam_account); /* should be optained by SMS */ - const char *logon_script = pdb_get_logon_script(server_info->sam_account); - if (homedir) { - vuser->homedir = smb_xstrdup(homedir); - } +void add_session_user(char *user) +{ + fstring suser; + StrnCpy(suser,user,sizeof(suser)-1); - if (unix_homedir) { - vuser->unix_homedir = smb_xstrdup(unix_homedir); - } + if (!Get_Pwnam(suser,True)) + return; - if (logon_script) { - vuser->logon_script = smb_xstrdup(logon_script); + if (suser && *suser && !in_list(suser,session_users,False)) { + if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring)) + DEBUG(1,("Too many session users??\n")); + else { + pstrcat(session_users," "); + pstrcat(session_users,suser); } } +} - memcpy(vuser->session_key, server_info->session_key, sizeof(vuser->session_key)); +/**************************************************************************** + Update the encrypted smbpasswd file from the plaintext username and password. +*****************************************************************************/ - DEBUG(10,("register_vuid: (%u,%u) %s %s %s guest=%d\n", - (unsigned int)vuser->uid, - (unsigned int)vuser->gid, - vuser->user.unix_name, vuser->user.smb_name, vuser->user.domain, vuser->guest )); +static BOOL update_smbpassword_file(char *user, char *password) +{ + SAM_ACCOUNT *sampass = NULL; + BOOL ret; - DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->user.unix_name,vuser->user.full_name)); + pdb_init_sam(&sampass); + + become_root(); + ret = pdb_getsampwnam(sampass, user); + unbecome_root(); - if (server_info->ptok) { - vuser->nt_user_token = dup_nt_token(server_info->ptok); - } else { - DEBUG(1, ("server_info does not contain a user_token - cannot continue\n")); - free(vuser); - return UID_FIELD_INVALID; + if(!ret) { + DEBUG(0,("update_smbpassword_file: pdb_getsampwnam failed to locate %s\n", user)); + return False; } - DEBUG(3,("UNIX uid %d is UNIX user %s, and will be vuid %u\n",(int)vuser->uid,vuser->user.unix_name, vuser->vuid)); + /* + * Remove the account disabled flag - we are updating the + * users password from a login. + */ + pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED); - next_vuid++; - num_validated_vuids++; + /* Here, the flag is one, because we want to ignore the + XXXXXXX'd out password */ + ret = change_oem_password( sampass, password, True); + if (ret == False) { + DEBUG(3,("change_oem_password returned False\n")); + } + + if (sampass) + pdb_free_sam(sampass); + + return ret; +} - DLIST_ADD(validated_users, vuser); +/**************************************************************************** + Core of smb password checking routine. +****************************************************************************/ - if (!session_claim(vuser)) { - DEBUG(1,("Failed to claim session for vuid=%d\n", vuser->vuid)); - invalidate_vuid(vuser->vuid); - return -1; +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 True; + + 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(SAM_ACCOUNT *sampass, uchar chal[8], + uchar lm_pass[24], uchar nt_pass[24]) +{ + uchar challenge[8]; + char* user_name; + uint8 *nt_pw, *lm_pw; + + if (!lm_pass || !sampass) + return(False); + + user_name = pdb_get_username(sampass); + + DEBUG(4,("smb_password_ok: Checking SMB password for user %s\n",user_name)); + + if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) { + DEBUG(1,("smb_password_ok: account for user %s was disabled.\n", user_name)); + return(False); } - /* Register a home dir service for this user */ - if ((!vuser->guest) && vuser->unix_homedir && *(vuser->unix_homedir)) { - DEBUG(3, ("Adding/updating homes service for user '%s' using home direcotry: '%s'\n", - vuser->user.unix_name, vuser->unix_homedir)); - vuser->homes_snum = add_home_service(vuser->user.unix_name, vuser->user.unix_name, vuser->unix_homedir); + if (chal == NULL) { + DEBUG(5,("smb_password_ok: use last SMBnegprot challenge\n")); + if (!last_challenge(challenge)) { + DEBUG(1,("smb_password_ok: no challenge done - password failed\n")); + return False; + } } else { - vuser->homes_snum = -1; + DEBUG(5,("smb_password_ok: challenge received\n")); + memcpy(challenge, chal, 8); } + + nt_pw = pdb_get_nt_passwd(sampass); - return vuser->vuid; -} + if ((Protocol >= PROTOCOL_NT1) && (nt_pw != 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 *)nt_pw, challenge)) { + DEBUG(4,("smb_password_ok: NT MD4 password check succeeded\n")); + return(True); + } + DEBUG(4,("smb_password_ok: NT MD4 password check failed\n")); + } + + /* Try against the lanman password. pdb_get_lanman_passwd(sampass) == NULL + means no password, allow access. */ + + lm_pw = pdb_get_lanman_passwd(sampass); + + if((lm_pw == NULL) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) { + DEBUG(4,("smb_password_ok: no password required for user %s\n",user_name)); + return True; + } + + if(lp_lanman_auth() && (lm_pw != NULL)) { + DEBUG(4,("smb_password_ok: Checking LM password\n")); + if(smb_password_check((char *)lm_pass,(uchar *)lm_pw, challenge)) { + DEBUG(4,("smb_password_ok: LM password check succeeded\n")); + return(True); + } + DEBUG(4,("smb_password_ok: LM password check failed\n")); + } + return False; +} /**************************************************************************** -add a name to the session users list + 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. ****************************************************************************/ -void add_session_user(const char *user) + +BOOL pass_check_smb(char *user, char *domain, uchar *chal, + uchar *lm_pwd, uchar *nt_pwd, struct passwd *pwd) { - fstring suser; - struct passwd *passwd; + SAM_ACCOUNT *sampass = NULL; - if (!(passwd = Get_Pwnam(user))) return; + if (!lm_pwd || !nt_pwd) + return(False); - StrnCpy(suser,passwd->pw_name,sizeof(suser)-1); + /* get the account information */ + pdb_init_sam(&sampass); + if (!pdb_getsampwnam(sampass, user)) { + DEBUG(1,("Couldn't find user '%s' in passdb.\n", user)); + pdb_free_sam(sampass); + return(False); + } - if (suser && *suser && !in_list(suser,session_users,False)) - { - if (strlen(suser) + strlen(session_users) + 2 >= sizeof(pstring)) - DEBUG(1,("Too many session users??\n")); - else - { - pstrcat(session_users," "); - pstrcat(session_users,suser); + /* Quit if the account was disabled. */ + if(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) { + DEBUG(1,("Account for user '%s' was disabled.\n", user)); + pdb_free_sam(sampass); + return(False); } - } -} + if (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) { + if (lp_null_passwords()) { + DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", user)); + pdb_free_sam(sampass); + return(True); + } else { + DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", user)); + pdb_free_sam(sampass); + return(False); + } + } + + if (smb_password_ok(sampass, chal, lm_pwd, nt_pwd)) { + pdb_free_sam(sampass); + return(True); + } + + DEBUG(2,("pass_check_smb failed - invalid password for user [%s]\n", user)); + + pdb_free_sam(sampass); + return False; +} + /**************************************************************************** -check if a username is valid + 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 user_ok(const char *user,int snum) + +BOOL password_ok(char *user, char *password, int pwlen, struct passwd *pwd) { - char **valid, **invalid; - BOOL ret; - valid = invalid = NULL; - ret = True; + BOOL ret; - if (lp_invalid_users(snum)) { - str_list_copy(&invalid, lp_invalid_users(snum)); - if (invalid && str_list_substitute(invalid, "%S", lp_servicename(snum))) { - ret = !user_in_list(user, invalid); - } + if ((pwlen == 0) && !lp_null_passwords()) { + DEBUG(4,("Null passwords not allowed.\n")); + return False; } - if (invalid) str_list_free (&invalid); - if (ret && lp_valid_users(snum)) { - str_list_copy(&valid, lp_valid_users(snum)); - if (valid && str_list_substitute(valid, "%S", lp_servicename(snum))) { - ret = user_in_list(user,valid); + if (pwlen == 24 || (lp_encrypted_passwords() && (pwlen == 0) && lp_null_passwords())) { + /* if 24 bytes long assume it is an encrypted password */ + uchar challenge[8]; + + if (!last_challenge(challenge)) { + DEBUG(0,("Error: challenge not done for user=%s\n", user)); + return False; } - } - if (valid) str_list_free (&valid); + + ret = pass_check_smb(user, global_myworkgroup, + challenge, (uchar *)password, (uchar *)password, pwd); + + /* + * Try with PAM (may not be compiled in - returns True if not. JRA). + * FIXME ! Should this be called if we're using winbindd ? What about + * non-local accounts ? JRA. + */ + + if (ret) + return (NT_STATUS_V(smb_pam_accountcheck(user)) == NT_STATUS_V(NT_STATUS_OK)); + + return ret; + } + + 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)-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 = str_list_make (lp_username(snum), NULL); - if (user_list && str_list_substitute(user_list, "%S", lp_servicename(snum))) { - ret = user_in_list(user, user_list); - } - if (user_list) str_list_free (&user_list); + 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 + Validate a group username entry. Return the username or NULL. ****************************************************************************/ -static char *validate_group(char *group, DATA_BLOB password,int snum) + +static char *validate_group(const char *group,char *password,int pwlen,int snum) { #ifdef HAVE_NETGROUP { @@ -293,7 +665,7 @@ static char *validate_group(char *group, DATA_BLOB password,int snum) while (getnetgrent(&host, &user, &domain)) { if (user) { if (user_ok(user, snum) && - password_ok(user,password)) { + password_ok(user,password,pwlen,NULL)) { endnetgrent(); return(user); } @@ -303,66 +675,24 @@ static char *validate_group(char *group, DATA_BLOB password,int snum) } #endif -#ifdef HAVE_GETGRENT { - struct group *gptr; - setgrent(); - while ((gptr = (struct group *)getgrent())) { - if (strequal(gptr->gr_name,group)) - break; - } - - /* - * As user_ok can recurse doing a getgrent(), we must - * copy the member list into a pstring on the stack before - * use. Bug pointed out by leon@eatworms.swmed.edu. - */ - - if (gptr) { - pstring member_list; - char *member; - size_t copied_len = 0; - int i; - - *member_list = '\0'; - member = member_list; - - for(i = 0; gptr->gr_mem && gptr->gr_mem[i]; i++) { - size_t member_len = strlen(gptr->gr_mem[i]) + 1; - if( copied_len + member_len < sizeof(pstring)) { - - DEBUG(10,("validate_group: = gr_mem = %s\n", gptr->gr_mem[i])); - - safe_strcpy(member, gptr->gr_mem[i], sizeof(pstring) - copied_len - 1); - copied_len += member_len; - member += copied_len; - } else { - *member = '\0'; - } + struct sys_userlist *user_list = get_users_in_group(group); + struct sys_userlist *member; + + for (member = user_list; member; member = member->next) { + static fstring name; + fstrcpy(name,member->unix_name); + if (user_ok(name,snum) && + password_ok(name,password,pwlen,NULL)) { + free_userlist(user_list); + return(&name[0]); } - endgrent(); - - member = member_list; - while (*member) { - static fstring name; - fstrcpy(name,member); - if (user_ok(name,snum) && - password_ok(name,password)) { - endgrent(); - return(&name[0]); - } - - DEBUG(10,("validate_group = member = %s\n", member)); - - member += strlen(member) + 1; - } - } else { - endgrent(); - return NULL; + DEBUG(10,("validate_group = member = %s\n", member->unix_name)); } + free_userlist(user_list); } -#endif + return(NULL); } @@ -371,18 +701,43 @@ static char *validate_group(char *group, DATA_BLOB password,int snum) Note this is *NOT* used when logging on using sessionsetup_and_X. ****************************************************************************/ -BOOL authorise_login(int snum, fstring user, DATA_BLOB password, - BOOL *guest) +BOOL authorise_login(int snum,char *user,char *password, int pwlen, + BOOL *guest,BOOL *force,uint16 vuid) { BOOL ok = False; - + user_struct *vuser = get_valid_user_struct(vuid); + #if DEBUG_PASSWORD DEBUG(100,("authorise_login: checking authorisation on user=%s pass=%s\n", - user,password.data)); + user,password)); #endif *guest = False; + if (GUEST_ONLY(snum)) + *force = True; + + if (!GUEST_ONLY(snum) && (lp_security() > SEC_SHARE)) { + + /* + * We should just use the given vuid from a sessionsetup_and_X. + */ + + if (!vuser) { + DEBUG(1,("authorise_login: refusing user %s with no session setup\n", + user)); + return False; + } + + if (!vuser->guest && user_ok(vuser->user.unix_name,snum)) { + fstrcpy(user,vuser->user.unix_name); + *guest = False; + DEBUG(3,("authorise_login: ACCEPTED: validated uid ok as non-guest \ +(user=%s)\n", user)); + return True; + } + } + /* there are several possibilities: 1) login as the given user with given password 2) login as a previously registered username with the given password @@ -395,67 +750,105 @@ BOOL authorise_login(int snum, fstring user, DATA_BLOB password, if the service is guest_only then steps 1 to 5 are skipped */ - /* now check the list of session users */ - 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; - fstrcpy(user2,auser); - if (!user_ok(user2,snum)) - continue; - - if (password_ok(user2,password)) { + if (!(GUEST_ONLY(snum) && GUEST_OK(snum))) { + /* check the given username and password */ + if (!ok && (*user) && user_ok(user,snum)) { + ok = password_ok(user,password, pwlen, NULL); + if (ok) + DEBUG(3,("authorise_login: ACCEPTED: given username (%s) password ok\n", + user )); + } + + /* check for a previously registered guest username */ + if (!ok && (vuser != 0) && vuser->guest) { + if (user_ok(vuser->user.unix_name,snum) && + password_ok(vuser->user.unix_name, password, pwlen, NULL)) { + fstrcpy(user, vuser->user.unix_name); + vuser->guest = False; + DEBUG(3,("authorise_login: ACCEPTED: given password with registered user %s\n", user)); ok = True; - fstrcpy(user,user2); - DEBUG(3,("authorise_login: ACCEPTED: session list username (%s) \ -and given password ok\n", user)); } } - - SAFE_FREE(user_list); - } - - /* check the user= fields and the given password */ - if (!ok && lp_username(snum)) { - char *auser; - pstring user_list; - StrnCpy(user_list,lp_username(snum),sizeof(pstring)); - - pstring_sub(user_list,"%S",lp_servicename(snum)); - - for (auser=strtok(user_list,LIST_SEP); auser && !ok; - auser = strtok(NULL,LIST_SEP)) { - if (*auser == '@') { - auser = validate_group(auser+1,password,snum); - if (auser) { - ok = True; - fstrcpy(user,auser); - DEBUG(3,("authorise_login: ACCEPTED: group username \ -and given password ok (%s)\n", user)); - } - } else { + + /* now check the list of session users */ + 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; fstrcpy(user2,auser); - if (user_ok(user2,snum) && password_ok(user2,password)) { + if (!user_ok(user2,snum)) + continue; + + if (password_ok(user2,password, pwlen, NULL)) { ok = True; fstrcpy(user,user2); - DEBUG(3,("authorise_login: ACCEPTED: user list username \ + DEBUG(3,("authorise_login: ACCEPTED: session list username (%s) \ +and given password ok\n", user)); + } + } + + SAFE_FREE(user_list); + } + + /* check for a previously validated username/password pair */ + if (!ok && (lp_security() > SEC_SHARE) && (vuser != 0) && !vuser->guest && + user_ok(vuser->user.unix_name,snum)) { + fstrcpy(user,vuser->user.unix_name); + *guest = False; + DEBUG(3,("authorise_login: ACCEPTED: validated uid (%s) as non-guest\n", + user)); + ok = True; + } + + /* check for a rhosts entry */ + if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) { + ok = True; + DEBUG(3,("authorise_login: ACCEPTED: hosts equiv or rhosts entry for %s\n", + user)); + } + + /* check the user= fields and the given password */ + if (!ok && lp_username(snum)) { + char *auser; + pstring user_list; + StrnCpy(user_list,lp_username(snum),sizeof(pstring)); + + pstring_sub(user_list,"%S",lp_servicename(snum)); + + for (auser=strtok(user_list,LIST_SEP); auser && !ok; + auser = strtok(NULL,LIST_SEP)) { + if (*auser == '@') { + auser = validate_group(auser+1,password,pwlen,snum); + if (auser) { + ok = True; + fstrcpy(user,auser); + DEBUG(3,("authorise_login: ACCEPTED: group username \ +and given password ok (%s)\n", user)); + } + } else { + fstring user2; + fstrcpy(user2,auser); + if (user_ok(user2,snum) && password_ok(user2,password,pwlen,NULL)) { + ok = True; + fstrcpy(user,user2); + DEBUG(3,("authorise_login: ACCEPTED: user list username \ and given password ok (%s)\n", user)); + } } } } - } + } /* not guest only */ /* check for a normal guest connection */ if (!ok && GUEST_OK(snum)) { fstring guestname; - StrnCpy(guestname,lp_guestaccount(),sizeof(guestname)-1); - if (Get_Pwnam(guestname)) { + StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1); + if (Get_Pwnam(guestname,True)) { fstrcpy(user,guestname); ok = True; DEBUG(3,("authorise_login: ACCEPTED: guest account and guest ok (%s)\n", @@ -473,3 +866,815 @@ and given password ok (%s)\n", user)); return(ok); } + +/**************************************************************************** + Read the a hosts.equiv or .rhosts file and check if it + allows this user from this machine. +****************************************************************************/ + +static BOOL check_user_equiv(char *user, char *remote, char *equiv_file) +{ + int plus_allowed = 1; + char *file_host; + char *file_user; + char **lines = file_lines_load(equiv_file, NULL, False); + int i; + + DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file)); + + if (! lines) + return False; + + for (i=0; lines[i]; i++) { + char *buf = lines[i]; + trim_string(buf," "," "); + + if (buf[0] != '#' && buf[0] != '\n') { + BOOL is_group = False; + int plus = 1; + char *bp = buf; + if (strcmp(buf, "NO_PLUS\n") == 0) { + DEBUG(6, ("check_user_equiv NO_PLUS\n")); + plus_allowed = 0; + } else { + if (buf[0] == '+') { + bp++; + if (*bp == '\n' && plus_allowed) { + /* a bare plus means everbody allowed */ + DEBUG(6, ("check_user_equiv everybody allowed\n")); + file_lines_free(lines); + return True; + } + } else if (buf[0] == '-') { + bp++; + plus = 0; + } + if (*bp == '@') { + is_group = True; + bp++; + } + file_host = strtok(bp, " \t\n"); + file_user = strtok(NULL, " \t\n"); + 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; + +#if defined(HAVE_NETGROUP) && defined(HAVE_YP_GET_DEFAULT_DOMAIN) + if (is_group) { + static char *mydomain = NULL; + if (!mydomain) + yp_get_default_domain(&mydomain); + if (mydomain && innetgr(file_host,remote,user,mydomain)) + host_ok = True; + } +#else + if (is_group) { + DEBUG(1,("Netgroups not configured\n")); + continue; + } +#endif + + /* is it this host */ + /* the fact that remote has come from a call of gethostbyaddr + * means that it may have the fully qualified domain name + * so we could look up the file version to get it into + * a canonical form, but I would rather just type it + * in full in the equiv file + */ + if (!host_ok && !is_group && strequal(remote, file_host)) + host_ok = True; + + if (!host_ok) + continue; + + /* is it this user */ + if (file_user == 0 || strequal(user, file_user)) { + DEBUG(5, ("check_user_equiv matched %s%s %s\n", + (plus ? "+" : "-"), file_host, + (file_user ? file_user : ""))); + file_lines_free(lines); + return (plus ? True : False); + } + } + } + } + } + file_lines_free(lines); + return False; +} + +/**************************************************************************** + Check for a possible hosts equiv or rhosts entry for the user. +****************************************************************************/ + +BOOL check_hosts_equiv(char *user) +{ + char *fname = NULL; + pstring rhostsfile; + struct passwd *pass = Get_Pwnam(user,True); + + if (!pass) + return(False); + + 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 (lp_use_rhosts()) { + char *home = get_user_service_home_dir(user); + if (home) { + slprintf(rhostsfile, sizeof(rhostsfile)-1, "%s/.rhosts", home); + if (check_user_equiv(user,client_name(),rhostsfile)) + return(True); + } + } + + return(False); +} + +/**************************************************************************** + Return the client state structure. +****************************************************************************/ + +struct cli_state *server_client(void) +{ + static struct cli_state pw_cli; + return &pw_cli; +} + +/**************************************************************************** + Support for server level security. +****************************************************************************/ + +struct cli_state *server_cryptkey(void) +{ + struct cli_state *cli; + fstring desthost; + struct in_addr dest_ip; + char *p, *pserver; + BOOL connected_ok = False; + + cli = server_client(); + + if (!cli_initialise(cli)) + return NULL; + + pserver = strdup(lp_passwordserver()); + p = pserver; + + while(next_token( &p, desthost, LIST_SEP, sizeof(desthost))) { + standard_sub_basic(desthost,sizeof(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; + } + } + + SAFE_FREE(pserver); + + if (!connected_ok) { + DEBUG(0,("password server not available\n")); + cli_shutdown(cli); + 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. +****************************************************************************/ + +BOOL server_validate(char *user, char *domain, + char *pass, int passlen, + char *ntpass, int ntpasslen) +{ + struct cli_state *cli; + static unsigned char badpass[24]; + static fstring baduser; + static BOOL tested_password_server = False; + static BOOL bad_password_server = False; + + 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)); + } + + if(baduser[0] == 0) { + fstrcpy(baduser, INVALID_USER_PREFIX); + fstrcat(baduser, global_myname); + } + + /* + * 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(!tested_password_server) { + if (cli_session_setup(cli, baduser, (char *)badpass, sizeof(badpass), + (char *)badpass, sizeof(badpass), domain)) { + + /* + * We connected to the password server so we + * can say we've tested it. + */ + tested_password_server = True; + + 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); + + /* + * Password server has the bug. + */ + bad_password_server = True; + return False; + } + cli_ulogoff(cli); + } + } else { + + /* + * We have already tested the password server. + * Fail immediately if it has the bug. + */ + + if(bad_password_server) { + DEBUG(0,("server_validate: [1] password server %s allows users as non-guest \ +with a bad password.\n", cli->desthost)); + DEBUG(0,("server_validate: [1] This is broken (and insecure) behaviour. Please do not \ +use this machine as the password server.\n")); + return False; + } + } + + /* + * 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; + } + + /* 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); + } + + cli_ulogoff(cli); + + return(True); +} + +static char *mutex_server_name; + +static BOOL grab_server_mutex(const char *name) +{ + mutex_server_name = strdup(name); + if (!mutex_server_name) { + DEBUG(0,("grab_server_mutex: malloc failed for %s\n", name)); + return False; + } + if (!message_named_mutex(name, 20)) { + DEBUG(10,("grab_server_mutex: failed for %s\n", name)); + SAFE_FREE(mutex_server_name); + return False; + } + + return True; +} + +static void release_server_mutex(void) +{ + if (mutex_server_name) { + message_named_mutex_release(mutex_server_name); + SAFE_FREE(mutex_server_name); + } +} + +/*********************************************************************** + 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 **ppcli, + char *server, unsigned char *trust_passwd) +{ + struct in_addr dest_ip; + fstring remote_machine; + struct cli_state *pcli = NULL; + + *ppcli = NULL; + + if(!(pcli = cli_initialise(NULL))) { + DEBUG(0,("connect_to_domain_password_server: unable to initialize client connection.\n")); + return False; + } + + if (is_ipaddress(server)) { + struct in_addr to_ip; + + /* we shouldn't have 255.255.255.255 forthe IP address of a password server anyways */ + if ((to_ip.s_addr=inet_addr(server)) == 0xFFFFFFFF) { + DEBUG (0,("connect_to_domain_password_server: inet_addr(%s) returned 0xFFFFFFFF!\n", server)); + return False; + } + + if (!name_status_find("*", 0, 0x20, to_ip, remote_machine)) { + DEBUG(1, ("connect_to_domain_password_server: Can't " "resolve name for IP %s\n", server)); + return False; + } + } else { + fstrcpy(remote_machine, server); + } + + standard_sub_basic(remote_machine,sizeof(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; + } + + /* we use a mutex to prevent two connections at once - when a NT PDC gets + two connections where one hasn't completed a negprot yet it will send a + TCP reset to the first connection (tridge) */ + + if (!grab_server_mutex(server)) + 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); + release_server_mutex(); + 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) )); + release_server_mutex(); + 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); + release_server_mutex(); + 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); + release_server_mutex(); + 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); + release_server_mutex(); + 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); + release_server_mutex(); + 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); + release_server_mutex(); + 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); + release_server_mutex(); + return False; + } + + if (!NT_STATUS_IS_OK(cli_nt_setup_creds(pcli, trust_passwd))) { + 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); + release_server_mutex(); + return(False); + } + + *ppcli = pcli; + + /* We exit here with the mutex *locked*. JRA */ + return True; +} + +/*********************************************************************** + Utility function to attempt a connection to an IP address of a DC. +************************************************************************/ + +static BOOL attempt_connect_to_dc(struct cli_state **ppcli, struct in_addr *ip, unsigned char *trust_passwd) +{ + fstring dc_name; + + /* + * Ignore addresses we have already tried. + */ + + if (is_zero_ip(*ip)) + return False; + + if (!lookup_dc_name(global_myname, lp_workgroup(), ip, dc_name)) + return False; + + return connect_to_domain_password_server(ppcli, dc_name, trust_passwd); +} + +/*********************************************************************** + We have been asked to dynamcially determine the IP addresses of + the PDC and BDC's for this DOMAIN, and query them in turn. +************************************************************************/ + +static BOOL find_connect_pdc(struct cli_state **ppcli, unsigned char *trust_passwd, time_t last_change_time) +{ + struct in_addr *ip_list = NULL; + int count = 0; + int i; + BOOL connected_ok = False; + time_t time_now = time(NULL); + BOOL use_pdc_only = False; + + /* + * If the time the machine password has changed + * was less than an hour ago then we need to contact + * the PDC only, as we cannot be sure domain replication + * has yet taken place. Bug found by Gerald (way to go + * Gerald !). JRA. + */ + + if (time_now - last_change_time < 3600) + use_pdc_only = True; + + if (!get_dc_list(use_pdc_only, lp_workgroup(), &ip_list, &count)) + return False; + + /* + * 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(ppcli, &ip_list[i], trust_passwd))) + break; + + zero_ip(&ip_list[i]); /* Tried and failed. */ + } + + /* + * Secondly try and contact a random PDC/BDC. + */ + if(!connected_ok) { + i = (sys_random() % count); + + if (!is_zero_ip(ip_list[i])) { + if (!(connected_ok = attempt_connect_to_dc(ppcli, &ip_list[i], trust_passwd))) + zero_ip(&ip_list[i]); /* 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 (is_zero_ip(ip_list[i])) + continue; + + if((connected_ok = attempt_connect_to_dc(ppcli, &ip_list[i], trust_passwd))) + break; + } + } + + SAFE_FREE(ip_list); + return connected_ok; +} + +/*********************************************************************** + 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, NT_USER_TOKEN **pptoken) +{ + unsigned char local_challenge[8]; + unsigned char local_lm_response[24]; + unsigned char local_nt_response[24]; + unsigned char trust_passwd[16]; + fstring remote_machine; + char *p, *pserver; + NET_ID_INFO_CTR ctr; + NET_USER_INFO_3 info3; + struct cli_state *pcli = NULL; + uint32 smb_uid_low; + BOOL connected_ok = False; + time_t last_change_time; + NTSTATUS status; + + if (pptoken) + *pptoken = NULL; + + 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_response); + smb_apasslen = 24; + smb_ntpasslen = 24; + smb_apasswd = (char *)local_lm_response; + smb_ntpasswd = (char *)local_nt_response; + } 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 for our primary domain + */ + + if (!secrets_fetch_trust_account_password(global_myworkgroup, trust_passwd, &last_change_time)) { + DEBUG(0, ("domain_client_validate: could not fetch trust account password for domain %s\n", global_myworkgroup)); + return False; + } + + /* Test if machine password is expired and need to be changed */ + if (time(NULL) > last_change_time + lp_machine_password_timeout()) + global_machine_password_needs_changing = True; + + /* + * 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. + */ + + /* + * Treat each name in the 'password server =' line as a potential + * PDC/BDC. Contact each in turn and try and authenticate. + */ + + pserver = lp_passwordserver(); + if (! *pserver) + pserver = "*"; + p = pserver; + + while (!connected_ok && + next_token(&p,remote_machine,LIST_SEP,sizeof(remote_machine))) { + if(strequal(remote_machine, "*")) { + connected_ok = find_connect_pdc(&pcli, trust_passwd, last_change_time); + } else { + connected_ok = connect_to_domain_password_server(&pcli, remote_machine, trust_passwd); + } + } + + if (!connected_ok) { + DEBUG(0,("domain_client_validate: Domain password server not available.\n")); + if (pcli) + cli_shutdown(pcli); + release_server_mutex(); + return False; + } + + /* We really don't care what LUID we give the user. */ + generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False); + + ZERO_STRUCT(info3); + + status = cli_nt_login_network(pcli, domain, user, smb_uid_low, (char *)local_challenge, + ((smb_apasslen != 0) ? smb_apasswd : NULL), + ((smb_ntpasslen != 0) ? smb_ntpasswd : NULL), + &ctr, &info3); + + if (!NT_STATUS_IS_OK(status)) { + + 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, get_nt_error_msg(status) )); + cli_nt_session_close(pcli); + cli_ulogoff(pcli); + cli_shutdown(pcli); + release_server_mutex(); + + if((NT_STATUS_V(status) == NT_STATUS_V(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. + */ + + /* Return group membership as returned by NT. This contains group + membership in nested groups which doesn't seem to be accessible by any + other means. We merge this into the NT_USER_TOKEN associated with the vuid + later on. */ + + if (pptoken && (info3.num_groups2 != 0)) { + NT_USER_TOKEN *ptok; + int i; + + *pptoken = NULL; + + if ((ptok = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) { + DEBUG(0, ("domain_client_validate: Out of memory allocating NT_USER_TOKEN\n")); + release_server_mutex(); + return False; + } + + ptok->num_sids = (size_t)info3.num_groups2; + if ((ptok->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptok->num_sids )) == NULL) { + DEBUG(0, ("domain_client_validate: Out of memory allocating group SIDS\n")); + SAFE_FREE(ptok); + release_server_mutex(); + return False; + } + + for (i = 0; i < ptok->num_sids; i++) { + sid_copy(&ptok->user_sids[i], &info3.dom_sid.sid); + sid_append_rid(&ptok->user_sids[i], info3.gids[i].g_rid); + } + *pptoken = ptok; + } + +#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(pcli, &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(pcli))); + cli_nt_session_close(pcli); + cli_ulogoff(pcli); + cli_shutdown(pcli); + release_server_mutex(); + return False; + } +#endif /* 0 */ + + /* Note - once the cli stream is shutdown the mem_ctx used + to allocate the other_sids and gids structures has been deleted - so + these pointers are no longer valid..... */ + + cli_nt_session_close(pcli); + cli_ulogoff(pcli); + cli_shutdown(pcli); + release_server_mutex(); + return True; +} |