diff options
Diffstat (limited to 'source/smbd/password.c')
| -rw-r--r-- | source/smbd/password.c | 1572 |
1 files changed, 0 insertions, 1572 deletions
diff --git a/source/smbd/password.c b/source/smbd/password.c deleted file mode 100644 index 803418c97e3..00000000000 --- a/source/smbd/password.c +++ /dev/null @@ -1,1572 +0,0 @@ -/* - Unix SMB/Netbios implementation. - Version 1.9. - Password and authentication handling - Copyright (C) Andrew Tridgell 1992-1997 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - -#include "includes.h" - -#if (defined(NETGROUP) && defined (AUTOMOUNT)) -#include "rpcsvc/ypclnt.h" -#endif - -extern int DEBUGLEVEL; -extern int Protocol; - -/* 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]=""; - -#ifdef SMB_PASSWD -/* 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) -{ - 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; -} - -/******************************************************************* -set the last challenge sent, usually from a password server -********************************************************************/ -BOOL set_challenge(char *challenge) -{ - memcpy(saved_challenge,challenge,8); - challenge_sent = True; - return(True); -} - -/******************************************************************* -get the last challenge sent -********************************************************************/ -BOOL last_challenge(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; -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 == -1) || (validated_users[vuid].gid == -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 == 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; -} - - -/**************************************************************************** -return a validated username -****************************************************************************/ -char *validated_username(uint16 vuid) -{ - user_struct *vuser = get_valid_user_struct(vuid); - if(vuser == 0) - return 0; - return(vuser->name); -} - -/**************************************************************************** -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) -{ - user_struct *vuser; - -#if (defined(NETGROUP) && defined (AUTOMOUNT)) - int nis_error; /* returned by yp all functions */ - char *nis_result; /* yp_match inits this */ - int nis_result_len; /* and set this */ - char *nis_domain; /* yp_get_default_domain inits this */ - char *nis_map = (char *)lp_nis_home_map_name(); - int home_server_len; -#endif - struct passwd *pwfile; /* for getting real name from passwd file */ - int real_name_len; - - 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 */ - } - - 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; - strcpy(vuser->name,name); - - vuser->user_ngroups = 0; - vuser->user_groups = NULL; - vuser->user_igroups = 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); - - DEBUG(3,("uid %d registered to name %s\n",uid,name)); - -#if (defined(NETGROUP) && defined (AUTOMOUNT)) - vuser->home_share = NULL; - DEBUG(3, ("Setting default HOMESHR to: \\\\logon server\\HOMES\n")); - vuser->home_share = Realloc(vuser->home_share, 32); - strcpy(vuser->home_share,"\\\\%L\\HOMES"); - - if (nis_error = yp_get_default_domain(&nis_domain)) - DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error))); - DEBUG(3, ("NIS Domain: %s\n", nis_domain)); - - if (nis_error = yp_match(nis_domain, nis_map, vuser->name, strlen(vuser->name), - &nis_result, &nis_result_len)) - DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error))); - if (!nis_error && lp_nis_home_map()) { - home_server_len = strcspn(nis_result,":"); - DEBUG(3, ("NIS lookup succeeded\n\tHome server length: %d\n",home_server_len)); - vuser->home_share = (char *)Realloc(vuser->home_share, home_server_len+12); - DEBUG(3, ("\tAllocated %d bytes for HOMESHR\n",home_server_len+12 )); - strcpy(vuser->home_share,"\\\\"); - strncat(vuser->home_share, nis_result, home_server_len); - strcat(vuser->home_share,"\\homes"); - DEBUG(2,("\tUser = %s\n\tUID = %d\n\tNIS result = %s\n\tHOMESHR = %s\n", - vuser->name, vuser->uid, nis_result, vuser->home_share)); - } -#endif - - vuser->real_name = NULL; - DEBUG(3, ("Clearing default real name\n")); - vuser->real_name = Realloc(vuser->real_name, 15); - strcpy(vuser->real_name, "<Full Name>\0"); - if (lp_unix_realname()) { - pwfile=getpwnam(vuser->name); - DEBUG(3, ("User name: %s\tReal name: %s\n",vuser->name,pwfile->pw_gecos)); - real_name_len = strcspn(pwfile->pw_gecos, ","); - DEBUG(3, ("Real name length: %d\n", real_name_len)); - vuser->real_name = (char *)Realloc(vuser->real_name, real_name_len+1); - strncpy(vuser->real_name, pwfile->pw_gecos, real_name_len); - vuser->real_name[real_name_len]='\0'; - } - - return (uint16)((num_validated_users - 1) + VUID_OFFSET); -} - - -/**************************************************************************** -add a name to the session users list -****************************************************************************/ -void add_session_user(char *user) -{ - fstring suser; - StrnCpy(suser,user,sizeof(suser)-1); - - if (!Get_Pwnam(suser,True)) return; - - 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 - { - strcat(session_users," "); - strcat(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) -{ -#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")); - } - 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 USE_PAM -/******************************************************************* -check on PAM authentication -********************************************************************/ - -/* We first need some helper functions */ -#include <security/pam_appl.h> -/* Static variables used to communicate between the conversation function - * and the server_login function - */ -static char *PAM_username; -static char *PAM_password; - -/* PAM conversation function - * Here we assume (for now, at least) that echo on means login name, and - * echo off means password. - */ -static int PAM_conv (int num_msg, - const struct pam_message **msg, - struct pam_response **resp, - void *appdata_ptr) { - int count = 0, replies = 0; - struct pam_response *reply = NULL; - int size = sizeof(struct pam_response); - - #define GET_MEM if (reply) realloc(reply, size); else reply = malloc(size); \ - if (!reply) return PAM_CONV_ERR; \ - size += sizeof(struct pam_response) - #define COPY_STRING(s) (s) ? strdup(s) : NULL - - for (count = 0; count < num_msg; count++) { - switch (msg[count]->msg_style) { - case PAM_PROMPT_ECHO_ON: - GET_MEM; - reply[replies].resp_retcode = PAM_SUCCESS; - reply[replies++].resp = COPY_STRING(PAM_username); - /* PAM frees resp */ - break; - case PAM_PROMPT_ECHO_OFF: - GET_MEM; - reply[replies].resp_retcode = PAM_SUCCESS; - reply[replies++].resp = COPY_STRING(PAM_password); - /* PAM frees resp */ - break; - case PAM_TEXT_INFO: - /* ignore it... */ - break; - case PAM_ERROR_MSG: - default: - /* Must be an error of some sort... */ - free (reply); - return PAM_CONV_ERR; - } - } - if (reply) *resp = reply; - return PAM_SUCCESS; -} -static struct pam_conv PAM_conversation = { - &PAM_conv, - NULL -}; - - -static BOOL pam_auth(char *this_user,char *password) -{ - pam_handle_t *pamh; - int pam_error; - - /* Now use PAM to do authentication. For now, we won't worry about - * session logging, only authentication. Bail out if there are any - * errors. Since this is a limited protocol, and an even more limited - * function within a server speaking this protocol, we can't be as - * verbose as would otherwise make sense. - * Query: should we be using PAM_SILENT to shut PAM up? - */ - #define PAM_BAIL if (pam_error != PAM_SUCCESS) { \ - pam_end(pamh, 0); return False; \ - } - PAM_password = password; - PAM_username = this_user; - pam_error = pam_start("samba", this_user, &PAM_conversation, &pamh); - PAM_BAIL; - pam_error = pam_authenticate(pamh, 0); - PAM_BAIL; - /* It is not clear to me that account management is the right thing - * to do, but it is not clear that it isn't, either. This can be - * removed if no account management should be done. Alternately, - * put a pam_allow.so entry in /etc/pam.conf for account handling. */ - pam_error = pam_acct_mgmt(pamh, 0); - PAM_BAIL; - pam_end(pamh, PAM_SUCCESS); - /* If this point is reached, the user has been authenticated. */ - return(True); -} -#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); -} -#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 USE_PAM -/* This falls through if the password check fails - - if NO_CRYPT is defined this causes an error msg - saying Warning - no crypt available - - if NO_CRYPT is NOT defined this is a potential security hole - as it may authenticate via the crypt call when PAM - settings say it should fail. - if (pam_auth(this_user,password)) return(True); -Hence we make a direct return to avoid a second chance!!! -*/ - return (pam_auth(this_user,password)); -#endif - -#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. -****************************************************************************/ -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); -} -#endif - -/**************************************************************************** -check if a username/password is OK -****************************************************************************/ -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 - - DEBUG(4,("SMB Password - pwlen = %d, challenge_done = %d\n", pwlen, challenge_done)); - - if((pwlen == 24) && challenge_done) - { - DEBUG(4,("Checking SMB password for user %s (l=24)\n",user)); - - if (!pass) - { - DEBUG(3,("Couldn't find user %s\n",user)); - 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(Protocol >= PROTOCOL_NT1) - { - /* 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")); - } - } - - /* Try against the lanman password */ - - 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 password for user %s (l=%d)\n",user,pwlen)); - - if (!pass) - { - DEBUG(3,("Couldn't find user %s\n",user)); - return(False); - } - -#ifdef SHADOW_PWD - { - struct spwd *spass; - - /* 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 */ - - 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 - -#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 - -#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 - -#ifdef ULTRIX_AUTH - { - AUTHORIZATION *ap = getauthuid( pass->pw_uid ); - if (ap) - { - strcpy( pass->pw_passwd, ap->a_password ); - endauthent(); - } - } -#endif - - /* 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 - } - - /* try it as it came to us */ - if (password_check(password)) - { - update_protected_database(user,True); - return(True); - } - - /* 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); - - /* 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); - } - - /* give up? */ - if(level < 1) - { - update_protected_database(user,False); - - /* restore it */ - strcpy(password,pass2); - - return(False); - } - - /* last chance - all combinations of up to level chars upper! */ - strlower(password); - - if (string_combinations(password,password_check,level)) - { - update_protected_database(user,True); - return(True); - } - - update_protected_database(user,False); - - /* restore it */ - strcpy(password,pass2); - - return(False); -} - - - -/**************************************************************************** -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); - - 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); -} - - - - -/**************************************************************************** -validate a group username entry. Return the username or NULL -****************************************************************************/ -static char *validate_group(char *group,char *password,int pwlen,int snum) -{ -#ifdef 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(); - } -#endif - -#if HAVE_GETGRNAM - { - struct group *gptr = (struct group *)getgrnam(group); - char **member; - if (gptr) - { - member = gptr->gr_mem; - while (member && *member) - { - static fstring name; - strcpy(name,*member); - if (user_ok(name,snum) && - password_ok(name,password,pwlen,NULL)) - return(&name[0]); - member++; - } -#ifdef GROUP_CHECK_PWENT - { - 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)) { - strcpy(tm, pwd->pw_name); - endpwent (); - return tm; - } - } - } - endpwent (); - } -#endif /* GROUP_CHECK_PWENT */ - } - } -#endif - return(NULL); -} - - - -/**************************************************************************** -check for authority to login to a service with a given username/password -****************************************************************************/ -BOOL authorise_login(int snum,char *user,char *password, int pwlen, - BOOL *guest,BOOL *force,uint16 vuid) -{ - BOOL ok = False; - - *guest = False; - -#if DEBUG_PASSWORD - DEBUG(100,("checking authorisation on user=%s pass=%s\n",user,password)); -#endif - - /* there are several possabilities: - 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 - 4) login as a previously validated user/password pair - 5) login as the "user =" user with given password - 6) login as the "user =" user with no password (guest connection) - 7) login as guest user with no password - - if the service is guest_only then steps 1 to 5 are skipped - */ - - if (GUEST_ONLY(snum)) *force = True; - - if (!(GUEST_ONLY(snum) && GUEST_OK(snum))) - { - - user_struct *vuser = get_valid_user_struct(vuid); - - /* check the given username and password */ - if (!ok && (*user) && user_ok(user,snum)) { - 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)) { - strcpy(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); - - 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; - - 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; - } - - /* check for a rhosts entry */ - if (!ok && user_ok(user,snum) && check_hosts_equiv(user)) { - ok = True; - DEBUG(3,("ACCEPTED: hosts equiv or rhosts entry\n")); - } - - /* 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)); - - string_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; - strcpy(user,auser); - DEBUG(3,("ACCEPTED: group username and given password ok\n")); - } - } - else - { - fstring user2; - strcpy(user2,auser); - if (user_ok(user2,snum) && - password_ok(user2,password,pwlen,NULL)) - { - ok = True; - strcpy(user,user2); - DEBUG(3,("ACCEPTED: user list username and given password ok\n")); - } - } - } - } - } /* not guest only */ - - /* check for a normal guest connection */ - if (!ok && GUEST_OK(snum)) - { - fstring guestname; - StrnCpy(guestname,lp_guestaccount(snum),sizeof(guestname)-1); - if (Get_Pwnam(guestname,True)) - { - strcpy(user,guestname); - ok = True; - DEBUG(3,("ACCEPTED: guest account and guest ok\n")); - } - else - DEBUG(0,("Invalid guest account %s??\n",guestname)); - *guest = True; - *force = True; - } - - if (ok && !user_ok(user,snum)) - { - DEBUG(0,("rejected invalid user %s\n",user)); - ok = False; - } - - 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) -{ - pstring buf; - int plus_allowed = 1; - char *file_host; - char *file_user; - FILE *fp = fopen(equiv_file, "r"); - DEBUG(5, ("check_user_equiv %s %s %s\n", user, remote, equiv_file)); - if (! fp) return False; - while(fgets(buf, sizeof(buf), fp)) - { - 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")); - fclose(fp); - 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_user)); - if (file_host && *file_host) - { - BOOL host_ok = False; - -#ifdef NETGROUP - 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 - add -DNETGROUP and recompile\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)) - { - fclose(fp); - DEBUG(5, ("check_user_equiv matched %s%s %s\n", - (plus ? "+" : "-"), file_host, - (file_user ? file_user : ""))); - return (plus ? True : False); - } - } - } - } - } - fclose(fp); - 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_home_dir(user); - if (home) - { - sprintf(rhostsfile, "%s/.rhosts", home); - if (check_user_equiv(user,client_name(),rhostsfile)) - return(True); - } - } - - return(False); -} - - -int password_client = -1; -static fstring pserver; - -/**************************************************************************** -attempted support for server level security -****************************************************************************/ -BOOL server_cryptkey(char *buf) -{ - 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; - - if (password_client >= 0) - close(password_client); - password_client = -1; - - if (Protocol < PROTOCOL_NT1) { - strcpy(pass_protocol,"LM1.2X002"); - } else { - strcpy(pass_protocol,"NT LM 0.12"); - } - - bzero(inbuf,sizeof(inbuf)); - bzero(outbuf,sizeof(outbuf)); - - for (p=strtok(lp_passwordserver(),LIST_SEP); p ; p = strtok(NULL,LIST_SEP)) { - strcpy(desthost,p); - standard_sub_basic(desthost); - strupper(desthost); - - dest_ip = *interpret_addr2(desthost); - if (zero_ip(dest_ip)) { - DEBUG(1,("Can't resolve address for %s\n",p)); - continue; - } - - if (ismyip(dest_ip)) { - DEBUG(1,("Password server loop - disabling password server %s\n",p)); - continue; - } - - 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 (password_client < 0) { - DEBUG(1,("password server not available\n")); - return(False); - } - - - /* send a session request (RFC 8002) */ - - /* put in the destination name */ - len = 4; - p = outbuf+len; - name_mangle(desthost,p,' '); - len += name_len(p); - - /* and my name */ - p = outbuf+len; - name_mangle(remote_machine,p,' '); - len += name_len(p); - - _smb_setlen(outbuf,len); - CVAL(outbuf,0) = 0x81; - - 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); - } - - DEBUG(3,("got session\n")); - - bzero(outbuf,smb_size); - - /* setup the protocol string */ - set_message(outbuf,0,strlen(pass_protocol)+2,True); - p = smb_buf(outbuf); - *p++ = 2; - strcpy(p,pass_protocol); - - CVAL(outbuf,smb_com) = SMBnegprot; - CVAL(outbuf,smb_flg) = 0x8; - SSVAL(outbuf,smb_flg2,0x1); - - send_smb(password_client,outbuf); - ret = receive_smb(password_client,inbuf,5000); - - 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 (!(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); - } - - memcpy(buf,inbuf,smb_len(inbuf)+4); - - DEBUG(3,("password server OK\n")); - - return(True); -} - -/**************************************************************************** -attempted support for server level security -****************************************************************************/ -BOOL server_validate(char *buf) -{ - pstring inbuf,outbuf; - BOOL ret; - - if (password_client < 0) { - DEBUG(1,("%s not connected\n",pserver)); - return(False); - } - - bzero(inbuf,sizeof(inbuf)); - memcpy(outbuf,buf,sizeof(outbuf)); - - /* send a session setup command */ - CVAL(outbuf,smb_flg) = 0x8; - SSVAL(outbuf,smb_flg2,0x1); - CVAL(outbuf,smb_vwv0) = 0xFF; - - set_message(outbuf,smb_numwords(outbuf),smb_buflen(outbuf),False); - - SCVAL(inbuf,smb_rcls,1); - - send_smb(password_client,outbuf); - ret = receive_smb(password_client,inbuf,5000); - - if (!ret || CVAL(inbuf,smb_rcls) != 0) { - DEBUG(1,("password server %s rejected the password\n",pserver)); - return(False); - } - - /* 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); - } - - DEBUG(3,("password server %s accepted the password\n",pserver)); - -#if !KEEP_PASSWORD_SERVER_OPEN - close(password_client); password_client= -1; -#endif - - return(True); -} - - |