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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
/* internal functions */
-static struct passwd *uname_string_combinations(char *s, struct passwd * (*fn) (const char *), int N);
-static struct passwd *uname_string_combinations2(char *s, int offset, struct passwd * (*fn) (const char *), int N);
-
-/*****************************************************************
- Check if a user or group name is local (this is a *local* name for
- *local* people, there's nothing for you here...).
-*****************************************************************/
-
-static BOOL name_is_local(const char *name)
-{
- return !(strchr_m(name, *lp_winbind_separator()));
-}
-
-/*****************************************************************
- Splits passed user or group name to domain and user/group name parts
- Returns True if name was splitted and False otherwise.
-*****************************************************************/
-
-BOOL split_domain_and_name(const char *name, char *domain, char* username)
-{
- char *p = strchr(name,*lp_winbind_separator());
-
-
- /* Parse a string of the form DOMAIN/user into a domain and a user */
- DEBUG(10,("split_domain_and_name: checking whether name |%s| local or not\n", name));
-
- if (p) {
- fstrcpy(username, p+1);
- fstrcpy(domain, name);
- domain[PTR_DIFF(p, name)] = 0;
- } else if (lp_winbind_use_default_domain()) {
- fstrcpy(username, name);
- fstrcpy(domain, lp_workgroup());
- } else {
- return False;
- }
-
- DEBUG(10,("split_domain_and_name: all is fine, domain is |%s| and name is |%s|\n", domain, username));
- return True;
-}
+static struct passwd *uname_string_combinations(char *s, TALLOC_CTX *mem_ctx,
+ struct passwd * (*fn) (TALLOC_CTX *mem_ctx, const char *),
+ int N);
+static struct passwd *uname_string_combinations2(char *s, TALLOC_CTX *mem_ctx, int offset,
+ struct passwd * (*fn) (TALLOC_CTX *mem_ctx, const char *),
+ int N);
/****************************************************************************
Get a users home directory.
****************************************************************************/
-char *get_user_home_dir(const char *user)
+char *get_user_home_dir(TALLOC_CTX *mem_ctx, const char *user)
{
- static struct passwd *pass;
+ struct passwd *pass;
+ char *result;
/* Ensure the user exists. */
- pass = Get_Pwnam(user);
+ pass = Get_Pwnam_alloc(mem_ctx, user);
if (!pass)
return(NULL);
- /* Return home directory from struct passwd. */
- return(pass->pw_dir);
-}
-
-/*******************************************************************
- Map a username from a dos name to a unix name by looking in the username
- map. Note that this modifies the name in place.
- This is the main function that should be called *once* on
- any incoming or new username - in order to canonicalize the name.
- This is being done to de-couple the case conversions from the user mapping
- function. Previously, the map_username was being called
- every time Get_Pwnam was called.
- Returns True if username was changed, false otherwise.
-********************************************************************/
-
-BOOL map_username(char *user)
-{
- static BOOL initialised=False;
- static fstring last_from,last_to;
- XFILE *f;
- char *mapfile = lp_username_map();
- char *s;
- pstring buf;
- BOOL mapped_user = False;
-
- if (!*user)
- return False;
-
- if (!*mapfile)
- return False;
-
- if (!initialised) {
- *last_from = *last_to = 0;
- initialised = True;
- }
-
- if (strequal(user,last_to))
- return False;
-
- if (strequal(user,last_from)) {
- DEBUG(3,("Mapped user %s to %s\n",user,last_to));
- fstrcpy(user,last_to);
- return True;
- }
-
- f = x_fopen(mapfile,O_RDONLY, 0);
- if (!f) {
- DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
- return False;
- }
-
- DEBUG(4,("Scanning username map %s\n",mapfile));
-
- while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
- char *unixname = s;
- char *dosname = strchr_m(unixname,'=');
- char **dosuserlist;
- BOOL return_if_mapped = False;
-
- if (!dosname)
- continue;
-
- *dosname++ = 0;
-
- while (isspace((int)*unixname))
- unixname++;
-
- if ('!' == *unixname) {
- return_if_mapped = True;
- unixname++;
- while (*unixname && isspace((int)*unixname))
- unixname++;
- }
-
- if (!*unixname || strchr_m("#;",*unixname))
- continue;
-
- {
- int l = strlen(unixname);
- while (l && isspace((int)unixname[l-1])) {
- unixname[l-1] = 0;
- l--;
- }
- }
-
- dosuserlist = str_list_make(dosname, NULL);
- if (!dosuserlist) {
- DEBUG(0,("Unable to build user list\n"));
- return False;
- }
-
- if (strchr_m(dosname,'*') || user_in_list(user, (const char **)dosuserlist, NULL, 0)) {
- DEBUG(3,("Mapped user %s to %s\n",user,unixname));
- mapped_user = True;
- fstrcpy(last_from,user);
- sscanf(unixname,"%s",user);
- fstrcpy(last_to,user);
- if(return_if_mapped) {
- str_list_free (&dosuserlist);
- x_fclose(f);
- return True;
- }
- }
-
- str_list_free (&dosuserlist);
- }
-
- x_fclose(f);
+ /* Return home directory from struct passwd. */
- /*
- * Setup the last_from and last_to as an optimization so
- * that we don't scan the file again for the same user.
- */
- fstrcpy(last_from,user);
- fstrcpy(last_to,user);
+ result = talloc_move(mem_ctx, &pass->pw_dir);
- return mapped_user;
+ TALLOC_FREE(pass);
+ return result;
}
/****************************************************************************
* - using lp_usernamelevel() for permutations.
****************************************************************************/
-static struct passwd *Get_Pwnam_ret = NULL;
-
-static struct passwd *Get_Pwnam_internals(const char *user, char *user2)
+static struct passwd *Get_Pwnam_internals(TALLOC_CTX *mem_ctx,
+ const char *user, char *user2)
{
struct passwd *ret = NULL;
/* Try in all lower case first as this is the most
common case on UNIX systems */
- strlower(user2);
+ strlower_m(user2);
DEBUG(5,("Trying _Get_Pwnam(), username as lowercase is %s\n",user2));
- ret = getpwnam_alloc(user2);
+ ret = getpwnam_alloc(mem_ctx, user2);
if(ret)
goto done;
/* Try as given, if username wasn't originally lowercase */
if(strcmp(user, user2) != 0) {
- DEBUG(5,("Trying _Get_Pwnam(), username as given is %s\n", user));
- ret = getpwnam_alloc(user);
+ DEBUG(5,("Trying _Get_Pwnam(), username as given is %s\n",
+ user));
+ ret = getpwnam_alloc(mem_ctx, user);
if(ret)
goto done;
}
/* Try as uppercase, if username wasn't originally uppercase */
- strupper(user2);
+ strupper_m(user2);
if(strcmp(user, user2) != 0) {
- DEBUG(5,("Trying _Get_Pwnam(), username as uppercase is %s\n", user2));
- ret = getpwnam_alloc(user2);
+ DEBUG(5,("Trying _Get_Pwnam(), username as uppercase is %s\n",
+ user2));
+ ret = getpwnam_alloc(mem_ctx, user2);
if(ret)
goto done;
}
/* Try all combinations up to usernamelevel */
- strlower(user2);
- DEBUG(5,("Checking combinations of %d uppercase letters in %s\n", lp_usernamelevel(), user2));
- ret = uname_string_combinations(user2, getpwnam_alloc, lp_usernamelevel());
+ strlower_m(user2);
+ DEBUG(5,("Checking combinations of %d uppercase letters in %s\n",
+ lp_usernamelevel(), user2));
+ ret = uname_string_combinations(user2, mem_ctx, getpwnam_alloc,
+ lp_usernamelevel());
done:
- DEBUG(5,("Get_Pwnam_internals %s find user [%s]!\n",ret ? "did":"didn't", user));
-
- /* This call used to just return the 'passwd' static buffer.
- This could then have accidental reuse implications, so
- we now malloc a copy, and free it in the next use.
-
- This should cause the (ab)user to segfault if it
- uses an old struct.
-
- This is better than useing the wrong data in security
- critical operations.
-
- The real fix is to make the callers free the returned
- malloc'ed data.
- */
-
- if (Get_Pwnam_ret) {
- passwd_free(&Get_Pwnam_ret);
- }
-
- Get_Pwnam_ret = ret;
+ DEBUG(5,("Get_Pwnam_internals %s find user [%s]!\n",ret ?
+ "did":"didn't", user));
return ret;
}
/****************************************************************************
Get_Pwnam wrapper without modification.
NOTE: This with NOT modify 'user'!
+ This will return an allocated structure
****************************************************************************/
-struct passwd *Get_Pwnam(const char *user)
+struct passwd *Get_Pwnam_alloc(TALLOC_CTX *mem_ctx, const char *user)
{
fstring user2;
struct passwd *ret;
+ if ( *user == '\0' ) {
+ DEBUG(10,("Get_Pwnam: empty username!\n"));
+ return NULL;
+ }
+
fstrcpy(user2, user);
DEBUG(5,("Finding user %s\n", user));
- ret = Get_Pwnam_internals(user, user2);
+ ret = Get_Pwnam_internals(mem_ctx, user, user2);
return ret;
}
-/****************************************************************************
- Check if a user is in a netgroup user list.
-****************************************************************************/
-
-static BOOL user_in_netgroup_list(const char *user, const char *ngname)
-{
-#ifdef HAVE_NETGROUP
- static char *mydomain = NULL;
- if (mydomain == NULL)
- yp_get_default_domain(&mydomain);
-
- if(mydomain == NULL) {
- DEBUG(5,("Unable to get default yp domain\n"));
- return False;
- }
-
- DEBUG(5,("looking for user %s of domain %s in netgroup %s\n",
- user, mydomain, ngname));
- DEBUG(5,("innetgr is %s\n", innetgr(ngname, NULL, user, mydomain)
- ? "TRUE" : "FALSE"));
-
- if (innetgr(ngname, NULL, user, mydomain))
- return (True);
-#endif /* HAVE_NETGROUP */
- return False;
-}
-
-/****************************************************************************
- Check if a user is in a winbind group.
-****************************************************************************/
-
-static BOOL user_in_winbind_group_list(const char *user, const char *gname, BOOL *winbind_answered)
-{
- int num_groups;
- int i;
- gid_t *groups = NULL;
- gid_t gid, gid_low, gid_high;
- BOOL ret = False;
-
- *winbind_answered = False;
-
- if ((gid = nametogid(gname)) == (gid_t)-1) {
- DEBUG(0,("user_in_winbind_group_list: nametogid for group %s failed.\n",
- gname ));
- goto err;
- }
-
- if (!lp_winbind_gid(&gid_low, &gid_high)) {
- DEBUG(4, ("winbind gid range not configured, therefore %s cannot be a winbind group\n", gname));
- goto err;
- }
-
- if (gid < gid_low || gid > gid_high) {
- DEBUG(4, ("group %s is not a winbind group\n", gname));
- goto err;
- }
-
- /*
- * Get the gid's that this user belongs to.
- */
-
- if ((num_groups = winbind_getgroups(user, 0, NULL)) == -1)
- return False;
-
- if (num_groups == 0) {
- *winbind_answered = True;
- return False;
- }
-
- if ((groups = (gid_t *)malloc(sizeof(gid_t) * num_groups )) == NULL) {
- DEBUG(0,("user_in_winbind_group_list: malloc fail.\n"));
- goto err;
- }
-
- if ((num_groups = winbind_getgroups(user, num_groups, groups)) == -1) {
- DEBUG(0,("user_in_winbind_group_list: second winbind_getgroups call \
-failed with error %s\n", strerror(errno) ));
- goto err;
- }
-
- /*
- * Now we have the gid list for this user - convert the gname
- * to a gid_t via either winbind or the local UNIX lookup and do the comparison.
- */
-
- for (i = 0; i < num_groups; i++) {
- if (gid == groups[i]) {
- ret = True;
- break;
- }
- }
-
- *winbind_answered = True;
- SAFE_FREE(groups);
- return ret;
-
- err:
-
- *winbind_answered = False;
- SAFE_FREE(groups);
- return False;
-}
-
-/****************************************************************************
- Check if a user is in a UNIX group.
-****************************************************************************/
-
-BOOL user_in_unix_group_list(const char *user,const char *gname)
-{
- struct passwd *pass = Get_Pwnam(user);
- struct sys_userlist *user_list;
- struct sys_userlist *member;
-
- DEBUG(10,("user_in_unix_group_list: checking user %s in group %s\n", user, gname));
-
- /*
- * We need to check the users primary group as this
- * group is implicit and often not listed in the group database.
- */
-
- if (pass) {
- if (strequal(gname,gidtoname(pass->pw_gid))) {
- DEBUG(10,("user_in_unix_group_list: group %s is primary group.\n", gname ));
- return True;
- }
- }
-
- user_list = get_users_in_group(gname);
- if (user_list == NULL) {
- DEBUG(10,("user_in_unix_group_list: no such group %s\n", gname ));
- return False;
- }
-
- for (member = user_list; member; member = member->next) {
- DEBUG(10,("user_in_unix_group_list: checking user %s against member %s\n",
- user, member->unix_name ));
- if (strequal(member->unix_name,user)) {
- free_userlist(user_list);
- return(True);
- }
- }
-
- free_userlist(user_list);
- return False;
-}
-
-/****************************************************************************
- Check if a user is in a group list. Ask winbind first, then use UNIX.
-****************************************************************************/
-
-BOOL user_in_group_list(const char *user, const char *gname, gid_t *groups, size_t n_groups)
-{
- BOOL winbind_answered = False;
- BOOL ret;
- gid_t gid;
- unsigned i;
-
- gid = nametogid(gname);
- if (gid == (gid_t)-1)
- return False;
-
- if (groups && n_groups > 0) {
- for (i=0; i < n_groups; i++) {
- if (groups[i] == gid) {
- return True;
- }
- }
- return False;
- }
-
- /* fallback if we don't yet have the group list */
-
- ret = user_in_winbind_group_list(user, gname, &winbind_answered);
- if (!winbind_answered)
- ret = user_in_unix_group_list(user, gname);
-
- if (ret)
- DEBUG(10,("user_in_group_list: user |%s| is in group |%s|\n", user, gname));
- return ret;
-}
-
-/****************************************************************************
- Check if a user is in a user list - can check combinations of UNIX
- and netgroup lists.
-****************************************************************************/
-
-BOOL user_in_list(const char *user,const char **list, gid_t *groups, size_t n_groups)
-{
- if (!list || !*list)
- return False;
-
- DEBUG(10,("user_in_list: checking user %s in list\n", user));
-
- while (*list) {
-
- DEBUG(10,("user_in_list: checking user |%s| against |%s|\n", user, *list));
-
- /*
- * Check raw username.
- */
- if (strequal(user, *list))
- return(True);
-
- /*
- * Now check to see if any combination
- * of UNIX and netgroups has been specified.
- */
-
- if(**list == '@') {
- /*
- * Old behaviour. Check netgroup list
- * followed by UNIX list.
- */
- if(user_in_netgroup_list(user, *list +1))
- return True;
- if(user_in_group_list(user, *list +1, groups, n_groups))
- return True;
- } else if (**list == '+') {
-
- if((*(*list +1)) == '&') {
- /*
- * Search UNIX list followed by netgroup.
- */
- if(user_in_group_list(user, *list +2, groups, n_groups))
- return True;
- if(user_in_netgroup_list(user, *list +2))
- return True;
-
- } else {
-
- /*
- * Just search UNIX list.
- */
-
- if(user_in_group_list(user, *list +1, groups, n_groups))
- return True;
- }
-
- } else if (**list == '&') {
-
- if(*(*list +1) == '+') {
- /*
- * Search netgroup list followed by UNIX list.
- */
- if(user_in_netgroup_list(user, *list +2))
- return True;
- if(user_in_group_list(user, *list +2, groups, n_groups))
- return True;
- } else {
- /*
- * Just search netgroup list.
- */
- if(user_in_netgroup_list(user, *list +1))
- return True;
- }
- } else if (!name_is_local(*list)) {
- /*
- * If user name did not match and token is not
- * a unix group and the token has a winbind separator in the
- * name then see if it is a Windows group.
- */
-
- DOM_SID g_sid;
- enum SID_NAME_USE name_type;
- BOOL winbind_answered = False;
- BOOL ret;
- fstring groupname, domain;
-
- /* Parse a string of the form DOMAIN/user into a domain and a user */
-
- char *p = strchr(*list,*lp_winbind_separator());
-
- DEBUG(10,("user_in_list: checking if user |%s| is in winbind group |%s|\n", user, *list));
-
- if (p) {
- fstrcpy(groupname, p+1);
- fstrcpy(domain, *list);
- domain[PTR_DIFF(p, *list)] = 0;
-
- /* Check to see if name is a Windows group */
- if (winbind_lookup_name(domain, groupname, &g_sid, &name_type) && name_type == SID_NAME_DOM_GRP) {
-
- /* Check if user name is in the Windows group */
- ret = user_in_winbind_group_list(user, *list, &winbind_answered);
-
- if (winbind_answered && ret == True) {
- DEBUG(10,("user_in_list: user |%s| is in winbind group |%s|\n", user, *list));
- return ret;
- }
- }
- }
- }
-
- list++;
- }
- return(False);
-}
-
/* The functions below have been taken from password.c and slightly modified */
/****************************************************************************
Apply a function to upper/lower case combinations
it assumes the string starts lowercased
****************************************************************************/
-static struct passwd *uname_string_combinations2(char *s,int offset,struct passwd *(*fn)(const char *),int N)
+static struct passwd *uname_string_combinations2(char *s, TALLOC_CTX *mem_ctx,
+ int offset,
+ struct passwd *(*fn)(TALLOC_CTX *mem_ctx, const char *),
+ int N)
{
ssize_t len = (ssize_t)strlen(s);
int i;
struct passwd *ret;
if (N <= 0 || offset >= len)
- return(fn(s));
+ return(fn(mem_ctx, s));
for (i=offset;i<(len-(N-1));i++) {
char c = s[i];
- if (!islower((int)c))
+ if (!islower_ascii((int)c))
continue;
- s[i] = toupper(c);
- ret = uname_string_combinations2(s,i+1,fn,N-1);
+ s[i] = toupper_ascii(c);
+ ret = uname_string_combinations2(s, mem_ctx, i+1, fn, N-1);
if(ret)
return(ret);
s[i] = c;
it assumes the string starts lowercased
****************************************************************************/
-static struct passwd * uname_string_combinations(char *s,struct passwd * (*fn)(const char *),int N)
+static struct passwd * uname_string_combinations(char *s, TALLOC_CTX *mem_ctx,
+ struct passwd * (*fn)(TALLOC_CTX *mem_ctx, const char *),
+ int N)
{
int n;
struct passwd *ret;
for (n=1;n<=N;n++) {
- ret = uname_string_combinations2(s,0,fn,n);
+ ret = uname_string_combinations2(s,mem_ctx,0,fn,n);
if(ret)
return(ret);
}
git.samba.org / jra / samba / .git / blobdiff