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e8c2eeb0d8
strchr() for the moment
(This used to be commit c2c1f2027e
)
845 lines
17 KiB
C
845 lines
17 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 2.0
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Windows NT Domain nsswitch module
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Copyright (C) Tim Potter 2000
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include "winbind_nss_config.h"
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#include "winbindd_nss.h"
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/* Prototypes from common.c */
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void init_request(struct winbindd_request *req,int rq_type);
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NSS_STATUS winbindd_request(int req_type,
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struct winbindd_request *request,
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struct winbindd_response *response);
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int write_sock(void *buffer, int count);
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int read_reply(struct winbindd_response *response);
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void free_response(struct winbindd_response *response);
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/* Allocate some space from the nss static buffer. The buffer and buflen
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are the pointers passed in by the C library to the _nss_ntdom_*
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functions. */
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static char *get_static(char **buffer, int *buflen, int len)
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{
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char *result;
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/* Error check. We return false if things aren't set up right, or
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there isn't enough buffer space left. */
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if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
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return NULL;
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}
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/* Some architectures, like Sparc, need pointers aligned on
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boundaries */
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#if _ALIGNMENT_REQUIRED
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{
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int mod = len % _MAX_ALIGNMENT;
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if(mod != 0)
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len += _MAX_ALIGNMENT - mod;
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}
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#endif
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/* Return an index into the static buffer */
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result = *buffer;
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*buffer += len;
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*buflen -= len;
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return result;
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}
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/* I've copied the strtok() replacement function next_token() from
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lib/util_str.c as I really don't want to have to link in any other
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objects if I can possibly avoid it. */
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BOOL next_token(char **ptr,char *buff,char *sep, size_t bufsize)
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{
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char *s;
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BOOL quoted;
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size_t len=1;
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if (!ptr) return(False);
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s = *ptr;
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/* default to simple separators */
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if (!sep) sep = " \t\n\r";
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/* find the first non sep char */
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while (*s && strchr(sep,*s)) s++;
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/* nothing left? */
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if (! *s) return(False);
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/* copy over the token */
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for (quoted = False; len < bufsize && *s && (quoted || !strchr(sep,*s)); s++) {
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if (*s == '\"') {
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quoted = !quoted;
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} else {
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len++;
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*buff++ = *s;
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}
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}
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*ptr = (*s) ? s+1 : s;
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*buff = 0;
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return(True);
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}
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/* Fill a pwent structure from a winbindd_response structure. We use
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the static data passed to us by libc to put strings and stuff in.
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Return NSS_STATUS_TRYAGAIN if we run out of memory. */
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static NSS_STATUS fill_pwent(struct passwd *result,
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struct winbindd_pw *pw,
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char **buffer, int *buflen)
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{
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/* User name */
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if ((result->pw_name =
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get_static(buffer, buflen, strlen(pw->pw_name) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->pw_name, pw->pw_name);
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/* Password */
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if ((result->pw_passwd =
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get_static(buffer, buflen, strlen(pw->pw_passwd) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->pw_passwd, pw->pw_passwd);
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/* [ug]id */
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result->pw_uid = pw->pw_uid;
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result->pw_gid = pw->pw_gid;
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/* GECOS */
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if ((result->pw_gecos =
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get_static(buffer, buflen, strlen(pw->pw_gecos) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->pw_gecos, pw->pw_gecos);
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/* Home directory */
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if ((result->pw_dir =
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get_static(buffer, buflen, strlen(pw->pw_dir) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->pw_dir, pw->pw_dir);
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/* Logon shell */
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if ((result->pw_shell =
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get_static(buffer, buflen, strlen(pw->pw_shell) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->pw_shell, pw->pw_shell);
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return NSS_STATUS_SUCCESS;
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}
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/* Fill a grent structure from a winbindd_response structure. We use
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the static data passed to us by libc to put strings and stuff in.
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Return NSS_STATUS_TRYAGAIN if we run out of memory. */
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static int fill_grent(struct group *result, struct winbindd_gr *gr,
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char *gr_mem, char **buffer, int *buflen)
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{
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fstring name;
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int i;
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/* Group name */
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if ((result->gr_name =
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get_static(buffer, buflen, strlen(gr->gr_name) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->gr_name, gr->gr_name);
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/* Password */
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if ((result->gr_passwd =
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get_static(buffer, buflen, strlen(gr->gr_passwd) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy(result->gr_passwd, gr->gr_passwd);
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/* gid */
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result->gr_gid = gr->gr_gid;
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/* Group membership */
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if ((gr->num_gr_mem < 0) || !gr_mem) {
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gr->num_gr_mem = 0;
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}
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if ((result->gr_mem =
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(char **)get_static(buffer, buflen, (gr->num_gr_mem + 1) *
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sizeof(char *))) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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if (gr->num_gr_mem == 0) {
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/* Group is empty */
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*(result->gr_mem) = NULL;
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return NSS_STATUS_SUCCESS;
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}
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/* Start looking at extra data */
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i = 0;
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while(next_token((char **)&gr_mem, name, ",", sizeof(fstring))) {
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/* Allocate space for member */
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if (((result->gr_mem)[i] =
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get_static(buffer, buflen, strlen(name) + 1)) == NULL) {
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/* Out of memory */
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return NSS_STATUS_TRYAGAIN;
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}
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strcpy((result->gr_mem)[i], name);
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i++;
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}
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/* Terminate list */
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(result->gr_mem)[i] = NULL;
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return NSS_STATUS_SUCCESS;
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}
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/*
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* NSS user functions
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*/
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static struct winbindd_response getpwent_response;
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static int ndx_pw_cache; /* Current index into pwd cache */
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static int num_pw_cache; /* Current size of pwd cache */
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/* Rewind "file pointer" to start of ntdom password database */
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NSS_STATUS
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_nss_winbind_setpwent(void)
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{
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#ifdef DEBUG_NSS
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fprintf(stderr, "[%5d]: setpwent\n", getpid());
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#endif
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if (num_pw_cache > 0) {
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ndx_pw_cache = num_pw_cache = 0;
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free_response(&getpwent_response);
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}
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return winbindd_request(WINBINDD_SETPWENT, NULL, NULL);
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}
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/* Close ntdom password database "file pointer" */
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NSS_STATUS
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_nss_winbind_endpwent(void)
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{
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#ifdef DEBUG_NSS
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fprintf(stderr, "[%5d]: endpwent\n", getpid());
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#endif
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if (num_pw_cache > 0) {
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ndx_pw_cache = num_pw_cache = 0;
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free_response(&getpwent_response);
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}
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return winbindd_request(WINBINDD_ENDPWENT, NULL, NULL);
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}
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/* Fetch the next password entry from ntdom password database */
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#define MAX_GETPWENT_USERS 250
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NSS_STATUS
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_nss_winbind_getpwent_r(struct passwd *result, char *buffer,
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size_t buflen, int *errnop)
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{
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NSS_STATUS ret;
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struct winbindd_request request;
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static int called_again;
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#ifdef DEBUG_NSS
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fprintf(stderr, "[%5d]: getpwent\n", getpid());
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#endif
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/* Return an entry from the cache if we have one, or if we are
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called again because we exceeded our static buffer. */
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if ((ndx_pw_cache < num_pw_cache) || called_again) {
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goto return_result;
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}
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/* Else call winbindd to get a bunch of entries */
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if (num_pw_cache > 0) {
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free_response(&getpwent_response);
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}
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ZERO_STRUCT(request);
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ZERO_STRUCT(getpwent_response);
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request.data.num_entries = MAX_GETPWENT_USERS;
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ret = winbindd_request(WINBINDD_GETPWENT, &request,
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&getpwent_response);
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if (ret == NSS_STATUS_SUCCESS) {
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struct winbindd_pw *pw_cache;
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/* Fill cache */
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ndx_pw_cache = 0;
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num_pw_cache = getpwent_response.data.num_entries;
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/* Return a result */
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return_result:
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pw_cache = getpwent_response.extra_data;
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/* Check data is valid */
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if (pw_cache == NULL) {
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return NSS_STATUS_NOTFOUND;
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}
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ret = fill_pwent(result, &pw_cache[ndx_pw_cache],
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&buffer, &buflen);
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/* Out of memory - try again */
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if (ret == NSS_STATUS_TRYAGAIN) {
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called_again = True;
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*errnop = errno = ERANGE;
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return ret;
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}
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*errnop = errno = 0;
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called_again = False;
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ndx_pw_cache++;
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/* If we've finished with this lot of results free cache */
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if (ndx_pw_cache == num_pw_cache) {
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ndx_pw_cache = num_pw_cache = 0;
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free_response(&getpwent_response);
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}
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}
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return ret;
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}
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/* Return passwd struct from uid */
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NSS_STATUS
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_nss_winbind_getpwuid_r(uid_t uid, struct passwd *result, char *buffer,
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size_t buflen, int *errnop)
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{
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NSS_STATUS ret;
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static struct winbindd_response response;
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struct winbindd_request request;
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static int keep_response=0;
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/* If our static buffer needs to be expanded we are called again */
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if (!keep_response) {
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/* Call for the first time */
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ZERO_STRUCT(response);
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ZERO_STRUCT(request);
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request.data.uid = uid;
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ret = winbindd_request(WINBINDD_GETPWNAM_FROM_UID, &request,
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&response);
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if (ret == NSS_STATUS_SUCCESS) {
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ret = fill_pwent(result, &response.data.pw,
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&buffer, &buflen);
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if (ret == NSS_STATUS_TRYAGAIN) {
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keep_response = True;
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*errnop = errno = ERANGE;
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return ret;
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}
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}
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} else {
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/* We've been called again */
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ret = fill_pwent(result, &response.data.pw, &buffer, &buflen);
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if (ret == NSS_STATUS_TRYAGAIN) {
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keep_response = True;
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*errnop = errno = ERANGE;
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return ret;
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}
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keep_response = False;
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*errnop = errno = 0;
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}
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free_response(&response);
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return ret;
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}
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/* Return passwd struct from username */
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NSS_STATUS
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_nss_winbind_getpwnam_r(const char *name, struct passwd *result, char *buffer,
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size_t buflen, int *errnop)
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{
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NSS_STATUS ret;
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static struct winbindd_response response;
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struct winbindd_request request;
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static int keep_response;
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#ifdef DEBUG_NSS
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fprintf(stderr, "[%5d]: getpwnam %s\n", getpid(), name);
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#endif
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/* If our static buffer needs to be expanded we are called again */
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if (!keep_response) {
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/* Call for the first time */
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ZERO_STRUCT(response);
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ZERO_STRUCT(request);
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strncpy(request.data.username, name,
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sizeof(request.data.username) - 1);
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request.data.username
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[sizeof(request.data.username) - 1] = '\0';
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ret = winbindd_request(WINBINDD_GETPWNAM_FROM_USER, &request,
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&response);
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if (ret == NSS_STATUS_SUCCESS) {
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ret = fill_pwent(result, &response.data.pw, &buffer,
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&buflen);
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|
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if (ret == NSS_STATUS_TRYAGAIN) {
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keep_response = True;
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*errnop = errno = ERANGE;
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return ret;
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}
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}
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} else {
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/* We've been called again */
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ret = fill_pwent(result, &response.data.pw, &buffer, &buflen);
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|
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if (ret == NSS_STATUS_TRYAGAIN) {
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keep_response = True;
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*errnop = errno = ERANGE;
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return ret;
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}
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|
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keep_response = False;
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*errnop = errno = 0;
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}
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|
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free_response(&response);
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return ret;
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}
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|
|
/*
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* NSS group functions
|
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*/
|
|
|
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static struct winbindd_response getgrent_response;
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|
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static int ndx_gr_cache; /* Current index into grp cache */
|
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static int num_gr_cache; /* Current size of grp cache */
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|
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/* Rewind "file pointer" to start of ntdom group database */
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|
|
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NSS_STATUS
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_nss_winbind_setgrent(void)
|
|
{
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#ifdef DEBUG_NSS
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fprintf(stderr, "[%5d]: setgrent\n", getpid());
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#endif
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|
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if (num_gr_cache > 0) {
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ndx_gr_cache = num_gr_cache = 0;
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free_response(&getgrent_response);
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}
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return winbindd_request(WINBINDD_SETGRENT, NULL, NULL);
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}
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|
|
/* Close "file pointer" for ntdom group database */
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|
|
|
NSS_STATUS
|
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_nss_winbind_endgrent(void)
|
|
{
|
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#ifdef DEBUG_NSS
|
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fprintf(stderr, "[%5d]: endgrent\n", getpid());
|
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#endif
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|
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if (num_gr_cache > 0) {
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ndx_gr_cache = num_gr_cache = 0;
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free_response(&getgrent_response);
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}
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|
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return winbindd_request(WINBINDD_ENDGRENT, NULL, NULL);
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}
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|
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/* Get next entry from ntdom group database */
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|
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#define MAX_GETGRENT_USERS 250
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|
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NSS_STATUS
|
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_nss_winbind_getgrent_r(struct group *result,
|
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char *buffer, size_t buflen, int *errnop)
|
|
{
|
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NSS_STATUS ret;
|
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static struct winbindd_request request;
|
|
static int called_again;
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|
|
|
#ifdef DEBUG_NSS
|
|
fprintf(stderr, "[%5d]: getgrent\n", getpid());
|
|
#endif
|
|
|
|
/* Return an entry from the cache if we have one, or if we are
|
|
called again because we exceeded our static buffer. */
|
|
|
|
if ((ndx_gr_cache < num_gr_cache) || called_again) {
|
|
goto return_result;
|
|
}
|
|
|
|
/* Else call winbindd to get a bunch of entries */
|
|
|
|
if (num_gr_cache > 0) {
|
|
free_response(&getgrent_response);
|
|
}
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(getgrent_response);
|
|
|
|
request.data.num_entries = MAX_GETGRENT_USERS;
|
|
|
|
ret = winbindd_request(WINBINDD_GETGRENT, &request,
|
|
&getgrent_response);
|
|
|
|
if (ret == NSS_STATUS_SUCCESS) {
|
|
struct winbindd_gr *gr_cache;
|
|
int mem_ofs;
|
|
|
|
/* Fill cache */
|
|
|
|
ndx_gr_cache = 0;
|
|
num_gr_cache = getgrent_response.data.num_entries;
|
|
|
|
/* Return a result */
|
|
|
|
return_result:
|
|
|
|
gr_cache = getgrent_response.extra_data;
|
|
|
|
/* Check data is valid */
|
|
|
|
if (gr_cache == NULL) {
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
/* Fill group membership. The offset into the extra data
|
|
for the group membership is the reported offset plus the
|
|
size of all the winbindd_gr records returned. */
|
|
|
|
mem_ofs = gr_cache[ndx_gr_cache].gr_mem_ofs +
|
|
num_gr_cache * sizeof(struct winbindd_gr);
|
|
|
|
ret = fill_grent(result, &gr_cache[ndx_gr_cache],
|
|
((char *)getgrent_response.extra_data)+mem_ofs,
|
|
&buffer, &buflen);
|
|
|
|
/* Out of memory - try again */
|
|
|
|
if (ret == NSS_STATUS_TRYAGAIN) {
|
|
called_again = True;
|
|
*errnop = errno = ERANGE;
|
|
return ret;
|
|
}
|
|
|
|
*errnop = 0;
|
|
called_again = False;
|
|
ndx_gr_cache++;
|
|
|
|
/* If we've finished with this lot of results free cache */
|
|
|
|
if (ndx_gr_cache == num_gr_cache) {
|
|
ndx_gr_cache = num_gr_cache = 0;
|
|
free_response(&getgrent_response);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Return group struct from group name */
|
|
|
|
NSS_STATUS
|
|
_nss_winbind_getgrnam_r(const char *name,
|
|
struct group *result, char *buffer,
|
|
size_t buflen, int *errnop)
|
|
{
|
|
NSS_STATUS ret;
|
|
static struct winbindd_response response;
|
|
struct winbindd_request request;
|
|
static int keep_response;
|
|
|
|
#ifdef DEBUG_NSS
|
|
fprintf(stderr, "[%5d]: getgrnam %s\n", getpid(), name);
|
|
#endif
|
|
|
|
/* If our static buffer needs to be expanded we are called again */
|
|
|
|
if (!keep_response) {
|
|
|
|
/* Call for the first time */
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
strncpy(request.data.groupname, name,
|
|
sizeof(request.data.groupname));
|
|
request.data.groupname
|
|
[sizeof(request.data.groupname) - 1] = '\0';
|
|
|
|
ret = winbindd_request(WINBINDD_GETGRNAM_FROM_GROUP,
|
|
&request, &response);
|
|
|
|
if (ret == NSS_STATUS_SUCCESS) {
|
|
ret = fill_grent(result, &response.data.gr,
|
|
response.extra_data,
|
|
&buffer, &buflen);
|
|
|
|
if (ret == NSS_STATUS_TRYAGAIN) {
|
|
keep_response = True;
|
|
*errnop = errno = ERANGE;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
|
|
/* We've been called again */
|
|
|
|
ret = fill_grent(result, &response.data.gr,
|
|
response.extra_data, &buffer, &buflen);
|
|
|
|
if (ret == NSS_STATUS_TRYAGAIN) {
|
|
keep_response = True;
|
|
*errnop = errno = ERANGE;
|
|
return ret;
|
|
}
|
|
|
|
keep_response = False;
|
|
*errnop = 0;
|
|
}
|
|
|
|
free_response(&response);
|
|
return ret;
|
|
}
|
|
|
|
/* Return group struct from gid */
|
|
|
|
NSS_STATUS
|
|
_nss_winbind_getgrgid_r(gid_t gid,
|
|
struct group *result, char *buffer,
|
|
size_t buflen, int *errnop)
|
|
{
|
|
NSS_STATUS ret;
|
|
static struct winbindd_response response;
|
|
struct winbindd_request request;
|
|
static int keep_response;
|
|
|
|
#ifdef DEBUG_NSS
|
|
fprintf(stderr, "[%5d]: getgrgid %d\n", getpid(), gid);
|
|
#endif
|
|
|
|
/* If our static buffer needs to be expanded we are called again */
|
|
|
|
if (!keep_response) {
|
|
|
|
/* Call for the first time */
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
request.data.gid = gid;
|
|
|
|
ret = winbindd_request(WINBINDD_GETGRNAM_FROM_GID, &request,
|
|
&response);
|
|
|
|
if (ret == NSS_STATUS_SUCCESS) {
|
|
|
|
ret = fill_grent(result, &response.data.gr,
|
|
response.extra_data,
|
|
&buffer, &buflen);
|
|
|
|
if (ret == NSS_STATUS_TRYAGAIN) {
|
|
keep_response = True;
|
|
*errnop = errno = ERANGE;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
} else {
|
|
|
|
/* We've been called again */
|
|
|
|
ret = fill_grent(result, &response.data.gr,
|
|
response.extra_data, &buffer, &buflen);
|
|
|
|
if (ret == NSS_STATUS_TRYAGAIN) {
|
|
keep_response = True;
|
|
*errnop = errno = ERANGE;
|
|
return ret;
|
|
}
|
|
|
|
keep_response = False;
|
|
*errnop = 0;
|
|
}
|
|
|
|
free_response(&response);
|
|
return ret;
|
|
}
|
|
|
|
/* Initialise supplementary groups */
|
|
|
|
NSS_STATUS
|
|
_nss_winbind_initgroups(char *user, gid_t group, long int *start,
|
|
long int *size, gid_t *groups, long int limit,
|
|
int *errnop)
|
|
{
|
|
NSS_STATUS ret;
|
|
struct winbindd_request request;
|
|
struct winbindd_response response;
|
|
int i;
|
|
|
|
#ifdef DEBUG_NSS
|
|
fprintf(stderr, "[%5d]: initgroups %s (%d)\n", getpid(),
|
|
user, group);
|
|
#endif
|
|
|
|
ZERO_STRUCT(request);
|
|
ZERO_STRUCT(response);
|
|
|
|
strncpy(request.data.username, user,
|
|
sizeof(request.data.username) - 1);
|
|
|
|
ret = winbindd_request(WINBINDD_GETGROUPS, &request, &response);
|
|
|
|
if (ret == NSS_STATUS_SUCCESS) {
|
|
int num_gids = response.data.num_entries;
|
|
gid_t *gid_list = (gid_t *)response.extra_data;
|
|
|
|
/* Copy group list to client */
|
|
|
|
for (i = 0; i < num_gids; i++) {
|
|
|
|
/* Skip primary group */
|
|
|
|
if (gid_list[i] == group) continue;
|
|
|
|
/* Add to buffer */
|
|
|
|
if (*start == *size && limit <= 0) {
|
|
groups = realloc(
|
|
groups, 2 * (*size) * sizeof(*groups));
|
|
if (!groups) goto done;
|
|
*size *= 2;
|
|
}
|
|
|
|
groups[*start] = gid_list[i];
|
|
*start += 1;
|
|
|
|
/* Filled buffer? */
|
|
|
|
if (*start == limit) goto done;
|
|
}
|
|
}
|
|
|
|
/* Back to your regularly scheduled programming */
|
|
|
|
done:
|
|
return ret;
|
|
}
|