winbindd_user.c

来自「samba-3.0.22.tar.gz 编译smb服务器的源码」· C语言 代码 · 共 820 行 · 第 1/2 页

/* 
   Unix SMB/CIFS implementation.

   Winbind daemon - user related functions

   Copyright (C) Tim Potter 2000
   Copyright (C) Jeremy Allison 2001.
   Copyright (C) Gerald (Jerry) Carter 2003.
   
   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"
#include "winbindd.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

extern userdom_struct current_user_info;

static BOOL fillup_pw_field(const char *lp_template, 
			    const char *username, 
			    const char *domname,
			    uid_t uid,
			    gid_t gid,
			    const char *in, 
			    fstring out)
{
	char *templ;

	if (out == NULL)
		return False;

	if (in && !strequal(in,"") && lp_security() == SEC_ADS && use_nss_info("sfu")) {
		safe_strcpy(out, in, sizeof(fstring) - 1);
		return True;
	}

	/* Home directory and shell - use template config parameters.  The
	   defaults are /tmp for the home directory and /bin/false for
	   shell. */
	
	/* The substitution of %U and %D in the 'template homedir' is done
	   by alloc_sub_specified() below. */

	templ = alloc_sub_specified(lp_template, username, domname, uid, gid);
		
	if (!templ)
		return False;

	safe_strcpy(out, templ, sizeof(fstring) - 1);
	SAFE_FREE(templ);
		
	return True;
	
}
/* Fill a pwent structure with information we have obtained */

static BOOL winbindd_fill_pwent(char *dom_name, char *user_name, 
				DOM_SID *user_sid, DOM_SID *group_sid,
				char *full_name, char *homedir, char *shell,
				struct winbindd_pw *pw)
{
	fstring output_username;
	fstring sid_string;
	
	if (!pw || !dom_name || !user_name)
		return False;
	
	/* Resolve the uid number */

	if (!NT_STATUS_IS_OK(idmap_sid_to_uid(user_sid, &pw->pw_uid, 0))) {
		DEBUG(1, ("error getting user id for sid %s\n", sid_to_string(sid_string, user_sid)));
		return False;
	}
	
	/* Resolve the gid number */   

	if (!NT_STATUS_IS_OK(idmap_sid_to_gid(group_sid, &pw->pw_gid, 0))) {
		DEBUG(1, ("error getting group id for sid %s\n", sid_to_string(sid_string, group_sid)));
		return False;
	}

	strlower_m(user_name);

	/* Username */

	fill_domain_username(output_username, dom_name, user_name); 

	safe_strcpy(pw->pw_name, output_username, sizeof(pw->pw_name) - 1);
	
	/* Full name (gecos) */
	
	safe_strcpy(pw->pw_gecos, full_name, sizeof(pw->pw_gecos) - 1);

	/* Home directory and shell - use template config parameters.  The
	   defaults are /tmp for the home directory and /bin/false for
	   shell. */
	
	/* The substitution of %U and %D in the 'template homedir' is done
	   by alloc_sub_specified() below. */

	fstrcpy(current_user_info.domain, dom_name);

	if (!fillup_pw_field(lp_template_homedir(), user_name, dom_name, 
			     pw->pw_uid, pw->pw_gid, homedir, pw->pw_dir))
		return False;

	if (!fillup_pw_field(lp_template_shell(), user_name, dom_name, 
			     pw->pw_uid, pw->pw_gid, shell, pw->pw_shell))
		return False;

	/* Password - set to "x" as we can't generate anything useful here.
	   Authentication can be done using the pam_winbind module. */

	safe_strcpy(pw->pw_passwd, "x", sizeof(pw->pw_passwd) - 1);

	return True;
}

/* Wrapper for domain->methods->query_user, only on the parent->child pipe */

enum winbindd_result winbindd_dual_userinfo(struct winbindd_domain *domain,
					    struct winbindd_cli_state *state)
{
	DOM_SID sid;
	WINBIND_USERINFO user_info;
	NTSTATUS status;

	/* Ensure null termination */
	state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';

	DEBUG(3, ("[%5lu]: lookupsid %s\n", (unsigned long)state->pid, 
		  state->request.data.sid));

	if (!string_to_sid(&sid, state->request.data.sid)) {
		DEBUG(5, ("%s not a SID\n", state->request.data.sid));
		return WINBINDD_ERROR;
	}

	status = domain->methods->query_user(domain, state->mem_ctx,
					     &sid, &user_info);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(1, ("error getting user info for sid %s\n",
			  sid_string_static(&sid)));
		return WINBINDD_ERROR;
	}

	fstrcpy(state->response.data.user_info.acct_name, user_info.acct_name);
	fstrcpy(state->response.data.user_info.full_name, user_info.full_name);
	fstrcpy(state->response.data.user_info.homedir, user_info.homedir);
	fstrcpy(state->response.data.user_info.shell, user_info.shell);
	if (!sid_peek_check_rid(&domain->sid, &user_info.group_sid,
				&state->response.data.user_info.group_rid)) {
		DEBUG(1, ("Could not extract group rid out of %s\n",
			  sid_string_static(&sid)));
		return WINBINDD_ERROR;
	}

	return WINBINDD_OK;
}

struct getpwsid_state {
	struct winbindd_cli_state *state;
	struct winbindd_domain *domain;
	char *username;
	char *fullname;
	char *homedir;
	char *shell;
	DOM_SID user_sid;
	uid_t uid;
	DOM_SID group_sid;
	gid_t gid;
};

static void getpwsid_queryuser_recv(void *private_data, BOOL success,
				    const char *acct_name,
				    const char *full_name, 
				    const char *homedir,
				    const char *shell,
				    uint32 group_rid);
static void getpwsid_sid2uid_recv(void *private_data, BOOL success, uid_t uid);
static void getpwsid_sid2gid_recv(void *private_data, BOOL success, gid_t gid);

static void winbindd_getpwsid(struct winbindd_cli_state *state,
			      const DOM_SID *sid)
{
	struct getpwsid_state *s;

	s = TALLOC_P(state->mem_ctx, struct getpwsid_state);
	if (s == NULL) {
		DEBUG(0, ("talloc failed\n"));
		goto error;
	}

	s->state = state;
	s->domain = find_domain_from_sid_noinit(sid);
	if (s->domain == NULL) {
		DEBUG(3, ("Could not find domain for sid %s\n",
			  sid_string_static(sid)));
		goto error;
	}

	sid_copy(&s->user_sid, sid);

	query_user_async(s->state->mem_ctx, s->domain, sid,
			 getpwsid_queryuser_recv, s);
	return;

 error:
	request_error(state);
}
	
static void getpwsid_queryuser_recv(void *private_data, BOOL success,
				    const char *acct_name,
				    const char *full_name, 
				    const char *homedir,
				    const char *shell,
				    uint32 group_rid)
{
	fstring username;
	struct getpwsid_state *s =
		talloc_get_type_abort(private_data, struct getpwsid_state);

	if (!success) {
		DEBUG(5, ("Could not query user %s\\%s\n", s->domain->name,
			  s->username));
		request_error(s->state);
		return;
	}

	fstrcpy( username, acct_name );
	strlower_m( username );
	s->username = talloc_strdup(s->state->mem_ctx, username);
	s->fullname = talloc_strdup(s->state->mem_ctx, full_name);
	s->homedir = talloc_strdup(s->state->mem_ctx, homedir);
	s->shell = talloc_strdup(s->state->mem_ctx, shell);
	sid_copy(&s->group_sid, &s->domain->sid);
	sid_append_rid(&s->group_sid, group_rid);

	winbindd_sid2uid_async(s->state->mem_ctx, &s->user_sid,
			       getpwsid_sid2uid_recv, s);
}

static void getpwsid_sid2uid_recv(void *private_data, BOOL success, uid_t uid)
{
	struct getpwsid_state *s =
		talloc_get_type_abort(private_data, struct getpwsid_state);

	if (!success) {
		DEBUG(5, ("Could not query user's %s\\%s uid\n",
			  s->domain->name, s->username));
		request_error(s->state);
		return;
	}

	s->uid = uid;
	winbindd_sid2gid_async(s->state->mem_ctx, &s->group_sid,
			       getpwsid_sid2gid_recv, s);
}

static void getpwsid_sid2gid_recv(void *private_data, BOOL success, gid_t gid)
{
	struct getpwsid_state *s =
		talloc_get_type_abort(private_data, struct getpwsid_state);
	struct winbindd_pw *pw;
	fstring output_username;

	if (!success) {
		DEBUG(5, ("Could not query user's %s\\%s\n gid",
			  s->domain->name, s->username));
		goto failed;
	}

	s->gid = gid;

	pw = &s->state->response.data.pw;
	pw->pw_uid = s->uid;
	pw->pw_gid = s->gid;
	fill_domain_username(output_username, s->domain->name, s->username); 
	safe_strcpy(pw->pw_name, output_username, sizeof(pw->pw_name) - 1);
	safe_strcpy(pw->pw_gecos, s->fullname, sizeof(pw->pw_gecos) - 1);

	fstrcpy(current_user_info.domain, s->domain->name);

	if (!fillup_pw_field(lp_template_homedir(), s->username, s->domain->name, 
			     pw->pw_uid, pw->pw_gid, s->homedir, pw->pw_dir)) {
		DEBUG(5, ("Could not compose homedir\n"));
		goto failed;
	}

	if (!fillup_pw_field(lp_template_shell(), s->username, s->domain->name, 
			     pw->pw_uid, pw->pw_gid, s->shell, pw->pw_shell)) {
		DEBUG(5, ("Could not compose shell\n"));
		goto failed;
	}

	/* Password - set to "x" as we can't generate anything useful here.
	   Authentication can be done using the pam_winbind module. */

	safe_strcpy(pw->pw_passwd, "x", sizeof(pw->pw_passwd) - 1);

	request_ok(s->state);
	return;

 failed:
	request_error(s->state);
}

/* Return a password structure from a username.  */

static void getpwnam_name2sid_recv(void *private_data, BOOL success,
				   const DOM_SID *sid, enum SID_NAME_USE type);

void winbindd_getpwnam(struct winbindd_cli_state *state)
{
	struct winbindd_domain *domain;
	fstring domname, username;

	/* Ensure null termination */
	state->request.data.username[sizeof(state->request.data.username)-1]='\0';

	DEBUG(3, ("[%5lu]: getpwnam %s\n", (unsigned long)state->pid,
		  state->request.data.username));

	if (!parse_domain_user(state->request.data.username, domname,
			       username)) {
		DEBUG(0, ("Could not parse domain user: %s\n",
			  state->request.data.username));
		request_error(state);
		return;
	}
	
	/* Get info for the domain */

	domain = find_domain_from_name(domname);

	if (domain == NULL) {
		DEBUG(7, ("could not find domain entry for domain %s\n",
			  domname));
		request_error(state);
		return;
	}

	if ( strequal(domname, lp_workgroup()) && lp_winbind_trusted_domains_only() ) {
		DEBUG(7,("winbindd_getpwnam: My domain -- rejecting getpwnam() for %s\\%s.\n", 
			domname, username));
		request_error(state);
		return;
	}	

	/* Get rid and name type from name.  The following costs 1 packet */

	winbindd_lookupname_async(state->mem_ctx, domname, username,
				  getpwnam_name2sid_recv, state);
}

static void getpwnam_name2sid_recv(void *private_data, BOOL success,
				   const DOM_SID *sid, enum SID_NAME_USE type)
{
	struct winbindd_cli_state *state = private_data;

	if (!success) {
		DEBUG(5, ("Could not lookup name for user %s\n",
			  state->request.data.username));
		request_error(state);
		return;
	}

	if ((type != SID_NAME_USER) && (type != SID_NAME_COMPUTER)) {
		DEBUG(5, ("%s is not a user\n", state->request.data.username));
		request_error(state);
		return;
	}

	winbindd_getpwsid(state, sid);
}

/* Return a password structure given a uid number */

void winbindd_getpwuid(struct winbindd_cli_state *state)
{
	DOM_SID user_sid;
	NTSTATUS status;
	
	/* Bug out if the uid isn't in the winbind range */

	if ((state->request.data.uid < server_state.uid_low ) ||
	    (state->request.data.uid > server_state.uid_high)) {
		request_error(state);
		return;
	}

	DEBUG(3, ("[%5lu]: getpwuid %lu\n", (unsigned long)state->pid, 
		  (unsigned long)state->request.data.uid));

	status = idmap_uid_to_sid(&user_sid, state->request.data.uid,
				  ID_QUERY_ONLY | ID_CACHE_ONLY);