1
0
mirror of https://github.com/samba-team/samba.git synced 2025-01-27 14:04:05 +03:00
samba-mirror/source3/services/services_db.c
Volker Lendecke 2b7fca9e79 Revert "Fix a memleak in svcctl_init_keys()"
This reverts commit b1afb31f3cadd4749bf6e3eb5d8935588bf8ebfc.

This one is very strange: I need to investigate why valgrind showed it as
leaking, and why in my initial tests this did not fail.
(cherry picked from commit 24730f5981efb920811e7929a9483bd72bb0984c)
(This used to be commit b1e8e5d173cdaa3fb9c1fb1d9aacf8e665bc5d61)
2008-06-18 16:31:35 +02:00

747 lines
21 KiB
C

/*
* Unix SMB/CIFS implementation.
* Service Control API Implementation
*
* Copyright (C) Marcin Krzysztof Porwit 2005.
* Largely Rewritten by:
* Copyright (C) Gerald (Jerry) Carter 2005.
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
struct rcinit_file_information {
char *description;
};
struct service_display_info {
const char *servicename;
const char *daemon;
const char *dispname;
const char *description;
};
struct service_display_info builtin_svcs[] = {
{ "Spooler", "smbd", "Print Spooler", "Internal service for spooling files to print devices" },
{ "NETLOGON", "smbd", "Net Logon", "File service providing access to policy and profile data (not remotely manageable)" },
{ "RemoteRegistry", "smbd", "Remote Registry Service", "Internal service providing remote access to "
"the Samba registry" },
{ "WINS", "nmbd", "Windows Internet Name Service (WINS)", "Internal service providing a "
"NetBIOS point-to-point name server (not remotely manageable)" },
{ NULL, NULL, NULL, NULL }
};
struct service_display_info common_unix_svcs[] = {
{ "cups", NULL, "Common Unix Printing System","Provides unified printing support for all operating systems" },
{ "postfix", NULL, "Internet Mail Service", "Provides support for sending and receiving electonic mail" },
{ "sendmail", NULL, "Internet Mail Service", "Provides support for sending and receiving electonic mail" },
{ "portmap", NULL, "TCP Port to RPC PortMapper",NULL },
{ "xinetd", NULL, "Internet Meta-Daemon", NULL },
{ "inet", NULL, "Internet Meta-Daemon", NULL },
{ "xntpd", NULL, "Network Time Service", NULL },
{ "ntpd", NULL, "Network Time Service", NULL },
{ "lpd", NULL, "BSD Print Spooler", NULL },
{ "nfsserver", NULL, "Network File Service", NULL },
{ "cron", NULL, "Scheduling Service", NULL },
{ "at", NULL, "Scheduling Service", NULL },
{ "nscd", NULL, "Name Service Cache Daemon", NULL },
{ "slapd", NULL, "LDAP Directory Service", NULL },
{ "ldap", NULL, "LDAP DIrectory Service", NULL },
{ "ypbind", NULL, "NIS Directory Service", NULL },
{ "courier-imap", NULL, "IMAP4 Mail Service", NULL },
{ "courier-pop3", NULL, "POP3 Mail Service", NULL },
{ "named", NULL, "Domain Name Service", NULL },
{ "bind", NULL, "Domain Name Service", NULL },
{ "httpd", NULL, "HTTP Server", NULL },
{ "apache", NULL, "HTTP Server", "Provides s highly scalable and flexible web server "
"capable of implementing various protocols incluing "
"but not limited to HTTP" },
{ "autofs", NULL, "Automounter", NULL },
{ "squid", NULL, "Web Cache Proxy ", NULL },
{ "perfcountd", NULL, "Performance Monitoring Daemon", NULL },
{ "pgsql", NULL, "PgSQL Database Server", "Provides service for SQL database from Postgresql.org" },
{ "arpwatch", NULL, "ARP Tables watcher", "Provides service for monitoring ARP tables for changes" },
{ "dhcpd", NULL, "DHCP Server", "Provides service for dynamic host configuration and IP assignment" },
{ "nwserv", NULL, "NetWare Server Emulator", "Provides service for emulating Novell NetWare 3.12 server" },
{ "proftpd", NULL, "Professional FTP Server", "Provides high configurable service for FTP connection and "
"file transferring" },
{ "ssh2", NULL, "SSH Secure Shell", "Provides service for secure connection for remote administration" },
{ "sshd", NULL, "SSH Secure Shell", "Provides service for secure connection for remote administration" },
{ NULL, NULL, NULL, NULL }
};
/********************************************************************
********************************************************************/
static SEC_DESC* construct_service_sd( TALLOC_CTX *ctx )
{
SEC_ACE ace[4];
SEC_ACCESS mask;
size_t i = 0;
SEC_DESC *sd;
SEC_ACL *acl;
size_t sd_size;
/* basic access for Everyone */
init_sec_access(&mask, SERVICE_READ_ACCESS );
init_sec_ace(&ace[i++], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
init_sec_access(&mask,SERVICE_EXECUTE_ACCESS );
init_sec_ace(&ace[i++], &global_sid_Builtin_Power_Users, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
init_sec_access(&mask,SERVICE_ALL_ACCESS );
init_sec_ace(&ace[i++], &global_sid_Builtin_Server_Operators, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
init_sec_ace(&ace[i++], &global_sid_Builtin_Administrators, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
/* create the security descriptor */
if ( !(acl = make_sec_acl(ctx, NT4_ACL_REVISION, i, ace)) )
return NULL;
if ( !(sd = make_sec_desc(ctx, SECURITY_DESCRIPTOR_REVISION_1,
SEC_DESC_SELF_RELATIVE, NULL, NULL, NULL,
acl, &sd_size)) )
return NULL;
return sd;
}
/********************************************************************
This is where we do the dirty work of filling in things like the
Display name, Description, etc...
********************************************************************/
static char *get_common_service_dispname( const char *servicename )
{
int i;
for ( i=0; common_unix_svcs[i].servicename; i++ ) {
if (strequal(servicename, common_unix_svcs[i].servicename)) {
char *dispname;
if (asprintf(&dispname,
"%s (%s)",
common_unix_svcs[i].dispname,
common_unix_svcs[i].servicename) < 0) {
return NULL;
}
return dispname;
}
}
return SMB_STRDUP(servicename );
}
/********************************************************************
********************************************************************/
static char *cleanup_string( const char *string )
{
char *clean = NULL;
char *begin, *end;
TALLOC_CTX *ctx = talloc_tos();
clean = talloc_strdup(ctx, string);
if (!clean) {
return NULL;
}
begin = clean;
/* trim any beginning whilespace */
while (isspace(*begin)) {
begin++;
}
if (*begin == '\0') {
return NULL;
}
/* trim any trailing whitespace or carriage returns.
Start at the end and move backwards */
end = begin + strlen(begin) - 1;
while ( isspace(*end) || *end=='\n' || *end=='\r' ) {
*end = '\0';
end--;
}
return begin;
}
/********************************************************************
********************************************************************/
static bool read_init_file( const char *servicename, struct rcinit_file_information **service_info )
{
struct rcinit_file_information *info;
char *filepath = NULL;
char str[1024];
XFILE *f;
char *p;
if ( !(info = TALLOC_ZERO_P( NULL, struct rcinit_file_information ) ) )
return False;
/* attempt the file open */
filepath = talloc_asprintf(info, "%s/%s/%s", get_dyn_LIBDIR(),
SVCCTL_SCRIPT_DIR, servicename);
if (!filepath) {
TALLOC_FREE(info);
return false;
}
if (!(f = x_fopen( filepath, O_RDONLY, 0 ))) {
DEBUG(0,("read_init_file: failed to open [%s]\n", filepath));
TALLOC_FREE(info);
return false;
}
while ( (x_fgets( str, sizeof(str)-1, f )) != NULL ) {
/* ignore everything that is not a full line
comment starting with a '#' */
if ( str[0] != '#' )
continue;
/* Look for a line like '^#.*Description:' */
if ( (p = strstr( str, "Description:" )) != NULL ) {
char *desc;
p += strlen( "Description:" ) + 1;
if ( !p )
break;
if ( (desc = cleanup_string(p)) != NULL )
info->description = talloc_strdup( info, desc );
}
}
x_fclose( f );
if ( !info->description )
info->description = talloc_strdup( info, "External Unix Service" );
*service_info = info;
TALLOC_FREE(filepath);
return True;
}
/********************************************************************
This is where we do the dirty work of filling in things like the
Display name, Description, etc...
********************************************************************/
static void fill_service_values( const char *name, REGVAL_CTR *values )
{
UNISTR2 data, dname, ipath, description;
uint32 dword;
int i;
/* These values are hardcoded in all QueryServiceConfig() replies.
I'm just storing them here for cosmetic purposes */
dword = SVCCTL_AUTO_START;
regval_ctr_addvalue( values, "Start", REG_DWORD, (char*)&dword, sizeof(uint32));
dword = SVCCTL_WIN32_OWN_PROC;
regval_ctr_addvalue( values, "Type", REG_DWORD, (char*)&dword, sizeof(uint32));
dword = SVCCTL_SVC_ERROR_NORMAL;
regval_ctr_addvalue( values, "ErrorControl", REG_DWORD, (char*)&dword, sizeof(uint32));
/* everything runs as LocalSystem */
init_unistr2( &data, "LocalSystem", UNI_STR_TERMINATE );
regval_ctr_addvalue( values, "ObjectName", REG_SZ, (char*)data.buffer, data.uni_str_len*2);
/* special considerations for internal services and the DisplayName value */
for ( i=0; builtin_svcs[i].servicename; i++ ) {
if ( strequal( name, builtin_svcs[i].servicename ) ) {
char *pstr = NULL;
if (asprintf(&pstr, "%s/%s/%s",
get_dyn_LIBDIR(), SVCCTL_SCRIPT_DIR,
builtin_svcs[i].daemon) > 0) {
init_unistr2( &ipath, pstr, UNI_STR_TERMINATE );
SAFE_FREE(pstr);
} else {
init_unistr2( &ipath, "", UNI_STR_TERMINATE );
}
init_unistr2( &description, builtin_svcs[i].description, UNI_STR_TERMINATE );
init_unistr2( &dname, builtin_svcs[i].dispname, UNI_STR_TERMINATE );
break;
}
}
/* default to an external service if we haven't found a match */
if ( builtin_svcs[i].servicename == NULL ) {
char *pstr = NULL;
char *dispname = NULL;
struct rcinit_file_information *init_info = NULL;
if (asprintf(&pstr, "%s/%s/%s",get_dyn_LIBDIR(),
SVCCTL_SCRIPT_DIR, name) > 0) {
init_unistr2( &ipath, pstr, UNI_STR_TERMINATE );
SAFE_FREE(pstr);
} else {
init_unistr2( &ipath, "", UNI_STR_TERMINATE );
}
/* lookup common unix display names */
dispname = get_common_service_dispname(name);
init_unistr2( &dname, dispname ? dispname : "", UNI_STR_TERMINATE );
SAFE_FREE(dispname);
/* get info from init file itself */
if ( read_init_file( name, &init_info ) ) {
init_unistr2( &description, init_info->description, UNI_STR_TERMINATE );
TALLOC_FREE( init_info );
}
else {
init_unistr2( &description, "External Unix Service", UNI_STR_TERMINATE );
}
}
/* add the new values */
regval_ctr_addvalue( values, "DisplayName", REG_SZ, (char*)dname.buffer, dname.uni_str_len*2);
regval_ctr_addvalue( values, "ImagePath", REG_SZ, (char*)ipath.buffer, ipath.uni_str_len*2);
regval_ctr_addvalue( values, "Description", REG_SZ, (char*)description.buffer, description.uni_str_len*2);
return;
}
/********************************************************************
********************************************************************/
static void add_new_svc_name( REGISTRY_KEY *key_parent, REGSUBKEY_CTR *subkeys,
const char *name )
{
REGISTRY_KEY *key_service, *key_secdesc;
WERROR wresult;
char *path = NULL;
REGVAL_CTR *values;
REGSUBKEY_CTR *svc_subkeys;
SEC_DESC *sd;
DATA_BLOB sd_blob;
NTSTATUS status;
/* add to the list and create the subkey path */
regsubkey_ctr_addkey( subkeys, name );
store_reg_keys( key_parent, subkeys );
/* open the new service key */
if (asprintf(&path, "%s\\%s", KEY_SERVICES, name) < 0) {
return;
}
wresult = regkey_open_internal( NULL, &key_service, path,
get_root_nt_token(), REG_KEY_ALL );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("add_new_svc_name: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
SAFE_FREE(path);
return;
}
SAFE_FREE(path);
/* add the 'Security' key */
if ( !(svc_subkeys = TALLOC_ZERO_P( key_service, REGSUBKEY_CTR )) ) {
DEBUG(0,("add_new_svc_name: talloc() failed!\n"));
TALLOC_FREE( key_service );
return;
}
fetch_reg_keys( key_service, svc_subkeys );
regsubkey_ctr_addkey( svc_subkeys, "Security" );
store_reg_keys( key_service, svc_subkeys );
/* now for the service values */
if ( !(values = TALLOC_ZERO_P( key_service, REGVAL_CTR )) ) {
DEBUG(0,("add_new_svc_name: talloc() failed!\n"));
TALLOC_FREE( key_service );
return;
}
fill_service_values( name, values );
store_reg_values( key_service, values );
/* cleanup the service key*/
TALLOC_FREE( key_service );
/* now add the security descriptor */
if (asprintf(&path, "%s\\%s\\%s", KEY_SERVICES, name, "Security") < 0) {
return;
}
wresult = regkey_open_internal( NULL, &key_secdesc, path,
get_root_nt_token(), REG_KEY_ALL );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("add_new_svc_name: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
TALLOC_FREE( key_secdesc );
SAFE_FREE(path);
return;
}
SAFE_FREE(path);
if ( !(values = TALLOC_ZERO_P( key_secdesc, REGVAL_CTR )) ) {
DEBUG(0,("add_new_svc_name: talloc() failed!\n"));
TALLOC_FREE( key_secdesc );
return;
}
if ( !(sd = construct_service_sd(key_secdesc)) ) {
DEBUG(0,("add_new_svc_name: Failed to create default sec_desc!\n"));
TALLOC_FREE( key_secdesc );
return;
}
status = marshall_sec_desc(key_secdesc, sd, &sd_blob.data,
&sd_blob.length);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("marshall_sec_desc failed: %s\n",
nt_errstr(status)));
TALLOC_FREE(key_secdesc);
return;
}
regval_ctr_addvalue(values, "Security", REG_BINARY,
(const char *)sd_blob.data, sd_blob.length);
store_reg_values( key_secdesc, values );
TALLOC_FREE( key_secdesc );
return;
}
/********************************************************************
********************************************************************/
void svcctl_init_keys( void )
{
const char **service_list = lp_svcctl_list();
int i;
REGSUBKEY_CTR *subkeys;
REGISTRY_KEY *key = NULL;
WERROR wresult;
/* bad mojo here if the lookup failed. Should not happen */
wresult = regkey_open_internal( NULL, &key, KEY_SERVICES,
get_root_nt_token(), REG_KEY_ALL );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("svcctl_init_keys: key lookup failed! (%s)\n",
dos_errstr(wresult)));
return;
}
/* lookup the available subkeys */
if ( !(subkeys = TALLOC_ZERO_P( key, REGSUBKEY_CTR )) ) {
DEBUG(0,("svcctl_init_keys: talloc() failed!\n"));
TALLOC_FREE( key );
return;
}
fetch_reg_keys( key, subkeys );
/* the builtin services exist */
for ( i=0; builtin_svcs[i].servicename; i++ )
add_new_svc_name( key, subkeys, builtin_svcs[i].servicename );
for ( i=0; service_list && service_list[i]; i++ ) {
/* only add new services */
if ( regsubkey_ctr_key_exists( subkeys, service_list[i] ) )
continue;
/* Add the new service key and initialize the appropriate values */
add_new_svc_name( key, subkeys, service_list[i] );
}
TALLOC_FREE( key );
/* initialize the control hooks */
init_service_op_table();
return;
}
/********************************************************************
This is where we do the dirty work of filling in things like the
Display name, Description, etc...Always return a default secdesc
in case of any failure.
********************************************************************/
SEC_DESC *svcctl_get_secdesc( TALLOC_CTX *ctx, const char *name, NT_USER_TOKEN *token )
{
REGISTRY_KEY *key;
REGVAL_CTR *values;
REGISTRY_VALUE *val;
SEC_DESC *ret_sd = NULL;
char *path= NULL;
WERROR wresult;
NTSTATUS status;
/* now add the security descriptor */
if (asprintf(&path, "%s\\%s\\%s", KEY_SERVICES, name, "Security") < 0) {
return NULL;
}
wresult = regkey_open_internal( NULL, &key, path, token,
REG_KEY_ALL );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("svcctl_get_secdesc: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
goto done;
}
if ( !(values = TALLOC_ZERO_P( key, REGVAL_CTR )) ) {
DEBUG(0,("svcctl_get_secdesc: talloc() failed!\n"));
goto done;
}
if (fetch_reg_values( key, values ) == -1) {
DEBUG(0, ("Error getting registry values\n"));
goto done;
}
if ( !(val = regval_ctr_getvalue( values, "Security" )) ) {
goto fallback_to_default_sd;
}
/* stream the service security descriptor */
status = unmarshall_sec_desc(ctx, regval_data_p(val),
regval_size(val), &ret_sd);
if (NT_STATUS_IS_OK(status)) {
goto done;
}
fallback_to_default_sd:
DEBUG(6, ("svcctl_get_secdesc: constructing default secdesc for "
"service [%s]\n", name));
ret_sd = construct_service_sd(ctx);
done:
SAFE_FREE(path);
TALLOC_FREE(key);
return ret_sd;
}
/********************************************************************
Wrapper to make storing a Service sd easier
********************************************************************/
bool svcctl_set_secdesc( TALLOC_CTX *ctx, const char *name, SEC_DESC *sec_desc, NT_USER_TOKEN *token )
{
REGISTRY_KEY *key;
WERROR wresult;
char *path = NULL;
REGVAL_CTR *values;
prs_struct ps;
bool ret = False;
/* now add the security descriptor */
if (asprintf(&path, "%s\\%s\\%s", KEY_SERVICES, name, "Security") < 0) {
return false;
}
wresult = regkey_open_internal( NULL, &key, path, token,
REG_KEY_ALL );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("svcctl_get_secdesc: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
SAFE_FREE(path);
return False;
}
SAFE_FREE(path);
if ( !(values = TALLOC_ZERO_P( key, REGVAL_CTR )) ) {
DEBUG(0,("svcctl_set_secdesc: talloc() failed!\n"));
TALLOC_FREE( key );
return False;
}
/* stream the printer security descriptor */
if (!prs_init( &ps, RPC_MAX_PDU_FRAG_LEN, key, MARSHALL)) {
DEBUG(0,("svcctl_set_secdesc: prs_init() failed!\n"));
TALLOC_FREE( key );
return False;
}
if ( sec_io_desc("sec_desc", &sec_desc, &ps, 0 ) ) {
uint32 offset = prs_offset( &ps );
regval_ctr_addvalue( values, "Security", REG_BINARY, prs_data_p(&ps), offset );
ret = store_reg_values( key, values );
}
/* cleanup */
prs_mem_free( &ps );
TALLOC_FREE( key);
return ret;
}
/********************************************************************
********************************************************************/
const char *svcctl_lookup_dispname(TALLOC_CTX *ctx, const char *name, NT_USER_TOKEN *token )
{
char *display_name = NULL;
REGISTRY_KEY *key = NULL;
REGVAL_CTR *values;
REGISTRY_VALUE *val;
char *path = NULL;
WERROR wresult;
/* now add the security descriptor */
if (asprintf(&path, "%s\\%s", KEY_SERVICES, name) < 0) {
return NULL;
}
wresult = regkey_open_internal( NULL, &key, path, token,
REG_KEY_READ );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("svcctl_lookup_dispname: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
SAFE_FREE(path);
goto fail;
}
SAFE_FREE(path);
if ( !(values = TALLOC_ZERO_P( key, REGVAL_CTR )) ) {
DEBUG(0,("svcctl_lookup_dispname: talloc() failed!\n"));
TALLOC_FREE( key );
goto fail;
}
fetch_reg_values( key, values );
if ( !(val = regval_ctr_getvalue( values, "DisplayName" )) )
goto fail;
rpcstr_pull_talloc(ctx, &display_name, regval_data_p(val), regval_size(val), 0 );
TALLOC_FREE( key );
return display_name;
fail:
/* default to returning the service name */
TALLOC_FREE( key );
return talloc_strdup(ctx, name);
}
/********************************************************************
********************************************************************/
const char *svcctl_lookup_description(TALLOC_CTX *ctx, const char *name, NT_USER_TOKEN *token )
{
char *description = NULL;
REGISTRY_KEY *key = NULL;
REGVAL_CTR *values;
REGISTRY_VALUE *val;
char *path = NULL;
WERROR wresult;
/* now add the security descriptor */
if (asprintf(&path, "%s\\%s", KEY_SERVICES, name) < 0) {
return NULL;
}
wresult = regkey_open_internal( NULL, &key, path, token,
REG_KEY_READ );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("svcctl_lookup_description: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
SAFE_FREE(path);
return NULL;
}
SAFE_FREE(path);
if ( !(values = TALLOC_ZERO_P( key, REGVAL_CTR )) ) {
DEBUG(0,("svcctl_lookup_description: talloc() failed!\n"));
TALLOC_FREE( key );
return NULL;
}
fetch_reg_values( key, values );
if ( !(val = regval_ctr_getvalue( values, "Description" )) ) {
TALLOC_FREE( key );
return "Unix Service";
}
rpcstr_pull_talloc(ctx, &description, regval_data_p(val), regval_size(val), 0 );
TALLOC_FREE(key);
return description;
}
/********************************************************************
********************************************************************/
REGVAL_CTR *svcctl_fetch_regvalues( const char *name, NT_USER_TOKEN *token )
{
REGISTRY_KEY *key = NULL;
REGVAL_CTR *values;
char *path = NULL;
WERROR wresult;
/* now add the security descriptor */
if (asprintf(&path, "%s\\%s", KEY_SERVICES, name) < 0) {
return NULL;
}
wresult = regkey_open_internal( NULL, &key, path, token,
REG_KEY_READ );
if ( !W_ERROR_IS_OK(wresult) ) {
DEBUG(0,("svcctl_fetch_regvalues: key lookup failed! [%s] (%s)\n",
path, dos_errstr(wresult)));
SAFE_FREE(path);
return NULL;
}
SAFE_FREE(path);
if ( !(values = TALLOC_ZERO_P( NULL, REGVAL_CTR )) ) {
DEBUG(0,("svcctl_fetch_regvalues: talloc() failed!\n"));
TALLOC_FREE( key );
return NULL;
}
fetch_reg_values( key, values );
TALLOC_FREE( key );
return values;
}