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s3-pdb: Break SECRETS3 dependency on PDB.

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This is causing circular depdnendcies that bring libpdb in all code and this is
BAD.

This change 'protects' the sid and guid of the domain by adding a special key
that makes them effectively read only.

Limit this temporarily to the samba 4 build, once it gets some good testing the
samba4 ifdefs can be dropped.

fix pdb dependencies

Signed-off-by: Andreas Schneider <asn@samba.org>
This commit is contained in:
Simo Sorce 2012-01-26 15:27:54 -05:00 committed by Andreas Schneider
parent c543ce1028
commit e6c39a292c
4 changed files with 69 additions and 61 deletions
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2
source3/auth/wscript_build
View File

@ -16,7 +16,7 @@ AUTH_SRC = '''auth.c
bld.SAMBA3_SUBSYSTEM('TOKEN_UTIL',
source='token_util.c',
deps='samba-util',
deps='samba-util pdb',
vars=locals())
bld.SAMBA3_SUBSYSTEM('USER_UTIL',

5
source3/include/secrets.h
View File

@ -39,6 +39,7 @@
really secret. */
#define SECRETS_DOMAIN_SID "SECRETS/SID"
#define SECRETS_SAM_SID "SAM/SID"
#define SECRETS_PROTECT_IDS "SECRETS/PROTECT/IDS"
/* The domain GUID and server GUID (NOT the same) are also not secret */
#define SECRETS_DOMAIN_GUID "SECRETS/DOMGUID"
@ -88,6 +89,10 @@ void secrets_shutdown(void);
void *secrets_fetch(const char *key, size_t *size);
bool secrets_store(const char *key, const void *data, size_t size);
bool secrets_delete(const char *key);
/* The following definitions come from passdb/machine_account_secrets.c */
bool secrets_mark_domain_protected(const char *domain);
bool secrets_clear_domain_protection(const char *domain);
bool secrets_store_domain_sid(const char *domain, const struct dom_sid *sid);
bool secrets_fetch_domain_sid(const char *domain, struct dom_sid *sid);
bool secrets_store_domain_guid(const char *domain, struct GUID *guid);

101
source3/passdb/machine_account_secrets.c
View File

@ -53,18 +53,52 @@ static const char *domain_sid_keystr(const char *domain)
return keystr;
}
bool secrets_store_domain_sid(const char *domain, const struct dom_sid *sid)
static const char *protect_ids_keystr(const char *domain)
{
char *keystr;
keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
SECRETS_PROTECT_IDS, domain);
SMB_ASSERT(keystr != NULL);
return keystr;
}
/* N O T E: never use this outside of passdb modules that store the SID on their own */
bool secrets_mark_domain_protected(const char *domain)
{
bool ret;
ret = secrets_store(protect_ids_keystr(domain), "TRUE", 5);
if (!ret) {
DEBUG(0, ("Failed to protect the Domain IDs\n"));
}
return ret;
}
bool secrets_clear_domain_protection(const char *domain)
{
bool ret;
ret = secrets_delete(protect_ids_keystr(domain));
if (!ret) {
DEBUG(0, ("Failed to remove Domain IDs protection\n"));
}
return ret;
}
bool secrets_store_domain_sid(const char *domain, const struct dom_sid *sid)
{
char *protect_ids;
bool ret;
#if _SAMBA_BUILD_ == 4
if (strequal(domain, get_global_sam_name()) &&
(pdb_capabilities() & PDB_CAP_ADS)) {
/* If we have a ADS-capable passdb backend, we
* must never make up our own SID, it will
* already be in the directory */
DEBUG(0, ("Refusing to store a Domain SID, this should be read from the directory not stored here\n"));
return false;
protect_ids = secrets_fetch(protect_ids_keystr(domain), NULL);
if (protect_ids) {
if (strncmp(protect_ids, "TRUE", 4)) {
DEBUG(0, ("Refusing to store a Domain SID, "
"it has been marked as protected!\n"));
return false;
}
}
#endif
@ -81,24 +115,6 @@ bool secrets_fetch_domain_sid(const char *domain, struct dom_sid *sid)
struct dom_sid *dyn_sid;
size_t size = 0;
#if _SAMBA_BUILD_ == 4
if (strequal(domain, get_global_sam_name()) &&
(pdb_capabilities() & PDB_CAP_ADS)) {
struct pdb_domain_info *domain_info;
domain_info = pdb_get_domain_info(talloc_tos());
if (!domain_info) {
/* If we have a ADS-capable passdb backend, we
* must never make up our own SID, it will
* already be in the directory */
DEBUG(0, ("Unable to fetch a Domain SID from the directory!\n"));
return false;
}
*sid = domain_info->sid;
return true;
}
#endif
dyn_sid = (struct dom_sid *)secrets_fetch(domain_sid_keystr(domain), &size);
if (dyn_sid == NULL)
@ -116,16 +132,17 @@ bool secrets_fetch_domain_sid(const char *domain, struct dom_sid *sid)
bool secrets_store_domain_guid(const char *domain, struct GUID *guid)
{
char *protect_ids;
fstring key;
#if _SAMBA_BUILD_ == 4
if (strequal(domain, get_global_sam_name()) &&
(pdb_capabilities() & PDB_CAP_ADS)) {
/* If we have a ADS-capable passdb backend, we
* must never make up our own GUID, it will
* already be in the directory */
DEBUG(0, ("Refusing to store a Domain GUID, this should be read from the directory not stored here\n"));
return false;
protect_ids = secrets_fetch(protect_ids_keystr(domain), NULL);
if (protect_ids) {
if (strncmp(protect_ids, "TRUE", 4)) {
DEBUG(0, ("Refusing to store a Domain SID, "
"it has been marked as protected!\n"));
return false;
}
}
#endif
@ -141,24 +158,6 @@ bool secrets_fetch_domain_guid(const char *domain, struct GUID *guid)
size_t size = 0;
struct GUID new_guid;
#if _SAMBA_BUILD_ == 4
if (strequal(domain, get_global_sam_name()) &&
(pdb_capabilities() & PDB_CAP_ADS)) {
struct pdb_domain_info *domain_info;
domain_info = pdb_get_domain_info(talloc_tos());
if (!domain_info) {
/* If we have a ADS-capable passdb backend, we
* must never make up our own SID, it will
* already be in the directory */
DEBUG(0, ("Unable to fetch a Domain GUID from the directory!\n"));
return false;
}
*guid = domain_info->guid;
return true;
}
#endif
slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_DOMAIN_GUID, domain);
strupper_m(key);
dyn_guid = (struct GUID *)secrets_fetch(key, &size);

22
source3/wscript_build
View File

@ -692,7 +692,7 @@ bld.SAMBA3_LIBRARY('nss_wins',
bld.SAMBA3_LIBRARY('gse',
source='librpc/crypto/gse_krb5.c librpc/crypto/gse.c',
deps='KRB5_WRAP gensec param KRBCLIENT SECRETS3',
deps='KRB5_WRAP gensec param KRBCLIENT secrets3',
private_library=True)
bld.SAMBA3_LIBRARY('msrpc3',
@ -725,7 +725,7 @@ bld.SAMBA3_SUBSYSTEM('TLDAP',
bld.SAMBA3_LIBRARY('pdb',
source=PASSDB_SRC,
deps='SECRETS3 GROUPDB SERVER_MUTEX wbclient LIBCLI_AUTH flag_mapping',
deps='secrets3 GROUPDB SERVER_MUTEX wbclient LIBCLI_AUTH flag_mapping',
private_library=True,
public_headers='''
include/passdb.h
@ -800,7 +800,7 @@ bld.SAMBA3_LIBRARY('popt_samba3',
bld.SAMBA3_LIBRARY('util_cmdline',
source='lib/util_cmdline.c',
deps='SECRETS3 popt',
deps='secrets3 popt',
private_library=True)
bld.SAMBA3_SUBSYSTEM('KRBCLIENT',
@ -871,9 +871,13 @@ bld.SAMBA3_SUBSYSTEM('CLDAP',
deps='cli-ldap-common cli_cldap LIBTSOCKET',
vars=locals())
bld.SAMBA3_SUBSYSTEM('SECRETS3',
# NOTE: The secrets3 library is a low level library used by several subsystems.
# PLEASE DO NOT make it depend on high level libraries like PDB, if you are
# doing that your design is wrong and needs changing. -SSS
bld.SAMBA3_LIBRARY('secrets3',
source=SECRETS_SRC,
deps='NDR_SECRETS param samba3util dbwrap pdb',
deps='NDR_SECRETS param samba3util dbwrap',
private_library=True,
vars=locals())
bld.SAMBA3_LIBRARY('smbldap',
@ -1010,7 +1014,7 @@ bld.SAMBA3_SUBSYSTEM('FNAME_UTIL',
bld.SAMBA3_SUBSYSTEM('LIBNET',
source=LIBNET_SRC,
deps='NDR_LIBNET_JOIN INIT_SAMR net_keytab',
deps='NDR_LIBNET_JOIN INIT_SAMR net_keytab pdb',
vars=locals())
bld.SAMBA3_LIBRARY('net_keytab',
@ -1074,7 +1078,7 @@ bld.SAMBA3_SUBSYSTEM('DCUTIL',
bld.SAMBA3_LIBRARY('trusts_util',
source='libsmb/trusts_util.c',
deps='libcli_netlogon3 msrpc3',
deps='libcli_netlogon3 msrpc3 pdb',
vars=locals(),
private_library=True)
@ -1148,7 +1152,7 @@ bld.SAMBA3_LIBRARY('libcli_netlogon3',
bld.SAMBA3_LIBRARY('cli_spoolss',
source=LIBCLI_SPOOLSS_SRC,
deps='RPC_NDR_SPOOLSS param SECRETS3',
deps='RPC_NDR_SPOOLSS param secrets3',
private_library=True)
bld.SAMBA3_SUBSYSTEM('LIBCLI_WINREG',
@ -1359,7 +1363,7 @@ bld.SAMBA3_BINARY('smbta-util',
source=SMBTA_UTIL_SRC,
deps='''
talloc
SECRETS3
secrets3
param''',
vars=locals())