[SCM] Samba Shared Repository - branch master updated
Jeremy Allison
jra at samba.org
Mon Mar 22 16:59:12 MDT 2010
The branch, master has been updated
via 7509b56... share_info.tdb could use non-canonicalized sharenames.
from 31b4585... convert_string_talloc_convenience - print out the input buffer in a better way (using dump_data since it isn't always directly readable)
http://gitweb.samba.org/?p=samba.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit 7509b56b5f59a7aeeb2ad1538ef71cbb8b459948
Author: Jeremy Allison <jra at samba.org>
Date: Mon Mar 22 15:57:31 2010 -0700
share_info.tdb could use non-canonicalized sharenames.
Fix this by moving canonicalization into lib/sharesec.c. Update the
db version to 3. Ensures we always find share names with security
descriptors attached.
Jeremy.
-----------------------------------------------------------------------
Summary of changes:
source3/include/proto.h | 1 +
source3/lib/sharesec.c | 157 +++++++++++++++++++++++++++++++++++++++++----
source3/param/loadparm.c | 12 ++--
3 files changed, 150 insertions(+), 20 deletions(-)
Changeset truncated at 500 lines:
diff --git a/source3/include/proto.h b/source3/include/proto.h
index 346da39..403b96a 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -4275,6 +4275,7 @@ unsigned long lp_parm_ulong(int snum, const char *type, const char *option, unsi
bool lp_parm_bool(int snum, const char *type, const char *option, bool def);
int lp_parm_enum(int snum, const char *type, const char *option,
const struct enum_list *_enum, int def);
+char *canonicalize_servicename(TALLOC_CTX *ctx, const char *src);
bool lp_add_home(const char *pszHomename, int iDefaultService,
const char *user, const char *pszHomedir);
int lp_add_service(const char *pszService, int iDefaultService);
diff --git a/source3/lib/sharesec.c b/source3/lib/sharesec.c
index 799d983..eef5f39 100644
--- a/source3/lib/sharesec.c
+++ b/source3/lib/sharesec.c
@@ -26,7 +26,9 @@
static struct db_context *share_db; /* used for share security descriptors */
#define SHARE_DATABASE_VERSION_V1 1
#define SHARE_DATABASE_VERSION_V2 2 /* version id in little endian. */
+#define SHARE_DATABASE_VERSION_V3 3 /* canonicalized sharenames as lower case */
+#define SHARE_SECURITY_DB_KEY_PREFIX_STR "SECDESC/"
/* Map generic permissions to file object specific permissions */
extern const struct generic_mapping file_generic_mapping;
@@ -37,10 +39,97 @@ static int delete_fn(struct db_record *rec, void *priv)
return 0;
}
+/*****************************************************
+ Looking for keys of the form: SHARE_SECURITY_DB_KEY_PREFIX_STR + "non lower case str".
+ If we find one re-write it into a canonical case form.
+*****************************************************/
+
+static int upgrade_v2_to_v3(struct db_record *rec, void *priv)
+{
+ size_t prefix_len = strlen(SHARE_SECURITY_DB_KEY_PREFIX_STR);
+ const char *servicename = NULL;
+ char *c_servicename = NULL;
+ char *newkey = NULL;
+ bool *p_upgrade_ok = (bool *)priv;
+ NTSTATUS status;
+
+ /* Is there space for a one character sharename ? */
+ if (rec->key.dsize <= prefix_len+2) {
+ return 0;
+ }
+
+ /* Does it start with the share key prefix ? */
+ if (memcmp(rec->key.dptr, SHARE_SECURITY_DB_KEY_PREFIX_STR,
+ prefix_len) != 0) {
+ return 0;
+ }
+
+ /* Is it a null terminated string as a key ? */
+ if (rec->key.dptr[rec->key.dsize-1] != '\0') {
+ return 0;
+ }
+
+ /* Bytes after the prefix are the sharename string. */
+ servicename = (char *)&rec->key.dptr[prefix_len];
+ c_servicename = canonicalize_servicename(talloc_tos(), servicename);
+ if (!c_servicename) {
+ smb_panic("out of memory upgrading share security db from v2 -> v3");
+ }
+
+ if (strcmp(servicename, c_servicename) == 0) {
+ /* Old and new names match. No canonicalization needed. */
+ TALLOC_FREE(c_servicename);
+ return 0;
+ }
+
+ /* Oops. Need to canonicalize name, delete old then store new. */
+ status = rec->delete_rec(rec);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("upgrade_v2_to_v3: Failed to delete secdesc for "
+ "%s: %s\n", rec->key.dptr, nt_errstr(status)));
+ TALLOC_FREE(c_servicename);
+ *p_upgrade_ok = false;
+ return -1;
+ } else {
+ DEBUG(10, ("upgrade_v2_to_v3: deleted secdesc for "
+ "%s\n", rec->key.dptr ));
+ }
+
+ if (!(newkey = talloc_asprintf(talloc_tos(),
+ SHARE_SECURITY_DB_KEY_PREFIX_STR "%s",
+ c_servicename))) {
+ smb_panic("out of memory upgrading share security db from v2 -> v3");
+ }
+
+ status = dbwrap_store(share_db,
+ string_term_tdb_data(newkey),
+ rec->value,
+ TDB_REPLACE);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("upgrade_v2_to_v3: Failed to store secdesc for "
+ "%s: %s\n", c_servicename, nt_errstr(status)));
+ TALLOC_FREE(c_servicename);
+ TALLOC_FREE(newkey);
+ *p_upgrade_ok = false;
+ return -1;
+ } else {
+ DEBUG(10, ("upgrade_v2_to_v3: stored secdesc for "
+ "%s\n", newkey ));
+ }
+
+ TALLOC_FREE(newkey);
+ TALLOC_FREE(c_servicename);
+
+ return 0;
+}
+
bool share_info_db_init(void)
{
const char *vstring = "INFO/version";
int32 vers_id;
+ int ret;
+ bool upgrade_ok = true;
if (share_db != NULL) {
return True;
@@ -55,7 +144,7 @@ bool share_info_db_init(void)
}
vers_id = dbwrap_fetch_int32(share_db, vstring);
- if (vers_id == SHARE_DATABASE_VERSION_V2) {
+ if (vers_id == SHARE_DATABASE_VERSION_V3) {
return true;
}
@@ -66,7 +155,7 @@ bool share_info_db_init(void)
}
vers_id = dbwrap_fetch_int32(share_db, vstring);
- if (vers_id == SHARE_DATABASE_VERSION_V2) {
+ if (vers_id == SHARE_DATABASE_VERSION_V3) {
/*
* Race condition
*/
@@ -76,6 +165,8 @@ bool share_info_db_init(void)
return true;
}
+ /* Move to at least V2. */
+
/* Cope with byte-reversed older versions of the db. */
if ((vers_id == SHARE_DATABASE_VERSION_V1) || (IREV(vers_id) == SHARE_DATABASE_VERSION_V1)) {
/* Written on a bigendian machine with old fetch_int code. Save as le. */
@@ -89,7 +180,6 @@ bool share_info_db_init(void)
}
if (vers_id != SHARE_DATABASE_VERSION_V2) {
- int ret;
ret = share_db->traverse(share_db, delete_fn, NULL);
if (ret < 0) {
DEBUG(0, ("traverse failed\n"));
@@ -102,6 +192,19 @@ bool share_info_db_init(void)
}
}
+ /* Finally upgrade to version 3, with canonicalized sharenames. */
+
+ ret = share_db->traverse(share_db, upgrade_v2_to_v3, &upgrade_ok);
+ if (ret < 0 || upgrade_ok == false) {
+ DEBUG(0, ("traverse failed\n"));
+ goto cancel;
+ }
+ if (dbwrap_store_int32(share_db, vstring,
+ SHARE_DATABASE_VERSION_V3) != 0) {
+ DEBUG(0, ("dbwrap_store_int32 failed\n"));
+ goto cancel;
+ }
+
if (share_db->transaction_commit(share_db) != 0) {
DEBUG(0, ("transaction_commit failed\n"));
return false;
@@ -159,17 +262,26 @@ SEC_DESC *get_share_security( TALLOC_CTX *ctx, const char *servicename,
char *key;
SEC_DESC *psd = NULL;
TDB_DATA data;
+ char *c_servicename = canonicalize_servicename(talloc_tos(), servicename);
NTSTATUS status;
+ if (!c_servicename) {
+ return NULL;
+ }
+
if (!share_info_db_init()) {
+ TALLOC_FREE(c_servicename);
return NULL;
}
- if (!(key = talloc_asprintf(ctx, "SECDESC/%s", servicename))) {
+ if (!(key = talloc_asprintf(ctx, SHARE_SECURITY_DB_KEY_PREFIX_STR "%s", c_servicename))) {
+ TALLOC_FREE(c_servicename);
DEBUG(0, ("talloc_asprintf failed\n"));
return NULL;
}
+ TALLOC_FREE(c_servicename);
+
data = dbwrap_fetch_bystring(share_db, talloc_tos(), key);
TALLOC_FREE(key);
@@ -186,11 +298,16 @@ SEC_DESC *get_share_security( TALLOC_CTX *ctx, const char *servicename,
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("unmarshall_sec_desc failed: %s\n",
nt_errstr(status)));
- return NULL;
+ return get_share_security_default(ctx, psize,
+ GENERIC_ALL_ACCESS);
}
- if (psd)
+ if (psd) {
*psize = ndr_size_security_descriptor(psd, NULL, 0);
+ } else {
+ return get_share_security_default(ctx, psize,
+ GENERIC_ALL_ACCESS);
+ }
return psd;
}
@@ -201,17 +318,20 @@ SEC_DESC *get_share_security( TALLOC_CTX *ctx, const char *servicename,
bool set_share_security(const char *share_name, SEC_DESC *psd)
{
- TALLOC_CTX *frame;
+ TALLOC_CTX *frame = talloc_stackframe();
char *key;
bool ret = False;
TDB_DATA blob;
NTSTATUS status;
+ char *c_share_name = canonicalize_servicename(frame, share_name);
- if (!share_info_db_init()) {
- return False;
+ if (!c_share_name) {
+ goto out;
}
- frame = talloc_stackframe();
+ if (!share_info_db_init()) {
+ goto out;
+ }
status = marshall_sec_desc(frame, psd, &blob.dptr, &blob.dsize);
@@ -221,7 +341,7 @@ bool set_share_security(const char *share_name, SEC_DESC *psd)
goto out;
}
- if (!(key = talloc_asprintf(frame, "SECDESC/%s", share_name))) {
+ if (!(key = talloc_asprintf(frame, SHARE_SECURITY_DB_KEY_PREFIX_STR "%s", c_share_name))) {
DEBUG(0, ("talloc_asprintf failed\n"));
goto out;
}
@@ -251,13 +371,20 @@ bool delete_share_security(const char *servicename)
TDB_DATA kbuf;
char *key;
NTSTATUS status;
+ char *c_servicename = canonicalize_servicename(talloc_tos(), servicename);
+
+ if (!c_servicename) {
+ return NULL;
+ }
if (!share_info_db_init()) {
+ TALLOC_FREE(c_servicename);
return False;
}
- if (!(key = talloc_asprintf(talloc_tos(), "SECDESC/%s",
- servicename))) {
+ if (!(key = talloc_asprintf(talloc_tos(), SHARE_SECURITY_DB_KEY_PREFIX_STR "%s",
+ c_servicename))) {
+ TALLOC_FREE(c_servicename);
return False;
}
kbuf = string_term_tdb_data(key);
@@ -265,10 +392,12 @@ bool delete_share_security(const char *servicename)
status = dbwrap_trans_delete(share_db, kbuf);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("delete_share_security: Failed to delete entry for "
- "share %s: %s\n", servicename, nt_errstr(status)));
+ "share %s: %s\n", c_servicename, nt_errstr(status)));
+ TALLOC_FREE(c_servicename);
return False;
}
+ TALLOC_FREE(c_servicename);
return True;
}
diff --git a/source3/param/loadparm.c b/source3/param/loadparm.c
index a6e096e..9e9930f 100644
--- a/source3/param/loadparm.c
+++ b/source3/param/loadparm.c
@@ -5792,7 +5792,6 @@ static void init_copymap(struct service *pservice);
static bool hash_a_service(const char *name, int number);
static void free_service_byindex(int iService);
static void free_param_opts(struct param_opt_struct **popts);
-static char * canonicalize_servicename(const char *name);
static void show_parameter(int parmIndex);
static bool is_synonym_of(int parm1, int parm2, bool *inverse);
@@ -6117,6 +6116,7 @@ static void free_service_byindex(int idx)
if (ServicePtrs[idx]->szService) {
char *canon_name = canonicalize_servicename(
+ talloc_tos(),
ServicePtrs[idx]->szService );
dbwrap_delete_bystring(ServiceHash, canon_name );
@@ -6208,7 +6208,7 @@ static int add_a_service(const struct service *pservice, const char *name)
Convert a string to uppercase and remove whitespaces.
***************************************************************************/
-static char *canonicalize_servicename(const char *src)
+char *canonicalize_servicename(TALLOC_CTX *ctx, const char *src)
{
char *result;
@@ -6217,7 +6217,7 @@ static char *canonicalize_servicename(const char *src)
return NULL;
}
- result = talloc_strdup(talloc_tos(), src);
+ result = talloc_strdup(ctx, src);
SMB_ASSERT(result != NULL);
strlower_m(result);
@@ -6244,7 +6244,7 @@ static bool hash_a_service(const char *name, int idx)
DEBUG(10,("hash_a_service: hashing index %d for service name %s\n",
idx, name));
- canon_name = canonicalize_servicename( name );
+ canon_name = canonicalize_servicename(talloc_tos(), name );
dbwrap_store_bystring(ServiceHash, canon_name,
make_tdb_data((uint8 *)&idx, sizeof(idx)),
@@ -6751,7 +6751,7 @@ static int getservicebyname(const char *pszServiceName, struct service *pservice
return -1;
}
- canon_name = canonicalize_servicename(pszServiceName);
+ canon_name = canonicalize_servicename(talloc_tos(), pszServiceName);
data = dbwrap_fetch_bystring(ServiceHash, canon_name, canon_name);
@@ -8732,7 +8732,7 @@ static int process_usershare_file(const char *dir_name, const char *file_name, i
}
{
- char *canon_name = canonicalize_servicename(service_name);
+ char *canon_name = canonicalize_servicename(talloc_tos(), service_name);
TDB_DATA data = dbwrap_fetch_bystring(
ServiceHash, canon_name, canon_name);
--
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