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-rw-r--r--source3/lib/sharesec.c157
1 files changed, 143 insertions, 14 deletions
diff --git a/source3/lib/sharesec.c b/source3/lib/sharesec.c
index 799d983c82..eef5f39fc0 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;
}
generated by cgit (git 2.34.1) at 2024-11-23 04:47:12 +0000