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-rw-r--r--libcli/auth/schannel_state.h27
-rw-r--r--libcli/auth/schannel_state_tdb.c196
2 files changed, 181 insertions, 42 deletions
diff --git a/libcli/auth/schannel_state.h b/libcli/auth/schannel_state.h
index efa8d20b08..c1fa1245cf 100644
--- a/libcli/auth/schannel_state.h
+++ b/libcli/auth/schannel_state.h
@@ -23,8 +23,20 @@
#ifndef _LIBCLI_AUTH_SCHANNEL_STATE_H__
#define _LIBCLI_AUTH_SCHANNEL_STATE_H__
+NTSTATUS schannel_get_creds_state(TALLOC_CTX *mem_ctx,
+ const char *computer_name,
+ struct netlogon_creds_CredentialState **creds);
+
+NTSTATUS schannel_save_creds_state(TALLOC_CTX *mem_ctx,
+ struct netlogon_creds_CredentialState *creds);
+
+NTSTATUS schannel_check_creds_state(TALLOC_CTX *mem_ctx,
+ const char *computer_name,
+ struct netr_Authenticator *received_authenticator,
+ struct netr_Authenticator *return_authenticator,
+ struct netlogon_creds_CredentialState **creds_out);
+
struct ldb_context;
-struct tdb_context;
NTSTATUS schannel_store_session_key_ldb(struct ldb_context *ldb,
TALLOC_CTX *mem_ctx,
@@ -39,17 +51,4 @@ NTSTATUS schannel_creds_server_step_check_ldb(struct ldb_context *ldb,
struct netr_Authenticator *received_authenticator,
struct netr_Authenticator *return_authenticator,
struct netlogon_creds_CredentialState **creds_out);
-NTSTATUS schannel_store_session_key_tdb(struct tdb_context *tdb,
- TALLOC_CTX *mem_ctx,
- struct netlogon_creds_CredentialState *creds);
-NTSTATUS schannel_fetch_session_key_tdb(struct tdb_context *tdb,
- TALLOC_CTX *mem_ctx,
- const char *computer_name,
- struct netlogon_creds_CredentialState **creds);
-NTSTATUS schannel_creds_server_step_check_tdb(struct tdb_context *tdb,
- TALLOC_CTX *mem_ctx,
- const char *computer_name,
- struct netr_Authenticator *received_authenticator,
- struct netr_Authenticator *return_authenticator,
- struct netlogon_creds_CredentialState **creds_out);
#endif
diff --git a/libcli/auth/schannel_state_tdb.c b/libcli/auth/schannel_state_tdb.c
index 49c89085be..434d7d7f8c 100644
--- a/libcli/auth/schannel_state_tdb.c
+++ b/libcli/auth/schannel_state_tdb.c
@@ -26,9 +26,75 @@
#include "../libcli/auth/schannel_state.h"
#include "../librpc/gen_ndr/ndr_schannel.h"
+#define SECRETS_SCHANNEL_STATE "SECRETS/SCHANNEL"
+
+/******************************************************************************
+ Open or create the schannel session store tdb.
+*******************************************************************************/
+
+#define SCHANNEL_STORE_VERSION_1 1
+#define SCHANNEL_STORE_VERSION_2 2 /* should not be used */
+#define SCHANNEL_STORE_VERSION_CURRENT SCHANNEL_STORE_VERSION_1
+
+static TDB_CONTEXT *open_schannel_session_store(TALLOC_CTX *mem_ctx)
+{
+ TDB_DATA vers;
+ uint32 ver;
+ TDB_CONTEXT *tdb_sc = NULL;
+ char *fname = talloc_asprintf(mem_ctx, "%s/schannel_store.tdb", lp_private_dir());
+
+ if (!fname) {
+ return NULL;
+ }
+
+ tdb_sc = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
+
+ if (!tdb_sc) {
+ DEBUG(0,("open_schannel_session_store: Failed to open %s\n", fname));
+ TALLOC_FREE(fname);
+ return NULL;
+ }
+
+ again:
+ vers = tdb_fetch_bystring(tdb_sc, "SCHANNEL_STORE_VERSION");
+ if (vers.dptr == NULL) {
+ /* First opener, no version. */
+ SIVAL(&ver,0,SCHANNEL_STORE_VERSION_CURRENT);
+ vers.dptr = (uint8 *)&ver;
+ vers.dsize = 4;
+ tdb_store_bystring(tdb_sc, "SCHANNEL_STORE_VERSION", vers, TDB_REPLACE);
+ vers.dptr = NULL;
+ } else if (vers.dsize == 4) {
+ ver = IVAL(vers.dptr,0);
+ if (ver == SCHANNEL_STORE_VERSION_2) {
+ DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
+ (int)ver, fname ));
+ tdb_wipe_all(tdb_sc);
+ goto again;
+ }
+ if (ver != SCHANNEL_STORE_VERSION_CURRENT) {
+ DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
+ (int)ver, fname ));
+ tdb_close(tdb_sc);
+ tdb_sc = NULL;
+ }
+ } else {
+ tdb_close(tdb_sc);
+ tdb_sc = NULL;
+ DEBUG(0,("open_schannel_session_store: wrong version number size %d in %s\n",
+ (int)vers.dsize, fname ));
+ }
+
+ SAFE_FREE(vers.dptr);
+ TALLOC_FREE(fname);
+
+ return tdb_sc;
+}
+
/********************************************************************
********************************************************************/
+static
NTSTATUS schannel_store_session_key_tdb(struct tdb_context *tdb,
TALLOC_CTX *mem_ctx,
struct netlogon_creds_CredentialState *creds)
@@ -79,6 +145,7 @@ NTSTATUS schannel_store_session_key_tdb(struct tdb_context *tdb,
/********************************************************************
********************************************************************/
+static
NTSTATUS schannel_fetch_session_key_tdb(struct tdb_context *tdb,
TALLOC_CTX *mem_ctx,
const char *computer_name,
@@ -147,61 +214,134 @@ NTSTATUS schannel_fetch_session_key_tdb(struct tdb_context *tdb,
return NT_STATUS_OK;
}
-/********************************************************************
+/******************************************************************************
+ Wrapper around schannel_fetch_session_key_tdb()
+ Note we must be root here.
+*******************************************************************************/
+
+NTSTATUS schannel_get_creds_state(TALLOC_CTX *mem_ctx,
+ const char *computer_name,
+ struct netlogon_creds_CredentialState **creds)
+{
+ struct tdb_context *tdb;
+ NTSTATUS status;
+
+ tdb = open_schannel_session_store(mem_ctx);
+ if (!tdb) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
- Validate an incoming authenticator against the credentials for the remote
- machine.
+ status = schannel_fetch_session_key_tdb(tdb, mem_ctx,
+ computer_name, creds);
- The credentials are (re)read and from the schannel database, and
- written back after the caclulations are performed.
+ tdb_close(tdb);
- The creds_out parameter (if not NULL) returns the credentials, if
- the caller needs some of that information.
+ return status;
+}
+
+/******************************************************************************
+ Wrapper around schannel_store_session_key_tdb()
+ Note we must be root here.
+*******************************************************************************/
+
+NTSTATUS schannel_save_creds_state(TALLOC_CTX *mem_ctx,
+ struct netlogon_creds_CredentialState *creds)
+{
+ struct tdb_context *tdb;
+ NTSTATUS status;
+
+ tdb = open_schannel_session_store(mem_ctx);
+ if (!tdb) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ status = schannel_store_session_key_tdb(tdb, mem_ctx, creds);
+
+ tdb_close(tdb);
+
+ return status;
+}
+
+/********************************************************************
+ Validate an incoming authenticator against the credentials for the
+ remote machine stored in the schannel database.
+
+ The credentials are (re)read and from the schannel database, and
+ written back after the caclulations are performed.
+
+ If the creds_out parameter is not NULL returns the credentials.
********************************************************************/
-NTSTATUS schannel_creds_server_step_check_tdb(struct tdb_context *tdb,
- TALLOC_CTX *mem_ctx,
- const char *computer_name,
- struct netr_Authenticator *received_authenticator,
- struct netr_Authenticator *return_authenticator,
- struct netlogon_creds_CredentialState **creds_out)
+NTSTATUS schannel_check_creds_state(TALLOC_CTX *mem_ctx,
+ const char *computer_name,
+ struct netr_Authenticator *received_authenticator,
+ struct netr_Authenticator *return_authenticator,
+ struct netlogon_creds_CredentialState **creds_out)
{
+ TALLOC_CTX *tmpctx;
+ struct tdb_context *tdb;
struct netlogon_creds_CredentialState *creds;
NTSTATUS status;
int ret;
+ tmpctx = talloc_named(mem_ctx, 0, "schannel_check_creds_state");
+ if (!tmpctx) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ tdb = open_schannel_session_store(tmpctx);
+ if (!tdb) {
+ status = NT_STATUS_ACCESS_DENIED;
+ goto done;
+ }
+
ret = tdb_transaction_start(tdb);
if (ret != 0) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ status = NT_STATUS_INTERNAL_DB_CORRUPTION;
+ goto done;
}
/* Because this is a shared structure (even across
* disconnects) we must update the database every time we
* update the structure */
- status = schannel_fetch_session_key_tdb(tdb, mem_ctx, computer_name,
- &creds);
+ status = schannel_fetch_session_key_tdb(tdb, tmpctx,
+ computer_name, &creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ tdb_transaction_cancel(tdb);
+ goto done;
+ }
- if (NT_STATUS_IS_OK(status)) {
- status = netlogon_creds_server_step_check(creds,
- received_authenticator,
- return_authenticator);
+ status = netlogon_creds_server_step_check(creds,
+ received_authenticator,
+ return_authenticator);
+ if (!NT_STATUS_IS_OK(status)) {
+ tdb_transaction_cancel(tdb);
+ goto done;
}
- if (NT_STATUS_IS_OK(status)) {
- status = schannel_store_session_key_tdb(tdb, mem_ctx, creds);
+ status = schannel_store_session_key_tdb(tdb, tmpctx, creds);
+ if (!NT_STATUS_IS_OK(status)) {
+ tdb_transaction_cancel(tdb);
+ goto done;
}
- if (NT_STATUS_IS_OK(status)) {
- tdb_transaction_commit(tdb);
- if (creds_out) {
- *creds_out = creds;
- talloc_steal(mem_ctx, creds);
+ tdb_transaction_commit(tdb);
+
+ if (creds_out) {
+ *creds_out = talloc_steal(mem_ctx, creds);
+ if (!*creds_out) {
+ status = NT_STATUS_NO_MEMORY;
+ goto done;
}
- } else {
- tdb_transaction_cancel(tdb);
}
+ status = NT_STATUS_OK;
+
+done:
+ talloc_free(tmpctx);
+ if (tdb) tdb_close(tdb);
return status;
}
+
generated by cgit (git 2.34.1) at 2024-11-25 23:24:14 +0000