Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 573 insertions, 0 deletions

diff --git a/source3/passdb/secrets.c b/source3/passdb/secrets.c
new file mode 100644
index 0000000..fdacafa
--- /dev/null
+++ b/source3/passdb/secrets.c
@@ -0,0 +1,573 @@
+/*
+   Unix SMB/CIFS implementation.
+   Copyright (C) Andrew Tridgell 1992-2001
+   Copyright (C) Andrew Bartlett      2002
+   Copyright (C) Rafal Szczesniak     2002
+   Copyright (C) Tim Potter           2001
+
+   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/>.
+*/
+
+/* the Samba secrets database stores any generated, private information
+   such as the local SID and machine trust password */
+
+#include "includes.h"
+#include "system/filesys.h"
+#include "../libcli/auth/libcli_auth.h"
+#include "librpc/gen_ndr/ndr_secrets.h"
+#include "secrets.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_open.h"
+#include "../libcli/security/security.h"
+#include "util_tdb.h"
+#include "auth/credentials/credentials.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_PASSDB
+
+static struct db_context *db_ctx;
+
+/* open up the secrets database with specified private_dir path */
+bool secrets_init_path(const char *private_dir)
+{
+	char *fname = NULL;
+	TALLOC_CTX *frame;
+
+	if (db_ctx != NULL) {
+		return True;
+	}
+
+	if (private_dir == NULL) {
+		return False;
+	}
+
+	frame = talloc_stackframe();
+	fname = talloc_asprintf(frame, "%s/secrets.tdb", private_dir);
+	if (fname == NULL) {
+		TALLOC_FREE(frame);
+		return False;
+	}
+
+	db_ctx = db_open(NULL, fname, 0,
+			 TDB_DEFAULT, O_RDWR|O_CREAT, 0600,
+			 DBWRAP_LOCK_ORDER_1, DBWRAP_FLAG_NONE);
+
+	if (db_ctx == NULL) {
+		DEBUG(0,("Failed to open %s\n", fname));
+		TALLOC_FREE(frame);
+		return False;
+	}
+
+	TALLOC_FREE(frame);
+	return True;
+}
+
+/* open up the secrets database */
+bool secrets_init(void)
+{
+	return secrets_init_path(lp_private_dir());
+}
+
+struct db_context *secrets_db_ctx(void)
+{
+	if (!secrets_init()) {
+		return NULL;
+	}
+
+	return db_ctx;
+}
+
+/*
+ * close secrets.tdb
+ */
+void secrets_shutdown(void)
+{
+	TALLOC_FREE(db_ctx);
+}
+
+/* read a entry from the secrets database - the caller must free the result
+   if size is non-null then the size of the entry is put in there
+ */
+void *secrets_fetch(const char *key, size_t *size)
+{
+	TDB_DATA dbuf;
+	void *result;
+	NTSTATUS status;
+
+	if (!secrets_init()) {
+		return NULL;
+	}
+
+	status = dbwrap_fetch(db_ctx, talloc_tos(), string_tdb_data(key),
+			      &dbuf);
+	if (!NT_STATUS_IS_OK(status)) {
+		return NULL;
+	}
+
+	result = smb_memdup(dbuf.dptr, dbuf.dsize);
+	if (result == NULL) {
+		return NULL;
+	}
+	TALLOC_FREE(dbuf.dptr);
+
+	if (size) {
+		*size = dbuf.dsize;
+	}
+
+	return result;
+}
+
+/* store a secrets entry
+ */
+bool secrets_store(const char *key, const void *data, size_t size)
+{
+	NTSTATUS status;
+
+	if (!secrets_init()) {
+		return false;
+	}
+
+	status = dbwrap_trans_store(db_ctx, string_tdb_data(key),
+				    make_tdb_data((const uint8_t *)data, size),
+				    TDB_REPLACE);
+	return NT_STATUS_IS_OK(status);
+}
+
+bool secrets_store_creds(struct cli_credentials *creds)
+{
+	const char *p = NULL;
+	bool ok;
+
+	p = cli_credentials_get_username(creds);
+	if (p == NULL) {
+		return false;
+	}
+
+	ok = secrets_store(SECRETS_AUTH_USER, p, strlen(p) + 1);
+	if (!ok) {
+		DBG_ERR("Failed storing auth user name\n");
+		return false;
+	}
+
+
+	p = cli_credentials_get_domain(creds);
+	if (p == NULL) {
+		return false;
+	}
+
+	ok = secrets_store(SECRETS_AUTH_DOMAIN, p, strlen(p) + 1);
+	if (!ok) {
+		DBG_ERR("Failed storing auth domain name\n");
+		return false;
+	}
+
+
+	p = cli_credentials_get_password(creds);
+	if (p == NULL) {
+		return false;
+	}
+
+	ok = secrets_store(SECRETS_AUTH_PASSWORD, p, strlen(p) + 1);
+	if (!ok) {
+		DBG_ERR("Failed storing auth password\n");
+		return false;
+	}
+
+	return true;
+}
+
+
+/* delete a secets database entry
+ */
+bool secrets_delete_entry(const char *key)
+{
+	NTSTATUS status;
+	if (!secrets_init()) {
+		return false;
+	}
+
+	status = dbwrap_trans_delete(db_ctx, string_tdb_data(key));
+
+	return NT_STATUS_IS_OK(status);
+}
+
+/*
+ * Deletes the key if it exists.
+ */
+bool secrets_delete(const char *key)
+{
+	bool exists;
+
+	if (!secrets_init()) {
+		return false;
+	}
+
+	exists = dbwrap_exists(db_ctx, string_tdb_data(key));
+	if (!exists) {
+		return true;
+	}
+
+	return secrets_delete_entry(key);
+}
+
+/**
+ * Form a key for fetching a trusted domain password
+ *
+ * @param domain trusted domain name
+ *
+ * @return stored password's key
+ **/
+static char *trustdom_keystr(const char *domain)
+{
+	char *keystr;
+
+	keystr = talloc_asprintf_strupper_m(talloc_tos(), "%s/%s",
+					    SECRETS_DOMTRUST_ACCT_PASS,
+					    domain);
+	SMB_ASSERT(keystr != NULL);
+	return keystr;
+}
+
+/************************************************************************
+ Routine to get account password to trusted domain
+************************************************************************/
+
+bool secrets_fetch_trusted_domain_password(const char *domain, char** pwd,
+                                           struct dom_sid *sid, time_t *pass_last_set_time)
+{
+	struct TRUSTED_DOM_PASS pass;
+	enum ndr_err_code ndr_err;
+
+	/* unpacking structures */
+	DATA_BLOB blob;
+
+	/* fetching trusted domain password structure */
+	if (!(blob.data = (uint8_t *)secrets_fetch(trustdom_keystr(domain),
+						   &blob.length))) {
+		DEBUG(5, ("secrets_fetch failed!\n"));
+		return False;
+	}
+
+	/* unpack trusted domain password */
+	ndr_err = ndr_pull_struct_blob(&blob, talloc_tos(), &pass,
+			(ndr_pull_flags_fn_t)ndr_pull_TRUSTED_DOM_PASS);
+
+	SAFE_FREE(blob.data);
+
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		return false;
+	}
+
+
+	/* the trust's password */
+	if (pwd) {
+		*pwd = SMB_STRDUP(pass.pass);
+		if (!*pwd) {
+			return False;
+		}
+	}
+
+	/* last change time */
+	if (pass_last_set_time) *pass_last_set_time = pass.mod_time;
+
+	/* domain sid */
+	if (sid != NULL) sid_copy(sid, &pass.domain_sid);
+
+	return True;
+}
+
+/**
+ * Routine to store the password for trusted domain
+ *
+ * @param domain remote domain name
+ * @param pwd plain text password of trust relationship
+ * @param sid remote domain sid
+ *
+ * @return true if succeeded
+ **/
+
+bool secrets_store_trusted_domain_password(const char* domain, const char* pwd,
+                                           const struct dom_sid *sid)
+{
+	bool ret;
+
+	/* packing structures */
+	DATA_BLOB blob;
+	enum ndr_err_code ndr_err;
+	struct TRUSTED_DOM_PASS pass;
+	ZERO_STRUCT(pass);
+
+	pass.uni_name = domain;
+	pass.uni_name_len = strlen(domain)+1;
+
+	/* last change time */
+	pass.mod_time = time(NULL);
+
+	/* password of the trust */
+	pass.pass_len = strlen(pwd);
+	pass.pass = pwd;
+
+	/* domain sid */
+	sid_copy(&pass.domain_sid, sid);
+
+	ndr_err = ndr_push_struct_blob(&blob, talloc_tos(), &pass,
+			(ndr_push_flags_fn_t)ndr_push_TRUSTED_DOM_PASS);
+	if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+		return false;
+	}
+
+	ret = secrets_store(trustdom_keystr(domain), blob.data, blob.length);
+
+	data_blob_free(&blob);
+
+	return ret;
+}
+
+/************************************************************************
+ Routine to delete the password for trusted domain
+************************************************************************/
+
+bool trusted_domain_password_delete(const char *domain)
+{
+	return secrets_delete_entry(trustdom_keystr(domain));
+}
+
+bool secrets_store_ldap_pw(const char* dn, char* pw)
+{
+	char *key = NULL;
+	bool ret;
+
+	if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, dn) < 0) {
+		DEBUG(0, ("secrets_store_ldap_pw: asprintf failed!\n"));
+		return False;
+	}
+
+	ret = secrets_store(key, pw, strlen(pw)+1);
+
+	SAFE_FREE(key);
+	return ret;
+}
+
+/*******************************************************************
+ Find the ldap password.
+******************************************************************/
+
+bool fetch_ldap_pw(char **dn, char** pw)
+{
+	char *key = NULL;
+	size_t size = 0;
+
+	*dn = smb_xstrdup(lp_ldap_admin_dn());
+
+	if (asprintf(&key, "%s/%s", SECRETS_LDAP_BIND_PW, *dn) < 0) {
+		SAFE_FREE(*dn);
+		DEBUG(0, ("fetch_ldap_pw: asprintf failed!\n"));
+		return false;
+	}
+
+	*pw=(char *)secrets_fetch(key, &size);
+	SAFE_FREE(key);
+
+	if ((size != 0) && ((*pw)[size-1] != '\0')) {
+		DBG_ERR("Non 0-terminated password for dn %s\n", *dn);
+		SAFE_FREE(*pw);
+		SAFE_FREE(*dn);
+		return false;
+	}
+
+	if (!size) {
+		/* Upgrade 2.2 style entry */
+		char *p;
+	        char* old_style_key = SMB_STRDUP(*dn);
+		char *data;
+		fstring old_style_pw;
+
+		if (!old_style_key) {
+			DEBUG(0, ("fetch_ldap_pw: strdup failed!\n"));
+			SAFE_FREE(*pw);
+			SAFE_FREE(*dn);
+			return False;
+		}
+
+		for (p=old_style_key; *p; p++)
+			if (*p == ',') *p = '/';
+
+		data=(char *)secrets_fetch(old_style_key, &size);
+		if ((data == NULL) || (size < sizeof(old_style_pw))) {
+			DEBUG(0,("fetch_ldap_pw: neither ldap secret retrieved!\n"));
+			SAFE_FREE(old_style_key);
+			SAFE_FREE(*pw);
+			SAFE_FREE(*dn);
+			SAFE_FREE(data);
+			return False;
+		}
+
+		size = MIN(size, sizeof(fstring)-1);
+		strncpy(old_style_pw, data, size);
+		old_style_pw[size] = 0;
+
+		SAFE_FREE(data);
+
+		if (!secrets_store_ldap_pw(*dn, old_style_pw)) {
+			DEBUG(0,("fetch_ldap_pw: ldap secret could not be upgraded!\n"));
+			SAFE_FREE(old_style_key);
+			SAFE_FREE(*pw);
+			SAFE_FREE(*dn);
+			return False;
+		}
+		if (!secrets_delete_entry(old_style_key)) {
+			DEBUG(0,("fetch_ldap_pw: old ldap secret could not be deleted!\n"));
+		}
+
+		SAFE_FREE(old_style_key);
+
+		*pw = smb_xstrdup(old_style_pw);
+	}
+
+	return True;
+}
+
+/*******************************************************************************
+ Store a complete AFS keyfile into secrets.tdb.
+*******************************************************************************/
+
+bool secrets_store_afs_keyfile(const char *cell, const struct afs_keyfile *keyfile)
+{
+	fstring key;
+
+	if ((cell == NULL) || (keyfile == NULL))
+		return False;
+
+	if (ntohl(keyfile->nkeys) > SECRETS_AFS_MAXKEYS)
+		return False;
+
+	slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
+	return secrets_store(key, keyfile, sizeof(struct afs_keyfile));
+}
+
+/*******************************************************************************
+ Fetch the current (highest) AFS key from secrets.tdb
+*******************************************************************************/
+bool secrets_fetch_afs_key(const char *cell, struct afs_key *result)
+{
+	fstring key;
+	struct afs_keyfile *keyfile;
+	size_t size = 0;
+	uint32_t i;
+
+	slprintf(key, sizeof(key)-1, "%s/%s", SECRETS_AFS_KEYFILE, cell);
+
+	keyfile = (struct afs_keyfile *)secrets_fetch(key, &size);
+
+	if (keyfile == NULL)
+		return False;
+
+	if (size != sizeof(struct afs_keyfile)) {
+		SAFE_FREE(keyfile);
+		return False;
+	}
+
+	i = ntohl(keyfile->nkeys);
+
+	if (i > SECRETS_AFS_MAXKEYS) {
+		SAFE_FREE(keyfile);
+		return False;
+	}
+
+	*result = keyfile->entry[i-1];
+
+	result->kvno = ntohl(result->kvno);
+
+	SAFE_FREE(keyfile);
+
+	return True;
+}
+
+/******************************************************************************
+  When kerberos is not available, choose between anonymous or
+  authenticated connections.
+
+  We need to use an authenticated connection if DCs have the
+  RestrictAnonymous registry entry set > 0, or the "Additional
+  restrictions for anonymous connections" set in the win2k Local
+  Security Policy.
+
+  Caller to free() result in domain, username, password
+*******************************************************************************/
+void secrets_fetch_ipc_userpass(char **username, char **domain, char **password)
+{
+	*username = (char *)secrets_fetch(SECRETS_AUTH_USER, NULL);
+	*domain = (char *)secrets_fetch(SECRETS_AUTH_DOMAIN, NULL);
+	*password = (char *)secrets_fetch(SECRETS_AUTH_PASSWORD, NULL);
+
+	if (*username && **username) {
+
+		if (!*domain || !**domain)
+			*domain = smb_xstrdup(lp_workgroup());
+
+		if (!*password || !**password)
+			*password = smb_xstrdup("");
+
+		DEBUG(3, ("IPC$ connections done by user %s\\%s\n",
+			  *domain, *username));
+
+	} else {
+		DEBUG(3, ("IPC$ connections done anonymously\n"));
+		*username = smb_xstrdup("");
+		*domain = smb_xstrdup("");
+		*password = smb_xstrdup("");
+	}
+}
+
+bool secrets_store_generic(const char *owner, const char *key, const char *secret)
+{
+	char *tdbkey = NULL;
+	bool ret;
+
+	if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
+		DEBUG(0, ("asprintf failed!\n"));
+		return False;
+	}
+
+	ret = secrets_store(tdbkey, secret, strlen(secret)+1);
+
+	SAFE_FREE(tdbkey);
+	return ret;
+}
+
+/*******************************************************************
+ Find the ldap password.
+******************************************************************/
+
+char *secrets_fetch_generic(const char *owner, const char *key)
+{
+	char *secret = NULL;
+	char *tdbkey = NULL;
+
+	if (( ! owner) || ( ! key)) {
+		DEBUG(1, ("Invalid Parameters"));
+		return NULL;
+	}
+
+	if (asprintf(&tdbkey, "SECRETS/GENERIC/%s/%s", owner, key) < 0) {
+		DEBUG(0, ("Out of memory!\n"));
+		return NULL;
+	}
+
+	secret = (char *)secrets_fetch(tdbkey, NULL);
+	SAFE_FREE(tdbkey);
+
+	return secret;
+}
+