| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | Copyright (C) Guenther Deschner 2009
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 3 of the License, or
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| 8 | (at your option) any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 17 | */
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| 18 |
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| 19 | #include "includes.h"
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| 20 | #include "../libcli/auth/libcli_auth.h"
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| 21 | #include "../libcli/auth/schannel_state.h"
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| 22 |
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| 23 | /******************************************************************************
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| 24 | Open or create the schannel session store tdb.
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| 25 | *******************************************************************************/
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| 26 |
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| 27 | #define SCHANNEL_STORE_VERSION_1 1
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| 28 | #define SCHANNEL_STORE_VERSION_2 2 /* should not be used */
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| 29 | #define SCHANNEL_STORE_VERSION_CURRENT SCHANNEL_STORE_VERSION_1
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| 30 |
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| 31 | TDB_CONTEXT *open_schannel_session_store(TALLOC_CTX *mem_ctx)
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| 32 | {
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| 33 | TDB_DATA vers;
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| 34 | uint32 ver;
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| 35 | TDB_CONTEXT *tdb_sc = NULL;
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| 36 | char *fname = talloc_asprintf(mem_ctx, "%s/schannel_store.tdb", lp_private_dir());
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| 37 |
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| 38 | if (!fname) {
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| 39 | return NULL;
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| 40 | }
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| 41 |
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| 42 | tdb_sc = tdb_open_log(fname, 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
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| 43 |
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| 44 | if (!tdb_sc) {
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| 45 | DEBUG(0,("open_schannel_session_store: Failed to open %s\n", fname));
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| 46 | TALLOC_FREE(fname);
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| 47 | return NULL;
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| 48 | }
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| 49 |
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| 50 | again:
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| 51 | vers = tdb_fetch_bystring(tdb_sc, "SCHANNEL_STORE_VERSION");
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| 52 | if (vers.dptr == NULL) {
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| 53 | /* First opener, no version. */
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| 54 | SIVAL(&ver,0,SCHANNEL_STORE_VERSION_CURRENT);
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| 55 | vers.dptr = (uint8 *)&ver;
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| 56 | vers.dsize = 4;
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| 57 | tdb_store_bystring(tdb_sc, "SCHANNEL_STORE_VERSION", vers, TDB_REPLACE);
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| 58 | vers.dptr = NULL;
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| 59 | } else if (vers.dsize == 4) {
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| 60 | ver = IVAL(vers.dptr,0);
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| 61 | if (ver == SCHANNEL_STORE_VERSION_2) {
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| 62 | DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
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| 63 | (int)ver, fname ));
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| 64 | tdb_wipe_all(tdb_sc);
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| 65 | goto again;
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| 66 | }
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| 67 | if (ver != SCHANNEL_STORE_VERSION_CURRENT) {
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| 68 | DEBUG(0,("open_schannel_session_store: wrong version number %d in %s\n",
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| 69 | (int)ver, fname ));
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| 70 | tdb_close(tdb_sc);
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| 71 | tdb_sc = NULL;
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| 72 | }
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| 73 | } else {
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| 74 | tdb_close(tdb_sc);
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| 75 | tdb_sc = NULL;
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| 76 | DEBUG(0,("open_schannel_session_store: wrong version number size %d in %s\n",
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| 77 | (int)vers.dsize, fname ));
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| 78 | }
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| 79 |
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| 80 | SAFE_FREE(vers.dptr);
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| 81 | TALLOC_FREE(fname);
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| 82 |
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| 83 | return tdb_sc;
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| 84 | }
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| 85 |
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| 86 | /******************************************************************************
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| 87 | Wrapper around schannel_fetch_session_key_tdb()
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| 88 | Note we must be root here.
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| 89 | *******************************************************************************/
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| 90 |
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| 91 | NTSTATUS schannel_fetch_session_key(TALLOC_CTX *mem_ctx,
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| 92 | const char *computer_name,
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| 93 | struct netlogon_creds_CredentialState **pcreds)
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| 94 | {
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| 95 | struct tdb_context *tdb;
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| 96 | NTSTATUS status;
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| 97 |
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| 98 | tdb = open_schannel_session_store(mem_ctx);
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| 99 | if (!tdb) {
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| 100 | return NT_STATUS_ACCESS_DENIED;
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| 101 | }
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| 102 |
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| 103 | status = schannel_fetch_session_key_tdb(tdb, mem_ctx, computer_name, pcreds);
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| 104 |
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| 105 | tdb_close(tdb);
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| 106 |
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| 107 | return status;
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| 108 | }
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| 109 |
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| 110 | /******************************************************************************
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| 111 | Wrapper around schannel_store_session_key_tdb()
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| 112 | Note we must be root here.
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| 113 | *******************************************************************************/
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| 114 |
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| 115 | NTSTATUS schannel_store_session_key(TALLOC_CTX *mem_ctx,
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| 116 | struct netlogon_creds_CredentialState *creds)
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| 117 | {
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| 118 | struct tdb_context *tdb;
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| 119 | NTSTATUS status;
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| 120 |
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| 121 | tdb = open_schannel_session_store(mem_ctx);
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| 122 | if (!tdb) {
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| 123 | return NT_STATUS_ACCESS_DENIED;
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| 124 | }
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| 125 |
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| 126 | status = schannel_store_session_key_tdb(tdb, mem_ctx, creds);
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| 127 |
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| 128 | tdb_close(tdb);
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| 129 |
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| 130 | return status;
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| 131 | }
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