source4/libnet/libnet_vampire.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21
  22 #include "includes.h"
  23 #include "libnet/libnet.h"
  24 #include "librpc/gen_ndr/ndr_netlogon.h"
  25 #include "librpc/gen_ndr/ndr_samr.h"
  26
  27 static BOOL vampire_samdump_handle_user(TALLOC_CTX *mem_ctx,
  28                                         struct creds_CredentialState *creds,
  29                                         struct netr_DELTA_ENUM *delta)
  30 {
  31         uint32_t rid = delta->delta_id_union.rid;
  32         struct netr_DELTA_USER *user = delta->delta_union.user;
  33         struct samr_Password lm_hash;
  34         struct samr_Password nt_hash;
  35         struct samr_Password *lm_hash_p = NULL;
  36         struct samr_Password *nt_hash_p = NULL;
  37         const char *username = user->account_name.string;
  38         char *hex_lm_password;
  39         char *hex_nt_password;
  40
  41         NTSTATUS nt_status;
  42
  43         if (user->lm_password_present) {
  44                 sam_rid_crypt(rid, user->lmpassword.hash, lm_hash.hash, 0);
  45                 lm_hash_p = &lm_hash;
  46         }
  47         if (user->nt_password_present) {
  48                 sam_rid_crypt(rid, user->ntpassword.hash, nt_hash.hash, 0);
  49                 nt_hash_p = &nt_hash;
  50         }
  51
  52         if (user->user_private_info.SensitiveData) {
  53                 DATA_BLOB data;
  54                 struct netr_USER_KEYS keys;
  55                 data.data = user->user_private_info.SensitiveData;
  56                 data.length = user->user_private_info.DataLength;
  57                 creds_arcfour_crypt(creds, data.data, data.length);
  58                 nt_status = ndr_pull_struct_blob(&data, mem_ctx, &keys, (ndr_pull_flags_fn_t)ndr_pull_netr_USER_KEYS);
  59                 if (NT_STATUS_IS_OK(nt_status)) {
  60                         if (keys.keys.keys2.lmpassword.length == 16) {
  61                                 sam_rid_crypt(rid, keys.keys.keys2.lmpassword.pwd.hash, lm_hash.hash, 0);
  62                                 lm_hash_p = &lm_hash;
  63                         }
  64                         if (keys.keys.keys2.ntpassword.length == 16) {
  65                                 sam_rid_crypt(rid, keys.keys.keys2.ntpassword.pwd.hash, nt_hash.hash, 0);
  66                                 nt_hash_p = &nt_hash;
  67                         }
  68                 } else {
  69                         printf("Failed to parse Sensitive Data for %s:\n", username);
  70                         dump_data(10, data.data, data.length);
  71                         return False;
  72                 }
  73         }
  74
  75         hex_lm_password = smbpasswd_sethexpwd(mem_ctx, lm_hash_p, user->acct_flags);
  76         hex_nt_password = smbpasswd_sethexpwd(mem_ctx, nt_hash_p, user->acct_flags);
  77
  78         printf("%s:%d:%s:%s:%s:LCT-%08X\n", username,
  79                rid, hex_lm_password, hex_nt_password,
  80                smbpasswd_encode_acb_info(mem_ctx, user->acct_flags),
  81                (unsigned int)nt_time_to_unix(user->last_password_change));
  82
  83         return True;
  84 }
  85
  86
  87
  88 static NTSTATUS libnet_SamDump_netlogon(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, union libnet_SamDump *r)
  89 {
  90         NTSTATUS nt_status;
  91         TALLOC_CTX *loop_ctx, *delta_ctx;
  92         struct creds_CredentialState *creds;
  93         struct netr_DatabaseSync dbsync;
  94         struct cli_credentials *machine_account;
  95         struct dcerpc_binding *b;
  96         struct dcerpc_pipe *p;
  97
  98         /* TODO: This is bogus */
  99         const char **bindings = lp_passwordserver();
 100         const char *binding;
 101
 102         if (bindings && bindings[0]) {
 103                 binding = bindings[0];
 104         }
 105
 106         machine_account = cli_credentials_init(mem_ctx);
 107         if (!machine_account) {
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110
 111         cli_credentials_set_conf(machine_account);
 112         nt_status = cli_credentials_set_machine_account(machine_account);
 113
 114         if (!NT_STATUS_IS_OK(nt_status)) {
 115                 r->netlogon.error_string = talloc_strdup(mem_ctx, "Could not obtain machine account password - are we joined to the domain?");
 116                 return nt_status;
 117         }
 118
 119         if (cli_credentials_get_secure_channel_type(machine_account) != SEC_CHAN_BDC) {
 120                 r->netlogon.error_string
 121                         = talloc_asprintf(mem_ctx,
 122                                           "Our join to domain %s is not as a BDC (%d), please rejoin as a BDC",
 123                                           cli_credentials_get_secure_channel_type(machine_account),
 124                                           cli_credentials_get_domain(machine_account));
 125                 return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 126         }
 127
 128         /* Connect to DC (take a binding string for now) */
 129
 130         nt_status = dcerpc_parse_binding(mem_ctx, binding, &b);
 131         if (!NT_STATUS_IS_OK(nt_status)) {
 132                 r->netlogon.error_string = talloc_asprintf(mem_ctx, "Bad binding string %s\n", binding);
 133                 return NT_STATUS_INVALID_PARAMETER;
 134         }
 135
 136         /* We like schannel */
 137         b->flags &= ~DCERPC_AUTH_OPTIONS;
 138         b->flags |= DCERPC_SCHANNEL | DCERPC_SEAL | DCERPC_SCHANNEL_128;
 139
 140         /* Setup schannel */
 141         nt_status = dcerpc_pipe_connect_b(mem_ctx, &p, b,
 142                                           DCERPC_NETLOGON_UUID,
 143                                           DCERPC_NETLOGON_VERSION,
 144                                           machine_account);
 145
 146         if (!NT_STATUS_IS_OK(nt_status)) {
 147                 return nt_status;
 148         }
 149
 150         /* call domain logon */
 151
 152         nt_status = dcerpc_schannel_creds(p->conn->security_state.generic_state, mem_ctx, &creds);
 153         if (!NT_STATUS_IS_OK(nt_status)) {
 154                 return nt_status;
 155         }
 156
 157         dbsync.in.logon_server = talloc_asprintf(mem_ctx, "\\\\%s", dcerpc_server_name(p));
 158         dbsync.in.computername = cli_credentials_get_workstation(machine_account);
 159         dbsync.in.preferredmaximumlength = (uint32_t)-1;
 160         ZERO_STRUCT(dbsync.in.return_authenticator);
 161
 162         dbsync.in.sync_context = 0;
 163         dbsync.in.database_id = SAM_DATABASE_DOMAIN;
 164
 165         do {
 166                 int d;
 167                 loop_ctx = talloc_named(mem_ctx, 0, "DatabaseSync loop context");
 168                 creds_client_authenticator(creds, &dbsync.in.credential);
 169
 170                 nt_status = dcerpc_netr_DatabaseSync(p, loop_ctx, &dbsync);
 171                 if (!NT_STATUS_IS_OK(nt_status) &&
 172                     !NT_STATUS_EQUAL(nt_status, STATUS_MORE_ENTRIES)) {
 173                         printf("DatabaseSync - %s\n", nt_errstr(nt_status));
 174                         return nt_status;
 175                 }
 176
 177                 if (!creds_client_check(creds, &dbsync.out.return_authenticator.cred)) {
 178                         printf("Credential chaining failed\n");
 179                 }
 180
 181                 dbsync.in.sync_context = dbsync.out.sync_context;
 182
 183                 for (d=0; d < dbsync.out.delta_enum_array->num_deltas; d++) {
 184                         delta_ctx = talloc_named(loop_ctx, 0, "DatabaseSync delta context");
 185                         switch (dbsync.out.delta_enum_array->delta_enum[d].delta_type) {
 186                         case NETR_DELTA_USER:
 187                                 if (!vampire_samdump_handle_user(delta_ctx,
 188                                                                  creds,
 189                                                                  &dbsync.out.delta_enum_array->delta_enum[d])) {
 190                                         return NT_STATUS_INVALID_PARAMETER;
 191                                 }
 192                                 break;
 193                         }
 194                         talloc_free(delta_ctx);
 195                 }
 196                 talloc_free(loop_ctx);
 197         } while (NT_STATUS_EQUAL(nt_status, STATUS_MORE_ENTRIES));
 198         return NT_STATUS_OK;
 199 }
 200
 201 NTSTATUS libnet_SamDump_generic(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, union libnet_SamDump *r)
 202 {
 203         NTSTATUS nt_status;
 204         union libnet_SamDump r2;
 205
 206         r2.generic.level = LIBNET_SAMDUMP_NETLOGON;
 207         r2.generic.error_string = NULL;
 208         nt_status = libnet_SamDump(ctx, mem_ctx, &r2);
 209         r->generic.error_string = r2.netlogon.error_string;
 210
 211
 212         return nt_status;
 213 }
 214
 215 NTSTATUS libnet_SamDump(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, union libnet_SamDump *r)
 216 {
 217         switch (r->generic.level) {
 218         case LIBNET_SAMDUMP_GENERIC:
 219                 return libnet_SamDump_generic(ctx, mem_ctx, r);
 220         case LIBNET_SAMDUMP_NETLOGON:
 221                 return libnet_SamDump_netlogon(ctx, mem_ctx, r);
 222         }
 223
 224         return NT_STATUS_INVALID_LEVEL;
 225 }