source4/libnet/libnet_passwd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher      2004
   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  * 1. connect to the SAMR pipe of *our* PDC
  23  * 2. try samr_ChangePassword3
  24  */
  25 static NTSTATUS libnet_ChangePassword_rpc(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct net_ChangePassword *r)
  26 {
  27         NTSTATUS status;
  28         struct dcerpc_pipe *p = NULL;
  29         struct samr_ChangePasswordUser3 pw3;
  30         struct samr_Name server, account;
  31         struct samr_CryptPassword nt_pass, lm_pass;
  32         struct samr_Password nt_verifier, lm_verifier;
  33         uint8_t old_nt_hash[16], new_nt_hash[16];
  34         uint8_t old_lm_hash[16], new_lm_hash[16];
  35
  36         /* connect to the SAMR pipe of the */
  37         status = libnet_rpc_connect_pdc(ctx, mem_ctx,
  38                                         r->rpc.in.domain_name,
  39                                         DCERPC_SAMR_NAME,
  40                                         DCERPC_SAMR_UUID,
  41                                         DCERPC_SAMR_VERSION,
  42                                         &p);
  43         if (!NT_STATUS_IS_OK(status)) {
  44                 r->rpc.out.error_string = talloc_asprintf(mem_ctx,
  45                                                 "Connection to SAMR pipe of PDC of domain '%s' failed\n",
  46                                                 r->rpc.in.domain_name);
  47                 return status;
  48         }
  49
  50         server.name = talloc_asprintf(mem_ctx, "\\\\%s", dcerpc_server_name(p));
  51         init_samr_Name(&account, r->rpc.in.account_name);
  52
  53         E_md4hash(r->rpc.in.oldpassword, old_nt_hash);
  54         E_md4hash(r->rpc.in.newpassword, new_nt_hash);
  55
  56         E_deshash(r->rpc.in.oldpassword, old_lm_hash);
  57         E_deshash(r->rpc.in.newpassword, new_lm_hash);
  58
  59         encode_pw_buffer(lm_pass.data, r->rpc.in.newpassword, STR_UNICODE);
  60         arcfour_crypt(lm_pass.data, old_nt_hash, 516);
  61         E_old_pw_hash(new_lm_hash, old_lm_hash, lm_verifier.hash);
  62
  63         encode_pw_buffer(nt_pass.data,  r->rpc.in.newpassword, STR_UNICODE);
  64         arcfour_crypt(nt_pass.data, old_nt_hash, 516);
  65         E_old_pw_hash(new_nt_hash, old_nt_hash, nt_verifier.hash);
  66
  67         pw3.in.server = &server;
  68         pw3.in.account = &account;
  69         pw3.in.nt_password = &nt_pass;
  70         pw3.in.nt_verifier = &nt_verifier;
  71         pw3.in.lm_change = 1;
  72         pw3.in.lm_password = &lm_pass;
  73         pw3.in.lm_verifier = &lm_verifier;
  74         pw3.in.password3 = NULL;
  75
  76         status = dcerpc_samr_ChangePassword3(p, mem_ctx, &pw3);
  77         if (!NT_STATUS_IS_OK(status)) {
  78                 r->rpc.out.error_string = talloc_asprintf(mem_ctx,
  79                                                 "ChangePassword3 failed: %s\n",nt_errstr(status);
  80                 return status;
  81         }
  82
  83         if (!NT_STATUS_IS_OK(r->rpc.out.result)) {
  84                 r->rpc.out.error_string = talloc_asprintf(mem_ctx,
  85                                                 "ChangePassword3 for '%s\\%s' failed: %s\n",
  86                                                 r->rpc.in.domain_name, r->rpc.in.account_name,
  87                                                 nt_errstr(status));
  88                                                 /* TODO: give the reason of the reject */
  89                 return status;
  90
  91         }
  92
  93         dcerpc_diconnect(&p);
  94
  95         return NT_STATUS_OK;
  96 }
  97
  98 static NTSTATUS libnet_ChangePassword_generic(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct net_ChangePassword *r)
  99 {
 100         return NT_STATUS_NOT_IMPLEMTED;
 101 }
 102
 103 NTSTATUS libnet_ChangePassword(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct net_ChangePassword *r)
 104 {
 105         switch (r->generic.level) {
 106                 case LIBNET_CHANGE_PASSWORD_GENERIC:
 107                         return libnet_ChangePassword_generic(ctx, mem_ctx, r);
 108                 case LIBNET_CHANGE_PASSWORD_RPC:
 109                         return libnet_ChangePassword_rpc(ctx, mem_ctx, r);
 110                 case LIBNET_CHANGE_PASSWORD_ADS:
 111                         return NT_STATUS_NOT_IMPLEMTED;
 112                 case LIBNET_CHANGE_PASSWORD_RAP:
 113                         return NT_STATUS_NOT_IMPLEMTED;
 114         }
 115
 116         return NT_STATUS_INVALID_LEVEL;
 117 }