source: branches/samba-3.5.x/source4/libnet/libnet_samdump_keytab.c

/* 
   Unix SMB/CIFS implementation.
   
   Extract kerberos keys from a remote SamSync server

   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   
   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/>.
*/


#include "includes.h"
#include "libnet/libnet.h"
#include "system/kerberos.h"
#include "auth/credentials/credentials.h"
#include "auth/credentials/credentials_krb5.h"
#include "param/param.h"
#include "lib/events/events.h"

static NTSTATUS samdump_keytab_handle_user(TALLOC_CTX *mem_ctx,
                                           struct tevent_context *event_ctx,
                                           struct loadparm_context *lp_ctx,
                                            const char *keytab_name,
                                            struct netr_DELTA_ENUM *delta) 
{
        struct netr_DELTA_USER *user = delta->delta_union.user;
        const char *username = user->account_name.string;
        struct cli_credentials *credentials;
        int ret;

        if (!user->nt_password_present) {
                /* We can't do anything here */
                return NT_STATUS_OK;
        }

        credentials = cli_credentials_init(mem_ctx);
        if (!credentials) {
                return NT_STATUS_NO_MEMORY;
        }
        cli_credentials_set_conf(credentials, lp_ctx);
        cli_credentials_set_username(credentials, username, CRED_SPECIFIED);

        /* We really should consult ldap in the main SamSync code, and
         * pass a value in here */
        cli_credentials_set_kvno(credentials, 0);
        cli_credentials_set_nt_hash(credentials, &user->ntpassword, CRED_SPECIFIED);
        ret = cli_credentials_set_keytab_name(credentials, event_ctx, lp_ctx, keytab_name, CRED_SPECIFIED);
        if (ret) {
                return NT_STATUS_UNSUCCESSFUL;
        }

        ret = cli_credentials_update_keytab(credentials, event_ctx, lp_ctx);
        if (ret) {
                return NT_STATUS_UNSUCCESSFUL;
        }
        
        return NT_STATUS_OK;
}

struct libnet_samdump_keytab_data {
        const char *keytab_name;
        struct tevent_context *ev_ctx;
        struct loadparm_context *lp_ctx;
};

static NTSTATUS libnet_samdump_keytab_fn(TALLOC_CTX *mem_ctx,
                                         void *private_data,
                                         enum netr_SamDatabaseID database,
                                         struct netr_DELTA_ENUM *delta,
                                         char **error_string)
{
        NTSTATUS nt_status = NT_STATUS_OK;
        struct libnet_samdump_keytab_data *data = private_data;
        *error_string = NULL;
        switch (delta->delta_type) {
        case NETR_DELTA_USER:
        {
                /* not interested in builtin users */
                if (database == SAM_DATABASE_DOMAIN) {
                        nt_status = samdump_keytab_handle_user(mem_ctx, 
                                                               data->ev_ctx,
                                                               data->lp_ctx,
                                                               data->keytab_name,
                                                               delta);
                        break;
                }
        }
        default:
                /* Can't dump them all right now */
                break;
        }
        return nt_status;
}

NTSTATUS libnet_SamDump_keytab(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, struct libnet_SamDump_keytab *r)
{
        NTSTATUS nt_status;
        struct libnet_samdump_keytab_data data;
        struct libnet_SamSync r2;

        data.keytab_name = r->in.keytab_name;
        data.ev_ctx = ctx->event_ctx;
        data.lp_ctx = ctx->lp_ctx;

        r2.out.error_string            = NULL;
        r2.in.binding_string           = r->in.binding_string;
        r2.in.init_fn                  = NULL;
        r2.in.delta_fn                 = libnet_samdump_keytab_fn;
        r2.in.fn_ctx                   = &data;
        r2.in.machine_account          = r->in.machine_account;
        nt_status                      = libnet_SamSync_netlogon(ctx, mem_ctx, &r2);
        r->out.error_string            = r2.out.error_string;
        talloc_steal(mem_ctx, r->out.error_string);

        if (!NT_STATUS_IS_OK(nt_status)) {
                return nt_status;
        }

        return nt_status;
}