source: branches/samba-3.3.x/source/winbindd/winbindd_creds.c

/*
   Unix SMB/CIFS implementation.

   Winbind daemon - cached credentials funcions

   Copyright (C) Guenther Deschner 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 "winbindd.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND

#define MAX_CACHED_LOGINS 10

NTSTATUS winbindd_get_creds(struct winbindd_domain *domain,
                            TALLOC_CTX *mem_ctx,
                            const DOM_SID *sid,
                            struct netr_SamInfo3 **info3,
                            const uint8 *cached_nt_pass[NT_HASH_LEN],
                            const uint8 *cred_salt[NT_HASH_LEN])
{
        struct netr_SamInfo3 *info;
        NTSTATUS status;

        status = wcache_get_creds(domain, mem_ctx, sid, cached_nt_pass, cred_salt);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        info = netsamlogon_cache_get(mem_ctx, sid);
        if (info == NULL) {
                return NT_STATUS_OBJECT_NAME_NOT_FOUND;
        }

        *info3 = info;

        return NT_STATUS_OK;
}


NTSTATUS winbindd_store_creds(struct winbindd_domain *domain,
                              TALLOC_CTX *mem_ctx, 
                              const char *user, 
                              const char *pass, 
                              struct netr_SamInfo3 *info3,
                              const DOM_SID *user_sid)
{
        NTSTATUS status;
        uchar nt_pass[NT_HASH_LEN];
        DOM_SID cred_sid;

        if (info3 != NULL) {
        
                DOM_SID sid;
                sid_copy(&sid, info3->base.domain_sid);
                sid_append_rid(&sid, info3->base.rid);
                sid_copy(&cred_sid, &sid);
                info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
                
        } else if (user_sid != NULL) {
        
                sid_copy(&cred_sid, user_sid);
                
        } else if (user != NULL) {
        
                /* do lookup ourself */

                enum lsa_SidType type;
                
                if (!lookup_cached_name(mem_ctx,
                                        domain->name,
                                        user,
                                        &cred_sid,
                                        &type)) {
                        return NT_STATUS_NO_SUCH_USER;
                }
        } else {
                return NT_STATUS_INVALID_PARAMETER;
        }
                
        if (pass) {

                int count = 0;

                status = wcache_count_cached_creds(domain, &count);
                if (!NT_STATUS_IS_OK(status)) {
                        return status;
                }

                DEBUG(11,("we have %d cached creds\n", count));

                if (count + 1 > MAX_CACHED_LOGINS) {

                        DEBUG(10,("need to delete the oldest cached login\n"));

                        status = wcache_remove_oldest_cached_creds(domain, &cred_sid);
                        if (!NT_STATUS_IS_OK(status)) {
                                DEBUG(10,("failed to remove oldest cached cred: %s\n", 
                                        nt_errstr(status)));
                                return status;
                        }
                }

                E_md4hash(pass, nt_pass);

                dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);

                status = wcache_save_creds(domain, mem_ctx, &cred_sid, nt_pass);
                if (!NT_STATUS_IS_OK(status)) {
                        return status;
                }
        }

        if (info3 != NULL && user != NULL) {
                if (!netsamlogon_cache_store(user, info3)) {
                        return NT_STATUS_ACCESS_DENIED;
                }
        }

        return NT_STATUS_OK;
}

NTSTATUS winbindd_update_creds_by_info3(struct winbindd_domain *domain,
                                        TALLOC_CTX *mem_ctx,
                                        const char *user,
                                        const char *pass,
                                        struct netr_SamInfo3 *info3)
{
        return winbindd_store_creds(domain, mem_ctx, user, pass, info3, NULL);
}

NTSTATUS winbindd_update_creds_by_sid(struct winbindd_domain *domain,
                                      TALLOC_CTX *mem_ctx,
                                      const DOM_SID *sid,
                                      const char *pass)
{
        return winbindd_store_creds(domain, mem_ctx, NULL, pass, NULL, sid);
}

NTSTATUS winbindd_update_creds_by_name(struct winbindd_domain *domain,
                                       TALLOC_CTX *mem_ctx,
                                       const char *user,
                                       const char *pass)
{
        return winbindd_store_creds(domain, mem_ctx, user, pass, NULL, NULL);
}