mirror of
https://github.com/samba-team/samba.git
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d65f0095c9
yet, but at least the request is understood by w2k3
Also modified pidl to allow multiple branches in a union to have the
same element. This is used in netlogon.
(This used to be commit 983c0e9683
)
156 lines
4.6 KiB
C
156 lines
4.6 KiB
C
/*
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Unix SMB/CIFS implementation.
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code to manipulate domain credentials
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Copyright (C) Andrew Tridgell 1997-2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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/*
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initialise the credentials state
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this call is made after the netr_ServerReqChallenge call
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*/
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static void creds_init(struct netr_CredentialState *creds,
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const struct netr_Credential *client_challenge,
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const struct netr_Credential *server_challenge,
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const uint8 machine_password[16])
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{
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struct netr_Credential time_cred;
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uint32 sum[2];
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uint8 sum2[8];
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sum[0] = IVAL(client_challenge->data, 0) + IVAL(server_challenge->data, 0);
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sum[1] = IVAL(client_challenge->data, 4) + IVAL(server_challenge->data, 4);
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SIVAL(sum2,0,sum[0]);
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SIVAL(sum2,4,sum[1]);
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cred_hash1(creds->session_key, sum2, machine_password);
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creds->sequence = time(NULL);
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SIVAL(time_cred.data, 0, IVAL(client_challenge->data, 0));
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SIVAL(time_cred.data, 4, IVAL(client_challenge->data, 4));
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cred_hash2(creds->client.data, time_cred.data, creds->session_key);
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SIVAL(time_cred.data, 0, IVAL(server_challenge->data, 0));
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SIVAL(time_cred.data, 4, IVAL(server_challenge->data, 4));
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cred_hash2(creds->server.data, time_cred.data, creds->session_key);
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creds->seed = creds->client;
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}
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/*
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step the credentials to the next element in the chain, updating the
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current client and server credentials and the seed
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*/
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static void creds_step(struct netr_CredentialState *creds)
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{
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struct netr_Credential time_cred;
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creds->sequence += 2;
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DEBUG(5,("\tseed %08x:%08x\n",
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IVAL(creds->seed.data, 0), IVAL(creds->seed.data, 4)));
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SIVAL(time_cred.data, 0, IVAL(creds->seed.data, 0) + creds->sequence);
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SIVAL(time_cred.data, 4, IVAL(creds->seed.data, 4));
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DEBUG(5,("\tseed+time %08x:%08x\n", IVAL(time_cred.data, 0), IVAL(time_cred.data, 4)));
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cred_hash2(creds->client.data, time_cred.data, creds->session_key);
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DEBUG(5,("\tCLIENT %08x:%08x\n",
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IVAL(creds->client.data, 0), IVAL(creds->client.data, 4)));
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SIVAL(time_cred.data, 0, IVAL(creds->seed.data, 0) + creds->sequence + 1);
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SIVAL(time_cred.data, 4, IVAL(creds->seed.data, 4));
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DEBUG(5,("\tseed+time+1 %08x:%08x\n",
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IVAL(time_cred.data, 0), IVAL(time_cred.data, 4)));
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cred_hash2(creds->server.data, time_cred.data, creds->session_key);
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DEBUG(5,("\tSERVER %08x:%08x\n",
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IVAL(creds->server.data, 0), IVAL(creds->server.data, 4)));
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creds->seed = time_cred;
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}
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/*****************************************************************
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The above functions are common to the client and server interface
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next comes the client specific functions
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******************************************************************/
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/*
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initialise the credentials chain and return the first client
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credentials
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*/
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void creds_client_init(struct netr_CredentialState *creds,
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const struct netr_Credential *client_challenge,
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const struct netr_Credential *server_challenge,
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const uint8 machine_password[16],
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struct netr_Credential *initial_credential)
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{
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creds_init(creds, client_challenge, server_challenge, machine_password);
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*initial_credential = creds->client;
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}
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/*
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check that a credentials reply from a server is correct
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*/
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BOOL creds_client_check(struct netr_CredentialState *creds,
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const struct netr_Credential *received_credentials)
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{
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if (memcmp(received_credentials->data, creds->server.data, 8) != 0) {
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DEBUG(2,("credentials check failed\n"));
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return False;
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}
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return True;
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}
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/*
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produce the next authenticator in the sequence ready to send to
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the server
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*/
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void creds_client_authenticator(struct netr_CredentialState *creds,
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struct netr_Authenticator *next)
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{
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creds_step(creds);
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next->cred = creds->client;
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next->timestamp = creds->sequence;
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}
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/*
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encrypt a 16 byte password buffer using the session key
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*/
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void creds_client_encrypt(struct netr_CredentialState *creds, struct netr_Password *pass)
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{
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struct netr_Password tmp;
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cred_hash3(tmp.data, pass->data, creds->session_key, 1);
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*pass = tmp;
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}
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