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s3-winbind: share a common winbind_samlogon_retry_loop().
Guenther Autobuild-User: Günther Deschner <gd@samba.org> Autobuild-Date: Wed Jan 26 12:41:14 CET 2011 on sn-devel-104
This commit is contained in:
Günther Deschner
parent
035a0d2fb3
commit
abb7c07de5
@ -1123,31 +1123,135 @@ static NTSTATUS winbindd_dual_auth_passdb(TALLOC_CTX *mem_ctx,
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return status;
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}
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typedef NTSTATUS (*netlogon_fn_t)(struct rpc_pipe_client *cli,
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TALLOC_CTX *mem_ctx,
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uint32 logon_parameters,
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const char *server,
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const char *username,
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const char *domain,
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const char *workstation,
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const uint8 chal[8],
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DATA_BLOB lm_response,
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DATA_BLOB nt_response,
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struct netr_SamInfo3 **info3);
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static NTSTATUS winbind_samlogon_retry_loop(struct winbindd_domain *domain,
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TALLOC_CTX *mem_ctx,
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uint32_t logon_parameters,
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const char *server,
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const char *username,
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const char *domainname,
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const char *workstation,
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const uint8_t chal[8],
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DATA_BLOB lm_response,
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DATA_BLOB nt_response,
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struct netr_SamInfo3 **info3)
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{
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int attempts = 0;
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bool retry = false;
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NTSTATUS result;
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do {
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struct rpc_pipe_client *netlogon_pipe;
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ZERO_STRUCTP(info3);
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retry = false;
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result = cm_connect_netlogon(domain, &netlogon_pipe);
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if (!NT_STATUS_IS_OK(result)) {
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DEBUG(3,("could not open handle to NETLOGON pipe (error: %s)\n",
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nt_errstr(result)));
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return result;
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}
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/* It is really important to try SamLogonEx here,
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* because in a clustered environment, we want to use
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* one machine account from multiple physical
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* computers.
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*
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* With a normal SamLogon call, we must keep the
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* credentials chain updated and intact between all
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* users of the machine account (which would imply
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* cross-node communication for every NTLM logon).
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*
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* (The credentials chain is not per NETLOGON pipe
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* connection, but globally on the server/client pair
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* by machine name).
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*
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* When using SamLogonEx, the credentials are not
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* supplied, but the session key is implied by the
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* wrapping SamLogon context.
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*
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* -- abartlet 21 April 2008
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*/
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if (domain->can_do_samlogon_ex) {
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result = rpccli_netlogon_sam_network_logon_ex(
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netlogon_pipe,
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mem_ctx,
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0,
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server, /* server name */
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username, /* user name */
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domainname, /* target domain */
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workstation, /* workstation */
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chal,
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lm_response,
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nt_response,
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info3);
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} else {
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result = rpccli_netlogon_sam_network_logon(
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netlogon_pipe,
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mem_ctx,
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0,
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server, /* server name */
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username, /* user name */
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domainname, /* target domain */
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workstation, /* workstation */
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chal,
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lm_response,
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nt_response,
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info3);
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}
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attempts += 1;
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if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
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&& domain->can_do_samlogon_ex) {
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DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
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"retrying with NetSamLogon\n"));
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domain->can_do_samlogon_ex = false;
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retry = true;
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continue;
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}
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/* We have to try a second time as cm_connect_netlogon
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might not yet have noticed that the DC has killed
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our connection. */
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if (!rpccli_is_connected(netlogon_pipe)) {
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retry = true;
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continue;
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}
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/* if we get access denied, a possible cause was that we had
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and open connection to the DC, but someone changed our
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machine account password out from underneath us using 'net
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rpc changetrustpw' */
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if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
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DEBUG(3,("winbindd_pam_auth: sam_logon returned "
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"ACCESS_DENIED. Maybe the trust account "
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"password was changed and we didn't know it. "
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"Killing connections to domain %s\n",
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domainname));
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invalidate_cm_connection(&domain->conn);
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retry = true;
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}
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} while ( (attempts < 2) && retry );
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return result;
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}
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static NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
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struct winbindd_cli_state *state,
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struct netr_SamInfo3 **info3)
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{
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struct rpc_pipe_client *netlogon_pipe;
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uchar chal[8];
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DATA_BLOB lm_resp;
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DATA_BLOB nt_resp;
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int attempts = 0;
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unsigned char local_nt_response[24];
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fstring name_domain, name_user;
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bool retry;
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NTSTATUS result;
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struct netr_SamInfo3 *my_info3 = NULL;
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@ -1207,91 +1311,20 @@ static NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
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/* check authentication loop */
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do {
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netlogon_fn_t logon_fn;
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ZERO_STRUCTP(my_info3);
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retry = false;
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result = cm_connect_netlogon(domain, &netlogon_pipe);
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if (!NT_STATUS_IS_OK(result)) {
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DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
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goto done;
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}
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/* It is really important to try SamLogonEx here,
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* because in a clustered environment, we want to use
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* one machine account from multiple physical
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* computers.
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*
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* With a normal SamLogon call, we must keep the
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* credentials chain updated and intact between all
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* users of the machine account (which would imply
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* cross-node communication for every NTLM logon).
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*
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* (The credentials chain is not per NETLOGON pipe
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* connection, but globally on the server/client pair
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* by machine name).
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*
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* When using SamLogonEx, the credentials are not
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* supplied, but the session key is implied by the
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* wrapping SamLogon context.
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*
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* -- abartlet 21 April 2008
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*/
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logon_fn = domain->can_do_samlogon_ex
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? rpccli_netlogon_sam_network_logon_ex
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: rpccli_netlogon_sam_network_logon;
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result = logon_fn(netlogon_pipe,
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state->mem_ctx,
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0,
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domain->dcname, /* server name */
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name_user, /* user name */
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name_domain, /* target domain */
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global_myname(), /* workstation */
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chal,
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lm_resp,
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nt_resp,
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&my_info3);
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attempts += 1;
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if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
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&& domain->can_do_samlogon_ex) {
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DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
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"retrying with NetSamLogon\n"));
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domain->can_do_samlogon_ex = false;
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retry = true;
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continue;
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}
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/* We have to try a second time as cm_connect_netlogon
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might not yet have noticed that the DC has killed
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our connection. */
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if (!rpccli_is_connected(netlogon_pipe)) {
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retry = true;
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continue;
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}
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/* if we get access denied, a possible cause was that we had
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and open connection to the DC, but someone changed our
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machine account password out from underneath us using 'net
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rpc changetrustpw' */
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if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
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DEBUG(3,("winbindd_pam_auth: sam_logon returned "
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"ACCESS_DENIED. Maybe the trust account "
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"password was changed and we didn't know it. "
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"Killing connections to domain %s\n",
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name_domain));
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invalidate_cm_connection(&domain->conn);
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retry = true;
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}
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} while ( (attempts < 2) && retry );
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result = winbind_samlogon_retry_loop(domain,
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state->mem_ctx,
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0,
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domain->dcname,
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name_user,
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name_domain,
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global_myname(),
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chal,
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lm_resp,
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nt_resp,
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&my_info3);
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if (!NT_STATUS_IS_OK(result)) {
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goto done;
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}
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/* handle the case where a NT4 DC does not fill in the acct_flags in
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* the samlogon reply info3. When accurate info3 is required by the
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@ -1621,12 +1654,9 @@ enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
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{
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NTSTATUS result;
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struct netr_SamInfo3 *info3 = NULL;
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struct rpc_pipe_client *netlogon_pipe;
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const char *name_user = NULL;
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const char *name_domain = NULL;
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const char *workstation;
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int attempts = 0;
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bool retry;
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DATA_BLOB lm_resp, nt_resp;
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@ -1680,72 +1710,21 @@ enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
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goto process_result;
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}
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do {
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netlogon_fn_t logon_fn;
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retry = false;
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netlogon_pipe = NULL;
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result = cm_connect_netlogon(domain, &netlogon_pipe);
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if (!NT_STATUS_IS_OK(result)) {
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DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
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nt_errstr(result)));
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goto done;
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}
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logon_fn = domain->can_do_samlogon_ex
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? rpccli_netlogon_sam_network_logon_ex
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: rpccli_netlogon_sam_network_logon;
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result = logon_fn(netlogon_pipe,
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state->mem_ctx,
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state->request->data.auth_crap.logon_parameters,
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domain->dcname,
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name_user,
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name_domain,
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/* Bug #3248 - found by Stefan Burkei. */
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workstation, /* We carefully set this above so use it... */
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state->request->data.auth_crap.chal,
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lm_resp,
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nt_resp,
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&info3);
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if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
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&& domain->can_do_samlogon_ex) {
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DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
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"retrying with NetSamLogon\n"));
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domain->can_do_samlogon_ex = false;
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retry = true;
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continue;
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}
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attempts += 1;
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/* We have to try a second time as cm_connect_netlogon
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might not yet have noticed that the DC has killed
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our connection. */
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if (!rpccli_is_connected(netlogon_pipe)) {
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retry = true;
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continue;
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}
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/* if we get access denied, a possible cause was that we had and open
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connection to the DC, but someone changed our machine account password
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out from underneath us using 'net rpc changetrustpw' */
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if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
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DEBUG(3,("winbindd_pam_auth: sam_logon returned "
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"ACCESS_DENIED. Maybe the trust account "
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"password was changed and we didn't know it. "
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"Killing connections to domain %s\n",
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name_domain));
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invalidate_cm_connection(&domain->conn);
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retry = true;
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}
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} while ( (attempts < 2) && retry );
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result = winbind_samlogon_retry_loop(domain,
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state->mem_ctx,
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state->request->data.auth_crap.logon_parameters,
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domain->dcname,
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name_user,
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name_domain,
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/* Bug #3248 - found by Stefan Burkei. */
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workstation, /* We carefully set this above so use it... */
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state->request->data.auth_crap.chal,
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lm_resp,
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nt_resp,
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&info3);
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if (!NT_STATUS_IS_OK(result)) {
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goto done;
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}
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process_result:
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