r11786: move all SMB protocol specific stuff to smb_server/smb/

metze
(This used to be commit 5fea278cb65076cea71bb6c921e51c4feffc37d7)

1 files changed, 370 insertions, 0 deletions

diff --git a/source4/smb_server/smb/sesssetup.c b/source4/smb_server/smb/sesssetup.c
new file mode 100644
index 0000000000..3f09346243
--- /dev/null
+++ b/source4/smb_server/smb/sesssetup.c
@@ -0,0 +1,370 @@
+/* 
+   Unix SMB/CIFS implementation.
+   handle SMBsessionsetup
+   Copyright (C) Andrew Tridgell                      1998-2001
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
+   Copyright (C) Jim McDonough                        2002
+   Copyright (C) Luke Howard                          2003
+   Copyright (C) Stefan Metzmacher                    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 2 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "version.h"
+#include "auth/auth.h"
+#include "smb_server/smb_server.h"
+#include "smbd/service_stream.h"
+#include "libcli/nbt/libnbt.h"
+
+/*
+  setup the OS, Lanman and domain portions of a session setup reply
+*/
+static void sesssetup_common_strings(struct smbsrv_request *req,
+				     char **os, char **lanman, char **domain)
+{
+	(*os) = talloc_asprintf(req, "Unix");
+	(*lanman) = talloc_asprintf(req, "Samba %s", SAMBA_VERSION_STRING);
+	(*domain) = talloc_asprintf(req, "%s", lp_workgroup());
+}
+
+
+/*
+  handler for old style session setup
+*/
+static NTSTATUS sesssetup_old(struct smbsrv_request *req, union smb_sesssetup *sess)
+{
+	NTSTATUS status;
+	struct auth_usersupplied_info *user_info = NULL;
+	struct auth_serversupplied_info *server_info = NULL;
+	struct auth_session_info *session_info;
+	struct smbsrv_session *smb_sess;
+	const char *remote_machine = NULL;
+
+	sess->old.out.vuid = 0;
+	sess->old.out.action = 0;
+
+	if (!req->smb_conn->negotiate.done_sesssetup) {
+		req->smb_conn->negotiate.max_send = sess->old.in.bufsize;
+	}
+	
+	if (req->smb_conn->negotiate.calling_name) {
+		remote_machine = req->smb_conn->negotiate.calling_name->name;
+	}
+	
+	if (!remote_machine) {
+		remote_machine = socket_get_peer_addr(req->smb_conn->connection->socket, req);
+	}
+
+	user_info = talloc(req, struct auth_usersupplied_info);
+	NT_STATUS_HAVE_NO_MEMORY(user_info);
+	
+	user_info->mapped_state = False;
+	user_info->logon_parameters = 0;
+	user_info->flags = 0;
+	user_info->client.account_name = sess->old.in.user;
+	user_info->client.domain_name = sess->old.in.domain;
+	user_info->workstation_name = remote_machine;
+	user_info->remote_host = socket_get_peer_addr(req->smb_conn->connection->socket, user_info);
+	
+	user_info->password_state = AUTH_PASSWORD_RESPONSE;
+	user_info->password.response.lanman = sess->old.in.password;
+	user_info->password.response.lanman.data = talloc_steal(user_info, sess->old.in.password.data);
+	user_info->password.response.nt = data_blob(NULL, 0);
+
+	status = auth_check_password(req->smb_conn->negotiate.auth_context,
+				     req, user_info, &server_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		return auth_nt_status_squash(status);
+	}
+
+	/* This references server_info into session_info */
+	status = auth_generate_session_info(req, server_info, &session_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		return auth_nt_status_squash(status);
+	}
+
+	/* allocate a new session */
+	smb_sess = smbsrv_session_new(req->smb_conn, NULL);
+	if (!smb_sess) {
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* Ensure this is marked as a 'real' vuid, not one
+	 * simply valid for the session setup leg */
+	status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		return auth_nt_status_squash(status);
+	}
+
+	/* To correctly process any AndX packet (like a tree connect)
+	 * we need to fill in the session on the request here */
+	req->session = smb_sess;
+	sess->old.out.vuid = smb_sess->vuid;
+
+	sesssetup_common_strings(req, 
+				 &sess->old.out.os,
+				 &sess->old.out.lanman,
+				 &sess->old.out.domain);
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  handler for NT1 style session setup
+*/
+static NTSTATUS sesssetup_nt1(struct smbsrv_request *req, union smb_sesssetup *sess)
+{
+	NTSTATUS status;
+	struct auth_context *auth_context;
+	struct auth_usersupplied_info *user_info = NULL;
+	struct auth_serversupplied_info *server_info = NULL;
+	struct auth_session_info *session_info;
+	struct smbsrv_session *smb_sess;
+	const char *remote_machine = NULL;
+	
+	sess->nt1.out.vuid = 0;
+	sess->nt1.out.action = 0;
+
+	if (!req->smb_conn->negotiate.done_sesssetup) {
+		req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize;
+		req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities;
+	}
+
+	if (req->smb_conn->negotiate.spnego_negotiated) {
+		if (sess->nt1.in.user && *sess->nt1.in.user) {
+			/* We can't accept a normal login, because we
+			 * don't have a challenge */
+			return NT_STATUS_LOGON_FAILURE;
+		}
+
+		/* TODO: should we use just "anonymous" here? */
+		status = auth_context_create(req, lp_auth_methods(), 
+					     &auth_context, 
+					     req->smb_conn->connection->event.ctx);
+		NT_STATUS_NOT_OK_RETURN(status);
+	} else {
+		auth_context = req->smb_conn->negotiate.auth_context;
+	}
+
+	if (req->smb_conn->negotiate.calling_name) {
+		remote_machine = req->smb_conn->negotiate.calling_name->name;
+	}
+
+	if (!remote_machine) {
+		remote_machine = socket_get_peer_addr(req->smb_conn->connection->socket, req);
+	}
+	
+	user_info = talloc(req, struct auth_usersupplied_info);
+	NT_STATUS_HAVE_NO_MEMORY(user_info);
+	
+	user_info->mapped_state = False;
+	user_info->logon_parameters = 0;
+	user_info->flags = 0;
+	user_info->client.account_name = sess->nt1.in.user;
+	user_info->client.domain_name = sess->nt1.in.domain;
+	user_info->workstation_name = remote_machine;
+	user_info->remote_host = socket_get_peer_addr(req->smb_conn->connection->socket, user_info);
+	
+	user_info->password_state = AUTH_PASSWORD_RESPONSE;
+	user_info->password.response.lanman = sess->nt1.in.password1;
+	user_info->password.response.lanman.data = talloc_steal(user_info, sess->nt1.in.password1.data);
+	user_info->password.response.nt = sess->nt1.in.password2;
+	user_info->password.response.nt.data = talloc_steal(user_info, sess->nt1.in.password2.data);
+
+	status = auth_check_password(auth_context, req, user_info, &server_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		return auth_nt_status_squash(status);
+	}
+
+	/* This references server_info into session_info */
+	status = auth_generate_session_info(req, server_info, &session_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		return auth_nt_status_squash(status);
+	}
+
+	/* allocate a new session */
+	smb_sess = smbsrv_session_new(req->smb_conn, NULL);
+	if (!smb_sess) {
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	/* Ensure this is marked as a 'real' vuid, not one
+	 * simply valid for the session setup leg */
+	status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
+	if (!NT_STATUS_IS_OK(status)) {
+		return auth_nt_status_squash(status);
+	}
+
+	/* To correctly process any AndX packet (like a tree connect)
+	 * we need to fill in the session on the request here */
+	req->session = smb_sess;
+	sess->nt1.out.vuid = smb_sess->vuid;
+
+	sesssetup_common_strings(req, 
+				 &sess->nt1.out.os,
+				 &sess->nt1.out.lanman,
+				 &sess->nt1.out.domain);
+
+	if (!session_info->server_info->authenticated) {
+		return NT_STATUS_OK;
+	}
+
+ 	if (!srv_setup_signing(req->smb_conn, &session_info->session_key, &sess->nt1.in.password2)) {
+		/* Already signing, or disabled */
+		return NT_STATUS_OK;
+	}
+
+	/* Force check of the request packet, now we know the session key */
+	req_signing_check_incoming(req);
+/* TODO: why don't we check the result here? */
+
+	/* Unfortunetly win2k3 as a client doesn't sign the request
+	 * packet here, so we have to force signing to start again */
+
+	srv_signing_restart(req->smb_conn,  &session_info->session_key, &sess->nt1.in.password2);
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  handler for SPNEGO style session setup
+*/
+static NTSTATUS sesssetup_spnego(struct smbsrv_request *req, union smb_sesssetup *sess)
+{
+	NTSTATUS status = NT_STATUS_ACCESS_DENIED;
+	struct smbsrv_session *smb_sess;
+	struct gensec_security *gensec_ctx;
+	struct auth_session_info *session_info = NULL;
+	uint16_t vuid;
+
+	sess->spnego.out.vuid = 0;
+	sess->spnego.out.action = 0;
+
+	sesssetup_common_strings(req, 
+				 &sess->spnego.out.os,
+				 &sess->spnego.out.lanman,
+				 &sess->spnego.out.workgroup);
+
+	if (!req->smb_conn->negotiate.done_sesssetup) {
+		req->smb_conn->negotiate.max_send = sess->nt1.in.bufsize;
+		req->smb_conn->negotiate.client_caps = sess->nt1.in.capabilities;
+	}
+
+	vuid = SVAL(req->in.hdr,HDR_UID);
+	smb_sess = smbsrv_session_find_sesssetup(req->smb_conn, vuid);
+	if (smb_sess) {
+		gensec_ctx = smb_sess->gensec_ctx;
+	} else {
+		status = gensec_server_start(req, &gensec_ctx,
+					     req->smb_conn->connection->event.ctx);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
+			return status;
+		}
+
+		gensec_set_credentials(gensec_ctx, req->smb_conn->negotiate.server_credentials);
+
+		gensec_set_target_service(gensec_ctx, "cifs");
+
+		gensec_want_feature(gensec_ctx, GENSEC_FEATURE_SESSION_KEY);
+
+		status = gensec_start_mech_by_oid(gensec_ctx, GENSEC_OID_SPNEGO);
+		if (!NT_STATUS_IS_OK(status)) {
+			DEBUG(1, ("Failed to start GENSEC SPNEGO server code: %s\n", nt_errstr(status)));
+			return status;
+		}
+
+		smb_sess = smbsrv_session_new(req->smb_conn, gensec_ctx);
+		if (!smb_sess) {
+			return NT_STATUS_ACCESS_DENIED;
+		}
+	}
+
+	status = gensec_update(gensec_ctx, req, sess->spnego.in.secblob, &sess->spnego.out.secblob);
+	if (NT_STATUS_IS_OK(status)) {
+		DATA_BLOB session_key;
+		
+		status = gensec_session_info(gensec_ctx, &session_info);
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(smb_sess);
+			return status;
+		}
+		
+		status = gensec_session_key(gensec_ctx, 
+					    &session_key);
+/* TODO: what if getting the session key failed? */
+		if (NT_STATUS_IS_OK(status) 
+		    && session_info->server_info->authenticated
+		    && srv_setup_signing(req->smb_conn, &session_key, NULL)) {
+			/* Force check of the request packet, now we know the session key */
+			req_signing_check_incoming(req);
+
+			srv_signing_restart(req->smb_conn, &session_key, NULL);
+		}
+
+	} else if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+	} else {
+		status = auth_nt_status_squash(status);
+		
+		/* This invalidates the VUID of the failed login */
+		talloc_free(smb_sess);
+		return status;
+	}
+		
+	if (NT_STATUS_IS_OK(status)) {
+		/* Ensure this is marked as a 'real' vuid, not one
+		 * simply valid for the session setup leg */
+		status = smbsrv_session_sesssetup_finished(smb_sess, session_info);
+		if (!NT_STATUS_IS_OK(status)) {
+			return auth_nt_status_squash(status);
+		}
+		req->session = smb_sess;
+	}
+	sess->spnego.out.vuid = smb_sess->vuid;
+
+	return status;
+}
+
+/*
+  backend for sessionsetup call - this takes all 3 variants of the call
+*/
+NTSTATUS sesssetup_backend(struct smbsrv_request *req, 
+			   union smb_sesssetup *sess)
+{
+	NTSTATUS status = NT_STATUS_INVALID_LEVEL;
+
+	switch (sess->old.level) {
+		case RAW_SESSSETUP_OLD:
+			status = sesssetup_old(req, sess);
+			break;
+		case RAW_SESSSETUP_NT1:
+			status = sesssetup_nt1(req, sess);
+			break;
+		case RAW_SESSSETUP_SPNEGO:
+			status = sesssetup_spnego(req, sess);
+			break;
+	}
+
+	if (NT_STATUS_IS_OK(status)) {
+		req->smb_conn->negotiate.done_sesssetup = True;
+	}
+
+	return status;
+}
+
+