summaryrefslogtreecommitdiff
path: root/source4/librpc
diff options
context:
space:
mode:
Diffstat (limited to 'source4/librpc')
-rw-r--r--source4/librpc/config.mk2
-rw-r--r--source4/librpc/rpc/dcerpc_auth.c32
-rw-r--r--source4/librpc/rpc/dcerpc_schannel.c413
-rw-r--r--source4/librpc/rpc/dcerpc_util.c12
4 files changed, 31 insertions, 428 deletions
diff --git a/source4/librpc/config.mk b/source4/librpc/config.mk
index 70fafdaf3b..f6b05a41b5 100644
--- a/source4/librpc/config.mk
+++ b/source4/librpc/config.mk
@@ -20,9 +20,9 @@ INIT_OBJ_FILES = \
librpc/rpc/dcerpc.o
ADD_OBJ_FILES = \
librpc/rpc/dcerpc_auth.o \
+ librpc/rpc/dcerpc_schannel.o \
librpc/rpc/dcerpc_util.o \
librpc/rpc/dcerpc_error.o \
- librpc/rpc/dcerpc_schannel.o \
librpc/rpc/dcerpc_smb.o \
librpc/rpc/dcerpc_sock.o
REQUIRED_SUBSYSTEMS = SOCKET
diff --git a/source4/librpc/rpc/dcerpc_auth.c b/source4/librpc/rpc/dcerpc_auth.c
index c5bfe150bd..ae0a89910e 100644
--- a/source4/librpc/rpc/dcerpc_auth.c
+++ b/source4/librpc/rpc/dcerpc_auth.c
@@ -4,7 +4,7 @@
Generic Authentication Interface
Copyright (C) Andrew Tridgell 2003
- Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
Copyright (C) Stefan Metzmacher 2004
This program is free software; you can redistribute it and/or modify
@@ -159,34 +159,10 @@ NTSTATUS dcerpc_bind_auth_password(struct dcerpc_pipe *p,
return status;
}
- status = gensec_set_workstation(p->conn->security_state.generic_state,
- cli_credentials_get_workstation(credentials));
+ status = gensec_set_credentials(p->conn->security_state.generic_state,
+ credentials);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start set GENSEC client workstation name to %s: %s\n",
- cli_credentials_get_workstation(credentials), nt_errstr(status)));
- return status;
- }
-
- status = gensec_set_domain(p->conn->security_state.generic_state,
- cli_credentials_get_domain(credentials));
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start set GENSEC client domain to %s: %s\n",
- cli_credentials_get_domain(credentials), nt_errstr(status)));
- return status;
- }
-
- status = gensec_set_username(p->conn->security_state.generic_state,
- cli_credentials_get_username(credentials));
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start set GENSEC client username to %s: %s\n",
- cli_credentials_get_username(credentials), nt_errstr(status)));
- return status;
- }
-
- status = gensec_set_password(p->conn->security_state.generic_state,
- cli_credentials_get_password(credentials));
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start set GENSEC client password: %s\n",
+ DEBUG(1, ("Failed to start set GENSEC client credentails: %s\n",
nt_errstr(status)));
return status;
}
diff --git a/source4/librpc/rpc/dcerpc_schannel.c b/source4/librpc/rpc/dcerpc_schannel.c
index 77453cf476..3ae2624ff9 100644
--- a/source4/librpc/rpc/dcerpc_schannel.c
+++ b/source4/librpc/rpc/dcerpc_schannel.c
@@ -4,7 +4,8 @@
dcerpc schannel operations
Copyright (C) Andrew Tridgell 2004
-
+ 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 2 of the License, or
@@ -24,281 +25,13 @@
#include "librpc/gen_ndr/ndr_schannel.h"
#include "auth/auth.h"
-enum schannel_position {
- DCERPC_SCHANNEL_STATE_START = 0,
- DCERPC_SCHANNEL_STATE_UPDATE_1
-};
-
-struct dcerpc_schannel_state {
- enum schannel_position state;
- struct schannel_state *schannel_state;
- struct creds_CredentialState *creds;
-};
-
-/*
- wrappers for the schannel_*() functions
-
- These will become static again, when we get dynamic registration, and
- decrpc_schannel_security_ops come back here.
-*/
-static NTSTATUS dcerpc_schannel_unseal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct dcerpc_schannel_state *dce_schan_state = gensec_security->private_data;
-
- return schannel_unseal_packet(dce_schan_state->schannel_state, mem_ctx, data, length, sig);
-}
-
-static NTSTATUS dcerpc_schannel_check_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- const DATA_BLOB *sig)
-{
- struct dcerpc_schannel_state *dce_schan_state = gensec_security->private_data;
-
- return schannel_check_packet(dce_schan_state->schannel_state, data, length, sig);
-}
-
-static NTSTATUS dcerpc_schannel_seal_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct dcerpc_schannel_state *dce_schan_state = gensec_security->private_data;
-
- return schannel_seal_packet(dce_schan_state->schannel_state, mem_ctx, data, length, sig);
-}
-
-static NTSTATUS dcerpc_schannel_sign_packet(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- const uint8_t *data, size_t length,
- const uint8_t *whole_pdu, size_t pdu_length,
- DATA_BLOB *sig)
-{
- struct dcerpc_schannel_state *dce_schan_state = gensec_security->private_data;
-
- return schannel_sign_packet(dce_schan_state->schannel_state, mem_ctx, data, length, sig);
-}
-
-static size_t dcerpc_schannel_sig_size(struct gensec_security *gensec_security)
-{
- return 32;
-}
-
-static NTSTATUS dcerpc_schannel_session_key(struct gensec_security *gensec_security,
- DATA_BLOB *session_key)
-{
- return NT_STATUS_NOT_IMPLEMENTED;
-}
-
-static NTSTATUS dcerpc_schannel_update(struct gensec_security *gensec_security, TALLOC_CTX *out_mem_ctx,
- const DATA_BLOB in, DATA_BLOB *out)
-{
- struct dcerpc_schannel_state *dce_schan_state = gensec_security->private_data;
- NTSTATUS status;
- struct schannel_bind bind_schannel;
- struct schannel_bind_ack bind_schannel_ack;
- const char *workstation;
- const char *domain;
- *out = data_blob(NULL, 0);
-
- switch (gensec_security->gensec_role) {
- case GENSEC_CLIENT:
- if (dce_schan_state->state != DCERPC_SCHANNEL_STATE_START) {
- /* we could parse the bind ack, but we don't know what it is yet */
- return NT_STATUS_OK;
- }
-
- status = schannel_start(dce_schan_state,
- &dce_schan_state->schannel_state,
- dce_schan_state->creds->session_key,
- True);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start schannel client\n"));
- return status;
- }
- talloc_steal(dce_schan_state, dce_schan_state->schannel_state);
-
- bind_schannel.unknown1 = 0;
-#if 0
- /* to support this we'd need to have access to the full domain name */
- bind_schannel.bind_type = 23;
- bind_schannel.u.info23.domain = gensec_security->user.domain;
- bind_schannel.u.info23.account_name = gensec_security->user.name;
- bind_schannel.u.info23.dnsdomain = str_format_nbt_domain(out_mem_ctx, fulldomainname);
- bind_schannel.u.info23.workstation = str_format_nbt_domain(out_mem_ctx, gensec_get_workstation(gensec_security));
-#else
- bind_schannel.bind_type = 3;
- bind_schannel.u.info3.domain = gensec_security->user.domain;
- bind_schannel.u.info3.workstation = gensec_get_workstation(gensec_security);
-#endif
-
- status = ndr_push_struct_blob(out, out_mem_ctx, &bind_schannel,
- (ndr_push_flags_fn_t)ndr_push_schannel_bind);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(3, ("Could not create schannel bind: %s\n",
- nt_errstr(status)));
- return status;
- }
-
- dce_schan_state->state = DCERPC_SCHANNEL_STATE_UPDATE_1;
-
- return NT_STATUS_MORE_PROCESSING_REQUIRED;
- case GENSEC_SERVER:
-
- if (dce_schan_state->state != DCERPC_SCHANNEL_STATE_START) {
- /* no third leg on this protocol */
- return NT_STATUS_INVALID_PARAMETER;
- }
-
- /* parse the schannel startup blob */
- status = ndr_pull_struct_blob(&in, out_mem_ctx, &bind_schannel,
- (ndr_pull_flags_fn_t)ndr_pull_schannel_bind);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- if (bind_schannel.bind_type == 23) {
- workstation = bind_schannel.u.info23.workstation;
- domain = bind_schannel.u.info23.domain;
- } else {
- workstation = bind_schannel.u.info3.workstation;
- domain = bind_schannel.u.info3.domain;
- }
-
- /* pull the session key for this client */
- status = schannel_fetch_session_key(out_mem_ctx, workstation,
- domain, &dce_schan_state->creds);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(3, ("Could not find session key for attempted schannel connection from %s: %s\n",
- workstation, nt_errstr(status)));
- return status;
- }
-
- /* start up the schannel server code */
- status = schannel_start(dce_schan_state,
- &dce_schan_state->schannel_state,
- dce_schan_state->creds->session_key, False);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(3, ("Could not initialise schannel state from client %s: %s\n",
- workstation, nt_errstr(status)));
- return status;
- }
- talloc_steal(dce_schan_state, dce_schan_state->schannel_state);
-
- bind_schannel_ack.unknown1 = 1;
- bind_schannel_ack.unknown2 = 0;
- bind_schannel_ack.unknown3 = 0x6c0000;
-
- status = ndr_push_struct_blob(out, out_mem_ctx, &bind_schannel_ack,
- (ndr_push_flags_fn_t)ndr_push_schannel_bind_ack);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(3, ("Could not return schannel bind ack for client %s: %s\n",
- workstation, nt_errstr(status)));
- return status;
- }
-
- dce_schan_state->state = DCERPC_SCHANNEL_STATE_UPDATE_1;
-
- return NT_STATUS_OK;
- }
- return NT_STATUS_INVALID_PARAMETER;
-}
-
-/**
- * Return the credentials of a logged on user, including session keys
- * etc.
- *
- * Only valid after a successful authentication
- *
- * May only be called once per authentication.
- *
- */
-
-NTSTATUS dcerpc_schannel_session_info(struct gensec_security *gensec_security,
- struct auth_session_info **session_info)
-{
- (*session_info) = talloc(gensec_security, struct auth_session_info);
- NT_STATUS_HAVE_NO_MEMORY(*session_info);
-
- ZERO_STRUCTP(*session_info);
-
- return NT_STATUS_OK;
-}
-
-/**
- * Return the struct creds_CredentialState.
- *
- * Make sure not to call this unless gensec is using schannel...
- */
-
-NTSTATUS dcerpc_schannel_creds(struct gensec_security *gensec_security,
- TALLOC_CTX *mem_ctx,
- struct creds_CredentialState **creds)
-{
- struct dcerpc_schannel_state *dce_schan_state = gensec_security->private_data;
-
- *creds = talloc_reference(mem_ctx, dce_schan_state->creds);
- if (!*creds) {
- return NT_STATUS_NO_MEMORY;
- }
- return NT_STATUS_OK;
-}
-
-
-static NTSTATUS dcerpc_schannel_start(struct gensec_security *gensec_security)
-{
- struct dcerpc_schannel_state *dce_schan_state;
-
- dce_schan_state = talloc(gensec_security, struct dcerpc_schannel_state);
- if (!dce_schan_state) {
- return NT_STATUS_NO_MEMORY;
- }
-
- dce_schan_state->state = DCERPC_SCHANNEL_STATE_START;
- gensec_security->private_data = dce_schan_state;
-
- return NT_STATUS_OK;
-}
-
-static NTSTATUS dcerpc_schannel_server_start(struct gensec_security *gensec_security)
-{
- NTSTATUS status;
-
- status = dcerpc_schannel_start(gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- return NT_STATUS_OK;
-}
-
-static NTSTATUS dcerpc_schannel_client_start(struct gensec_security *gensec_security)
-{
- NTSTATUS status;
-
- status = dcerpc_schannel_start(gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- return NT_STATUS_OK;
-}
-
-
/*
get a schannel key using a netlogon challenge on a secondary pipe
*/
static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
struct dcerpc_pipe *p,
struct cli_credentials *credentials,
- int chan_type,
- struct creds_CredentialState *creds)
+ int chan_type)
{
NTSTATUS status;
struct dcerpc_binding *b;
@@ -307,8 +40,12 @@ static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
struct netr_ServerAuthenticate2 a;
struct netr_Credential credentials1, credentials2, credentials3;
struct samr_Password mach_pwd;
- const char *workgroup;
uint32_t negotiate_flags;
+ struct creds_CredentialState *creds;
+ creds = talloc(tmp_ctx, struct creds_CredentialState);
+ if (!creds) {
+ return NT_STATUS_NO_MEMORY;
+ }
if (p->conn->flags & DCERPC_SCHANNEL_128) {
negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
@@ -316,8 +53,6 @@ static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
negotiate_flags = NETLOGON_NEG_AUTH2_FLAGS;
}
- workgroup = cli_credentials_get_domain(credentials);
-
/*
step 1 - establish a netlogon connection, with no authentication
*/
@@ -369,9 +104,6 @@ static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
*/
E_md4hash(cli_credentials_get_password(credentials), mach_pwd.hash);
creds_client_init(creds, &credentials1, &credentials2,
- cli_credentials_get_workstation(credentials),
- cli_credentials_get_domain(credentials),
- cli_credentials_get_username(credentials),
&mach_pwd, &credentials3,
negotiate_flags);
@@ -393,6 +125,8 @@ static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
return NT_STATUS_UNSUCCESSFUL;
}
+ cli_credentials_set_netlogon_creds(credentials, creds);
+
/*
the schannel session key is now in creds.session_key
@@ -403,76 +137,6 @@ static NTSTATUS dcerpc_schannel_key(TALLOC_CTX *tmp_ctx,
return NT_STATUS_OK;
}
-/*
- do a schannel style bind on a dcerpc pipe. The username is usually
- of the form HOSTNAME$ and the password is the domain trust password
-*/
-NTSTATUS dcerpc_bind_auth_schannel_withkey(struct dcerpc_pipe *p,
- const char *uuid, uint_t version,
- struct creds_CredentialState *creds)
-{
- NTSTATUS status;
- struct dcerpc_schannel_state *dce_schan_state;
-
- status = gensec_client_start(p, &p->conn->security_state.generic_state);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- status = gensec_set_workstation(p->conn->security_state.generic_state, creds->computer_name);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to set schannel workstation to %s: %s\n",
- creds->computer_name, nt_errstr(status)));
- talloc_free(p->conn->security_state.generic_state);
- p->conn->security_state.generic_state = NULL;
- return status;
- }
-
- status = gensec_set_username(p->conn->security_state.generic_state, creds->account_name);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to set schannel username to %s: %s\n",
- creds->account_name, nt_errstr(status)));
- talloc_free(p->conn->security_state.generic_state);
- p->conn->security_state.generic_state = NULL;
- return status;
- }
-
- status = gensec_set_domain(p->conn->security_state.generic_state, creds->domain);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to set schannel domain to %s: %s\n",
- creds->domain, nt_errstr(status)));
- talloc_free(p->conn->security_state.generic_state);
- p->conn->security_state.generic_state = NULL;
- return status;
- }
-
- status = gensec_start_mech_by_authtype(p->conn->security_state.generic_state,
- DCERPC_AUTH_TYPE_SCHANNEL,
- dcerpc_auth_level(p->conn));
-
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start SCHANNEL GENSEC backend: %s\n", nt_errstr(status)));
- talloc_free(p->conn->security_state.generic_state);
- p->conn->security_state.generic_state = NULL;
- return status;
- }
-
- dce_schan_state = p->conn->security_state.generic_state->private_data;
- dce_schan_state->creds = talloc_reference(dce_schan_state, creds);
-
- status = dcerpc_bind_auth(p, DCERPC_AUTH_TYPE_SCHANNEL, dcerpc_auth_level(p->conn),
- uuid, version);
-
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to bind to pipe with SCHANNEL: %s\n", nt_errstr(status)));
- talloc_free(p->conn->security_state.generic_state);
- p->conn->security_state.generic_state = NULL;
- return status;
- }
-
- return NT_STATUS_OK;
-}
-
NTSTATUS dcerpc_bind_auth_schannel(TALLOC_CTX *tmp_ctx,
struct dcerpc_pipe *p,
const char *uuid, uint_t version,
@@ -480,11 +144,6 @@ NTSTATUS dcerpc_bind_auth_schannel(TALLOC_CTX *tmp_ctx,
{
NTSTATUS status;
int chan_type = 0;
- struct creds_CredentialState *creds;
- creds = talloc(tmp_ctx, struct creds_CredentialState);
- if (!creds) {
- return NT_STATUS_NO_MEMORY;
- }
if (p->conn->flags & DCERPC_SCHANNEL_BDC) {
chan_type = SEC_CHAN_BDC;
@@ -494,58 +153,20 @@ NTSTATUS dcerpc_bind_auth_schannel(TALLOC_CTX *tmp_ctx,
chan_type = SEC_CHAN_DOMAIN;
}
+ /* Fills in NETLOGON credentials */
status = dcerpc_schannel_key(tmp_ctx,
p, credentials,
- chan_type,
- creds);
+ chan_type);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to fetch schannel session key: %s\n",
+ DEBUG(1, ("Failed to setup credentials for account %s: %s\n",
+ cli_credentials_get_username(credentials),
nt_errstr(status)));
return status;
}
- return dcerpc_bind_auth_schannel_withkey(p, uuid, version, creds);
+ return dcerpc_bind_auth_password(p, uuid, version,
+ credentials, DCERPC_AUTH_TYPE_SCHANNEL,
+ NULL);
}
-static BOOL dcerpc_schannel_have_feature(struct gensec_security *gensec_security,
- uint32_t feature)
-{
- if (feature & (GENSEC_FEATURE_SESSION_KEY |
- GENSEC_FEATURE_SIGN |
- GENSEC_FEATURE_SEAL)) {
- return True;
- }
- return False;
-}
-
-
-static const struct gensec_security_ops gensec_dcerpc_schannel_security_ops = {
- .name = "dcerpc_schannel",
- .auth_type = DCERPC_AUTH_TYPE_SCHANNEL,
- .client_start = dcerpc_schannel_client_start,
- .server_start = dcerpc_schannel_server_start,
- .update = dcerpc_schannel_update,
- .seal_packet = dcerpc_schannel_seal_packet,
- .sign_packet = dcerpc_schannel_sign_packet,
- .check_packet = dcerpc_schannel_check_packet,
- .unseal_packet = dcerpc_schannel_unseal_packet,
- .session_key = dcerpc_schannel_session_key,
- .session_info = dcerpc_schannel_session_info,
- .sig_size = dcerpc_schannel_sig_size,
- .have_feature = dcerpc_schannel_have_feature,
- .enabled = True
-};
-
-NTSTATUS gensec_dcerpc_schannel_init(void)
-{
- NTSTATUS ret;
- ret = gensec_register(&gensec_dcerpc_schannel_security_ops);
- if (!NT_STATUS_IS_OK(ret)) {
- DEBUG(0,("Failed to register '%s' gensec backend!\n",
- gensec_dcerpc_schannel_security_ops.name));
- return ret;
- }
-
- return ret;
-}
diff --git a/source4/librpc/rpc/dcerpc_util.c b/source4/librpc/rpc/dcerpc_util.c
index 88b1c54cef..ffefd5111c 100644
--- a/source4/librpc/rpc/dcerpc_util.c
+++ b/source4/librpc/rpc/dcerpc_util.c
@@ -5,6 +5,7 @@
Copyright (C) Andrew Tridgell 2003
Copyright (C) Jelmer Vernooij 2004
+ Copyright (C) Andrew Bartlett <abartlet@samba.org> 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
@@ -926,7 +927,12 @@ NTSTATUS dcerpc_pipe_auth(struct dcerpc_pipe *p,
p->conn->binding_string = dcerpc_binding_string(p, binding);
if (!cli_credentials_is_anonymous(credentials) &&
- (binding->flags & DCERPC_SCHANNEL_ANY)) {
+ (binding->flags & DCERPC_SCHANNEL_ANY) &&
+ !cli_credentials_get_netlogon_creds(credentials)) {
+
+ /* If we don't already have netlogon credentials for
+ * the schannel bind, then we have to get these
+ * first */
status = dcerpc_bind_auth_schannel(tmp_ctx,
p, pipe_uuid, pipe_version,
credentials);
@@ -936,6 +942,8 @@ NTSTATUS dcerpc_pipe_auth(struct dcerpc_pipe *p,
auth_type = DCERPC_AUTH_TYPE_SPNEGO;
} else if (binding->flags & DCERPC_AUTH_KRB5) {
auth_type = DCERPC_AUTH_TYPE_KRB5;
+ } else if (binding->flags & DCERPC_SCHANNEL_ANY) {
+ auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
} else {
auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
}
@@ -974,13 +982,11 @@ static NTSTATUS dcerpc_pipe_connect_ncacn_np(TALLOC_CTX *tmp_ctx,
cli_credentials_set_anonymous(anon_creds);
cli_credentials_guess(anon_creds);
status = smbcli_full_connection(p->conn, &cli,
- cli_credentials_get_workstation(credentials),
binding->host,
"IPC$", NULL,
anon_creds);
} else {
status = smbcli_full_connection(p->conn, &cli,
- cli_credentials_get_workstation(credentials),
binding->host,
"IPC$", NULL,
credentials);
generated by cgit (git 2.34.1) at 2024-07-03 18:17:56 +0000