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authorJeremy Allison <jra@samba.org>2007-03-20 01:17:47 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:18:43 -0500
commit296dcbac5897ad208c890720d3356a3ddc5f7794 (patch)
tree3fe4d1926ba57b0517a1b09966ca31a21c30c1a1
parentb4f19aea18fd6406c56b00c1410ef842720ca4d2 (diff)
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r21882: The server part of the code has to use an AUTH_NTLMSSP struct,
not just an NTLMSSP - grr. This complicates the re-use of common client and server code but I think I've got it right. Not turned on of valgrinded yet, but you can see it start to take shape ! Jeremy. (This used to be commit 60fc9c0aedf42dcd9df2ef9f1df07eaf3bca9bce)
-rw-r--r--source3/Makefile.in2
-rw-r--r--source3/lib/dummysmbd.c15
-rw-r--r--source3/libsmb/smb_seal.c102
-rw-r--r--source3/smbd/seal.c257
-rw-r--r--source3/smbd/server.c2
-rw-r--r--source3/smbd/sesssetup.c2
-rw-r--r--source3/smbd/trans2.c27
7 files changed, 327 insertions, 80 deletions
diff --git a/source3/Makefile.in b/source3/Makefile.in
index 40351900c8..4d3fb106cd 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -472,7 +472,7 @@ SMBD_OBJ_SRV = smbd/files.o smbd/chgpasswd.o smbd/connection.o \
smbd/reply.o smbd/sesssetup.o smbd/trans2.o smbd/uid.o \
smbd/dosmode.o smbd/filename.o smbd/open.o smbd/close.o \
smbd/blocking.o smbd/sec_ctx.o smbd/srvstr.o \
- smbd/vfs.o smbd/statcache.o \
+ smbd/vfs.o smbd/statcache.o smbd/seal.o \
smbd/posix_acls.o lib/sysacls.o $(SERVER_MUTEX_OBJ) \
smbd/process.o smbd/service.o smbd/error.o \
printing/printfsp.o lib/sysquotas.o lib/sysquotas_linux.o \
diff --git a/source3/lib/dummysmbd.c b/source3/lib/dummysmbd.c
index a291a5884d..6017a12928 100644
--- a/source3/lib/dummysmbd.c
+++ b/source3/lib/dummysmbd.c
@@ -48,3 +48,18 @@ NTSTATUS can_delete_directory(struct connection_struct *conn,
return NT_STATUS_OK;
}
+NTSTATUS srv_decrypt_buffer(char *buf)
+{
+ return NT_STATUS_OK;
+}
+
+NTSTATUS srv_encrypt_buffer(char *buffer, char **buf_out)
+{
+ *buf_out = buffer;
+ return NT_STATUS_OK;
+}
+
+void srv_free_enc_buffer(char *buf)
+{
+ ;
+}
diff --git a/source3/libsmb/smb_seal.c b/source3/libsmb/smb_seal.c
index 2d1201ae7e..10b9d8fdcb 100644
--- a/source3/libsmb/smb_seal.c
+++ b/source3/libsmb/smb_seal.c
@@ -25,7 +25,7 @@
Is encryption turned on ?
******************************************************************************/
-static BOOL internal_encryption_on(struct smb_trans_enc_state *es)
+BOOL common_encryption_on(struct smb_trans_enc_state *es)
{
return ((es != NULL) && es->enc_on);
}
@@ -35,7 +35,7 @@ static BOOL internal_encryption_on(struct smb_trans_enc_state *es)
NTLM decrypt an incoming buffer.
******************************************************************************/
-static NTSTATUS internal_ntlm_decrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char *buf)
+NTSTATUS common_ntlm_decrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char *buf)
{
NTSTATUS status;
size_t orig_len = smb_len(buf);
@@ -70,7 +70,7 @@ static NTSTATUS internal_ntlm_decrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char
NTLM encrypt an outgoing buffer. Return the encrypted pointer in ppbuf_out.
******************************************************************************/
-static NTSTATUS internal_ntlm_encrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char *buf, char **ppbuf_out)
+NTSTATUS common_ntlm_encrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char *buf, char **ppbuf_out)
{
NTSTATUS status;
char *buf_out;
@@ -123,7 +123,7 @@ static NTSTATUS internal_ntlm_encrypt_buffer(NTLMSSP_STATE *ntlmssp_state, char
******************************************************************************/
#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
-static NTSTATUS internal_gss_decrypt_buffer(gss_ctx_id_t context_handle, char *buf)
+NTSTATUS common_gss_decrypt_buffer(gss_ctx_id_t context_handle, char *buf)
{
return NT_STATUS_NOT_SUPPORTED;
}
@@ -135,7 +135,7 @@ static NTSTATUS internal_gss_decrypt_buffer(gss_ctx_id_t context_handle, char *b
******************************************************************************/
#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
-static NTSTATUS srv_gss_encrypt_buffer(gss_ctx_id_t context_handle, char *buf, char **buf_out)
+NTSTATUS common_gss_encrypt_buffer(gss_ctx_id_t context_handle, char *buf, char **buf_out)
{
return NT_STATUS_NOT_SUPPORTED;
}
@@ -146,19 +146,19 @@ static NTSTATUS srv_gss_encrypt_buffer(gss_ctx_id_t context_handle, char *buf, c
Encrypt an outgoing buffer. Return the alloced encrypted pointer in buf_out.
******************************************************************************/
-static NTSTATUS internal_encrypt_buffer(struct smb_trans_enc_state *es, char *buffer, char **buf_out)
+NTSTATUS common_encrypt_buffer(struct smb_trans_enc_state *es, char *buffer, char **buf_out)
{
- if (!internal_encryption_on(es)) {
+ if (!common_encryption_on(es)) {
/* Not encrypting. */
*buf_out = buffer;
return NT_STATUS_OK;
}
if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
- return internal_ntlm_encrypt_buffer(es->ntlmssp_state, buffer, buf_out);
+ return common_ntlm_encrypt_buffer(es->ntlmssp_state, buffer, buf_out);
} else {
#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
- return internal_gss_encrypt_buffer(es->context_handle, buffer, buf_out);
+ return common_gss_encrypt_buffer(es->context_handle, buffer, buf_out);
#else
return NT_STATUS_NOT_SUPPORTED;
#endif
@@ -171,17 +171,17 @@ static NTSTATUS internal_encrypt_buffer(struct smb_trans_enc_state *es, char *bu
New data must be less than or equal to the current length.
******************************************************************************/
-static NTSTATUS internal_decrypt_buffer(struct smb_trans_enc_state *es, char *buf)
+NTSTATUS common_decrypt_buffer(struct smb_trans_enc_state *es, char *buf)
{
- if (!internal_encryption_on(es)) {
+ if (!common_encryption_on(es)) {
/* Not decrypting. */
return NT_STATUS_OK;
}
if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
- return internal_ntlm_decrypt_buffer(es->ntlmssp_state, buf);
+ return common_ntlm_decrypt_buffer(es->ntlmssp_state, buf);
} else {
#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
- return internal_gss_decrypt_buffer(es->context_handle, buf);
+ return common_gss_decrypt_buffer(es->context_handle, buf);
#else
return NT_STATUS_NOT_SUPPORTED;
#endif
@@ -192,7 +192,7 @@ static NTSTATUS internal_decrypt_buffer(struct smb_trans_enc_state *es, char *bu
Shutdown an encryption state.
******************************************************************************/
-static void internal_free_encryption_context(struct smb_trans_enc_state **pp_es)
+void common_free_encryption_state(struct smb_trans_enc_state **pp_es)
{
struct smb_trans_enc_state *es = *pp_es;
@@ -201,7 +201,9 @@ static void internal_free_encryption_context(struct smb_trans_enc_state **pp_es)
}
if (es->smb_enc_type == SMB_TRANS_ENC_NTLM) {
- ntlmssp_end(&es->ntlmssp_state);
+ if (es->ntlmssp_state) {
+ ntlmssp_end(&es->ntlmssp_state);
+ }
}
#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
if (es->smb_enc_type == SMB_TRANS_ENC_GSS) {
@@ -216,9 +218,9 @@ static void internal_free_encryption_context(struct smb_trans_enc_state **pp_es)
Free an encryption-allocated buffer.
******************************************************************************/
-static void internal_free_enc_buffer(struct smb_trans_enc_state *es, char *buf)
+void common_free_enc_buffer(struct smb_trans_enc_state *es, char *buf)
{
- if (!internal_encryption_on(es)) {
+ if (!common_encryption_on(es)) {
return;
}
@@ -242,7 +244,7 @@ static void internal_free_enc_buffer(struct smb_trans_enc_state *es, char *buf)
BOOL cli_encryption_on(struct cli_state *cli)
{
- return internal_encryption_on(cli->trans_enc_state);
+ return common_encryption_on(cli->trans_enc_state);
}
/******************************************************************************
@@ -251,7 +253,7 @@ BOOL cli_encryption_on(struct cli_state *cli)
void cli_free_encryption_context(struct cli_state *cli)
{
- return internal_free_encryption_context(&cli->trans_enc_state);
+ return common_free_encryption_state(&cli->trans_enc_state);
}
/******************************************************************************
@@ -260,7 +262,7 @@ void cli_free_encryption_context(struct cli_state *cli)
void cli_free_enc_buffer(struct cli_state *cli, char *buf)
{
- return internal_free_enc_buffer(cli->trans_enc_state, buf);
+ return common_free_enc_buffer(cli->trans_enc_state, buf);
}
/******************************************************************************
@@ -269,7 +271,7 @@ void cli_free_enc_buffer(struct cli_state *cli, char *buf)
NTSTATUS cli_decrypt_message(struct cli_state *cli)
{
- return internal_decrypt_buffer(cli->trans_enc_state, cli->inbuf);
+ return common_decrypt_buffer(cli->trans_enc_state, cli->inbuf);
}
/******************************************************************************
@@ -278,61 +280,5 @@ NTSTATUS cli_decrypt_message(struct cli_state *cli)
NTSTATUS cli_encrypt_message(struct cli_state *cli, char **buf_out)
{
- return internal_encrypt_buffer(cli->trans_enc_state, cli->outbuf, buf_out);
-}
-
-/******************************************************************************
- Server side encryption.
-******************************************************************************/
-
-/******************************************************************************
- Global server state.
-******************************************************************************/
-
-static struct smb_trans_enc_state *partial_srv_trans_enc_state;
-static struct smb_trans_enc_state *srv_trans_enc_state;
-
-/******************************************************************************
- Is server encryption on ?
-******************************************************************************/
-
-BOOL srv_encryption_on(void)
-{
- return internal_encryption_on(srv_trans_enc_state);
-}
-
-/******************************************************************************
- Shutdown a server encryption state.
-******************************************************************************/
-
-void srv_free_encryption_context(void)
-{
- return internal_free_encryption_context(&srv_trans_enc_state);
-}
-
-/******************************************************************************
- Free an encryption-allocated buffer.
-******************************************************************************/
-
-void srv_free_enc_buffer(char *buf)
-{
- return internal_free_enc_buffer(srv_trans_enc_state, buf);
-}
-
-/******************************************************************************
- Decrypt an incoming buffer.
-******************************************************************************/
-
-NTSTATUS srv_decrypt_buffer(char *buf)
-{
- return internal_decrypt_buffer(srv_trans_enc_state, buf);
-}
-
-/******************************************************************************
- Encrypt an outgoing buffer. Return the encrypted pointer in buf_out.
-******************************************************************************/
-
-NTSTATUS srv_encrypt_buffer(char *buffer, char **buf_out)
-{
- return internal_encrypt_buffer(srv_trans_enc_state, buffer, buf_out);
+ return common_encrypt_buffer(cli->trans_enc_state, cli->outbuf, buf_out);
}
diff --git a/source3/smbd/seal.c b/source3/smbd/seal.c
new file mode 100644
index 0000000000..2dd4fc8b62
--- /dev/null
+++ b/source3/smbd/seal.c
@@ -0,0 +1,257 @@
+/*
+ Unix SMB/CIFS implementation.
+ SMB Transport encryption (sealing) code - server code.
+ Copyright (C) Jeremy Allison 2007.
+
+ 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"
+
+/******************************************************************************
+ Server side encryption.
+******************************************************************************/
+
+/******************************************************************************
+ Global server state.
+******************************************************************************/
+
+struct smb_srv_trans_enc_ctx {
+ struct smb_trans_enc_state *es;
+ AUTH_NTLMSSP_STATE *auth_ntlmssp_state; /* Must be kept in sync with pointer in ec->ntlmssp_state. */
+};
+
+static struct smb_srv_trans_enc_ctx *partial_srv_trans_enc_ctx;
+static struct smb_srv_trans_enc_ctx *srv_trans_enc_ctx;
+
+/******************************************************************************
+ Is server encryption on ?
+******************************************************************************/
+
+BOOL srv_encryption_on(void)
+{
+ if (srv_trans_enc_ctx) {
+ return common_encryption_on(srv_trans_enc_ctx->es);
+ }
+ return False;
+}
+
+/******************************************************************************
+ Shutdown a server encryption state.
+******************************************************************************/
+
+static void srv_free_encryption_context(struct smb_srv_trans_enc_ctx **pp_ec)
+{
+ struct smb_srv_trans_enc_ctx *ec = *pp_ec;
+
+ if (!ec) {
+ return;
+ }
+
+ if (ec->es) {
+ struct smb_trans_enc_state *es = ec->es;
+ if (es->smb_enc_type == SMB_TRANS_ENC_NTLM &&
+ ec->auth_ntlmssp_state) {
+ auth_ntlmssp_end(&ec->auth_ntlmssp_state);
+ /* The auth_ntlmssp_end killed this already. */
+ es->ntlmssp_state = NULL;
+ }
+ common_free_encryption_state(&ec->es);
+ }
+
+ SAFE_FREE(ec);
+ *pp_ec = NULL;
+}
+
+/******************************************************************************
+ Free an encryption-allocated buffer.
+******************************************************************************/
+
+void srv_free_enc_buffer(char *buf)
+{
+ if (srv_trans_enc_ctx) {
+ return common_free_enc_buffer(srv_trans_enc_ctx->es, buf);
+ }
+}
+
+/******************************************************************************
+ Decrypt an incoming buffer.
+******************************************************************************/
+
+NTSTATUS srv_decrypt_buffer(char *buf)
+{
+ if (srv_trans_enc_ctx) {
+ return common_decrypt_buffer(srv_trans_enc_ctx->es, buf);
+ }
+ return NT_STATUS_OK;
+}
+
+/******************************************************************************
+ Encrypt an outgoing buffer. Return the encrypted pointer in buf_out.
+******************************************************************************/
+
+NTSTATUS srv_encrypt_buffer(char *buffer, char **buf_out)
+{
+ if (srv_trans_enc_ctx) {
+ return common_encrypt_buffer(srv_trans_enc_ctx->es, buffer, buf_out);
+ }
+ /* Not encrypting. */
+ *buf_out = buffer;
+ return NT_STATUS_OK;
+}
+
+/******************************************************************************
+ Do the gss encryption negotiation. Parameters are in/out.
+ Until success we do everything on the partial enc ctx.
+******************************************************************************/
+
+#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
+static NTSTATUS srv_enc_spnego_gss_negotiate(char **ppdata, size_t *p_data_size, DATA_BLOB *psecblob)
+{
+ return NT_STATUS_NOT_SUPPORTED;
+}
+#endif
+
+/******************************************************************************
+ Do the SPNEGO encryption negotiation. Parameters are in/out.
+ Covers the NTLM case. Based off code in smbd/sesssionsetup.c
+ Until success we do everything on the partial enc ctx.
+******************************************************************************/
+
+static NTSTATUS srv_enc_spnego_negotiate(unsigned char **ppdata, size_t *p_data_size)
+{
+ NTSTATUS status;
+ DATA_BLOB blob = data_blob(NULL,0);
+ DATA_BLOB secblob = data_blob(NULL, 0);
+ DATA_BLOB chal = data_blob(NULL, 0);
+ DATA_BLOB response = data_blob(NULL, 0);
+ BOOL got_kerberos_mechanism = False;
+ struct smb_srv_trans_enc_ctx *ec = NULL;
+
+ blob = data_blob_const(*ppdata, *p_data_size);
+
+ status = parse_spnego_mechanisms(blob, &secblob, &got_kerberos_mechanism);
+ if (!NT_STATUS_IS_OK(status)) {
+ return nt_status_squash(status);
+ }
+
+ /* We should have no partial context at this point. */
+
+ srv_free_encryption_context(&partial_srv_trans_enc_ctx);
+
+ partial_srv_trans_enc_ctx = SMB_MALLOC_P(struct smb_srv_trans_enc_ctx);
+ if (!partial_srv_trans_enc_ctx) {
+ data_blob_free(&secblob);
+ return NT_STATUS_NO_MEMORY;
+ }
+ ZERO_STRUCTP(partial_srv_trans_enc_ctx);
+
+#if defined(HAVE_GSSAPI_SUPPORT) && defined(HAVE_KRB5)
+ if (got_kerberos_mechanism && lp_use_kerberos_keytab()) ) {
+ status = srv_enc_spnego_gss_negotiate(ppdata, p_data_size, &secblob);
+ if (!NT_STATUS_IS_OK(status)) {
+ data_blob_free(&secblob);
+ srv_free_encryption_context(&partial_srv_trans_enc_ctx);
+ }
+ return status;
+ }
+#endif
+
+ /* Deal with an NTLM enc. setup. */
+ ec = partial_srv_trans_enc_ctx;
+
+ status = auth_ntlmssp_start(&ec->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ srv_free_encryption_context(&partial_srv_trans_enc_ctx);
+ return nt_status_squash(status);
+ }
+
+ status = auth_ntlmssp_update(ec->auth_ntlmssp_state, secblob, &chal);
+ data_blob_free(&secblob);
+
+ /* status here should be NT_STATUS_MORE_PROCESSING_REQUIRED
+ * for success ... */
+
+ response = spnego_gen_auth_response(&chal, status, OID_NTLMSSP);
+ data_blob_free(&chal);
+
+ SAFE_FREE(*ppdata);
+ *ppdata = response.data;
+ *p_data_size = response.length;
+
+ return status;
+}
+
+/******************************************************************************
+ Complete a SPNEGO encryption negotiation. Parameters are in/out.
+******************************************************************************/
+
+static NTSTATUS srv_enc_spnego_auth(unsigned char **ppdata, size_t *p_data_size)
+{
+ return NT_STATUS_NOT_SUPPORTED;
+}
+
+/******************************************************************************
+ Do the SPNEGO encryption negotiation. Parameters are in/out.
+******************************************************************************/
+
+NTSTATUS srv_request_encryption_setup(unsigned char **ppdata, size_t *p_data_size)
+{
+ unsigned char *pdata = *ppdata;
+
+ if (*p_data_size < 1) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (pdata[0] == ASN1_APPLICATION(0)) {
+ /*
+ * Until success we do everything on the partial
+ * enc state.
+ */
+ /* its a negTokenTarg packet */
+ return srv_enc_spnego_negotiate(ppdata, p_data_size);
+ }
+
+ if (pdata[0] == ASN1_CONTEXT(1)) {
+ /* Its a auth packet */
+ return srv_enc_spnego_auth(ppdata, p_data_size);
+ }
+
+ return NT_STATUS_INVALID_PARAMETER;
+}
+
+/******************************************************************************
+ Negotiation was successful - turn on server-side encryption.
+******************************************************************************/
+
+void srv_encryption_start(void)
+{
+ srv_free_encryption_context(&srv_trans_enc_ctx);
+ /* Steal the partial pointer. Deliberate shallow copy. */
+ srv_trans_enc_ctx = partial_srv_trans_enc_ctx;
+ srv_trans_enc_ctx->es->enc_on = True;
+
+ partial_srv_trans_enc_ctx = NULL;
+}
+
+/******************************************************************************
+ Shutdown all server contexts.
+******************************************************************************/
+
+void server_encryption_shutdown(void)
+{
+ srv_free_encryption_context(&partial_srv_trans_enc_ctx);
+ srv_free_encryption_context(&srv_trans_enc_ctx);
+}
diff --git a/source3/smbd/server.c b/source3/smbd/server.c
index 3f4313ce7f..348d3354d7 100644
--- a/source3/smbd/server.c
+++ b/source3/smbd/server.c
@@ -743,6 +743,8 @@ static void exit_server_common(enum server_exit_reason how,
locking_end();
printing_end();
+ server_encryption_shutdown();
+
if (how != SERVER_EXIT_NORMAL) {
int oldlevel = DEBUGLEVEL;
char *last_inbuf = get_InBuffer();
diff --git a/source3/smbd/sesssetup.c b/source3/smbd/sesssetup.c
index ff1b2821cc..91f4a9e12f 100644
--- a/source3/smbd/sesssetup.c
+++ b/source3/smbd/sesssetup.c
@@ -634,7 +634,7 @@ static BOOL reply_spnego_ntlmssp(connection_struct *conn, char *inbuf, char *out
Is this a krb5 mechanism ?
****************************************************************************/
-static NTSTATUS parse_spnego_mechanisms(DATA_BLOB blob_in, DATA_BLOB *pblob_out, BOOL *p_is_krb5)
+NTSTATUS parse_spnego_mechanisms(DATA_BLOB blob_in, DATA_BLOB *pblob_out, BOOL *p_is_krb5)
{
char *OIDs[ASN1_MAX_OIDS];
int i;
diff --git a/source3/smbd/trans2.c b/source3/smbd/trans2.c
index deb5db1baf..25fd6621e9 100644
--- a/source3/smbd/trans2.c
+++ b/source3/smbd/trans2.c
@@ -2758,6 +2758,33 @@ cap_low = 0x%x, cap_high = 0x%x\n",
}
break;
}
+ case SMB_REQUEST_TRANSPORT_ENCRYPTION:
+ {
+ NTSTATUS status;
+ size_t data_len = total_data;
+
+ if (!lp_unix_extensions()) {
+ return ERROR_NT(NT_STATUS_INVALID_LEVEL);
+ }
+
+ DEBUG( 4,("call_trans2setfsinfo: request transport encrption.\n"));
+
+ status = srv_request_encryption_setup((unsigned char **)&pdata, &data_len);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ error_packet_set(outbuf, 0, 0, status, __LINE__,__FILE__);
+ } else if (!NT_STATUS_IS_OK(status)) {
+ return ERROR_NT(status);
+ }
+
+ send_trans2_replies( outbuf, bufsize, params, 0, pdata, data_len, max_data_bytes);
+
+ if (NT_STATUS_IS_OK(status)) {
+ /* Server-side transport encryption is now *on*. */
+ srv_encryption_start();
+ }
+ return -1;
+ }
case SMB_FS_QUOTA_INFORMATION:
{
files_struct *fsp = NULL;