1 files changed, 396 insertions, 308 deletions

diff --git a/source3/rpc_parse/parse_sec.c b/source3/rpc_parse/parse_sec.c
index d4f4f8185f..541949e51e 100644
--- a/source3/rpc_parse/parse_sec.c
+++ b/source3/rpc_parse/parse_sec.c
@@ -2,10 +2,10 @@
  *  Unix SMB/Netbios implementation.
  *  Version 1.9.
  *  RPC Pipe client / server routines
- *  Copyright (C) Andrew Tridgell              1992-1999,
- *  Copyright (C) Jeremy R. Allison            1995-1999
- *  Copyright (C) Luke Kenneth Casson Leighton 1996-1999,
- *  Copyright (C) Paul Ashton                  1997-1999.
+ *  Copyright (C) Andrew Tridgell              1992-1998,
+ *  Copyright (C) Jeremy R. Allison            1995-1998
+ *  Copyright (C) Luke Kenneth Casson Leighton 1996-1998,
+ *  Copyright (C) Paul Ashton                  1997-1998.
  *  
  *  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
@@ -27,505 +27,593 @@
 
 extern int DEBUGLEVEL;
 
+#define SD_HEADER_SIZE 0x14
 
 /*******************************************************************
-makes a structure.
+ Sets up a SEC_ACCESS structure.
 ********************************************************************/
-BOOL make_sec_access(SEC_ACCESS *t, uint32 mask)
+
+void init_sec_access(SEC_ACCESS *t, uint32 mask)
 {
 	t->mask = mask;
-
-	return True;
 }
 
 /*******************************************************************
-reads or writes a structure.
+ Reads or writes a SEC_ACCESS structure.
 ********************************************************************/
+
 BOOL sec_io_access(char *desc, SEC_ACCESS *t, prs_struct *ps, int depth)
 {
-	if (t == NULL) return False;
+	if (t == NULL)
+		return False;
 
 	prs_debug(ps, depth, desc, "sec_io_access");
 	depth++;
 
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 	
-	prs_uint32("mask", ps, depth, &(t->mask));
+	if(!prs_uint32("mask", ps, depth, &(t->mask)))
+		return False;
 
 	return True;
 }
 
 
 /*******************************************************************
-makes a structure.
+ Sets up a SEC_ACE structure.
 ********************************************************************/
-BOOL make_sec_ace(SEC_ACE *t, DOM_SID *sid, uint8 type, SEC_ACCESS mask, uint8 flag)
+
+void init_sec_ace(SEC_ACE *t, DOM_SID *sid, uint8 type, SEC_ACCESS mask, uint8 flag)
 {
 	t->type = type;
 	t->flags = flag;
 	t->size = sid_size(sid) + 8;
 	t->info = mask;
 
+	ZERO_STRUCTP(&t->sid);
 	sid_copy(&t->sid, sid);
-
-	return True;
 }
 
 /*******************************************************************
-reads or writes a structure.
+ Reads or writes a SEC_ACE structure.
 ********************************************************************/
-BOOL sec_io_ace(char *desc, SEC_ACE *t, prs_struct *ps, int depth)
+
+BOOL sec_io_ace(char *desc, SEC_ACE *psa, prs_struct *ps, int depth)
 {
 	uint32 old_offset;
 	uint32 offset_ace_size;
-	if (t == NULL) return False;
+
+	if (psa == NULL)
+		return False;
 
 	prs_debug(ps, depth, desc, "sec_io_ace");
 	depth++;
 
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 	
-	old_offset = ps->offset;
+	old_offset = prs_offset(ps);
+
+	if(!prs_uint8("type ", ps, depth, &psa->type))
+		return False;
+
+	if(!prs_uint8("flags", ps, depth, &psa->flags))
+		return False;
 
-	prs_uint8     ("type ", ps, depth, &(t->type));
-	prs_uint8     ("flags", ps, depth, &(t->flags));
-	prs_uint16_pre("size ", ps, depth, &(t->size ), &offset_ace_size);
+	if(!prs_uint16_pre("size ", ps, depth, &psa->size, &offset_ace_size))
+		return False;
+
+	if(!sec_io_access("info ", &psa->info, ps, depth))
+		return False;
 
-	sec_io_access   ("info ", &t->info, ps, depth);
-	prs_align(ps);
-	smb_io_dom_sid("sid  ", &t->sid , ps, depth);
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 
-	prs_uint16_post("size ", ps, depth, &t->size, offset_ace_size, old_offset);
+	if(!smb_io_dom_sid("sid  ", &psa->sid , ps, depth))
+		return False;
+
+	if(!prs_uint16_post("size ", ps, depth, &psa->size, offset_ace_size, old_offset))
+		return False;
 
 	return True;
 }
 
 /*******************************************************************
-makes a structure.  
+ Create a SEC_ACL structure.  
 ********************************************************************/
-BOOL make_sec_acl(SEC_ACL *t, uint16 revision, int num_aces, SEC_ACE *ace)
+
+SEC_ACL *make_sec_acl(uint16 revision, int num_aces, SEC_ACE *ace_list)
 {
+	SEC_ACL *dst;
 	int i;
-	t->revision = revision;
-	t->num_aces = num_aces;
-	t->size = 4;
-	t->ace = ace;
-
-	for (i = 0; i < num_aces; i++)
-	{
-		t->size += ace[i].size;
+
+	if((dst = (SEC_ACL *)malloc(sizeof(SEC_ACL))) == NULL)
+		return NULL;
+
+	ZERO_STRUCTP(dst);
+
+	dst->revision = revision;
+	dst->num_aces = num_aces;
+	dst->size = 8;
+
+	if((dst->ace_list = (SEC_ACE *)malloc( sizeof(SEC_ACE) * num_aces )) == NULL) {
+		free_sec_acl(&dst);
+		return NULL;
 	}
 
-	return True;
+	for (i = 0; i < num_aces; i++) {
+		dst->ace_list[i] = ace_list[i]; /* Structure copy. */
+		dst->size += ace_list[i].size;
+	}
+
+	return dst;
 }
 
 /*******************************************************************
-frees a structure.  
+ Duplicate a SEC_ACL structure.  
 ********************************************************************/
-void free_sec_acl(SEC_ACL *t)
+
+SEC_ACL *dup_sec_acl( SEC_ACL *src)
 {
-	if (t->ace != NULL)
-	{
-		free(t->ace);
-	}
+	if(src == NULL)
+		return NULL;
+
+	return make_sec_acl( src->revision, src->num_aces, src->ace_list);
 }
 
 /*******************************************************************
-reads or writes a structure.  
+ Delete a SEC_ACL structure.  
+********************************************************************/
+
+void free_sec_acl(SEC_ACL **ppsa)
+{
+	SEC_ACL *psa;
 
-first of the xx_io_xx functions that allocates its data structures
+	if(ppsa == NULL || *ppsa == NULL)
+		return;
+
+	psa = *ppsa;
+	if (psa->ace_list != NULL)
+		free(psa->ace_list);
+
+	free(psa);
+	*ppsa = NULL;
+}
+
+/*******************************************************************
+ Reads or writes a SEC_ACL structure.  
+
+ First of the xx_io_xx functions that allocates its data structures
  for you as it reads them.
 ********************************************************************/
-BOOL sec_io_acl(char *desc, SEC_ACL *t, prs_struct *ps, int depth)
+
+BOOL sec_io_acl(char *desc, SEC_ACL **ppsa, prs_struct *ps, int depth)
 {
-	uint32 i;
+	int i;
 	uint32 old_offset;
 	uint32 offset_acl_size;
+	SEC_ACL *psa;
 
-	if (t == NULL) return False;
+	if (ppsa == NULL)
+		return False;
+
+	psa = *ppsa;
+
+	if(UNMARSHALLING(ps) && psa == NULL) {
+		/*
+		 * This is a read and we must allocate the stuct to read into.
+		 */
+		if((psa = (SEC_ACL *)malloc(sizeof(SEC_ACL))) == NULL)
+			return False;
+		ZERO_STRUCTP(psa);
+		*ppsa = psa;
+	}
 
 	prs_debug(ps, depth, desc, "sec_io_acl");
 	depth++;
 
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 	
-	old_offset = ps->offset;
+	old_offset = prs_offset(ps);
 
-	prs_uint16("revision", ps, depth, &(t->revision));
-	prs_uint16_pre("size     ", ps, depth, &(t->size     ), &offset_acl_size);
-	prs_uint32("num_aces ", ps, depth, &(t->num_aces ));
+	if(!prs_uint16("revision", ps, depth, &psa->revision))
+		return False;
 
-	if (ps->io && t->num_aces != 0)
-	{
-		/* reading */
-		t->ace = (SEC_ACE*)malloc(sizeof(t->ace[0]) * t->num_aces);
-		ZERO_STRUCTP(t->ace);
-		}
+	if(!prs_uint16_pre("size     ", ps, depth, &psa->size, &offset_acl_size))
+		return False;
 
-	if (t->ace == NULL && t->num_aces != 0)
-	{
-		DEBUG(0,("INVALID ACL\n"));
-		ps->offset = 0xfffffffe;
+	if(!prs_uint32("num_aces ", ps, depth, &psa->num_aces))
 		return False;
+
+	if (UNMARSHALLING(ps) && psa->num_aces != 0) {
+		/* reading */
+		if((psa->ace_list = malloc(sizeof(psa->ace_list[0]) * psa->num_aces)) == NULL)
+			return False;
+		ZERO_STRUCTP(psa->ace_list);
 	}
 
-	for (i = 0; i < MIN(t->num_aces, MAX_SEC_ACES); i++)
-	{
+	for (i = 0; i < psa->num_aces; i++) {
 		fstring tmp;
-		slprintf(tmp, sizeof(tmp)-1, "ace[%02d]: ", i);
-		sec_io_ace(tmp, &t->ace[i], ps, depth);
+		slprintf(tmp, sizeof(tmp)-1, "ace_list[%02d]: ", i);
+		if(!sec_io_ace(tmp, &psa->ace_list[i], ps, depth))
+			return False;
 	}
 
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 
-	prs_uint16_post("size     ", ps, depth, &t->size    , offset_acl_size, old_offset);
+	if(!prs_uint16_post("size     ", ps, depth, &psa->size, offset_acl_size, old_offset))
+		return False;
 
 	return True;
 }
 
-
 /*******************************************************************
-makes a structure
+ Creates a SEC_DESC structure
 ********************************************************************/
-int make_sec_desc(SEC_DESC *t, uint16 revision, uint16 type,
+
+SEC_DESC *make_sec_desc(uint16 revision, uint16 type,
 			DOM_SID *owner_sid, DOM_SID *grp_sid,
-				SEC_ACL *sacl, SEC_ACL *dacl)
+			SEC_ACL *sacl, SEC_ACL *dacl, size_t *sec_desc_size)
 {
+	SEC_DESC *dst;
 	uint32 offset;
 
-	t->revision = revision;
-	t->type     = type;
+	*sec_desc_size = 0;
+
+	if(( dst = (SEC_DESC *)malloc(sizeof(SEC_DESC))) == NULL)
+		return NULL;
+
+	ZERO_STRUCTP(dst);
+
+	dst->revision = revision;
+	dst->type     = type;
+
+	dst->off_owner_sid = 0;
+	dst->off_grp_sid   = 0;
+	dst->off_sacl      = 0;
+	dst->off_dacl      = 0;
+
+	if(owner_sid && ((dst->owner_sid = sid_dup(owner_sid)) == NULL))
+		goto error_exit;
 
-	t->off_owner_sid = 0;
-	t->off_grp_sid   = 0;
-	t->off_sacl      = 0;
-	t->off_dacl      = 0;
+	if(grp_sid && ((dst->grp_sid = sid_dup(grp_sid)) == NULL))
+		goto error_exit;
 
-	t->dacl      = dacl;
-	t->sacl      = sacl;
-	t->owner_sid = owner_sid;
-	t->grp_sid   = grp_sid;
+	if(sacl && ((dst->sacl = dup_sec_acl(sacl)) == NULL))
+		goto error_exit;
 
+	if(dacl && ((dst->dacl = dup_sec_acl(dacl)) == NULL))
+		goto error_exit;
+		
 	offset = 0x0;
 
-	if (dacl != NULL)
-	{
+	/*
+	 * Work out the linearization sizes.
+	 */
+
+	if (dst->owner_sid != NULL) {
+
 		if (offset == 0)
-		{
-			offset = 0x14;
-		}
-		t->off_dacl = offset;
-		offset += dacl->size;
+			offset = SD_HEADER_SIZE;
+
+		dst->off_owner_sid = offset;
+		offset += ((sid_size(dst->owner_sid) + 3) & ~3);
 	}
 
-	if (sacl != NULL)
-	{
+	if (dst->grp_sid != NULL) {
+
 		if (offset == 0)
-		{
-			offset = 0x14;
-		}
-		t->off_dacl = offset;
-		offset += dacl->size;
+			offset = SD_HEADER_SIZE;
+
+		dst->off_grp_sid = offset;
+		offset += ((sid_size(dst->grp_sid) + 3) & ~3);
 	}
 
-	if (owner_sid != NULL)
-	{
+	if (dst->sacl != NULL) {
+
 		if (offset == 0)
-		{
-			offset = 0x14;
-		}
-		t->off_owner_sid = offset;
-		offset += sid_size(owner_sid);
+			offset = SD_HEADER_SIZE;
+
+		dst->off_sacl = offset;
+		offset += ((sacl->size + 3) & ~3);
 	}
 
-	if (grp_sid != NULL)
-	{
+	if (dst->dacl != NULL) {
+
 		if (offset == 0)
-		{
-			offset = 0x14;
-		}
-		t->off_grp_sid = offset;
-		offset += sid_size(grp_sid);
+			offset = SD_HEADER_SIZE;
+
+		dst->off_dacl = offset;
+		offset += ((dacl->size + 3) & ~3);
 	}
 
-	return (offset == 0) ? 0x14 : offset;
+	*sec_desc_size = (size_t)((offset == 0) ? SD_HEADER_SIZE : offset);
+	return dst;
+
+error_exit:
+
+	*sec_desc_size = 0;
+	free_sec_desc(&dst);
+	return NULL;
 }
 
+/*******************************************************************
+ Duplicate a SEC_DESC structure.  
+********************************************************************/
+
+SEC_DESC *dup_sec_desc( SEC_DESC *src)
+{
+	size_t dummy;
+
+	if(src == NULL)
+		return NULL;
+
+	return make_sec_desc( src->revision, src->type, 
+				src->owner_sid, src->grp_sid, src->sacl,
+				src->dacl, &dummy);
+}
 
 /*******************************************************************
-frees a structure
+ Deletes a SEC_DESC structure
 ********************************************************************/
-void free_sec_desc(SEC_DESC *t)
+
+void free_sec_desc(SEC_DESC **ppsd)
 {
-	if (t->dacl != NULL)
-	{
-		free_sec_acl(t->dacl);
-	}
+	SEC_DESC *psd;
 
-	if (t->sacl != NULL)
-	{
-		free_sec_acl(t->dacl);
+	if(ppsd == NULL || *ppsd == NULL)
+		return;
 
-	}
+	psd = *ppsd;
 
-	if (t->owner_sid != NULL)
-	{
-		free(t->owner_sid);
-	}
+	free_sec_acl(&psd->dacl);
+	free_sec_acl(&psd->dacl);
+	free(psd->owner_sid);
+	free(psd->grp_sid);
+	free(psd);
+	*ppsd = NULL;
+}
 
-	if (t->grp_sid != NULL)
-	{
-		free(t->grp_sid);
-	}
+/*******************************************************************
+ Creates a SEC_DESC structure with typical defaults.
+********************************************************************/
+
+SEC_DESC *make_standard_sec_desc(DOM_SID *owner_sid, DOM_SID *grp_sid,
+				 SEC_ACL *dacl, size_t *sec_desc_size)
+{
+	return make_sec_desc(1, SEC_DESC_SELF_RELATIVE|SEC_DESC_DACL_PRESENT,
+			     owner_sid, grp_sid, NULL, dacl, sec_desc_size);
 }
 
 
 /*******************************************************************
-reads or writes a structure.
+ Reads or writes a SEC_DESC structure.
+ If reading and the *ppsd = NULL, allocates the structure.
 ********************************************************************/
-static BOOL sec_io_desc(char *desc, SEC_DESC *t, prs_struct *ps, int depth)
+
+BOOL sec_io_desc(char *desc, SEC_DESC **ppsd, prs_struct *ps, int depth)
 {
-#if 0
-	uint32 off_owner_sid;
-	uint32 off_grp_sid  ;
-	uint32 off_sacl     ;
-	uint32 off_dacl     ;
-#endif
 	uint32 old_offset;
 	uint32 max_offset = 0; /* after we're done, move offset to end */
+	SEC_DESC *psd;
+
+	if (ppsd == NULL)
+		return False;
 
-	if (t == NULL) return False;
+	psd = *ppsd;
+
+	if(UNMARSHALLING(ps) && psd == NULL) {
+		if((psd = (SEC_DESC *)malloc(sizeof(SEC_DESC))) == NULL)
+			return False;
+		ZERO_STRUCTP(psd);
+		*ppsd = psd;
+	}
 
 	prs_debug(ps, depth, desc, "sec_io_desc");
 	depth++;
 
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 	
 	/* start of security descriptor stored for back-calc offset purposes */
-	old_offset = ps->offset;
-
-	prs_uint16("revision ", ps, depth, &(t->revision ));
-	prs_uint16("type     ", ps, depth, &(t->type     ));
-
-	prs_uint32("off_owner_sid", ps, depth, &(t->off_owner_sid));
-	prs_uint32("off_grp_sid  ", ps, depth, &(t->off_grp_sid  ));
-	prs_uint32("off_sacl     ", ps, depth, &(t->off_sacl     ));
-	prs_uint32("off_dacl     ", ps, depth, &(t->off_dacl     ));
-#if 0
-	prs_uint32_pre("off_owner_sid", ps, depth, &(t->off_owner_sid), &off_owner_sid);
-	prs_uint32_pre("off_grp_sid  ", ps, depth, &(t->off_grp_sid  ), &off_grp_sid  );
-	prs_uint32_pre("off_sacl     ", ps, depth, &(t->off_sacl     ), &off_sacl     );
-	prs_uint32_pre("off_dacl     ", ps, depth, &(t->off_dacl     ), &off_dacl     );
-#endif
-	max_offset = MAX(max_offset, ps->offset);
-
-	if (IS_BITS_SET_ALL(t->type, SEC_DESC_DACL_PRESENT))
-	{
-#if 0
-		prs_uint32_post("off_dacl    ", ps, depth, &(t->off_dacl     ), off_dacl     , ps->offset - old_offset);
-#endif
-		ps->offset = old_offset + t->off_dacl;
-		if (ps->io)
-		{
-			/* reading */
-			t->dacl = (SEC_ACL*)malloc(sizeof(*t->dacl));
-			ZERO_STRUCTP(t->dacl);
-		}
+	old_offset = prs_offset(ps);
 
-		if (t->dacl == NULL)
-		{
-			DEBUG(0,("INVALID DACL\n"));
-			ps->offset = 0xfffffffe;
-			return False;
-		}
+	if(!prs_uint16("revision ", ps, depth, &psd->revision))
+		return False;
 
-		sec_io_acl     ("dacl"        , t->dacl       , ps, depth);
-		prs_align(ps);
-	}
-#if 0
-	else
-	{
-		prs_uint32_post("off_dacl    ", ps, depth, &(t->off_dacl     ), off_dacl     , 0);
-	}
-#endif
-
-	max_offset = MAX(max_offset, ps->offset);
-
-	if (IS_BITS_SET_ALL(t->type, SEC_DESC_SACL_PRESENT))
-	{
-#if 0
-		prs_uint32_post("off_sacl  ", ps, depth, &(t->off_sacl  ), off_sacl  , ps->offset - old_offset);
-#endif
-		ps->offset = old_offset + t->off_sacl;
-		if (ps->io)
-		{
-			/* reading */
-			t->sacl = (SEC_ACL*)malloc(sizeof(*t->sacl));
-			ZERO_STRUCTP(t->sacl);
-		}
+	if(!prs_uint16("type     ", ps, depth, &psd->type))
+		return False;
 
-		if (t->sacl == NULL)
-		{
-			DEBUG(0,("INVALID SACL\n"));
-			ps->offset = 0xfffffffe;
-			return False;
-		}
+	if(!prs_uint32("off_owner_sid", ps, depth, &psd->off_owner_sid))
+		return False;
 
-		sec_io_acl     ("sacl"      , t->sacl       , ps, depth);
-		prs_align(ps);
-	}
-#if 0
-	else
-	{
-		prs_uint32_post("off_sacl  ", ps, depth, &(t->off_sacl  ), off_sacl  , 0);
-	}
-#endif
-
-	max_offset = MAX(max_offset, ps->offset);
-
-#if 0
-	prs_uint32_post("off_owner_sid", ps, depth, &(t->off_owner_sid), off_owner_sid, ps->offset - old_offset);
-#endif
-	if (t->off_owner_sid != 0)
-	{
-		if (ps->io)
-		{
-			ps->offset = old_offset + t->off_owner_sid;
-			}
-		if (ps->io)
-		{
+	if(!prs_uint32("off_grp_sid  ", ps, depth, &psd->off_grp_sid))
+		return False;
+
+	if(!prs_uint32("off_sacl     ", ps, depth, &psd->off_sacl))
+		return False;
+
+	if(!prs_uint32("off_dacl     ", ps, depth, &psd->off_dacl))
+		return False;
+
+	max_offset = MAX(max_offset, prs_offset(ps));
+
+	if (psd->off_owner_sid != 0) {
+
+		if (UNMARSHALLING(ps)) {
+			if(!prs_set_offset(ps, old_offset + psd->off_owner_sid))
+				return False;
 			/* reading */
-			t->owner_sid = (DOM_SID*)malloc(sizeof(*t->owner_sid));
-			ZERO_STRUCTP(t->owner_sid);
+			if((psd->owner_sid = malloc(sizeof(*psd->owner_sid))) == NULL)
+				return False;
+			ZERO_STRUCTP(psd->owner_sid);
 		}
 
-		if (t->owner_sid == NULL)
-		{
-			DEBUG(0,("INVALID OWNER SID\n"));
-			ps->offset = 0xfffffffe;
+		if(!smb_io_dom_sid("owner_sid ", psd->owner_sid , ps, depth))
+			return False;
+		if(!prs_align(ps))
 			return False;
-		}
-
-		smb_io_dom_sid("owner_sid ", t->owner_sid , ps, depth);
-		prs_align(ps);
 	}
 
-	max_offset = MAX(max_offset, ps->offset);
+	max_offset = MAX(max_offset, prs_offset(ps));
 
-#if 0
-	prs_uint32_post("off_grp_sid  ", ps, depth, &(t->off_grp_sid  ), off_grp_sid  , ps->offset - old_offset);
-#endif
-	if (t->off_grp_sid != 0)
-	{
-		if (ps->io)
-		{
-			ps->offset = old_offset + t->off_grp_sid;
+	if (psd->off_grp_sid != 0) {
 
-		}
-		if (ps->io)
-		{
+		if (UNMARSHALLING(ps)) {
 			/* reading */
-			t->grp_sid = (DOM_SID*)malloc(sizeof(*t->grp_sid));
-			ZERO_STRUCTP(t->grp_sid);
+			if(!prs_set_offset(ps, old_offset + psd->off_grp_sid))
+				return False;
+			if((psd->grp_sid = malloc(sizeof(*psd->grp_sid))) == NULL)
+				return False;
+			ZERO_STRUCTP(psd->grp_sid);
 		}
 
-		if (t->grp_sid == NULL)
-		{
-			DEBUG(0,("INVALID GROUP SID\n"));
-			ps->offset = 0xfffffffe;
+		if(!smb_io_dom_sid("grp_sid", psd->grp_sid, ps, depth))
 			return False;
-		}
+		if(!prs_align(ps))
+			return False;
+	}
+
+	max_offset = MAX(max_offset, prs_offset(ps));
 
-		smb_io_dom_sid("grp_sid", t->grp_sid, ps, depth);
-		prs_align(ps);
+	if (IS_BITS_SET_ALL(psd->type, SEC_DESC_SACL_PRESENT) && psd->off_sacl) {
+		if(!prs_set_offset(ps, old_offset + psd->off_sacl))
+			return False;
+		if(!sec_io_acl("sacl", &psd->sacl, ps, depth))
+			return False;
+		if(!prs_align(ps))
+			return False;
 	}
 
-	max_offset = MAX(max_offset, ps->offset);
+	max_offset = MAX(max_offset, prs_offset(ps));
+
+	if (IS_BITS_SET_ALL(psd->type, SEC_DESC_DACL_PRESENT) && psd->off_dacl != 0) {
+		if(!prs_set_offset(ps, old_offset + psd->off_dacl))
+			return False;
+		if(!sec_io_acl("dacl", &psd->dacl, ps, depth))
+			return False;
+		if(!prs_align(ps))
+			return False;
+	}
 
-	ps->offset = max_offset;
+	max_offset = MAX(max_offset, prs_offset(ps));
 
+	if(!prs_set_offset(ps, max_offset))
+		return False;
 	return True;
 }
 
 /*******************************************************************
-creates a SEC_DESC_BUF structure.
+ Creates a SEC_DESC_BUF structure.
 ********************************************************************/
-BOOL make_sec_desc_buf(SEC_DESC_BUF *buf, int len, SEC_DESC *data)
+
+SEC_DESC_BUF *make_sec_desc_buf(int len, SEC_DESC *sec_desc)
 {
-	ZERO_STRUCTP(buf);
+	SEC_DESC_BUF *dst;
+
+	if((dst = (SEC_DESC_BUF *)malloc(sizeof(SEC_DESC_BUF))) == NULL)
+		return NULL;
+
+	ZERO_STRUCTP(dst);
 
 	/* max buffer size (allocated size) */
-	buf->max_len = len;
-	buf->undoc       = 0;
-	buf->len = data != NULL ? len : 0;
-	buf->sec = data;
+	dst->max_len = len;
+	dst->len = len;
 
-	return True;
+	if(sec_desc && ((dst->sec = dup_sec_desc(sec_desc)) == NULL)) {
+		free_sec_desc_buf(&dst);
+		return NULL;
+	}
+
+	return dst;
 }
 
 /*******************************************************************
-frees a SEC_DESC_BUF structure.
+ Duplicates a SEC_DESC_BUF structure.
 ********************************************************************/
-void free_sec_desc_buf(SEC_DESC_BUF *buf)
+
+SEC_DESC_BUF *dup_sec_desc_buf(SEC_DESC_BUF *src)
 {
-	if (buf->sec != NULL)
-	{
-		free_sec_desc(buf->sec);
-		free(buf->sec);
-	}
+	if(src == NULL)
+		return NULL;
+
+	return make_sec_desc_buf( src->len, src->sec);
+}
+
+/*******************************************************************
+ Deletes a SEC_DESC_BUF structure.
+********************************************************************/
+
+void free_sec_desc_buf(SEC_DESC_BUF **ppsdb)
+{
+	SEC_DESC_BUF *psdb;
+
+	if(ppsdb == NULL || *ppsdb == NULL)
+		return;
+
+	psdb = *ppsdb;
+	free_sec_desc(&psdb->sec);
+	free(psdb);
+	*ppsdb = NULL;
 }
 
 
 /*******************************************************************
-reads or writes a SEC_DESC_BUF structure.
+ Reads or writes a SEC_DESC_BUF structure.
 ********************************************************************/
-BOOL sec_io_desc_buf(char *desc, SEC_DESC_BUF *sec, prs_struct *ps, int depth)
+
+BOOL sec_io_desc_buf(char *desc, SEC_DESC_BUF **ppsdb, prs_struct *ps, int depth)
 {
 	uint32 off_len;
 	uint32 off_max_len;
 	uint32 old_offset;
 	uint32 size;
+	SEC_DESC_BUF *psdb;
+
+	if (ppsdb == NULL)
+		return False;
 
-	if (sec == NULL) return False;
+	psdb = *ppsdb;
+
+	if (UNMARSHALLING(ps) && psdb == NULL) {
+		if((psdb = (SEC_DESC_BUF *)malloc(sizeof(SEC_DESC_BUF))) == NULL)
+			return False;
+		ZERO_STRUCTP(psdb);
+		*ppsdb = psdb;
+	}
 
 	prs_debug(ps, depth, desc, "sec_io_desc_buf");
 	depth++;
 
-	prs_align(ps);
+	if(!prs_align(ps))
+		return False;
 	
-	prs_uint32_pre("max_len", ps, depth, &(sec->max_len), &off_max_len);
-	prs_uint32    ("undoc  ", ps, depth, &(sec->undoc  ));
-	prs_uint32_pre("len    ", ps, depth, &(sec->len    ), &off_len);
+	if(!prs_uint32_pre("max_len", ps, depth, &psdb->max_len, &off_max_len))
+		return False;
 
-	old_offset = ps->offset;
+	if(!prs_uint32    ("undoc  ", ps, depth, &psdb->undoc))
+		return False;
 
-	if (sec->len != 0 && ps->io)
-	{
-		/* reading */
-		sec->sec = (SEC_DESC*)malloc(sizeof(*sec->sec));
-		ZERO_STRUCTP(sec->sec);
+	if(!prs_uint32_pre("len    ", ps, depth, &psdb->len, &off_len))
+		return False;
 
-		if (sec->sec == NULL)
-		{
-			DEBUG(0,("INVALID SEC_DESC\n"));
-			ps->offset = 0xfffffffe;
-			return False;
-		}
-	}
+	old_offset = prs_offset(ps);
 
 	/* reading, length is non-zero; writing, descriptor is non-NULL */
-	if ((sec->len != 0 || (!ps->io)) && sec->sec != NULL)
-	{
-		sec_io_desc("sec   ", sec->sec, ps, depth);
+	if ((psdb->len != 0 || MARSHALLING(ps)) && psdb->sec != NULL) {
+		if(!sec_io_desc("sec   ", &psdb->sec, ps, depth))
+			return False;
 	}
 
-	prs_align(ps);
-	
-	size = ps->offset - old_offset;
-	prs_uint32_post("max_len", ps, depth, &(sec->max_len), off_max_len, size == 0 ? sec->max_len : size + 8);
-	prs_uint32_post("len    ", ps, depth, &(sec->len    ), off_len    , size == 0 ? 0 : size + 8);
+	size = prs_offset(ps) - old_offset;
+	if(!prs_uint32_post("max_len", ps, depth, &psdb->max_len, off_max_len, size == 0 ? psdb->max_len : size))
+		return False;
+
+	if(!prs_uint32_post("len    ", ps, depth, &psdb->len, off_len, size))
+		return False;
 
 	return True;
 }
-