samba-mirror/source3/rpc_parse/parse_misc.c

/* 
 *  Unix SMB/CIFS implementation.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell              1992-1997,
 *  Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
 *  Copyright (C) Paul Ashton                       1997.
 *  Copyright (C) Gerald (Jerry) Carter             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 3 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, see <http://www.gnu.org/licenses/>.
 */

#include "includes.h"

#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_PARSE

/*******************************************************************
 Reads or writes a UTIME type.
********************************************************************/

static bool smb_io_utime(const char *desc, UTIME *t, prs_struct *ps, int depth)
{
	if (t == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_utime");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32 ("time", ps, depth, &t->time))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes an NTTIME structure.
********************************************************************/

bool smb_io_time(const char *desc, NTTIME *nttime, prs_struct *ps, int depth)
{
	uint32 low, high;
	if (nttime == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_time");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if (MARSHALLING(ps)) {
		low = *nttime & 0xFFFFFFFF;
		high = *nttime >> 32;
	}
	
	if(!prs_uint32("low ", ps, depth, &low)) /* low part */
		return False;
	if(!prs_uint32("high", ps, depth, &high)) /* high part */
		return False;

	if (UNMARSHALLING(ps)) {
		*nttime = (((uint64_t)high << 32) + low);
	}

	return True;
}

/*******************************************************************
 Reads or writes an NTTIME structure.
********************************************************************/

bool smb_io_nttime(const char *desc, prs_struct *ps, int depth, NTTIME *nttime)
{
	return smb_io_time( desc, nttime, ps, depth );
}

/*******************************************************************
 Gets an enumeration handle from an ENUM_HND structure.
********************************************************************/

uint32 get_enum_hnd(ENUM_HND *enh)
{
	return (enh && enh->ptr_hnd != 0) ? enh->handle : 0;
}

/*******************************************************************
 Inits an ENUM_HND structure.
********************************************************************/

void init_enum_hnd(ENUM_HND *enh, uint32 hnd)
{
	DEBUG(5,("smb_io_enum_hnd\n"));

	enh->ptr_hnd = (hnd != 0) ? 1 : 0;
	enh->handle = hnd;
}

/*******************************************************************
 Reads or writes an ENUM_HND structure.
********************************************************************/

bool smb_io_enum_hnd(const char *desc, ENUM_HND *hnd, prs_struct *ps, int depth)
{
	if (hnd == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_enum_hnd");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("ptr_hnd", ps, depth, &hnd->ptr_hnd)) /* pointer */
		return False;

	if (hnd->ptr_hnd != 0) {
		if(!prs_uint32("handle ", ps, depth, &hnd->handle )) /* enum handle */
			return False;
	}

	return True;
}

/*******************************************************************
 Reads or writes a DOM_SID structure.
********************************************************************/

bool smb_io_dom_sid(const char *desc, DOM_SID *sid, prs_struct *ps, int depth)
{
	int i;

	if (sid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_dom_sid");
	depth++;

	if(!prs_uint8 ("sid_rev_num", ps, depth, &sid->sid_rev_num))
		return False;

	if(!prs_uint8 ("num_auths  ", ps, depth, &sid->num_auths))
		return False;

	for (i = 0; i < 6; i++)
	{
		fstring tmp;
		slprintf(tmp, sizeof(tmp) - 1, "id_auth[%d] ", i);
		if(!prs_uint8 (tmp, ps, depth, &sid->id_auth[i]))
			return False;
	}

	/* oops! XXXX should really issue a warning here... */
	if (sid->num_auths > MAXSUBAUTHS)
		sid->num_auths = MAXSUBAUTHS;

	if(!prs_uint32s(False, "sub_auths ", ps, depth, sid->sub_auths, sid->num_auths))
		return False;

	return True;
}

/*******************************************************************
 Inits a DOM_SID2 structure.
********************************************************************/

void init_dom_sid2(DOM_SID2 *sid2, const DOM_SID *sid)
{
	sid2->sid = *sid;
	sid2->num_auths = sid2->sid.num_auths;
}

/*******************************************************************
 Reads or writes a DOM_SID2 structure.
********************************************************************/

bool smb_io_dom_sid2_p(const char *desc, prs_struct *ps, int depth, DOM_SID2 **sid2)
{
	uint32 data_p;

	/* caputure the pointer value to stream */

	data_p = *sid2 ? 0xf000baaa : 0;

	if ( !prs_uint32("dom_sid2_p", ps, depth, &data_p ))
		return False;

	/* we're done if there is no data */

	if ( !data_p )
		return True;

	if (UNMARSHALLING(ps)) {
		if ( !(*sid2 = PRS_ALLOC_MEM(ps, DOM_SID2, 1)) )
			return False;
	}

	return True;
}
/*******************************************************************
 Reads or writes a DOM_SID2 structure.
********************************************************************/

bool smb_io_dom_sid2(const char *desc, DOM_SID2 *sid, prs_struct *ps, int depth)
{
	if (sid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_dom_sid2");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("num_auths", ps, depth, &sid->num_auths))
		return False;

	if(!smb_io_dom_sid("sid", &sid->sid, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes a struct GUID
********************************************************************/

bool smb_io_uuid(const char *desc, struct GUID *uuid, 
		 prs_struct *ps, int depth)
{
	if (uuid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_uuid");
	depth++;

	if(!prs_uint32 ("data   ", ps, depth, &uuid->time_low))
		return False;
	if(!prs_uint16 ("data   ", ps, depth, &uuid->time_mid))
		return False;
	if(!prs_uint16 ("data   ", ps, depth, &uuid->time_hi_and_version))
		return False;

	if(!prs_uint8s (False, "data   ", ps, depth, uuid->clock_seq, sizeof(uuid->clock_seq)))
		return False;
	if(!prs_uint8s (False, "data   ", ps, depth, uuid->node, sizeof(uuid->node)))
		return False;

	return True;
}

/*******************************************************************
creates a STRHDR structure.
********************************************************************/

void init_str_hdr(STRHDR *hdr, int max_len, int len, uint32 buffer)
{
	hdr->str_max_len = max_len;
	hdr->str_str_len = len;
	hdr->buffer      = buffer;
}

/*******************************************************************
 Reads or writes a STRHDR structure.
********************************************************************/

bool smb_io_strhdr(const char *desc,  STRHDR *hdr, prs_struct *ps, int depth)
{
	if (hdr == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_strhdr");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint16("str_str_len", ps, depth, &hdr->str_str_len))
		return False;
	if(!prs_uint16("str_max_len", ps, depth, &hdr->str_max_len))
		return False;
	if(!prs_uint32("buffer     ", ps, depth, &hdr->buffer))
		return False;

	return True;
}

/*******************************************************************
 Inits a UNIHDR structure.
********************************************************************/

void init_uni_hdr(UNIHDR *hdr, UNISTR2 *str2)
{
	hdr->uni_str_len = 2 * (str2->uni_str_len);
	hdr->uni_max_len = 2 * (str2->uni_max_len);
	hdr->buffer = (str2->uni_str_len != 0) ? 1 : 0;
}

/*******************************************************************
 Reads or writes a UNIHDR structure.
********************************************************************/

bool smb_io_unihdr(const char *desc, UNIHDR *hdr, prs_struct *ps, int depth)
{
	if (hdr == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_unihdr");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint16("uni_str_len", ps, depth, &hdr->uni_str_len))
		return False;
	if(!prs_uint16("uni_max_len", ps, depth, &hdr->uni_max_len))
		return False;
	if(!prs_uint32("buffer     ", ps, depth, &hdr->buffer))
		return False;

	return True;
}

/*******************************************************************
 Inits a BUFHDR structure.
********************************************************************/

void init_buf_hdr(BUFHDR *hdr, int max_len, int len)
{
	hdr->buf_max_len = max_len;
	hdr->buf_len     = len;
}

/*******************************************************************
 prs_uint16 wrapper. Call this and it sets up a pointer to where the
 uint16 should be stored, or gets the size if reading.
 ********************************************************************/

bool smb_io_hdrbuf_pre(const char *desc, BUFHDR *hdr, prs_struct *ps, int depth, uint32 *offset)
{
	(*offset) = prs_offset(ps);
	if (ps->io) {

		/* reading. */

		if(!smb_io_hdrbuf(desc, hdr, ps, depth))
			return False;

	} else {

		/* writing. */

		if(!prs_set_offset(ps, prs_offset(ps) + (sizeof(uint32) * 2)))
			return False;
	}

	return True;
}

/*******************************************************************
 smb_io_hdrbuf wrapper. Call this and it retrospectively stores the size.
 Does nothing on reading, as that is already handled by ...._pre()
 ********************************************************************/

bool smb_io_hdrbuf_post(const char *desc, BUFHDR *hdr, prs_struct *ps, int depth, 
				uint32 ptr_hdrbuf, uint32 max_len, uint32 len)
{
	if (!ps->io) {
		/* writing: go back and do a retrospective job.  i hate this */

		uint32 old_offset = prs_offset(ps);

		init_buf_hdr(hdr, max_len, len);
		if(!prs_set_offset(ps, ptr_hdrbuf))
			return False;
		if(!smb_io_hdrbuf(desc, hdr, ps, depth))
			return False;

		if(!prs_set_offset(ps, old_offset))
			return False;
	}

	return True;
}

/*******************************************************************
 Reads or writes a BUFHDR structure.
********************************************************************/

bool smb_io_hdrbuf(const char *desc, BUFHDR *hdr, prs_struct *ps, int depth)
{
	if (hdr == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_hdrbuf");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("buf_max_len", ps, depth, &hdr->buf_max_len))
		return False;
	if(!prs_uint32("buf_len    ", ps, depth, &hdr->buf_len))
		return False;

	return True;
}

/*******************************************************************
 Inits a UNISTR structure.
********************************************************************/

void init_unistr(UNISTR *str, const char *buf)
{
	size_t len;

	if (buf == NULL) {
		str->buffer = NULL;
		return;
	}

	len = rpcstr_push_talloc(talloc_tos(), &str->buffer, buf);
	if (len == (size_t)-1) {
		str->buffer = NULL;
	}
}

/*******************************************************************
reads or writes a UNISTR structure.
XXXX NOTE: UNISTR structures NEED to be null-terminated.
********************************************************************/

bool smb_io_unistr(const char *desc, UNISTR *uni, prs_struct *ps, int depth)
{
	if (uni == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_unistr");
	depth++;

	if(!prs_unistr("unistr", ps, depth, uni))
		return False;

	return True;
}

/*******************************************************************
 Allocate the RPC_DATA_BLOB memory.
********************************************************************/

static void create_rpc_blob(RPC_DATA_BLOB *str, size_t len)
{
	if (len) {
		str->buffer = (uint8 *)TALLOC_ZERO(talloc_tos(), len);
		if (str->buffer == NULL)
			smb_panic("create_rpc_blob: talloc fail");
		str->buf_len = len;
	} else {
		str->buffer = NULL;
		str->buf_len = 0;
	}
}

/*******************************************************************
 Inits a RPC_DATA_BLOB structure from a uint32
********************************************************************/

void init_rpc_blob_uint32(RPC_DATA_BLOB *str, uint32 val)
{
	ZERO_STRUCTP(str);

	/* set up string lengths. */
	create_rpc_blob(str, sizeof(uint32));
	SIVAL(str->buffer, 0, val);
}

/*******************************************************************
 Inits a RPC_DATA_BLOB structure.
********************************************************************/

void init_rpc_blob_str(RPC_DATA_BLOB *str, const char *buf, int len)
{
	ZERO_STRUCTP(str);

	/* set up string lengths. */
	if (len) {
		create_rpc_blob(str, len*2);
		rpcstr_push(str->buffer, buf, (size_t)str->buf_len, STR_TERMINATE);
	}
}

/*******************************************************************
 Inits a RPC_DATA_BLOB structure from a hex string.
********************************************************************/

void init_rpc_blob_hex(RPC_DATA_BLOB *str, const char *buf)
{
	ZERO_STRUCTP(str);
	if (buf && *buf) {
		size_t len = strlen(buf);
		create_rpc_blob(str, len);
		str->buf_len = strhex_to_str((char *)str->buffer, str->buf_len,
				buf, len);
	}
}

/*******************************************************************
 Inits a RPC_DATA_BLOB structure.
********************************************************************/

void init_rpc_blob_bytes(RPC_DATA_BLOB *str, uint8 *buf, size_t len)
{
	ZERO_STRUCTP(str);

	/* max buffer size (allocated size) */
	if (buf != NULL && len) {
		create_rpc_blob(str, len);
		memcpy(str->buffer, buf, len);
	}
	str->buf_len = len;
}

/*******************************************************************
reads or writes a BUFFER5 structure.
the buf_len member tells you how large the buffer is.
********************************************************************/
bool smb_io_buffer5(const char *desc, BUFFER5 *buf5, prs_struct *ps, int depth)
{
	prs_debug(ps, depth, desc, "smb_io_buffer5");
	depth++;

	if (buf5 == NULL) return False;

	if(!prs_align(ps))
		return False;
	if(!prs_uint32("buf_len", ps, depth, &buf5->buf_len))
		return False;

	if(buf5->buf_len) {
		if(!prs_buffer5(True, "buffer" , ps, depth, buf5))
			return False;
	}

	return True;
}

/*******************************************************************
 Inits a REGVAL_BUFFER structure.
********************************************************************/

void init_regval_buffer(REGVAL_BUFFER *str, const uint8 *buf, size_t len)
{
	ZERO_STRUCTP(str);

	/* max buffer size (allocated size) */
	str->buf_max_len = len;
	str->offset = 0;
	str->buf_len = buf != NULL ? len : 0;

	if (buf != NULL) {
		SMB_ASSERT(str->buf_max_len >= str->buf_len);
		str->buffer = (uint16 *)TALLOC_ZERO(talloc_tos(),
						    str->buf_max_len);
		if (str->buffer == NULL)
			smb_panic("init_regval_buffer: talloc fail");
		memcpy(str->buffer, buf, str->buf_len);
	}
}

/*******************************************************************
 Reads or writes a REGVAL_BUFFER structure.
   the uni_max_len member tells you how large the buffer is.
   the uni_str_len member tells you how much of the buffer is really used.
********************************************************************/

bool smb_io_regval_buffer(const char *desc, prs_struct *ps, int depth, REGVAL_BUFFER *buf2)
{

	prs_debug(ps, depth, desc, "smb_io_regval_buffer");
	depth++;

	if(!prs_align(ps))
		return False;
		
	if(!prs_uint32("buf_max_len", ps, depth, &buf2->buf_max_len))
		return False;
	if(!prs_uint32("offset     ", ps, depth, &buf2->offset))
		return False;
	if(!prs_uint32("buf_len    ", ps, depth, &buf2->buf_len))
		return False;

	/* buffer advanced by indicated length of string
	   NOT by searching for null-termination */

	if(!prs_regval_buffer(True, "buffer     ", ps, depth, buf2))
		return False;

	return True;
}

/*******************************************************************
creates a UNISTR2 structure: sets up the buffer, too
********************************************************************/

void init_buf_unistr2(UNISTR2 *str, uint32 *ptr, const char *buf)
{
	if (buf != NULL) {
		*ptr = 1;
		init_unistr2(str, buf, UNI_STR_TERMINATE);
	} else {
		*ptr = 0;
		init_unistr2(str, NULL, UNI_FLAGS_NONE);

	}
}

/*******************************************************************
 Copies a UNISTR2 structure.
********************************************************************/

void copy_unistr2(UNISTR2 *str, const UNISTR2 *from)
{
	if (from->buffer == NULL) {
		ZERO_STRUCTP(str);
		return;
	}

	SMB_ASSERT(from->uni_max_len >= from->uni_str_len);

	str->uni_max_len = from->uni_max_len;
	str->offset      = from->offset;
	str->uni_str_len = from->uni_str_len;

	/* the string buffer is allocated to the maximum size
	   (the the length of the source string) to prevent
	   reallocation of memory. */
	if (str->buffer == NULL) {
		if (str->uni_max_len) {
			str->buffer = (uint16 *)TALLOC_ZERO_ARRAY(talloc_tos(), uint16, str->uni_max_len);
			if ((str->buffer == NULL)) {
				smb_panic("copy_unistr2: talloc fail");
				return;
			}
			/* copy the string */
			memcpy(str->buffer, from->buffer, str->uni_max_len*sizeof(uint16));
		} else {
			str->buffer = NULL;
		}
	}
}

/*******************************************************************
 Creates a STRING2 structure.
********************************************************************/

void init_string2(STRING2 *str, const char *buf, size_t max_len, size_t str_len)
{
	/* set up string lengths. */
	SMB_ASSERT(max_len >= str_len);

	/* Ensure buf is valid if str_len was set. Coverity check. */
	if (str_len && !buf) {
		return;
	}

	str->str_max_len = max_len;
	str->offset = 0;
	str->str_str_len = str_len;

	/* store the string */
	if(str_len != 0) {
		str->buffer = (uint8 *)TALLOC_ZERO(talloc_tos(),
						   str->str_max_len);
		if (str->buffer == NULL)
			smb_panic("init_string2: malloc fail");
		memcpy(str->buffer, buf, str_len);
	}
}

/*******************************************************************
 Reads or writes a STRING2 structure.
 XXXX NOTE: STRING2 structures need NOT be null-terminated.
   the str_str_len member tells you how long the string is;
   the str_max_len member tells you how large the buffer is.
********************************************************************/

bool smb_io_string2(const char *desc, STRING2 *str2, uint32 buffer, prs_struct *ps, int depth)
{
	if (str2 == NULL)
		return False;

	if (buffer) {

		prs_debug(ps, depth, desc, "smb_io_string2");
		depth++;

		if(!prs_align(ps))
			return False;
		
		if(!prs_uint32("str_max_len", ps, depth, &str2->str_max_len))
			return False;
		if(!prs_uint32("offset     ", ps, depth, &str2->offset))
			return False;
		if(!prs_uint32("str_str_len", ps, depth, &str2->str_str_len))
			return False;

		/* buffer advanced by indicated length of string
		   NOT by searching for null-termination */
		if(!prs_string2(True, "buffer     ", ps, depth, str2))
			return False;

	} else {

		prs_debug(ps, depth, desc, "smb_io_string2 - NULL");
		depth++;
		memset((char *)str2, '\0', sizeof(*str2));

	}

	return True;
}

/*******************************************************************
 Inits a UNISTR2 structure.
********************************************************************/

void init_unistr2(UNISTR2 *str, const char *buf, enum unistr2_term_codes flags)
{
	size_t len = 0;
	uint32 num_chars = 0;

	if (buf) {
		/* We always null terminate the copy. */
		len = strlen(buf) + 1;
		if ( flags == UNI_STR_DBLTERMINATE )
			len++;
	}

	if (buf == NULL || len == 0) {
		/* no buffer -- nothing to do */
		str->uni_max_len = 0;
		str->offset = 0;
		str->uni_str_len = 0;

		return;
	}
	

	str->buffer = TALLOC_ZERO_ARRAY(talloc_tos(), uint16, len);
	if (str->buffer == NULL) {
		smb_panic("init_unistr2: malloc fail");
		return;
	}

	/* Ensure len is the length in *bytes* */
	len *= sizeof(uint16);

	/*
	 * The UNISTR2 must be initialized !!!
	 * jfm, 7/7/2001.
	 */
	if (buf) {
		rpcstr_push((char *)str->buffer, buf, len, STR_TERMINATE);
		num_chars = strlen_w(str->buffer);
		if (flags == UNI_STR_TERMINATE || flags == UNI_MAXLEN_TERMINATE) {
			num_chars++;
		}
		if ( flags == UNI_STR_DBLTERMINATE )
			num_chars += 2;
	}

	str->uni_max_len = num_chars;
	str->offset = 0;
	str->uni_str_len = num_chars;
	if ( num_chars && ((flags == UNI_MAXLEN_TERMINATE) || (flags == UNI_BROKEN_NON_NULL)) )
		str->uni_max_len++;
}

/*******************************************************************
 Inits a UNISTR4 structure.
********************************************************************/

void init_unistr4(UNISTR4 *uni4, const char *buf, enum unistr2_term_codes flags)
{
	uni4->string = TALLOC_P( talloc_tos(), UNISTR2 );
	if (!uni4->string) {
		smb_panic("init_unistr4: talloc fail");
		return;
	}
	init_unistr2( uni4->string, buf, flags );

	uni4->length = 2 * (uni4->string->uni_str_len);
	uni4->size   = 2 * (uni4->string->uni_max_len);
}

void init_unistr4_w( TALLOC_CTX *ctx, UNISTR4 *uni4, const smb_ucs2_t *buf )
{
	uni4->string = TALLOC_P( ctx, UNISTR2 );
	if (!uni4->string) {
		smb_panic("init_unistr4_w: talloc fail");
		return;
	}
	init_unistr2_w( ctx, uni4->string, buf );

	uni4->length = 2 * (uni4->string->uni_str_len);
	uni4->size   = 2 * (uni4->string->uni_max_len);
}

/** 
 *  Inits a UNISTR2 structure.
 *  @param  ctx talloc context to allocate string on
 *  @param  str pointer to string to create
 *  @param  buf UCS2 null-terminated buffer to init from
*/

void init_unistr2_w(TALLOC_CTX *ctx, UNISTR2 *str, const smb_ucs2_t *buf)
{
	uint32 len = buf ? strlen_w(buf) : 0;

	ZERO_STRUCTP(str);

	/* set up string lengths. */
	str->uni_max_len = len;
	str->offset = 0;
	str->uni_str_len = len;

	if (len + 1) {
		str->buffer = TALLOC_ZERO_ARRAY(ctx, uint16, len + 1);
		if (str->buffer == NULL) {
			smb_panic("init_unistr2_w: talloc fail");
			return;
		}
	} else {
		str->buffer = NULL;
	}
	
	/*
	 * don't move this test above ! The UNISTR2 must be initialized !!!
	 * jfm, 7/7/2001.
	 */
	if (buf==NULL)
		return;
	
	/* Yes, this is a strncpy( foo, bar, strlen(bar)) - but as
           long as the buffer above is talloc()ed correctly then this
           is the correct thing to do */
	if (len+1) {
		strncpy_w(str->buffer, buf, len + 1);
	}
}

/*******************************************************************
 Inits a UNISTR2 structure from a UNISTR
********************************************************************/

void init_unistr2_from_unistr(TALLOC_CTX *ctx, UNISTR2 *to, const UNISTR *from)
{
	uint32 i;

	/* the destination UNISTR2 should never be NULL.
	   if it is it is a programming error */

	/* if the source UNISTR is NULL, then zero out
	   the destination string and return */
	ZERO_STRUCTP (to);
	if ((from == NULL) || (from->buffer == NULL))
		return;

	/* get the length; UNISTR must be NULL terminated */
	i = 0;
	while ((from->buffer)[i]!='\0')
		i++;
	i++;	/* one more to catch the terminating NULL */
		/* is this necessary -- jerry?  I need to think */

	/* set up string lengths; uni_max_len is set to i+1
           because we need to account for the final NULL termination */
	to->uni_max_len = i;
	to->offset = 0;
	to->uni_str_len = i;

	/* allocate the space and copy the string buffer */
	if (i) {
		to->buffer = TALLOC_ZERO_ARRAY(ctx, uint16, i);
		if (to->buffer == NULL)
			smb_panic("init_unistr2_from_unistr: talloc fail");
		memcpy(to->buffer, from->buffer, i*sizeof(uint16));
	} else {
		to->buffer = NULL;
	}
	return;
}

/*******************************************************************
  Inits a UNISTR2 structure from a DATA_BLOB.
  The length of the data_blob must count the bytes of the buffer.
  Copies the blob data.
********************************************************************/

void init_unistr2_from_datablob(UNISTR2 *str, DATA_BLOB *blob) 
{
	/* Allocs the unistring */
	init_unistr2(str, NULL, UNI_FLAGS_NONE);
	
	/* Sets the values */
	str->uni_str_len = blob->length / sizeof(uint16);
	str->uni_max_len = str->uni_str_len;
	str->offset = 0;
	if (blob->length) {
		str->buffer = (uint16 *) memdup(blob->data, blob->length);
	} else {
		str->buffer = NULL;
	}
	if ((str->buffer == NULL) && (blob->length > 0)) {
		smb_panic("init_unistr2_from_datablob: malloc fail");
	}
}

/*******************************************************************
 UNISTR2* are a little different in that the pointer and the UNISTR2
 are not necessarily read/written back to back.  So we break it up 
 into 2 separate functions.
 See SPOOL_USER_1 in include/rpc_spoolss.h for an example.
********************************************************************/

bool prs_io_unistr2_p(const char *desc, prs_struct *ps, int depth, UNISTR2 **uni2)
{
	uint32 data_p;

	/* caputure the pointer value to stream */

	data_p = *uni2 ? 0xf000baaa : 0;

	if ( !prs_uint32("ptr", ps, depth, &data_p ))
		return False;

	/* we're done if there is no data */

	if ( !data_p )
		return True;

	if (UNMARSHALLING(ps)) {
		if ( !(*uni2 = PRS_ALLOC_MEM(ps, UNISTR2, 1)) )
			return False;
	}

	return True;
}

/*******************************************************************
 now read/write the actual UNISTR2.  Memory for the UNISTR2 (but
 not UNISTR2.buffer) has been allocated previously by prs_unistr2_p()
********************************************************************/

bool prs_io_unistr2(const char *desc, prs_struct *ps, int depth, UNISTR2 *uni2 )
{
	/* just return true if there is no pointer to deal with.
	   the memory must have been previously allocated on unmarshalling
	   by prs_unistr2_p() */

	if ( !uni2 )
		return True;

	/* just pass off to smb_io_unstr2() passing the uni2 address as 
	   the pointer (like you would expect) */

	return smb_io_unistr2( desc, uni2, uni2 ? 1 : 0, ps, depth );
}

/*******************************************************************
 Reads or writes a UNISTR2 structure.
 XXXX NOTE: UNISTR2 structures need NOT be null-terminated.
   the uni_str_len member tells you how long the string is;
   the uni_max_len member tells you how large the buffer is.
********************************************************************/

bool smb_io_unistr2(const char *desc, UNISTR2 *uni2, uint32 buffer, prs_struct *ps, int depth)
{
	if (uni2 == NULL)
		return False;

	if (buffer) {

		prs_debug(ps, depth, desc, "smb_io_unistr2");
		depth++;

		if(!prs_align(ps))
			return False;
		
		if(!prs_uint32("uni_max_len", ps, depth, &uni2->uni_max_len))
			return False;
		if(!prs_uint32("offset     ", ps, depth, &uni2->offset))
			return False;
		if(!prs_uint32("uni_str_len", ps, depth, &uni2->uni_str_len))
			return False;

		/* buffer advanced by indicated length of string
		   NOT by searching for null-termination */
		if(!prs_unistr2(True, "buffer     ", ps, depth, uni2))
			return False;

	} else {

		prs_debug(ps, depth, desc, "smb_io_unistr2 - NULL");
		depth++;
		memset((char *)uni2, '\0', sizeof(*uni2));

	}

	return True;
}

/*******************************************************************
 now read/write UNISTR4
********************************************************************/

bool prs_unistr4(const char *desc, prs_struct *ps, int depth, UNISTR4 *uni4)
{
	void *ptr;
	prs_debug(ps, depth, desc, "prs_unistr4");
	depth++;

	if ( !prs_uint16("length", ps, depth, &uni4->length ))
		return False;
	if ( !prs_uint16("size", ps, depth, &uni4->size ))
		return False;
		
	ptr = uni4->string;

	if ( !prs_pointer( desc, ps, depth, &ptr, sizeof(UNISTR2), (PRS_POINTER_CAST)prs_io_unistr2 ) )
		return False;

	uni4->string = (UNISTR2 *)ptr;
	
	return True;
}

/*******************************************************************
 now read/write UNISTR4 header
********************************************************************/

bool prs_unistr4_hdr(const char *desc, prs_struct *ps, int depth, UNISTR4 *uni4)
{
	prs_debug(ps, depth, desc, "prs_unistr4_hdr");
	depth++;

	if ( !prs_uint16("length", ps, depth, &uni4->length) )
		return False;
	if ( !prs_uint16("size", ps, depth, &uni4->size) )
		return False;
	if ( !prs_io_unistr2_p(desc, ps, depth, &uni4->string) )
		return False;
		
	return True;
}

/*******************************************************************
 now read/write UNISTR4 string
********************************************************************/

bool prs_unistr4_str(const char *desc, prs_struct *ps, int depth, UNISTR4 *uni4)
{
	prs_debug(ps, depth, desc, "prs_unistr4_str");
	depth++;

	if ( !prs_io_unistr2(desc, ps, depth, uni4->string) )
		return False;
		
	return True;
}

/*******************************************************************
 Reads or writes a UNISTR4_ARRAY structure.
********************************************************************/

bool prs_unistr4_array(const char *desc, prs_struct *ps, int depth, UNISTR4_ARRAY *array )
{
	unsigned int i;

	prs_debug(ps, depth, desc, "prs_unistr4_array");
	depth++;

	if(!prs_uint32("count", ps, depth, &array->count))
		return False;

	if (UNMARSHALLING(ps)) {
		if (array->count) {
			if ( !(array->strings = TALLOC_ZERO_ARRAY( talloc_tos(), UNISTR4, array->count)) )
				return False;
		} else {
			array->strings = NULL;
		}
	}
	
	/* write the headers and then the actual string buffer */
	
	for ( i=0; i<array->count; i++ ) {
		if ( !prs_unistr4_hdr( "string", ps, depth, &array->strings[i]) )
			return False;
	}

	for (i=0;i<array->count;i++) {
		if ( !prs_unistr4_str("string", ps, depth, &array->strings[i]) ) 
			return False;
	}
	
	return True;
}

/********************************************************************
  initialise a UNISTR_ARRAY from a char**
********************************************************************/

bool init_unistr4_array( UNISTR4_ARRAY *array, uint32 count, const char **strings )
{
	unsigned int i;

	array->count = count;

	/* allocate memory for the array of UNISTR4 objects */

	if (array->count) {
		if ( !(array->strings = TALLOC_ZERO_ARRAY(talloc_tos(), UNISTR4, count )) )
			return False;
	} else {
		array->strings = NULL;
	}

	for ( i=0; i<count; i++ ) 
		init_unistr4( &array->strings[i], strings[i], UNI_STR_TERMINATE );

	return True;
}

/*******************************************************************
 Inits a DOM_RID structure.
********************************************************************/

void init_dom_rid(DOM_RID *prid, uint32 rid, uint16 type, uint32 idx)
{
	prid->type    = type;
	prid->rid     = rid;
	prid->rid_idx = idx;
}

/*******************************************************************
 Reads or writes a DOM_RID structure.
********************************************************************/

bool smb_io_dom_rid(const char *desc, DOM_RID *rid, prs_struct *ps, int depth)
{
	if (rid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_dom_rid");
	depth++;

	if(!prs_align(ps))
		return False;
   
	if(!prs_uint16("type   ", ps, depth, &rid->type))
		return False;
	if(!prs_align(ps))
		return False;
	if(!prs_uint32("rid    ", ps, depth, &rid->rid))
		return False;
	if(!prs_uint32("rid_idx", ps, depth, &rid->rid_idx))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes a DOM_RID2 structure.
********************************************************************/

bool smb_io_dom_rid2(const char *desc, DOM_RID2 *rid, prs_struct *ps, int depth)
{
	if (rid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_dom_rid2");
	depth++;

	if(!prs_align(ps))
		return False;
   
	if(!prs_uint16("type   ", ps, depth, &rid->type))
		return False;
	if(!prs_align(ps))
		return False;
	if(!prs_uint32("rid    ", ps, depth, &rid->rid))
		return False;
	if(!prs_uint32("rid_idx", ps, depth, &rid->rid_idx))
		return False;
	if(!prs_uint32("unknown", ps, depth, &rid->unknown))
		return False;

	return True;
}


/*******************************************************************
creates a DOM_RID3 structure.
********************************************************************/

void init_dom_rid3(DOM_RID3 *rid3, uint32 rid, uint8 type)
{
    rid3->rid      = rid;
    rid3->type1    = type;
    rid3->ptr_type = 0x1; /* non-zero, basically. */
    rid3->type2    = 0x1;
    rid3->unk      = type;
}

/*******************************************************************
reads or writes a DOM_RID3 structure.
********************************************************************/

bool smb_io_dom_rid3(const char *desc, DOM_RID3 *rid3, prs_struct *ps, int depth)
{
	if (rid3 == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_dom_rid3");
	depth++;

	if(!prs_align(ps))
		return False;

	if(!prs_uint32("rid     ", ps, depth, &rid3->rid))
		return False;
	if(!prs_uint32("type1   ", ps, depth, &rid3->type1))
		return False;
	if(!prs_uint32("ptr_type", ps, depth, &rid3->ptr_type))
		return False;
	if(!prs_uint32("type2   ", ps, depth, &rid3->type2))
		return False;
	if(!prs_uint32("unk     ", ps, depth, &rid3->unk))
		return False;

	return True;
}

/*******************************************************************
 Inits a DOM_RID4 structure.
********************************************************************/

void init_dom_rid4(DOM_RID4 *rid4, uint16 unknown, uint16 attr, uint32 rid)
{
    rid4->unknown = unknown;
    rid4->attr    = attr;
    rid4->rid     = rid;
}

/*******************************************************************
 Inits a DOM_CLNT_SRV structure.
********************************************************************/

void init_clnt_srv(DOM_CLNT_SRV *logcln, const char *logon_srv,
		   const char *comp_name)
{
	DEBUG(5,("init_clnt_srv: %d\n", __LINE__));

	if (logon_srv != NULL) {
		logcln->undoc_buffer = 1;
		init_unistr2(&logcln->uni_logon_srv, logon_srv, UNI_STR_TERMINATE);
	} else {
		logcln->undoc_buffer = 0;
	}

	if (comp_name != NULL) {
		logcln->undoc_buffer2 = 1;
		init_unistr2(&logcln->uni_comp_name, comp_name, UNI_STR_TERMINATE);
	} else {
		logcln->undoc_buffer2 = 0;
	}
}

/*******************************************************************
 Inits or writes a DOM_CLNT_SRV structure.
********************************************************************/

bool smb_io_clnt_srv(const char *desc, DOM_CLNT_SRV *logcln, prs_struct *ps, int depth)
{
	if (logcln == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_clnt_srv");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("undoc_buffer ", ps, depth, &logcln->undoc_buffer))
		return False;

	if (logcln->undoc_buffer != 0) {
		if(!smb_io_unistr2("unistr2", &logcln->uni_logon_srv, logcln->undoc_buffer, ps, depth))
			return False;
	}

	if(!prs_align(ps))
		return False;

	if(!prs_uint32("undoc_buffer2", ps, depth, &logcln->undoc_buffer2))
		return False;

	if (logcln->undoc_buffer2 != 0) {
		if(!smb_io_unistr2("unistr2", &logcln->uni_comp_name, logcln->undoc_buffer2, ps, depth))
			return False;
	}

	return True;
}

/*******************************************************************
 Inits a DOM_LOG_INFO structure.
********************************************************************/

void init_log_info(DOM_LOG_INFO *loginfo, const char *logon_srv, const char *acct_name,
		uint16 sec_chan, const char *comp_name)
{
	DEBUG(5,("make_log_info %d\n", __LINE__));

	loginfo->undoc_buffer = 1;

	init_unistr2(&loginfo->uni_logon_srv, logon_srv, UNI_STR_TERMINATE);
	init_unistr2(&loginfo->uni_acct_name, acct_name, UNI_STR_TERMINATE);

	loginfo->sec_chan = sec_chan;

	init_unistr2(&loginfo->uni_comp_name, comp_name, UNI_STR_TERMINATE);
}

/*******************************************************************
 Reads or writes a DOM_LOG_INFO structure.
********************************************************************/

bool smb_io_log_info(const char *desc, DOM_LOG_INFO *loginfo, prs_struct *ps, int depth)
{
	if (loginfo == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_log_info");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("undoc_buffer", ps, depth, &loginfo->undoc_buffer))
		return False;

	if(!smb_io_unistr2("unistr2", &loginfo->uni_logon_srv, True, ps, depth))
		return False;
	if(!smb_io_unistr2("unistr2", &loginfo->uni_acct_name, True, ps, depth))
		return False;

	if(!prs_uint16("sec_chan", ps, depth, &loginfo->sec_chan))
		return False;

	if(!smb_io_unistr2("unistr2", &loginfo->uni_comp_name, True, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes a DOM_CHAL structure.
********************************************************************/

bool smb_io_chal(const char *desc, DOM_CHAL *chal, prs_struct *ps, int depth)
{
	if (chal == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_chal");
	depth++;
	
	if(!prs_uint8s (False, "data", ps, depth, chal->data, 8))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes a DOM_CRED structure.
********************************************************************/

bool smb_io_cred(const char *desc,  DOM_CRED *cred, prs_struct *ps, int depth)
{
	if (cred == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_cred");
	depth++;

	if(!prs_align(ps))
		return False;

	if(!smb_io_chal ("", &cred->challenge, ps, depth))
		return False;

	if(!smb_io_utime("", &cred->timestamp, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Inits a DOM_CLNT_INFO2 structure.
********************************************************************/

void init_clnt_info2(DOM_CLNT_INFO2 *clnt,
				const char *logon_srv, const char *comp_name,
				const DOM_CRED *clnt_cred)
{
	DEBUG(5,("make_clnt_info: %d\n", __LINE__));

	init_clnt_srv(&clnt->login, logon_srv, comp_name);

	if (clnt_cred != NULL) {
		clnt->ptr_cred = 1;
		memcpy(&clnt->cred, clnt_cred, sizeof(clnt->cred));
	} else {
		clnt->ptr_cred = 0;
	}
}

/*******************************************************************
 Reads or writes a DOM_CLNT_INFO2 structure.
********************************************************************/

bool smb_io_clnt_info2(const char *desc, DOM_CLNT_INFO2 *clnt, prs_struct *ps, int depth)
{
	if (clnt == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_clnt_info2");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!smb_io_clnt_srv("", &clnt->login, ps, depth))
		return False;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("ptr_cred", ps, depth, &clnt->ptr_cred))
		return False;
	if(!smb_io_cred("", &clnt->cred, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Inits a DOM_CLNT_INFO structure.
********************************************************************/

void init_clnt_info(DOM_CLNT_INFO *clnt,
		const char *logon_srv, const char *acct_name,
		uint16 sec_chan, const char *comp_name,
		const DOM_CRED *cred)
{
	DEBUG(5,("make_clnt_info\n"));

	init_log_info(&clnt->login, logon_srv, acct_name, sec_chan, comp_name);
	memcpy(&clnt->cred, cred, sizeof(clnt->cred));
}

/*******************************************************************
 Reads or writes a DOM_CLNT_INFO structure.
********************************************************************/

bool smb_io_clnt_info(const char *desc,  DOM_CLNT_INFO *clnt, prs_struct *ps, int depth)
{
	if (clnt == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_clnt_info");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!smb_io_log_info("", &clnt->login, ps, depth))
		return False;
	if(!smb_io_cred("", &clnt->cred, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Inits a DOM_LOGON_ID structure.
********************************************************************/

void init_logon_id(DOM_LOGON_ID *logonid, uint32 log_id_low, uint32 log_id_high)
{
	DEBUG(5,("make_logon_id: %d\n", __LINE__));

	logonid->low  = log_id_low;
	logonid->high = log_id_high;
}

/*******************************************************************
 Reads or writes a DOM_LOGON_ID structure.
********************************************************************/

bool smb_io_logon_id(const char *desc, DOM_LOGON_ID *logonid, prs_struct *ps, int depth)
{
	if (logonid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_logon_id");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("low ", ps, depth, &logonid->low ))
		return False;
	if(!prs_uint32("high", ps, depth, &logonid->high))
		return False;

	return True;
}

/*******************************************************************
 Inits an OWF_INFO structure.
********************************************************************/

void init_owf_info(OWF_INFO *hash, const uint8 data[16])
{
	DEBUG(5,("init_owf_info: %d\n", __LINE__));
	
	if (data != NULL)
		memcpy(hash->data, data, sizeof(hash->data));
	else
		memset((char *)hash->data, '\0', sizeof(hash->data));
}

/*******************************************************************
 Reads or writes an OWF_INFO structure.
********************************************************************/

bool smb_io_owf_info(const char *desc, OWF_INFO *hash, prs_struct *ps, int depth)
{
	if (hash == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_owf_info");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint8s (False, "data", ps, depth, hash->data, 16))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes a DOM_GID structure.
********************************************************************/

bool smb_io_gid(const char *desc,  DOM_GID *gid, prs_struct *ps, int depth)
{
	if (gid == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_gid");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("g_rid", ps, depth, &gid->g_rid))
		return False;
	if(!prs_uint32("attr ", ps, depth, &gid->attr))
		return False;

	return True;
}

/*******************************************************************
 Reads or writes an POLICY_HND structure.
********************************************************************/

bool smb_io_pol_hnd(const char *desc, POLICY_HND *pol, prs_struct *ps, int depth)
{
	if (pol == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_pol_hnd");
	depth++;

	if(!prs_align(ps))
		return False;

	if(UNMARSHALLING(ps))
		ZERO_STRUCTP(pol);
	
	if (!prs_uint32("handle_type", ps, depth, &pol->handle_type))
		return False;
	if (!smb_io_uuid("uuid", (struct GUID*)&pol->uuid, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Create a UNISTR3.
********************************************************************/

void init_unistr3(UNISTR3 *str, const char *buf)
{
	if (buf == NULL) {
		str->uni_str_len=0;
		str->str.buffer = NULL;
		return;
	}

	str->uni_str_len = strlen(buf) + 1;

	if (str->uni_str_len) {
		str->str.buffer = TALLOC_ZERO_ARRAY(talloc_tos(), uint16, str->uni_str_len);
		if (str->str.buffer == NULL)
			smb_panic("init_unistr3: malloc fail");

		rpcstr_push((char *)str->str.buffer, buf, str->uni_str_len * sizeof(uint16), STR_TERMINATE);
	} else {
		str->str.buffer = NULL;
	}
}

/*******************************************************************
 Reads or writes a UNISTR3 structure.
********************************************************************/

bool smb_io_unistr3(const char *desc, UNISTR3 *name, prs_struct *ps, int depth)
{
	if (name == NULL)
		return False;

	prs_debug(ps, depth, desc, "smb_io_unistr3");
	depth++;

	if(!prs_align(ps))
		return False;
	
	if(!prs_uint32("uni_str_len", ps, depth, &name->uni_str_len))
		return False;
		
	/* we're done if there is no string */
	
	if ( name->uni_str_len == 0 )
		return True;

	/* don't know if len is specified by uni_str_len member... */
	/* assume unicode string is unicode-null-terminated, instead */

	if(!prs_unistr3(True, "unistr", name, ps, depth))
		return False;

	return True;
}

/*******************************************************************
 Stream a uint64_struct
 ********************************************************************/
bool prs_uint64(const char *name, prs_struct *ps, int depth, uint64 *data64)
{
	if (UNMARSHALLING(ps)) {
		uint32 high, low;

		if (!prs_uint32(name, ps, depth+1, &low))
			return False;

		if (!prs_uint32(name, ps, depth+1, &high))
			return False;

		*data64 = ((uint64_t)high << 32) + low;

		return True;
	} else {
		uint32 high = (*data64) >> 32, low = (*data64) & 0xFFFFFFFF;
		return prs_uint32(name, ps, depth+1, &low) && 
			   prs_uint32(name, ps, depth+1, &high);
	}
}

/*******************************************************************
reads or writes a BUFHDR2 structure.
********************************************************************/
bool smb_io_bufhdr2(const char *desc, BUFHDR2 *hdr, prs_struct *ps, int depth)
{
	prs_debug(ps, depth, desc, "smb_io_bufhdr2");
	depth++;

	if (!prs_align(ps))
		return False;
	if (!prs_uint32("info_level", ps, depth, &(hdr->info_level)))
		return False;
	if (!prs_uint32("length    ", ps, depth, &(hdr->length    )))
		return False;
	if (!prs_uint32("buffer    ", ps, depth, &(hdr->buffer    )))
		return False;

	return True;
}

/*******************************************************************
reads or writes a BUFHDR4 structure.
********************************************************************/
bool smb_io_bufhdr4(const char *desc, BUFHDR4 *hdr, prs_struct *ps, int depth)
{
	prs_debug(ps, depth, desc, "smb_io_bufhdr4");
	depth++;

	if (!prs_align(ps))
		return False;
	if (!prs_uint32("size", ps, depth, &hdr->size))
		return False;
	if (!prs_uint32("buffer", ps, depth, &hdr->buffer))
		return False;

	return True;
}

/*******************************************************************
reads or writes a RPC_DATA_BLOB structure.
********************************************************************/

bool smb_io_rpc_blob(const char *desc, RPC_DATA_BLOB *blob, prs_struct *ps, int depth)
{
	prs_debug(ps, depth, desc, "smb_io_rpc_blob");
	depth++;

	if (!prs_align(ps))
		return False;
	if ( !prs_uint32("buf_len", ps, depth, &blob->buf_len) )
		return False;

	if ( blob->buf_len == 0 )
		return True;

	if (UNMARSHALLING(ps)) {
		blob->buffer = PRS_ALLOC_MEM(ps, uint8, blob->buf_len);
		if (!blob->buffer) {
			return False;
		}
	}

	if ( !prs_uint8s(True, "buffer", ps, depth, blob->buffer, blob->buf_len) )
		return False;

	return True;
}

/*******************************************************************
creates a UNIHDR structure.
********************************************************************/

bool make_uni_hdr(UNIHDR *hdr, int len)
{
	if (hdr == NULL)
	{
		return False;
	}
	hdr->uni_str_len = 2 * len;
	hdr->uni_max_len = 2 * len;
	hdr->buffer      = len != 0 ? 1 : 0;

	return True;
}

/*******************************************************************
creates a BUFHDR2 structure.
********************************************************************/
bool make_bufhdr2(BUFHDR2 *hdr, uint32 info_level, uint32 length, uint32 buffer)
{
	hdr->info_level = info_level;
	hdr->length     = length;
	hdr->buffer     = buffer;

	return True;
}

/*******************************************************************
return the length of a UNISTR string.
********************************************************************/  

uint32 str_len_uni(UNISTR *source)
{
 	uint32 i=0;

	if (!source->buffer)
		return 0;

	while (source->buffer[i])
		i++;

	return i;
}

/*******************************************************************
 Verifies policy handle
********************************************************************/

bool policy_handle_is_valid(const POLICY_HND *hnd)
{
	POLICY_HND zero_pol;

	ZERO_STRUCT(zero_pol);
	return ((memcmp(&zero_pol, hnd, sizeof(POLICY_HND)) == 0) ? false : true );
}