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changed the definition of dos_PutUniCode

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the previous definition could result is us overflowing a buffer. The
null termination was always added yet the size returned did not
include the null termination.

the new function takes a BOOL null_terminate, and always returns the
total number of bytes consumed by the string.
(This used to be commit 426c904333)
This commit is contained in:
Andrew Tridgell 2000-03-27 12:38:45 +00:00
parent 6570b48d73
commit 18bc76a0c6
5 changed files with 19 additions and 20 deletions
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2
source3/include/proto.h
View File

@ -477,7 +477,7 @@ char *string_truncate(char *s, int length);
/*The following definitions come from lib/util_unistr.c */
int dos_PutUniCode(char *dst,const char *src, ssize_t len);
int dos_PutUniCode(char *dst,const char *src, ssize_t len, BOOL null_terminate);
void ascii_to_unistr(uint16 *dest, const char *src, int maxlen);
void unistr_to_ascii(char *dest, const uint16 *src, int len);
char *skip_unicode_string(char *buf,int n);

13
source3/lib/util_unistr.c
View File

@ -46,11 +46,13 @@ static uint16 *ucs2_to_unixcp;
the current DOS codepage. len is the length in bytes of the
string pointed to by dst.
the return value is the length of the string *without* the trailing
two bytes of zero
if null_terminate is True then null terminate the packet (adds 2 bytes)
the return value is the length consumed by the string, including the
null termination if applied
********************************************************************/
int dos_PutUniCode(char *dst,const char *src, ssize_t len)
int dos_PutUniCode(char *dst,const char *src, ssize_t len, BOOL null_terminate)
{
int ret = 0;
while (*src && (len > 2)) {
@ -74,7 +76,10 @@ int dos_PutUniCode(char *dst,const char *src, ssize_t len)
else
src++;
}
SSVAL(dst,ret,0);
if (null_terminate) {
SSVAL(dst,ret,0);
ret += 2;
}
return(ret);
}

3
source3/libsmb/namequery.c
View File

@ -759,8 +759,7 @@ BOOL lookup_pdc_name(const char *srcname, const char *domain, struct in_addr *pd
mailslot_name = bufp;
bufp += (strlen(bufp) + 1);
bufp = align2(bufp, buffer);
dos_PutUniCode(bufp, srcname, sizeof(buffer) - (bufp - buffer) - 1);
bufp = skip_unicode_string(bufp, 1);
bufp += dos_PutUniCode(bufp, srcname, sizeof(buffer) - (bufp - buffer) - 1, True);
SIVAL(bufp,0,1);
SSVAL(bufp,4,0xFFFF);
SSVAL(bufp,6,0xFFFF);

13
source3/nmbd/nmbd_processlogon.c
View File

@ -159,11 +159,8 @@ logons are not enabled.\n", inet_ntoa(p->ip) ));
{
q = align2(q, buf);
dos_PutUniCode(q, my_name, sizeof(pstring)); /* PDC name */
q = skip_unicode_string(q, 1);
dos_PutUniCode(q, global_myworkgroup,sizeof(pstring)); /* Domain name*/
q = skip_unicode_string(q, 1);
q += dos_PutUniCode(q, my_name, sizeof(pstring), True); /* PDC name */
q += dos_PutUniCode(q, global_myworkgroup,sizeof(pstring), True); /* Domain name*/
SIVAL(q, 0, ntversion);
SSVAL(q, 4, lmnttoken);
@ -239,12 +236,10 @@ reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
}
q += 2;
dos_PutUniCode(q, reply_name,sizeof(pstring));
q = skip_unicode_string(q, 1);
q += dos_PutUniCode(q, reply_name,sizeof(pstring), True);
unistrcpy(q, uniuser);
q = skip_unicode_string(q, 1); /* User name (workstation trust account) */
dos_PutUniCode(q, lp_workgroup(),sizeof(pstring));
q = skip_unicode_string(q, 1); /* Domain name. */
q += dos_PutUniCode(q, lp_workgroup(),sizeof(pstring), True);
SIVAL(q, 0, ntversion);
q += 4;

8
source3/smbd/trans2.c
View File

@ -1179,7 +1179,7 @@ static int call_trans2qfsinfo(connection_struct *conn,
#endif /* Old code. */
SIVAL(pdata,4,128); /* Max filename component length */
fstype_len = dos_PutUniCode(pdata+12,unix_to_dos(fstype,False),sizeof(pstring)/2);
fstype_len = dos_PutUniCode(pdata+12,unix_to_dos(fstype,False),sizeof(pstring), False);
SIVAL(pdata,8,fstype_len);
data_len = 12 + fstype_len;
SSVAL(outbuf,smb_flg2,SVAL(outbuf,smb_flg2)|FLAGS2_UNICODE_STRINGS);
@ -1209,7 +1209,7 @@ static int call_trans2qfsinfo(connection_struct *conn,
} else {
data_len = 18 + 2*strlen(vname);
SIVAL(pdata,12,strlen(vname)*2);
dos_PutUniCode(pdata+18,unix_to_dos(vname,False),sizeof(pstring)/2);
dos_PutUniCode(pdata+18,unix_to_dos(vname,False),sizeof(pstring), False);
}
DEBUG(5,("call_trans2qfsinfo : SMB_QUERY_FS_VOLUME_INFO namelen = %d, vol = %s\n",
@ -1480,7 +1480,7 @@ static int call_trans2qfilepathinfo(connection_struct *conn,
}
strupper(short_name);
l = strlen(short_name);
dos_PutUniCode(pdata + 4, unix_to_dos(short_name,False),sizeof(pstring)*2);
dos_PutUniCode(pdata + 4, unix_to_dos(short_name,False),sizeof(pstring), False);
data_size = 4 + (2*l);
SIVAL(pdata,0,2*l);
}
@ -1496,7 +1496,7 @@ static int call_trans2qfilepathinfo(connection_struct *conn,
if(strequal(".", fname) && (global_client_caps & CAP_UNICODE)) {
l = l*2;
SSVAL(outbuf,smb_flg2,SVAL(outbuf,smb_flg2)|FLAGS2_UNICODE_STRINGS);
dos_PutUniCode(pdata + 4, unix_to_dos("\\",False),sizeof(pstring)*2);
dos_PutUniCode(pdata + 4, unix_to_dos("\\",False),sizeof(pstring), False);
} else {
pstrcpy(pdata+4,fname);
}