#include "includes.h"
BOOL msrpc_gen(DATA_BLOB *blob,
const char *format, ...)
{
int i, n;
va_list ap;
char *s;
uint8 *b;
int head_size=0, data_size=0;
int head_ofs, data_ofs;
va_start(ap, format);
for (i=0; format[i]; i++) {
switch (format[i]) {
case 'U':
s = va_arg(ap, char *);
head_size += 8;
data_size += str_charnum(s) * 2;
break;
case 'A':
s = va_arg(ap, char *);
head_size += 8;
data_size += str_ascii_charnum(s);
break;
case 'a':
n = va_arg(ap, int);
s = va_arg(ap, char *);
data_size += (str_charnum(s) * 2) + 4;
break;
case 'B':
b = va_arg(ap, uint8 *);
head_size += 8;
data_size += va_arg(ap, int);
break;
case 'b':
b = va_arg(ap, uint8 *);
head_size += va_arg(ap, int);
break;
case 'd':
n = va_arg(ap, int);
head_size += 4;
break;
case 'C':
s = va_arg(ap, char *);
head_size += str_charnum(s) + 1;
break;
}
}
va_end(ap);
*blob = data_blob(NULL, head_size + data_size);
head_ofs = 0;
data_ofs = head_size;
va_start(ap, format);
for (i=0; format[i]; i++) {
switch (format[i]) {
case 'U':
s = va_arg(ap, char *);
n = str_charnum(s);
SSVAL(blob->data, head_ofs, n*2); head_ofs += 2;
SSVAL(blob->data, head_ofs, n*2); head_ofs += 2;
SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
push_string(NULL, blob->data+data_ofs, s, n*2, STR_UNICODE|STR_NOALIGN);
data_ofs += n*2;
break;
case 'A':
s = va_arg(ap, char *);
n = str_ascii_charnum(s);
SSVAL(blob->data, head_ofs, n); head_ofs += 2;
SSVAL(blob->data, head_ofs, n); head_ofs += 2;
SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
push_string(NULL, blob->data+data_ofs, s, n, STR_ASCII|STR_NOALIGN);
data_ofs += n;
break;
case 'a':
n = va_arg(ap, int);
SSVAL(blob->data, data_ofs, n); data_ofs += 2;
s = va_arg(ap, char *);
n = str_charnum(s);
SSVAL(blob->data, data_ofs, n*2); data_ofs += 2;
if (0 < n) {
push_string(NULL, blob->data+data_ofs, s, n*2,
STR_UNICODE|STR_NOALIGN);
}
data_ofs += n*2;
break;
case 'B':
b = va_arg(ap, uint8 *);
n = va_arg(ap, int);
SSVAL(blob->data, head_ofs, n); head_ofs += 2;
SSVAL(blob->data, head_ofs, n); head_ofs += 2;
SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
if (n && b)
memcpy(blob->data+data_ofs, b, n);
data_ofs += n;
break;
case 'd':
n = va_arg(ap, int);
SIVAL(blob->data, head_ofs, n); head_ofs += 4;
break;
case 'b':
b = va_arg(ap, uint8 *);
n = va_arg(ap, int);
memcpy(blob->data + head_ofs, b, n);
head_ofs += n;
break;
case 'C':
s = va_arg(ap, char *);
head_ofs += push_string(NULL, blob->data+head_ofs, s, -1,
STR_ASCII|STR_TERMINATE);
break;
}
}
va_end(ap);
return True;
}
#define NEED_DATA(amount) \
if ((head_ofs + amount) > blob->length) { \
return False; \
}
BOOL msrpc_parse(const DATA_BLOB *blob,
const char *format, ...)
{
int i;
va_list ap;
char **ps, *s;
DATA_BLOB *b;
size_t head_ofs = 0;
uint16 len1, len2;
uint32 ptr;
uint32 *v;
pstring p;
va_start(ap, format);
for (i=0; format[i]; i++) {
switch (format[i]) {
case 'U':
NEED_DATA(8);
len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
ps = va_arg(ap, char **);
if (len1 == 0 && len2 == 0) {
*ps = smb_xstrdup("");
} else {
if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
return False;
}
if (len1 & 1) {
return False;
}
if (0 < len1) {
pull_string(NULL, p, blob->data + ptr, sizeof(p),
len1,
STR_UNICODE|STR_NOALIGN);
(*ps) = smb_xstrdup(p);
} else {
(*ps) = smb_xstrdup("");
}
}
break;
case 'A':
NEED_DATA(8);
len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
ps = va_arg(ap, char **);
if (len1 == 0 && len2 == 0) {
*ps = smb_xstrdup("");
} else {
if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
return False;
}
if (0 < len1) {
pull_string(NULL, p, blob->data + ptr, sizeof(p),
len1,
STR_ASCII|STR_NOALIGN);
(*ps) = smb_xstrdup(p);
} else {
(*ps) = smb_xstrdup("");
}
}
break;
case 'B':
NEED_DATA(8);
len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
b = (DATA_BLOB *)va_arg(ap, void *);
if (len1 == 0 && len2 == 0) {
*b = data_blob(NULL, 0);
} else {
if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
return False;
}
*b = data_blob(blob->data + ptr, len1);
}
break;
case 'b':
b = (DATA_BLOB *)va_arg(ap, void *);
len1 = va_arg(ap, unsigned);
NEED_DATA(len1);
*b = data_blob(blob->data + head_ofs, len1);
head_ofs += len1;
break;
case 'd':
v = va_arg(ap, uint32 *);
NEED_DATA(4);
*v = IVAL(blob->data, head_ofs); head_ofs += 4;
break;
case 'C':
s = va_arg(ap, char *);
head_ofs += pull_string(NULL, p, blob->data+head_ofs, sizeof(p),
blob->length - head_ofs,
STR_ASCII|STR_TERMINATE);
if (strcmp(s, p) != 0) {
return False;
}
break;
}
}
va_end(ap);
return True;
}