2 Unix SMB/CIFS implementation.
3 simple kerberos5/SPNEGO routines
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
6 Copyright (C) Andrew Bartlett 2002-2003
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 this is a tiny msrpc packet generator. I am only using this to
27 avoid tying this code to a particular varient of our rpc code. This
28 generator is not general enough for all our rpc needs, its just
29 enough for the spnego/ntlmssp code
31 format specifiers are:
33 U = unicode string (input is unix string)
34 a = address (input is char *unix_string)
35 (1 byte type, 1 byte length, unicode/ASCII string, all inline)
36 A = ASCII string (input is unix string)
37 B = data blob (pointer + length)
38 b = data blob in header (pointer + length)
41 C = constant ascii string
43 BOOL msrpc_gen(DATA_BLOB *blob,
44 const char *format, ...)
50 int head_size=0, data_size=0;
51 int head_ofs, data_ofs;
53 /* first scan the format to work out the header and body size */
55 for (i=0; format[i]; i++) {
58 s = va_arg(ap, char *);
60 data_size += str_charnum(s) * 2;
63 s = va_arg(ap, char *);
65 data_size += str_ascii_charnum(s);
69 s = va_arg(ap, char *);
70 data_size += (str_charnum(s) * 2) + 4;
73 b = va_arg(ap, uint8 *);
75 data_size += va_arg(ap, int);
78 b = va_arg(ap, uint8 *);
79 head_size += va_arg(ap, int);
86 s = va_arg(ap, char *);
87 head_size += str_charnum(s) + 1;
93 /* allocate the space, then scan the format again to fill in the values */
94 *blob = data_blob(NULL, head_size + data_size);
100 for (i=0; format[i]; i++) {
103 s = va_arg(ap, char *);
105 SSVAL(blob->data, head_ofs, n*2); head_ofs += 2;
106 SSVAL(blob->data, head_ofs, n*2); head_ofs += 2;
107 SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
108 push_string(NULL, blob->data+data_ofs, s, n*2, STR_UNICODE|STR_NOALIGN);
112 s = va_arg(ap, char *);
113 n = str_ascii_charnum(s);
114 SSVAL(blob->data, head_ofs, n); head_ofs += 2;
115 SSVAL(blob->data, head_ofs, n); head_ofs += 2;
116 SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
117 push_string(NULL, blob->data+data_ofs, s, n, STR_ASCII|STR_NOALIGN);
122 SSVAL(blob->data, data_ofs, n); data_ofs += 2;
123 s = va_arg(ap, char *);
125 SSVAL(blob->data, data_ofs, n*2); data_ofs += 2;
127 push_string(NULL, blob->data+data_ofs, s, n*2,
128 STR_UNICODE|STR_NOALIGN);
134 b = va_arg(ap, uint8 *);
136 SSVAL(blob->data, head_ofs, n); head_ofs += 2;
137 SSVAL(blob->data, head_ofs, n); head_ofs += 2;
138 SIVAL(blob->data, head_ofs, data_ofs); head_ofs += 4;
139 if (n && b) /* don't follow null pointers... */
140 memcpy(blob->data+data_ofs, b, n);
145 SIVAL(blob->data, head_ofs, n); head_ofs += 4;
148 b = va_arg(ap, uint8 *);
150 memcpy(blob->data + head_ofs, b, n);
154 s = va_arg(ap, char *);
155 head_ofs += push_string(NULL, blob->data+head_ofs, s, -1,
156 STR_ASCII|STR_TERMINATE);
166 /* a helpful macro to avoid running over the end of our blob */
167 #define NEED_DATA(amount) \
168 if ((head_ofs + amount) > blob->length) { \
173 this is a tiny msrpc packet parser. This the the partner of msrpc_gen
175 format specifiers are:
177 U = unicode string (output is unix string)
180 b = data blob in header
182 C = constant ascii string
185 BOOL msrpc_parse(const DATA_BLOB *blob,
186 const char *format, ...)
198 va_start(ap, format);
199 for (i=0; format[i]; i++) {
203 len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
204 len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
205 ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
207 ps = va_arg(ap, char **);
208 if (len1 == 0 && len2 == 0) {
209 *ps = smb_xstrdup("");
211 /* make sure its in the right format - be strict */
212 if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
216 /* if odd length and unicode */
221 pull_string(NULL, p, blob->data + ptr, sizeof(p),
223 STR_UNICODE|STR_NOALIGN);
224 (*ps) = smb_xstrdup(p);
226 (*ps) = smb_xstrdup("");
232 len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
233 len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
234 ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
236 ps = va_arg(ap, char **);
237 /* make sure its in the right format - be strict */
238 if (len1 == 0 && len2 == 0) {
239 *ps = smb_xstrdup("");
241 if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
246 pull_string(NULL, p, blob->data + ptr, sizeof(p),
248 STR_ASCII|STR_NOALIGN);
249 (*ps) = smb_xstrdup(p);
251 (*ps) = smb_xstrdup("");
257 len1 = SVAL(blob->data, head_ofs); head_ofs += 2;
258 len2 = SVAL(blob->data, head_ofs); head_ofs += 2;
259 ptr = IVAL(blob->data, head_ofs); head_ofs += 4;
261 b = (DATA_BLOB *)va_arg(ap, void *);
262 if (len1 == 0 && len2 == 0) {
263 *b = data_blob(NULL, 0);
265 /* make sure its in the right format - be strict */
266 if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
269 *b = data_blob(blob->data + ptr, len1);
273 b = (DATA_BLOB *)va_arg(ap, void *);
274 len1 = va_arg(ap, unsigned);
275 /* make sure its in the right format - be strict */
277 *b = data_blob(blob->data + head_ofs, len1);
281 v = va_arg(ap, uint32 *);
283 *v = IVAL(blob->data, head_ofs); head_ofs += 4;
286 s = va_arg(ap, char *);
287 head_ofs += pull_string(NULL, p, blob->data+head_ofs, sizeof(p),
288 blob->length - head_ofs,
289 STR_ASCII|STR_TERMINATE);
290 if (strcmp(s, p) != 0) {