summaryrefslogtreecommitdiff
path: root/source4/auth/gensec/ntlmssp_parse.c
diff options
context:
space:
mode:
authorAndrew Bartlett <abartlet@samba.org>2005-03-29 08:24:03 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:11:20 -0500
commit7cabdeb7ec84c7c0b3e9b907e19f4e240b7fc4ca (patch)
tree39fb9a70a787facf6bc48e58dbc821c7e5b2de84 /source4/auth/gensec/ntlmssp_parse.c
parentd15845eb813a2667dfc857d68dc3bf6b262ff496 (diff)
downloadsamba-7cabdeb7ec84c7c0b3e9b907e19f4e240b7fc4ca.tar.gz
samba-7cabdeb7ec84c7c0b3e9b907e19f4e240b7fc4ca.tar.bz2
samba-7cabdeb7ec84c7c0b3e9b907e19f4e240b7fc4ca.zip
r6113: Move GENSEC and the kerberos code out of libcli/auth, and into
auth/gensec and auth/kerberos. This also pulls the kerberos configure code out of libads (which is otherwise dead), and into auth/kerberos/kerberos.m4 Andrew Bartlett (This used to be commit e074d63f3dcf4f84239a10879112ebaf1cfa6c4f)
Diffstat (limited to 'source4/auth/gensec/ntlmssp_parse.c')
-rw-r--r--source4/auth/gensec/ntlmssp_parse.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/source4/auth/gensec/ntlmssp_parse.c b/source4/auth/gensec/ntlmssp_parse.c
new file mode 100644
index 0000000000..42546cb130
--- /dev/null
+++ b/source4/auth/gensec/ntlmssp_parse.c
@@ -0,0 +1,338 @@
+/*
+ Unix SMB/CIFS implementation.
+ simple kerberos5/SPNEGO routines
+ Copyright (C) Andrew Tridgell 2001
+ Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002
+ Copyright (C) Andrew Bartlett 2002-2003
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "pstring.h"
+
+/*
+ this is a tiny msrpc packet generator. I am only using this to
+ avoid tying this code to a particular varient of our rpc code. This
+ generator is not general enough for all our rpc needs, its just
+ enough for the spnego/ntlmssp code
+
+ format specifiers are:
+
+ U = unicode string (input is unix string)
+ a = address (input is char *unix_string)
+ (1 byte type, 1 byte length, unicode/ASCII string, all inline)
+ A = ASCII string (input is unix string)
+ B = data blob (pointer + length)
+ b = data blob in header (pointer + length)
+ D
+ d = word (4 bytes)
+ C = constant ascii string
+ */
+BOOL msrpc_gen(TALLOC_CTX *mem_ctx, DATA_BLOB *blob,
+ const char *format, ...)
+{
+ int i;
+ ssize_t n;
+ va_list ap;
+ char *s;
+ uint8_t *b;
+ int head_size=0, data_size=0;
+ int head_ofs, data_ofs;
+ int *intargs;
+
+ DATA_BLOB *pointers;
+
+ pointers = talloc_array(mem_ctx, DATA_BLOB, strlen(format));
+ intargs = talloc_array(pointers, int, strlen(format));
+
+ /* first scan the format to work out the header and body size */
+ va_start(ap, format);
+ for (i=0; format[i]; i++) {
+ switch (format[i]) {
+ case 'U':
+ s = va_arg(ap, char *);
+ head_size += 8;
+ n = push_ucs2_talloc(pointers, (void **)&pointers[i].data, s);
+ if (n == -1) {
+ return False;
+ }
+ pointers[i].length = n;
+ pointers[i].length -= 2;
+ data_size += pointers[i].length;
+ break;
+ case 'A':
+ s = va_arg(ap, char *);
+ head_size += 8;
+ n = push_ascii_talloc(pointers, (char **)&pointers[i].data, s);
+ if (n == -1) {
+ return False;
+ }
+ pointers[i].length = n;
+ pointers[i].length -= 1;
+ data_size += pointers[i].length;
+ break;
+ case 'a':
+ n = va_arg(ap, int);
+ intargs[i] = n;
+ s = va_arg(ap, char *);
+ n = push_ucs2_talloc(pointers, (void **)&pointers[i].data, s);
+ if (n == -1) {
+ return False;
+ }
+ pointers[i].length = n;
+ pointers[i].length -= 2;
+ data_size += pointers[i].length + 4;
+ break;
+ case 'B':
+ b = va_arg(ap, uint8_t *);
+ head_size += 8;
+ pointers[i].data = b;
+ pointers[i].length = va_arg(ap, int);
+ data_size += pointers[i].length;
+ break;
+ case 'b':
+ b = va_arg(ap, uint8_t *);
+ pointers[i].data = b;
+ pointers[i].length = va_arg(ap, int);
+ head_size += pointers[i].length;
+ break;
+ case 'd':
+ n = va_arg(ap, int);
+ intargs[i] = n;
+ head_size += 4;
+ break;
+ case 'C':
+ s = va_arg(ap, char *);
+ pointers[i].data = (uint8_t *)s;
+ pointers[i].length = strlen(s)+1;
+ head_size += pointers[i].length;
+ break;
+ }
+ }
+ va_end(ap);
+
+ /* allocate the space, then scan the format again to fill in the values */
+ *blob = data_blob_talloc(mem_ctx, 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':
+ case 'A':
+ case 'B':
+ n = pointers[i].length;
+ 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 (pointers[i].data && n) /* don't follow null pointers... */
+ memcpy(blob->data+data_ofs, pointers[i].data, n);
+ data_ofs += n;
+ break;
+ case 'a':
+ n = intargs[i];
+ SSVAL(blob->data, data_ofs, n); data_ofs += 2;
+
+ n = pointers[i].length;
+ SSVAL(blob->data, data_ofs, n); data_ofs += 2;
+ if (n >= 0) {
+ memcpy(blob->data+data_ofs, pointers[i].data, n);
+ }
+ data_ofs += n;
+ break;
+ case 'd':
+ n = intargs[i];
+ SIVAL(blob->data, head_ofs, n);
+ head_ofs += 4;
+ break;
+ case 'b':
+ n = pointers[i].length;
+ memcpy(blob->data + head_ofs, pointers[i].data, n);
+ head_ofs += n;
+ break;
+ case 'C':
+ n = pointers[i].length;
+ memcpy(blob->data + head_ofs, pointers[i].data, n);
+ head_ofs += n;
+ break;
+ }
+ }
+ va_end(ap);
+
+ talloc_free(pointers);
+
+ return True;
+}
+
+
+/* a helpful macro to avoid running over the end of our blob */
+#define NEED_DATA(amount) \
+if ((head_ofs + amount) > blob->length) { \
+ return False; \
+}
+
+/*
+ this is a tiny msrpc packet parser. This the the partner of msrpc_gen
+
+ format specifiers are:
+
+ U = unicode string (output is unix string)
+ A = ascii string
+ B = data blob
+ b = data blob in header
+ d = word (4 bytes)
+ C = constant ascii string
+ */
+
+BOOL msrpc_parse(TALLOC_CTX *mem_ctx, const DATA_BLOB *blob,
+ const char *format, ...)
+{
+ int i;
+ va_list ap;
+ const char **ps, *s;
+ DATA_BLOB *b;
+ size_t head_ofs = 0;
+ uint16_t len1, len2;
+ uint32_t ptr;
+ uint32_t *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 = (const char **)va_arg(ap, char **);
+ if (len1 == 0 && len2 == 0) {
+ *ps = "";
+ } else {
+ /* make sure its in the right format - be strict */
+ if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
+ return False;
+ }
+ if (len1 & 1) {
+ /* if odd length and unicode */
+ return False;
+ }
+ if (blob->data + ptr < (uint8_t *)ptr || blob->data + ptr < blob->data)
+ return False;
+
+ if (0 < len1) {
+ pull_string(p, blob->data + ptr, sizeof(p),
+ len1,
+ STR_UNICODE|STR_NOALIGN);
+ (*ps) = talloc_strdup(mem_ctx, p);
+ if (!(*ps)) {
+ return False;
+ }
+ } else {
+ (*ps) = "";
+ }
+ }
+ 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 = (const char **)va_arg(ap, char **);
+ /* make sure its in the right format - be strict */
+ if (len1 == 0 && len2 == 0) {
+ *ps = "";
+ } else {
+ if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
+ return False;
+ }
+
+ if (blob->data + ptr < (uint8_t *)ptr || blob->data + ptr < blob->data)
+ return False;
+
+ if (0 < len1) {
+ pull_string(p, blob->data + ptr, sizeof(p),
+ len1,
+ STR_ASCII|STR_NOALIGN);
+ (*ps) = talloc_strdup(mem_ctx, p);
+ if (!(*ps)) {
+ return False;
+ }
+ } else {
+ (*ps) = "";
+ }
+ }
+ 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_talloc(mem_ctx, NULL, 0);
+ } else {
+ /* make sure its in the right format - be strict */
+ if ((len1 != len2) || (ptr + len1 < ptr) || (ptr + len1 < len1) || (ptr + len1 > blob->length)) {
+ return False;
+ }
+
+ if (blob->data + ptr < (uint8_t *)ptr || blob->data + ptr < blob->data)
+ return False;
+
+ *b = data_blob_talloc(mem_ctx, blob->data + ptr, len1);
+ }
+ break;
+ case 'b':
+ b = (DATA_BLOB *)va_arg(ap, void *);
+ len1 = va_arg(ap, uint_t);
+ /* make sure its in the right format - be strict */
+ NEED_DATA(len1);
+ if (blob->data + head_ofs < (uint8_t *)head_ofs || blob->data + head_ofs < blob->data)
+ return False;
+
+ *b = data_blob_talloc(mem_ctx, blob->data + head_ofs, len1);
+ head_ofs += len1;
+ break;
+ case 'd':
+ v = va_arg(ap, uint32_t *);
+ NEED_DATA(4);
+ *v = IVAL(blob->data, head_ofs); head_ofs += 4;
+ break;
+ case 'C':
+ s = va_arg(ap, char *);
+
+ if (blob->data + head_ofs < (uint8_t *)head_ofs || blob->data + head_ofs < blob->data)
+ return False;
+
+ head_ofs += pull_string(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;
+}