source: trunk/src/secur32/dispatcher.c

Last change on this file was 21364, checked in by vladest, 16 years ago
  • Added SSP DLLs loader. Still under development. Do not use in working configurations
File size: 8.8 KB
Line 
1/*
2 * Copyright 2005, 2006 Kai Blin
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
17 *
18 * A dispatcher to run ntlm_auth for wine's sspi module.
19 */
20
21#include "config.h"
22#include <stdarg.h>
23#include <stdio.h>
24#ifdef HAVE_UNISTD_H
25#include <unistd.h>
26#endif
27#include <sys/types.h>
28#ifdef HAVE_SYS_WAIT_H
29#include <sys/wait.h>
30#endif
31#include <stdlib.h>
32#include <fcntl.h>
33#include "windef.h"
34#include "winbase.h"
35#include "winerror.h"
36#include "sspi.h"
37#include "secur32_priv.h"
38#include "wine/debug.h"
39
40#define INITIAL_BUFFER_SIZE 200
41
42WINE_DEFAULT_DEBUG_CHANNEL(ntlm);
43
44SECURITY_STATUS fork_helper(PNegoHelper *new_helper, const char *prog,
45 char* const argv[])
46{
47 int pipe_in[2];
48 int pipe_out[2];
49 int i;
50 PNegoHelper helper;
51#if 0
52 TRACE("%s ", debugstr_a(prog));
53 for(i = 0; argv[i] != NULL; ++i)
54 {
55 TRACE("%s ", debugstr_a(argv[i]));
56 }
57 TRACE("\n");
58
59 if( pipe(pipe_in) < 0 )
60 {
61 return SEC_E_INTERNAL_ERROR;
62 }
63 if( pipe(pipe_out) < 0 )
64 {
65 close(pipe_in[0]);
66 close(pipe_in[1]);
67 return SEC_E_INTERNAL_ERROR;
68 }
69 if (!(helper = HeapAlloc(GetProcessHeap(),0, sizeof(NegoHelper))))
70 {
71 close(pipe_in[0]);
72 close(pipe_in[1]);
73 close(pipe_out[0]);
74 close(pipe_out[1]);
75 return SEC_E_INSUFFICIENT_MEMORY;
76 }
77
78 helper->helper_pid = fork();
79
80 if(helper->helper_pid == -1)
81 {
82 close(pipe_in[0]);
83 close(pipe_in[1]);
84 close(pipe_out[0]);
85 close(pipe_out[1]);
86 HeapFree( GetProcessHeap(), 0, helper );
87 return SEC_E_INTERNAL_ERROR;
88 }
89
90 if(helper->helper_pid == 0)
91 {
92 /* We're in the child now */
93 close(0);
94 close(1);
95
96 dup2(pipe_out[0], 0);
97 close(pipe_out[0]);
98 close(pipe_out[1]);
99
100 dup2(pipe_in[1], 1);
101 close(pipe_in[0]);
102 close(pipe_in[1]);
103
104 execvp(prog, argv);
105
106 /* Whoops, we shouldn't get here. Big badaboom.*/
107 write(STDOUT_FILENO, "BH\n", 3);
108 _exit(1);
109 }
110 else
111 {
112 *new_helper = helper;
113 helper->major = helper->minor = helper->micro = -1;
114 helper->com_buf = NULL;
115 helper->com_buf_size = 0;
116 helper->com_buf_offset = 0;
117 helper->session_key = NULL;
118 helper->neg_flags = 0;
119 helper->crypt.ntlm.a4i = NULL;
120 helper->crypt.ntlm2.send_a4i = NULL;
121 helper->crypt.ntlm2.recv_a4i = NULL;
122 helper->crypt.ntlm2.send_sign_key = NULL;
123 helper->crypt.ntlm2.send_seal_key = NULL;
124 helper->crypt.ntlm2.recv_sign_key = NULL;
125 helper->crypt.ntlm2.recv_seal_key = NULL;
126 helper->pipe_in = pipe_in[0];
127 fcntl( pipe_in[0], F_SETFD, 1 );
128 close(pipe_in[1]);
129 helper->pipe_out = pipe_out[1];
130 fcntl( pipe_out[1], F_SETFD, 1 );
131 close(pipe_out[0]);
132 }
133 return SEC_E_OK;
134#else
135 return SEC_E_INTERNAL_ERROR;
136#endif
137}
138
139static SECURITY_STATUS read_line(PNegoHelper helper, int *offset_len)
140{
141 char *newline;
142 int read_size;
143#if 0
144 if(helper->com_buf == NULL)
145 {
146 TRACE("Creating a new buffer for the helper\n");
147 if((helper->com_buf = HeapAlloc(GetProcessHeap(), 0, INITIAL_BUFFER_SIZE)) == NULL)
148 return SEC_E_INSUFFICIENT_MEMORY;
149
150 /* Created a new buffer, size is INITIAL_BUFFER_SIZE, offset is 0 */
151 helper->com_buf_size = INITIAL_BUFFER_SIZE;
152 helper->com_buf_offset = 0;
153 }
154
155 do
156 {
157 TRACE("offset = %d, size = %d\n", helper->com_buf_offset, helper->com_buf_size);
158 if(helper->com_buf_offset + INITIAL_BUFFER_SIZE > helper->com_buf_size)
159 {
160 /* increment buffer size in INITIAL_BUFFER_SIZE steps */
161 char *buf = HeapReAlloc(GetProcessHeap(), 0, helper->com_buf,
162 helper->com_buf_size + INITIAL_BUFFER_SIZE);
163 TRACE("Resizing buffer!\n");
164 if (!buf) return SEC_E_INSUFFICIENT_MEMORY;
165 helper->com_buf_size += INITIAL_BUFFER_SIZE;
166 helper->com_buf = buf;
167 }
168 if((read_size = read(helper->pipe_in, helper->com_buf + helper->com_buf_offset,
169 helper->com_buf_size - helper->com_buf_offset)) <= 0)
170 {
171 return SEC_E_INTERNAL_ERROR;
172 }
173
174 TRACE("read_size = %d, read: %s\n", read_size,
175 debugstr_a(helper->com_buf + helper->com_buf_offset));
176 helper->com_buf_offset += read_size;
177 newline = memchr(helper->com_buf, '\n', helper->com_buf_offset);
178 }while(newline == NULL);
179
180 /* Now, if there's a newline character, and we read more than that newline,
181 * we have to store the offset so we can preserve the additional data.*/
182 if( newline != helper->com_buf + helper->com_buf_offset)
183 {
184 TRACE("offset_len is calculated from %p - %p\n",
185 (helper->com_buf + helper->com_buf_offset), newline+1);
186 /* the length of the offset is the number of chars after the newline */
187 *offset_len = (helper->com_buf + helper->com_buf_offset) - (newline + 1);
188 }
189 else
190 {
191 *offset_len = 0;
192 }
193
194 *newline = '\0';
195#endif
196 return SEC_E_OK;
197}
198
199static SECURITY_STATUS preserve_unused(PNegoHelper helper, int offset_len)
200{
201 TRACE("offset_len = %d\n", offset_len);
202#if 0
203 if(offset_len > 0)
204 {
205 memmove(helper->com_buf, helper->com_buf + helper->com_buf_offset,
206 offset_len);
207 helper->com_buf_offset = offset_len;
208 }
209 else
210 {
211 helper->com_buf_offset = 0;
212 }
213
214 TRACE("helper->com_buf_offset was set to: %d\n", helper->com_buf_offset);
215#endif
216 return SEC_E_OK;
217}
218
219SECURITY_STATUS run_helper(PNegoHelper helper, char *buffer,
220 unsigned int max_buflen, int *buflen)
221{
222 int offset_len;
223 SECURITY_STATUS sec_status = SEC_E_OK;
224
225 TRACE("In helper: sending %s\n", debugstr_a(buffer));
226#if 0
227 /* buffer + '\n' */
228 write(helper->pipe_out, buffer, lstrlenA(buffer));
229 write(helper->pipe_out, "\n", 1);
230
231 if((sec_status = read_line(helper, &offset_len)) != SEC_E_OK)
232 {
233 return sec_status;
234 }
235
236 TRACE("In helper: received %s\n", debugstr_a(helper->com_buf));
237 *buflen = lstrlenA(helper->com_buf);
238
239 if( *buflen > max_buflen)
240 {
241 ERR("Buffer size too small(%d given, %d required) dropping data!\n",
242 max_buflen, *buflen);
243 return SEC_E_BUFFER_TOO_SMALL;
244 }
245
246 if( *buflen < 2 )
247 {
248 return SEC_E_ILLEGAL_MESSAGE;
249 }
250
251 /* We only get ERR if the input size is too big. On a GENSEC error,
252 * ntlm_auth will return BH */
253 if(strncmp(helper->com_buf, "ERR", 3) == 0)
254 {
255 return SEC_E_INVALID_TOKEN;
256 }
257
258 memcpy(buffer, helper->com_buf, *buflen+1);
259
260 sec_status = preserve_unused(helper, offset_len);
261#endif
262 return sec_status;
263}
264
265void cleanup_helper(PNegoHelper helper)
266{
267
268 TRACE("Killing helper %p\n", helper);
269#if 0
270 if( (helper == NULL) || (helper->helper_pid == 0))
271 return;
272
273 HeapFree(GetProcessHeap(), 0, helper->com_buf);
274
275 /* closing stdin will terminate ntlm_auth */
276 close(helper->pipe_out);
277 close(helper->pipe_in);
278
279 helper->helper_pid = 0;
280 HeapFree(GetProcessHeap(), 0, helper);
281#endif
282}
283
284void check_version(PNegoHelper helper)
285{
286 char temp[80];
287 char *newline;
288 int major = 0, minor = 0, micro = 0, ret;
289
290 TRACE("Checking version of helper\n");
291#if 0
292 if(helper != NULL)
293 {
294 int len = read(helper->pipe_in, temp, sizeof(temp)-1);
295 if (len > 8)
296 {
297 if((newline = memchr(temp, '\n', len)) != NULL)
298 *newline = '\0';
299 else
300 temp[len] = 0;
301
302 TRACE("Exact version is %s\n", debugstr_a(temp));
303 ret = sscanf(temp, "Version %d.%d.%d", &major, &minor, &micro);
304 if(ret != 3)
305 {
306 ERR("Failed to get the helper version.\n");
307 helper->major = helper->minor = helper->micro = -1;
308 }
309 else
310 {
311 TRACE("Version recognized: %d.%d.%d\n", major, minor, micro);
312 helper->major = major;
313 helper->minor = minor;
314 helper->micro = micro;
315 }
316 }
317 }
318#endif
319}
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