2 * Copyright 2005, 2006 Kai Blin
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.
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.
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
18 * A dispatcher to run ntlm_auth for wine's sspi module.
27 #include <sys/types.h>
28 #ifdef HAVE_SYS_WAIT_H
37 #include "secur32_priv.h"
38 #include "wine/debug.h"
40 #define INITIAL_BUFFER_SIZE 200
42 WINE_DEFAULT_DEBUG_CHANNEL(ntlm);
44 SECURITY_STATUS fork_helper(PNegoHelper *new_helper, const char *prog,
52 TRACE("%s ", debugstr_a(prog));
53 for(i = 0; argv[i] != NULL; ++i)
55 TRACE("%s ", debugstr_a(argv[i]));
59 if( pipe(pipe_in) < 0 )
61 return SEC_E_INTERNAL_ERROR;
63 if( pipe(pipe_out) < 0 )
67 return SEC_E_INTERNAL_ERROR;
69 if (!(helper = HeapAlloc(GetProcessHeap(),0, sizeof(NegoHelper))))
75 return SEC_E_INSUFFICIENT_MEMORY;
78 helper->helper_pid = fork();
80 if(helper->helper_pid == -1)
86 HeapFree( GetProcessHeap(), 0, helper );
87 return SEC_E_INTERNAL_ERROR;
90 if(helper->helper_pid == 0)
92 /* We're in the child now */
106 /* Whoops, we shouldn't get here. Big badaboom.*/
107 write(STDOUT_FILENO, "BH\n", 3);
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 );
129 helper->pipe_out = pipe_out[1];
130 fcntl( pipe_out[1], F_SETFD, 1 );
137 static SECURITY_STATUS read_line(PNegoHelper helper, int *offset_len)
142 if(helper->com_buf == NULL)
144 TRACE("Creating a new buffer for the helper\n");
145 if((helper->com_buf = HeapAlloc(GetProcessHeap(), 0, INITIAL_BUFFER_SIZE)) == NULL)
146 return SEC_E_INSUFFICIENT_MEMORY;
148 /* Created a new buffer, size is INITIAL_BUFFER_SIZE, offset is 0 */
149 helper->com_buf_size = INITIAL_BUFFER_SIZE;
150 helper->com_buf_offset = 0;
155 TRACE("offset = %d, size = %d\n", helper->com_buf_offset, helper->com_buf_size);
156 if(helper->com_buf_offset + INITIAL_BUFFER_SIZE > helper->com_buf_size)
158 /* increment buffer size in INITIAL_BUFFER_SIZE steps */
159 char *buf = HeapReAlloc(GetProcessHeap(), 0, helper->com_buf,
160 helper->com_buf_size + INITIAL_BUFFER_SIZE);
161 TRACE("Resizing buffer!\n");
162 if (!buf) return SEC_E_INSUFFICIENT_MEMORY;
163 helper->com_buf_size += INITIAL_BUFFER_SIZE;
164 helper->com_buf = buf;
166 if((read_size = read(helper->pipe_in, helper->com_buf + helper->com_buf_offset,
167 helper->com_buf_size - helper->com_buf_offset)) <= 0)
169 return SEC_E_INTERNAL_ERROR;
172 TRACE("read_size = %d, read: %s\n", read_size,
173 debugstr_a(helper->com_buf + helper->com_buf_offset));
174 helper->com_buf_offset += read_size;
175 newline = memchr(helper->com_buf, '\n', helper->com_buf_offset);
176 }while(newline == NULL);
178 /* Now, if there's a newline character, and we read more than that newline,
179 * we have to store the offset so we can preserve the additional data.*/
180 if( newline != helper->com_buf + helper->com_buf_offset)
182 TRACE("offset_len is calculated from %p - %p\n",
183 (helper->com_buf + helper->com_buf_offset), newline+1);
184 /* the length of the offset is the number of chars after the newline */
185 *offset_len = (helper->com_buf + helper->com_buf_offset) - (newline + 1);
197 static SECURITY_STATUS preserve_unused(PNegoHelper helper, int offset_len)
199 TRACE("offset_len = %d\n", offset_len);
203 memmove(helper->com_buf, helper->com_buf + helper->com_buf_offset,
205 helper->com_buf_offset = offset_len;
209 helper->com_buf_offset = 0;
212 TRACE("helper->com_buf_offset was set to: %d\n", helper->com_buf_offset);
216 SECURITY_STATUS run_helper(PNegoHelper helper, char *buffer,
217 unsigned int max_buflen, int *buflen)
220 SECURITY_STATUS sec_status = SEC_E_OK;
222 TRACE("In helper: sending %s\n", debugstr_a(buffer));
225 write(helper->pipe_out, buffer, lstrlenA(buffer));
226 write(helper->pipe_out, "\n", 1);
228 if((sec_status = read_line(helper, &offset_len)) != SEC_E_OK)
233 TRACE("In helper: received %s\n", debugstr_a(helper->com_buf));
234 *buflen = lstrlenA(helper->com_buf);
236 if( *buflen > max_buflen)
238 ERR("Buffer size too small(%d given, %d required) dropping data!\n",
239 max_buflen, *buflen);
240 return SEC_E_BUFFER_TOO_SMALL;
245 return SEC_E_ILLEGAL_MESSAGE;
248 /* We only get ERR if the input size is too big. On a GENSEC error,
249 * ntlm_auth will return BH */
250 if(strncmp(helper->com_buf, "ERR", 3) == 0)
252 return SEC_E_INVALID_TOKEN;
255 memcpy(buffer, helper->com_buf, *buflen+1);
257 sec_status = preserve_unused(helper, offset_len);
262 void cleanup_helper(PNegoHelper helper)
265 TRACE("Killing helper %p\n", helper);
266 if( (helper == NULL) || (helper->helper_pid == 0))
269 HeapFree(GetProcessHeap(), 0, helper->com_buf);
271 /* closing stdin will terminate ntlm_auth */
272 close(helper->pipe_out);
273 close(helper->pipe_in);
275 waitpid(helper->helper_pid, NULL, 0);
277 helper->helper_pid = 0;
278 HeapFree(GetProcessHeap(), 0, helper);
281 void check_version(PNegoHelper helper)
285 int major = 0, minor = 0, micro = 0, ret;
287 TRACE("Checking version of helper\n");
290 int len = read(helper->pipe_in, temp, sizeof(temp)-1);
293 if((newline = memchr(temp, '\n', len)) != NULL)
298 TRACE("Exact version is %s\n", debugstr_a(temp));
299 ret = sscanf(temp, "Version %d.%d.%d", &major, &minor, µ);
302 ERR("Failed to get the helper version.\n");
303 helper->major = helper->minor = helper->micro = -1;
307 TRACE("Version recognized: %d.%d.%d\n", major, minor, micro);
308 helper->major = major;
309 helper->minor = minor;
310 helper->micro = micro;