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(secur32);
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->password = NULL;
115 helper->com_buf = NULL;
116 helper->com_buf_size = 0;
117 helper->com_buf_offset = 0;
118 helper->session_key = NULL;
119 helper->neg_flags = 0;
120 helper->pipe_in = pipe_in[0];
122 helper->pipe_out = pipe_out[1];
129 static SECURITY_STATUS read_line(PNegoHelper helper, int *offset_len)
134 if(helper->com_buf == NULL)
136 TRACE("Creating a new buffer for the helper\n");
137 if((helper->com_buf = HeapAlloc(GetProcessHeap(), 0, INITIAL_BUFFER_SIZE)) == NULL)
138 return SEC_E_INSUFFICIENT_MEMORY;
140 /* Created a new buffer, size is INITIAL_BUFFER_SIZE, offset is 0 */
141 helper->com_buf_size = INITIAL_BUFFER_SIZE;
142 helper->com_buf_offset = 0;
147 TRACE("offset = %d, size = %d\n", helper->com_buf_offset, helper->com_buf_size);
148 if(helper->com_buf_offset + INITIAL_BUFFER_SIZE > helper->com_buf_size)
150 /* increment buffer size in INITIAL_BUFFER_SIZE steps */
151 char *buf = HeapReAlloc(GetProcessHeap(), 0, helper->com_buf,
152 helper->com_buf_size + INITIAL_BUFFER_SIZE);
153 TRACE("Resizing buffer!\n");
154 if (!buf) return SEC_E_INSUFFICIENT_MEMORY;
155 helper->com_buf_size += INITIAL_BUFFER_SIZE;
156 helper->com_buf = buf;
158 if((read_size = read(helper->pipe_in, helper->com_buf + helper->com_buf_offset,
159 helper->com_buf_size - helper->com_buf_offset)) <= 0)
161 return SEC_E_INTERNAL_ERROR;
164 TRACE("read_size = %d, read: %s\n", read_size,
165 debugstr_a(helper->com_buf + helper->com_buf_offset));
166 helper->com_buf_offset += read_size;
167 newline = memchr(helper->com_buf, '\n', helper->com_buf_offset);
168 }while(newline == NULL);
170 /* Now, if there's a newline character, and we read more than that newline,
171 * we have to store the offset so we can preserve the additional data.*/
172 if( newline != helper->com_buf + helper->com_buf_offset)
174 TRACE("offset_len is calculated from %p - %p\n",
175 (helper->com_buf + helper->com_buf_offset), newline+1);
176 /* the length of the offset is the number of chars after the newline */
177 *offset_len = (helper->com_buf + helper->com_buf_offset) - (newline + 1);
189 static SECURITY_STATUS preserve_unused(PNegoHelper helper, int offset_len)
191 TRACE("offset_len = %d\n", offset_len);
195 memmove(helper->com_buf, helper->com_buf + helper->com_buf_offset,
197 helper->com_buf_offset = offset_len;
201 helper->com_buf_offset = 0;
204 TRACE("helper->com_buf_offset was set to: %d\n", helper->com_buf_offset);
208 SECURITY_STATUS run_helper(PNegoHelper helper, char *buffer,
209 unsigned int max_buflen, int *buflen)
212 SECURITY_STATUS sec_status = SEC_E_OK;
214 TRACE("In helper: sending %s\n", debugstr_a(buffer));
217 write(helper->pipe_out, buffer, lstrlenA(buffer));
218 write(helper->pipe_out, "\n", 1);
220 if((sec_status = read_line(helper, &offset_len)) != SEC_E_OK)
225 TRACE("In helper: received %s\n", debugstr_a(helper->com_buf));
226 *buflen = lstrlenA(helper->com_buf);
228 if( *buflen > max_buflen)
230 ERR("Buffer size too small(%d given, %d required) dropping data!\n",
231 max_buflen, *buflen);
232 return SEC_E_BUFFER_TOO_SMALL;
237 return SEC_E_ILLEGAL_MESSAGE;
240 /* We only get ERR if the input size is too big. On a GENSEC error,
241 * ntlm_auth will return BH */
242 if(strncmp(helper->com_buf, "ERR", 3) == 0)
244 return SEC_E_INVALID_TOKEN;
247 memcpy(buffer, helper->com_buf, *buflen+1);
249 sec_status = preserve_unused(helper, offset_len);
254 void cleanup_helper(PNegoHelper helper)
257 TRACE("Killing helper %p\n", helper);
258 if( (helper == NULL) || (helper->helper_pid == 0))
261 HeapFree(GetProcessHeap(), 0, helper->com_buf);
263 /* closing stdin will terminate ntlm_auth */
264 close(helper->pipe_out);
265 close(helper->pipe_in);
267 waitpid(helper->helper_pid, NULL, 0);
269 helper->helper_pid = 0;
270 HeapFree(GetProcessHeap(), 0, helper);
273 void check_version(PNegoHelper helper)
277 int major = 0, minor = 0, micro = 0, ret;
279 TRACE("Checking version of helper\n");
282 int len = read(helper->pipe_in, temp, sizeof(temp)-1);
285 if((newline = memchr(temp, '\n', len)) != NULL)
290 TRACE("Exact version is %s\n", debugstr_a(temp));
291 ret = sscanf(temp, "Version %d.%d.%d", &major, &minor, µ);
294 ERR("Failed to get the helper version.\n");
295 helper->major = helper->minor = helper->micro = -1;
299 TRACE("Version recognized: %d.%d.%d\n", major, minor, micro);
300 helper->major = major;
301 helper->minor = minor;
302 helper->micro = micro;