1 |
/* |
2 |
* Copyright (C) 1998,1999 Nikos Mavroyanopoulos |
3 |
* |
4 |
* This library is free software; you can redistribute it and/or modify it under the terms of the |
5 |
* GNU Library General Public License as published by the Free Software |
6 |
* Foundation; either version 2 of the License, or (at your option) any |
7 |
* 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 |
* Library General Public License for more details. |
13 |
* |
14 |
* You should have received a copy of the GNU Library General Public |
15 |
* License along with this library; if not, write to the |
16 |
* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
17 |
* Boston, MA 02111-1307, USA. |
18 |
*/ |
19 |
|
20 |
/* $Id: mcrypt_extra.c,v 1.13 2001/09/02 14:49:00 nmav Exp $ */ |
21 |
|
22 |
#ifndef LIBDEFS_H |
23 |
#define LIBDEFS_H |
24 |
#include <libdefs.h> |
25 |
#endif |
26 |
#include <bzero.h> |
27 |
#include <xmemory.h> |
28 |
#include <mcrypt_internal.h> |
29 |
|
30 |
|
31 |
int mcrypt_algorithm_module_ok(const char *file, const char *directory); |
32 |
int mcrypt_mode_module_ok(const char *file, const char *directory); |
33 |
|
34 |
void *mcrypt_dlopen(mcrypt_dlhandle *handle, const char *a_directory, const char *m_directory, |
35 |
const char *filename); |
36 |
|
37 |
#ifdef HAVE_READDIR_R |
38 |
# define MAXPATHLEN 256 |
39 |
#endif |
40 |
|
41 |
WIN32DLL_DEFINE char *mcrypt_readdir(DIR * dirstream) |
42 |
{ |
43 |
|
44 |
char *result; |
45 |
struct dirent *ret = NULL; |
46 |
#ifdef HAVE_READDIR_R |
47 |
struct dirent ret2[sizeof(struct dirent)+MAXPATHLEN]; |
48 |
#endif |
49 |
|
50 |
#ifdef DT_REG |
51 |
do { |
52 |
#endif |
53 |
|
54 |
#ifdef HAVE_READDIR_R |
55 |
readdir_r(dirstream, ret2, &ret); |
56 |
#else |
57 |
ret = readdir(dirstream); |
58 |
#endif |
59 |
if (ret==NULL) return NULL; |
60 |
|
61 |
result = calloc(1, strlen(ret->d_name) + 1); |
62 |
if (result == NULL) { |
63 |
return NULL; |
64 |
} |
65 |
strcpy(result, ret->d_name); |
66 |
#ifdef DT_REG |
67 |
} |
68 |
while ((ret->d_type != DT_REG) && (ret->d_type != DT_UNKNOWN) |
69 |
&& (ret != NULL)); |
70 |
#endif |
71 |
|
72 |
return result; |
73 |
|
74 |
} |
75 |
|
76 |
static char* inc_algos[] = { |
77 |
"arcfour", |
78 |
NULL |
79 |
}; |
80 |
|
81 |
static char* inc_modes[] = { |
82 |
"stream", |
83 |
NULL |
84 |
}; |
85 |
|
86 |
extern const mcrypt_preloaded mps[]; |
87 |
|
88 |
WIN32DLL_DEFINE char **mcrypt_list_algorithms(char *libdir, int *size) |
89 |
{ |
90 |
DIR *pdir; |
91 |
char directory[512]; |
92 |
char *dirname; |
93 |
char **filename = NULL, *ptr; |
94 |
int tmpsize, i=0; |
95 |
|
96 |
|
97 |
*size = 0; |
98 |
|
99 |
while( mps[i].name!=0 || mps[i].address!=0) { |
100 |
if (mps[i].name!=NULL && mps[i].address==NULL) { |
101 |
if (mcrypt_algorithm_module_ok( mps[i].name, NULL) > 0) { |
102 |
filename = |
103 |
realloc(filename, |
104 |
(*size + |
105 |
1) * sizeof(char *)); |
106 |
if (filename==NULL) { |
107 |
free(dirname); |
108 |
return NULL; |
109 |
} |
110 |
filename[*size] = |
111 |
calloc(1, tmpsize + 1); |
112 |
if (filename[*size]==NULL) return NULL; |
113 |
strcpy(filename[*size], mps[i].name); |
114 |
(*size)++; |
115 |
} |
116 |
} |
117 |
i++; |
118 |
} |
119 |
|
120 |
if (libdir == NULL) { |
121 |
strcpy(directory, LIBDIR); |
122 |
} else { |
123 |
strcpy(directory, libdir); |
124 |
} |
125 |
|
126 |
pdir = opendir(directory); |
127 |
if (pdir == NULL) { |
128 |
#ifdef DEBUG |
129 |
fprintf(stderr, "Unable to open directory %s.\n", |
130 |
directory); |
131 |
#endif |
132 |
free( filename); |
133 |
return NULL; |
134 |
} |
135 |
|
136 |
for (;;) { |
137 |
dirname = mcrypt_readdir(pdir); |
138 |
if (dirname != NULL) { |
139 |
tmpsize = strlen(dirname); |
140 |
if (tmpsize > 3) { |
141 |
if (mcrypt_algorithm_module_ok |
142 |
(dirname, directory) > 0) { |
143 |
filename = |
144 |
realloc(filename, |
145 |
(*size + |
146 |
1) * sizeof(char *)); |
147 |
if (filename==NULL) { |
148 |
free(dirname); |
149 |
return NULL; |
150 |
} |
151 |
filename[*size] = |
152 |
calloc(1, tmpsize + 1); |
153 |
if (filename[*size]==NULL) return NULL; |
154 |
strcpy(filename[*size], dirname); |
155 |
|
156 |
ptr = |
157 |
strrchr(filename[*size], '.'); |
158 |
if (ptr != NULL) |
159 |
*ptr = '\0'; |
160 |
(*size)++; |
161 |
} |
162 |
} |
163 |
free(dirname); |
164 |
} else { |
165 |
break; |
166 |
} |
167 |
|
168 |
} |
169 |
|
170 |
|
171 |
closedir(pdir); |
172 |
|
173 |
return filename; |
174 |
|
175 |
} |
176 |
|
177 |
WIN32DLL_DEFINE char **mcrypt_list_modes(char *libdir, int *size) |
178 |
{ |
179 |
DIR *pdir; |
180 |
char directory[512]; |
181 |
char *dirname; |
182 |
char **filename = NULL, *ptr; |
183 |
int tmpsize; |
184 |
int i=0; |
185 |
|
186 |
*size = 0; |
187 |
|
188 |
while( mps[i].name!=0 || mps[i].address!=0) { |
189 |
if (mps[i].name!=NULL && mps[i].address==NULL) { |
190 |
if (mcrypt_mode_module_ok( mps[i].name, NULL) > 0) { |
191 |
filename = |
192 |
realloc(filename, |
193 |
(*size + |
194 |
1) * sizeof(char *)); |
195 |
if (filename==NULL) { |
196 |
free(dirname); |
197 |
return NULL; |
198 |
} |
199 |
filename[*size] = |
200 |
calloc(1, tmpsize + 1); |
201 |
if (filename[*size]==NULL) return NULL; |
202 |
strcpy(filename[*size], mps[i].name); |
203 |
(*size)++; |
204 |
} |
205 |
} |
206 |
i++; |
207 |
} |
208 |
|
209 |
if (libdir == NULL) { |
210 |
strcpy(directory, LIBDIR); |
211 |
} else { |
212 |
strcpy(directory, libdir); |
213 |
} |
214 |
|
215 |
pdir = opendir(directory); |
216 |
if (pdir == NULL) { |
217 |
#ifdef DEBUG |
218 |
fprintf(stderr, "Unable to open directory %s.\n", |
219 |
directory); |
220 |
#endif |
221 |
free(filename); |
222 |
return NULL; |
223 |
} |
224 |
|
225 |
for (;;) { |
226 |
|
227 |
dirname = mcrypt_readdir(pdir); |
228 |
if (dirname != NULL) { |
229 |
tmpsize = strlen(dirname); |
230 |
if (tmpsize > 3) { |
231 |
if (mcrypt_mode_module_ok |
232 |
(dirname, directory) > 0) { |
233 |
filename = |
234 |
realloc(filename, |
235 |
(*size + |
236 |
1) * sizeof(char *)); |
237 |
if (filename==NULL) { |
238 |
free(dirname); |
239 |
return NULL; |
240 |
} |
241 |
filename[*size] = |
242 |
calloc(1, tmpsize + 1); |
243 |
if (filename[*size]==NULL) return NULL; |
244 |
|
245 |
strcpy(filename[*size], dirname); |
246 |
ptr = |
247 |
strrchr(filename[*size], '.'); |
248 |
if (ptr != NULL) |
249 |
*ptr = '\0'; |
250 |
(*size)++; |
251 |
} |
252 |
} |
253 |
free(dirname); |
254 |
} else { |
255 |
break; |
256 |
} |
257 |
|
258 |
} |
259 |
|
260 |
closedir(pdir); |
261 |
return filename; |
262 |
} |
263 |
|
264 |
WIN32DLL_DEFINE void mcrypt_free_p(char **p, int size) |
265 |
{ |
266 |
int i; |
267 |
|
268 |
for (i = 0; i < size; i++) { |
269 |
free(p[i]); |
270 |
} |
271 |
free(p); |
272 |
} |
273 |
|
274 |
WIN32DLL_DEFINE |
275 |
int mcrypt_algorithm_module_ok(const char *file, const char *directory) |
276 |
{ |
277 |
word32 ret; |
278 |
mcrypt_dlhandle _handle; |
279 |
void* rr; |
280 |
int (*_version) (void); |
281 |
|
282 |
if (file == NULL && directory == NULL) { |
283 |
return MCRYPT_UNKNOWN_ERROR; |
284 |
} |
285 |
|
286 |
if (lt_dlinit() != 0) { |
287 |
return MCRYPT_UNKNOWN_ERROR; |
288 |
} |
289 |
|
290 |
|
291 |
/* LTDL_SET_PRELOADED_SYMBOLS(); */ |
292 |
|
293 |
rr = mcrypt_dlopen(&_handle, directory, NULL, file); |
294 |
|
295 |
if (!rr) { |
296 |
lt_dlexit(); |
297 |
return MCRYPT_UNKNOWN_ERROR; |
298 |
} |
299 |
|
300 |
|
301 |
_version = mcrypt_dlsym(_handle, "_mcrypt_algorithm_version"); |
302 |
|
303 |
if (_version == NULL) { |
304 |
mcrypt_dlclose(_handle); |
305 |
lt_dlexit(); |
306 |
return MCRYPT_UNKNOWN_ERROR; |
307 |
} |
308 |
|
309 |
ret = _version(); |
310 |
|
311 |
mcrypt_dlclose(_handle); |
312 |
lt_dlexit(); |
313 |
|
314 |
return ret; |
315 |
|
316 |
} |
317 |
|
318 |
WIN32DLL_DEFINE |
319 |
int mcrypt_mode_module_ok(const char *file, const char *directory) |
320 |
{ |
321 |
word32 ret; |
322 |
mcrypt_dlhandle _handle; |
323 |
void* rr; |
324 |
int (*_version) (void); |
325 |
|
326 |
if (file == NULL && directory == NULL) { |
327 |
return MCRYPT_UNKNOWN_ERROR; |
328 |
} |
329 |
|
330 |
if (lt_dlinit() != 0) { |
331 |
return MCRYPT_UNKNOWN_ERROR; |
332 |
} |
333 |
|
334 |
rr = mcrypt_dlopen(&_handle, directory, NULL, file); |
335 |
if (!rr) { |
336 |
lt_dlexit(); |
337 |
return MCRYPT_UNKNOWN_ERROR; |
338 |
} |
339 |
|
340 |
|
341 |
_version = mcrypt_dlsym(_handle, "_mcrypt_mode_version"); |
342 |
|
343 |
if (_version == NULL) { |
344 |
mcrypt_dlclose(_handle); |
345 |
lt_dlexit(); |
346 |
return MCRYPT_UNKNOWN_ERROR; |
347 |
} |
348 |
|
349 |
ret = _version(); |
350 |
|
351 |
mcrypt_dlclose(_handle); |
352 |
lt_dlexit(); |
353 |
|
354 |
return ret; |
355 |
|
356 |
} |
357 |
|
358 |
/* Taken from libgcrypt */ |
359 |
|
360 |
static const char* |
361 |
parse_version_number( const char *s, int *number ) |
362 |
{ |
363 |
int val = 0; |
364 |
|
365 |
if( *s == '0' && isdigit(s[1]) ) |
366 |
return NULL; /* leading zeros are not allowed */ |
367 |
for ( ; isdigit(*s); s++ ) { |
368 |
val *= 10; |
369 |
val += *s - '0'; |
370 |
} |
371 |
*number = val; |
372 |
return val < 0? NULL : s; |
373 |
} |
374 |
|
375 |
|
376 |
static const char * |
377 |
parse_version_string( const char *s, int *major, int *minor, int *micro ) |
378 |
{ |
379 |
s = parse_version_number( s, major ); |
380 |
if( !s || *s != '.' ) |
381 |
return NULL; |
382 |
s++; |
383 |
s = parse_version_number( s, minor ); |
384 |
if( !s || *s != '.' ) |
385 |
return NULL; |
386 |
s++; |
387 |
s = parse_version_number( s, micro ); |
388 |
if( !s ) |
389 |
return NULL; |
390 |
return s; /* patchlevel */ |
391 |
} |
392 |
|
393 |
/**************** |
394 |
* Check that the the version of the library is at minimum the requested one |
395 |
* and return the version string; return NULL if the condition is not |
396 |
* satisfied. If a NULL is passed to this function, no check is done, |
397 |
* but the version string is simply returned. |
398 |
*/ |
399 |
const char * |
400 |
mcrypt_check_version( const char *req_version ) |
401 |
{ |
402 |
const char *ver = VERSION; |
403 |
int my_major, my_minor, my_micro; |
404 |
int rq_major, rq_minor, rq_micro; |
405 |
const char *my_plvl, *rq_plvl; |
406 |
|
407 |
if ( !req_version ) |
408 |
return ver; |
409 |
|
410 |
my_plvl = parse_version_string( ver, &my_major, &my_minor, &my_micro ); |
411 |
if ( !my_plvl ) |
412 |
return NULL; /* very strange our own version is bogus */ |
413 |
rq_plvl = parse_version_string( req_version, &rq_major, &rq_minor, |
414 |
&rq_micro ); |
415 |
if ( !rq_plvl ) |
416 |
return NULL; /* req version string is invalid */ |
417 |
|
418 |
if ( my_major > rq_major |
419 |
|| (my_major == rq_major && my_minor > rq_minor) |
420 |
|| (my_major == rq_major && my_minor == rq_minor |
421 |
&& my_micro > rq_micro) |
422 |
|| (my_major == rq_major && my_minor == rq_minor |
423 |
&& my_micro == rq_micro |
424 |
&& strcmp( my_plvl, rq_plvl ) >= 0) ) { |
425 |
return ver; |
426 |
} |
427 |
return NULL; |
428 |
} |
429 |
|