Commit | Line | Data |
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1da177e4 LT |
1 | #include <netinet/in.h> |
2 | #ifdef __sun__ | |
3 | #include <inttypes.h> | |
4 | #else | |
5 | #include <stdint.h> | |
6 | #endif | |
7 | #include <ctype.h> | |
8 | #include <errno.h> | |
9 | #include <string.h> | |
fc31c771 | 10 | #include <limits.h> |
1da177e4 LT |
11 | #include "modpost.h" |
12 | ||
13 | /* | |
14 | * Stolen form Cryptographic API. | |
15 | * | |
16 | * MD4 Message Digest Algorithm (RFC1320). | |
17 | * | |
18 | * Implementation derived from Andrew Tridgell and Steve French's | |
19 | * CIFS MD4 implementation, and the cryptoapi implementation | |
20 | * originally based on the public domain implementation written | |
21 | * by Colin Plumb in 1993. | |
22 | * | |
23 | * Copyright (c) Andrew Tridgell 1997-1998. | |
24 | * Modified by Steve French (sfrench@us.ibm.com) 2002 | |
25 | * Copyright (c) Cryptoapi developers. | |
26 | * Copyright (c) 2002 David S. Miller (davem@redhat.com) | |
27 | * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> | |
28 | * | |
29 | * This program is free software; you can redistribute it and/or modify | |
30 | * it under the terms of the GNU General Public License as published by | |
31 | * the Free Software Foundation; either version 2 of the License, or | |
32 | * (at your option) any later version. | |
33 | * | |
34 | */ | |
35 | #define MD4_DIGEST_SIZE 16 | |
36 | #define MD4_HMAC_BLOCK_SIZE 64 | |
37 | #define MD4_BLOCK_WORDS 16 | |
38 | #define MD4_HASH_WORDS 4 | |
39 | ||
40 | struct md4_ctx { | |
41 | uint32_t hash[MD4_HASH_WORDS]; | |
42 | uint32_t block[MD4_BLOCK_WORDS]; | |
43 | uint64_t byte_count; | |
44 | }; | |
45 | ||
46 | static inline uint32_t lshift(uint32_t x, unsigned int s) | |
47 | { | |
48 | x &= 0xFFFFFFFF; | |
49 | return ((x << s) & 0xFFFFFFFF) | (x >> (32 - s)); | |
50 | } | |
51 | ||
52 | static inline uint32_t F(uint32_t x, uint32_t y, uint32_t z) | |
53 | { | |
54 | return (x & y) | ((~x) & z); | |
55 | } | |
56 | ||
57 | static inline uint32_t G(uint32_t x, uint32_t y, uint32_t z) | |
58 | { | |
59 | return (x & y) | (x & z) | (y & z); | |
60 | } | |
61 | ||
62 | static inline uint32_t H(uint32_t x, uint32_t y, uint32_t z) | |
63 | { | |
64 | return x ^ y ^ z; | |
65 | } | |
66 | ||
67 | #define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s)) | |
68 | #define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (uint32_t)0x5A827999,s)) | |
69 | #define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (uint32_t)0x6ED9EBA1,s)) | |
70 | ||
71 | /* XXX: this stuff can be optimized */ | |
72 | static inline void le32_to_cpu_array(uint32_t *buf, unsigned int words) | |
73 | { | |
74 | while (words--) { | |
75 | *buf = ntohl(*buf); | |
76 | buf++; | |
77 | } | |
78 | } | |
79 | ||
80 | static inline void cpu_to_le32_array(uint32_t *buf, unsigned int words) | |
81 | { | |
82 | while (words--) { | |
83 | *buf = htonl(*buf); | |
84 | buf++; | |
85 | } | |
86 | } | |
87 | ||
88 | static void md4_transform(uint32_t *hash, uint32_t const *in) | |
89 | { | |
90 | uint32_t a, b, c, d; | |
91 | ||
92 | a = hash[0]; | |
93 | b = hash[1]; | |
94 | c = hash[2]; | |
95 | d = hash[3]; | |
96 | ||
97 | ROUND1(a, b, c, d, in[0], 3); | |
98 | ROUND1(d, a, b, c, in[1], 7); | |
99 | ROUND1(c, d, a, b, in[2], 11); | |
100 | ROUND1(b, c, d, a, in[3], 19); | |
101 | ROUND1(a, b, c, d, in[4], 3); | |
102 | ROUND1(d, a, b, c, in[5], 7); | |
103 | ROUND1(c, d, a, b, in[6], 11); | |
104 | ROUND1(b, c, d, a, in[7], 19); | |
105 | ROUND1(a, b, c, d, in[8], 3); | |
106 | ROUND1(d, a, b, c, in[9], 7); | |
107 | ROUND1(c, d, a, b, in[10], 11); | |
108 | ROUND1(b, c, d, a, in[11], 19); | |
109 | ROUND1(a, b, c, d, in[12], 3); | |
110 | ROUND1(d, a, b, c, in[13], 7); | |
111 | ROUND1(c, d, a, b, in[14], 11); | |
112 | ROUND1(b, c, d, a, in[15], 19); | |
113 | ||
114 | ROUND2(a, b, c, d,in[ 0], 3); | |
115 | ROUND2(d, a, b, c, in[4], 5); | |
116 | ROUND2(c, d, a, b, in[8], 9); | |
117 | ROUND2(b, c, d, a, in[12], 13); | |
118 | ROUND2(a, b, c, d, in[1], 3); | |
119 | ROUND2(d, a, b, c, in[5], 5); | |
120 | ROUND2(c, d, a, b, in[9], 9); | |
121 | ROUND2(b, c, d, a, in[13], 13); | |
122 | ROUND2(a, b, c, d, in[2], 3); | |
123 | ROUND2(d, a, b, c, in[6], 5); | |
124 | ROUND2(c, d, a, b, in[10], 9); | |
125 | ROUND2(b, c, d, a, in[14], 13); | |
126 | ROUND2(a, b, c, d, in[3], 3); | |
127 | ROUND2(d, a, b, c, in[7], 5); | |
128 | ROUND2(c, d, a, b, in[11], 9); | |
129 | ROUND2(b, c, d, a, in[15], 13); | |
130 | ||
131 | ROUND3(a, b, c, d,in[ 0], 3); | |
132 | ROUND3(d, a, b, c, in[8], 9); | |
133 | ROUND3(c, d, a, b, in[4], 11); | |
134 | ROUND3(b, c, d, a, in[12], 15); | |
135 | ROUND3(a, b, c, d, in[2], 3); | |
136 | ROUND3(d, a, b, c, in[10], 9); | |
137 | ROUND3(c, d, a, b, in[6], 11); | |
138 | ROUND3(b, c, d, a, in[14], 15); | |
139 | ROUND3(a, b, c, d, in[1], 3); | |
140 | ROUND3(d, a, b, c, in[9], 9); | |
141 | ROUND3(c, d, a, b, in[5], 11); | |
142 | ROUND3(b, c, d, a, in[13], 15); | |
143 | ROUND3(a, b, c, d, in[3], 3); | |
144 | ROUND3(d, a, b, c, in[11], 9); | |
145 | ROUND3(c, d, a, b, in[7], 11); | |
146 | ROUND3(b, c, d, a, in[15], 15); | |
147 | ||
148 | hash[0] += a; | |
149 | hash[1] += b; | |
150 | hash[2] += c; | |
151 | hash[3] += d; | |
152 | } | |
153 | ||
154 | static inline void md4_transform_helper(struct md4_ctx *ctx) | |
155 | { | |
156 | le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(uint32_t)); | |
157 | md4_transform(ctx->hash, ctx->block); | |
158 | } | |
159 | ||
160 | static void md4_init(struct md4_ctx *mctx) | |
161 | { | |
162 | mctx->hash[0] = 0x67452301; | |
163 | mctx->hash[1] = 0xefcdab89; | |
164 | mctx->hash[2] = 0x98badcfe; | |
165 | mctx->hash[3] = 0x10325476; | |
166 | mctx->byte_count = 0; | |
167 | } | |
168 | ||
169 | static void md4_update(struct md4_ctx *mctx, | |
170 | const unsigned char *data, unsigned int len) | |
171 | { | |
172 | const uint32_t avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f); | |
173 | ||
174 | mctx->byte_count += len; | |
175 | ||
176 | if (avail > len) { | |
177 | memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), | |
178 | data, len); | |
179 | return; | |
180 | } | |
181 | ||
182 | memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), | |
183 | data, avail); | |
184 | ||
185 | md4_transform_helper(mctx); | |
186 | data += avail; | |
187 | len -= avail; | |
188 | ||
189 | while (len >= sizeof(mctx->block)) { | |
190 | memcpy(mctx->block, data, sizeof(mctx->block)); | |
191 | md4_transform_helper(mctx); | |
192 | data += sizeof(mctx->block); | |
193 | len -= sizeof(mctx->block); | |
194 | } | |
195 | ||
196 | memcpy(mctx->block, data, len); | |
197 | } | |
198 | ||
199 | static void md4_final_ascii(struct md4_ctx *mctx, char *out, unsigned int len) | |
200 | { | |
201 | const unsigned int offset = mctx->byte_count & 0x3f; | |
202 | char *p = (char *)mctx->block + offset; | |
203 | int padding = 56 - (offset + 1); | |
204 | ||
205 | *p++ = 0x80; | |
206 | if (padding < 0) { | |
207 | memset(p, 0x00, padding + sizeof (uint64_t)); | |
208 | md4_transform_helper(mctx); | |
209 | p = (char *)mctx->block; | |
210 | padding = 56; | |
211 | } | |
212 | ||
213 | memset(p, 0, padding); | |
214 | mctx->block[14] = mctx->byte_count << 3; | |
215 | mctx->block[15] = mctx->byte_count >> 29; | |
216 | le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - | |
217 | sizeof(uint64_t)) / sizeof(uint32_t)); | |
218 | md4_transform(mctx->hash, mctx->block); | |
219 | cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(uint32_t)); | |
220 | ||
221 | snprintf(out, len, "%08X%08X%08X%08X", | |
222 | mctx->hash[0], mctx->hash[1], mctx->hash[2], mctx->hash[3]); | |
223 | } | |
224 | ||
225 | static inline void add_char(unsigned char c, struct md4_ctx *md) | |
226 | { | |
227 | md4_update(md, &c, 1); | |
228 | } | |
229 | ||
230 | static int parse_string(const char *file, unsigned long len, | |
231 | struct md4_ctx *md) | |
232 | { | |
233 | unsigned long i; | |
234 | ||
235 | add_char(file[0], md); | |
236 | for (i = 1; i < len; i++) { | |
237 | add_char(file[i], md); | |
238 | if (file[i] == '"' && file[i-1] != '\\') | |
239 | break; | |
240 | } | |
241 | return i; | |
242 | } | |
243 | ||
244 | static int parse_comment(const char *file, unsigned long len) | |
245 | { | |
246 | unsigned long i; | |
247 | ||
248 | for (i = 2; i < len; i++) { | |
249 | if (file[i-1] == '*' && file[i] == '/') | |
250 | break; | |
251 | } | |
252 | return i; | |
253 | } | |
254 | ||
255 | /* FIXME: Handle .s files differently (eg. # starts comments) --RR */ | |
61d9cdf2 | 256 | static int parse_file(const char *fname, struct md4_ctx *md) |
1da177e4 | 257 | { |
61d9cdf2 | 258 | char *file; |
1da177e4 LT |
259 | unsigned long i, len; |
260 | ||
261 | file = grab_file(fname, &len); | |
262 | if (!file) | |
263 | return 0; | |
264 | ||
265 | for (i = 0; i < len; i++) { | |
266 | /* Collapse and ignore \ and CR. */ | |
267 | if (file[i] == '\\' && (i+1 < len) && file[i+1] == '\n') { | |
268 | i++; | |
269 | continue; | |
270 | } | |
271 | ||
272 | /* Ignore whitespace */ | |
273 | if (isspace(file[i])) | |
274 | continue; | |
275 | ||
276 | /* Handle strings as whole units */ | |
277 | if (file[i] == '"') { | |
278 | i += parse_string(file+i, len - i, md); | |
279 | continue; | |
280 | } | |
281 | ||
282 | /* Comments: ignore */ | |
283 | if (file[i] == '/' && file[i+1] == '*') { | |
284 | i += parse_comment(file+i, len - i); | |
285 | continue; | |
286 | } | |
287 | ||
288 | add_char(file[i], md); | |
289 | } | |
290 | release_file(file, len); | |
291 | return 1; | |
292 | } | |
e6e6733e AN |
293 | /* Check whether the file is a static library or not */ |
294 | static int is_static_library(const char *objfile) | |
295 | { | |
296 | int len = strlen(objfile); | |
297 | if (objfile[len - 2] == '.' && objfile[len - 1] == 'a') | |
298 | return 1; | |
299 | else | |
300 | return 0; | |
301 | } | |
1da177e4 | 302 | |
7840fea2 MM |
303 | /* We have dir/file.o. Open dir/.file.o.cmd, look for source_ and deps_ line |
304 | * to figure out source files. */ | |
1da177e4 LT |
305 | static int parse_source_files(const char *objfile, struct md4_ctx *md) |
306 | { | |
307 | char *cmd, *file, *line, *dir; | |
308 | const char *base; | |
309 | unsigned long flen, pos = 0; | |
310 | int dirlen, ret = 0, check_files = 0; | |
311 | ||
312 | cmd = NOFAIL(malloc(strlen(objfile) + sizeof("..cmd"))); | |
313 | ||
314 | base = strrchr(objfile, '/'); | |
315 | if (base) { | |
316 | base++; | |
317 | dirlen = base - objfile; | |
318 | sprintf(cmd, "%.*s.%s.cmd", dirlen, objfile, base); | |
319 | } else { | |
320 | dirlen = 0; | |
321 | sprintf(cmd, ".%s.cmd", objfile); | |
322 | } | |
323 | dir = NOFAIL(malloc(dirlen + 1)); | |
324 | strncpy(dir, objfile, dirlen); | |
325 | dir[dirlen] = '\0'; | |
326 | ||
327 | file = grab_file(cmd, &flen); | |
328 | if (!file) { | |
cb80514d | 329 | warn("could not find %s for %s\n", cmd, objfile); |
1da177e4 LT |
330 | goto out; |
331 | } | |
332 | ||
333 | /* There will be a line like so: | |
334 | deps_drivers/net/dummy.o := \ | |
335 | drivers/net/dummy.c \ | |
336 | $(wildcard include/config/net/fastroute.h) \ | |
1da177e4 LT |
337 | include/linux/module.h \ |
338 | ||
339 | Sum all files in the same dir or subdirs. | |
340 | */ | |
341 | while ((line = get_next_line(&pos, file, flen)) != NULL) { | |
61d9cdf2 | 342 | char* p = line; |
7840fea2 MM |
343 | |
344 | if (strncmp(line, "source_", sizeof("source_")-1) == 0) { | |
345 | p = strrchr(line, ' '); | |
346 | if (!p) { | |
347 | warn("malformed line: %s\n", line); | |
348 | goto out_file; | |
349 | } | |
350 | p++; | |
351 | if (!parse_file(p, md)) { | |
352 | warn("could not open %s: %s\n", | |
353 | p, strerror(errno)); | |
354 | goto out_file; | |
355 | } | |
356 | continue; | |
357 | } | |
1da177e4 LT |
358 | if (strncmp(line, "deps_", sizeof("deps_")-1) == 0) { |
359 | check_files = 1; | |
360 | continue; | |
361 | } | |
362 | if (!check_files) | |
363 | continue; | |
364 | ||
365 | /* Continue until line does not end with '\' */ | |
366 | if ( *(p + strlen(p)-1) != '\\') | |
367 | break; | |
368 | /* Terminate line at first space, to get rid of final ' \' */ | |
369 | while (*p) { | |
370 | if (isspace(*p)) { | |
371 | *p = '\0'; | |
372 | break; | |
373 | } | |
374 | p++; | |
375 | } | |
376 | ||
377 | /* Check if this file is in same dir as objfile */ | |
378 | if ((strstr(line, dir)+strlen(dir)-1) == strrchr(line, '/')) { | |
379 | if (!parse_file(line, md)) { | |
cb80514d SR |
380 | warn("could not open %s: %s\n", |
381 | line, strerror(errno)); | |
1da177e4 LT |
382 | goto out_file; |
383 | } | |
384 | ||
385 | } | |
386 | ||
387 | } | |
388 | ||
389 | /* Everyone parsed OK */ | |
390 | ret = 1; | |
391 | out_file: | |
392 | release_file(file, flen); | |
393 | out: | |
394 | free(dir); | |
395 | free(cmd); | |
396 | return ret; | |
397 | } | |
398 | ||
399 | /* Calc and record src checksum. */ | |
400 | void get_src_version(const char *modname, char sum[], unsigned sumlen) | |
401 | { | |
402 | void *file; | |
403 | unsigned long len; | |
404 | struct md4_ctx md; | |
405 | char *sources, *end, *fname; | |
406 | const char *basename; | |
41370d3b SR |
407 | char filelist[PATH_MAX + 1]; |
408 | char *modverdir = getenv("MODVERDIR"); | |
409 | ||
410 | if (!modverdir) | |
411 | modverdir = "."; | |
1da177e4 LT |
412 | |
413 | /* Source files for module are in .tmp_versions/modname.mod, | |
414 | after the first line. */ | |
415 | if (strrchr(modname, '/')) | |
416 | basename = strrchr(modname, '/') + 1; | |
417 | else | |
418 | basename = modname; | |
849464d1 | 419 | snprintf(filelist, sizeof(filelist), "%s/%.*s.mod", modverdir, |
1da177e4 LT |
420 | (int) strlen(basename) - 2, basename); |
421 | ||
422 | file = grab_file(filelist, &len); | |
4be40e22 SR |
423 | if (!file) |
424 | /* not a module or .mod file missing - ignore */ | |
1da177e4 | 425 | return; |
1da177e4 LT |
426 | |
427 | sources = strchr(file, '\n'); | |
428 | if (!sources) { | |
cb80514d | 429 | warn("malformed versions file for %s\n", modname); |
1da177e4 LT |
430 | goto release; |
431 | } | |
432 | ||
433 | sources++; | |
434 | end = strchr(sources, '\n'); | |
435 | if (!end) { | |
cb80514d | 436 | warn("bad ending versions file for %s\n", modname); |
1da177e4 LT |
437 | goto release; |
438 | } | |
439 | *end = '\0'; | |
440 | ||
441 | md4_init(&md); | |
442 | while ((fname = strsep(&sources, " ")) != NULL) { | |
443 | if (!*fname) | |
444 | continue; | |
e6e6733e AN |
445 | if (!(is_static_library(fname)) && |
446 | !parse_source_files(fname, &md)) | |
1da177e4 LT |
447 | goto release; |
448 | } | |
449 | ||
450 | md4_final_ascii(&md, sum, sumlen); | |
451 | release: | |
452 | release_file(file, len); | |
453 | } | |
454 | ||
455 | static void write_version(const char *filename, const char *sum, | |
456 | unsigned long offset) | |
457 | { | |
458 | int fd; | |
459 | ||
460 | fd = open(filename, O_RDWR); | |
461 | if (fd < 0) { | |
cb80514d | 462 | warn("changing sum in %s failed: %s\n", |
1da177e4 LT |
463 | filename, strerror(errno)); |
464 | return; | |
465 | } | |
466 | ||
467 | if (lseek(fd, offset, SEEK_SET) == (off_t)-1) { | |
cb80514d | 468 | warn("changing sum in %s:%lu failed: %s\n", |
1da177e4 LT |
469 | filename, offset, strerror(errno)); |
470 | goto out; | |
471 | } | |
472 | ||
473 | if (write(fd, sum, strlen(sum)+1) != strlen(sum)+1) { | |
cb80514d | 474 | warn("writing sum in %s failed: %s\n", |
1da177e4 LT |
475 | filename, strerror(errno)); |
476 | goto out; | |
477 | } | |
478 | out: | |
479 | close(fd); | |
480 | } | |
481 | ||
61d9cdf2 | 482 | static int strip_rcs_crap(char *version) |
1da177e4 LT |
483 | { |
484 | unsigned int len, full_len; | |
485 | ||
486 | if (strncmp(version, "$Revision", strlen("$Revision")) != 0) | |
487 | return 0; | |
488 | ||
489 | /* Space for version string follows. */ | |
490 | full_len = strlen(version) + strlen(version + strlen(version) + 1) + 2; | |
491 | ||
492 | /* Move string to start with version number: prefix will be | |
493 | * $Revision$ or $Revision: */ | |
494 | len = strlen("$Revision"); | |
495 | if (version[len] == ':' || version[len] == '$') | |
496 | len++; | |
497 | while (isspace(version[len])) | |
498 | len++; | |
499 | memmove(version, version+len, full_len-len); | |
500 | full_len -= len; | |
501 | ||
502 | /* Preserve up to next whitespace. */ | |
503 | len = 0; | |
504 | while (version[len] && !isspace(version[len])) | |
505 | len++; | |
506 | memmove(version + len, version + strlen(version), | |
507 | full_len - strlen(version)); | |
508 | return 1; | |
509 | } | |
510 | ||
511 | /* Clean up RCS-style version numbers. */ | |
512 | void maybe_frob_rcs_version(const char *modfilename, | |
513 | char *version, | |
514 | void *modinfo, | |
515 | unsigned long version_offset) | |
516 | { | |
517 | if (strip_rcs_crap(version)) | |
518 | write_version(modfilename, version, version_offset); | |
519 | } |