1 /* crypto/err/err.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2019 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
71 * distribution.
72 *
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 *
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
82 *
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
105 *
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
109 *
110 */
111
112 #include <stdio.h>
113 #include <stdarg.h>
114 #include <string.h>
115 #include "cryptlib.h"
116 #include <openssl/lhash.h>
117 #include <openssl/crypto.h>
118 #include <openssl/buffer.h>
119 #include <openssl/bio.h>
120 #include <openssl/err.h>
121 #include "constant_time_locl.h"
122
123 DECLARE_LHASH_OF(ERR_STRING_DATA);
124 DECLARE_LHASH_OF(ERR_STATE);
125
126 static void err_load_strings(int lib, ERR_STRING_DATA *str);
127
128 static void ERR_STATE_free(ERR_STATE *s);
129 #ifndef OPENSSL_NO_ERR
130 static ERR_STRING_DATA ERR_str_libraries[] = {
131 {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
132 {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
133 {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
134 {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
135 {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
136 {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
137 {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
138 {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
139 {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
140 {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
141 {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
142 {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
143 {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
144 {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
145 {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
146 {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
147 {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
148 {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
149 {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
150 {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
151 {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
152 {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
153 {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
154 {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
155 {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
156 {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
157 {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
158 {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
159 {0, NULL},
160 };
161
162 static ERR_STRING_DATA ERR_str_functs[] = {
163 {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
164 {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
165 {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
166 {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
167 {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
168 {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
169 {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
170 {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
171 # ifdef OPENSSL_SYS_WINDOWS
172 {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
173 # endif
174 {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
175 {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
176 {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
177 {0, NULL},
178 };
179
180 static ERR_STRING_DATA ERR_str_reasons[] = {
181 {ERR_R_SYS_LIB, "system lib"},
182 {ERR_R_BN_LIB, "BN lib"},
183 {ERR_R_RSA_LIB, "RSA lib"},
184 {ERR_R_DH_LIB, "DH lib"},
185 {ERR_R_EVP_LIB, "EVP lib"},
186 {ERR_R_BUF_LIB, "BUF lib"},
187 {ERR_R_OBJ_LIB, "OBJ lib"},
188 {ERR_R_PEM_LIB, "PEM lib"},
189 {ERR_R_DSA_LIB, "DSA lib"},
190 {ERR_R_X509_LIB, "X509 lib"},
191 {ERR_R_ASN1_LIB, "ASN1 lib"},
192 {ERR_R_CONF_LIB, "CONF lib"},
193 {ERR_R_CRYPTO_LIB, "CRYPTO lib"},
194 {ERR_R_EC_LIB, "EC lib"},
195 {ERR_R_SSL_LIB, "SSL lib"},
196 {ERR_R_BIO_LIB, "BIO lib"},
197 {ERR_R_PKCS7_LIB, "PKCS7 lib"},
198 {ERR_R_X509V3_LIB, "X509V3 lib"},
199 {ERR_R_PKCS12_LIB, "PKCS12 lib"},
200 {ERR_R_RAND_LIB, "RAND lib"},
201 {ERR_R_DSO_LIB, "DSO lib"},
202 {ERR_R_ENGINE_LIB, "ENGINE lib"},
203 {ERR_R_OCSP_LIB, "OCSP lib"},
204 {ERR_R_TS_LIB, "TS lib"},
205
206 {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
207 {ERR_R_BAD_ASN1_OBJECT_HEADER, "bad asn1 object header"},
208 {ERR_R_BAD_GET_ASN1_OBJECT_CALL, "bad get asn1 object call"},
209 {ERR_R_EXPECTING_AN_ASN1_SEQUENCE, "expecting an asn1 sequence"},
210 {ERR_R_ASN1_LENGTH_MISMATCH, "asn1 length mismatch"},
211 {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
212
213 {ERR_R_FATAL, "fatal"},
214 {ERR_R_MALLOC_FAILURE, "malloc failure"},
215 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
216 "called a function you should not call"},
217 {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
218 {ERR_R_INTERNAL_ERROR, "internal error"},
219 {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
220
221 {0, NULL},
222 };
223 #endif
224
225 /* Define the predeclared (but externally opaque) "ERR_FNS" type */
226 struct st_ERR_FNS {
227 /* Works on the "error_hash" string table */
228 LHASH_OF(ERR_STRING_DATA) *(*cb_err_get) (int create);
229 void (*cb_err_del) (void);
230 ERR_STRING_DATA *(*cb_err_get_item) (const ERR_STRING_DATA *);
231 ERR_STRING_DATA *(*cb_err_set_item) (ERR_STRING_DATA *);
232 ERR_STRING_DATA *(*cb_err_del_item) (ERR_STRING_DATA *);
233 /* Works on the "thread_hash" error-state table */
234 LHASH_OF(ERR_STATE) *(*cb_thread_get) (int create);
235 void (*cb_thread_release) (LHASH_OF(ERR_STATE) **hash);
236 ERR_STATE *(*cb_thread_get_item) (const ERR_STATE *);
237 ERR_STATE *(*cb_thread_set_item) (ERR_STATE *);
238 void (*cb_thread_del_item) (const ERR_STATE *);
239 /* Returns the next available error "library" numbers */
240 int (*cb_get_next_lib) (void);
241 };
242
243 /* Predeclarations of the "err_defaults" functions */
244 static LHASH_OF(ERR_STRING_DATA) *int_err_get(int create);
245 static void int_err_del(void);
246 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
247 static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *);
248 static ERR_STRING_DATA *int_err_del_item(ERR_STRING_DATA *);
249 static LHASH_OF(ERR_STATE) *int_thread_get(int create);
250 static void int_thread_release(LHASH_OF(ERR_STATE) **hash);
251 static ERR_STATE *int_thread_get_item(const ERR_STATE *);
252 static ERR_STATE *int_thread_set_item(ERR_STATE *);
253 static void int_thread_del_item(const ERR_STATE *);
254 static int int_err_get_next_lib(void);
255 /* The static ERR_FNS table using these defaults functions */
256 static const ERR_FNS err_defaults = {
257 int_err_get,
258 int_err_del,
259 int_err_get_item,
260 int_err_set_item,
261 int_err_del_item,
262 int_thread_get,
263 int_thread_release,
264 int_thread_get_item,
265 int_thread_set_item,
266 int_thread_del_item,
267 int_err_get_next_lib
268 };
269
270 /* The replacable table of ERR_FNS functions we use at run-time */
271 static const ERR_FNS *err_fns = NULL;
272
273 /* Eg. rather than using "err_get()", use "ERRFN(err_get)()". */
274 #define ERRFN(a) err_fns->cb_##a
275
276 /*
277 * The internal state used by "err_defaults" - as such, the setting, reading,
278 * creating, and deleting of this data should only be permitted via the
279 * "err_defaults" functions. This way, a linked module can completely defer
280 * all ERR state operation (together with requisite locking) to the
281 * implementations and state in the loading application.
282 */
283 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
284 static LHASH_OF(ERR_STATE) *int_thread_hash = NULL;
285 static int int_thread_hash_references = 0;
286 static int int_err_library_number = ERR_LIB_USER;
287
288 /*
289 * Internal function that checks whether "err_fns" is set and if not, sets it
290 * to the defaults.
291 */
err_fns_check(void)292 static void err_fns_check(void)
293 {
294 if (err_fns)
295 return;
296
297 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
298 if (!err_fns)
299 err_fns = &err_defaults;
300 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
301 }
302
303 /* API functions to get or set the underlying ERR functions. */
304
ERR_get_implementation(void)305 const ERR_FNS *ERR_get_implementation(void)
306 {
307 err_fns_check();
308 return err_fns;
309 }
310
ERR_set_implementation(const ERR_FNS * fns)311 int ERR_set_implementation(const ERR_FNS *fns)
312 {
313 int ret = 0;
314
315 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
316 /*
317 * It's too late if 'err_fns' is non-NULL. BTW: not much point setting an
318 * error is there?!
319 */
320 if (!err_fns) {
321 err_fns = fns;
322 ret = 1;
323 }
324 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
325 return ret;
326 }
327
328 /*
329 * These are the callbacks provided to "lh_new()" when creating the LHASH
330 * tables internal to the "err_defaults" implementation.
331 */
332
333 static unsigned long get_error_values(int inc, int top, const char **file,
334 int *line, const char **data,
335 int *flags);
336
337 /* The internal functions used in the "err_defaults" implementation */
338
err_string_data_hash(const ERR_STRING_DATA * a)339 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
340 {
341 unsigned long ret, l;
342
343 l = a->error;
344 ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
345 return (ret ^ ret % 19 * 13);
346 }
347
IMPLEMENT_LHASH_HASH_FN(err_string_data,ERR_STRING_DATA)348 static IMPLEMENT_LHASH_HASH_FN(err_string_data, ERR_STRING_DATA)
349
350 static int err_string_data_cmp(const ERR_STRING_DATA *a,
351 const ERR_STRING_DATA *b)
352 {
353 return (int)(a->error - b->error);
354 }
355
IMPLEMENT_LHASH_COMP_FN(err_string_data,ERR_STRING_DATA)356 static IMPLEMENT_LHASH_COMP_FN(err_string_data, ERR_STRING_DATA)
357
358 static LHASH_OF(ERR_STRING_DATA) *int_err_get(int create)
359 {
360 LHASH_OF(ERR_STRING_DATA) *ret = NULL;
361
362 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
363 if (!int_error_hash && create) {
364 CRYPTO_push_info("int_err_get (err.c)");
365 int_error_hash = lh_ERR_STRING_DATA_new();
366 CRYPTO_pop_info();
367 }
368 if (int_error_hash)
369 ret = int_error_hash;
370 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
371
372 return ret;
373 }
374
int_err_del(void)375 static void int_err_del(void)
376 {
377 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
378 if (int_error_hash) {
379 lh_ERR_STRING_DATA_free(int_error_hash);
380 int_error_hash = NULL;
381 }
382 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
383 }
384
int_err_get_item(const ERR_STRING_DATA * d)385 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
386 {
387 ERR_STRING_DATA *p;
388 LHASH_OF(ERR_STRING_DATA) *hash;
389
390 err_fns_check();
391 hash = ERRFN(err_get) (0);
392 if (!hash)
393 return NULL;
394
395 CRYPTO_r_lock(CRYPTO_LOCK_ERR);
396 p = lh_ERR_STRING_DATA_retrieve(hash, d);
397 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
398
399 return p;
400 }
401
int_err_set_item(ERR_STRING_DATA * d)402 static ERR_STRING_DATA *int_err_set_item(ERR_STRING_DATA *d)
403 {
404 ERR_STRING_DATA *p;
405 LHASH_OF(ERR_STRING_DATA) *hash;
406
407 err_fns_check();
408 hash = ERRFN(err_get) (1);
409 if (!hash)
410 return NULL;
411
412 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
413 p = lh_ERR_STRING_DATA_insert(hash, d);
414 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
415
416 return p;
417 }
418
int_err_del_item(ERR_STRING_DATA * d)419 static ERR_STRING_DATA *int_err_del_item(ERR_STRING_DATA *d)
420 {
421 ERR_STRING_DATA *p;
422 LHASH_OF(ERR_STRING_DATA) *hash;
423
424 err_fns_check();
425 hash = ERRFN(err_get) (0);
426 if (!hash)
427 return NULL;
428
429 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
430 p = lh_ERR_STRING_DATA_delete(hash, d);
431 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
432
433 return p;
434 }
435
err_state_hash(const ERR_STATE * a)436 static unsigned long err_state_hash(const ERR_STATE *a)
437 {
438 return CRYPTO_THREADID_hash(&a->tid) * 13;
439 }
440
IMPLEMENT_LHASH_HASH_FN(err_state,ERR_STATE)441 static IMPLEMENT_LHASH_HASH_FN(err_state, ERR_STATE)
442
443 static int err_state_cmp(const ERR_STATE *a, const ERR_STATE *b)
444 {
445 return CRYPTO_THREADID_cmp(&a->tid, &b->tid);
446 }
447
IMPLEMENT_LHASH_COMP_FN(err_state,ERR_STATE)448 static IMPLEMENT_LHASH_COMP_FN(err_state, ERR_STATE)
449
450 static LHASH_OF(ERR_STATE) *int_thread_get(int create)
451 {
452 LHASH_OF(ERR_STATE) *ret = NULL;
453
454 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
455 if (!int_thread_hash && create) {
456 CRYPTO_push_info("int_thread_get (err.c)");
457 int_thread_hash = lh_ERR_STATE_new();
458 CRYPTO_pop_info();
459 }
460 if (int_thread_hash) {
461 int_thread_hash_references++;
462 ret = int_thread_hash;
463 }
464 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
465 return ret;
466 }
467
int_thread_release(LHASH_OF (ERR_STATE)** hash)468 static void int_thread_release(LHASH_OF(ERR_STATE) **hash)
469 {
470 int i;
471
472 if (hash == NULL || *hash == NULL)
473 return;
474
475 i = CRYPTO_add(&int_thread_hash_references, -1, CRYPTO_LOCK_ERR);
476
477 #ifdef REF_PRINT
478 fprintf(stderr, "%4d:%s\n", int_thread_hash_references, "ERR");
479 #endif
480 if (i > 0)
481 return;
482 #ifdef REF_CHECK
483 if (i < 0) {
484 fprintf(stderr, "int_thread_release, bad reference count\n");
485 abort(); /* ok */
486 }
487 #endif
488 *hash = NULL;
489 }
490
int_thread_get_item(const ERR_STATE * d)491 static ERR_STATE *int_thread_get_item(const ERR_STATE *d)
492 {
493 ERR_STATE *p;
494 LHASH_OF(ERR_STATE) *hash;
495
496 err_fns_check();
497 hash = ERRFN(thread_get) (0);
498 if (!hash)
499 return NULL;
500
501 CRYPTO_r_lock(CRYPTO_LOCK_ERR);
502 p = lh_ERR_STATE_retrieve(hash, d);
503 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
504
505 ERRFN(thread_release) (&hash);
506 return p;
507 }
508
int_thread_set_item(ERR_STATE * d)509 static ERR_STATE *int_thread_set_item(ERR_STATE *d)
510 {
511 ERR_STATE *p;
512 LHASH_OF(ERR_STATE) *hash;
513
514 err_fns_check();
515 hash = ERRFN(thread_get) (1);
516 if (!hash)
517 return NULL;
518
519 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
520 p = lh_ERR_STATE_insert(hash, d);
521 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
522
523 ERRFN(thread_release) (&hash);
524 return p;
525 }
526
int_thread_del_item(const ERR_STATE * d)527 static void int_thread_del_item(const ERR_STATE *d)
528 {
529 ERR_STATE *p;
530 LHASH_OF(ERR_STATE) *hash;
531
532 err_fns_check();
533 hash = ERRFN(thread_get) (0);
534 if (!hash)
535 return;
536
537 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
538 p = lh_ERR_STATE_delete(hash, d);
539 /* make sure we don't leak memory */
540 if (int_thread_hash_references == 1
541 && int_thread_hash && lh_ERR_STATE_num_items(int_thread_hash) == 0) {
542 lh_ERR_STATE_free(int_thread_hash);
543 int_thread_hash = NULL;
544 }
545 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
546
547 ERRFN(thread_release) (&hash);
548 if (p)
549 ERR_STATE_free(p);
550 }
551
int_err_get_next_lib(void)552 static int int_err_get_next_lib(void)
553 {
554 int ret;
555
556 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
557 ret = int_err_library_number++;
558 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
559
560 return ret;
561 }
562
563 #ifndef OPENSSL_NO_ERR
564 # define NUM_SYS_STR_REASONS 127
565 # define LEN_SYS_STR_REASON 32
566
567 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
568 /*
569 * SYS_str_reasons is filled with copies of strerror() results at
570 * initialization. 'errno' values up to 127 should cover all usual errors,
571 * others will be displayed numerically by ERR_error_string. It is crucial
572 * that we have something for each reason code that occurs in
573 * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
574 * which always gets an errno value and never one of those 'standard' reason
575 * codes.
576 */
577
build_SYS_str_reasons(void)578 static void build_SYS_str_reasons(void)
579 {
580 /* OPENSSL_malloc cannot be used here, use static storage instead */
581 static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
582 int i;
583 static int init = 1;
584
585 CRYPTO_r_lock(CRYPTO_LOCK_ERR);
586 if (!init) {
587 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
588 return;
589 }
590
591 CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
592 CRYPTO_w_lock(CRYPTO_LOCK_ERR);
593 if (!init) {
594 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
595 return;
596 }
597
598 for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
599 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
600
601 str->error = (unsigned long)i;
602 if (str->string == NULL) {
603 char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
604 char *src = strerror(i);
605 if (src != NULL) {
606 strncpy(*dest, src, sizeof(*dest));
607 (*dest)[sizeof(*dest) - 1] = '\0';
608 str->string = *dest;
609 }
610 }
611 if (str->string == NULL)
612 str->string = "unknown";
613 }
614
615 /*
616 * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
617 * required by ERR_load_strings.
618 */
619
620 init = 0;
621
622 CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
623 }
624 #endif
625
626 #define err_clear_data(p,i) \
627 do { \
628 if (((p)->err_data[i] != NULL) && \
629 (p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
630 { \
631 OPENSSL_free((p)->err_data[i]); \
632 (p)->err_data[i]=NULL; \
633 } \
634 (p)->err_data_flags[i]=0; \
635 } while(0)
636
637 #define err_clear(p,i) \
638 do { \
639 (p)->err_flags[i]=0; \
640 (p)->err_buffer[i]=0; \
641 err_clear_data(p,i); \
642 (p)->err_file[i]=NULL; \
643 (p)->err_line[i]= -1; \
644 } while(0)
645
ERR_STATE_free(ERR_STATE * s)646 static void ERR_STATE_free(ERR_STATE *s)
647 {
648 int i;
649
650 if (s == NULL)
651 return;
652
653 for (i = 0; i < ERR_NUM_ERRORS; i++) {
654 err_clear_data(s, i);
655 }
656 OPENSSL_free(s);
657 }
658
ERR_load_ERR_strings(void)659 void ERR_load_ERR_strings(void)
660 {
661 err_fns_check();
662 #ifndef OPENSSL_NO_ERR
663 err_load_strings(0, ERR_str_libraries);
664 err_load_strings(0, ERR_str_reasons);
665 err_load_strings(ERR_LIB_SYS, ERR_str_functs);
666 build_SYS_str_reasons();
667 err_load_strings(ERR_LIB_SYS, SYS_str_reasons);
668 #endif
669 }
670
err_load_strings(int lib,ERR_STRING_DATA * str)671 static void err_load_strings(int lib, ERR_STRING_DATA *str)
672 {
673 while (str->error) {
674 if (lib)
675 str->error |= ERR_PACK(lib, 0, 0);
676 ERRFN(err_set_item) (str);
677 str++;
678 }
679 }
680
ERR_load_strings(int lib,ERR_STRING_DATA * str)681 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
682 {
683 ERR_load_ERR_strings();
684 err_load_strings(lib, str);
685 }
686
ERR_unload_strings(int lib,ERR_STRING_DATA * str)687 void ERR_unload_strings(int lib, ERR_STRING_DATA *str)
688 {
689 while (str->error) {
690 if (lib)
691 str->error |= ERR_PACK(lib, 0, 0);
692 ERRFN(err_del_item) (str);
693 str++;
694 }
695 }
696
ERR_free_strings(void)697 void ERR_free_strings(void)
698 {
699 err_fns_check();
700 ERRFN(err_del) ();
701 }
702
703 /********************************************************/
704
ERR_put_error(int lib,int func,int reason,const char * file,int line)705 void ERR_put_error(int lib, int func, int reason, const char *file, int line)
706 {
707 ERR_STATE *es;
708
709 #ifdef _OSD_POSIX
710 /*
711 * In the BS2000-OSD POSIX subsystem, the compiler generates path names
712 * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
713 * something sensible. @@@ We shouldn't modify a const string, though.
714 */
715 if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
716 char *end;
717
718 /* Skip the "*POSIX(" prefix */
719 file += sizeof("*POSIX(") - 1;
720 end = &file[strlen(file) - 1];
721 if (*end == ')')
722 *end = '\0';
723 /* Optional: use the basename of the path only. */
724 if ((end = strrchr(file, '/')) != NULL)
725 file = &end[1];
726 }
727 #endif
728 es = ERR_get_state();
729 if (es == NULL)
730 return;
731
732 es->top = (es->top + 1) % ERR_NUM_ERRORS;
733 if (es->top == es->bottom)
734 es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
735 es->err_flags[es->top] = 0;
736 es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
737 es->err_file[es->top] = file;
738 es->err_line[es->top] = line;
739 err_clear_data(es, es->top);
740 }
741
ERR_clear_error(void)742 void ERR_clear_error(void)
743 {
744 int i;
745 ERR_STATE *es;
746
747 es = ERR_get_state();
748 if (es == NULL)
749 return;
750
751 for (i = 0; i < ERR_NUM_ERRORS; i++) {
752 err_clear(es, i);
753 }
754 es->top = es->bottom = 0;
755 }
756
ERR_get_error(void)757 unsigned long ERR_get_error(void)
758 {
759 return (get_error_values(1, 0, NULL, NULL, NULL, NULL));
760 }
761
ERR_get_error_line(const char ** file,int * line)762 unsigned long ERR_get_error_line(const char **file, int *line)
763 {
764 return (get_error_values(1, 0, file, line, NULL, NULL));
765 }
766
ERR_get_error_line_data(const char ** file,int * line,const char ** data,int * flags)767 unsigned long ERR_get_error_line_data(const char **file, int *line,
768 const char **data, int *flags)
769 {
770 return (get_error_values(1, 0, file, line, data, flags));
771 }
772
ERR_peek_error(void)773 unsigned long ERR_peek_error(void)
774 {
775 return (get_error_values(0, 0, NULL, NULL, NULL, NULL));
776 }
777
ERR_peek_error_line(const char ** file,int * line)778 unsigned long ERR_peek_error_line(const char **file, int *line)
779 {
780 return (get_error_values(0, 0, file, line, NULL, NULL));
781 }
782
ERR_peek_error_line_data(const char ** file,int * line,const char ** data,int * flags)783 unsigned long ERR_peek_error_line_data(const char **file, int *line,
784 const char **data, int *flags)
785 {
786 return (get_error_values(0, 0, file, line, data, flags));
787 }
788
ERR_peek_last_error(void)789 unsigned long ERR_peek_last_error(void)
790 {
791 return (get_error_values(0, 1, NULL, NULL, NULL, NULL));
792 }
793
ERR_peek_last_error_line(const char ** file,int * line)794 unsigned long ERR_peek_last_error_line(const char **file, int *line)
795 {
796 return (get_error_values(0, 1, file, line, NULL, NULL));
797 }
798
ERR_peek_last_error_line_data(const char ** file,int * line,const char ** data,int * flags)799 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
800 const char **data, int *flags)
801 {
802 return (get_error_values(0, 1, file, line, data, flags));
803 }
804
get_error_values(int inc,int top,const char ** file,int * line,const char ** data,int * flags)805 static unsigned long get_error_values(int inc, int top, const char **file,
806 int *line, const char **data,
807 int *flags)
808 {
809 int i = 0;
810 ERR_STATE *es;
811 unsigned long ret;
812
813 es = ERR_get_state();
814 if (es == NULL)
815 return 0;
816
817 if (inc && top) {
818 if (file)
819 *file = "";
820 if (line)
821 *line = 0;
822 if (data)
823 *data = "";
824 if (flags)
825 *flags = 0;
826
827 return ERR_R_INTERNAL_ERROR;
828 }
829
830 while (es->bottom != es->top) {
831 if (es->err_flags[es->top] & ERR_FLAG_CLEAR) {
832 err_clear(es, es->top);
833 es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
834 continue;
835 }
836 i = (es->bottom + 1) % ERR_NUM_ERRORS;
837 if (es->err_flags[i] & ERR_FLAG_CLEAR) {
838 es->bottom = i;
839 err_clear(es, es->bottom);
840 continue;
841 }
842 break;
843 }
844
845 if (es->bottom == es->top)
846 return 0;
847
848 if (top)
849 i = es->top; /* last error */
850 else
851 i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
852
853 ret = es->err_buffer[i];
854 if (inc) {
855 es->bottom = i;
856 es->err_buffer[i] = 0;
857 }
858
859 if ((file != NULL) && (line != NULL)) {
860 if (es->err_file[i] == NULL) {
861 *file = "NA";
862 if (line != NULL)
863 *line = 0;
864 } else {
865 *file = es->err_file[i];
866 if (line != NULL)
867 *line = es->err_line[i];
868 }
869 }
870
871 if (data == NULL) {
872 if (inc) {
873 err_clear_data(es, i);
874 }
875 } else {
876 if (es->err_data[i] == NULL) {
877 *data = "";
878 if (flags != NULL)
879 *flags = 0;
880 } else {
881 *data = es->err_data[i];
882 if (flags != NULL)
883 *flags = es->err_data_flags[i];
884 }
885 }
886 return ret;
887 }
888
ERR_error_string_n(unsigned long e,char * buf,size_t len)889 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
890 {
891 char lsbuf[64], fsbuf[64], rsbuf[64];
892 const char *ls, *fs, *rs;
893 unsigned long l, f, r;
894
895 if (len == 0)
896 return;
897
898 l = ERR_GET_LIB(e);
899 f = ERR_GET_FUNC(e);
900 r = ERR_GET_REASON(e);
901
902 ls = ERR_lib_error_string(e);
903 fs = ERR_func_error_string(e);
904 rs = ERR_reason_error_string(e);
905
906 if (ls == NULL)
907 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
908 if (fs == NULL)
909 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
910 if (rs == NULL)
911 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
912
913 BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls ? ls : lsbuf,
914 fs ? fs : fsbuf, rs ? rs : rsbuf);
915 if (strlen(buf) == len - 1) {
916 /*
917 * output may be truncated; make sure we always have 5
918 * colon-separated fields, i.e. 4 colons ...
919 */
920 #define NUM_COLONS 4
921 if (len > NUM_COLONS) { /* ... if possible */
922 int i;
923 char *s = buf;
924
925 for (i = 0; i < NUM_COLONS; i++) {
926 char *colon = strchr(s, ':');
927 if (colon == NULL || colon > &buf[len - 1] - NUM_COLONS + i) {
928 /*
929 * set colon no. i at last possible position (buf[len-1]
930 * is the terminating 0)
931 */
932 colon = &buf[len - 1] - NUM_COLONS + i;
933 *colon = ':';
934 }
935 s = colon + 1;
936 }
937 }
938 }
939 }
940
941 /* BAD for multi-threading: uses a local buffer if ret == NULL */
942 /*
943 * ERR_error_string_n should be used instead for ret != NULL as
944 * ERR_error_string cannot know how large the buffer is
945 */
ERR_error_string(unsigned long e,char * ret)946 char *ERR_error_string(unsigned long e, char *ret)
947 {
948 static char buf[256];
949
950 if (ret == NULL)
951 ret = buf;
952 ERR_error_string_n(e, ret, 256);
953
954 return ret;
955 }
956
LHASH_OF(ERR_STRING_DATA)957 LHASH_OF(ERR_STRING_DATA) *ERR_get_string_table(void)
958 {
959 err_fns_check();
960 return ERRFN(err_get) (0);
961 }
962
LHASH_OF(ERR_STATE)963 LHASH_OF(ERR_STATE) *ERR_get_err_state_table(void)
964 {
965 err_fns_check();
966 return ERRFN(thread_get) (0);
967 }
968
ERR_release_err_state_table(LHASH_OF (ERR_STATE)** hash)969 void ERR_release_err_state_table(LHASH_OF(ERR_STATE) **hash)
970 {
971 err_fns_check();
972 ERRFN(thread_release) (hash);
973 }
974
ERR_lib_error_string(unsigned long e)975 const char *ERR_lib_error_string(unsigned long e)
976 {
977 ERR_STRING_DATA d, *p;
978 unsigned long l;
979
980 err_fns_check();
981 l = ERR_GET_LIB(e);
982 d.error = ERR_PACK(l, 0, 0);
983 p = ERRFN(err_get_item) (&d);
984 return ((p == NULL) ? NULL : p->string);
985 }
986
ERR_func_error_string(unsigned long e)987 const char *ERR_func_error_string(unsigned long e)
988 {
989 ERR_STRING_DATA d, *p;
990 unsigned long l, f;
991
992 err_fns_check();
993 l = ERR_GET_LIB(e);
994 f = ERR_GET_FUNC(e);
995 d.error = ERR_PACK(l, f, 0);
996 p = ERRFN(err_get_item) (&d);
997 return ((p == NULL) ? NULL : p->string);
998 }
999
ERR_reason_error_string(unsigned long e)1000 const char *ERR_reason_error_string(unsigned long e)
1001 {
1002 ERR_STRING_DATA d, *p = NULL;
1003 unsigned long l, r;
1004
1005 err_fns_check();
1006 l = ERR_GET_LIB(e);
1007 r = ERR_GET_REASON(e);
1008 d.error = ERR_PACK(l, 0, r);
1009 p = ERRFN(err_get_item) (&d);
1010 if (!p) {
1011 d.error = ERR_PACK(0, 0, r);
1012 p = ERRFN(err_get_item) (&d);
1013 }
1014 return ((p == NULL) ? NULL : p->string);
1015 }
1016
ERR_remove_thread_state(const CRYPTO_THREADID * id)1017 void ERR_remove_thread_state(const CRYPTO_THREADID *id)
1018 {
1019 ERR_STATE tmp;
1020
1021 if (id)
1022 CRYPTO_THREADID_cpy(&tmp.tid, id);
1023 else
1024 CRYPTO_THREADID_current(&tmp.tid);
1025 err_fns_check();
1026 /*
1027 * thread_del_item automatically destroys the LHASH if the number of
1028 * items reaches zero.
1029 */
1030 ERRFN(thread_del_item) (&tmp);
1031 }
1032
1033 #ifndef OPENSSL_NO_DEPRECATED
ERR_remove_state(unsigned long pid)1034 void ERR_remove_state(unsigned long pid)
1035 {
1036 ERR_remove_thread_state(NULL);
1037 }
1038 #endif
1039
ERR_get_state(void)1040 ERR_STATE *ERR_get_state(void)
1041 {
1042 ERR_STATE *ret, tmp, *tmpp = NULL;
1043 int i;
1044 CRYPTO_THREADID tid;
1045
1046 err_fns_check();
1047 CRYPTO_THREADID_current(&tid);
1048 CRYPTO_THREADID_cpy(&tmp.tid, &tid);
1049 ret = ERRFN(thread_get_item) (&tmp);
1050
1051 /* ret == the error state, if NULL, make a new one */
1052 if (ret == NULL) {
1053 ret = (ERR_STATE *)OPENSSL_malloc(sizeof(ERR_STATE));
1054 if (ret == NULL)
1055 return NULL;
1056 CRYPTO_THREADID_cpy(&ret->tid, &tid);
1057 ret->top = 0;
1058 ret->bottom = 0;
1059 for (i = 0; i < ERR_NUM_ERRORS; i++) {
1060 ret->err_data[i] = NULL;
1061 ret->err_data_flags[i] = 0;
1062 }
1063 tmpp = ERRFN(thread_set_item) (ret);
1064 /* To check if insertion failed, do a get. */
1065 if (ERRFN(thread_get_item) (ret) != ret) {
1066 ERR_STATE_free(ret); /* could not insert it */
1067 return NULL;
1068 }
1069 /*
1070 * If a race occured in this function and we came second, tmpp is the
1071 * first one that we just replaced.
1072 */
1073 if (tmpp)
1074 ERR_STATE_free(tmpp);
1075 }
1076 return ret;
1077 }
1078
ERR_get_next_error_library(void)1079 int ERR_get_next_error_library(void)
1080 {
1081 err_fns_check();
1082 return ERRFN(get_next_lib) ();
1083 }
1084
ERR_set_error_data(char * data,int flags)1085 void ERR_set_error_data(char *data, int flags)
1086 {
1087 ERR_STATE *es;
1088 int i;
1089
1090 es = ERR_get_state();
1091 if (es == NULL)
1092 return;
1093
1094 i = es->top;
1095
1096 err_clear_data(es, i);
1097 es->err_data[i] = data;
1098 es->err_data_flags[i] = flags;
1099 }
1100
ERR_add_error_data(int num,...)1101 void ERR_add_error_data(int num, ...)
1102 {
1103 va_list args;
1104 va_start(args, num);
1105 ERR_add_error_vdata(num, args);
1106 va_end(args);
1107 }
1108
ERR_add_error_vdata(int num,va_list args)1109 void ERR_add_error_vdata(int num, va_list args)
1110 {
1111 int i, n, s;
1112 char *str, *p, *a;
1113
1114 s = 80;
1115 str = OPENSSL_malloc(s + 1);
1116 if (str == NULL)
1117 return;
1118 str[0] = '\0';
1119
1120 n = 0;
1121 for (i = 0; i < num; i++) {
1122 a = va_arg(args, char *);
1123 /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
1124 if (a != NULL) {
1125 n += strlen(a);
1126 if (n > s) {
1127 s = n + 20;
1128 p = OPENSSL_realloc(str, s + 1);
1129 if (p == NULL) {
1130 OPENSSL_free(str);
1131 return;
1132 } else
1133 str = p;
1134 }
1135 BUF_strlcat(str, a, (size_t)s + 1);
1136 }
1137 }
1138 ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
1139 }
1140
ERR_set_mark(void)1141 int ERR_set_mark(void)
1142 {
1143 ERR_STATE *es;
1144
1145 es = ERR_get_state();
1146 if (es == NULL)
1147 return 0;
1148
1149 if (es->bottom == es->top)
1150 return 0;
1151 es->err_flags[es->top] |= ERR_FLAG_MARK;
1152 return 1;
1153 }
1154
ERR_pop_to_mark(void)1155 int ERR_pop_to_mark(void)
1156 {
1157 ERR_STATE *es;
1158
1159 es = ERR_get_state();
1160 if (es == NULL)
1161 return 0;
1162
1163 while (es->bottom != es->top
1164 && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
1165 err_clear(es, es->top);
1166 es->top -= 1;
1167 if (es->top == -1)
1168 es->top = ERR_NUM_ERRORS - 1;
1169 }
1170
1171 if (es->bottom == es->top)
1172 return 0;
1173 es->err_flags[es->top] &= ~ERR_FLAG_MARK;
1174 return 1;
1175 }
1176
err_clear_last_constant_time(int clear)1177 void err_clear_last_constant_time(int clear)
1178 {
1179 ERR_STATE *es;
1180 int top;
1181
1182 es = ERR_get_state();
1183 if (es == NULL)
1184 return;
1185
1186 top = es->top;
1187
1188 /*
1189 * Flag error as cleared but remove it elsewhere to avoid two errors
1190 * accessing the same error stack location, revealing timing information.
1191 */
1192 clear = constant_time_select_int(constant_time_eq_int(clear, 0),
1193 0, ERR_FLAG_CLEAR);
1194 es->err_flags[top] |= clear;
1195 }
1196