2 * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* TODO: When ERR_STATE becomes opaque, this musts be removed */
11 #define OSSL_FORCE_ERR_STATE
16 #include "crypto/cryptlib.h"
17 #include "internal/err.h"
18 #include "crypto/err.h"
19 #include <openssl/err.h>
20 #include <openssl/crypto.h>
21 #include <openssl/buffer.h>
22 #include <openssl/bio.h>
23 #include <openssl/opensslconf.h>
24 #include "internal/thread_once.h"
25 #include "crypto/ctype.h"
26 #include "internal/constant_time.h"
28 #include "err_local.h"
30 /* Forward declaration in case it's not published because of configuration */
31 ERR_STATE *ERR_get_state(void);
33 static int err_load_strings(const ERR_STRING_DATA *str);
35 static void ERR_STATE_free(ERR_STATE *s);
36 #ifndef OPENSSL_NO_ERR
37 static ERR_STRING_DATA ERR_str_libraries[] = {
38 {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
39 {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
40 {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
41 {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
42 {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
43 {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
44 {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
45 {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
46 {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
47 {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
48 {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
49 {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
50 {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
51 {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
52 {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
53 {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
54 {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
55 {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
56 {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
57 {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
58 {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
59 {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
60 {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
61 {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
62 {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
63 {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
64 {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
65 {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
66 {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
67 {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
68 {ERR_PACK(ERR_LIB_CRMF, 0, 0), "CRMF routines"},
69 {ERR_PACK(ERR_LIB_CMP, 0, 0), "CMP routines"},
70 {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
71 {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
72 {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
73 {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
74 {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},
75 {ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"},
76 {ERR_PACK(ERR_LIB_ESS, 0, 0), "ESS routines"},
77 {ERR_PACK(ERR_LIB_PROV, 0, 0), "Provider routines"},
81 static ERR_STRING_DATA ERR_str_reasons[] = {
82 {ERR_R_SYS_LIB, "system lib"},
83 {ERR_R_BN_LIB, "BN lib"},
84 {ERR_R_RSA_LIB, "RSA lib"},
85 {ERR_R_DH_LIB, "DH lib"},
86 {ERR_R_EVP_LIB, "EVP lib"},
87 {ERR_R_BUF_LIB, "BUF lib"},
88 {ERR_R_OBJ_LIB, "OBJ lib"},
89 {ERR_R_PEM_LIB, "PEM lib"},
90 {ERR_R_DSA_LIB, "DSA lib"},
91 {ERR_R_X509_LIB, "X509 lib"},
92 {ERR_R_ASN1_LIB, "ASN1 lib"},
93 {ERR_R_EC_LIB, "EC lib"},
94 {ERR_R_BIO_LIB, "BIO lib"},
95 {ERR_R_PKCS7_LIB, "PKCS7 lib"},
96 {ERR_R_X509V3_LIB, "X509V3 lib"},
97 {ERR_R_ENGINE_LIB, "ENGINE lib"},
98 {ERR_R_UI_LIB, "UI lib"},
99 {ERR_R_OSSL_STORE_LIB, "STORE lib"},
100 {ERR_R_ECDSA_LIB, "ECDSA lib"},
102 {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
103 {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
105 {ERR_R_FATAL, "fatal"},
106 {ERR_R_MALLOC_FAILURE, "malloc failure"},
107 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
108 "called a function you should not call"},
109 {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
110 {ERR_R_INTERNAL_ERROR, "internal error"},
111 {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
112 {ERR_R_INIT_FAIL, "init fail"},
113 {ERR_R_OPERATION_FAIL, "operation fail"},
119 static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
120 static int set_err_thread_local;
121 static CRYPTO_THREAD_LOCAL err_thread_local;
123 static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
124 static CRYPTO_RWLOCK *err_string_lock;
126 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
132 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
133 static int int_err_library_number = ERR_LIB_USER;
135 typedef enum ERR_GET_ACTION_e {
136 EV_POP, EV_PEEK, EV_PEEK_LAST
139 static unsigned long get_error_values(ERR_GET_ACTION g,
140 const char **file, int *line,
141 const char **func, const char **data,
144 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
146 unsigned long ret, l;
149 ret = l ^ ERR_GET_LIB(l);
150 return (ret ^ ret % 19 * 13);
153 static int err_string_data_cmp(const ERR_STRING_DATA *a,
154 const ERR_STRING_DATA *b)
156 if (a->error == b->error)
158 return a->error > b->error ? 1 : -1;
161 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
163 ERR_STRING_DATA *p = NULL;
165 CRYPTO_THREAD_read_lock(err_string_lock);
166 p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
167 CRYPTO_THREAD_unlock(err_string_lock);
172 #ifndef OPENSSL_NO_ERR
173 /* 2019-05-21: Russian and Ukrainian locales on Linux require more than 6,5 kB */
174 # define SPACE_SYS_STR_REASONS 8 * 1024
175 # define NUM_SYS_STR_REASONS 127
177 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
179 * SYS_str_reasons is filled with copies of strerror() results at
180 * initialization. 'errno' values up to 127 should cover all usual errors,
181 * others will be displayed numerically by ERR_error_string. It is crucial
182 * that we have something for each reason code that occurs in
183 * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
184 * which always gets an errno value and never one of those 'standard' reason
188 static void build_SYS_str_reasons(void)
190 /* OPENSSL_malloc cannot be used here, use static storage instead */
191 static char strerror_pool[SPACE_SYS_STR_REASONS];
192 char *cur = strerror_pool;
196 int saveerrno = get_last_sys_error();
198 CRYPTO_THREAD_write_lock(err_string_lock);
200 CRYPTO_THREAD_unlock(err_string_lock);
204 for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
205 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
207 str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
209 * If we have used up all the space in strerror_pool,
210 * there's no point in calling openssl_strerror_r()
212 if (str->string == NULL && cnt < sizeof(strerror_pool)) {
213 if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) {
214 size_t l = strlen(cur);
221 * VMS has an unusual quirk of adding spaces at the end of
222 * some (most? all?) messages. Lets trim them off.
224 while (cur > strerror_pool && ossl_isspace(cur[-1])) {
232 if (str->string == NULL)
233 str->string = "unknown";
237 * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
238 * required by ERR_load_strings.
243 CRYPTO_THREAD_unlock(err_string_lock);
244 /* openssl_strerror_r could change errno, but we want to preserve it */
245 set_sys_error(saveerrno);
246 err_load_strings(SYS_str_reasons);
250 static void ERR_STATE_free(ERR_STATE *s)
256 for (i = 0; i < ERR_NUM_ERRORS; i++) {
257 err_clear_data(s, i, 1);
262 DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
264 if (!OPENSSL_init_crypto(0, NULL))
266 err_string_lock = CRYPTO_THREAD_lock_new();
267 if (err_string_lock == NULL)
269 int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
270 err_string_data_cmp);
271 if (int_error_hash == NULL) {
272 CRYPTO_THREAD_lock_free(err_string_lock);
273 err_string_lock = NULL;
279 void err_cleanup(void)
281 if (set_err_thread_local != 0)
282 CRYPTO_THREAD_cleanup_local(&err_thread_local);
283 CRYPTO_THREAD_lock_free(err_string_lock);
284 err_string_lock = NULL;
285 lh_ERR_STRING_DATA_free(int_error_hash);
286 int_error_hash = NULL;
290 * Legacy; pack in the library.
292 static void err_patch(int lib, ERR_STRING_DATA *str)
294 unsigned long plib = ERR_PACK(lib, 0, 0);
296 for (; str->error != 0; str++)
301 * Hash in |str| error strings. Assumes the URN_ONCE was done.
303 static int err_load_strings(const ERR_STRING_DATA *str)
305 CRYPTO_THREAD_write_lock(err_string_lock);
306 for (; str->error; str++)
307 (void)lh_ERR_STRING_DATA_insert(int_error_hash,
308 (ERR_STRING_DATA *)str);
309 CRYPTO_THREAD_unlock(err_string_lock);
313 int ERR_load_ERR_strings(void)
315 #ifndef OPENSSL_NO_ERR
316 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
319 err_load_strings(ERR_str_libraries);
320 err_load_strings(ERR_str_reasons);
321 build_SYS_str_reasons();
326 int ERR_load_strings(int lib, ERR_STRING_DATA *str)
328 if (ERR_load_ERR_strings() == 0)
332 err_load_strings(str);
336 int ERR_load_strings_const(const ERR_STRING_DATA *str)
338 if (ERR_load_ERR_strings() == 0)
340 err_load_strings(str);
344 int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
346 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
349 CRYPTO_THREAD_write_lock(err_string_lock);
351 * We don't need to ERR_PACK the lib, since that was done (to
352 * the table) when it was loaded.
354 for (; str->error; str++)
355 (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
356 CRYPTO_THREAD_unlock(err_string_lock);
361 void err_free_strings_int(void)
363 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
367 /********************************************************/
369 void ERR_clear_error(void)
374 es = err_get_state_int();
378 for (i = 0; i < ERR_NUM_ERRORS; i++) {
381 es->top = es->bottom = 0;
384 unsigned long ERR_get_error(void)
386 return get_error_values(EV_POP, NULL, NULL, NULL, NULL, NULL);
389 unsigned long ERR_get_error_line(const char **file, int *line)
391 return get_error_values(EV_POP, file, line, NULL, NULL, NULL);
394 unsigned long ERR_get_error_func(const char **func)
396 return get_error_values(EV_POP, NULL, NULL, func, NULL, NULL);
399 unsigned long ERR_get_error_data(const char **data, int *flags)
401 return get_error_values(EV_POP, NULL, NULL, NULL, data, flags);
404 unsigned long ERR_get_error_all(const char **file, int *line,
406 const char **data, int *flags)
408 return get_error_values(EV_POP, file, line, func, data, flags);
411 #ifndef OPENSSL_NO_DEPRECATED_3_0
412 unsigned long ERR_get_error_line_data(const char **file, int *line,
413 const char **data, int *flags)
415 return get_error_values(EV_POP, file, line, NULL, data, flags);
419 unsigned long ERR_peek_error(void)
421 return get_error_values(EV_PEEK, NULL, NULL, NULL, NULL, NULL);
424 unsigned long ERR_peek_error_line(const char **file, int *line)
426 return get_error_values(EV_PEEK, file, line, NULL, NULL, NULL);
429 unsigned long ERR_peek_error_func(const char **func)
431 return get_error_values(EV_PEEK, NULL, NULL, func, NULL, NULL);
434 unsigned long ERR_peek_error_data(const char **data, int *flags)
436 return get_error_values(EV_PEEK, NULL, NULL, NULL, data, flags);
439 unsigned long ERR_peek_error_all(const char **file, int *line,
441 const char **data, int *flags)
443 return get_error_values(EV_PEEK, file, line, func, data, flags);
446 #ifndef OPENSSL_NO_DEPRECATED_3_0
447 unsigned long ERR_peek_error_line_data(const char **file, int *line,
448 const char **data, int *flags)
450 return get_error_values(EV_PEEK, file, line, NULL, data, flags);
454 unsigned long ERR_peek_last_error(void)
456 return get_error_values(EV_PEEK_LAST, NULL, NULL, NULL, NULL, NULL);
459 unsigned long ERR_peek_last_error_line(const char **file, int *line)
461 return get_error_values(EV_PEEK_LAST, file, line, NULL, NULL, NULL);
464 unsigned long ERR_peek_last_error_func(const char **func)
466 return get_error_values(EV_PEEK_LAST, NULL, NULL, func, NULL, NULL);
469 unsigned long ERR_peek_last_error_data(const char **data, int *flags)
471 return get_error_values(EV_PEEK_LAST, NULL, NULL, NULL, data, flags);
474 unsigned long ERR_peek_last_error_all(const char **file, int *line,
476 const char **data, int *flags)
478 return get_error_values(EV_PEEK_LAST, file, line, func, data, flags);
481 #ifndef OPENSSL_NO_DEPRECATED_3_0
482 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
483 const char **data, int *flags)
485 return get_error_values(EV_PEEK_LAST, file, line, NULL, data, flags);
489 static unsigned long get_error_values(ERR_GET_ACTION g,
490 const char **file, int *line,
492 const char **data, int *flags)
498 es = err_get_state_int();
503 * Clear anything that should have been cleared earlier. We do this
504 * here because this doesn't have constant-time issues.
506 while (es->bottom != es->top) {
507 if (es->err_flags[es->top] & ERR_FLAG_CLEAR) {
508 err_clear(es, es->top, 0);
509 es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
512 i = (es->bottom + 1) % ERR_NUM_ERRORS;
513 if (es->err_flags[i] & ERR_FLAG_CLEAR) {
515 err_clear(es, es->bottom, 0);
521 /* If everything has been cleared, the stack is empty. */
522 if (es->bottom == es->top)
525 /* Which error, the top of stack (latest one) or the first one? */
526 if (g == EV_PEEK_LAST)
529 i = (es->bottom + 1) % ERR_NUM_ERRORS;
531 ret = es->err_buffer[i];
534 es->err_buffer[i] = 0;
538 *file = es->err_file[i];
543 *line = es->err_line[i];
545 *func = es->err_func[i];
550 *flags = es->err_data_flags[i];
553 err_clear_data(es, i, 0);
556 *data = es->err_data[i];
566 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
568 char lsbuf[64], rsbuf[64];
570 unsigned long f = 0, l, r;
576 ls = ERR_lib_error_string(e);
578 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
582 rs = ERR_reason_error_string(e);
583 r = ERR_GET_REASON(e);
585 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
589 BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, "", rs);
590 if (strlen(buf) == len - 1) {
591 /* Didn't fit; use a minimal format. */
592 BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r);
597 * ERR_error_string_n should be used instead for ret != NULL as
598 * ERR_error_string cannot know how large the buffer is
600 char *ERR_error_string(unsigned long e, char *ret)
602 static char buf[256];
606 ERR_error_string_n(e, ret, (int)sizeof(buf));
610 const char *ERR_lib_error_string(unsigned long e)
612 ERR_STRING_DATA d, *p;
615 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
620 d.error = ERR_PACK(l, 0, 0);
621 p = int_err_get_item(&d);
622 return ((p == NULL) ? NULL : p->string);
625 #ifndef OPENSSL_NO_DEPRECATED_3_0
626 const char *ERR_func_error_string(unsigned long e)
632 const char *ERR_reason_error_string(unsigned long e)
634 ERR_STRING_DATA d, *p = NULL;
637 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
642 r = ERR_GET_REASON(e);
643 d.error = ERR_PACK(l, 0, r);
644 p = int_err_get_item(&d);
646 d.error = ERR_PACK(0, 0, r);
647 p = int_err_get_item(&d);
649 return ((p == NULL) ? NULL : p->string);
652 /* TODO(3.0): arg ignored for now */
653 static void err_delete_thread_state(void *arg)
655 ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);
659 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
660 ERR_STATE_free(state);
663 #ifndef OPENSSL_NO_DEPRECATED_1_1_0
664 void ERR_remove_thread_state(void *dummy)
669 #ifndef OPENSSL_NO_DEPRECATED_1_0_0
670 void ERR_remove_state(unsigned long pid)
675 DEFINE_RUN_ONCE_STATIC(err_do_init)
677 set_err_thread_local = 1;
678 return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
681 ERR_STATE *err_get_state_int(void)
684 int saveerrno = get_last_sys_error();
686 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
689 if (!RUN_ONCE(&err_init, err_do_init))
692 state = CRYPTO_THREAD_get_local(&err_thread_local);
693 if (state == (ERR_STATE*)-1)
697 if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
700 if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) {
701 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
705 if (!ossl_init_thread_start(NULL, NULL, err_delete_thread_state)
706 || !CRYPTO_THREAD_set_local(&err_thread_local, state)) {
707 ERR_STATE_free(state);
708 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
712 /* Ignore failures from these */
713 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
716 set_sys_error(saveerrno);
720 #ifndef OPENSSL_NO_DEPRECATED_3_0
721 ERR_STATE *ERR_get_state(void)
723 return err_get_state_int();
729 * err_shelve_state returns the current thread local error state
730 * and freezes the error module until err_unshelve_state is called.
732 int err_shelve_state(void **state)
734 int saveerrno = get_last_sys_error();
737 * Note, at present our only caller is OPENSSL_init_crypto(), indirectly
738 * via ossl_init_load_crypto_nodelete(), by which point the requested
739 * "base" initialization has already been performed, so the below call is a
740 * NOOP, that re-enters OPENSSL_init_crypto() only to quickly return.
742 * If are no other valid callers of this function, the call below can be
743 * removed, avoiding the re-entry into OPENSSL_init_crypto(). If there are
744 * potential uses that are not from inside OPENSSL_init_crypto(), then this
745 * call is needed, but some care is required to make sure that the re-entry
748 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
751 if (!RUN_ONCE(&err_init, err_do_init))
754 *state = CRYPTO_THREAD_get_local(&err_thread_local);
755 if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
758 set_sys_error(saveerrno);
763 * err_unshelve_state restores the error state that was returned
764 * by err_shelve_state previously.
766 void err_unshelve_state(void* state)
768 if (state != (void*)-1)
769 CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state);
772 int ERR_get_next_error_library(void)
776 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
779 CRYPTO_THREAD_write_lock(err_string_lock);
780 ret = int_err_library_number++;
781 CRYPTO_THREAD_unlock(err_string_lock);
785 static int err_set_error_data_int(char *data, size_t size, int flags,
790 es = err_get_state_int();
794 err_clear_data(es, es->top, deallocate);
795 err_set_data(es, es->top, data, size, flags);
800 void ERR_set_error_data(char *data, int flags)
803 * This function is void so we cannot propagate the error return. Since it
804 * is also in the public API we can't change the return type.
806 * We estimate the size of the data. If it's not flagged as allocated,
807 * then this is safe, and if it is flagged as allocated, then our size
808 * may be smaller than the actual allocation, but that doesn't matter
809 * too much, the buffer will remain untouched or will eventually be
810 * reallocated to a new size.
812 * callers should be advised that this function takes over ownership of
813 * the allocated memory, i.e. they can't count on the pointer to remain
816 err_set_error_data_int(data, strlen(data) + 1, flags, 1);
819 void ERR_add_error_data(int num, ...)
823 ERR_add_error_vdata(num, args);
827 void ERR_add_error_vdata(int num, va_list args)
830 int flags = ERR_TXT_MALLOCED | ERR_TXT_STRING;
834 /* Get the current error data; if an allocated string get it. */
835 es = err_get_state_int();
841 * If err_data is allocated already, re-use the space.
842 * Otherwise, allocate a small new buffer.
844 if ((es->err_data_flags[i] & flags) == flags) {
845 str = es->err_data[i];
846 size = es->err_data_size[i];
849 * To protect the string we just grabbed from tampering by other
850 * functions we may call, or to protect them from freeing a pointer
851 * that may no longer be valid at that point, we clear away the
852 * data pointer and the flags. We will set them again at the end
855 es->err_data[i] = NULL;
856 es->err_data_flags[i] = 0;
857 } else if ((str = OPENSSL_malloc(size = 81)) == NULL) {
865 arg = va_arg(args, char *);
873 p = OPENSSL_realloc(str, size);
880 OPENSSL_strlcat(str, arg, (size_t)size);
882 if (!err_set_error_data_int(str, size, flags, 0))
886 int ERR_set_mark(void)
890 es = err_get_state_int();
894 if (es->bottom == es->top)
896 es->err_flags[es->top] |= ERR_FLAG_MARK;
900 int ERR_pop_to_mark(void)
904 es = err_get_state_int();
908 while (es->bottom != es->top
909 && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
910 err_clear(es, es->top, 0);
911 es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
914 if (es->bottom == es->top)
916 es->err_flags[es->top] &= ~ERR_FLAG_MARK;
920 int ERR_clear_last_mark(void)
925 es = err_get_state_int();
930 while (es->bottom != top
931 && (es->err_flags[top] & ERR_FLAG_MARK) == 0) {
932 top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
935 if (es->bottom == top)
937 es->err_flags[top] &= ~ERR_FLAG_MARK;
941 void err_clear_last_constant_time(int clear)
946 es = err_get_state_int();
953 * Flag error as cleared but remove it elsewhere to avoid two errors
954 * accessing the same error stack location, revealing timing information.
956 clear = constant_time_select_int(constant_time_eq_int(clear, 0),
958 es->err_flags[top] |= clear;