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
13 #include "internal/cryptlib_int.h"
14 #include "internal/err.h"
15 #include "internal/err_int.h"
16 #include <openssl/err.h>
17 #include <openssl/crypto.h>
18 #include <openssl/buffer.h>
19 #include <openssl/bio.h>
20 #include <openssl/opensslconf.h>
21 #include "internal/thread_once.h"
22 #include "internal/ctype.h"
23 #include "internal/constant_time_locl.h"
27 static int err_load_strings(const ERR_STRING_DATA
*str
);
29 static void ERR_STATE_free(ERR_STATE
*s
);
30 #ifndef OPENSSL_NO_ERR
31 static ERR_STRING_DATA ERR_str_libraries
[] = {
32 {ERR_PACK(ERR_LIB_NONE
, 0, 0), "unknown library"},
33 {ERR_PACK(ERR_LIB_SYS
, 0, 0), "system library"},
34 {ERR_PACK(ERR_LIB_BN
, 0, 0), "bignum routines"},
35 {ERR_PACK(ERR_LIB_RSA
, 0, 0), "rsa routines"},
36 {ERR_PACK(ERR_LIB_DH
, 0, 0), "Diffie-Hellman routines"},
37 {ERR_PACK(ERR_LIB_EVP
, 0, 0), "digital envelope routines"},
38 {ERR_PACK(ERR_LIB_BUF
, 0, 0), "memory buffer routines"},
39 {ERR_PACK(ERR_LIB_OBJ
, 0, 0), "object identifier routines"},
40 {ERR_PACK(ERR_LIB_PEM
, 0, 0), "PEM routines"},
41 {ERR_PACK(ERR_LIB_DSA
, 0, 0), "dsa routines"},
42 {ERR_PACK(ERR_LIB_X509
, 0, 0), "x509 certificate routines"},
43 {ERR_PACK(ERR_LIB_ASN1
, 0, 0), "asn1 encoding routines"},
44 {ERR_PACK(ERR_LIB_CONF
, 0, 0), "configuration file routines"},
45 {ERR_PACK(ERR_LIB_CRYPTO
, 0, 0), "common libcrypto routines"},
46 {ERR_PACK(ERR_LIB_EC
, 0, 0), "elliptic curve routines"},
47 {ERR_PACK(ERR_LIB_ECDSA
, 0, 0), "ECDSA routines"},
48 {ERR_PACK(ERR_LIB_ECDH
, 0, 0), "ECDH routines"},
49 {ERR_PACK(ERR_LIB_SSL
, 0, 0), "SSL routines"},
50 {ERR_PACK(ERR_LIB_BIO
, 0, 0), "BIO routines"},
51 {ERR_PACK(ERR_LIB_PKCS7
, 0, 0), "PKCS7 routines"},
52 {ERR_PACK(ERR_LIB_X509V3
, 0, 0), "X509 V3 routines"},
53 {ERR_PACK(ERR_LIB_PKCS12
, 0, 0), "PKCS12 routines"},
54 {ERR_PACK(ERR_LIB_RAND
, 0, 0), "random number generator"},
55 {ERR_PACK(ERR_LIB_DSO
, 0, 0), "DSO support routines"},
56 {ERR_PACK(ERR_LIB_TS
, 0, 0), "time stamp routines"},
57 {ERR_PACK(ERR_LIB_ENGINE
, 0, 0), "engine routines"},
58 {ERR_PACK(ERR_LIB_OCSP
, 0, 0), "OCSP routines"},
59 {ERR_PACK(ERR_LIB_UI
, 0, 0), "UI routines"},
60 {ERR_PACK(ERR_LIB_FIPS
, 0, 0), "FIPS routines"},
61 {ERR_PACK(ERR_LIB_CMS
, 0, 0), "CMS routines"},
62 {ERR_PACK(ERR_LIB_CRMF
, 0, 0), "CRMF routines"},
63 {ERR_PACK(ERR_LIB_CMP
, 0, 0), "CMP routines"},
64 {ERR_PACK(ERR_LIB_HMAC
, 0, 0), "HMAC routines"},
65 {ERR_PACK(ERR_LIB_CT
, 0, 0), "CT routines"},
66 {ERR_PACK(ERR_LIB_ASYNC
, 0, 0), "ASYNC routines"},
67 {ERR_PACK(ERR_LIB_KDF
, 0, 0), "KDF routines"},
68 {ERR_PACK(ERR_LIB_OSSL_STORE
, 0, 0), "STORE routines"},
69 {ERR_PACK(ERR_LIB_SM2
, 0, 0), "SM2 routines"},
70 {ERR_PACK(ERR_LIB_ESS
, 0, 0), "ESS routines"},
71 {ERR_PACK(ERR_LIB_PROV
, 0, 0), "Provider routines"},
75 static ERR_STRING_DATA ERR_str_reasons
[] = {
76 {ERR_R_SYS_LIB
, "system lib"},
77 {ERR_R_BN_LIB
, "BN lib"},
78 {ERR_R_RSA_LIB
, "RSA lib"},
79 {ERR_R_DH_LIB
, "DH lib"},
80 {ERR_R_EVP_LIB
, "EVP lib"},
81 {ERR_R_BUF_LIB
, "BUF lib"},
82 {ERR_R_OBJ_LIB
, "OBJ lib"},
83 {ERR_R_PEM_LIB
, "PEM lib"},
84 {ERR_R_DSA_LIB
, "DSA lib"},
85 {ERR_R_X509_LIB
, "X509 lib"},
86 {ERR_R_ASN1_LIB
, "ASN1 lib"},
87 {ERR_R_EC_LIB
, "EC lib"},
88 {ERR_R_BIO_LIB
, "BIO lib"},
89 {ERR_R_PKCS7_LIB
, "PKCS7 lib"},
90 {ERR_R_X509V3_LIB
, "X509V3 lib"},
91 {ERR_R_ENGINE_LIB
, "ENGINE lib"},
92 {ERR_R_UI_LIB
, "UI lib"},
93 {ERR_R_OSSL_STORE_LIB
, "STORE lib"},
94 {ERR_R_ECDSA_LIB
, "ECDSA lib"},
96 {ERR_R_NESTED_ASN1_ERROR
, "nested asn1 error"},
97 {ERR_R_MISSING_ASN1_EOS
, "missing asn1 eos"},
99 {ERR_R_FATAL
, "fatal"},
100 {ERR_R_MALLOC_FAILURE
, "malloc failure"},
101 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED
,
102 "called a function you should not call"},
103 {ERR_R_PASSED_NULL_PARAMETER
, "passed a null parameter"},
104 {ERR_R_INTERNAL_ERROR
, "internal error"},
105 {ERR_R_DISABLED
, "called a function that was disabled at compile-time"},
106 {ERR_R_INIT_FAIL
, "init fail"},
107 {ERR_R_OPERATION_FAIL
, "operation fail"},
113 static CRYPTO_ONCE err_init
= CRYPTO_ONCE_STATIC_INIT
;
114 static int set_err_thread_local
;
115 static CRYPTO_THREAD_LOCAL err_thread_local
;
117 static CRYPTO_ONCE err_string_init
= CRYPTO_ONCE_STATIC_INIT
;
118 static CRYPTO_RWLOCK
*err_string_lock
;
120 static ERR_STRING_DATA
*int_err_get_item(const ERR_STRING_DATA
*);
126 static LHASH_OF(ERR_STRING_DATA
) *int_error_hash
= NULL
;
127 static int int_err_library_number
= ERR_LIB_USER
;
129 static unsigned long get_error_values(int inc
, int top
, const char **file
,
130 int *line
, const char **data
,
133 static unsigned long err_string_data_hash(const ERR_STRING_DATA
*a
)
135 unsigned long ret
, l
;
138 ret
= l
^ ERR_GET_LIB(l
);
139 return (ret
^ ret
% 19 * 13);
142 static int err_string_data_cmp(const ERR_STRING_DATA
*a
,
143 const ERR_STRING_DATA
*b
)
145 if (a
->error
== b
->error
)
147 return a
->error
> b
->error
? 1 : -1;
150 static ERR_STRING_DATA
*int_err_get_item(const ERR_STRING_DATA
*d
)
152 ERR_STRING_DATA
*p
= NULL
;
154 CRYPTO_THREAD_read_lock(err_string_lock
);
155 p
= lh_ERR_STRING_DATA_retrieve(int_error_hash
, d
);
156 CRYPTO_THREAD_unlock(err_string_lock
);
161 #ifndef OPENSSL_NO_ERR
162 /* 2019-05-21: Russian and Ukrainian locales on Linux require more than 6,5 kB */
163 # define SPACE_SYS_STR_REASONS 8 * 1024
164 # define NUM_SYS_STR_REASONS 127
166 static ERR_STRING_DATA SYS_str_reasons
[NUM_SYS_STR_REASONS
+ 1];
168 * SYS_str_reasons is filled with copies of strerror() results at
169 * initialization. 'errno' values up to 127 should cover all usual errors,
170 * others will be displayed numerically by ERR_error_string. It is crucial
171 * that we have something for each reason code that occurs in
172 * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
173 * which always gets an errno value and never one of those 'standard' reason
177 static void build_SYS_str_reasons(void)
179 /* OPENSSL_malloc cannot be used here, use static storage instead */
180 static char strerror_pool
[SPACE_SYS_STR_REASONS
];
181 char *cur
= strerror_pool
;
185 int saveerrno
= get_last_sys_error();
187 CRYPTO_THREAD_write_lock(err_string_lock
);
189 CRYPTO_THREAD_unlock(err_string_lock
);
193 for (i
= 1; i
<= NUM_SYS_STR_REASONS
; i
++) {
194 ERR_STRING_DATA
*str
= &SYS_str_reasons
[i
- 1];
196 str
->error
= ERR_PACK(ERR_LIB_SYS
, 0, i
);
198 * If we have used up all the space in strerror_pool,
199 * there's no point in calling openssl_strerror_r()
201 if (str
->string
== NULL
&& cnt
< sizeof(strerror_pool
)) {
202 if (openssl_strerror_r(i
, cur
, sizeof(strerror_pool
) - cnt
)) {
203 size_t l
= strlen(cur
);
210 * VMS has an unusual quirk of adding spaces at the end of
211 * some (most? all?) messages. Lets trim them off.
213 while (cur
> strerror_pool
&& ossl_isspace(cur
[-1])) {
221 if (str
->string
== NULL
)
222 str
->string
= "unknown";
226 * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
227 * required by ERR_load_strings.
232 CRYPTO_THREAD_unlock(err_string_lock
);
233 /* openssl_strerror_r could change errno, but we want to preserve it */
234 set_sys_error(saveerrno
);
235 err_load_strings(SYS_str_reasons
);
239 static void ERR_STATE_free(ERR_STATE
*s
)
245 for (i
= 0; i
< ERR_NUM_ERRORS
; i
++) {
246 err_clear_data(s
, i
, 1);
251 DEFINE_RUN_ONCE_STATIC(do_err_strings_init
)
253 if (!OPENSSL_init_crypto(0, NULL
))
255 err_string_lock
= CRYPTO_THREAD_lock_new();
256 if (err_string_lock
== NULL
)
258 int_error_hash
= lh_ERR_STRING_DATA_new(err_string_data_hash
,
259 err_string_data_cmp
);
260 if (int_error_hash
== NULL
) {
261 CRYPTO_THREAD_lock_free(err_string_lock
);
262 err_string_lock
= NULL
;
268 void err_cleanup(void)
270 if (set_err_thread_local
!= 0)
271 CRYPTO_THREAD_cleanup_local(&err_thread_local
);
272 CRYPTO_THREAD_lock_free(err_string_lock
);
273 err_string_lock
= NULL
;
274 lh_ERR_STRING_DATA_free(int_error_hash
);
275 int_error_hash
= NULL
;
279 * Legacy; pack in the library.
281 static void err_patch(int lib
, ERR_STRING_DATA
*str
)
283 unsigned long plib
= ERR_PACK(lib
, 0, 0);
285 for (; str
->error
!= 0; str
++)
290 * Hash in |str| error strings. Assumes the URN_ONCE was done.
292 static int err_load_strings(const ERR_STRING_DATA
*str
)
294 CRYPTO_THREAD_write_lock(err_string_lock
);
295 for (; str
->error
; str
++)
296 (void)lh_ERR_STRING_DATA_insert(int_error_hash
,
297 (ERR_STRING_DATA
*)str
);
298 CRYPTO_THREAD_unlock(err_string_lock
);
302 int ERR_load_ERR_strings(void)
304 #ifndef OPENSSL_NO_ERR
305 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
))
308 err_load_strings(ERR_str_libraries
);
309 err_load_strings(ERR_str_reasons
);
310 build_SYS_str_reasons();
315 int ERR_load_strings(int lib
, ERR_STRING_DATA
*str
)
317 if (ERR_load_ERR_strings() == 0)
321 err_load_strings(str
);
325 int ERR_load_strings_const(const ERR_STRING_DATA
*str
)
327 if (ERR_load_ERR_strings() == 0)
329 err_load_strings(str
);
333 int ERR_unload_strings(int lib
, ERR_STRING_DATA
*str
)
335 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
))
338 CRYPTO_THREAD_write_lock(err_string_lock
);
340 * We don't need to ERR_PACK the lib, since that was done (to
341 * the table) when it was loaded.
343 for (; str
->error
; str
++)
344 (void)lh_ERR_STRING_DATA_delete(int_error_hash
, str
);
345 CRYPTO_THREAD_unlock(err_string_lock
);
350 void err_free_strings_int(void)
352 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
))
356 /********************************************************/
358 void ERR_put_func_error(int lib
, const char *func
, int reason
,
359 const char *file
, int line
)
361 ERR_put_error(lib
, 0, reason
, file
, line
);
362 ERR_add_error_data(2, "calling function ", func
);
365 void ERR_put_error(int lib
, int func
, int reason
, const char *file
, int line
)
371 * In the BS2000-OSD POSIX subsystem, the compiler generates path names
372 * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
373 * something sensible. @@@ We shouldn't modify a const string, though.
375 if (strncmp(file
, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
378 /* Skip the "*POSIX(" prefix */
379 file
+= sizeof("*POSIX(") - 1;
380 end
= &file
[strlen(file
) - 1];
383 /* Optional: use the basename of the path only. */
384 if ((end
= strrchr(file
, '/')) != NULL
)
388 es
= ERR_get_state();
393 err_clear(es
, es
->top
, 0);
396 void ERR_clear_error(void)
401 es
= ERR_get_state();
405 for (i
= 0; i
< ERR_NUM_ERRORS
; i
++) {
408 es
->top
= es
->bottom
= 0;
411 unsigned long ERR_get_error(void)
413 return get_error_values(1, 0, NULL
, NULL
, NULL
, NULL
);
416 unsigned long ERR_get_error_line(const char **file
, int *line
)
418 return get_error_values(1, 0, file
, line
, NULL
, NULL
);
421 unsigned long ERR_get_error_line_data(const char **file
, int *line
,
422 const char **data
, int *flags
)
424 return get_error_values(1, 0, file
, line
, data
, flags
);
427 unsigned long ERR_peek_error(void)
429 return get_error_values(0, 0, NULL
, NULL
, NULL
, NULL
);
432 unsigned long ERR_peek_error_line(const char **file
, int *line
)
434 return get_error_values(0, 0, file
, line
, NULL
, NULL
);
437 unsigned long ERR_peek_error_line_data(const char **file
, int *line
,
438 const char **data
, int *flags
)
440 return get_error_values(0, 0, file
, line
, data
, flags
);
443 unsigned long ERR_peek_last_error(void)
445 return get_error_values(0, 1, NULL
, NULL
, NULL
, NULL
);
448 unsigned long ERR_peek_last_error_line(const char **file
, int *line
)
450 return get_error_values(0, 1, file
, line
, NULL
, NULL
);
453 unsigned long ERR_peek_last_error_line_data(const char **file
, int *line
,
454 const char **data
, int *flags
)
456 return get_error_values(0, 1, file
, line
, data
, flags
);
459 static unsigned long get_error_values(int inc
, int top
, const char **file
,
460 int *line
, const char **data
,
467 es
= ERR_get_state();
481 return ERR_R_INTERNAL_ERROR
;
484 while (es
->bottom
!= es
->top
) {
485 if (es
->err_flags
[es
->top
] & ERR_FLAG_CLEAR
) {
486 err_clear(es
, es
->top
, 0);
487 es
->top
= es
->top
> 0 ? es
->top
- 1 : ERR_NUM_ERRORS
- 1;
490 i
= (es
->bottom
+ 1) % ERR_NUM_ERRORS
;
491 if (es
->err_flags
[i
] & ERR_FLAG_CLEAR
) {
493 err_clear(es
, es
->bottom
, 0);
499 if (es
->bottom
== es
->top
)
503 i
= es
->top
; /* last error */
505 i
= (es
->bottom
+ 1) % ERR_NUM_ERRORS
; /* first error */
507 ret
= es
->err_buffer
[i
];
510 es
->err_buffer
[i
] = 0;
513 if (file
!= NULL
&& line
!= NULL
) {
514 if (es
->err_file
[i
] == NULL
) {
518 *file
= es
->err_file
[i
];
519 *line
= es
->err_line
[i
];
525 err_clear_data(es
, i
, 0);
528 if (es
->err_data
[i
] == NULL
) {
533 *data
= es
->err_data
[i
];
535 *flags
= es
->err_data_flags
[i
];
541 void ERR_error_string_n(unsigned long e
, char *buf
, size_t len
)
543 char lsbuf
[64], rsbuf
[64];
545 unsigned long f
= 0, l
, r
;
551 ls
= ERR_lib_error_string(e
);
553 BIO_snprintf(lsbuf
, sizeof(lsbuf
), "lib(%lu)", l
);
557 rs
= ERR_reason_error_string(e
);
558 r
= ERR_GET_REASON(e
);
560 BIO_snprintf(rsbuf
, sizeof(rsbuf
), "reason(%lu)", r
);
564 BIO_snprintf(buf
, len
, "error:%08lX:%s:%s:%s", e
, ls
, "", rs
);
565 if (strlen(buf
) == len
- 1) {
566 /* Didn't fit; use a minimal format. */
567 BIO_snprintf(buf
, len
, "err:%lx:%lx:%lx:%lx", e
, l
, f
, r
);
572 * ERR_error_string_n should be used instead for ret != NULL as
573 * ERR_error_string cannot know how large the buffer is
575 char *ERR_error_string(unsigned long e
, char *ret
)
577 static char buf
[256];
581 ERR_error_string_n(e
, ret
, (int)sizeof(buf
));
585 const char *ERR_lib_error_string(unsigned long e
)
587 ERR_STRING_DATA d
, *p
;
590 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
)) {
595 d
.error
= ERR_PACK(l
, 0, 0);
596 p
= int_err_get_item(&d
);
597 return ((p
== NULL
) ? NULL
: p
->string
);
600 const char *ERR_func_error_string(unsigned long e
)
602 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
))
604 return ERR_GET_LIB(e
) == ERR_LIB_SYS
? "system library" : NULL
;
607 const char *ERR_reason_error_string(unsigned long e
)
609 ERR_STRING_DATA d
, *p
= NULL
;
612 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
)) {
617 r
= ERR_GET_REASON(e
);
618 d
.error
= ERR_PACK(l
, 0, r
);
619 p
= int_err_get_item(&d
);
621 d
.error
= ERR_PACK(0, 0, r
);
622 p
= int_err_get_item(&d
);
624 return ((p
== NULL
) ? NULL
: p
->string
);
627 /* TODO(3.0): arg ignored for now */
628 static void err_delete_thread_state(void *arg
)
630 ERR_STATE
*state
= CRYPTO_THREAD_get_local(&err_thread_local
);
634 CRYPTO_THREAD_set_local(&err_thread_local
, NULL
);
635 ERR_STATE_free(state
);
638 #if !OPENSSL_API_1_1_0
639 void ERR_remove_thread_state(void *dummy
)
644 #if !OPENSSL_API_1_0_0
645 void ERR_remove_state(unsigned long pid
)
650 DEFINE_RUN_ONCE_STATIC(err_do_init
)
652 set_err_thread_local
= 1;
653 return CRYPTO_THREAD_init_local(&err_thread_local
, NULL
);
656 ERR_STATE
*ERR_get_state(void)
659 int saveerrno
= get_last_sys_error();
661 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY
, NULL
))
664 if (!RUN_ONCE(&err_init
, err_do_init
))
667 state
= CRYPTO_THREAD_get_local(&err_thread_local
);
668 if (state
== (ERR_STATE
*)-1)
672 if (!CRYPTO_THREAD_set_local(&err_thread_local
, (ERR_STATE
*)-1))
675 if ((state
= OPENSSL_zalloc(sizeof(*state
))) == NULL
) {
676 CRYPTO_THREAD_set_local(&err_thread_local
, NULL
);
680 if (!ossl_init_thread_start(NULL
, NULL
, err_delete_thread_state
)
681 || !CRYPTO_THREAD_set_local(&err_thread_local
, state
)) {
682 ERR_STATE_free(state
);
683 CRYPTO_THREAD_set_local(&err_thread_local
, NULL
);
687 /* Ignore failures from these */
688 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS
, NULL
);
691 set_sys_error(saveerrno
);
696 * err_shelve_state returns the current thread local error state
697 * and freezes the error module until err_unshelve_state is called.
699 int err_shelve_state(void **state
)
701 int saveerrno
= get_last_sys_error();
704 * Note, at present our only caller is OPENSSL_init_crypto(), indirectly
705 * via ossl_init_load_crypto_nodelete(), by which point the requested
706 * "base" initialization has already been performed, so the below call is a
707 * NOOP, that re-enters OPENSSL_init_crypto() only to quickly return.
709 * If are no other valid callers of this function, the call below can be
710 * removed, avoiding the re-entry into OPENSSL_init_crypto(). If there are
711 * potential uses that are not from inside OPENSSL_init_crypto(), then this
712 * call is needed, but some care is required to make sure that the re-entry
715 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY
, NULL
))
718 if (!RUN_ONCE(&err_init
, err_do_init
))
721 *state
= CRYPTO_THREAD_get_local(&err_thread_local
);
722 if (!CRYPTO_THREAD_set_local(&err_thread_local
, (ERR_STATE
*)-1))
725 set_sys_error(saveerrno
);
730 * err_unshelve_state restores the error state that was returned
731 * by err_shelve_state previously.
733 void err_unshelve_state(void* state
)
735 if (state
!= (void*)-1)
736 CRYPTO_THREAD_set_local(&err_thread_local
, (ERR_STATE
*)state
);
739 int ERR_get_next_error_library(void)
743 if (!RUN_ONCE(&err_string_init
, do_err_strings_init
))
746 CRYPTO_THREAD_write_lock(err_string_lock
);
747 ret
= int_err_library_number
++;
748 CRYPTO_THREAD_unlock(err_string_lock
);
752 static int err_set_error_data_int(char *data
, size_t size
, int flags
,
757 es
= ERR_get_state();
761 err_clear_data(es
, es
->top
, deallocate
);
762 err_set_data(es
, es
->top
, data
, size
, flags
);
767 void ERR_set_error_data(char *data
, int flags
)
770 * This function is void so we cannot propagate the error return. Since it
771 * is also in the public API we can't change the return type.
773 * We estimate the size of the data. If it's not flagged as allocated,
774 * then this is safe, and if it is flagged as allocated, then our size
775 * may be smaller than the actual allocation, but that doesn't matter
776 * too much, the buffer will remain untouched or will eventually be
777 * reallocated to a new size.
779 * callers should be advised that this function takes over ownership of
780 * the allocated memory, i.e. they can't count on the pointer to remain
783 err_set_error_data_int(data
, strlen(data
) + 1, flags
, 1);
786 void ERR_add_error_data(int num
, ...)
790 ERR_add_error_vdata(num
, args
);
794 void ERR_add_error_vdata(int num
, va_list args
)
797 int flags
= ERR_TXT_MALLOCED
| ERR_TXT_STRING
;
801 /* Get the current error data; if an allocated string get it. */
802 es
= ERR_get_state();
808 * If err_data is allocated already, re-use the space.
809 * Otherwise, allocate a small new buffer.
811 if ((es
->err_data_flags
[i
] & flags
) == flags
) {
812 str
= es
->err_data
[i
];
813 size
= es
->err_data_size
[i
];
816 * To protect the string we just grabbed from tampering by other
817 * functions we may call, or to protect them from freeing a pointer
818 * that may no longer be valid at that point, we clear away the
819 * data pointer and the flags. We will set them again at the end
822 es
->err_data
[i
] = NULL
;
823 es
->err_data_flags
[i
] = 0;
824 } else if ((str
= OPENSSL_malloc(size
= 81)) == NULL
) {
831 for (len
= 0; --num
>= 0; ) {
832 arg
= va_arg(args
, char *);
840 p
= OPENSSL_realloc(str
, size
+ 1);
847 OPENSSL_strlcat(str
, arg
, (size_t)size
+ 1);
849 if (!err_set_error_data_int(str
, size
, flags
, 0))
853 int ERR_set_mark(void)
857 es
= ERR_get_state();
861 if (es
->bottom
== es
->top
)
863 es
->err_flags
[es
->top
] |= ERR_FLAG_MARK
;
867 int ERR_pop_to_mark(void)
871 es
= ERR_get_state();
875 while (es
->bottom
!= es
->top
876 && (es
->err_flags
[es
->top
] & ERR_FLAG_MARK
) == 0) {
877 err_clear(es
, es
->top
, 0);
878 es
->top
= es
->top
> 0 ? es
->top
- 1 : ERR_NUM_ERRORS
- 1;
881 if (es
->bottom
== es
->top
)
883 es
->err_flags
[es
->top
] &= ~ERR_FLAG_MARK
;
887 int ERR_clear_last_mark(void)
892 es
= ERR_get_state();
897 while (es
->bottom
!= top
898 && (es
->err_flags
[top
] & ERR_FLAG_MARK
) == 0) {
899 top
= top
> 0 ? top
- 1 : ERR_NUM_ERRORS
- 1;
902 if (es
->bottom
== top
)
904 es
->err_flags
[top
] &= ~ERR_FLAG_MARK
;
908 void err_clear_last_constant_time(int clear
)
913 es
= ERR_get_state();
920 * Flag error as cleared but remove it elsewhere to avoid two errors
921 * accessing the same error stack location, revealing timing information.
923 clear
= constant_time_select_int(constant_time_eq_int(clear
, 0),
925 es
->err_flags
[top
] |= clear
;