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"
26 static int err_load_strings(const ERR_STRING_DATA *str);
28 static void ERR_STATE_free(ERR_STATE *s);
29 #ifndef OPENSSL_NO_ERR
30 static ERR_STRING_DATA ERR_str_libraries[] = {
31 {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
32 {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
33 {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
34 {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
35 {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
36 {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
37 {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
38 {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
39 {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
40 {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
41 {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
42 {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
43 {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
44 {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
45 {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
46 {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
47 {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
48 {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
49 {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
50 {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
51 {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
52 {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
53 {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
54 {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
55 {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
56 {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
57 {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
58 {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
59 {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
60 {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
61 {ERR_PACK(ERR_LIB_CRMF, 0, 0), "CRMF routines"},
62 {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
63 {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
64 {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
65 {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
66 {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},
67 {ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"},
68 {ERR_PACK(ERR_LIB_ESS, 0, 0), "ESS routines"},
69 {ERR_PACK(ERR_LIB_PROV, 0, 0), "Provider routines"},
73 static ERR_STRING_DATA ERR_str_functs[] = {
74 {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
75 {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
76 {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
77 {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
78 {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
79 {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
80 {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
81 {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
82 # ifdef OPENSSL_SYS_WINDOWS
83 {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
85 {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
86 {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
87 {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
88 {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
89 {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
90 {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
91 {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
92 {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
93 {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
94 {ERR_PACK(0, SYS_F_OPEN, 0), "open"},
95 {ERR_PACK(0, SYS_F_CLOSE, 0), "close"},
96 {ERR_PACK(0, SYS_F_IOCTL, 0), "ioctl"},
97 {ERR_PACK(0, SYS_F_STAT, 0), "stat"},
98 {ERR_PACK(0, SYS_F_FCNTL, 0), "fcntl"},
99 {ERR_PACK(0, SYS_F_FSTAT, 0), "fstat"},
103 static ERR_STRING_DATA ERR_str_reasons[] = {
104 {ERR_R_SYS_LIB, "system lib"},
105 {ERR_R_BN_LIB, "BN lib"},
106 {ERR_R_RSA_LIB, "RSA lib"},
107 {ERR_R_DH_LIB, "DH lib"},
108 {ERR_R_EVP_LIB, "EVP lib"},
109 {ERR_R_BUF_LIB, "BUF lib"},
110 {ERR_R_OBJ_LIB, "OBJ lib"},
111 {ERR_R_PEM_LIB, "PEM lib"},
112 {ERR_R_DSA_LIB, "DSA lib"},
113 {ERR_R_X509_LIB, "X509 lib"},
114 {ERR_R_ASN1_LIB, "ASN1 lib"},
115 {ERR_R_EC_LIB, "EC lib"},
116 {ERR_R_BIO_LIB, "BIO lib"},
117 {ERR_R_PKCS7_LIB, "PKCS7 lib"},
118 {ERR_R_X509V3_LIB, "X509V3 lib"},
119 {ERR_R_ENGINE_LIB, "ENGINE lib"},
120 {ERR_R_UI_LIB, "UI lib"},
121 {ERR_R_OSSL_STORE_LIB, "STORE lib"},
122 {ERR_R_ECDSA_LIB, "ECDSA lib"},
124 {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
125 {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
127 {ERR_R_FATAL, "fatal"},
128 {ERR_R_MALLOC_FAILURE, "malloc failure"},
129 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
130 "called a function you should not call"},
131 {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
132 {ERR_R_INTERNAL_ERROR, "internal error"},
133 {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
134 {ERR_R_INIT_FAIL, "init fail"},
135 {ERR_R_OPERATION_FAIL, "operation fail"},
141 static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
142 static int set_err_thread_local;
143 static CRYPTO_THREAD_LOCAL err_thread_local;
145 static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
146 static CRYPTO_RWLOCK *err_string_lock;
148 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
154 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
155 static int int_err_library_number = ERR_LIB_USER;
157 static unsigned long get_error_values(int inc, int top, const char **file,
158 int *line, const char **data,
161 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
163 unsigned long ret, l;
166 ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
167 return (ret ^ ret % 19 * 13);
170 static int err_string_data_cmp(const ERR_STRING_DATA *a,
171 const ERR_STRING_DATA *b)
173 if (a->error == b->error)
175 return a->error > b->error ? 1 : -1;
178 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
180 ERR_STRING_DATA *p = NULL;
182 CRYPTO_THREAD_read_lock(err_string_lock);
183 p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
184 CRYPTO_THREAD_unlock(err_string_lock);
189 #ifndef OPENSSL_NO_ERR
190 /* A measurement on Linux 2018-11-21 showed about 3.5kib */
191 # define SPACE_SYS_STR_REASONS 4 * 1024
192 # define NUM_SYS_STR_REASONS 127
194 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
196 * SYS_str_reasons is filled with copies of strerror() results at
197 * initialization. 'errno' values up to 127 should cover all usual errors,
198 * others will be displayed numerically by ERR_error_string. It is crucial
199 * that we have something for each reason code that occurs in
200 * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
201 * which always gets an errno value and never one of those 'standard' reason
205 static void build_SYS_str_reasons(void)
207 /* OPENSSL_malloc cannot be used here, use static storage instead */
208 static char strerror_pool[SPACE_SYS_STR_REASONS];
209 char *cur = strerror_pool;
213 int saveerrno = get_last_sys_error();
215 CRYPTO_THREAD_write_lock(err_string_lock);
217 CRYPTO_THREAD_unlock(err_string_lock);
221 for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
222 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
224 str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
225 if (str->string == NULL) {
226 if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) {
227 size_t l = strlen(cur);
231 if (cnt > sizeof(strerror_pool))
232 cnt = sizeof(strerror_pool);
236 * VMS has an unusual quirk of adding spaces at the end of
237 * some (most? all?) messages. Lets trim them off.
239 while (ossl_isspace(cur[-1])) {
247 if (str->string == NULL)
248 str->string = "unknown";
252 * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
253 * required by ERR_load_strings.
258 CRYPTO_THREAD_unlock(err_string_lock);
259 /* openssl_strerror_r could change errno, but we want to preserve it */
260 set_sys_error(saveerrno);
261 err_load_strings(SYS_str_reasons);
265 #define err_clear_data(p, i) \
267 if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) {\
268 OPENSSL_free((p)->err_data[i]); \
269 (p)->err_data[i] = NULL; \
271 (p)->err_data_flags[i] = 0; \
274 #define err_clear(p, i) \
276 err_clear_data(p, i); \
277 (p)->err_flags[i] = 0; \
278 (p)->err_buffer[i] = 0; \
279 (p)->err_file[i] = NULL; \
280 (p)->err_line[i] = -1; \
283 static void ERR_STATE_free(ERR_STATE *s)
289 for (i = 0; i < ERR_NUM_ERRORS; i++) {
290 err_clear_data(s, i);
295 DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
297 if (!OPENSSL_init_crypto(0, NULL))
299 err_string_lock = CRYPTO_THREAD_lock_new();
300 if (err_string_lock == NULL)
302 int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
303 err_string_data_cmp);
304 if (int_error_hash == NULL) {
305 CRYPTO_THREAD_lock_free(err_string_lock);
306 err_string_lock = NULL;
312 void err_cleanup(void)
314 if (set_err_thread_local != 0)
315 CRYPTO_THREAD_cleanup_local(&err_thread_local);
316 CRYPTO_THREAD_lock_free(err_string_lock);
317 err_string_lock = NULL;
318 lh_ERR_STRING_DATA_free(int_error_hash);
319 int_error_hash = NULL;
323 * Legacy; pack in the library.
325 static void err_patch(int lib, ERR_STRING_DATA *str)
327 unsigned long plib = ERR_PACK(lib, 0, 0);
329 for (; str->error != 0; str++)
334 * Hash in |str| error strings. Assumes the URN_ONCE was done.
336 static int err_load_strings(const ERR_STRING_DATA *str)
338 CRYPTO_THREAD_write_lock(err_string_lock);
339 for (; str->error; str++)
340 (void)lh_ERR_STRING_DATA_insert(int_error_hash,
341 (ERR_STRING_DATA *)str);
342 CRYPTO_THREAD_unlock(err_string_lock);
346 int ERR_load_ERR_strings(void)
348 #ifndef OPENSSL_NO_ERR
349 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
352 err_load_strings(ERR_str_libraries);
353 err_load_strings(ERR_str_reasons);
354 err_patch(ERR_LIB_SYS, ERR_str_functs);
355 err_load_strings(ERR_str_functs);
356 build_SYS_str_reasons();
361 int ERR_load_strings(int lib, ERR_STRING_DATA *str)
363 if (ERR_load_ERR_strings() == 0)
367 err_load_strings(str);
371 int ERR_load_strings_const(const ERR_STRING_DATA *str)
373 if (ERR_load_ERR_strings() == 0)
375 err_load_strings(str);
379 int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
381 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
384 CRYPTO_THREAD_write_lock(err_string_lock);
386 * We don't need to ERR_PACK the lib, since that was done (to
387 * the table) when it was loaded.
389 for (; str->error; str++)
390 (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
391 CRYPTO_THREAD_unlock(err_string_lock);
396 void err_free_strings_int(void)
398 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
402 /********************************************************/
404 void ERR_put_error(int lib, int func, int reason, const char *file, int line)
410 * In the BS2000-OSD POSIX subsystem, the compiler generates path names
411 * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
412 * something sensible. @@@ We shouldn't modify a const string, though.
414 if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
417 /* Skip the "*POSIX(" prefix */
418 file += sizeof("*POSIX(") - 1;
419 end = &file[strlen(file) - 1];
422 /* Optional: use the basename of the path only. */
423 if ((end = strrchr(file, '/')) != NULL)
427 es = ERR_get_state();
431 es->top = (es->top + 1) % ERR_NUM_ERRORS;
432 if (es->top == es->bottom)
433 es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
434 es->err_flags[es->top] = 0;
435 es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
436 es->err_file[es->top] = file;
437 es->err_line[es->top] = line;
438 err_clear_data(es, es->top);
441 void ERR_clear_error(void)
446 es = ERR_get_state();
450 for (i = 0; i < ERR_NUM_ERRORS; i++) {
453 es->top = es->bottom = 0;
456 unsigned long ERR_get_error(void)
458 return get_error_values(1, 0, NULL, NULL, NULL, NULL);
461 unsigned long ERR_get_error_line(const char **file, int *line)
463 return get_error_values(1, 0, file, line, NULL, NULL);
466 unsigned long ERR_get_error_line_data(const char **file, int *line,
467 const char **data, int *flags)
469 return get_error_values(1, 0, file, line, data, flags);
472 unsigned long ERR_peek_error(void)
474 return get_error_values(0, 0, NULL, NULL, NULL, NULL);
477 unsigned long ERR_peek_error_line(const char **file, int *line)
479 return get_error_values(0, 0, file, line, NULL, NULL);
482 unsigned long ERR_peek_error_line_data(const char **file, int *line,
483 const char **data, int *flags)
485 return get_error_values(0, 0, file, line, data, flags);
488 unsigned long ERR_peek_last_error(void)
490 return get_error_values(0, 1, NULL, NULL, NULL, NULL);
493 unsigned long ERR_peek_last_error_line(const char **file, int *line)
495 return get_error_values(0, 1, file, line, NULL, NULL);
498 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
499 const char **data, int *flags)
501 return get_error_values(0, 1, file, line, data, flags);
504 static unsigned long get_error_values(int inc, int top, const char **file,
505 int *line, const char **data,
512 es = ERR_get_state();
526 return ERR_R_INTERNAL_ERROR;
529 while (es->bottom != es->top) {
530 if (es->err_flags[es->top] & ERR_FLAG_CLEAR) {
531 err_clear(es, es->top);
532 es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
535 i = (es->bottom + 1) % ERR_NUM_ERRORS;
536 if (es->err_flags[i] & ERR_FLAG_CLEAR) {
538 err_clear(es, es->bottom);
544 if (es->bottom == es->top)
548 i = es->top; /* last error */
550 i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
552 ret = es->err_buffer[i];
555 es->err_buffer[i] = 0;
558 if (file != NULL && line != NULL) {
559 if (es->err_file[i] == NULL) {
563 *file = es->err_file[i];
564 *line = es->err_line[i];
570 err_clear_data(es, i);
573 if (es->err_data[i] == NULL) {
578 *data = es->err_data[i];
580 *flags = es->err_data_flags[i];
586 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
588 char lsbuf[64], fsbuf[64], rsbuf[64];
589 const char *ls, *fs, *rs;
590 unsigned long l, f, r;
596 ls = ERR_lib_error_string(e);
598 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
602 fs = ERR_func_error_string(e);
605 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
609 rs = ERR_reason_error_string(e);
610 r = ERR_GET_REASON(e);
612 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
616 BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, fs, rs);
617 if (strlen(buf) == len - 1) {
618 /* Didn't fit; use a minimal format. */
619 BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r);
624 * ERR_error_string_n should be used instead for ret != NULL as
625 * ERR_error_string cannot know how large the buffer is
627 char *ERR_error_string(unsigned long e, char *ret)
629 static char buf[256];
633 ERR_error_string_n(e, ret, (int)sizeof(buf));
637 const char *ERR_lib_error_string(unsigned long e)
639 ERR_STRING_DATA d, *p;
642 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
647 d.error = ERR_PACK(l, 0, 0);
648 p = int_err_get_item(&d);
649 return ((p == NULL) ? NULL : p->string);
652 const char *ERR_func_error_string(unsigned long e)
654 ERR_STRING_DATA d, *p;
657 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
663 d.error = ERR_PACK(l, f, 0);
664 p = int_err_get_item(&d);
665 return ((p == NULL) ? NULL : p->string);
668 const char *ERR_reason_error_string(unsigned long e)
670 ERR_STRING_DATA d, *p = NULL;
673 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
678 r = ERR_GET_REASON(e);
679 d.error = ERR_PACK(l, 0, r);
680 p = int_err_get_item(&d);
682 d.error = ERR_PACK(0, 0, r);
683 p = int_err_get_item(&d);
685 return ((p == NULL) ? NULL : p->string);
688 void err_delete_thread_state(void)
690 ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);
694 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
695 ERR_STATE_free(state);
698 #if !OPENSSL_API_1_1_0
699 void ERR_remove_thread_state(void *dummy)
704 #if !OPENSSL_API_1_0_0
705 void ERR_remove_state(unsigned long pid)
710 DEFINE_RUN_ONCE_STATIC(err_do_init)
712 set_err_thread_local = 1;
713 return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
716 ERR_STATE *ERR_get_state(void)
719 int saveerrno = get_last_sys_error();
721 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
724 if (!RUN_ONCE(&err_init, err_do_init))
727 state = CRYPTO_THREAD_get_local(&err_thread_local);
728 if (state == (ERR_STATE*)-1)
732 if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
735 if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) {
736 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
740 if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE)
741 || !CRYPTO_THREAD_set_local(&err_thread_local, state)) {
742 ERR_STATE_free(state);
743 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
747 /* Ignore failures from these */
748 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
751 set_sys_error(saveerrno);
756 * err_shelve_state returns the current thread local error state
757 * and freezes the error module until err_unshelve_state is called.
759 int err_shelve_state(void **state)
761 int saveerrno = get_last_sys_error();
764 * Note, at present our only caller is OPENSSL_init_crypto(), indirectly
765 * via ossl_init_load_crypto_nodelete(), by which point the requested
766 * "base" initialization has already been performed, so the below call is a
767 * NOOP, that re-enters OPENSSL_init_crypto() only to quickly return.
769 * If are no other valid callers of this function, the call below can be
770 * removed, avoiding the re-entry into OPENSSL_init_crypto(). If there are
771 * potential uses that are not from inside OPENSSL_init_crypto(), then this
772 * call is needed, but some care is required to make sure that the re-entry
775 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
778 if (!RUN_ONCE(&err_init, err_do_init))
781 *state = CRYPTO_THREAD_get_local(&err_thread_local);
782 if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
785 set_sys_error(saveerrno);
790 * err_unshelve_state restores the error state that was returned
791 * by err_shelve_state previously.
793 void err_unshelve_state(void* state)
795 if (state != (void*)-1)
796 CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state);
799 int ERR_get_next_error_library(void)
803 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
806 CRYPTO_THREAD_write_lock(err_string_lock);
807 ret = int_err_library_number++;
808 CRYPTO_THREAD_unlock(err_string_lock);
812 static int err_set_error_data_int(char *data, int flags)
817 es = ERR_get_state();
823 err_clear_data(es, i);
824 es->err_data[i] = data;
825 es->err_data_flags[i] = flags;
830 void ERR_set_error_data(char *data, int flags)
833 * This function is void so we cannot propagate the error return. Since it
834 * is also in the public API we can't change the return type.
836 err_set_error_data_int(data, flags);
839 void ERR_add_error_data(int num, ...)
843 ERR_add_error_vdata(num, args);
847 void ERR_add_error_vdata(int num, va_list args)
853 if ((str = OPENSSL_malloc(s + 1)) == NULL) {
854 /* ERRerr(ERR_F_ERR_ADD_ERROR_VDATA, ERR_R_MALLOC_FAILURE); */
860 for (i = 0; i < num; i++) {
861 a = va_arg(args, char *);
867 p = OPENSSL_realloc(str, s + 1);
874 OPENSSL_strlcat(str, a, (size_t)s + 1);
876 if (!err_set_error_data_int(str, ERR_TXT_MALLOCED | ERR_TXT_STRING))
880 int ERR_set_mark(void)
884 es = ERR_get_state();
888 if (es->bottom == es->top)
890 es->err_flags[es->top] |= ERR_FLAG_MARK;
894 int ERR_pop_to_mark(void)
898 es = ERR_get_state();
902 while (es->bottom != es->top
903 && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
904 err_clear(es, es->top);
905 es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
908 if (es->bottom == es->top)
910 es->err_flags[es->top] &= ~ERR_FLAG_MARK;
914 int ERR_clear_last_mark(void)
919 es = ERR_get_state();
924 while (es->bottom != top
925 && (es->err_flags[top] & ERR_FLAG_MARK) == 0) {
926 top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
929 if (es->bottom == top)
931 es->err_flags[top] &= ~ERR_FLAG_MARK;
935 void err_clear_last_constant_time(int clear)
940 es = ERR_get_state();
947 * Flag error as cleared but remove it elsewhere to avoid two errors
948 * accessing the same error stack location, revealing timing information.
950 clear = constant_time_select_int(constant_time_eq_int(clear, 0),
952 es->err_flags[top] |= clear;