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aa6bb135 | 1 | /* |
6738bf14 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
0a150c5c | 3 | * |
4ad239b8 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
aa6bb135 RS |
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 | |
0a150c5c | 8 | */ |
d02b48c6 | 9 | |
14e275e8 RL |
10 | /* TODO: When ERR_STATE becomes opaque, this musts be removed */ |
11 | #define OSSL_FORCE_ERR_STATE | |
12 | ||
d02b48c6 | 13 | #include <stdio.h> |
4565c3e3 | 14 | #include <stdarg.h> |
0a150c5c | 15 | #include <string.h> |
25f2138b | 16 | #include "crypto/cryptlib.h" |
176db6dc | 17 | #include "internal/err.h" |
25f2138b | 18 | #include "crypto/err.h" |
52df25cf | 19 | #include <openssl/err.h> |
ec577822 | 20 | #include <openssl/crypto.h> |
ec577822 | 21 | #include <openssl/buffer.h> |
e5c84d51 | 22 | #include <openssl/bio.h> |
98186eb4 | 23 | #include <openssl/opensslconf.h> |
176db6dc | 24 | #include "internal/thread_once.h" |
25f2138b | 25 | #include "crypto/ctype.h" |
f658a3b6 | 26 | #include "internal/constant_time_locl.h" |
71b1ceff | 27 | #include "e_os.h" |
8a4dc425 | 28 | #include "err_locl.h" |
3c1d6bbc | 29 | |
14e275e8 RL |
30 | /* Forward declaration in case it's not published because of configuration */ |
31 | ERR_STATE *ERR_get_state(void); | |
32 | ||
52df25cf | 33 | static int err_load_strings(const ERR_STRING_DATA *str); |
cf5bfbfc | 34 | |
58964a49 | 35 | static void ERR_STATE_free(ERR_STATE *s); |
cf1b7d96 | 36 | #ifndef OPENSSL_NO_ERR |
0f113f3e MC |
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"}, | |
49844486 | 65 | {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"}, |
0f113f3e MC |
66 | {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"}, |
67 | {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"}, | |
a61b7f2f | 68 | {ERR_PACK(ERR_LIB_CRMF, 0, 0), "CRMF routines"}, |
8869ad4a | 69 | {ERR_PACK(ERR_LIB_CMP, 0, 0), "CMP routines"}, |
0f113f3e | 70 | {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"}, |
0cea8832 | 71 | {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"}, |
079a1a90 | 72 | {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"}, |
71a5516d | 73 | {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"}, |
3d328a44 | 74 | {ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"}, |
e85d19c6 | 75 | {ERR_PACK(ERR_LIB_ESS, 0, 0), "ESS routines"}, |
6caf7f3a | 76 | {ERR_PACK(ERR_LIB_PROV, 0, 0), "Provider routines"}, |
0f113f3e MC |
77 | {0, NULL}, |
78 | }; | |
79 | ||
0f113f3e MC |
80 | static ERR_STRING_DATA ERR_str_reasons[] = { |
81 | {ERR_R_SYS_LIB, "system lib"}, | |
82 | {ERR_R_BN_LIB, "BN lib"}, | |
83 | {ERR_R_RSA_LIB, "RSA lib"}, | |
84 | {ERR_R_DH_LIB, "DH lib"}, | |
85 | {ERR_R_EVP_LIB, "EVP lib"}, | |
86 | {ERR_R_BUF_LIB, "BUF lib"}, | |
87 | {ERR_R_OBJ_LIB, "OBJ lib"}, | |
88 | {ERR_R_PEM_LIB, "PEM lib"}, | |
89 | {ERR_R_DSA_LIB, "DSA lib"}, | |
90 | {ERR_R_X509_LIB, "X509 lib"}, | |
91 | {ERR_R_ASN1_LIB, "ASN1 lib"}, | |
0f113f3e | 92 | {ERR_R_EC_LIB, "EC lib"}, |
0f113f3e MC |
93 | {ERR_R_BIO_LIB, "BIO lib"}, |
94 | {ERR_R_PKCS7_LIB, "PKCS7 lib"}, | |
95 | {ERR_R_X509V3_LIB, "X509V3 lib"}, | |
0f113f3e | 96 | {ERR_R_ENGINE_LIB, "ENGINE lib"}, |
c785fd48 | 97 | {ERR_R_UI_LIB, "UI lib"}, |
71a5516d | 98 | {ERR_R_OSSL_STORE_LIB, "STORE lib"}, |
0f113f3e MC |
99 | {ERR_R_ECDSA_LIB, "ECDSA lib"}, |
100 | ||
101 | {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"}, | |
0f113f3e MC |
102 | {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"}, |
103 | ||
104 | {ERR_R_FATAL, "fatal"}, | |
105 | {ERR_R_MALLOC_FAILURE, "malloc failure"}, | |
106 | {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED, | |
107 | "called a function you should not call"}, | |
108 | {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"}, | |
109 | {ERR_R_INTERNAL_ERROR, "internal error"}, | |
110 | {ERR_R_DISABLED, "called a function that was disabled at compile-time"}, | |
302f7588 | 111 | {ERR_R_INIT_FAIL, "init fail"}, |
9a32dcf4 | 112 | {ERR_R_OPERATION_FAIL, "operation fail"}, |
0f113f3e MC |
113 | |
114 | {0, NULL}, | |
115 | }; | |
d02b48c6 | 116 | #endif |
0a150c5c | 117 | |
8509dcc9 | 118 | static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT; |
73bc5370 | 119 | static int set_err_thread_local; |
8509dcc9 AG |
120 | static CRYPTO_THREAD_LOCAL err_thread_local; |
121 | ||
7b8e12d2 AG |
122 | static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT; |
123 | static CRYPTO_RWLOCK *err_string_lock; | |
124 | ||
566bdf2b | 125 | static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *); |
566bdf2b | 126 | |
0f113f3e | 127 | /* |
3e47caff | 128 | * The internal state |
0f113f3e | 129 | */ |
f3f1cf84 | 130 | |
3c1d6bbc | 131 | static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL; |
0f113f3e | 132 | static int int_err_library_number = ERR_LIB_USER; |
566bdf2b | 133 | |
b4570683 RS |
134 | typedef enum ERR_GET_ACTION_e { |
135 | EV_POP, EV_PEEK, EV_PEEK_LAST | |
136 | } ERR_GET_ACTION; | |
137 | ||
138 | static unsigned long get_error_values(ERR_GET_ACTION g, | |
139 | const char **file, int *line, | |
140 | const char **func, const char **data, | |
141 | int *flags); | |
566bdf2b | 142 | |
3c1d6bbc | 143 | static unsigned long err_string_data_hash(const ERR_STRING_DATA *a) |
0f113f3e MC |
144 | { |
145 | unsigned long ret, l; | |
146 | ||
147 | l = a->error; | |
aac96e27 | 148 | ret = l ^ ERR_GET_LIB(l); |
0f113f3e MC |
149 | return (ret ^ ret % 19 * 13); |
150 | } | |
3c1d6bbc | 151 | |
3c1d6bbc | 152 | static int err_string_data_cmp(const ERR_STRING_DATA *a, |
0f113f3e MC |
153 | const ERR_STRING_DATA *b) |
154 | { | |
c784a838 RS |
155 | if (a->error == b->error) |
156 | return 0; | |
157 | return a->error > b->error ? 1 : -1; | |
0f113f3e MC |
158 | } |
159 | ||
566bdf2b | 160 | static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d) |
0f113f3e | 161 | { |
3e47caff | 162 | ERR_STRING_DATA *p = NULL; |
78f79235 | 163 | |
7b8e12d2 | 164 | CRYPTO_THREAD_read_lock(err_string_lock); |
52df25cf | 165 | p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d); |
7b8e12d2 | 166 | CRYPTO_THREAD_unlock(err_string_lock); |
78f79235 | 167 | |
0f113f3e MC |
168 | return p; |
169 | } | |
567fef89 | 170 | |
758f942b | 171 | #ifndef OPENSSL_NO_ERR |
fac9200a VC |
172 | /* 2019-05-21: Russian and Ukrainian locales on Linux require more than 6,5 kB */ |
173 | # define SPACE_SYS_STR_REASONS 8 * 1024 | |
0f113f3e | 174 | # define NUM_SYS_STR_REASONS 127 |
0a150c5c BM |
175 | |
176 | static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1]; | |
0f113f3e MC |
177 | /* |
178 | * SYS_str_reasons is filled with copies of strerror() results at | |
179 | * initialization. 'errno' values up to 127 should cover all usual errors, | |
180 | * others will be displayed numerically by ERR_error_string. It is crucial | |
181 | * that we have something for each reason code that occurs in | |
182 | * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(), | |
183 | * which always gets an errno value and never one of those 'standard' reason | |
184 | * codes. | |
185 | */ | |
0a150c5c | 186 | |
41a15c4f | 187 | static void build_SYS_str_reasons(void) |
0f113f3e MC |
188 | { |
189 | /* OPENSSL_malloc cannot be used here, use static storage instead */ | |
2c5b6bbb RL |
190 | static char strerror_pool[SPACE_SYS_STR_REASONS]; |
191 | char *cur = strerror_pool; | |
192 | size_t cnt = 0; | |
0f113f3e | 193 | static int init = 1; |
3e47caff | 194 | int i; |
71b1ceff | 195 | int saveerrno = get_last_sys_error(); |
0f113f3e | 196 | |
7b8e12d2 | 197 | CRYPTO_THREAD_write_lock(err_string_lock); |
0f113f3e | 198 | if (!init) { |
7b8e12d2 | 199 | CRYPTO_THREAD_unlock(err_string_lock); |
0f113f3e MC |
200 | return; |
201 | } | |
202 | ||
203 | for (i = 1; i <= NUM_SYS_STR_REASONS; i++) { | |
204 | ERR_STRING_DATA *str = &SYS_str_reasons[i - 1]; | |
205 | ||
52df25cf | 206 | str->error = ERR_PACK(ERR_LIB_SYS, 0, i); |
fac9200a VC |
207 | /* |
208 | * If we have used up all the space in strerror_pool, | |
209 | * there's no point in calling openssl_strerror_r() | |
210 | */ | |
211 | if (str->string == NULL && cnt < sizeof(strerror_pool)) { | |
2c5b6bbb | 212 | if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) { |
9f15e5b9 | 213 | size_t l = strlen(cur); |
2c5b6bbb RL |
214 | |
215 | str->string = cur; | |
216 | cnt += l; | |
2c5b6bbb | 217 | cur += l; |
9f15e5b9 RL |
218 | |
219 | /* | |
220 | * VMS has an unusual quirk of adding spaces at the end of | |
fac9200a | 221 | * some (most? all?) messages. Lets trim them off. |
9f15e5b9 | 222 | */ |
fac9200a | 223 | while (cur > strerror_pool && ossl_isspace(cur[-1])) { |
9f15e5b9 RL |
224 | cur--; |
225 | cnt--; | |
226 | } | |
227 | *cur++ = '\0'; | |
228 | cnt++; | |
2c5b6bbb | 229 | } |
0f113f3e MC |
230 | } |
231 | if (str->string == NULL) | |
232 | str->string = "unknown"; | |
233 | } | |
234 | ||
235 | /* | |
236 | * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as | |
237 | * required by ERR_load_strings. | |
238 | */ | |
239 | ||
240 | init = 0; | |
241 | ||
7b8e12d2 | 242 | CRYPTO_THREAD_unlock(err_string_lock); |
71b1ceff MC |
243 | /* openssl_strerror_r could change errno, but we want to preserve it */ |
244 | set_sys_error(saveerrno); | |
52df25cf | 245 | err_load_strings(SYS_str_reasons); |
0f113f3e | 246 | } |
d02b48c6 RE |
247 | #endif |
248 | ||
6b691a5c | 249 | static void ERR_STATE_free(ERR_STATE *s) |
0f113f3e MC |
250 | { |
251 | int i; | |
58964a49 | 252 | |
e6e9170d RS |
253 | if (s == NULL) |
254 | return; | |
0f113f3e | 255 | for (i = 0; i < ERR_NUM_ERRORS; i++) { |
10f8b368 | 256 | err_clear_data(s, i, 1); |
0f113f3e MC |
257 | } |
258 | OPENSSL_free(s); | |
259 | } | |
58964a49 | 260 | |
c2e4e5d2 | 261 | DEFINE_RUN_ONCE_STATIC(do_err_strings_init) |
7b8e12d2 | 262 | { |
eb2b9892 BE |
263 | if (!OPENSSL_init_crypto(0, NULL)) |
264 | return 0; | |
63ab5ea1 | 265 | err_string_lock = CRYPTO_THREAD_lock_new(); |
eb2b9892 BE |
266 | if (err_string_lock == NULL) |
267 | return 0; | |
52df25cf RS |
268 | int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash, |
269 | err_string_data_cmp); | |
eb2b9892 BE |
270 | if (int_error_hash == NULL) { |
271 | CRYPTO_THREAD_lock_free(err_string_lock); | |
272 | err_string_lock = NULL; | |
273 | return 0; | |
274 | } | |
275 | return 1; | |
ff234405 MC |
276 | } |
277 | ||
278 | void err_cleanup(void) | |
279 | { | |
73bc5370 RS |
280 | if (set_err_thread_local != 0) |
281 | CRYPTO_THREAD_cleanup_local(&err_thread_local); | |
ff234405 MC |
282 | CRYPTO_THREAD_lock_free(err_string_lock); |
283 | err_string_lock = NULL; | |
52df25cf RS |
284 | lh_ERR_STRING_DATA_free(int_error_hash); |
285 | int_error_hash = NULL; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Legacy; pack in the library. | |
290 | */ | |
291 | static void err_patch(int lib, ERR_STRING_DATA *str) | |
292 | { | |
293 | unsigned long plib = ERR_PACK(lib, 0, 0); | |
294 | ||
295 | for (; str->error != 0; str++) | |
296 | str->error |= plib; | |
297 | } | |
298 | ||
299 | /* | |
300 | * Hash in |str| error strings. Assumes the URN_ONCE was done. | |
301 | */ | |
302 | static int err_load_strings(const ERR_STRING_DATA *str) | |
303 | { | |
304 | CRYPTO_THREAD_write_lock(err_string_lock); | |
305 | for (; str->error; str++) | |
306 | (void)lh_ERR_STRING_DATA_insert(int_error_hash, | |
307 | (ERR_STRING_DATA *)str); | |
308 | CRYPTO_THREAD_unlock(err_string_lock); | |
309 | return 1; | |
7b8e12d2 AG |
310 | } |
311 | ||
69588edb | 312 | int ERR_load_ERR_strings(void) |
0f113f3e | 313 | { |
cf1b7d96 | 314 | #ifndef OPENSSL_NO_ERR |
69588edb KR |
315 | if (!RUN_ONCE(&err_string_init, do_err_strings_init)) |
316 | return 0; | |
7b8e12d2 | 317 | |
52df25cf RS |
318 | err_load_strings(ERR_str_libraries); |
319 | err_load_strings(ERR_str_reasons); | |
0f113f3e | 320 | build_SYS_str_reasons(); |
d02b48c6 | 321 | #endif |
69588edb | 322 | return 1; |
0f113f3e | 323 | } |
d02b48c6 | 324 | |
52df25cf | 325 | int ERR_load_strings(int lib, ERR_STRING_DATA *str) |
0f113f3e | 326 | { |
52df25cf RS |
327 | if (ERR_load_ERR_strings() == 0) |
328 | return 0; | |
329 | ||
330 | err_patch(lib, str); | |
331 | err_load_strings(str); | |
332 | return 1; | |
0f113f3e | 333 | } |
d02b48c6 | 334 | |
52df25cf | 335 | int ERR_load_strings_const(const ERR_STRING_DATA *str) |
0f113f3e | 336 | { |
69588edb KR |
337 | if (ERR_load_ERR_strings() == 0) |
338 | return 0; | |
52df25cf | 339 | err_load_strings(str); |
69588edb | 340 | return 1; |
0f113f3e | 341 | } |
cf5bfbfc | 342 | |
c2e4e5d2 | 343 | int ERR_unload_strings(int lib, ERR_STRING_DATA *str) |
0f113f3e | 344 | { |
c2e4e5d2 RL |
345 | if (!RUN_ONCE(&err_string_init, do_err_strings_init)) |
346 | return 0; | |
7b8e12d2 AG |
347 | |
348 | CRYPTO_THREAD_write_lock(err_string_lock); | |
52df25cf RS |
349 | /* |
350 | * We don't need to ERR_PACK the lib, since that was done (to | |
351 | * the table) when it was loaded. | |
352 | */ | |
353 | for (; str->error; str++) | |
354 | (void)lh_ERR_STRING_DATA_delete(int_error_hash, str); | |
7b8e12d2 | 355 | CRYPTO_THREAD_unlock(err_string_lock); |
c2e4e5d2 RL |
356 | |
357 | return 1; | |
0f113f3e | 358 | } |
1738bb61 | 359 | |
b3599dbb | 360 | void err_free_strings_int(void) |
0f113f3e | 361 | { |
c2e4e5d2 RL |
362 | if (!RUN_ONCE(&err_string_init, do_err_strings_init)) |
363 | return; | |
0f113f3e | 364 | } |
d02b48c6 | 365 | |
58964a49 RE |
366 | /********************************************************/ |
367 | ||
6b691a5c | 368 | void ERR_clear_error(void) |
0f113f3e MC |
369 | { |
370 | int i; | |
371 | ERR_STATE *es; | |
d02b48c6 | 372 | |
e5d4233f | 373 | es = err_get_state_int(); |
4fc426b7 BE |
374 | if (es == NULL) |
375 | return; | |
d02b48c6 | 376 | |
0f113f3e | 377 | for (i = 0; i < ERR_NUM_ERRORS; i++) { |
10f8b368 | 378 | err_clear(es, i, 0); |
0f113f3e MC |
379 | } |
380 | es->top = es->bottom = 0; | |
381 | } | |
d02b48c6 | 382 | |
6b691a5c | 383 | unsigned long ERR_get_error(void) |
0f113f3e | 384 | { |
b4570683 | 385 | return get_error_values(EV_POP, NULL, NULL, NULL, NULL, NULL); |
0f113f3e | 386 | } |
d02b48c6 | 387 | |
0f113f3e MC |
388 | unsigned long ERR_get_error_line(const char **file, int *line) |
389 | { | |
b4570683 | 390 | return get_error_values(EV_POP, file, line, NULL, NULL, NULL); |
0f113f3e | 391 | } |
d02b48c6 | 392 | |
b13342e9 RL |
393 | unsigned long ERR_get_error_func(const char **func) |
394 | { | |
b4570683 | 395 | return get_error_values(EV_POP, NULL, NULL, func, NULL, NULL); |
b13342e9 RL |
396 | } |
397 | ||
398 | unsigned long ERR_get_error_data(const char **data, int *flags) | |
399 | { | |
b4570683 | 400 | return get_error_values(EV_POP, NULL, NULL, NULL, data, flags); |
b13342e9 RL |
401 | } |
402 | ||
403 | unsigned long ERR_get_error_all(const char **file, int *line, | |
404 | const char **func, | |
405 | const char **data, int *flags) | |
406 | { | |
b4570683 | 407 | return get_error_values(EV_POP, file, line, func, data, flags); |
b13342e9 RL |
408 | } |
409 | ||
410 | #if !OPENSSL_API_3 | |
6b691a5c | 411 | unsigned long ERR_get_error_line_data(const char **file, int *line, |
0f113f3e MC |
412 | const char **data, int *flags) |
413 | { | |
b4570683 | 414 | return get_error_values(EV_POP, file, line, NULL, data, flags); |
0f113f3e | 415 | } |
b13342e9 | 416 | #endif |
273db408 | 417 | |
6b691a5c | 418 | unsigned long ERR_peek_error(void) |
0f113f3e | 419 | { |
b4570683 | 420 | return get_error_values(EV_PEEK, NULL, NULL, NULL, NULL, NULL); |
0f113f3e | 421 | } |
d02b48c6 | 422 | |
a14e2d9d | 423 | unsigned long ERR_peek_error_line(const char **file, int *line) |
0f113f3e | 424 | { |
b4570683 | 425 | return get_error_values(EV_PEEK, file, line, NULL, NULL, NULL); |
b13342e9 RL |
426 | } |
427 | ||
428 | unsigned long ERR_peek_error_func(const char **func) | |
429 | { | |
b4570683 | 430 | return get_error_values(EV_PEEK, NULL, NULL, func, NULL, NULL); |
b13342e9 RL |
431 | } |
432 | ||
433 | unsigned long ERR_peek_error_data(const char **data, int *flags) | |
434 | { | |
b4570683 | 435 | return get_error_values(EV_PEEK, NULL, NULL, NULL, data, flags); |
b13342e9 RL |
436 | } |
437 | ||
438 | unsigned long ERR_peek_error_all(const char **file, int *line, | |
439 | const char **func, | |
440 | const char **data, int *flags) | |
441 | { | |
b4570683 | 442 | return get_error_values(EV_PEEK, file, line, func, data, flags); |
0f113f3e | 443 | } |
0fc5cf08 | 444 | |
b13342e9 | 445 | #if !OPENSSL_API_3 |
6b691a5c | 446 | unsigned long ERR_peek_error_line_data(const char **file, int *line, |
0f113f3e MC |
447 | const char **data, int *flags) |
448 | { | |
b4570683 | 449 | return get_error_values(EV_PEEK, file, line, NULL, data, flags); |
0f113f3e | 450 | } |
b13342e9 | 451 | #endif |
273db408 BM |
452 | |
453 | unsigned long ERR_peek_last_error(void) | |
0f113f3e | 454 | { |
b4570683 | 455 | return get_error_values(EV_PEEK_LAST, NULL, NULL, NULL, NULL, NULL); |
0f113f3e | 456 | } |
273db408 BM |
457 | |
458 | unsigned long ERR_peek_last_error_line(const char **file, int *line) | |
0f113f3e | 459 | { |
b4570683 | 460 | return get_error_values(EV_PEEK_LAST, file, line, NULL, NULL, NULL); |
b13342e9 RL |
461 | } |
462 | ||
463 | unsigned long ERR_peek_last_error_func(const char **func) | |
464 | { | |
b4570683 | 465 | return get_error_values(EV_PEEK_LAST, NULL, NULL, func, NULL, NULL); |
b13342e9 RL |
466 | } |
467 | ||
468 | unsigned long ERR_peek_last_error_data(const char **data, int *flags) | |
469 | { | |
b4570683 | 470 | return get_error_values(EV_PEEK_LAST, NULL, NULL, NULL, data, flags); |
b13342e9 RL |
471 | } |
472 | ||
473 | unsigned long ERR_peek_last_error_all(const char **file, int *line, | |
474 | const char **func, | |
475 | const char **data, int *flags) | |
476 | { | |
b4570683 | 477 | return get_error_values(EV_PEEK_LAST, file, line, func, data, flags); |
0f113f3e | 478 | } |
273db408 | 479 | |
b13342e9 | 480 | #if !OPENSSL_API_3 |
a14e2d9d | 481 | unsigned long ERR_peek_last_error_line_data(const char **file, int *line, |
0f113f3e MC |
482 | const char **data, int *flags) |
483 | { | |
b4570683 | 484 | return get_error_values(EV_PEEK_LAST, file, line, NULL, data, flags); |
0f113f3e | 485 | } |
b13342e9 | 486 | #endif |
0f113f3e | 487 | |
b4570683 RS |
488 | static unsigned long get_error_values(ERR_GET_ACTION g, |
489 | const char **file, int *line, | |
490 | const char **func, | |
b13342e9 | 491 | const char **data, int *flags) |
0f113f3e MC |
492 | { |
493 | int i = 0; | |
494 | ERR_STATE *es; | |
495 | unsigned long ret; | |
496 | ||
e5d4233f | 497 | es = err_get_state_int(); |
4fc426b7 BE |
498 | if (es == NULL) |
499 | return 0; | |
0f113f3e | 500 | |
b4570683 RS |
501 | /* |
502 | * Clear anything that should have been cleared earlier. We do this | |
503 | * here because this doesn't have constant-time issues. | |
504 | */ | |
94dc53a3 BE |
505 | while (es->bottom != es->top) { |
506 | if (es->err_flags[es->top] & ERR_FLAG_CLEAR) { | |
10f8b368 | 507 | err_clear(es, es->top, 0); |
94dc53a3 BE |
508 | es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1; |
509 | continue; | |
510 | } | |
511 | i = (es->bottom + 1) % ERR_NUM_ERRORS; | |
512 | if (es->err_flags[i] & ERR_FLAG_CLEAR) { | |
513 | es->bottom = i; | |
10f8b368 | 514 | err_clear(es, es->bottom, 0); |
94dc53a3 BE |
515 | continue; |
516 | } | |
517 | break; | |
518 | } | |
519 | ||
b4570683 | 520 | /* If everything has been cleared, the stack is empty. */ |
0f113f3e MC |
521 | if (es->bottom == es->top) |
522 | return 0; | |
94dc53a3 | 523 | |
b4570683 RS |
524 | /* Which error, the top of stack (latest one) or the first one? */ |
525 | if (g == EV_PEEK_LAST) | |
526 | i = es->top; | |
0f113f3e | 527 | else |
b4570683 | 528 | i = (es->bottom + 1) % ERR_NUM_ERRORS; |
0f113f3e MC |
529 | |
530 | ret = es->err_buffer[i]; | |
b4570683 | 531 | if (g == EV_POP) { |
0f113f3e MC |
532 | es->bottom = i; |
533 | es->err_buffer[i] = 0; | |
534 | } | |
535 | ||
a0fda2cf | 536 | if (file != NULL && line != NULL) { |
0f113f3e MC |
537 | if (es->err_file[i] == NULL) { |
538 | *file = "NA"; | |
a0fda2cf | 539 | *line = 0; |
0f113f3e MC |
540 | } else { |
541 | *file = es->err_file[i]; | |
a0fda2cf | 542 | *line = es->err_line[i]; |
0f113f3e MC |
543 | } |
544 | } | |
545 | ||
b13342e9 RL |
546 | if (func != NULL) { |
547 | *func = es->err_func[i]; | |
548 | if (*func == NULL) | |
549 | *func = "N/A"; | |
550 | } | |
551 | ||
0f113f3e | 552 | if (data == NULL) { |
b4570683 | 553 | if (g == EV_POP) { |
10f8b368 | 554 | err_clear_data(es, i, 0); |
0f113f3e MC |
555 | } |
556 | } else { | |
557 | if (es->err_data[i] == NULL) { | |
558 | *data = ""; | |
559 | if (flags != NULL) | |
560 | *flags = 0; | |
561 | } else { | |
562 | *data = es->err_data[i]; | |
563 | if (flags != NULL) | |
564 | *flags = es->err_data_flags[i]; | |
565 | } | |
566 | } | |
567 | return ret; | |
568 | } | |
d02b48c6 | 569 | |
e5c84d51 | 570 | void ERR_error_string_n(unsigned long e, char *buf, size_t len) |
0f113f3e | 571 | { |
aac96e27 RS |
572 | char lsbuf[64], rsbuf[64]; |
573 | const char *ls, *rs; | |
574 | unsigned long f = 0, l, r; | |
0f113f3e | 575 | |
e5c13615 MC |
576 | if (len == 0) |
577 | return; | |
578 | ||
0f113f3e | 579 | l = ERR_GET_LIB(e); |
0f113f3e | 580 | ls = ERR_lib_error_string(e); |
fa4dd546 | 581 | if (ls == NULL) { |
0f113f3e | 582 | BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l); |
fa4dd546 RS |
583 | ls = lsbuf; |
584 | } | |
585 | ||
fa4dd546 RS |
586 | rs = ERR_reason_error_string(e); |
587 | r = ERR_GET_REASON(e); | |
588 | if (rs == NULL) { | |
0f113f3e | 589 | BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r); |
fa4dd546 RS |
590 | rs = rsbuf; |
591 | } | |
0f113f3e | 592 | |
aac96e27 | 593 | BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, "", rs); |
0f113f3e | 594 | if (strlen(buf) == len - 1) { |
fa4dd546 RS |
595 | /* Didn't fit; use a minimal format. */ |
596 | BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r); | |
0f113f3e MC |
597 | } |
598 | } | |
e5c84d51 | 599 | |
0f113f3e MC |
600 | /* |
601 | * ERR_error_string_n should be used instead for ret != NULL as | |
602 | * ERR_error_string cannot know how large the buffer is | |
603 | */ | |
e5c84d51 | 604 | char *ERR_error_string(unsigned long e, char *ret) |
0f113f3e MC |
605 | { |
606 | static char buf[256]; | |
e5c84d51 | 607 | |
0f113f3e MC |
608 | if (ret == NULL) |
609 | ret = buf; | |
fa4dd546 | 610 | ERR_error_string_n(e, ret, (int)sizeof(buf)); |
0f113f3e MC |
611 | return ret; |
612 | } | |
d02b48c6 | 613 | |
6b691a5c | 614 | const char *ERR_lib_error_string(unsigned long e) |
0f113f3e MC |
615 | { |
616 | ERR_STRING_DATA d, *p; | |
617 | unsigned long l; | |
d02b48c6 | 618 | |
c2e4e5d2 RL |
619 | if (!RUN_ONCE(&err_string_init, do_err_strings_init)) { |
620 | return NULL; | |
621 | } | |
7b8e12d2 | 622 | |
0f113f3e MC |
623 | l = ERR_GET_LIB(e); |
624 | d.error = ERR_PACK(l, 0, 0); | |
3e47caff | 625 | p = int_err_get_item(&d); |
0f113f3e MC |
626 | return ((p == NULL) ? NULL : p->string); |
627 | } | |
d02b48c6 | 628 | |
b13342e9 | 629 | #if !OPENSSL_API_3 |
6b691a5c | 630 | const char *ERR_func_error_string(unsigned long e) |
0f113f3e | 631 | { |
b13342e9 | 632 | return NULL; |
0f113f3e | 633 | } |
b13342e9 | 634 | #endif |
d02b48c6 | 635 | |
6b691a5c | 636 | const char *ERR_reason_error_string(unsigned long e) |
0f113f3e MC |
637 | { |
638 | ERR_STRING_DATA d, *p = NULL; | |
639 | unsigned long l, r; | |
640 | ||
c2e4e5d2 RL |
641 | if (!RUN_ONCE(&err_string_init, do_err_strings_init)) { |
642 | return NULL; | |
643 | } | |
7b8e12d2 | 644 | |
0f113f3e MC |
645 | l = ERR_GET_LIB(e); |
646 | r = ERR_GET_REASON(e); | |
647 | d.error = ERR_PACK(l, 0, r); | |
3e47caff | 648 | p = int_err_get_item(&d); |
0f113f3e MC |
649 | if (!p) { |
650 | d.error = ERR_PACK(0, 0, r); | |
3e47caff | 651 | p = int_err_get_item(&d); |
0f113f3e MC |
652 | } |
653 | return ((p == NULL) ? NULL : p->string); | |
654 | } | |
d02b48c6 | 655 | |
da747958 MC |
656 | /* TODO(3.0): arg ignored for now */ |
657 | static void err_delete_thread_state(void *arg) | |
0f113f3e | 658 | { |
af6de400 | 659 | ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local); |
8509dcc9 AG |
660 | if (state == NULL) |
661 | return; | |
0f113f3e | 662 | |
8509dcc9 AG |
663 | CRYPTO_THREAD_set_local(&err_thread_local, NULL); |
664 | ERR_STATE_free(state); | |
0f113f3e | 665 | } |
d02b48c6 | 666 | |
fcd2d5a6 | 667 | #if !OPENSSL_API_1_1_0 |
21e00174 RL |
668 | void ERR_remove_thread_state(void *dummy) |
669 | { | |
670 | } | |
671 | #endif | |
672 | ||
fcd2d5a6 | 673 | #if !OPENSSL_API_1_0_0 |
4c329696 | 674 | void ERR_remove_state(unsigned long pid) |
0f113f3e | 675 | { |
0f113f3e | 676 | } |
4c329696 GT |
677 | #endif |
678 | ||
c2e4e5d2 | 679 | DEFINE_RUN_ONCE_STATIC(err_do_init) |
8509dcc9 | 680 | { |
73bc5370 | 681 | set_err_thread_local = 1; |
c2e4e5d2 | 682 | return CRYPTO_THREAD_init_local(&err_thread_local, NULL); |
8509dcc9 AG |
683 | } |
684 | ||
e5d4233f | 685 | ERR_STATE *err_get_state_int(void) |
0f113f3e | 686 | { |
eb2b9892 | 687 | ERR_STATE *state; |
91c54730 | 688 | int saveerrno = get_last_sys_error(); |
eb2b9892 BE |
689 | |
690 | if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL)) | |
691 | return NULL; | |
8509dcc9 | 692 | |
c2e4e5d2 RL |
693 | if (!RUN_ONCE(&err_init, err_do_init)) |
694 | return NULL; | |
8509dcc9 AG |
695 | |
696 | state = CRYPTO_THREAD_get_local(&err_thread_local); | |
6b49b308 BE |
697 | if (state == (ERR_STATE*)-1) |
698 | return NULL; | |
8509dcc9 AG |
699 | |
700 | if (state == NULL) { | |
6b49b308 BE |
701 | if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1)) |
702 | return NULL; | |
703 | ||
cdb10bae | 704 | if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) { |
6b49b308 | 705 | CRYPTO_THREAD_set_local(&err_thread_local, NULL); |
8509dcc9 | 706 | return NULL; |
cdb10bae | 707 | } |
8509dcc9 | 708 | |
6913f5fe | 709 | if (!ossl_init_thread_start(NULL, NULL, err_delete_thread_state) |
6b49b308 | 710 | || !CRYPTO_THREAD_set_local(&err_thread_local, state)) { |
8509dcc9 | 711 | ERR_STATE_free(state); |
6b49b308 | 712 | CRYPTO_THREAD_set_local(&err_thread_local, NULL); |
8509dcc9 | 713 | return NULL; |
0f113f3e | 714 | } |
0fc32b07 MC |
715 | |
716 | /* Ignore failures from these */ | |
f672aee4 | 717 | OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL); |
0f113f3e | 718 | } |
8509dcc9 | 719 | |
91c54730 | 720 | set_sys_error(saveerrno); |
8509dcc9 | 721 | return state; |
0f113f3e | 722 | } |
d02b48c6 | 723 | |
e5d4233f RL |
724 | #if !OPENSSL_API_3 |
725 | ERR_STATE *ERR_get_state(void) | |
726 | { | |
727 | return err_get_state_int(); | |
728 | } | |
729 | #endif | |
730 | ||
731 | ||
eb2b9892 BE |
732 | /* |
733 | * err_shelve_state returns the current thread local error state | |
734 | * and freezes the error module until err_unshelve_state is called. | |
735 | */ | |
736 | int err_shelve_state(void **state) | |
737 | { | |
91c54730 RL |
738 | int saveerrno = get_last_sys_error(); |
739 | ||
df1f538f VD |
740 | /* |
741 | * Note, at present our only caller is OPENSSL_init_crypto(), indirectly | |
742 | * via ossl_init_load_crypto_nodelete(), by which point the requested | |
743 | * "base" initialization has already been performed, so the below call is a | |
744 | * NOOP, that re-enters OPENSSL_init_crypto() only to quickly return. | |
745 | * | |
746 | * If are no other valid callers of this function, the call below can be | |
747 | * removed, avoiding the re-entry into OPENSSL_init_crypto(). If there are | |
748 | * potential uses that are not from inside OPENSSL_init_crypto(), then this | |
749 | * call is needed, but some care is required to make sure that the re-entry | |
750 | * remains a NOOP. | |
751 | */ | |
eb2b9892 BE |
752 | if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL)) |
753 | return 0; | |
754 | ||
755 | if (!RUN_ONCE(&err_init, err_do_init)) | |
756 | return 0; | |
757 | ||
758 | *state = CRYPTO_THREAD_get_local(&err_thread_local); | |
759 | if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1)) | |
760 | return 0; | |
761 | ||
91c54730 | 762 | set_sys_error(saveerrno); |
eb2b9892 BE |
763 | return 1; |
764 | } | |
765 | ||
766 | /* | |
767 | * err_unshelve_state restores the error state that was returned | |
768 | * by err_shelve_state previously. | |
769 | */ | |
770 | void err_unshelve_state(void* state) | |
771 | { | |
772 | if (state != (void*)-1) | |
773 | CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state); | |
774 | } | |
775 | ||
6b691a5c | 776 | int ERR_get_next_error_library(void) |
0f113f3e | 777 | { |
3e47caff RS |
778 | int ret; |
779 | ||
eb2b9892 | 780 | if (!RUN_ONCE(&err_string_init, do_err_strings_init)) |
c2e4e5d2 | 781 | return 0; |
7b8e12d2 AG |
782 | |
783 | CRYPTO_THREAD_write_lock(err_string_lock); | |
3e47caff | 784 | ret = int_err_library_number++; |
7b8e12d2 | 785 | CRYPTO_THREAD_unlock(err_string_lock); |
3e47caff | 786 | return ret; |
0f113f3e | 787 | } |
58964a49 | 788 | |
10f8b368 RL |
789 | static int err_set_error_data_int(char *data, size_t size, int flags, |
790 | int deallocate) | |
0f113f3e MC |
791 | { |
792 | ERR_STATE *es; | |
58964a49 | 793 | |
e5d4233f | 794 | es = err_get_state_int(); |
4fc426b7 | 795 | if (es == NULL) |
fa6b1ee1 | 796 | return 0; |
58964a49 | 797 | |
10f8b368 | 798 | err_clear_data(es, es->top, deallocate); |
8a4dc425 | 799 | err_set_data(es, es->top, data, size, flags); |
fa6b1ee1 MC |
800 | |
801 | return 1; | |
802 | } | |
803 | ||
804 | void ERR_set_error_data(char *data, int flags) | |
805 | { | |
806 | /* | |
807 | * This function is void so we cannot propagate the error return. Since it | |
808 | * is also in the public API we can't change the return type. | |
10f8b368 RL |
809 | * |
810 | * We estimate the size of the data. If it's not flagged as allocated, | |
811 | * then this is safe, and if it is flagged as allocated, then our size | |
812 | * may be smaller than the actual allocation, but that doesn't matter | |
813 | * too much, the buffer will remain untouched or will eventually be | |
814 | * reallocated to a new size. | |
815 | * | |
816 | * callers should be advised that this function takes over ownership of | |
817 | * the allocated memory, i.e. they can't count on the pointer to remain | |
818 | * valid. | |
fa6b1ee1 | 819 | */ |
10f8b368 | 820 | err_set_error_data_int(data, strlen(data) + 1, flags, 1); |
0f113f3e | 821 | } |
58964a49 | 822 | |
4565c3e3 | 823 | void ERR_add_error_data(int num, ...) |
0f113f3e MC |
824 | { |
825 | va_list args; | |
826 | va_start(args, num); | |
827 | ERR_add_error_vdata(num, args); | |
828 | va_end(args); | |
829 | } | |
78c45722 DSH |
830 | |
831 | void ERR_add_error_vdata(int num, va_list args) | |
0f113f3e | 832 | { |
8908d18c | 833 | int i, len, size; |
10f8b368 RL |
834 | int flags = ERR_TXT_MALLOCED | ERR_TXT_STRING; |
835 | char *str, *arg; | |
8908d18c RS |
836 | ERR_STATE *es; |
837 | ||
838 | /* Get the current error data; if an allocated string get it. */ | |
e5d4233f | 839 | es = err_get_state_int(); |
8908d18c RS |
840 | if (es == NULL) |
841 | return; | |
842 | i = es->top; | |
0f113f3e | 843 | |
10f8b368 RL |
844 | /* |
845 | * If err_data is allocated already, re-use the space. | |
846 | * Otherwise, allocate a small new buffer. | |
847 | */ | |
848 | if ((es->err_data_flags[i] & flags) == flags) { | |
849 | str = es->err_data[i]; | |
850 | size = es->err_data_size[i]; | |
851 | ||
852 | /* | |
853 | * To protect the string we just grabbed from tampering by other | |
854 | * functions we may call, or to protect them from freeing a pointer | |
855 | * that may no longer be valid at that point, we clear away the | |
856 | * data pointer and the flags. We will set them again at the end | |
857 | * of this function. | |
858 | */ | |
859 | es->err_data[i] = NULL; | |
860 | es->err_data_flags[i] = 0; | |
861 | } else if ((str = OPENSSL_malloc(size = 81)) == NULL) { | |
0f113f3e | 862 | return; |
10f8b368 RL |
863 | } else { |
864 | str[0] = '\0'; | |
cdb10bae | 865 | } |
10f8b368 | 866 | len = strlen(str); |
8908d18c | 867 | |
51fe9b00 | 868 | while (--num >= 0) { |
8908d18c RS |
869 | arg = va_arg(args, char *); |
870 | if (arg == NULL) | |
871 | arg = "<NULL>"; | |
872 | len += strlen(arg); | |
189dbdd9 | 873 | if (len >= size) { |
10f8b368 RL |
874 | char *p; |
875 | ||
8908d18c | 876 | size = len + 20; |
189dbdd9 | 877 | p = OPENSSL_realloc(str, size); |
0791bef0 RS |
878 | if (p == NULL) { |
879 | OPENSSL_free(str); | |
880 | return; | |
0f113f3e | 881 | } |
0791bef0 | 882 | str = p; |
0f113f3e | 883 | } |
189dbdd9 | 884 | OPENSSL_strlcat(str, arg, (size_t)size); |
0f113f3e | 885 | } |
10f8b368 | 886 | if (!err_set_error_data_int(str, size, flags, 0)) |
fa6b1ee1 | 887 | OPENSSL_free(str); |
0f113f3e | 888 | } |
54f64516 RL |
889 | |
890 | int ERR_set_mark(void) | |
0f113f3e MC |
891 | { |
892 | ERR_STATE *es; | |
54f64516 | 893 | |
e5d4233f | 894 | es = err_get_state_int(); |
4fc426b7 BE |
895 | if (es == NULL) |
896 | return 0; | |
54f64516 | 897 | |
0f113f3e MC |
898 | if (es->bottom == es->top) |
899 | return 0; | |
900 | es->err_flags[es->top] |= ERR_FLAG_MARK; | |
901 | return 1; | |
902 | } | |
54f64516 RL |
903 | |
904 | int ERR_pop_to_mark(void) | |
0f113f3e MC |
905 | { |
906 | ERR_STATE *es; | |
907 | ||
e5d4233f | 908 | es = err_get_state_int(); |
4fc426b7 BE |
909 | if (es == NULL) |
910 | return 0; | |
0f113f3e MC |
911 | |
912 | while (es->bottom != es->top | |
913 | && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) { | |
10f8b368 | 914 | err_clear(es, es->top, 0); |
8909c2ce | 915 | es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1; |
0f113f3e MC |
916 | } |
917 | ||
918 | if (es->bottom == es->top) | |
919 | return 0; | |
920 | es->err_flags[es->top] &= ~ERR_FLAG_MARK; | |
921 | return 1; | |
922 | } | |
e1a4ff76 RL |
923 | |
924 | int ERR_clear_last_mark(void) | |
925 | { | |
926 | ERR_STATE *es; | |
927 | int top; | |
928 | ||
e5d4233f | 929 | es = err_get_state_int(); |
e1a4ff76 RL |
930 | if (es == NULL) |
931 | return 0; | |
932 | ||
933 | top = es->top; | |
934 | while (es->bottom != top | |
935 | && (es->err_flags[top] & ERR_FLAG_MARK) == 0) { | |
8909c2ce | 936 | top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1; |
e1a4ff76 RL |
937 | } |
938 | ||
939 | if (es->bottom == top) | |
940 | return 0; | |
941 | es->err_flags[top] &= ~ERR_FLAG_MARK; | |
942 | return 1; | |
943 | } | |
f658a3b6 AP |
944 | |
945 | void err_clear_last_constant_time(int clear) | |
946 | { | |
947 | ERR_STATE *es; | |
948 | int top; | |
949 | ||
e5d4233f | 950 | es = err_get_state_int(); |
f658a3b6 AP |
951 | if (es == NULL) |
952 | return; | |
953 | ||
954 | top = es->top; | |
955 | ||
94dc53a3 BE |
956 | /* |
957 | * Flag error as cleared but remove it elsewhere to avoid two errors | |
958 | * accessing the same error stack location, revealing timing information. | |
959 | */ | |
960 | clear = constant_time_select_int(constant_time_eq_int(clear, 0), | |
961 | 0, ERR_FLAG_CLEAR); | |
962 | es->err_flags[top] |= clear; | |
f658a3b6 | 963 | } |