1 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay (at) cryptsoft.com). 6 * The implementation was written so as to conform with Netscapes SSL. 7 * 8 * This library is free for commercial and non-commercial use as long as 9 * the following conditions are aheared to. The following conditions 10 * apply to all code found in this distribution, be it the RC4, RSA, 11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 12 * included with this distribution is covered by the same copyright terms 13 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. 17 * If this package is used in a product, Eric Young should be given attribution 18 * as the author of the parts of the library used. 19 * This can be in the form of a textual message at program startup or 20 * in documentation (online or textual) provided with the package. 21 * 22 * Redistribution and use in source and binary forms, with or without 23 * modification, are permitted provided that the following conditions 24 * are met: 25 * 1. Redistributions of source code must retain the copyright 26 * notice, this list of conditions and the following disclaimer. 27 * 2. Redistributions in binary form must reproduce the above copyright 28 * notice, this list of conditions and the following disclaimer in the 29 * documentation and/or other materials provided with the distribution. 30 * 3. All advertising materials mentioning features or use of this software 31 * must display the following acknowledgement: 32 * "This product includes cryptographic software written by 33 * Eric Young (eay (at) cryptsoft.com)" 34 * The word 'cryptographic' can be left out if the rouines from the library 35 * being used are not cryptographic related :-). 36 * 4. If you include any Windows specific code (or a derivative thereof) from 37 * the apps directory (application code) you must include an acknowledgement: 38 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 50 * SUCH DAMAGE. 51 * 52 * The licence and distribution terms for any publically available version or 53 * derivative of this code cannot be changed. i.e. this code cannot simply be 54 * copied and put under another distribution licence 55 * [including the GNU Public Licence.] 56 */ 57 /* ==================================================================== 58 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved. 59 * 60 * Redistribution and use in source and binary forms, with or without 61 * modification, are permitted provided that the following conditions 62 * are met: 63 * 64 * 1. Redistributions of source code must retain the above copyright 65 * notice, this list of conditions and the following disclaimer. 66 * 67 * 2. Redistributions in binary form must reproduce the above copyright 68 * notice, this list of conditions and the following disclaimer in 69 * the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3. All advertising materials mentioning features or use of this 73 * software must display the following acknowledgment: 74 * "This product includes software developed by the OpenSSL Project 75 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 76 * 77 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 78 * endorse or promote products derived from this software without 79 * prior written permission. For written permission, please contact 80 * openssl-core (at) openssl.org. 81 * 82 * 5. Products derived from this software may not be called "OpenSSL" 83 * nor may "OpenSSL" appear in their names without prior written 84 * permission of the OpenSSL Project. 85 * 86 * 6. Redistributions of any form whatsoever must retain the following 87 * acknowledgment: 88 * "This product includes software developed by the OpenSSL Project 89 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 92 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 93 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 94 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 95 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 96 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 97 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 98 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 100 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 101 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 102 * OF THE POSSIBILITY OF SUCH DAMAGE. 103 * ==================================================================== 104 * 105 * This product includes cryptographic software written by Eric Young 106 * (eay (at) cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh (at) cryptsoft.com). */ 108 109 #include <openssl/err.h> 110 111 #include <assert.h> 112 #include <errno.h> 113 #include <inttypes.h> 114 #include <string.h> 115 116 #if defined(OPENSSL_WINDOWS) 117 OPENSSL_MSVC_PRAGMA(warning(push, 3)) 118 #include <windows.h> 119 OPENSSL_MSVC_PRAGMA(warning(pop)) 120 #endif 121 122 #include <openssl/mem.h> 123 #include <openssl/thread.h> 124 125 #include "../internal.h" 126 127 128 extern const uint32_t kOpenSSLReasonValues[]; 129 extern const size_t kOpenSSLReasonValuesLen; 130 extern const char kOpenSSLReasonStringData[]; 131 132 /* err_clear_data frees the optional |data| member of the given error. */ 133 static void err_clear_data(struct err_error_st *error) { 134 if ((error->flags & ERR_FLAG_MALLOCED) != 0) { 135 OPENSSL_free(error->data); 136 } 137 error->data = NULL; 138 error->flags &= ~ERR_FLAG_MALLOCED; 139 } 140 141 /* err_clear clears the given queued error. */ 142 static void err_clear(struct err_error_st *error) { 143 err_clear_data(error); 144 OPENSSL_memset(error, 0, sizeof(struct err_error_st)); 145 } 146 147 /* global_next_library contains the next custom library value to return. */ 148 static int global_next_library = ERR_NUM_LIBS; 149 150 /* global_next_library_mutex protects |global_next_library| from concurrent 151 * updates. */ 152 static struct CRYPTO_STATIC_MUTEX global_next_library_mutex = 153 CRYPTO_STATIC_MUTEX_INIT; 154 155 static void err_state_free(void *statep) { 156 ERR_STATE *state = statep; 157 158 if (state == NULL) { 159 return; 160 } 161 162 unsigned i; 163 for (i = 0; i < ERR_NUM_ERRORS; i++) { 164 err_clear(&state->errors[i]); 165 } 166 OPENSSL_free(state->to_free); 167 OPENSSL_free(state); 168 } 169 170 /* err_get_state gets the ERR_STATE object for the current thread. */ 171 static ERR_STATE *err_get_state(void) { 172 ERR_STATE *state = CRYPTO_get_thread_local(OPENSSL_THREAD_LOCAL_ERR); 173 if (state == NULL) { 174 state = OPENSSL_malloc(sizeof(ERR_STATE)); 175 if (state == NULL) { 176 return NULL; 177 } 178 OPENSSL_memset(state, 0, sizeof(ERR_STATE)); 179 if (!CRYPTO_set_thread_local(OPENSSL_THREAD_LOCAL_ERR, state, 180 err_state_free)) { 181 return NULL; 182 } 183 } 184 185 return state; 186 } 187 188 static uint32_t get_error_values(int inc, int top, const char **file, int *line, 189 const char **data, int *flags) { 190 unsigned i = 0; 191 ERR_STATE *state; 192 struct err_error_st *error; 193 uint32_t ret; 194 195 state = err_get_state(); 196 if (state == NULL || state->bottom == state->top) { 197 return 0; 198 } 199 200 if (top) { 201 assert(!inc); 202 /* last error */ 203 i = state->top; 204 } else { 205 i = (state->bottom + 1) % ERR_NUM_ERRORS; 206 } 207 208 error = &state->errors[i]; 209 ret = error->packed; 210 211 if (file != NULL && line != NULL) { 212 if (error->file == NULL) { 213 *file = "NA"; 214 *line = 0; 215 } else { 216 *file = error->file; 217 *line = error->line; 218 } 219 } 220 221 if (data != NULL) { 222 if (error->data == NULL) { 223 *data = ""; 224 if (flags != NULL) { 225 *flags = 0; 226 } 227 } else { 228 *data = error->data; 229 if (flags != NULL) { 230 *flags = error->flags & ERR_FLAG_PUBLIC_MASK; 231 } 232 /* If this error is being removed, take ownership of data from 233 * the error. The semantics are such that the caller doesn't 234 * take ownership either. Instead the error system takes 235 * ownership and retains it until the next call that affects the 236 * error queue. */ 237 if (inc) { 238 if (error->flags & ERR_FLAG_MALLOCED) { 239 OPENSSL_free(state->to_free); 240 state->to_free = error->data; 241 } 242 error->data = NULL; 243 error->flags = 0; 244 } 245 } 246 } 247 248 if (inc) { 249 assert(!top); 250 err_clear(error); 251 state->bottom = i; 252 } 253 254 return ret; 255 } 256 257 uint32_t ERR_get_error(void) { 258 return get_error_values(1 /* inc */, 0 /* bottom */, NULL, NULL, NULL, NULL); 259 } 260 261 uint32_t ERR_get_error_line(const char **file, int *line) { 262 return get_error_values(1 /* inc */, 0 /* bottom */, file, line, NULL, NULL); 263 } 264 265 uint32_t ERR_get_error_line_data(const char **file, int *line, 266 const char **data, int *flags) { 267 return get_error_values(1 /* inc */, 0 /* bottom */, file, line, data, flags); 268 } 269 270 uint32_t ERR_peek_error(void) { 271 return get_error_values(0 /* peek */, 0 /* bottom */, NULL, NULL, NULL, NULL); 272 } 273 274 uint32_t ERR_peek_error_line(const char **file, int *line) { 275 return get_error_values(0 /* peek */, 0 /* bottom */, file, line, NULL, NULL); 276 } 277 278 uint32_t ERR_peek_error_line_data(const char **file, int *line, 279 const char **data, int *flags) { 280 return get_error_values(0 /* peek */, 0 /* bottom */, file, line, data, 281 flags); 282 } 283 284 uint32_t ERR_peek_last_error(void) { 285 return get_error_values(0 /* peek */, 1 /* top */, NULL, NULL, NULL, NULL); 286 } 287 288 uint32_t ERR_peek_last_error_line(const char **file, int *line) { 289 return get_error_values(0 /* peek */, 1 /* top */, file, line, NULL, NULL); 290 } 291 292 uint32_t ERR_peek_last_error_line_data(const char **file, int *line, 293 const char **data, int *flags) { 294 return get_error_values(0 /* peek */, 1 /* top */, file, line, data, flags); 295 } 296 297 void ERR_clear_error(void) { 298 ERR_STATE *const state = err_get_state(); 299 unsigned i; 300 301 if (state == NULL) { 302 return; 303 } 304 305 for (i = 0; i < ERR_NUM_ERRORS; i++) { 306 err_clear(&state->errors[i]); 307 } 308 OPENSSL_free(state->to_free); 309 state->to_free = NULL; 310 311 state->top = state->bottom = 0; 312 } 313 314 void ERR_remove_thread_state(const CRYPTO_THREADID *tid) { 315 if (tid != NULL) { 316 assert(0); 317 return; 318 } 319 320 ERR_clear_error(); 321 } 322 323 int ERR_get_next_error_library(void) { 324 int ret; 325 326 CRYPTO_STATIC_MUTEX_lock_write(&global_next_library_mutex); 327 ret = global_next_library++; 328 CRYPTO_STATIC_MUTEX_unlock_write(&global_next_library_mutex); 329 330 return ret; 331 } 332 333 void ERR_remove_state(unsigned long pid) { 334 ERR_clear_error(); 335 } 336 337 void ERR_clear_system_error(void) { 338 errno = 0; 339 } 340 341 char *ERR_error_string(uint32_t packed_error, char *ret) { 342 static char buf[ERR_ERROR_STRING_BUF_LEN]; 343 344 if (ret == NULL) { 345 /* TODO(fork): remove this. */ 346 ret = buf; 347 } 348 349 #if !defined(NDEBUG) 350 /* This is aimed to help catch callers who don't provide 351 * |ERR_ERROR_STRING_BUF_LEN| bytes of space. */ 352 OPENSSL_memset(ret, 0, ERR_ERROR_STRING_BUF_LEN); 353 #endif 354 355 ERR_error_string_n(packed_error, ret, ERR_ERROR_STRING_BUF_LEN); 356 357 return ret; 358 } 359 360 void ERR_error_string_n(uint32_t packed_error, char *buf, size_t len) { 361 char lib_buf[64], reason_buf[64]; 362 const char *lib_str, *reason_str; 363 unsigned lib, reason; 364 365 if (len == 0) { 366 return; 367 } 368 369 lib = ERR_GET_LIB(packed_error); 370 reason = ERR_GET_REASON(packed_error); 371 372 lib_str = ERR_lib_error_string(packed_error); 373 reason_str = ERR_reason_error_string(packed_error); 374 375 if (lib_str == NULL) { 376 BIO_snprintf(lib_buf, sizeof(lib_buf), "lib(%u)", lib); 377 lib_str = lib_buf; 378 } 379 380 if (reason_str == NULL) { 381 BIO_snprintf(reason_buf, sizeof(reason_buf), "reason(%u)", reason); 382 reason_str = reason_buf; 383 } 384 385 BIO_snprintf(buf, len, "error:%08" PRIx32 ":%s:OPENSSL_internal:%s", 386 packed_error, lib_str, reason_str); 387 388 if (strlen(buf) == len - 1) { 389 /* output may be truncated; make sure we always have 5 colon-separated 390 * fields, i.e. 4 colons. */ 391 static const unsigned num_colons = 4; 392 unsigned i; 393 char *s = buf; 394 395 if (len <= num_colons) { 396 /* In this situation it's not possible to ensure that the correct number 397 * of colons are included in the output. */ 398 return; 399 } 400 401 for (i = 0; i < num_colons; i++) { 402 char *colon = strchr(s, ':'); 403 char *last_pos = &buf[len - 1] - num_colons + i; 404 405 if (colon == NULL || colon > last_pos) { 406 /* set colon |i| at last possible position (buf[len-1] is the 407 * terminating 0). If we're setting this colon, then all whole of the 408 * rest of the string must be colons in order to have the correct 409 * number. */ 410 OPENSSL_memset(last_pos, ':', num_colons - i); 411 break; 412 } 413 414 s = colon + 1; 415 } 416 } 417 } 418 419 // err_string_cmp is a compare function for searching error values with 420 // |bsearch| in |err_string_lookup|. 421 static int err_string_cmp(const void *a, const void *b) { 422 const uint32_t a_key = *((const uint32_t*) a) >> 15; 423 const uint32_t b_key = *((const uint32_t*) b) >> 15; 424 425 if (a_key < b_key) { 426 return -1; 427 } else if (a_key > b_key) { 428 return 1; 429 } else { 430 return 0; 431 } 432 } 433 434 /* err_string_lookup looks up the string associated with |lib| and |key| in 435 * |values| and |string_data|. It returns the string or NULL if not found. */ 436 static const char *err_string_lookup(uint32_t lib, uint32_t key, 437 const uint32_t *values, 438 size_t num_values, 439 const char *string_data) { 440 /* |values| points to data in err_data.h, which is generated by 441 * err_data_generate.go. It's an array of uint32_t values. Each value has the 442 * following structure: 443 * | lib | key | offset | 444 * |6 bits| 11 bits | 15 bits | 445 * 446 * The |lib| value is a library identifier: one of the |ERR_LIB_*| values. 447 * The |key| is a reason code, depending on the context. 448 * The |offset| is the number of bytes from the start of |string_data| where 449 * the (NUL terminated) string for this value can be found. 450 * 451 * Values are sorted based on treating the |lib| and |key| part as an 452 * unsigned integer. */ 453 if (lib >= (1 << 6) || key >= (1 << 11)) { 454 return NULL; 455 } 456 uint32_t search_key = lib << 26 | key << 15; 457 const uint32_t *result = bsearch(&search_key, values, num_values, 458 sizeof(uint32_t), err_string_cmp); 459 if (result == NULL) { 460 return NULL; 461 } 462 463 return &string_data[(*result) & 0x7fff]; 464 } 465 466 static const char *const kLibraryNames[ERR_NUM_LIBS] = { 467 "invalid library (0)", 468 "unknown library", /* ERR_LIB_NONE */ 469 "system library", /* ERR_LIB_SYS */ 470 "bignum routines", /* ERR_LIB_BN */ 471 "RSA routines", /* ERR_LIB_RSA */ 472 "Diffie-Hellman routines", /* ERR_LIB_DH */ 473 "public key routines", /* ERR_LIB_EVP */ 474 "memory buffer routines", /* ERR_LIB_BUF */ 475 "object identifier routines", /* ERR_LIB_OBJ */ 476 "PEM routines", /* ERR_LIB_PEM */ 477 "DSA routines", /* ERR_LIB_DSA */ 478 "X.509 certificate routines", /* ERR_LIB_X509 */ 479 "ASN.1 encoding routines", /* ERR_LIB_ASN1 */ 480 "configuration file routines", /* ERR_LIB_CONF */ 481 "common libcrypto routines", /* ERR_LIB_CRYPTO */ 482 "elliptic curve routines", /* ERR_LIB_EC */ 483 "SSL routines", /* ERR_LIB_SSL */ 484 "BIO routines", /* ERR_LIB_BIO */ 485 "PKCS7 routines", /* ERR_LIB_PKCS7 */ 486 "PKCS8 routines", /* ERR_LIB_PKCS8 */ 487 "X509 V3 routines", /* ERR_LIB_X509V3 */ 488 "random number generator", /* ERR_LIB_RAND */ 489 "ENGINE routines", /* ERR_LIB_ENGINE */ 490 "OCSP routines", /* ERR_LIB_OCSP */ 491 "UI routines", /* ERR_LIB_UI */ 492 "COMP routines", /* ERR_LIB_COMP */ 493 "ECDSA routines", /* ERR_LIB_ECDSA */ 494 "ECDH routines", /* ERR_LIB_ECDH */ 495 "HMAC routines", /* ERR_LIB_HMAC */ 496 "Digest functions", /* ERR_LIB_DIGEST */ 497 "Cipher functions", /* ERR_LIB_CIPHER */ 498 "HKDF functions", /* ERR_LIB_HKDF */ 499 "User defined functions", /* ERR_LIB_USER */ 500 }; 501 502 const char *ERR_lib_error_string(uint32_t packed_error) { 503 const uint32_t lib = ERR_GET_LIB(packed_error); 504 505 if (lib >= ERR_NUM_LIBS) { 506 return NULL; 507 } 508 return kLibraryNames[lib]; 509 } 510 511 const char *ERR_func_error_string(uint32_t packed_error) { 512 return "OPENSSL_internal"; 513 } 514 515 const char *ERR_reason_error_string(uint32_t packed_error) { 516 const uint32_t lib = ERR_GET_LIB(packed_error); 517 const uint32_t reason = ERR_GET_REASON(packed_error); 518 519 if (lib == ERR_LIB_SYS) { 520 if (reason < 127) { 521 return strerror(reason); 522 } 523 return NULL; 524 } 525 526 if (reason < ERR_NUM_LIBS) { 527 return kLibraryNames[reason]; 528 } 529 530 if (reason < 100) { 531 switch (reason) { 532 case ERR_R_MALLOC_FAILURE: 533 return "malloc failure"; 534 case ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED: 535 return "function should not have been called"; 536 case ERR_R_PASSED_NULL_PARAMETER: 537 return "passed a null parameter"; 538 case ERR_R_INTERNAL_ERROR: 539 return "internal error"; 540 case ERR_R_OVERFLOW: 541 return "overflow"; 542 default: 543 return NULL; 544 } 545 } 546 547 return err_string_lookup(lib, reason, kOpenSSLReasonValues, 548 kOpenSSLReasonValuesLen, kOpenSSLReasonStringData); 549 } 550 551 void ERR_print_errors_cb(ERR_print_errors_callback_t callback, void *ctx) { 552 char buf[ERR_ERROR_STRING_BUF_LEN]; 553 char buf2[1024]; 554 const char *file, *data; 555 int line, flags; 556 uint32_t packed_error; 557 558 /* thread_hash is the least-significant bits of the |ERR_STATE| pointer value 559 * for this thread. */ 560 const unsigned long thread_hash = (uintptr_t) err_get_state(); 561 562 for (;;) { 563 packed_error = ERR_get_error_line_data(&file, &line, &data, &flags); 564 if (packed_error == 0) { 565 break; 566 } 567 568 ERR_error_string_n(packed_error, buf, sizeof(buf)); 569 BIO_snprintf(buf2, sizeof(buf2), "%lu:%s:%s:%d:%s\n", thread_hash, buf, 570 file, line, (flags & ERR_FLAG_STRING) ? data : ""); 571 if (callback(buf2, strlen(buf2), ctx) <= 0) { 572 break; 573 } 574 } 575 } 576 577 static int print_errors_to_file(const char* msg, size_t msg_len, void* ctx) { 578 assert(msg[msg_len] == '\0'); 579 FILE* fp = ctx; 580 int res = fputs(msg, fp); 581 return res < 0 ? 0 : 1; 582 } 583 584 void ERR_print_errors_fp(FILE *file) { 585 ERR_print_errors_cb(print_errors_to_file, file); 586 } 587 588 /* err_set_error_data sets the data on the most recent error. The |flags| 589 * argument is a combination of the |ERR_FLAG_*| values. */ 590 static void err_set_error_data(char *data, int flags) { 591 ERR_STATE *const state = err_get_state(); 592 struct err_error_st *error; 593 594 if (state == NULL || state->top == state->bottom) { 595 if (flags & ERR_FLAG_MALLOCED) { 596 OPENSSL_free(data); 597 } 598 return; 599 } 600 601 error = &state->errors[state->top]; 602 603 err_clear_data(error); 604 error->data = data; 605 error->flags = flags; 606 } 607 608 void ERR_put_error(int library, int unused, int reason, const char *file, 609 unsigned line) { 610 ERR_STATE *const state = err_get_state(); 611 struct err_error_st *error; 612 613 if (state == NULL) { 614 return; 615 } 616 617 if (library == ERR_LIB_SYS && reason == 0) { 618 #if defined(OPENSSL_WINDOWS) 619 reason = GetLastError(); 620 #else 621 reason = errno; 622 #endif 623 } 624 625 state->top = (state->top + 1) % ERR_NUM_ERRORS; 626 if (state->top == state->bottom) { 627 state->bottom = (state->bottom + 1) % ERR_NUM_ERRORS; 628 } 629 630 error = &state->errors[state->top]; 631 err_clear(error); 632 error->file = file; 633 error->line = line; 634 error->packed = ERR_PACK(library, reason); 635 } 636 637 /* ERR_add_error_data_vdata takes a variable number of const char* pointers, 638 * concatenates them and sets the result as the data on the most recent 639 * error. */ 640 static void err_add_error_vdata(unsigned num, va_list args) { 641 size_t alloced, new_len, len = 0, substr_len; 642 char *buf; 643 const char *substr; 644 unsigned i; 645 646 alloced = 80; 647 buf = OPENSSL_malloc(alloced + 1); 648 if (buf == NULL) { 649 return; 650 } 651 652 for (i = 0; i < num; i++) { 653 substr = va_arg(args, const char *); 654 if (substr == NULL) { 655 continue; 656 } 657 658 substr_len = strlen(substr); 659 new_len = len + substr_len; 660 if (new_len > alloced) { 661 char *new_buf; 662 663 if (alloced + 20 + 1 < alloced) { 664 /* overflow. */ 665 OPENSSL_free(buf); 666 return; 667 } 668 669 alloced = new_len + 20; 670 new_buf = OPENSSL_realloc(buf, alloced + 1); 671 if (new_buf == NULL) { 672 OPENSSL_free(buf); 673 return; 674 } 675 buf = new_buf; 676 } 677 678 OPENSSL_memcpy(buf + len, substr, substr_len); 679 len = new_len; 680 } 681 682 buf[len] = 0; 683 err_set_error_data(buf, ERR_FLAG_MALLOCED | ERR_FLAG_STRING); 684 } 685 686 void ERR_add_error_data(unsigned count, ...) { 687 va_list args; 688 va_start(args, count); 689 err_add_error_vdata(count, args); 690 va_end(args); 691 } 692 693 void ERR_add_error_dataf(const char *format, ...) { 694 va_list ap; 695 char *buf; 696 static const unsigned buf_len = 256; 697 698 /* A fixed-size buffer is used because va_copy (which would be needed in 699 * order to call vsnprintf twice and measure the buffer) wasn't defined until 700 * C99. */ 701 buf = OPENSSL_malloc(buf_len + 1); 702 if (buf == NULL) { 703 return; 704 } 705 706 va_start(ap, format); 707 BIO_vsnprintf(buf, buf_len, format, ap); 708 buf[buf_len] = 0; 709 va_end(ap); 710 711 err_set_error_data(buf, ERR_FLAG_MALLOCED | ERR_FLAG_STRING); 712 } 713 714 int ERR_set_mark(void) { 715 ERR_STATE *const state = err_get_state(); 716 717 if (state == NULL || state->bottom == state->top) { 718 return 0; 719 } 720 state->errors[state->top].flags |= ERR_FLAG_MARK; 721 return 1; 722 } 723 724 int ERR_pop_to_mark(void) { 725 ERR_STATE *const state = err_get_state(); 726 727 if (state == NULL) { 728 return 0; 729 } 730 731 while (state->bottom != state->top) { 732 struct err_error_st *error = &state->errors[state->top]; 733 734 if ((error->flags & ERR_FLAG_MARK) != 0) { 735 error->flags &= ~ERR_FLAG_MARK; 736 return 1; 737 } 738 739 err_clear(error); 740 if (state->top == 0) { 741 state->top = ERR_NUM_ERRORS - 1; 742 } else { 743 state->top--; 744 } 745 } 746 747 return 0; 748 } 749 750 void ERR_load_crypto_strings(void) {} 751 752 void ERR_free_strings(void) {} 753 754 void ERR_load_BIO_strings(void) {} 755 756 void ERR_load_ERR_strings(void) {} 757
