1/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 * All rights reserved. 3 * 4 * This package is an SSL implementation written 5 * by Eric Young (eay@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@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@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@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@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@cryptsoft.com). This product includes software written by Tim 107 * Hudson (tjh@cryptsoft.com). */ 108 109#ifndef OPENSSL_HEADER_ERR_H 110#define OPENSSL_HEADER_ERR_H 111 112#include <stdio.h> 113 114#include <openssl/base.h> 115 116#if defined(__cplusplus) 117extern "C" { 118#endif 119 120 121/* Error queue handling functions. 122 * 123 * Errors in OpenSSL are generally signaled by the return value of a function. 124 * When a function fails it may add an entry to a per-thread error queue, 125 * which is managed by the functions in this header. 126 * 127 * Each error contains: 128 * 1) The library (i.e. ec, pem, rsa) which created it. 129 * 2) The file and line number of the call that added the error. 130 * 3) A pointer to some error specific data, which may be NULL. 131 * 132 * The library identifier and reason code are packed in a uint32_t and there 133 * exist various functions for unpacking it. 134 * 135 * The typical behaviour is that an error will occur deep in a call queue and 136 * that code will push an error onto the error queue. As the error queue 137 * unwinds, other functions will push their own errors. Thus, the "least 138 * recent" error is the most specific and the other errors will provide a 139 * backtrace of sorts. */ 140 141 142/* Startup and shutdown. */ 143 144/* ERR_load_BIO_strings does nothing. 145 * 146 * TODO(fork): remove. libjingle calls this. */ 147OPENSSL_EXPORT void ERR_load_BIO_strings(void); 148 149/* ERR_load_ERR_strings does nothing. */ 150OPENSSL_EXPORT void ERR_load_ERR_strings(void); 151 152/* ERR_load_crypto_strings does nothing. */ 153OPENSSL_EXPORT void ERR_load_crypto_strings(void); 154 155/* ERR_free_strings does nothing. */ 156OPENSSL_EXPORT void ERR_free_strings(void); 157 158 159/* Reading and formatting errors. */ 160 161/* ERR_get_error gets the packed error code for the least recent error and 162 * removes that error from the queue. If there are no errors in the queue then 163 * it returns zero. */ 164OPENSSL_EXPORT uint32_t ERR_get_error(void); 165 166/* ERR_get_error_line acts like |ERR_get_error|, except that the file and line 167 * number of the call that added the error are also returned. */ 168OPENSSL_EXPORT uint32_t ERR_get_error_line(const char **file, int *line); 169 170/* ERR_get_error_line_data acts like |ERR_get_error_line|, but also returns the 171 * error-specific data pointer and flags. The flags are a bitwise-OR of 172 * |ERR_FLAG_*| values. The error-specific data is owned by the error queue 173 * and the pointer becomes invalid after the next call that affects the same 174 * thread's error queue. If |*flags| contains |ERR_FLAG_STRING| then |*data| is 175 * human-readable. */ 176OPENSSL_EXPORT uint32_t ERR_get_error_line_data(const char **file, int *line, 177 const char **data, int *flags); 178 179/* The "peek" functions act like the |ERR_get_error| functions, above, but they 180 * do not remove the error from the queue. */ 181OPENSSL_EXPORT uint32_t ERR_peek_error(void); 182OPENSSL_EXPORT uint32_t ERR_peek_error_line(const char **file, int *line); 183OPENSSL_EXPORT uint32_t ERR_peek_error_line_data(const char **file, int *line, 184 const char **data, int *flags); 185 186/* The "peek last" functions act like the "peek" functions, above, except that 187 * they return the most recent error. */ 188OPENSSL_EXPORT uint32_t ERR_peek_last_error(void); 189OPENSSL_EXPORT uint32_t ERR_peek_last_error_line(const char **file, int *line); 190OPENSSL_EXPORT uint32_t ERR_peek_last_error_line_data(const char **file, 191 int *line, 192 const char **data, 193 int *flags); 194 195/* ERR_error_string_n generates a human-readable string representing 196 * |packed_error| and places it at |buf|. It writes at most |len| bytes 197 * (including the terminating NUL) and truncates the string if necessary. If 198 * |len| is greater than zero then |buf| is always NUL terminated. 199 * 200 * The string will have the following format: 201 * 202 * error:[error code]:[library name]:OPENSSL_internal:[reason string] 203 * 204 * error code is an 8 digit hexadecimal number; library name and reason string 205 * are ASCII text. */ 206OPENSSL_EXPORT void ERR_error_string_n(uint32_t packed_error, char *buf, 207 size_t len); 208 209/* ERR_lib_error_string returns a string representation of the library that 210 * generated |packed_error|. */ 211OPENSSL_EXPORT const char *ERR_lib_error_string(uint32_t packed_error); 212 213/* ERR_reason_error_string returns a string representation of the reason for 214 * |packed_error|. */ 215OPENSSL_EXPORT const char *ERR_reason_error_string(uint32_t packed_error); 216 217/* ERR_print_errors_callback_t is the type of a function used by 218 * |ERR_print_errors_cb|. It takes a pointer to a human readable string (and 219 * its length) that describes an entry in the error queue. The |ctx| argument 220 * is an opaque pointer given to |ERR_print_errors_cb|. 221 * 222 * It should return one on success or zero on error, which will stop the 223 * iteration over the error queue. */ 224typedef int (*ERR_print_errors_callback_t)(const char *str, size_t len, 225 void *ctx); 226 227/* ERR_print_errors_cb calls |callback| with a string representation of each 228 * error in the current thread's error queue, from the least recent to the most 229 * recent error. 230 * 231 * The string will have the following format (which differs from 232 * |ERR_error_string|): 233 * 234 * [thread id]:error:[error code]:[library name]:OPENSSL_internal: 235 * [reason string]:[file]:[line number]:[optional string data] 236 * 237 * (All in one line.) 238 * 239 * The callback can return one to continue the iteration or zero to stop it. 240 * The |ctx| argument is an opaque value that is passed through to the 241 * callback. */ 242OPENSSL_EXPORT void ERR_print_errors_cb(ERR_print_errors_callback_t callback, 243 void *ctx); 244 245/* ERR_print_errors_fp prints the current contents of the error stack to |file| 246 * using human readable strings where possible. */ 247OPENSSL_EXPORT void ERR_print_errors_fp(FILE *file); 248 249 250/* Clearing errors. */ 251 252/* ERR_clear_error clears the error queue for the current thread. */ 253OPENSSL_EXPORT void ERR_clear_error(void); 254 255/* ERR_remove_thread_state clears the error queue for the current thread if 256 * |tid| is NULL. Otherwise it calls |assert(0)|, because it's no longer 257 * possible to delete the error queue for other threads. 258 * 259 * Error queues are thread-local data and are deleted automatically. You do not 260 * need to call this function. Use |ERR_clear_error|. */ 261OPENSSL_EXPORT void ERR_remove_thread_state(const CRYPTO_THREADID *tid); 262 263 264/* Custom errors. */ 265 266/* ERR_get_next_error_library returns a value suitable for passing as the 267 * |library| argument to |ERR_put_error|. This is intended for code that wishes 268 * to push its own, non-standard errors to the error queue. */ 269OPENSSL_EXPORT int ERR_get_next_error_library(void); 270 271 272/* Deprecated functions. */ 273 274/* ERR_remove_state calls |ERR_clear_error|. */ 275OPENSSL_EXPORT void ERR_remove_state(unsigned long pid); 276 277/* ERR_func_error_string returns the string "OPENSSL_internal". */ 278OPENSSL_EXPORT const char *ERR_func_error_string(uint32_t packed_error); 279 280/* ERR_error_string behaves like |ERR_error_string_n| but |len| is implicitly 281 * |ERR_ERROR_STRING_BUF_LEN| and it returns |buf|. If |buf| is NULL, the error 282 * string is placed in a static buffer which is returned. (The static buffer may 283 * be overridden by concurrent calls in other threads so this form should not be 284 * used.) 285 * 286 * Use |ERR_error_string_n| instead. 287 * 288 * TODO(fork): remove this function. */ 289OPENSSL_EXPORT char *ERR_error_string(uint32_t packed_error, char *buf); 290#define ERR_ERROR_STRING_BUF_LEN 256 291 292 293/* Private functions. */ 294 295/* ERR_clear_system_error clears the system's error value (i.e. errno). */ 296OPENSSL_EXPORT void ERR_clear_system_error(void); 297 298/* OPENSSL_PUT_ERROR is used by OpenSSL code to add an error to the error 299 * queue. */ 300#define OPENSSL_PUT_ERROR(library, reason) \ 301 ERR_put_error(ERR_LIB_##library, 0, reason, __FILE__, __LINE__) 302 303/* OPENSSL_PUT_SYSTEM_ERROR is used by OpenSSL code to add an error from the 304 * operating system to the error queue. 305 * TODO(fork): include errno. */ 306#define OPENSSL_PUT_SYSTEM_ERROR() \ 307 ERR_put_error(ERR_LIB_SYS, 0, 0, __FILE__, __LINE__); 308 309/* ERR_put_error adds an error to the error queue, dropping the least recent 310 * error if necessary for space reasons. */ 311OPENSSL_EXPORT void ERR_put_error(int library, int unused, int reason, 312 const char *file, unsigned line); 313 314/* ERR_add_error_data takes a variable number (|count|) of const char* 315 * pointers, concatenates them and sets the result as the data on the most 316 * recent error. */ 317OPENSSL_EXPORT void ERR_add_error_data(unsigned count, ...); 318 319/* ERR_add_error_dataf takes a printf-style format and arguments, and sets the 320 * result as the data on the most recent error. */ 321OPENSSL_EXPORT void ERR_add_error_dataf(const char *format, ...) 322 OPENSSL_PRINTF_FORMAT_FUNC(1, 2); 323 324/* ERR_set_mark "marks" the most recent error for use with |ERR_pop_to_mark|. 325 * It returns one if an error was marked and zero if there are no errors. */ 326OPENSSL_EXPORT int ERR_set_mark(void); 327 328/* ERR_pop_to_mark removes errors from the most recent to the least recent 329 * until (and not including) a "marked" error. It returns zero if no marked 330 * error was found (and thus all errors were removed) and one otherwise. Errors 331 * are marked using |ERR_set_mark|. */ 332OPENSSL_EXPORT int ERR_pop_to_mark(void); 333 334struct err_error_st { 335 /* file contains the filename where the error occurred. */ 336 const char *file; 337 /* data contains optional data. It must be freed with |OPENSSL_free| if 338 * |flags&ERR_FLAG_MALLOCED|. */ 339 char *data; 340 /* packed contains the error library and reason, as packed by ERR_PACK. */ 341 uint32_t packed; 342 /* line contains the line number where the error occurred. */ 343 uint16_t line; 344 /* flags contains a bitwise-OR of ERR_FLAG_* values. */ 345 uint8_t flags; 346}; 347 348/* ERR_FLAG_STRING means that the |data| member is a NUL-terminated string that 349 * can be printed. */ 350#define ERR_FLAG_STRING 1 351/* ERR_TXT_STRING is provided for compatibility with code that assumes that 352 * it's using OpenSSL. */ 353#define ERR_TXT_STRING ERR_FLAG_STRING 354 355/* ERR_FLAG_PUBLIC_MASK is applied to the flags field before it is returned 356 * from functions like |ERR_get_error_line_data|. */ 357#define ERR_FLAG_PUBLIC_MASK 0xf 358 359/* The following flag values are internal and are masked when flags are 360 * returned from functions like |ERR_get_error_line_data|. */ 361 362/* ERR_FLAG_MALLOCED means the the |data| member must be freed when no longer 363 * needed. */ 364#define ERR_FLAG_MALLOCED 16 365/* ERR_FLAG_MARK is used to indicate a reversion point in the queue. See 366 * |ERR_pop_to_mark|. */ 367#define ERR_FLAG_MARK 32 368 369/* ERR_NUM_ERRORS is the limit of the number of errors in the queue. */ 370#define ERR_NUM_ERRORS 16 371 372/* err_state_st (aka |ERR_STATE|) contains the per-thread, error queue. */ 373typedef struct err_state_st { 374 /* errors contains the ERR_NUM_ERRORS most recent errors, organised as a ring 375 * buffer. */ 376 struct err_error_st errors[ERR_NUM_ERRORS]; 377 /* top contains the index one past the most recent error. If |top| equals 378 * |bottom| then the queue is empty. */ 379 unsigned top; 380 /* bottom contains the index of the last error in the queue. */ 381 unsigned bottom; 382 383 /* to_free, if not NULL, contains a pointer owned by this structure that was 384 * previously a |data| pointer of one of the elements of |errors|. */ 385 void *to_free; 386} ERR_STATE; 387 388enum { 389 ERR_LIB_NONE = 1, 390 ERR_LIB_SYS, 391 ERR_LIB_BN, 392 ERR_LIB_RSA, 393 ERR_LIB_DH, 394 ERR_LIB_EVP, 395 ERR_LIB_BUF, 396 ERR_LIB_OBJ, 397 ERR_LIB_PEM, 398 ERR_LIB_DSA, 399 ERR_LIB_X509, 400 ERR_LIB_ASN1, 401 ERR_LIB_CONF, 402 ERR_LIB_CRYPTO, 403 ERR_LIB_EC, 404 ERR_LIB_SSL, 405 ERR_LIB_BIO, 406 ERR_LIB_PKCS7, 407 ERR_LIB_PKCS8, 408 ERR_LIB_X509V3, 409 ERR_LIB_RAND, 410 ERR_LIB_ENGINE, 411 ERR_LIB_OCSP, 412 ERR_LIB_UI, 413 ERR_LIB_COMP, 414 ERR_LIB_ECDSA, 415 ERR_LIB_ECDH, 416 ERR_LIB_HMAC, 417 ERR_LIB_DIGEST, 418 ERR_LIB_CIPHER, 419 ERR_LIB_HKDF, 420 ERR_LIB_USER, 421 ERR_NUM_LIBS 422}; 423 424#define ERR_R_SYS_LIB ERR_LIB_SYS 425#define ERR_R_BN_LIB ERR_LIB_BN 426#define ERR_R_RSA_LIB ERR_LIB_RSA 427#define ERR_R_DH_LIB ERR_LIB_DH 428#define ERR_R_EVP_LIB ERR_LIB_EVP 429#define ERR_R_BUF_LIB ERR_LIB_BUF 430#define ERR_R_OBJ_LIB ERR_LIB_OBJ 431#define ERR_R_PEM_LIB ERR_LIB_PEM 432#define ERR_R_DSA_LIB ERR_LIB_DSA 433#define ERR_R_X509_LIB ERR_LIB_X509 434#define ERR_R_ASN1_LIB ERR_LIB_ASN1 435#define ERR_R_CONF_LIB ERR_LIB_CONF 436#define ERR_R_CRYPTO_LIB ERR_LIB_CRYPTO 437#define ERR_R_EC_LIB ERR_LIB_EC 438#define ERR_R_SSL_LIB ERR_LIB_SSL 439#define ERR_R_BIO_LIB ERR_LIB_BIO 440#define ERR_R_PKCS7_LIB ERR_LIB_PKCS7 441#define ERR_R_PKCS8_LIB ERR_LIB_PKCS8 442#define ERR_R_X509V3_LIB ERR_LIB_X509V3 443#define ERR_R_RAND_LIB ERR_LIB_RAND 444#define ERR_R_DSO_LIB ERR_LIB_DSO 445#define ERR_R_ENGINE_LIB ERR_LIB_ENGINE 446#define ERR_R_OCSP_LIB ERR_LIB_OCSP 447#define ERR_R_UI_LIB ERR_LIB_UI 448#define ERR_R_COMP_LIB ERR_LIB_COMP 449#define ERR_R_ECDSA_LIB ERR_LIB_ECDSA 450#define ERR_R_ECDH_LIB ERR_LIB_ECDH 451#define ERR_R_STORE_LIB ERR_LIB_STORE 452#define ERR_R_FIPS_LIB ERR_LIB_FIPS 453#define ERR_R_CMS_LIB ERR_LIB_CMS 454#define ERR_R_TS_LIB ERR_LIB_TS 455#define ERR_R_HMAC_LIB ERR_LIB_HMAC 456#define ERR_R_JPAKE_LIB ERR_LIB_JPAKE 457#define ERR_R_USER_LIB ERR_LIB_USER 458#define ERR_R_DIGEST_LIB ERR_LIB_DIGEST 459#define ERR_R_CIPHER_LIB ERR_LIB_CIPHER 460#define ERR_R_HKDF_LIB ERR_LIB_HKDF 461 462/* Global reasons. */ 463#define ERR_R_FATAL 64 464#define ERR_R_MALLOC_FAILURE (1 | ERR_R_FATAL) 465#define ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED (2 | ERR_R_FATAL) 466#define ERR_R_PASSED_NULL_PARAMETER (3 | ERR_R_FATAL) 467#define ERR_R_INTERNAL_ERROR (4 | ERR_R_FATAL) 468#define ERR_R_OVERFLOW (5 | ERR_R_FATAL) 469 470#define ERR_PACK(lib, reason) \ 471 (((((uint32_t)(lib)) & 0xff) << 24) | ((((uint32_t)(reason)) & 0xfff))) 472 473#define ERR_GET_LIB(packed_error) ((int)(((packed_error) >> 24) & 0xff)) 474#define ERR_GET_FUNC(packed_error) 0 475#define ERR_GET_REASON(packed_error) ((int)((packed_error) & 0xfff)) 476 477/* OPENSSL_DECLARE_ERROR_REASON is used by util/make_errors.h (which generates 478 * the error defines) to recognise that an additional reason value is needed. 479 * This is needed when the reason value is used outside of an 480 * |OPENSSL_PUT_ERROR| macro. The resulting define will be 481 * ${lib}_R_${reason}. */ 482#define OPENSSL_DECLARE_ERROR_REASON(lib, reason) 483 484 485#if defined(__cplusplus) 486} /* extern C */ 487#endif 488 489#endif /* OPENSSL_HEADER_ERR_H */ 490