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