crypto/err/err.c

   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  */
 110
 111 #include <stdio.h>
 112 #include <stdarg.h>
 113 #include <string.h>
 114 #include <internal/cryptlib_int.h>
 115 #include <internal/threads.h>
 116 #include <openssl/lhash.h>
 117 #include <openssl/crypto.h>
 118 #include <openssl/buffer.h>
 119 #include <openssl/bio.h>
 120 #include "internal/err.h"
 121 #include <openssl/opensslconf.h>
 122
 123 static void err_load_strings(int lib, ERR_STRING_DATA *str);
 124
 125 static void ERR_STATE_free(ERR_STATE *s);
 126 #ifndef OPENSSL_NO_ERR
 127 static ERR_STRING_DATA ERR_str_libraries[] = {
 128     {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
 129     {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
 130     {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
 131     {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
 132     {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
 133     {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
 134     {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
 135     {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
 136     {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
 137     {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
 138     {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
 139     {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
 140     {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
 141     {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
 142     {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
 143     {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
 144     {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
 145     {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
 146     {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
 147     {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
 148     {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
 149     {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
 150     {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
 151     {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
 152     {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
 153     {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
 154     {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
 155     {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
 156     {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
 157     {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
 158     {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
 159     {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
 160     {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
 161     {0, NULL},
 162 };
 163
 164 static ERR_STRING_DATA ERR_str_functs[] = {
 165     {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
 166     {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
 167     {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
 168     {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
 169     {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
 170     {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
 171     {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
 172     {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
 173 # ifdef OPENSSL_SYS_WINDOWS
 174     {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
 175 # endif
 176     {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
 177     {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
 178     {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
 179     {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
 180     {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
 181     {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
 182     {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
 183     {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
 184     {0, NULL},
 185 };
 186
 187 static ERR_STRING_DATA ERR_str_reasons[] = {
 188     {ERR_R_SYS_LIB, "system lib"},
 189     {ERR_R_BN_LIB, "BN lib"},
 190     {ERR_R_RSA_LIB, "RSA lib"},
 191     {ERR_R_DH_LIB, "DH lib"},
 192     {ERR_R_EVP_LIB, "EVP lib"},
 193     {ERR_R_BUF_LIB, "BUF lib"},
 194     {ERR_R_OBJ_LIB, "OBJ lib"},
 195     {ERR_R_PEM_LIB, "PEM lib"},
 196     {ERR_R_DSA_LIB, "DSA lib"},
 197     {ERR_R_X509_LIB, "X509 lib"},
 198     {ERR_R_ASN1_LIB, "ASN1 lib"},
 199     {ERR_R_CONF_LIB, "CONF lib"},
 200     {ERR_R_CRYPTO_LIB, "CRYPTO lib"},
 201     {ERR_R_EC_LIB, "EC lib"},
 202     {ERR_R_SSL_LIB, "SSL lib"},
 203     {ERR_R_BIO_LIB, "BIO lib"},
 204     {ERR_R_PKCS7_LIB, "PKCS7 lib"},
 205     {ERR_R_X509V3_LIB, "X509V3 lib"},
 206     {ERR_R_PKCS12_LIB, "PKCS12 lib"},
 207     {ERR_R_RAND_LIB, "RAND lib"},
 208     {ERR_R_DSO_LIB, "DSO lib"},
 209     {ERR_R_ENGINE_LIB, "ENGINE lib"},
 210     {ERR_R_OCSP_LIB, "OCSP lib"},
 211     {ERR_R_TS_LIB, "TS lib"},
 212     {ERR_R_ECDSA_LIB, "ECDSA lib"},
 213
 214     {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
 215     {ERR_R_BAD_ASN1_OBJECT_HEADER, "bad asn1 object header"},
 216     {ERR_R_BAD_GET_ASN1_OBJECT_CALL, "bad get asn1 object call"},
 217     {ERR_R_EXPECTING_AN_ASN1_SEQUENCE, "expecting an asn1 sequence"},
 218     {ERR_R_ASN1_LENGTH_MISMATCH, "asn1 length mismatch"},
 219     {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
 220
 221     {ERR_R_FATAL, "fatal"},
 222     {ERR_R_MALLOC_FAILURE, "malloc failure"},
 223     {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
 224      "called a function you should not call"},
 225     {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
 226     {ERR_R_INTERNAL_ERROR, "internal error"},
 227     {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
 228     {ERR_R_INIT_FAIL, "init fail"},
 229
 230     {0, NULL},
 231 };
 232 #endif
 233
 234 static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
 235 static CRYPTO_THREAD_LOCAL err_thread_local;
 236
 237 static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
 238 static CRYPTO_RWLOCK *err_string_lock;
 239
 240 /* Predeclarations of the "err_defaults" functions */
 241 static LHASH_OF(ERR_STRING_DATA) *get_hash(int create, int lockit);
 242 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
 243
 244 /*
 245  * The internal state
 246  */
 247
 248 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
 249 static int int_err_library_number = ERR_LIB_USER;
 250
 251 static unsigned long get_error_values(int inc, int top, const char **file,
 252                                       int *line, const char **data,
 253                                       int *flags);
 254
 255 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
 256 {
 257     unsigned long ret, l;
 258
 259     l = a->error;
 260     ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
 261     return (ret ^ ret % 19 * 13);
 262 }
 263
 264 static int err_string_data_cmp(const ERR_STRING_DATA *a,
 265                                const ERR_STRING_DATA *b)
 266 {
 267     return (int)(a->error - b->error);
 268 }
 269
 270 static LHASH_OF(ERR_STRING_DATA) *get_hash(int create, int lockit)
 271 {
 272     LHASH_OF(ERR_STRING_DATA) *ret = NULL;
 273
 274     if (lockit)
 275         CRYPTO_THREAD_write_lock(err_string_lock);
 276     if (!int_error_hash && create) {
 277         int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
 278                                                 err_string_data_cmp);
 279     }
 280     if (int_error_hash != NULL)
 281         ret = int_error_hash;
 282     if (lockit)
 283         CRYPTO_THREAD_unlock(err_string_lock);
 284
 285     return ret;
 286 }
 287
 288 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
 289 {
 290     ERR_STRING_DATA *p = NULL;
 291     LHASH_OF(ERR_STRING_DATA) *hash;
 292
 293     CRYPTO_THREAD_read_lock(err_string_lock);
 294     hash = get_hash(0, 0);
 295     if (hash)
 296         p = lh_ERR_STRING_DATA_retrieve(hash, d);
 297     CRYPTO_THREAD_unlock(err_string_lock);
 298
 299     return p;
 300 }
 301
 302 #ifndef OPENSSL_NO_ERR
 303 # define NUM_SYS_STR_REASONS 127
 304 # define LEN_SYS_STR_REASON 32
 305
 306 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 307 /*
 308  * SYS_str_reasons is filled with copies of strerror() results at
 309  * initialization. 'errno' values up to 127 should cover all usual errors,
 310  * others will be displayed numerically by ERR_error_string. It is crucial
 311  * that we have something for each reason code that occurs in
 312  * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
 313  * which always gets an errno value and never one of those 'standard' reason
 314  * codes.
 315  */
 316
 317 static void build_SYS_str_reasons(void)
 318 {
 319     /* OPENSSL_malloc cannot be used here, use static storage instead */
 320     static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 321     static int init = 1;
 322     int i;
 323
 324     CRYPTO_THREAD_write_lock(err_string_lock);
 325     if (!init) {
 326         CRYPTO_THREAD_unlock(err_string_lock);
 327         return;
 328     }
 329
 330     for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
 331         ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 332
 333         str->error = (unsigned long)i;
 334         if (str->string == NULL) {
 335             char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 336             char *src = strerror(i);
 337             if (src != NULL) {
 338                 strncpy(*dest, src, sizeof(*dest));
 339                 (*dest)[sizeof(*dest) - 1] = '\0';
 340                 str->string = *dest;
 341             }
 342         }
 343         if (str->string == NULL)
 344             str->string = "unknown";
 345     }
 346
 347     /*
 348      * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
 349      * required by ERR_load_strings.
 350      */
 351
 352     init = 0;
 353
 354     CRYPTO_THREAD_unlock(err_string_lock);
 355 }
 356 #endif
 357
 358 #define err_clear_data(p,i) \
 359         do { \
 360         if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 361                 {  \
 362                 OPENSSL_free((p)->err_data[i]); \
 363                 (p)->err_data[i]=NULL; \
 364                 } \
 365         (p)->err_data_flags[i]=0; \
 366         } while(0)
 367
 368 #define err_clear(p,i) \
 369         do { \
 370         (p)->err_flags[i]=0; \
 371         (p)->err_buffer[i]=0; \
 372         err_clear_data(p,i); \
 373         (p)->err_file[i]=NULL; \
 374         (p)->err_line[i]= -1; \
 375         } while(0)
 376
 377 static void ERR_STATE_free(ERR_STATE *s)
 378 {
 379     int i;
 380
 381     if (s == NULL)
 382         return;
 383
 384     for (i = 0; i < ERR_NUM_ERRORS; i++) {
 385         err_clear_data(s, i);
 386     }
 387     OPENSSL_free(s);
 388 }
 389
 390 static void do_err_strings_init(void)
 391 {
 392     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
 393     err_string_lock = CRYPTO_THREAD_lock_new();
 394     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
 395 }
 396
 397 void ERR_load_ERR_strings(void)
 398 {
 399 #ifndef OPENSSL_NO_ERR
 400     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 401
 402     err_load_strings(0, ERR_str_libraries);
 403     err_load_strings(0, ERR_str_reasons);
 404     err_load_strings(ERR_LIB_SYS, ERR_str_functs);
 405     build_SYS_str_reasons();
 406     err_load_strings(ERR_LIB_SYS, SYS_str_reasons);
 407 #endif
 408 }
 409
 410 static void err_load_strings(int lib, ERR_STRING_DATA *str)
 411 {
 412     LHASH_OF(ERR_STRING_DATA) *hash;
 413
 414     CRYPTO_THREAD_write_lock(err_string_lock);
 415     hash = get_hash(1, 0);
 416     if (hash) {
 417         for (; str->error; str++) {
 418             if (lib)
 419                 str->error |= ERR_PACK(lib, 0, 0);
 420             (void)lh_ERR_STRING_DATA_insert(hash, str);
 421         }
 422     }
 423     CRYPTO_THREAD_unlock(err_string_lock);
 424 }
 425
 426 void ERR_load_strings(int lib, ERR_STRING_DATA *str)
 427 {
 428     ERR_load_ERR_strings();
 429     err_load_strings(lib, str);
 430 }
 431
 432 void ERR_unload_strings(int lib, ERR_STRING_DATA *str)
 433 {
 434     LHASH_OF(ERR_STRING_DATA) *hash;
 435
 436     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 437
 438     CRYPTO_THREAD_write_lock(err_string_lock);
 439     hash = get_hash(0, 0);
 440     if (hash) {
 441         for (; str->error; str++) {
 442             if (lib)
 443                 str->error |= ERR_PACK(lib, 0, 0);
 444             (void)lh_ERR_STRING_DATA_delete(hash, str);
 445         }
 446     }
 447     CRYPTO_THREAD_unlock(err_string_lock);
 448 }
 449
 450 void err_free_strings_int(void)
 451 {
 452     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 453
 454     CRYPTO_THREAD_write_lock(err_string_lock);
 455     lh_ERR_STRING_DATA_free(int_error_hash);
 456     int_error_hash = NULL;
 457     CRYPTO_THREAD_unlock(err_string_lock);
 458 }
 459
 460 /********************************************************/
 461
 462 void ERR_put_error(int lib, int func, int reason, const char *file, int line)
 463 {
 464     ERR_STATE *es;
 465
 466 #ifdef _OSD_POSIX
 467     /*
 468      * In the BS2000-OSD POSIX subsystem, the compiler generates path names
 469      * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
 470      * something sensible. @@@ We shouldn't modify a const string, though.
 471      */
 472     if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
 473         char *end;
 474
 475         /* Skip the "*POSIX(" prefix */
 476         file += sizeof("*POSIX(") - 1;
 477         end = &file[strlen(file) - 1];
 478         if (*end == ')')
 479             *end = '\0';
 480         /* Optional: use the basename of the path only. */
 481         if ((end = strrchr(file, '/')) != NULL)
 482             file = &end[1];
 483     }
 484 #endif
 485     es = ERR_get_state();
 486
 487     es->top = (es->top + 1) % ERR_NUM_ERRORS;
 488     if (es->top == es->bottom)
 489         es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
 490     es->err_flags[es->top] = 0;
 491     es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
 492     es->err_file[es->top] = file;
 493     es->err_line[es->top] = line;
 494     err_clear_data(es, es->top);
 495 }
 496
 497 void ERR_clear_error(void)
 498 {
 499     int i;
 500     ERR_STATE *es;
 501
 502     es = ERR_get_state();
 503
 504     for (i = 0; i < ERR_NUM_ERRORS; i++) {
 505         err_clear(es, i);
 506     }
 507     es->top = es->bottom = 0;
 508 }
 509
 510 unsigned long ERR_get_error(void)
 511 {
 512     return (get_error_values(1, 0, NULL, NULL, NULL, NULL));
 513 }
 514
 515 unsigned long ERR_get_error_line(const char **file, int *line)
 516 {
 517     return (get_error_values(1, 0, file, line, NULL, NULL));
 518 }
 519
 520 unsigned long ERR_get_error_line_data(const char **file, int *line,
 521                                       const char **data, int *flags)
 522 {
 523     return (get_error_values(1, 0, file, line, data, flags));
 524 }
 525
 526 unsigned long ERR_peek_error(void)
 527 {
 528     return (get_error_values(0, 0, NULL, NULL, NULL, NULL));
 529 }
 530
 531 unsigned long ERR_peek_error_line(const char **file, int *line)
 532 {
 533     return (get_error_values(0, 0, file, line, NULL, NULL));
 534 }
 535
 536 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 537                                        const char **data, int *flags)
 538 {
 539     return (get_error_values(0, 0, file, line, data, flags));
 540 }
 541
 542 unsigned long ERR_peek_last_error(void)
 543 {
 544     return (get_error_values(0, 1, NULL, NULL, NULL, NULL));
 545 }
 546
 547 unsigned long ERR_peek_last_error_line(const char **file, int *line)
 548 {
 549     return (get_error_values(0, 1, file, line, NULL, NULL));
 550 }
 551
 552 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
 553                                             const char **data, int *flags)
 554 {
 555     return (get_error_values(0, 1, file, line, data, flags));
 556 }
 557
 558 static unsigned long get_error_values(int inc, int top, const char **file,
 559                                       int *line, const char **data,
 560                                       int *flags)
 561 {
 562     int i = 0;
 563     ERR_STATE *es;
 564     unsigned long ret;
 565
 566     es = ERR_get_state();
 567
 568     if (inc && top) {
 569         if (file)
 570             *file = "";
 571         if (line)
 572             *line = 0;
 573         if (data)
 574             *data = "";
 575         if (flags)
 576             *flags = 0;
 577
 578         return ERR_R_INTERNAL_ERROR;
 579     }
 580
 581     if (es->bottom == es->top)
 582         return 0;
 583     if (top)
 584         i = es->top;            /* last error */
 585     else
 586         i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
 587
 588     ret = es->err_buffer[i];
 589     if (inc) {
 590         es->bottom = i;
 591         es->err_buffer[i] = 0;
 592     }
 593
 594     if ((file != NULL) && (line != NULL)) {
 595         if (es->err_file[i] == NULL) {
 596             *file = "NA";
 597             if (line != NULL)
 598                 *line = 0;
 599         } else {
 600             *file = es->err_file[i];
 601             if (line != NULL)
 602                 *line = es->err_line[i];
 603         }
 604     }
 605
 606     if (data == NULL) {
 607         if (inc) {
 608             err_clear_data(es, i);
 609         }
 610     } else {
 611         if (es->err_data[i] == NULL) {
 612             *data = "";
 613             if (flags != NULL)
 614                 *flags = 0;
 615         } else {
 616             *data = es->err_data[i];
 617             if (flags != NULL)
 618                 *flags = es->err_data_flags[i];
 619         }
 620     }
 621     return ret;
 622 }
 623
 624 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
 625 {
 626     char lsbuf[64], fsbuf[64], rsbuf[64];
 627     const char *ls, *fs, *rs;
 628     unsigned long l, f, r;
 629
 630     l = ERR_GET_LIB(e);
 631     f = ERR_GET_FUNC(e);
 632     r = ERR_GET_REASON(e);
 633
 634     ls = ERR_lib_error_string(e);
 635     fs = ERR_func_error_string(e);
 636     rs = ERR_reason_error_string(e);
 637
 638     if (ls == NULL)
 639         BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
 640     if (fs == NULL)
 641         BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
 642     if (rs == NULL)
 643         BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
 644
 645     BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls ? ls : lsbuf,
 646                  fs ? fs : fsbuf, rs ? rs : rsbuf);
 647     if (strlen(buf) == len - 1) {
 648         /*
 649          * output may be truncated; make sure we always have 5
 650          * colon-separated fields, i.e. 4 colons ...
 651          */
 652 #define NUM_COLONS 4
 653         if (len > NUM_COLONS) { /* ... if possible */
 654             int i;
 655             char *s = buf;
 656
 657             for (i = 0; i < NUM_COLONS; i++) {
 658                 char *colon = strchr(s, ':');
 659                 if (colon == NULL || colon > &buf[len - 1] - NUM_COLONS + i) {
 660                     /*
 661                      * set colon no. i at last possible position (buf[len-1]
 662                      * is the terminating 0)
 663                      */
 664                     colon = &buf[len - 1] - NUM_COLONS + i;
 665                     *colon = ':';
 666                 }
 667                 s = colon + 1;
 668             }
 669         }
 670     }
 671 }
 672
 673 /*
 674  * ERR_error_string_n should be used instead for ret != NULL as
 675  * ERR_error_string cannot know how large the buffer is
 676  */
 677 char *ERR_error_string(unsigned long e, char *ret)
 678 {
 679     static char buf[256];
 680
 681     if (ret == NULL)
 682         ret = buf;
 683     ERR_error_string_n(e, ret, 256);
 684
 685     return ret;
 686 }
 687
 688 LHASH_OF(ERR_STRING_DATA) *ERR_get_string_table(void)
 689 {
 690     return get_hash(0, 1);
 691 }
 692
 693 const char *ERR_lib_error_string(unsigned long e)
 694 {
 695     ERR_STRING_DATA d, *p;
 696     unsigned long l;
 697
 698     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 699
 700     l = ERR_GET_LIB(e);
 701     d.error = ERR_PACK(l, 0, 0);
 702     p = int_err_get_item(&d);
 703     return ((p == NULL) ? NULL : p->string);
 704 }
 705
 706 const char *ERR_func_error_string(unsigned long e)
 707 {
 708     ERR_STRING_DATA d, *p;
 709     unsigned long l, f;
 710
 711     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 712
 713     l = ERR_GET_LIB(e);
 714     f = ERR_GET_FUNC(e);
 715     d.error = ERR_PACK(l, f, 0);
 716     p = int_err_get_item(&d);
 717     return ((p == NULL) ? NULL : p->string);
 718 }
 719
 720 const char *ERR_reason_error_string(unsigned long e)
 721 {
 722     ERR_STRING_DATA d, *p = NULL;
 723     unsigned long l, r;
 724
 725     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 726
 727     l = ERR_GET_LIB(e);
 728     r = ERR_GET_REASON(e);
 729     d.error = ERR_PACK(l, 0, r);
 730     p = int_err_get_item(&d);
 731     if (!p) {
 732         d.error = ERR_PACK(0, 0, r);
 733         p = int_err_get_item(&d);
 734     }
 735     return ((p == NULL) ? NULL : p->string);
 736 }
 737
 738 void ERR_remove_thread_state(void)
 739 {
 740     ERR_STATE *state = ERR_get_state();
 741     if (state == NULL)
 742         return;
 743
 744     CRYPTO_THREAD_set_local(&err_thread_local, NULL);
 745     ERR_STATE_free(state);
 746 }
 747
 748 #if OPENSSL_API_COMPAT < 0x10000000L
 749 void ERR_remove_state(unsigned long pid)
 750 {
 751     ERR_remove_thread_state();
 752 }
 753 #endif
 754
 755 static void err_do_init(void)
 756 {
 757     CRYPTO_THREAD_init_local(&err_thread_local, NULL);
 758 }
 759
 760 ERR_STATE *ERR_get_state(void)
 761 {
 762     ERR_STATE *state = NULL;
 763
 764     CRYPTO_THREAD_run_once(&err_init, err_do_init);
 765
 766     state = CRYPTO_THREAD_get_local(&err_thread_local);
 767
 768     if (state == NULL) {
 769         state = OPENSSL_zalloc(sizeof(*state));
 770         if (state == NULL)
 771             return NULL;
 772
 773         if (!CRYPTO_THREAD_set_local(&err_thread_local, state)) {
 774             ERR_STATE_free(state);
 775             return NULL;
 776         }
 777
 778         /* Ignore failures from these */
 779         OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 780         ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE);
 781     }
 782
 783     return state;
 784 }
 785
 786 int ERR_get_next_error_library(void)
 787 {
 788     int ret;
 789
 790     CRYPTO_THREAD_run_once(&err_string_init, do_err_strings_init);
 791
 792     CRYPTO_THREAD_write_lock(err_string_lock);
 793     ret = int_err_library_number++;
 794     CRYPTO_THREAD_unlock(err_string_lock);
 795     return ret;
 796 }
 797
 798 void ERR_set_error_data(char *data, int flags)
 799 {
 800     ERR_STATE *es;
 801     int i;
 802
 803     es = ERR_get_state();
 804
 805     i = es->top;
 806     if (i == 0)
 807         i = ERR_NUM_ERRORS - 1;
 808
 809     err_clear_data(es, i);
 810     es->err_data[i] = data;
 811     es->err_data_flags[i] = flags;
 812 }
 813
 814 void ERR_add_error_data(int num, ...)
 815 {
 816     va_list args;
 817     va_start(args, num);
 818     ERR_add_error_vdata(num, args);
 819     va_end(args);
 820 }
 821
 822 void ERR_add_error_vdata(int num, va_list args)
 823 {
 824     int i, n, s;
 825     char *str, *p, *a;
 826
 827     s = 80;
 828     str = OPENSSL_malloc(s + 1);
 829     if (str == NULL)
 830         return;
 831     str[0] = '\0';
 832
 833     n = 0;
 834     for (i = 0; i < num; i++) {
 835         a = va_arg(args, char *);
 836         /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 837         if (a != NULL) {
 838             n += strlen(a);
 839             if (n > s) {
 840                 s = n + 20;
 841                 p = OPENSSL_realloc(str, s + 1);
 842                 if (p == NULL) {
 843                     OPENSSL_free(str);
 844                     return;
 845                 }
 846                 str = p;
 847             }
 848             OPENSSL_strlcat(str, a, (size_t)s + 1);
 849         }
 850     }
 851     ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
 852 }
 853
 854 int ERR_set_mark(void)
 855 {
 856     ERR_STATE *es;
 857
 858     es = ERR_get_state();
 859
 860     if (es->bottom == es->top)
 861         return 0;
 862     es->err_flags[es->top] |= ERR_FLAG_MARK;
 863     return 1;
 864 }
 865
 866 int ERR_pop_to_mark(void)
 867 {
 868     ERR_STATE *es;
 869
 870     es = ERR_get_state();
 871
 872     while (es->bottom != es->top
 873            && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
 874         err_clear(es, es->top);
 875         es->top -= 1;
 876         if (es->top == -1)
 877             es->top = ERR_NUM_ERRORS - 1;
 878     }
 879
 880     if (es->bottom == es->top)
 881         return 0;
 882     es->err_flags[es->top] &= ~ERR_FLAG_MARK;
 883     return 1;
 884 }