crypto/err/err.c

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdarg.h>
  12 #include <string.h>
  13 #include <internal/cryptlib_int.h>
  14 #include <internal/err.h>
  15 #include <internal/err_int.h>
  16 #include <openssl/lhash.h>
  17 #include <openssl/err.h>
  18 #include <openssl/crypto.h>
  19 #include <openssl/buffer.h>
  20 #include <openssl/bio.h>
  21 #include <openssl/opensslconf.h>
  22 #include <internal/thread_once.h>
  23
  24 static int err_load_strings(const ERR_STRING_DATA *str);
  25
  26 static void ERR_STATE_free(ERR_STATE *s);
  27 #ifndef OPENSSL_NO_ERR
  28 static ERR_STRING_DATA ERR_str_libraries[] = {
  29     {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
  30     {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
  31     {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
  32     {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
  33     {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
  34     {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
  35     {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
  36     {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
  37     {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
  38     {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
  39     {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
  40     {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
  41     {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
  42     {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
  43     {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
  44     {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
  45     {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
  46     {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
  47     {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
  48     {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
  49     {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
  50     {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
  51     {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
  52     {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
  53     {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
  54     {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
  55     {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
  56     {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
  57     {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
  58     {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
  59     {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
  60     {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
  61     {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
  62     {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
  63     {0, NULL},
  64 };
  65
  66 static ERR_STRING_DATA ERR_str_functs[] = {
  67     {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
  68     {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
  69     {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
  70     {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
  71     {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
  72     {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
  73     {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
  74     {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
  75 # ifdef OPENSSL_SYS_WINDOWS
  76     {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
  77 # endif
  78     {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
  79     {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
  80     {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
  81     {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
  82     {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
  83     {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
  84     {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
  85     {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
  86     {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
  87     {0, NULL},
  88 };
  89
  90 static ERR_STRING_DATA ERR_str_reasons[] = {
  91     {ERR_R_SYS_LIB, "system lib"},
  92     {ERR_R_BN_LIB, "BN lib"},
  93     {ERR_R_RSA_LIB, "RSA lib"},
  94     {ERR_R_DH_LIB, "DH lib"},
  95     {ERR_R_EVP_LIB, "EVP lib"},
  96     {ERR_R_BUF_LIB, "BUF lib"},
  97     {ERR_R_OBJ_LIB, "OBJ lib"},
  98     {ERR_R_PEM_LIB, "PEM lib"},
  99     {ERR_R_DSA_LIB, "DSA lib"},
 100     {ERR_R_X509_LIB, "X509 lib"},
 101     {ERR_R_ASN1_LIB, "ASN1 lib"},
 102     {ERR_R_EC_LIB, "EC lib"},
 103     {ERR_R_BIO_LIB, "BIO lib"},
 104     {ERR_R_PKCS7_LIB, "PKCS7 lib"},
 105     {ERR_R_X509V3_LIB, "X509V3 lib"},
 106     {ERR_R_ENGINE_LIB, "ENGINE lib"},
 107     {ERR_R_ECDSA_LIB, "ECDSA lib"},
 108
 109     {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
 110     {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
 111
 112     {ERR_R_FATAL, "fatal"},
 113     {ERR_R_MALLOC_FAILURE, "malloc failure"},
 114     {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
 115      "called a function you should not call"},
 116     {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
 117     {ERR_R_INTERNAL_ERROR, "internal error"},
 118     {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
 119     {ERR_R_INIT_FAIL, "init fail"},
 120
 121     {0, NULL},
 122 };
 123 #endif
 124
 125 static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
 126 static int set_err_thread_local;
 127 static CRYPTO_THREAD_LOCAL err_thread_local;
 128
 129 static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
 130 static CRYPTO_RWLOCK *err_string_lock;
 131
 132 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
 133
 134 /*
 135  * The internal state
 136  */
 137
 138 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
 139 static int int_err_library_number = ERR_LIB_USER;
 140
 141 static unsigned long get_error_values(int inc, int top, const char **file,
 142                                       int *line, const char **data,
 143                                       int *flags);
 144
 145 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
 146 {
 147     unsigned long ret, l;
 148
 149     l = a->error;
 150     ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
 151     return (ret ^ ret % 19 * 13);
 152 }
 153
 154 static int err_string_data_cmp(const ERR_STRING_DATA *a,
 155                                const ERR_STRING_DATA *b)
 156 {
 157     return (int)(a->error - b->error);
 158 }
 159
 160 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
 161 {
 162     ERR_STRING_DATA *p = NULL;
 163
 164     CRYPTO_THREAD_read_lock(err_string_lock);
 165     p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
 166     CRYPTO_THREAD_unlock(err_string_lock);
 167
 168     return p;
 169 }
 170
 171 #ifndef OPENSSL_NO_ERR
 172 # define NUM_SYS_STR_REASONS 127
 173 # define LEN_SYS_STR_REASON 32
 174
 175 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
 176 /*
 177  * SYS_str_reasons is filled with copies of strerror() results at
 178  * initialization. 'errno' values up to 127 should cover all usual errors,
 179  * others will be displayed numerically by ERR_error_string. It is crucial
 180  * that we have something for each reason code that occurs in
 181  * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
 182  * which always gets an errno value and never one of those 'standard' reason
 183  * codes.
 184  */
 185
 186 static void build_SYS_str_reasons(void)
 187 {
 188     /* OPENSSL_malloc cannot be used here, use static storage instead */
 189     static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
 190     static int init = 1;
 191     int i;
 192
 193     CRYPTO_THREAD_write_lock(err_string_lock);
 194     if (!init) {
 195         CRYPTO_THREAD_unlock(err_string_lock);
 196         return;
 197     }
 198
 199     for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
 200         ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
 201
 202         str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
 203         if (str->string == NULL) {
 204             char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
 205             if (openssl_strerror_r(i, *dest, sizeof(*dest)))
 206                 str->string = *dest;
 207         }
 208         if (str->string == NULL)
 209             str->string = "unknown";
 210     }
 211
 212     /*
 213      * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
 214      * required by ERR_load_strings.
 215      */
 216
 217     init = 0;
 218
 219     CRYPTO_THREAD_unlock(err_string_lock);
 220     err_load_strings(SYS_str_reasons);
 221 }
 222 #endif
 223
 224 #define err_clear_data(p,i) \
 225         do { \
 226         if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) \
 227                 {  \
 228                 OPENSSL_free((p)->err_data[i]); \
 229                 (p)->err_data[i]=NULL; \
 230                 } \
 231         (p)->err_data_flags[i]=0; \
 232         } while(0)
 233
 234 #define err_clear(p,i) \
 235         do { \
 236         (p)->err_flags[i]=0; \
 237         (p)->err_buffer[i]=0; \
 238         err_clear_data(p,i); \
 239         (p)->err_file[i]=NULL; \
 240         (p)->err_line[i]= -1; \
 241         } while(0)
 242
 243 static void ERR_STATE_free(ERR_STATE *s)
 244 {
 245     int i;
 246
 247     if (s == NULL)
 248         return;
 249
 250     for (i = 0; i < ERR_NUM_ERRORS; i++) {
 251         err_clear_data(s, i);
 252     }
 253     OPENSSL_free(s);
 254 }
 255
 256 DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
 257 {
 258     OPENSSL_init_crypto(0, NULL);
 259     err_string_lock = CRYPTO_THREAD_lock_new();
 260     int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
 261                                             err_string_data_cmp);
 262     return err_string_lock != NULL && int_error_hash != NULL;
 263 }
 264
 265 void err_cleanup(void)
 266 {
 267     if (set_err_thread_local != 0)
 268         CRYPTO_THREAD_cleanup_local(&err_thread_local);
 269     CRYPTO_THREAD_lock_free(err_string_lock);
 270     err_string_lock = NULL;
 271     lh_ERR_STRING_DATA_free(int_error_hash);
 272     int_error_hash = NULL;
 273 }
 274
 275 /*
 276  * Legacy; pack in the library.
 277  */
 278 static void err_patch(int lib, ERR_STRING_DATA *str)
 279 {
 280     unsigned long plib = ERR_PACK(lib, 0, 0);
 281
 282     for (; str->error != 0; str++)
 283         str->error |= plib;
 284 }
 285
 286 /*
 287  * Hash in |str| error strings. Assumes the URN_ONCE was done.
 288  */
 289 static int err_load_strings(const ERR_STRING_DATA *str)
 290 {
 291     CRYPTO_THREAD_write_lock(err_string_lock);
 292     for (; str->error; str++)
 293         (void)lh_ERR_STRING_DATA_insert(int_error_hash,
 294                                        (ERR_STRING_DATA *)str);
 295     CRYPTO_THREAD_unlock(err_string_lock);
 296     return 1;
 297 }
 298
 299 int ERR_load_ERR_strings(void)
 300 {
 301 #ifndef OPENSSL_NO_ERR
 302     if (!RUN_ONCE(&err_string_init, do_err_strings_init))
 303         return 0;
 304
 305     err_load_strings(ERR_str_libraries);
 306     err_load_strings(ERR_str_reasons);
 307     err_patch(ERR_LIB_SYS, ERR_str_functs);
 308     err_load_strings(ERR_str_functs);
 309     build_SYS_str_reasons();
 310 #endif
 311     return 1;
 312 }
 313
 314 int ERR_load_strings(int lib, ERR_STRING_DATA *str)
 315 {
 316     if (ERR_load_ERR_strings() == 0)
 317         return 0;
 318
 319     err_patch(lib, str);
 320     err_load_strings(str);
 321     return 1;
 322 }
 323
 324 int ERR_load_strings_const(const ERR_STRING_DATA *str)
 325 {
 326     if (ERR_load_ERR_strings() == 0)
 327         return 0;
 328     err_load_strings(str);
 329     return 1;
 330 }
 331
 332 int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
 333 {
 334     if (!RUN_ONCE(&err_string_init, do_err_strings_init))
 335         return 0;
 336
 337     CRYPTO_THREAD_write_lock(err_string_lock);
 338     /*
 339      * We don't need to ERR_PACK the lib, since that was done (to
 340      * the table) when it was loaded.
 341      */
 342     for (; str->error; str++)
 343         (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
 344     CRYPTO_THREAD_unlock(err_string_lock);
 345
 346     return 1;
 347 }
 348
 349 void err_free_strings_int(void)
 350 {
 351     if (!RUN_ONCE(&err_string_init, do_err_strings_init))
 352         return;
 353 }
 354
 355 /********************************************************/
 356
 357 void ERR_put_error(int lib, int func, int reason, const char *file, int line)
 358 {
 359     ERR_STATE *es;
 360
 361 #ifdef _OSD_POSIX
 362     /*
 363      * In the BS2000-OSD POSIX subsystem, the compiler generates path names
 364      * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
 365      * something sensible. @@@ We shouldn't modify a const string, though.
 366      */
 367     if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
 368         char *end;
 369
 370         /* Skip the "*POSIX(" prefix */
 371         file += sizeof("*POSIX(") - 1;
 372         end = &file[strlen(file) - 1];
 373         if (*end == ')')
 374             *end = '\0';
 375         /* Optional: use the basename of the path only. */
 376         if ((end = strrchr(file, '/')) != NULL)
 377             file = &end[1];
 378     }
 379 #endif
 380     es = ERR_get_state();
 381
 382     es->top = (es->top + 1) % ERR_NUM_ERRORS;
 383     if (es->top == es->bottom)
 384         es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
 385     es->err_flags[es->top] = 0;
 386     es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
 387     es->err_file[es->top] = file;
 388     es->err_line[es->top] = line;
 389     err_clear_data(es, es->top);
 390 }
 391
 392 void ERR_clear_error(void)
 393 {
 394     int i;
 395     ERR_STATE *es;
 396
 397     es = ERR_get_state();
 398
 399     for (i = 0; i < ERR_NUM_ERRORS; i++) {
 400         err_clear(es, i);
 401     }
 402     es->top = es->bottom = 0;
 403 }
 404
 405 unsigned long ERR_get_error(void)
 406 {
 407     return (get_error_values(1, 0, NULL, NULL, NULL, NULL));
 408 }
 409
 410 unsigned long ERR_get_error_line(const char **file, int *line)
 411 {
 412     return (get_error_values(1, 0, file, line, NULL, NULL));
 413 }
 414
 415 unsigned long ERR_get_error_line_data(const char **file, int *line,
 416                                       const char **data, int *flags)
 417 {
 418     return (get_error_values(1, 0, file, line, data, flags));
 419 }
 420
 421 unsigned long ERR_peek_error(void)
 422 {
 423     return (get_error_values(0, 0, NULL, NULL, NULL, NULL));
 424 }
 425
 426 unsigned long ERR_peek_error_line(const char **file, int *line)
 427 {
 428     return (get_error_values(0, 0, file, line, NULL, NULL));
 429 }
 430
 431 unsigned long ERR_peek_error_line_data(const char **file, int *line,
 432                                        const char **data, int *flags)
 433 {
 434     return (get_error_values(0, 0, file, line, data, flags));
 435 }
 436
 437 unsigned long ERR_peek_last_error(void)
 438 {
 439     return (get_error_values(0, 1, NULL, NULL, NULL, NULL));
 440 }
 441
 442 unsigned long ERR_peek_last_error_line(const char **file, int *line)
 443 {
 444     return (get_error_values(0, 1, file, line, NULL, NULL));
 445 }
 446
 447 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
 448                                             const char **data, int *flags)
 449 {
 450     return (get_error_values(0, 1, file, line, data, flags));
 451 }
 452
 453 static unsigned long get_error_values(int inc, int top, const char **file,
 454                                       int *line, const char **data,
 455                                       int *flags)
 456 {
 457     int i = 0;
 458     ERR_STATE *es;
 459     unsigned long ret;
 460
 461     es = ERR_get_state();
 462
 463     if (inc && top) {
 464         if (file)
 465             *file = "";
 466         if (line)
 467             *line = 0;
 468         if (data)
 469             *data = "";
 470         if (flags)
 471             *flags = 0;
 472
 473         return ERR_R_INTERNAL_ERROR;
 474     }
 475
 476     if (es->bottom == es->top)
 477         return 0;
 478     if (top)
 479         i = es->top;            /* last error */
 480     else
 481         i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
 482
 483     ret = es->err_buffer[i];
 484     if (inc) {
 485         es->bottom = i;
 486         es->err_buffer[i] = 0;
 487     }
 488
 489     if ((file != NULL) && (line != NULL)) {
 490         if (es->err_file[i] == NULL) {
 491             *file = "NA";
 492             if (line != NULL)
 493                 *line = 0;
 494         } else {
 495             *file = es->err_file[i];
 496             if (line != NULL)
 497                 *line = es->err_line[i];
 498         }
 499     }
 500
 501     if (data == NULL) {
 502         if (inc) {
 503             err_clear_data(es, i);
 504         }
 505     } else {
 506         if (es->err_data[i] == NULL) {
 507             *data = "";
 508             if (flags != NULL)
 509                 *flags = 0;
 510         } else {
 511             *data = es->err_data[i];
 512             if (flags != NULL)
 513                 *flags = es->err_data_flags[i];
 514         }
 515     }
 516     return ret;
 517 }
 518
 519 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
 520 {
 521     char lsbuf[64], fsbuf[64], rsbuf[64];
 522     const char *ls, *fs, *rs;
 523     unsigned long l, f, r;
 524
 525     if (len == 0)
 526         return;
 527
 528     l = ERR_GET_LIB(e);
 529     f = ERR_GET_FUNC(e);
 530     r = ERR_GET_REASON(e);
 531
 532     ls = ERR_lib_error_string(e);
 533     fs = ERR_func_error_string(e);
 534     rs = ERR_reason_error_string(e);
 535
 536     if (ls == NULL)
 537         BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
 538     if (fs == NULL)
 539         BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
 540     if (rs == NULL)
 541         BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
 542
 543     BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls ? ls : lsbuf,
 544                  fs ? fs : fsbuf, rs ? rs : rsbuf);
 545     if (strlen(buf) == len - 1) {
 546         /*
 547          * output may be truncated; make sure we always have 5
 548          * colon-separated fields, i.e. 4 colons ...
 549          */
 550 #define NUM_COLONS 4
 551         if (len > NUM_COLONS) { /* ... if possible */
 552             int i;
 553             char *s = buf;
 554
 555             for (i = 0; i < NUM_COLONS; i++) {
 556                 char *colon = strchr(s, ':');
 557                 if (colon == NULL || colon > &buf[len - 1] - NUM_COLONS + i) {
 558                     /*
 559                      * set colon no. i at last possible position (buf[len-1]
 560                      * is the terminating 0)
 561                      */
 562                     colon = &buf[len - 1] - NUM_COLONS + i;
 563                     *colon = ':';
 564                 }
 565                 s = colon + 1;
 566             }
 567         }
 568     }
 569 }
 570
 571 /*
 572  * ERR_error_string_n should be used instead for ret != NULL as
 573  * ERR_error_string cannot know how large the buffer is
 574  */
 575 char *ERR_error_string(unsigned long e, char *ret)
 576 {
 577     static char buf[256];
 578
 579     if (ret == NULL)
 580         ret = buf;
 581     ERR_error_string_n(e, ret, 256);
 582
 583     return ret;
 584 }
 585
 586 const char *ERR_lib_error_string(unsigned long e)
 587 {
 588     ERR_STRING_DATA d, *p;
 589     unsigned long l;
 590
 591     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 592         return NULL;
 593     }
 594
 595     l = ERR_GET_LIB(e);
 596     d.error = ERR_PACK(l, 0, 0);
 597     p = int_err_get_item(&d);
 598     return ((p == NULL) ? NULL : p->string);
 599 }
 600
 601 const char *ERR_func_error_string(unsigned long e)
 602 {
 603     ERR_STRING_DATA d, *p;
 604     unsigned long l, f;
 605
 606     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 607         return NULL;
 608     }
 609
 610     l = ERR_GET_LIB(e);
 611     f = ERR_GET_FUNC(e);
 612     d.error = ERR_PACK(l, f, 0);
 613     p = int_err_get_item(&d);
 614     return ((p == NULL) ? NULL : p->string);
 615 }
 616
 617 const char *ERR_reason_error_string(unsigned long e)
 618 {
 619     ERR_STRING_DATA d, *p = NULL;
 620     unsigned long l, r;
 621
 622     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 623         return NULL;
 624     }
 625
 626     l = ERR_GET_LIB(e);
 627     r = ERR_GET_REASON(e);
 628     d.error = ERR_PACK(l, 0, r);
 629     p = int_err_get_item(&d);
 630     if (!p) {
 631         d.error = ERR_PACK(0, 0, r);
 632         p = int_err_get_item(&d);
 633     }
 634     return ((p == NULL) ? NULL : p->string);
 635 }
 636
 637 void err_delete_thread_state(void)
 638 {
 639     ERR_STATE *state = ERR_get_state();
 640     if (state == NULL)
 641         return;
 642
 643     CRYPTO_THREAD_set_local(&err_thread_local, NULL);
 644     ERR_STATE_free(state);
 645 }
 646
 647 #if OPENSSL_API_COMPAT < 0x10100000L
 648 void ERR_remove_thread_state(void *dummy)
 649 {
 650 }
 651 #endif
 652
 653 #if OPENSSL_API_COMPAT < 0x10000000L
 654 void ERR_remove_state(unsigned long pid)
 655 {
 656 }
 657 #endif
 658
 659 DEFINE_RUN_ONCE_STATIC(err_do_init)
 660 {
 661     set_err_thread_local = 1;
 662     return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
 663 }
 664
 665 ERR_STATE *ERR_get_state(void)
 666 {
 667     ERR_STATE *state = NULL;
 668
 669     if (!RUN_ONCE(&err_init, err_do_init))
 670         return NULL;
 671
 672     state = CRYPTO_THREAD_get_local(&err_thread_local);
 673
 674     if (state == NULL) {
 675         state = OPENSSL_zalloc(sizeof(*state));
 676         if (state == NULL)
 677             return NULL;
 678
 679         if (!CRYPTO_THREAD_set_local(&err_thread_local, state)) {
 680             ERR_STATE_free(state);
 681             return NULL;
 682         }
 683
 684         /* Ignore failures from these */
 685         OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
 686         ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE);
 687     }
 688
 689     return state;
 690 }
 691
 692 int ERR_get_next_error_library(void)
 693 {
 694     int ret;
 695
 696     if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
 697         return 0;
 698     }
 699
 700     CRYPTO_THREAD_write_lock(err_string_lock);
 701     ret = int_err_library_number++;
 702     CRYPTO_THREAD_unlock(err_string_lock);
 703     return ret;
 704 }
 705
 706 void ERR_set_error_data(char *data, int flags)
 707 {
 708     ERR_STATE *es;
 709     int i;
 710
 711     es = ERR_get_state();
 712
 713     i = es->top;
 714     if (i == 0)
 715         i = ERR_NUM_ERRORS - 1;
 716
 717     err_clear_data(es, i);
 718     es->err_data[i] = data;
 719     es->err_data_flags[i] = flags;
 720 }
 721
 722 void ERR_add_error_data(int num, ...)
 723 {
 724     va_list args;
 725     va_start(args, num);
 726     ERR_add_error_vdata(num, args);
 727     va_end(args);
 728 }
 729
 730 void ERR_add_error_vdata(int num, va_list args)
 731 {
 732     int i, n, s;
 733     char *str, *p, *a;
 734
 735     s = 80;
 736     str = OPENSSL_malloc(s + 1);
 737     if (str == NULL)
 738         return;
 739     str[0] = '\0';
 740
 741     n = 0;
 742     for (i = 0; i < num; i++) {
 743         a = va_arg(args, char *);
 744         /* ignore NULLs, thanks to Bob Beck <beck@obtuse.com> */
 745         if (a != NULL) {
 746             n += strlen(a);
 747             if (n > s) {
 748                 s = n + 20;
 749                 p = OPENSSL_realloc(str, s + 1);
 750                 if (p == NULL) {
 751                     OPENSSL_free(str);
 752                     return;
 753                 }
 754                 str = p;
 755             }
 756             OPENSSL_strlcat(str, a, (size_t)s + 1);
 757         }
 758     }
 759     ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
 760 }
 761
 762 int ERR_set_mark(void)
 763 {
 764     ERR_STATE *es;
 765
 766     es = ERR_get_state();
 767
 768     if (es->bottom == es->top)
 769         return 0;
 770     es->err_flags[es->top] |= ERR_FLAG_MARK;
 771     return 1;
 772 }
 773
 774 int ERR_pop_to_mark(void)
 775 {
 776     ERR_STATE *es;
 777
 778     es = ERR_get_state();
 779
 780     while (es->bottom != es->top
 781            && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
 782         err_clear(es, es->top);
 783         es->top -= 1;
 784         if (es->top == -1)
 785             es->top = ERR_NUM_ERRORS - 1;
 786     }
 787
 788     if (es->bottom == es->top)
 789         return 0;
 790     es->err_flags[es->top] &= ~ERR_FLAG_MARK;
 791     return 1;
 792 }