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