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