text: /*
   * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <stdio.h>
  #include <stdarg.h>
  #include <string.h>
  #include "internal/cryptlib_int.h"
  #include "internal/err.h"
  #include "internal/err_int.h"
  #include <openssl/err.h>
  #include <openssl/crypto.h>
  #include <openssl/buffer.h>
  #include <openssl/bio.h>
  #include <openssl/opensslconf.h>
  #include "internal/thread_once.h"
  #include "internal/ctype.h"
  #include "internal/constant_time_locl.h"
  
  static int err_load_strings(const ERR_STRING_DATA *str);
  
  static void ERR_STATE_free(ERR_STATE *s);
  #ifndef OPENSSL_NO_ERR
  static ERR_STRING_DATA ERR_str_libraries[] = {
      {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
      {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
      {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
      {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
      {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
      {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
      {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
      {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
      {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
      {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
      {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
      {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
      {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
      {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
      {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
      {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
      {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
      {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
      {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
      {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
      {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
      {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
      {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
      {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
      {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
      {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
      {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
      {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
      {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
      {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
      {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
      {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
      {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
      {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
      {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},
      {ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"},
      {0, NULL},
  };
  
  static ERR_STRING_DATA ERR_str_functs[] = {
      {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
      {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
      {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
      {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
      {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
      {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
      {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
      {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
  # ifdef OPENSSL_SYS_WINDOWS
      {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
  # endif
      {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
      {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
      {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
      {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
      {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
      {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
      {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
      {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
      {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
      {ERR_PACK(0, SYS_F_OPEN, 0), "open"},
      {ERR_PACK(0, SYS_F_CLOSE, 0), "close"},
      {ERR_PACK(0, SYS_F_IOCTL, 0), "ioctl"},
      {ERR_PACK(0, SYS_F_STAT, 0), "stat"},
      {ERR_PACK(0, SYS_F_FCNTL, 0), "fcntl"},
      {ERR_PACK(0, SYS_F_FSTAT, 0), "fstat"},
      {0, NULL},
  };
  
  static ERR_STRING_DATA ERR_str_reasons[] = {
      {ERR_R_SYS_LIB, "system lib"},
      {ERR_R_BN_LIB, "BN lib"},
      {ERR_R_RSA_LIB, "RSA lib"},
      {ERR_R_DH_LIB, "DH lib"},
      {ERR_R_EVP_LIB, "EVP lib"},
      {ERR_R_BUF_LIB, "BUF lib"},
      {ERR_R_OBJ_LIB, "OBJ lib"},
      {ERR_R_PEM_LIB, "PEM lib"},
      {ERR_R_DSA_LIB, "DSA lib"},
      {ERR_R_X509_LIB, "X509 lib"},
      {ERR_R_ASN1_LIB, "ASN1 lib"},
      {ERR_R_EC_LIB, "EC lib"},
      {ERR_R_BIO_LIB, "BIO lib"},
      {ERR_R_PKCS7_LIB, "PKCS7 lib"},
      {ERR_R_X509V3_LIB, "X509V3 lib"},
      {ERR_R_ENGINE_LIB, "ENGINE lib"},
      {ERR_R_UI_LIB, "UI lib"},
      {ERR_R_OSSL_STORE_LIB, "STORE lib"},
      {ERR_R_ECDSA_LIB, "ECDSA lib"},
  
      {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
      {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
  
      {ERR_R_FATAL, "fatal"},
      {ERR_R_MALLOC_FAILURE, "malloc failure"},
      {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
       "called a function you should not call"},
      {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
      {ERR_R_INTERNAL_ERROR, "internal error"},
      {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
      {ERR_R_INIT_FAIL, "init fail"},
      {ERR_R_OPERATION_FAIL, "operation fail"},
  
      {0, NULL},
  };
  #endif
  
  static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
  static int set_err_thread_local;
  static CRYPTO_THREAD_LOCAL err_thread_local;
  
  static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
  static CRYPTO_RWLOCK *err_string_lock;
  
  static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
  
  /*
   * The internal state
   */
  
  static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
  static int int_err_library_number = ERR_LIB_USER;
  
  static unsigned long get_error_values(int inc, int top, const char **file,
                                        int *line, const char **data,
                                        int *flags);
  
  static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
  {
      unsigned long ret, l;
  
      l = a->error;
      ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
      return (ret ^ ret % 19 * 13);
  }
  
  static int err_string_data_cmp(const ERR_STRING_DATA *a,
                                 const ERR_STRING_DATA *b)
  {
      if (a->error == b->error)
          return 0;
      return a->error > b->error ? 1 : -1;
  }
  
  static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
  {
      ERR_STRING_DATA *p = NULL;
  
      CRYPTO_THREAD_read_lock(err_string_lock);
      p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
      CRYPTO_THREAD_unlock(err_string_lock);
  
      return p;
  }
  
  #ifndef OPENSSL_NO_ERR
  /* A measurement on Linux 2018-11-21 showed about 3.5kib */
  # define SPACE_SYS_STR_REASONS 4 * 1024
  # define NUM_SYS_STR_REASONS 127
  
  static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
  /*
   * SYS_str_reasons is filled with copies of strerror() results at
   * initialization. 'errno' values up to 127 should cover all usual errors,
   * others will be displayed numerically by ERR_error_string. It is crucial
   * that we have something for each reason code that occurs in
   * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
   * which always gets an errno value and never one of those 'standard' reason
   * codes.
   */
  
  static void build_SYS_str_reasons(void)
  {
      /* OPENSSL_malloc cannot be used here, use static storage instead */
      static char strerror_pool[SPACE_SYS_STR_REASONS];
      char *cur = strerror_pool;
      size_t cnt = 0;
      static int init = 1;
      int i;
  
      CRYPTO_THREAD_write_lock(err_string_lock);
      if (!init) {
          CRYPTO_THREAD_unlock(err_string_lock);
          return;
      }
  
      for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
          ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
  
          str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
          if (str->string == NULL) {
              if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) {
                  size_t l = strlen(cur);
  
                  str->string = cur;
                  cnt += l;
                  if (cnt > sizeof(strerror_pool))
                      cnt = sizeof(strerror_pool);
                  cur += l;
  
                  /*
                   * VMS has an unusual quirk of adding spaces at the end of
                   * some (most? all?) messages.  Lets trim them off.
                   */
                  while (ossl_isspace(cur[-1])) {
                      cur--;
                      cnt--;
                  }
                  *cur++ = '\0';
                  cnt++;
              }
          }
          if (str->string == NULL)
              str->string = "unknown";
      }
  
      /*
       * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
       * required by ERR_load_strings.
       */
  
      init = 0;
  
      CRYPTO_THREAD_unlock(err_string_lock);
      err_load_strings(SYS_str_reasons);
  }
  #endif
  
  #define err_clear_data(p, i) \
          do { \
              if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) {\
                  OPENSSL_free((p)->err_data[i]); \
                  (p)->err_data[i] = NULL; \
              } \
              (p)->err_data_flags[i] = 0; \
          } while (0)
  
  #define err_clear(p, i) \
          do { \
              err_clear_data(p, i); \
              (p)->err_flags[i] = 0; \
              (p)->err_buffer[i] = 0; \
              (p)->err_file[i] = NULL; \
              (p)->err_line[i] = -1; \
          } while (0)
  
  static void ERR_STATE_free(ERR_STATE *s)
  {
      int i;
  
      if (s == NULL)
          return;
      for (i = 0; i < ERR_NUM_ERRORS; i++) {
          err_clear_data(s, i);
      }
      OPENSSL_free(s);
  }
  
  DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
  {
      if (!OPENSSL_init_crypto(0, NULL))
          return 0;
      err_string_lock = CRYPTO_THREAD_lock_new();
      if (err_string_lock == NULL)
          return 0;
      int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
                                              err_string_data_cmp);
      if (int_error_hash == NULL) {
          CRYPTO_THREAD_lock_free(err_string_lock);
          err_string_lock = NULL;
          return 0;
      }
      return 1;
  }
  
  void err_cleanup(void)
  {
      if (set_err_thread_local != 0)
          CRYPTO_THREAD_cleanup_local(&err_thread_local);
      CRYPTO_THREAD_lock_free(err_string_lock);
      err_string_lock = NULL;
      lh_ERR_STRING_DATA_free(int_error_hash);
      int_error_hash = NULL;
  }
  
  /*
   * Legacy; pack in the library.
   */
  static void err_patch(int lib, ERR_STRING_DATA *str)
  {
      unsigned long plib = ERR_PACK(lib, 0, 0);
  
      for (; str->error != 0; str++)
          str->error |= plib;
  }
  
  /*
   * Hash in |str| error strings. Assumes the URN_ONCE was done.
   */
  static int err_load_strings(const ERR_STRING_DATA *str)
  {
      CRYPTO_THREAD_write_lock(err_string_lock);
      for (; str->error; str++)
          (void)lh_ERR_STRING_DATA_insert(int_error_hash,
                                         (ERR_STRING_DATA *)str);
      CRYPTO_THREAD_unlock(err_string_lock);
      return 1;
  }
  
  int ERR_load_ERR_strings(void)
  {
  #ifndef OPENSSL_NO_ERR
      if (!RUN_ONCE(&err_string_init, do_err_strings_init))
          return 0;
  
      err_load_strings(ERR_str_libraries);
      err_load_strings(ERR_str_reasons);
      err_patch(ERR_LIB_SYS, ERR_str_functs);
      err_load_strings(ERR_str_functs);
      build_SYS_str_reasons();
  #endif
      return 1;
  }
  
  int ERR_load_strings(int lib, ERR_STRING_DATA *str)
  {
      if (ERR_load_ERR_strings() == 0)
          return 0;
  
      err_patch(lib, str);
      err_load_strings(str);
      return 1;
  }
  
  int ERR_load_strings_const(const ERR_STRING_DATA *str)
  {
      if (ERR_load_ERR_strings() == 0)
          return 0;
      err_load_strings(str);
      return 1;
  }
  
  int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
  {
      if (!RUN_ONCE(&err_string_init, do_err_strings_init))
          return 0;
  
      CRYPTO_THREAD_write_lock(err_string_lock);
      /*
       * We don't need to ERR_PACK the lib, since that was done (to
       * the table) when it was loaded.
       */
      for (; str->error; str++)
          (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
      CRYPTO_THREAD_unlock(err_string_lock);
  
      return 1;
  }
  
  void err_free_strings_int(void)
  {
      if (!RUN_ONCE(&err_string_init, do_err_strings_init))
          return;
  }
  
  /********************************************************/
  
  void ERR_put_error(int lib, int func, int reason, const char *file, int line)
  {
      ERR_STATE *es;
  
  #ifdef _OSD_POSIX
      /*
       * In the BS2000-OSD POSIX subsystem, the compiler generates path names
       * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
       * something sensible. @@@ We shouldn't modify a const string, though.
       */
      if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
          char *end;
  
          /* Skip the "*POSIX(" prefix */
          file += sizeof("*POSIX(") - 1;
          end = &file[strlen(file) - 1];
          if (*end == ')')
              *end = '\0';
          /* Optional: use the basename of the path only. */
          if ((end = strrchr(file, '/')) != NULL)
              file = &end[1];
      }
  #endif
      es = ERR_get_state();
      if (es == NULL)
          return;
  
      es->top = (es->top + 1) % ERR_NUM_ERRORS;
      if (es->top == es->bottom)
          es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
      es->err_flags[es->top] = 0;
      es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
      es->err_file[es->top] = file;
      es->err_line[es->top] = line;
      err_clear_data(es, es->top);
  }
  
  void ERR_clear_error(void)
  {
      int i;
      ERR_STATE *es;
  
      es = ERR_get_state();
      if (es == NULL)
          return;
  
      for (i = 0; i < ERR_NUM_ERRORS; i++) {
          err_clear(es, i);
      }
      es->top = es->bottom = 0;
  }
  
  unsigned long ERR_get_error(void)
  {
      return get_error_values(1, 0, NULL, NULL, NULL, NULL);
  }
  
  unsigned long ERR_get_error_line(const char **file, int *line)
  {
      return get_error_values(1, 0, file, line, NULL, NULL);
  }
  
  unsigned long ERR_get_error_line_data(const char **file, int *line,
                                        const char **data, int *flags)
  {
      return get_error_values(1, 0, file, line, data, flags);
  }
  
  unsigned long ERR_peek_error(void)
  {
      return get_error_values(0, 0, NULL, NULL, NULL, NULL);
  }
  
  unsigned long ERR_peek_error_line(const char **file, int *line)
  {
      return get_error_values(0, 0, file, line, NULL, NULL);
  }
  
  unsigned long ERR_peek_error_line_data(const char **file, int *line,
                                         const char **data, int *flags)
  {
      return get_error_values(0, 0, file, line, data, flags);
  }
  
  unsigned long ERR_peek_last_error(void)
  {
      return get_error_values(0, 1, NULL, NULL, NULL, NULL);
  }
  
  unsigned long ERR_peek_last_error_line(const char **file, int *line)
  {
      return get_error_values(0, 1, file, line, NULL, NULL);
  }
  
  unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
                                              const char **data, int *flags)
  {
      return get_error_values(0, 1, file, line, data, flags);
  }
  
  static unsigned long get_error_values(int inc, int top, const char **file,
                                        int *line, const char **data,
                                        int *flags)
  {
      int i = 0;
      ERR_STATE *es;
      unsigned long ret;
  
      es = ERR_get_state();
      if (es == NULL)
          return 0;
  
      if (inc && top) {
          if (file)
              *file = "";
          if (line)
              *line = 0;
          if (data)
              *data = "";
          if (flags)
              *flags = 0;
  
          return ERR_R_INTERNAL_ERROR;
      }
  
      if (es->bottom == es->top)
          return 0;
      if (top)
          i = es->top;            /* last error */
      else
          i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
  
      ret = es->err_buffer[i];
      if (inc) {
          es->bottom = i;
          es->err_buffer[i] = 0;
      }
  
      if (file != NULL && line != NULL) {
          if (es->err_file[i] == NULL) {
              *file = "NA";
              *line = 0;
          } else {
              *file = es->err_file[i];
              *line = es->err_line[i];
          }
      }
  
      if (data == NULL) {
          if (inc) {
              err_clear_data(es, i);
          }
      } else {
          if (es->err_data[i] == NULL) {
              *data = "";
              if (flags != NULL)
                  *flags = 0;
          } else {
              *data = es->err_data[i];
              if (flags != NULL)
                  *flags = es->err_data_flags[i];
          }
      }
      return ret;
  }
  
  void ERR_error_string_n(unsigned long e, char *buf, size_t len)
  {
      char lsbuf[64], fsbuf[64], rsbuf[64];
      const char *ls, *fs, *rs;
      unsigned long l, f, r;
  
      if (len == 0)
          return;
  
      l = ERR_GET_LIB(e);
      ls = ERR_lib_error_string(e);
      if (ls == NULL) {
          BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
          ls = lsbuf;
      }
  
      fs = ERR_func_error_string(e);
      f = ERR_GET_FUNC(e);
      if (fs == NULL) {
          BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
          fs = fsbuf;
      }
  
      rs = ERR_reason_error_string(e);
      r = ERR_GET_REASON(e);
      if (rs == NULL) {
          BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
          rs = rsbuf;
      }
  
      BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, fs, rs);
      if (strlen(buf) == len - 1) {
          /* Didn't fit; use a minimal format. */
          BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r);
      }
  }
  
  /*
   * ERR_error_string_n should be used instead for ret != NULL as
   * ERR_error_string cannot know how large the buffer is
   */
  char *ERR_error_string(unsigned long e, char *ret)
  {
      static char buf[256];
  
      if (ret == NULL)
          ret = buf;
      ERR_error_string_n(e, ret, (int)sizeof(buf));
      return ret;
  }
  
  const char *ERR_lib_error_string(unsigned long e)
  {
      ERR_STRING_DATA d, *p;
      unsigned long l;
  
      if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
          return NULL;
      }
  
      l = ERR_GET_LIB(e);
      d.error = ERR_PACK(l, 0, 0);
      p = int_err_get_item(&d);
      return ((p == NULL) ? NULL : p->string);
  }
  
  const char *ERR_func_error_string(unsigned long e)
  {
      ERR_STRING_DATA d, *p;
      unsigned long l, f;
  
      if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
          return NULL;
      }
  
      l = ERR_GET_LIB(e);
      f = ERR_GET_FUNC(e);
      d.error = ERR_PACK(l, f, 0);
      p = int_err_get_item(&d);
      return ((p == NULL) ? NULL : p->string);
  }
  
  const char *ERR_reason_error_string(unsigned long e)
  {
      ERR_STRING_DATA d, *p = NULL;
      unsigned long l, r;
  
      if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
          return NULL;
      }
  
      l = ERR_GET_LIB(e);
      r = ERR_GET_REASON(e);
      d.error = ERR_PACK(l, 0, r);
      p = int_err_get_item(&d);
      if (!p) {
          d.error = ERR_PACK(0, 0, r);
          p = int_err_get_item(&d);
      }
      return ((p == NULL) ? NULL : p->string);
  }
  
  void err_delete_thread_state(void)
  {
      ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);
      if (state == NULL)
          return;
  
      CRYPTO_THREAD_set_local(&err_thread_local, NULL);
      ERR_STATE_free(state);
  }
  
  #if OPENSSL_API_COMPAT < 0x10100000L
  void ERR_remove_thread_state(void *dummy)
  {
  }
  #endif
  
  #if OPENSSL_API_COMPAT < 0x10000000L
  void ERR_remove_state(unsigned long pid)
  {
  }
  #endif
  
  DEFINE_RUN_ONCE_STATIC(err_do_init)
  {
      set_err_thread_local = 1;
      return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
  }
  
  ERR_STATE *ERR_get_state(void)
  {
      ERR_STATE *state;
  
      if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
          return NULL;
  
      if (!RUN_ONCE(&err_init, err_do_init))
          return NULL;
  
      state = CRYPTO_THREAD_get_local(&err_thread_local);
      if (state == (ERR_STATE*)-1)
          return NULL;
  
      if (state == NULL) {
          if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
              return NULL;
  
          if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) {
              CRYPTO_THREAD_set_local(&err_thread_local, NULL);
              return NULL;
          }
  
          if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE)
                  || !CRYPTO_THREAD_set_local(&err_thread_local, state)) {
              ERR_STATE_free(state);
              CRYPTO_THREAD_set_local(&err_thread_local, NULL);
              return NULL;
          }
  
          /* Ignore failures from these */
          OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
      }
  
      return state;
  }
  
  /*
   * err_shelve_state returns the current thread local error state
   * and freezes the error module until err_unshelve_state is called.
   */
  int err_shelve_state(void **state)
  {
      if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
          return 0;
  
      if (!RUN_ONCE(&err_init, err_do_init))
          return 0;
  
      *state = CRYPTO_THREAD_get_local(&err_thread_local);
      if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
          return 0;
  
      return 1;
  }
  
  /*
   * err_unshelve_state restores the error state that was returned
   * by err_shelve_state previously.
   */
  void err_unshelve_state(void* state)
  {
      if (state != (void*)-1)
          CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state);
  }
  
  int ERR_get_next_error_library(void)
  {
      int ret;
  
      if (!RUN_ONCE(&err_string_init, do_err_strings_init))
          return 0;
  
      CRYPTO_THREAD_write_lock(err_string_lock);
      ret = int_err_library_number++;
      CRYPTO_THREAD_unlock(err_string_lock);
      return ret;
  }
  
  void ERR_set_error_data(char *data, int flags)
  {
      ERR_STATE *es;
      int i;
  
      es = ERR_get_state();
      if (es == NULL)
          return;
  
      i = es->top;
  
      err_clear_data(es, i);
      es->err_data[i] = data;
      es->err_data_flags[i] = flags;
  }
  
  void ERR_add_error_data(int num, ...)
  {
      va_list args;
      va_start(args, num);
      ERR_add_error_vdata(num, args);
      va_end(args);
  }
  
  void ERR_add_error_vdata(int num, va_list args)
  {
      int i, n, s;
      char *str, *p, *a;
  
      s = 80;
      if ((str = OPENSSL_malloc(s + 1)) == NULL) {
          /* ERRerr(ERR_F_ERR_ADD_ERROR_VDATA, ERR_R_MALLOC_FAILURE); */
          return;
      }
      str[0] = '\0';
  
      n = 0;
      for (i = 0; i < num; i++) {
          a = va_arg(args, char *);
          if (a == NULL)
              a = "<NULL>";
          n += strlen(a);
          if (n > s) {
              s = n + 20;
              p = OPENSSL_realloc(str, s + 1);
              if (p == NULL) {
                  OPENSSL_free(str);
                  return;
              }
              str = p;
          }
          OPENSSL_strlcat(str, a, (size_t)s + 1);
      }
      ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
  }
  
  int ERR_set_mark(void)
  {
      ERR_STATE *es;
  
      es = ERR_get_state();
      if (es == NULL)
          return 0;
  
      if (es->bottom == es->top)
          return 0;
      es->err_flags[es->top] |= ERR_FLAG_MARK;
      return 1;
  }
  
  int ERR_pop_to_mark(void)
  {
      ERR_STATE *es;
  
      es = ERR_get_state();
      if (es == NULL)
          return 0;
  
      while (es->bottom != es->top
             && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
          err_clear(es, es->top);
          es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
      }
  
      if (es->bottom == es->top)
          return 0;
      es->err_flags[es->top] &= ~ERR_FLAG_MARK;
      return 1;
  }
  
  int ERR_clear_last_mark(void)
  {
      ERR_STATE *es;
      int top;
  
      es = ERR_get_state();
      if (es == NULL)
          return 0;
  
      top = es->top;
      while (es->bottom != top
             && (es->err_flags[top] & ERR_FLAG_MARK) == 0) {
          top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
      }
  
      if (es->bottom == top)
          return 0;
      es->err_flags[top] &= ~ERR_FLAG_MARK;
      return 1;
  }
  
  void err_clear_last_constant_time(int clear)
  {
      ERR_STATE *es;
      int top;
  
      es = ERR_get_state();
      if (es == NULL)
          return;
  
      top = es->top;
  
      es->err_flags[top] &= ~(0 - clear);
      es->err_buffer[top] &= ~(0UL - clear);
      es->err_file[top] = (const char *)((uintptr_t)es->err_file[top] &
                                         ~((uintptr_t)0 - clear));
      es->err_line[top] |= 0 - clear;
  
      es->top = (top + ERR_NUM_ERRORS - clear) % ERR_NUM_ERRORS;
  }
  