include/openssl/crypto.h

   1 /*
   2  * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
   3  * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
   4  *
   5  * Licensed under the Apache License 2.0 (the "License").  You may not use
   6  * this file except in compliance with the License.  You can obtain a copy
   7  * in the file LICENSE in the source distribution or at
   8  * https://www.openssl.org/source/license.html
   9  */
  10
  11 #ifndef HEADER_CRYPTO_H
  12 # define HEADER_CRYPTO_H
  13
  14 # include <stdlib.h>
  15 # include <time.h>
  16
  17 # include <openssl/e_os2.h>
  18
  19 # ifndef OPENSSL_NO_STDIO
  20 #  include <stdio.h>
  21 # endif
  22
  23 # include <openssl/safestack.h>
  24 # include <openssl/opensslv.h>
  25 # include <openssl/ossl_typ.h>
  26 # include <openssl/opensslconf.h>
  27 # include <openssl/cryptoerr.h>
  28
  29 # ifdef CHARSET_EBCDIC
  30 #  include <openssl/ebcdic.h>
  31 # endif
  32
  33 /*
  34  * Resolve problems on some operating systems with symbol names that clash
  35  * one way or another
  36  */
  37 # include <openssl/symhacks.h>
  38
  39 # if !OPENSSL_API_1_1_0
  40 #  include <openssl/opensslv.h>
  41 # endif
  42
  43 #ifdef  __cplusplus
  44 extern "C" {
  45 #endif
  46
  47 # if !OPENSSL_API_1_1_0
  48 #  define SSLeay                  OpenSSL_version_num
  49 #  define SSLeay_version          OpenSSL_version
  50 #  define SSLEAY_VERSION_NUMBER   OPENSSL_VERSION_NUMBER
  51 #  define SSLEAY_VERSION          OPENSSL_VERSION
  52 #  define SSLEAY_CFLAGS           OPENSSL_CFLAGS
  53 #  define SSLEAY_BUILT_ON         OPENSSL_BUILT_ON
  54 #  define SSLEAY_PLATFORM         OPENSSL_PLATFORM
  55 #  define SSLEAY_DIR              OPENSSL_DIR
  56
  57 /*
  58  * Old type for allocating dynamic locks. No longer used. Use the new thread
  59  * API instead.
  60  */
  61 typedef struct {
  62     int dummy;
  63 } CRYPTO_dynlock;
  64
  65 # endif /* OPENSSL_API_1_1_0 */
  66
  67 typedef void CRYPTO_RWLOCK;
  68
  69 CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void);
  70 int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock);
  71 int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock);
  72 int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock);
  73 void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock);
  74
  75 int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock);
  76
  77 /*
  78  * The following can be used to detect memory leaks in the library. If
  79  * used, it turns on malloc checking
  80  */
  81 # define CRYPTO_MEM_CHECK_OFF     0x0   /* Control only */
  82 # define CRYPTO_MEM_CHECK_ON      0x1   /* Control and mode bit */
  83 # define CRYPTO_MEM_CHECK_ENABLE  0x2   /* Control and mode bit */
  84 # define CRYPTO_MEM_CHECK_DISABLE 0x3   /* Control only */
  85
  86 struct crypto_ex_data_st {
  87     STACK_OF(void) *sk;
  88 };
  89 DEFINE_STACK_OF(void)
  90
  91 /*
  92  * Per class, we have a STACK of function pointers.
  93  */
  94 # define CRYPTO_EX_INDEX_SSL              0
  95 # define CRYPTO_EX_INDEX_SSL_CTX          1
  96 # define CRYPTO_EX_INDEX_SSL_SESSION      2
  97 # define CRYPTO_EX_INDEX_X509             3
  98 # define CRYPTO_EX_INDEX_X509_STORE       4
  99 # define CRYPTO_EX_INDEX_X509_STORE_CTX   5
 100 # define CRYPTO_EX_INDEX_DH               6
 101 # define CRYPTO_EX_INDEX_DSA              7
 102 # define CRYPTO_EX_INDEX_EC_KEY           8
 103 # define CRYPTO_EX_INDEX_RSA              9
 104 # define CRYPTO_EX_INDEX_ENGINE          10
 105 # define CRYPTO_EX_INDEX_UI              11
 106 # define CRYPTO_EX_INDEX_BIO             12
 107 # define CRYPTO_EX_INDEX_APP             13
 108 # define CRYPTO_EX_INDEX_UI_METHOD       14
 109 # define CRYPTO_EX_INDEX_DRBG            15
 110 # define CRYPTO_EX_INDEX_OPENSSL_CTX     16
 111 # define CRYPTO_EX_INDEX__COUNT          17
 112
 113 /* No longer needed, so this is a no-op */
 114 #define OPENSSL_malloc_init() while(0) continue
 115
 116 int CRYPTO_mem_ctrl(int mode);
 117
 118 # define OPENSSL_malloc(num) \
 119         CRYPTO_malloc(num, OPENSSL_FILE, OPENSSL_LINE)
 120 # define OPENSSL_zalloc(num) \
 121         CRYPTO_zalloc(num, OPENSSL_FILE, OPENSSL_LINE)
 122 # define OPENSSL_realloc(addr, num) \
 123         CRYPTO_realloc(addr, num, OPENSSL_FILE, OPENSSL_LINE)
 124 # define OPENSSL_clear_realloc(addr, old_num, num) \
 125         CRYPTO_clear_realloc(addr, old_num, num, OPENSSL_FILE, OPENSSL_LINE)
 126 # define OPENSSL_clear_free(addr, num) \
 127         CRYPTO_clear_free(addr, num, OPENSSL_FILE, OPENSSL_LINE)
 128 # define OPENSSL_free(addr) \
 129         CRYPTO_free(addr, OPENSSL_FILE, OPENSSL_LINE)
 130 # define OPENSSL_memdup(str, s) \
 131         CRYPTO_memdup((str), s, OPENSSL_FILE, OPENSSL_LINE)
 132 # define OPENSSL_strdup(str) \
 133         CRYPTO_strdup(str, OPENSSL_FILE, OPENSSL_LINE)
 134 # define OPENSSL_strndup(str, n) \
 135         CRYPTO_strndup(str, n, OPENSSL_FILE, OPENSSL_LINE)
 136 # define OPENSSL_secure_malloc(num) \
 137         CRYPTO_secure_malloc(num, OPENSSL_FILE, OPENSSL_LINE)
 138 # define OPENSSL_secure_zalloc(num) \
 139         CRYPTO_secure_zalloc(num, OPENSSL_FILE, OPENSSL_LINE)
 140 # define OPENSSL_secure_free(addr) \
 141         CRYPTO_secure_free(addr, OPENSSL_FILE, OPENSSL_LINE)
 142 # define OPENSSL_secure_clear_free(addr, num) \
 143         CRYPTO_secure_clear_free(addr, num, OPENSSL_FILE, OPENSSL_LINE)
 144 # define OPENSSL_secure_actual_size(ptr) \
 145         CRYPTO_secure_actual_size(ptr)
 146
 147 size_t OPENSSL_strlcpy(char *dst, const char *src, size_t siz);
 148 size_t OPENSSL_strlcat(char *dst, const char *src, size_t siz);
 149 size_t OPENSSL_strnlen(const char *str, size_t maxlen);
 150 char *OPENSSL_buf2hexstr(const unsigned char *buffer, long len);
 151 unsigned char *OPENSSL_hexstr2buf(const char *str, long *len);
 152 int OPENSSL_hexchar2int(unsigned char c);
 153
 154 # define OPENSSL_MALLOC_MAX_NELEMS(type)  (((1U<<(sizeof(int)*8-1))-1)/sizeof(type))
 155
 156 DEPRECATEDIN_3(unsigned long OpenSSL_version_num(void))
 157 const char *OpenSSL_version(int type);
 158 # define OPENSSL_VERSION                0
 159 # define OPENSSL_CFLAGS                 1
 160 # define OPENSSL_BUILT_ON               2
 161 # define OPENSSL_PLATFORM               3
 162 # define OPENSSL_DIR                    4
 163 # define OPENSSL_ENGINES_DIR            5
 164 # define OPENSSL_VERSION_STRING         6
 165 # define OPENSSL_FULL_VERSION_STRING    7
 166
 167 int OPENSSL_issetugid(void);
 168
 169 typedef void CRYPTO_EX_new (void *parent, void *ptr, CRYPTO_EX_DATA *ad,
 170                            int idx, long argl, void *argp);
 171 typedef void CRYPTO_EX_free (void *parent, void *ptr, CRYPTO_EX_DATA *ad,
 172                              int idx, long argl, void *argp);
 173 typedef int CRYPTO_EX_dup (CRYPTO_EX_DATA *to, const CRYPTO_EX_DATA *from,
 174                            void *from_d, int idx, long argl, void *argp);
 175 __owur int CRYPTO_get_ex_new_index(int class_index, long argl, void *argp,
 176                             CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func,
 177                             CRYPTO_EX_free *free_func);
 178 /* No longer use an index. */
 179 int CRYPTO_free_ex_index(int class_index, int idx);
 180
 181 /*
 182  * Initialise/duplicate/free CRYPTO_EX_DATA variables corresponding to a
 183  * given class (invokes whatever per-class callbacks are applicable)
 184  */
 185 int CRYPTO_new_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
 186 int CRYPTO_dup_ex_data(int class_index, CRYPTO_EX_DATA *to,
 187                        const CRYPTO_EX_DATA *from);
 188
 189 void CRYPTO_free_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad);
 190
 191 /* Allocate a single item in the CRYPTO_EX_DATA variable */
 192 int CRYPTO_alloc_ex_data(int class_index, void *obj, CRYPTO_EX_DATA *ad,
 193                          int idx);
 194
 195 /*
 196  * Get/set data in a CRYPTO_EX_DATA variable corresponding to a particular
 197  * index (relative to the class type involved)
 198  */
 199 int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int idx, void *val);
 200 void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int idx);
 201
 202 # if !OPENSSL_API_1_1_0
 203 /*
 204  * This function cleans up all "ex_data" state. It mustn't be called under
 205  * potential race-conditions.
 206  */
 207 # define CRYPTO_cleanup_all_ex_data() while(0) continue
 208
 209 /*
 210  * The old locking functions have been removed completely without compatibility
 211  * macros. This is because the old functions either could not properly report
 212  * errors, or the returned error values were not clearly documented.
 213  * Replacing the locking functions with no-ops would cause race condition
 214  * issues in the affected applications. It is far better for them to fail at
 215  * compile time.
 216  * On the other hand, the locking callbacks are no longer used.  Consequently,
 217  * the callback management functions can be safely replaced with no-op macros.
 218  */
 219 #  define CRYPTO_num_locks()            (1)
 220 #  define CRYPTO_set_locking_callback(func)
 221 #  define CRYPTO_get_locking_callback()         (NULL)
 222 #  define CRYPTO_set_add_lock_callback(func)
 223 #  define CRYPTO_get_add_lock_callback()        (NULL)
 224
 225 /*
 226  * These defines where used in combination with the old locking callbacks,
 227  * they are not called anymore, but old code that's not called might still
 228  * use them.
 229  */
 230 #  define CRYPTO_LOCK             1
 231 #  define CRYPTO_UNLOCK           2
 232 #  define CRYPTO_READ             4
 233 #  define CRYPTO_WRITE            8
 234
 235 /* This structure is no longer used */
 236 typedef struct crypto_threadid_st {
 237     int dummy;
 238 } CRYPTO_THREADID;
 239 /* Only use CRYPTO_THREADID_set_[numeric|pointer]() within callbacks */
 240 #  define CRYPTO_THREADID_set_numeric(id, val)
 241 #  define CRYPTO_THREADID_set_pointer(id, ptr)
 242 #  define CRYPTO_THREADID_set_callback(threadid_func)   (0)
 243 #  define CRYPTO_THREADID_get_callback()                (NULL)
 244 #  define CRYPTO_THREADID_current(id)
 245 #  define CRYPTO_THREADID_cmp(a, b)                     (-1)
 246 #  define CRYPTO_THREADID_cpy(dest, src)
 247 #  define CRYPTO_THREADID_hash(id)                      (0UL)
 248
 249 #  if !OPENSSL_API_1_0_0
 250 #   define CRYPTO_set_id_callback(func)
 251 #   define CRYPTO_get_id_callback()                     (NULL)
 252 #   define CRYPTO_thread_id()                           (0UL)
 253 #  endif /* OPENSSL_API_1_0_0 */
 254
 255 #  define CRYPTO_set_dynlock_create_callback(dyn_create_function)
 256 #  define CRYPTO_set_dynlock_lock_callback(dyn_lock_function)
 257 #  define CRYPTO_set_dynlock_destroy_callback(dyn_destroy_function)
 258 #  define CRYPTO_get_dynlock_create_callback()          (NULL)
 259 #  define CRYPTO_get_dynlock_lock_callback()            (NULL)
 260 #  define CRYPTO_get_dynlock_destroy_callback()         (NULL)
 261 # endif /* OPENSSL_API_1_1_0 */
 262
 263 int CRYPTO_set_mem_functions(
 264         void *(*m) (size_t, const char *, int),
 265         void *(*r) (void *, size_t, const char *, int),
 266         void (*f) (void *, const char *, int));
 267 int CRYPTO_set_mem_debug(int flag);
 268 void CRYPTO_get_mem_functions(
 269         void *(**m) (size_t, const char *, int),
 270         void *(**r) (void *, size_t, const char *, int),
 271         void (**f) (void *, const char *, int));
 272
 273 void *CRYPTO_malloc(size_t num, const char *file, int line);
 274 void *CRYPTO_zalloc(size_t num, const char *file, int line);
 275 void *CRYPTO_memdup(const void *str, size_t siz, const char *file, int line);
 276 char *CRYPTO_strdup(const char *str, const char *file, int line);
 277 char *CRYPTO_strndup(const char *str, size_t s, const char *file, int line);
 278 void CRYPTO_free(void *ptr, const char *file, int line);
 279 void CRYPTO_clear_free(void *ptr, size_t num, const char *file, int line);
 280 void *CRYPTO_realloc(void *addr, size_t num, const char *file, int line);
 281 void *CRYPTO_clear_realloc(void *addr, size_t old_num, size_t num,
 282                            const char *file, int line);
 283
 284 int CRYPTO_secure_malloc_init(size_t sz, int minsize);
 285 int CRYPTO_secure_malloc_done(void);
 286 void *CRYPTO_secure_malloc(size_t num, const char *file, int line);
 287 void *CRYPTO_secure_zalloc(size_t num, const char *file, int line);
 288 void CRYPTO_secure_free(void *ptr, const char *file, int line);
 289 void CRYPTO_secure_clear_free(void *ptr, size_t num,
 290                               const char *file, int line);
 291 int CRYPTO_secure_allocated(const void *ptr);
 292 int CRYPTO_secure_malloc_initialized(void);
 293 size_t CRYPTO_secure_actual_size(void *ptr);
 294 size_t CRYPTO_secure_used(void);
 295
 296 void OPENSSL_cleanse(void *ptr, size_t len);
 297
 298 # ifndef OPENSSL_NO_CRYPTO_MDEBUG
 299 #  define OPENSSL_mem_debug_push(info) \
 300         CRYPTO_mem_debug_push(info, OPENSSL_FILE, OPENSSL_LINE)
 301 #  define OPENSSL_mem_debug_pop() \
 302         CRYPTO_mem_debug_pop()
 303 int CRYPTO_mem_debug_push(const char *info, const char *file, int line);
 304 int CRYPTO_mem_debug_pop(void);
 305 void CRYPTO_get_alloc_counts(int *mcount, int *rcount, int *fcount);
 306
 307 /*-
 308  * Debugging functions (enabled by CRYPTO_set_mem_debug(1))
 309  * The flag argument has the following significance:
 310  *   0:   called before the actual memory allocation has taken place
 311  *   1:   called after the actual memory allocation has taken place
 312  */
 313 void CRYPTO_mem_debug_malloc(void *addr, size_t num, int flag,
 314         const char *file, int line);
 315 void CRYPTO_mem_debug_realloc(void *addr1, void *addr2, size_t num, int flag,
 316         const char *file, int line);
 317 void CRYPTO_mem_debug_free(void *addr, int flag,
 318         const char *file, int line);
 319
 320 int CRYPTO_mem_leaks_cb(int (*cb) (const char *str, size_t len, void *u),
 321                         void *u);
 322 #  ifndef OPENSSL_NO_STDIO
 323 int CRYPTO_mem_leaks_fp(FILE *);
 324 #  endif
 325 int CRYPTO_mem_leaks(BIO *bio);
 326 # endif
 327
 328 /* die if we have to */
 329 ossl_noreturn void OPENSSL_die(const char *assertion, const char *file, int line);
 330 # if !OPENSSL_API_1_1_0
 331 #  define OpenSSLDie(f,l,a) OPENSSL_die((a),(f),(l))
 332 # endif
 333 # define OPENSSL_assert(e) \
 334     (void)((e) ? 0 : (OPENSSL_die("assertion failed: " #e, OPENSSL_FILE, OPENSSL_LINE), 1))
 335
 336 int OPENSSL_isservice(void);
 337
 338 int FIPS_mode(void);
 339 int FIPS_mode_set(int r);
 340
 341 void OPENSSL_init(void);
 342 # ifdef OPENSSL_SYS_UNIX
 343 void OPENSSL_fork_prepare(void);
 344 void OPENSSL_fork_parent(void);
 345 void OPENSSL_fork_child(void);
 346 # endif
 347
 348 struct tm *OPENSSL_gmtime(const time_t *timer, struct tm *result);
 349 int OPENSSL_gmtime_adj(struct tm *tm, int offset_day, long offset_sec);
 350 int OPENSSL_gmtime_diff(int *pday, int *psec,
 351                         const struct tm *from, const struct tm *to);
 352
 353 /*
 354  * CRYPTO_memcmp returns zero iff the |len| bytes at |a| and |b| are equal.
 355  * It takes an amount of time dependent on |len|, but independent of the
 356  * contents of |a| and |b|. Unlike memcmp, it cannot be used to put elements
 357  * into a defined order as the return value when a != b is undefined, other
 358  * than to be non-zero.
 359  */
 360 int CRYPTO_memcmp(const void * in_a, const void * in_b, size_t len);
 361
 362 /* Standard initialisation options */
 363 # define OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS 0x00000001L
 364 # define OPENSSL_INIT_LOAD_CRYPTO_STRINGS    0x00000002L
 365 # define OPENSSL_INIT_ADD_ALL_CIPHERS        0x00000004L
 366 # define OPENSSL_INIT_ADD_ALL_DIGESTS        0x00000008L
 367 # define OPENSSL_INIT_NO_ADD_ALL_CIPHERS     0x00000010L
 368 # define OPENSSL_INIT_NO_ADD_ALL_DIGESTS     0x00000020L
 369 # define OPENSSL_INIT_LOAD_CONFIG            0x00000040L
 370 # define OPENSSL_INIT_NO_LOAD_CONFIG         0x00000080L
 371 # define OPENSSL_INIT_ASYNC                  0x00000100L
 372 # define OPENSSL_INIT_ENGINE_RDRAND          0x00000200L
 373 # define OPENSSL_INIT_ENGINE_DYNAMIC         0x00000400L
 374 # define OPENSSL_INIT_ENGINE_OPENSSL         0x00000800L
 375 # define OPENSSL_INIT_ENGINE_CRYPTODEV       0x00001000L
 376 # define OPENSSL_INIT_ENGINE_CAPI            0x00002000L
 377 # define OPENSSL_INIT_ENGINE_PADLOCK         0x00004000L
 378 # define OPENSSL_INIT_ENGINE_AFALG           0x00008000L
 379 /* OPENSSL_INIT_ZLIB                         0x00010000L */
 380 # define OPENSSL_INIT_ATFORK                 0x00020000L
 381 /* OPENSSL_INIT_BASE_ONLY                    0x00040000L */
 382 # define OPENSSL_INIT_NO_ATEXIT              0x00080000L
 383 /* OPENSSL_INIT flag range 0x03f00000 reserved for OPENSSL_init_ssl() */
 384 # define OPENSSL_INIT_NO_ADD_ALL_MACS        0x04000000L
 385 # define OPENSSL_INIT_ADD_ALL_MACS           0x08000000L
 386 /* FREE: 0x10000000L */
 387 /* FREE: 0x20000000L */
 388 /* FREE: 0x40000000L */
 389 /* FREE: 0x80000000L */
 390 /* Max OPENSSL_INIT flag value is 0x80000000 */
 391
 392 /* openssl and dasync not counted as builtin */
 393 # define OPENSSL_INIT_ENGINE_ALL_BUILTIN \
 394     (OPENSSL_INIT_ENGINE_RDRAND | OPENSSL_INIT_ENGINE_DYNAMIC \
 395     | OPENSSL_INIT_ENGINE_CRYPTODEV | OPENSSL_INIT_ENGINE_CAPI | \
 396     OPENSSL_INIT_ENGINE_PADLOCK)
 397
 398
 399 /* Library initialisation functions */
 400 void OPENSSL_cleanup(void);
 401 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings);
 402 int OPENSSL_atexit(void (*handler)(void));
 403 void OPENSSL_thread_stop(void);
 404
 405 /* Low-level control of initialization */
 406 OPENSSL_INIT_SETTINGS *OPENSSL_INIT_new(void);
 407 # ifndef OPENSSL_NO_STDIO
 408 int OPENSSL_INIT_set_config_filename(OPENSSL_INIT_SETTINGS *settings,
 409                                      const char *config_filename);
 410 void OPENSSL_INIT_set_config_file_flags(OPENSSL_INIT_SETTINGS *settings,
 411                                         unsigned long flags);
 412 int OPENSSL_INIT_set_config_appname(OPENSSL_INIT_SETTINGS *settings,
 413                                     const char *config_appname);
 414 # endif
 415 void OPENSSL_INIT_free(OPENSSL_INIT_SETTINGS *settings);
 416
 417 # if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG)
 418 #  if defined(_WIN32)
 419 #   if defined(BASETYPES) || defined(_WINDEF_H)
 420 /* application has to include <windows.h> in order to use this */
 421 typedef DWORD CRYPTO_THREAD_LOCAL;
 422 typedef DWORD CRYPTO_THREAD_ID;
 423
 424 typedef LONG CRYPTO_ONCE;
 425 #    define CRYPTO_ONCE_STATIC_INIT 0
 426 #   endif
 427 #  else
 428 #   include <pthread.h>
 429 typedef pthread_once_t CRYPTO_ONCE;
 430 typedef pthread_key_t CRYPTO_THREAD_LOCAL;
 431 typedef pthread_t CRYPTO_THREAD_ID;
 432
 433 #   define CRYPTO_ONCE_STATIC_INIT PTHREAD_ONCE_INIT
 434 #  endif
 435 # endif
 436
 437 # if !defined(CRYPTO_ONCE_STATIC_INIT)
 438 typedef unsigned int CRYPTO_ONCE;
 439 typedef unsigned int CRYPTO_THREAD_LOCAL;
 440 typedef unsigned int CRYPTO_THREAD_ID;
 441 #  define CRYPTO_ONCE_STATIC_INIT 0
 442 # endif
 443
 444 int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void));
 445
 446 int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *));
 447 void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key);
 448 int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val);
 449 int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key);
 450
 451 CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void);
 452 int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b);
 453
 454 OPENSSL_CTX *OPENSSL_CTX_new(void);
 455 void OPENSSL_CTX_free(OPENSSL_CTX *);
 456
 457 # ifdef  __cplusplus
 458 }
 459 # endif
 460 #endif