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- /* Copyright (c) 2014, Google Inc.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
- * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
- * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
-
- #ifndef OPENSSL_HEADER_RAND_H
- #define OPENSSL_HEADER_RAND_H
-
- #include <openssl/base.h>
-
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
-
- /* Random number generation. */
-
-
- /* RAND_bytes writes |len| bytes of random data to |buf| and returns one. */
- OPENSSL_EXPORT int RAND_bytes(uint8_t *buf, size_t len);
-
- /* RAND_cleanup frees any resources used by the RNG. This is not safe if other
- * threads might still be calling |RAND_bytes|. */
- OPENSSL_EXPORT void RAND_cleanup(void);
-
-
- /* Obscure functions. */
-
- #if !defined(OPENSSL_WINDOWS)
- /* RAND_set_urandom_fd causes the module to use a copy of |fd| for system
- * randomness rather opening /dev/urandom internally. The caller retains
- * ownership of |fd| and is at liberty to close it at any time. This is useful
- * if, due to a sandbox, /dev/urandom isn't available. If used, it must be
- * called before |RAND_bytes| is called in the current address space.
- *
- * |RAND_set_urandom_fd| does not buffer any entropy, so it is safe to call
- * |fork| between |RAND_set_urandom_fd| and the first call to |RAND_bytes|. */
- OPENSSL_EXPORT void RAND_set_urandom_fd(int fd);
- #endif
-
-
- /* Deprecated functions */
-
- /* RAND_pseudo_bytes is a wrapper around |RAND_bytes|. */
- OPENSSL_EXPORT int RAND_pseudo_bytes(uint8_t *buf, size_t len);
-
- /* RAND_seed does nothing. */
- OPENSSL_EXPORT void RAND_seed(const void *buf, int num);
-
- /* RAND_load_file returns a nonnegative number. */
- OPENSSL_EXPORT int RAND_load_file(const char *path, long num);
-
- /* RAND_add does nothing. */
- OPENSSL_EXPORT void RAND_add(const void *buf, int num, double entropy);
-
- /* RAND_egd returns 255. */
- OPENSSL_EXPORT int RAND_egd(const char *);
-
- /* RAND_poll returns one. */
- OPENSSL_EXPORT int RAND_poll(void);
-
- /* RAND_status returns one. */
- OPENSSL_EXPORT int RAND_status(void);
-
- /* rand_meth_st is typedefed to |RAND_METHOD| in base.h. It isn't used; it
- * exists only to be the return type of |RAND_SSLeay|. It's
- * external so that variables of this type can be initialized. */
- struct rand_meth_st {
- void (*seed) (const void *buf, int num);
- int (*bytes) (uint8_t *buf, size_t num);
- void (*cleanup) (void);
- void (*add) (const void *buf, int num, double entropy);
- int (*pseudorand) (uint8_t *buf, size_t num);
- int (*status) (void);
- };
-
- /* RAND_SSLeay returns a pointer to a dummy |RAND_METHOD|. */
- OPENSSL_EXPORT RAND_METHOD *RAND_SSLeay(void);
-
- /* RAND_set_rand_method does nothing. */
- OPENSSL_EXPORT void RAND_set_rand_method(const RAND_METHOD *);
-
-
- #if defined(__cplusplus)
- } /* extern C */
- #endif
-
- #endif /* OPENSSL_HEADER_RAND_H */
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