/* Copyright (c) 2015, 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_CRYPTO_RAND_INTERNAL_H

#define OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H

#include <openssl/aes.h>

#include <openssl/ctrdrbg.h>

#include "../../bcm_support.h"

#include "../modes/internal.h"

#if defined(__cplusplus)

extern "C" {

#endif

// rand_fork_unsafe_buffering_enabled returns whether fork-unsafe buffering has

// been enabled via |RAND_enable_fork_unsafe_buffering|.

int rand_fork_unsafe_buffering_enabled(void);

// CTR_DRBG_STATE contains the state of a CTR_DRBG based on AES-256. See SP

// 800-90Ar1.

struct ctr_drbg_state_st {

  AES_KEY ks;

  block128_f block;

  ctr128_f ctr;

  uint8_t counter[16];

  uint64_t reseed_counter;

};

// CTR_DRBG_init initialises |*drbg| given |CTR_DRBG_ENTROPY_LEN| bytes of

// entropy in |entropy| and, optionally, a personalization string up to

// |CTR_DRBG_ENTROPY_LEN| bytes in length. It returns one on success and zero

// on error.

OPENSSL_EXPORT int CTR_DRBG_init(CTR_DRBG_STATE *drbg,

                                 const uint8_t entropy[CTR_DRBG_ENTROPY_LEN],

                                 const uint8_t *personalization,

                                 size_t personalization_len);

#if defined(OPENSSL_X86_64) && !defined(OPENSSL_NO_ASM)

OPENSSL_INLINE int have_rdrand(void) {

  return CRYPTO_is_RDRAND_capable();

}

// have_fast_rdrand returns true if RDRAND is supported and it's reasonably

// fast. Concretely the latter is defined by whether the chip is Intel (fast) or

// not (assumed slow).

OPENSSL_INLINE int have_fast_rdrand(void) {

  return CRYPTO_is_RDRAND_capable() && CRYPTO_is_intel_cpu();

}

// CRYPTO_rdrand writes eight bytes of random data from the hardware RNG to

// |out|. It returns one on success or zero on hardware failure.

int CRYPTO_rdrand(uint8_t out[8]);

// CRYPTO_rdrand_multiple8_buf fills |len| bytes at |buf| with random data from

// the hardware RNG. The |len| argument must be a multiple of eight. It returns

// one on success and zero on hardware failure.

int CRYPTO_rdrand_multiple8_buf(uint8_t *buf, size_t len);

#else  // OPENSSL_X86_64 && !OPENSSL_NO_ASM

OPENSSL_INLINE int have_rdrand(void) {

  return 0;

}

Unexecuted instantiation: bcm.c:have_rdrand

Unexecuted instantiation: crypto.c:have_rdrand

Unexecuted instantiation: forkunsafe.c:have_rdrand

OPENSSL_INLINE int have_fast_rdrand(void) {

  return 0;

}

bcm.c:have_fast_rdrand

Line

Count

Source

79

3.32k

OPENSSL_INLINE int have_fast_rdrand(void) {

80

3.32k

  return 0;

81

3.32k

}

Unexecuted instantiation: crypto.c:have_fast_rdrand

Unexecuted instantiation: forkunsafe.c:have_fast_rdrand

#endif  // OPENSSL_X86_64 && !OPENSSL_NO_ASM

#if defined(__cplusplus)

}  // extern C

#endif

#endif  // OPENSSL_HEADER_CRYPTO_RAND_INTERNAL_H