C++ (Cpp) CRYPTO_rdrand_multiple8_buf示例

示例#1

文件： rand.c 项目： 0x64616E69656C/boringssl

static int hwrand(uint8_t *buf, const size_t len) {
  if (!have_rdrand()) {
    return 0;
  }

  const size_t len_multiple8 = len & ~7;
  if (!CRYPTO_rdrand_multiple8_buf(buf, len_multiple8)) {
    return 0;
  }
  const size_t remainder = len - len_multiple8;

  if (remainder != 0) {
    assert(remainder < 8);

    uint8_t rand_buf[8];
    if (!CRYPTO_rdrand(rand_buf)) {
      return 0;
    }
    OPENSSL_memcpy(buf + len_multiple8, rand_buf, remainder);
  }

#if defined(BORINGSSL_FIPS_BREAK_CRNG)
  // This breaks the "continuous random number generator test" defined in FIPS
  // 140-2, section 4.9.2, and implemented in rand_get_seed().
  OPENSSL_memset(buf, 0, len);
#endif

  return 1;
}

示例#2

文件： hwrand.c 项目： krunalsoni01/src

int CRYPTO_hwrand(uint8_t *buf, size_t len) {
  const size_t len_multiple8 = len & ~7;
  if (!CRYPTO_rdrand_multiple8_buf(buf, len_multiple8)) {
    return 0;
  }
  len -= len_multiple8;

  if (len != 0) {
    assert(len < 8);

    uint8_t rand_buf[8];
    if (!CRYPTO_rdrand(rand_buf)) {
      return 0;
    }
    memcpy(buf + len_multiple8, rand_buf, len);
  }

  return 1;
}