/* 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. */

#include <openssl/crypto.h>

#include <openssl/rand.h>

#include <assert.h>

#include "fipsmodule/cpucap/internal.h"

#include "internal.h"

OPENSSL_STATIC_ASSERT(sizeof(ossl_ssize_t) == sizeof(size_t),

              ossl_ssize_t_should_be_the_same_size_as_size_t)

#if !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_STATIC_ARMCAP) && \

    (defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || \

     defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64) || \

     defined(OPENSSL_PPC64LE))

// x86, x86_64, the ARMs and ppc64le need to record the result of a

// cpuid/getauxval call for the asm to work correctly, unless compiled without

// asm code.

#define NEED_CPUID

#else

// Otherwise, don't emit a static initialiser.

#if !defined(BORINGSSL_NO_STATIC_INITIALIZER)

#define BORINGSSL_NO_STATIC_INITIALIZER

#endif

#endif  // !NO_ASM && !STATIC_ARMCAP &&

        // (X86 || X86_64 || ARM || AARCH64 || PPC64LE)

#if defined(BORINGSSL_FIPS)

// In FIPS mode, the power-on self-test function calls |OPENSSL_cpuid_setup|

// because we have to ensure that CPUID detection occurs first.

#define BORINGSSL_NO_STATIC_INITIALIZER

#endif

#if defined(OPENSSL_WINDOWS) && !defined(BORINGSSL_NO_STATIC_INITIALIZER)

#define OPENSSL_CDECL __cdecl

#else

#define OPENSSL_CDECL

#endif

#if defined(BORINGSSL_NO_STATIC_INITIALIZER)

static CRYPTO_once_t once = CRYPTO_ONCE_INIT;

#elif defined(_MSC_VER)

#pragma section(".CRT$XCU", read)

static void __cdecl do_library_init(void);

__declspec(allocate(".CRT$XCU")) void(*library_init_constructor)(void) =

    do_library_init;

#else

static void do_library_init(void) __attribute__ ((constructor));

#endif

// do_library_init is the actual initialization function. If

// BORINGSSL_NO_STATIC_INITIALIZER isn't defined, this is set as a static

// initializer. Otherwise, it is called by CRYPTO_library_init.

static void OPENSSL_CDECL do_library_init(void) {

 // WARNING: this function may only configure the capability variables. See the

 // note above about the linker bug.

 // In the FIPS build the module itself has to call |OPENSSL_cpuid_setup|.

#if defined(NEED_CPUID) && !defined(BORINGSSL_FIPS)

  OPENSSL_cpuid_setup();

#endif

}

void CRYPTO_library_init(void) {

  // TODO(davidben): It would be tidier if this build knob could be replaced

  // with an internal lazy-init mechanism that would handle things correctly

  // in-library. https://crbug.com/542879

#if defined(BORINGSSL_NO_STATIC_INITIALIZER)

  CRYPTO_once(&once, do_library_init);

#endif

}

int CRYPTO_is_confidential_build(void) {

#if defined(BORINGSSL_CONFIDENTIAL)

  return 1;

#else

  return 0;

#endif

}

int CRYPTO_has_asm(void) {

#if defined(OPENSSL_NO_ASM)

  return 0;

#else

  return 1;

#endif

}

void CRYPTO_pre_sandbox_init(void) {

  // Read from /proc/cpuinfo if needed.

  CRYPTO_library_init();

  // The randomness generation subsystem has a few kernel touch points that

  // can be blocked when sandboxed. For example, /dev/urandom, MADV_WIPEONFORK

  // tagged state, and snapsafe allocated state. All this is implemented lazily.

  // Invoke the top-level function that will kick off the lazy work pre-sandbox.

  uint8_t buf[10];

  if (RAND_bytes(buf, 10) != 1) {

    abort();

  }

}

const char *SSLeay_version(int which) { return OpenSSL_version(which); }

const char *OpenSSL_version(int which) {

  switch (which) {

    case OPENSSL_VERSION:

      return AWSLC_VERSION_STRING;

    case OPENSSL_CFLAGS:

      return "compiler: n/a";

    case OPENSSL_BUILT_ON:

      return "built on: n/a";

    case OPENSSL_PLATFORM:

      return "platform: n/a";

    case OPENSSL_DIR:

      return "OPENSSLDIR: n/a";

    default:

      return "not available";

  }

}

unsigned long SSLeay(void) { return OPENSSL_VERSION_NUMBER; }

unsigned long OpenSSL_version_num(void) { return OPENSSL_VERSION_NUMBER; }

unsigned long awslc_api_version_num(void) { return AWSLC_API_VERSION; }

int CRYPTO_malloc_init(void) { return 1; }

int OPENSSL_malloc_init(void) { return 1; }

void ENGINE_load_builtin_engines(void) {}

int ENGINE_register_all_complete(void) { return 1; }

void OPENSSL_load_builtin_modules(void) {}

int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings) {

  CRYPTO_library_init();

  return 1;

}

void OPENSSL_init(void) {}

void OPENSSL_cleanup(void) {}