// Copyright 2014 The BoringSSL Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

#include <openssl/crypto.h>

#include <assert.h>

#include <stdio.h>

#include "bcm_support.h"

#include "fipsmodule/rand/internal.h"

#include "internal.h"

using namespace bssl;

static_assert(sizeof(ossl_ssize_t) == sizeof(size_t),

              "ossl_ssize_t should be the same size as size_t");

// Our assembly does not use the GOT to reference symbols, which means

// references to visible symbols will often require a TEXTREL. This is

// undesirable, so all assembly-referenced symbols should be hidden. CPU

// capabilities are the only such symbols defined in C. Explicitly hide them,

// rather than rely on being built with -fvisibility=hidden.

#if defined(OPENSSL_WINDOWS)

#define HIDDEN

#else

#define HIDDEN __attribute__((visibility("hidden")))

#endif

// The capability variables are defined in this file in order to work around a

// linker bug. When linking with a .a, if no symbols in a .o are referenced

// then the .o is discarded, even if it has constructor functions.

//

// This still means that any binaries that don't include some functionality

// that tests the capability values will still skip the constructor but, so

// far, the init constructor function only sets the capability variables.

#if defined(BORINGSSL_DISPATCH_TEST)

// This value must be explicitly initialised to zero in order to work around a

// bug in libtool or the linker on OS X.

//

// If not initialised then it becomes a "common symbol". When put into an

// archive, linking on OS X will fail to resolve common symbols. By

// initialising it to zero, it becomes a "data symbol", which isn't so

// affected.

HIDDEN uint8_t bssl::BORINGSSL_function_hit[8] = {0};

#endif

#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)

// This value must be explicitly initialized to zero. See similar comment above.

HIDDEN uint32_t bssl::OPENSSL_ia32cap_P[4] = {0};

uint32_t bssl::OPENSSL_get_ia32cap(int idx) {

  OPENSSL_init_cpuid();

  return OPENSSL_ia32cap_P[idx];

}

#elif (defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)) && \

    !defined(OPENSSL_STATIC_ARMCAP)

HIDDEN uint32_t bssl::OPENSSL_armcap_P = 0;

uint32_t *bssl::OPENSSL_get_armcap_pointer_for_test() {

  OPENSSL_init_cpuid();

  return &OPENSSL_armcap_P;

}

uint32_t bssl::OPENSSL_get_armcap() {

  OPENSSL_init_cpuid();

  return OPENSSL_armcap_P;

}

#endif

#if defined(NEED_CPUID)

static bssl::CRYPTO_once_t once = CRYPTO_ONCE_INIT;

void bssl::OPENSSL_init_cpuid() { CRYPTO_once(&once, OPENSSL_cpuid_setup); }

#endif

void CRYPTO_library_init() {}

int CRYPTO_is_confidential_build() {

#if defined(BORINGSSL_CONFIDENTIAL)

  return 1;

#else

  return 0;

#endif

}

void CRYPTO_pre_sandbox_init() {

  // Read from /proc/cpuinfo if needed.

  OPENSSL_init_cpuid();

  // Open /dev/urandom if needed.

  CRYPTO_init_sysrand();

  // Set up MADV_WIPEONFORK state if needed.

  CRYPTO_get_fork_generation();

}

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

const char *OpenSSL_version(int which) {

  switch (which) {

    case OPENSSL_VERSION:

      return "BoringSSL";

    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() { return OPENSSL_VERSION_NUMBER; }

unsigned long OpenSSL_version_num() { return OPENSSL_VERSION_NUMBER; }

int CRYPTO_malloc_init() { return 1; }

int OPENSSL_malloc_init() { return 1; }

void ENGINE_load_builtin_engines() {}

int ENGINE_register_all_complete() { return 1; }

void ENGINE_cleanup() {}

void OPENSSL_load_builtin_modules() {}

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

  return 1;

}

void OPENSSL_cleanup() {}

FILE *bssl::CRYPTO_get_stderr() { return stderr; }