text: /* Copyright (c) 2017, 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_FIPSMODULE_DELOCATE_H
  #define OPENSSL_HEADER_FIPSMODULE_DELOCATE_H
  
  #include <openssl_grpc/base.h>
  
  #include "../internal.h"
  
  
  #if defined(BORINGSSL_FIPS) && !defined(OPENSSL_ASAN) && !defined(OPENSSL_MSAN)
  #define DEFINE_BSS_GET(type, name)        \
    static type name __attribute__((used)); \
    type *name##_bss_get(void);
  // For FIPS builds we require that CRYPTO_ONCE_INIT be zero.
  #define DEFINE_STATIC_ONCE(name) DEFINE_BSS_GET(CRYPTO_once_t, name)
  // For FIPS builds we require that CRYPTO_STATIC_MUTEX_INIT be zero.
  #define DEFINE_STATIC_MUTEX(name) \
    DEFINE_BSS_GET(struct CRYPTO_STATIC_MUTEX, name)
  // For FIPS builds we require that CRYPTO_EX_DATA_CLASS_INIT be zero.
  #define DEFINE_STATIC_EX_DATA_CLASS(name) \
    DEFINE_BSS_GET(CRYPTO_EX_DATA_CLASS, name)
  #else
  #define DEFINE_BSS_GET(type, name) \
    static type name;                \
    static type *name##_bss_get(void) { return &name; }
  #define DEFINE_STATIC_ONCE(name)                \
    static CRYPTO_once_t name = CRYPTO_ONCE_INIT; \
    static CRYPTO_once_t *name##_bss_get(void) { return &name; }
  #define DEFINE_STATIC_MUTEX(name)                                    \
    static struct CRYPTO_STATIC_MUTEX name = CRYPTO_STATIC_MUTEX_INIT; \
    static struct CRYPTO_STATIC_MUTEX *name##_bss_get(void) { return &name; }
  #define DEFINE_STATIC_EX_DATA_CLASS(name)                       \
    static CRYPTO_EX_DATA_CLASS name = CRYPTO_EX_DATA_CLASS_INIT; \
    static CRYPTO_EX_DATA_CLASS *name##_bss_get(void) { return &name; }
  #endif
  
  #define DEFINE_DATA(type, name, accessor_decorations)                         \
    DEFINE_BSS_GET(type, name##_storage)                                        \
    DEFINE_STATIC_ONCE(name##_once)                                             \
    static void name##_do_init(type *out);                                      \
    static void name##_init(void) { name##_do_init(name##_storage_bss_get()); } \
    accessor_decorations type *name(void) {                                     \
      CRYPTO_once(name##_once_bss_get(), name##_init);                          \
      /* See http://c-faq.com/ansi/constmismatch.html for why the following     \
       * cast is needed. */                                                     \
      return (const type *)name##_storage_bss_get();                            \
    }                                                                           \
    static void name##_do_init(type *out)
  
  // DEFINE_METHOD_FUNCTION defines a function named |name| which returns a
  // method table of type const |type|*. In FIPS mode, to avoid rel.ro data, it
  // is split into a CRYPTO_once_t-guarded initializer in the module and
  // unhashed, non-module accessor functions to space reserved in the BSS. The
  // method table is initialized by a caller-supplied function which takes a
  // parameter named |out| of type |type|*. The caller should follow the macro
  // invocation with the body of this function:
  //
  //     DEFINE_METHOD_FUNCTION(EVP_MD, EVP_md4) {
  //       out->type = NID_md4;
  //       out->md_size = MD4_DIGEST_LENGTH;
  //       out->flags = 0;
  //       out->init = md4_init;
  //       out->update = md4_update;
  //       out->final = md4_final;
  //       out->block_size = 64;
  //       out->ctx_size = sizeof(MD4_CTX);
  //     }
  //
  // This mechanism does not use a static initializer because their execution
  // order is undefined. See FIPS.md for more details.
  #define DEFINE_METHOD_FUNCTION(type, name) DEFINE_DATA(type, name, const)
  
  #define DEFINE_LOCAL_DATA(type, name) DEFINE_DATA(type, name, static const)
  
  #endif  // OPENSSL_HEADER_FIPSMODULE_DELOCATE_H
  