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- /* 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/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) __attribute__((const));
- // 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
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