--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com). */
+
+#ifndef OPENSSL_HEADER_CRYPTO_INTERNAL_H
+#define OPENSSL_HEADER_CRYPTO_INTERNAL_H
+
+#include <openssl/ex_data.h>
+#include <openssl/stack.h>
+#include <openssl/thread.h>
+
+#include <assert.h>
+#include <string.h>
+
+#if defined(__GNUC__) && \
+ (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40800
+// |alignas| and |alignof| were added in C11. GCC added support in version 4.8.
+// Testing for __STDC_VERSION__/__cplusplus doesn't work because 4.7 already
+// reports support for C11.
+#define alignas(x) __attribute__ ((aligned (x)))
+#define alignof(x) __alignof__ (x)
+#elif !defined(__cplusplus)
+#if defined(_MSC_VER)
+#define alignas(x) __declspec(align(x))
+#define alignof __alignof
+#else
+#include <stdalign.h>
+#endif
+#endif
+
+#if !defined(OPENSSL_NO_THREADS) && \
+ (!defined(OPENSSL_WINDOWS) || defined(__MINGW32__))
+#include <pthread.h>
+#define OPENSSL_PTHREADS
+#endif
+
+#if !defined(OPENSSL_NO_THREADS) && !defined(OPENSSL_PTHREADS) && \
+ defined(OPENSSL_WINDOWS)
+#define OPENSSL_WINDOWS_THREADS
+OPENSSL_MSVC_PRAGMA(warning(push, 3))
+#include <windows.h>
+OPENSSL_MSVC_PRAGMA(warning(pop))
+#endif
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64) || defined(OPENSSL_ARM) || \
+ defined(OPENSSL_AARCH64) || defined(OPENSSL_PPC64LE)
+// OPENSSL_cpuid_setup initializes the platform-specific feature cache.
+void OPENSSL_cpuid_setup(void);
+#endif
+
+
+#if (!defined(_MSC_VER) || defined(__clang__)) && defined(OPENSSL_64_BIT)
+#define BORINGSSL_HAS_UINT128
+typedef __int128_t int128_t;
+typedef __uint128_t uint128_t;
+
+// clang-cl supports __uint128_t but modulus and division don't work.
+// https://crbug.com/787617.
+#if !defined(_MSC_VER) || !defined(__clang__)
+#define BORINGSSL_CAN_DIVIDE_UINT128
+#endif
+#endif
+
+#define OPENSSL_ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+
+// Have a generic fall-through for different versions of C/C++.
+#if defined(__cplusplus) && __cplusplus >= 201703L
+#define OPENSSL_FALLTHROUGH [[fallthrough]]
+#elif defined(__cplusplus) && __cplusplus >= 201103L && defined(__clang__)
+#define OPENSSL_FALLTHROUGH [[clang::fallthrough]]
+#elif defined(__cplusplus) && __cplusplus >= 201103L && defined(__GNUC__) && \
+ __GNUC__ >= 7
+#define OPENSSL_FALLTHROUGH [[gnu::fallthrough]]
+#elif defined(__GNUC__) && __GNUC__ >= 7 // gcc 7
+#define OPENSSL_FALLTHROUGH __attribute__ ((fallthrough))
+#else // C++11 on gcc 6, and all other cases
+#define OPENSSL_FALLTHROUGH
+#endif
+
+// buffers_alias returns one if |a| and |b| alias and zero otherwise.
+static inline int buffers_alias(const uint8_t *a, size_t a_len,
+ const uint8_t *b, size_t b_len) {
+ // Cast |a| and |b| to integers. In C, pointer comparisons between unrelated
+ // objects are undefined whereas pointer to integer conversions are merely
+ // implementation-defined. We assume the implementation defined it in a sane
+ // way.
+ uintptr_t a_u = (uintptr_t)a;
+ uintptr_t b_u = (uintptr_t)b;
+ return a_u + a_len > b_u && b_u + b_len > a_u;
+}
+
+
+// Constant-time utility functions.
+//
+// The following methods return a bitmask of all ones (0xff...f) for true and 0
+// for false. This is useful for choosing a value based on the result of a
+// conditional in constant time. For example,
+//
+// if (a < b) {
+// c = a;
+// } else {
+// c = b;
+// }
+//
+// can be written as
+//
+// crypto_word_t lt = constant_time_lt_w(a, b);
+// c = constant_time_select_w(lt, a, b);
+
+// crypto_word_t is the type that most constant-time functions use. Ideally we
+// would like it to be |size_t|, but NaCl builds in 64-bit mode with 32-bit
+// pointers, which means that |size_t| can be 32 bits when |BN_ULONG| is 64
+// bits. Since we want to be able to do constant-time operations on a
+// |BN_ULONG|, |crypto_word_t| is defined as an unsigned value with the native
+// word length.
+#if defined(OPENSSL_64_BIT)
+typedef uint64_t crypto_word_t;
+#elif defined(OPENSSL_32_BIT)
+typedef uint32_t crypto_word_t;
+#else
+#error "Must define either OPENSSL_32_BIT or OPENSSL_64_BIT"
+#endif
+
+#define CONSTTIME_TRUE_W ~((crypto_word_t)0)
+#define CONSTTIME_FALSE_W ((crypto_word_t)0)
+#define CONSTTIME_TRUE_8 ((uint8_t)0xff)
+
+#define CONSTTIME_TRUE_W ~((crypto_word_t)0)
+#define CONSTTIME_FALSE_W ((crypto_word_t)0)
+#define CONSTTIME_TRUE_8 ((uint8_t)0xff)
+#define CONSTTIME_FALSE_8 ((uint8_t)0)
+
+// constant_time_msb_w returns the given value with the MSB copied to all the
+// other bits.
+static inline crypto_word_t constant_time_msb_w(crypto_word_t a) {
+ return 0u - (a >> (sizeof(a) * 8 - 1));
+}
+
+// constant_time_lt_w returns 0xff..f if a < b and 0 otherwise.
+static inline crypto_word_t constant_time_lt_w(crypto_word_t a,
+ crypto_word_t b) {
+ // Consider the two cases of the problem:
+ // msb(a) == msb(b): a < b iff the MSB of a - b is set.
+ // msb(a) != msb(b): a < b iff the MSB of b is set.
+ //
+ // If msb(a) == msb(b) then the following evaluates as:
+ // msb(a^((a^b)|((a-b)^a))) ==
+ // msb(a^((a-b) ^ a)) == (because msb(a^b) == 0)
+ // msb(a^a^(a-b)) == (rearranging)
+ // msb(a-b) (because ∀x. x^x == 0)
+ //
+ // Else, if msb(a) != msb(b) then the following evaluates as:
+ // msb(a^((a^b)|((a-b)^a))) ==
+ // msb(a^(𝟙 | ((a-b)^a))) == (because msb(a^b) == 1 and 𝟙
+ // represents a value s.t. msb(𝟙) = 1)
+ // msb(a^𝟙) == (because ORing with 1 results in 1)
+ // msb(b)
+ //
+ //
+ // Here is an SMT-LIB verification of this formula:
+ //
+ // (define-fun lt ((a (_ BitVec 32)) (b (_ BitVec 32))) (_ BitVec 32)
+ // (bvxor a (bvor (bvxor a b) (bvxor (bvsub a b) a)))
+ // )
+ //
+ // (declare-fun a () (_ BitVec 32))
+ // (declare-fun b () (_ BitVec 32))
+ //
+ // (assert (not (= (= #x00000001 (bvlshr (lt a b) #x0000001f)) (bvult a b))))
+ // (check-sat)
+ // (get-model)
+ return constant_time_msb_w(a^((a^b)|((a-b)^a)));
+}
+
+// constant_time_lt_8 acts like |constant_time_lt_w| but returns an 8-bit
+// mask.
+static inline uint8_t constant_time_lt_8(crypto_word_t a, crypto_word_t b) {
+ return (uint8_t)(constant_time_lt_w(a, b));
+}
+
+// constant_time_ge_w returns 0xff..f if a >= b and 0 otherwise.
+static inline crypto_word_t constant_time_ge_w(crypto_word_t a,
+ crypto_word_t b) {
+ return ~constant_time_lt_w(a, b);
+}
+
+// constant_time_ge_8 acts like |constant_time_ge_w| but returns an 8-bit
+// mask.
+static inline uint8_t constant_time_ge_8(crypto_word_t a, crypto_word_t b) {
+ return (uint8_t)(constant_time_ge_w(a, b));
+}
+
+// constant_time_is_zero returns 0xff..f if a == 0 and 0 otherwise.
+static inline crypto_word_t constant_time_is_zero_w(crypto_word_t a) {
+ // Here is an SMT-LIB verification of this formula:
+ //
+ // (define-fun is_zero ((a (_ BitVec 32))) (_ BitVec 32)
+ // (bvand (bvnot a) (bvsub a #x00000001))
+ // )
+ //
+ // (declare-fun a () (_ BitVec 32))
+ //
+ // (assert (not (= (= #x00000001 (bvlshr (is_zero a) #x0000001f)) (= a #x00000000))))
+ // (check-sat)
+ // (get-model)
+ return constant_time_msb_w(~a & (a - 1));
+}
+
+// constant_time_is_zero_8 acts like |constant_time_is_zero_w| but returns an
+// 8-bit mask.
+static inline uint8_t constant_time_is_zero_8(crypto_word_t a) {
+ return (uint8_t)(constant_time_is_zero_w(a));
+}
+
+// constant_time_eq_w returns 0xff..f if a == b and 0 otherwise.
+static inline crypto_word_t constant_time_eq_w(crypto_word_t a,
+ crypto_word_t b) {
+ return constant_time_is_zero_w(a ^ b);
+}
+
+// constant_time_eq_8 acts like |constant_time_eq_w| but returns an 8-bit
+// mask.
+static inline uint8_t constant_time_eq_8(crypto_word_t a, crypto_word_t b) {
+ return (uint8_t)(constant_time_eq_w(a, b));
+}
+
+// constant_time_eq_int acts like |constant_time_eq_w| but works on int
+// values.
+static inline crypto_word_t constant_time_eq_int(int a, int b) {
+ return constant_time_eq_w((crypto_word_t)(a), (crypto_word_t)(b));
+}
+
+// constant_time_eq_int_8 acts like |constant_time_eq_int| but returns an 8-bit
+// mask.
+static inline uint8_t constant_time_eq_int_8(int a, int b) {
+ return constant_time_eq_8((crypto_word_t)(a), (crypto_word_t)(b));
+}
+
+// constant_time_select_w returns (mask & a) | (~mask & b). When |mask| is all
+// 1s or all 0s (as returned by the methods above), the select methods return
+// either |a| (if |mask| is nonzero) or |b| (if |mask| is zero).
+static inline crypto_word_t constant_time_select_w(crypto_word_t mask,
+ crypto_word_t a,
+ crypto_word_t b) {
+ return (mask & a) | (~mask & b);
+}
+
+// constant_time_select_8 acts like |constant_time_select| but operates on
+// 8-bit values.
+static inline uint8_t constant_time_select_8(uint8_t mask, uint8_t a,
+ uint8_t b) {
+ return (uint8_t)(constant_time_select_w(mask, a, b));
+}
+
+// constant_time_select_int acts like |constant_time_select| but operates on
+// ints.
+static inline int constant_time_select_int(crypto_word_t mask, int a, int b) {
+ return (int)(constant_time_select_w(mask, (crypto_word_t)(a),
+ (crypto_word_t)(b)));
+}
+
+
+// Thread-safe initialisation.
+
+#if defined(OPENSSL_NO_THREADS)
+typedef uint32_t CRYPTO_once_t;
+#define CRYPTO_ONCE_INIT 0
+#elif defined(OPENSSL_WINDOWS_THREADS)
+typedef INIT_ONCE CRYPTO_once_t;
+#define CRYPTO_ONCE_INIT INIT_ONCE_STATIC_INIT
+#elif defined(OPENSSL_PTHREADS)
+typedef pthread_once_t CRYPTO_once_t;
+#define CRYPTO_ONCE_INIT PTHREAD_ONCE_INIT
+#else
+#error "Unknown threading library"
+#endif
+
+// CRYPTO_once calls |init| exactly once per process. This is thread-safe: if
+// concurrent threads call |CRYPTO_once| with the same |CRYPTO_once_t| argument
+// then they will block until |init| completes, but |init| will have only been
+// called once.
+//
+// The |once| argument must be a |CRYPTO_once_t| that has been initialised with
+// the value |CRYPTO_ONCE_INIT|.
+OPENSSL_EXPORT void CRYPTO_once(CRYPTO_once_t *once, void (*init)(void));
+
+
+// Reference counting.
+
+// CRYPTO_REFCOUNT_MAX is the value at which the reference count saturates.
+#define CRYPTO_REFCOUNT_MAX 0xffffffff
+
+// CRYPTO_refcount_inc atomically increments the value at |*count| unless the
+// value would overflow. It's safe for multiple threads to concurrently call
+// this or |CRYPTO_refcount_dec_and_test_zero| on the same
+// |CRYPTO_refcount_t|.
+OPENSSL_EXPORT void CRYPTO_refcount_inc(CRYPTO_refcount_t *count);
+
+// CRYPTO_refcount_dec_and_test_zero tests the value at |*count|:
+// if it's zero, it crashes the address space.
+// if it's the maximum value, it returns zero.
+// otherwise, it atomically decrements it and returns one iff the resulting
+// value is zero.
+//
+// It's safe for multiple threads to concurrently call this or
+// |CRYPTO_refcount_inc| on the same |CRYPTO_refcount_t|.
+OPENSSL_EXPORT int CRYPTO_refcount_dec_and_test_zero(CRYPTO_refcount_t *count);
+
+
+// Locks.
+//
+// Two types of locks are defined: |CRYPTO_MUTEX|, which can be used in
+// structures as normal, and |struct CRYPTO_STATIC_MUTEX|, which can be used as
+// a global lock. A global lock must be initialised to the value
+// |CRYPTO_STATIC_MUTEX_INIT|.
+//
+// |CRYPTO_MUTEX| can appear in public structures and so is defined in
+// thread.h as a structure large enough to fit the real type. The global lock is
+// a different type so it may be initialized with platform initializer macros.
+
+#if defined(OPENSSL_NO_THREADS)
+struct CRYPTO_STATIC_MUTEX {
+ char padding; // Empty structs have different sizes in C and C++.
+};
+#define CRYPTO_STATIC_MUTEX_INIT { 0 }
+#elif defined(OPENSSL_WINDOWS_THREADS)
+struct CRYPTO_STATIC_MUTEX {
+ SRWLOCK lock;
+};
+#define CRYPTO_STATIC_MUTEX_INIT { SRWLOCK_INIT }
+#elif defined(OPENSSL_PTHREADS)
+struct CRYPTO_STATIC_MUTEX {
+ pthread_rwlock_t lock;
+};
+#define CRYPTO_STATIC_MUTEX_INIT { PTHREAD_RWLOCK_INITIALIZER }
+#else
+#error "Unknown threading library"
+#endif
+
+// CRYPTO_MUTEX_init initialises |lock|. If |lock| is a static variable, use a
+// |CRYPTO_STATIC_MUTEX|.
+OPENSSL_EXPORT void CRYPTO_MUTEX_init(CRYPTO_MUTEX *lock);
+
+// CRYPTO_MUTEX_lock_read locks |lock| such that other threads may also have a
+// read lock, but none may have a write lock.
+OPENSSL_EXPORT void CRYPTO_MUTEX_lock_read(CRYPTO_MUTEX *lock);
+
+// CRYPTO_MUTEX_lock_write locks |lock| such that no other thread has any type
+// of lock on it.
+OPENSSL_EXPORT void CRYPTO_MUTEX_lock_write(CRYPTO_MUTEX *lock);
+
+// CRYPTO_MUTEX_unlock_read unlocks |lock| for reading.
+OPENSSL_EXPORT void CRYPTO_MUTEX_unlock_read(CRYPTO_MUTEX *lock);
+
+// CRYPTO_MUTEX_unlock_write unlocks |lock| for writing.
+OPENSSL_EXPORT void CRYPTO_MUTEX_unlock_write(CRYPTO_MUTEX *lock);
+
+// CRYPTO_MUTEX_cleanup releases all resources held by |lock|.
+OPENSSL_EXPORT void CRYPTO_MUTEX_cleanup(CRYPTO_MUTEX *lock);
+
+// CRYPTO_STATIC_MUTEX_lock_read locks |lock| such that other threads may also
+// have a read lock, but none may have a write lock. The |lock| variable does
+// not need to be initialised by any function, but must have been statically
+// initialised with |CRYPTO_STATIC_MUTEX_INIT|.
+OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_lock_read(
+ struct CRYPTO_STATIC_MUTEX *lock);
+
+// CRYPTO_STATIC_MUTEX_lock_write locks |lock| such that no other thread has
+// any type of lock on it. The |lock| variable does not need to be initialised
+// by any function, but must have been statically initialised with
+// |CRYPTO_STATIC_MUTEX_INIT|.
+OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_lock_write(
+ struct CRYPTO_STATIC_MUTEX *lock);
+
+// CRYPTO_STATIC_MUTEX_unlock_read unlocks |lock| for reading.
+OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_unlock_read(
+ struct CRYPTO_STATIC_MUTEX *lock);
+
+// CRYPTO_STATIC_MUTEX_unlock_write unlocks |lock| for writing.
+OPENSSL_EXPORT void CRYPTO_STATIC_MUTEX_unlock_write(
+ struct CRYPTO_STATIC_MUTEX *lock);
+
+#if defined(__cplusplus)
+extern "C++" {
+
+namespace bssl {
+
+namespace internal {
+
+// MutexLockBase is a RAII helper for CRYPTO_MUTEX locking.
+template <void (*LockFunc)(CRYPTO_MUTEX *), void (*ReleaseFunc)(CRYPTO_MUTEX *)>
+class MutexLockBase {
+ public:
+ explicit MutexLockBase(CRYPTO_MUTEX *mu) : mu_(mu) {
+ assert(mu_ != nullptr);
+ LockFunc(mu_);
+ }
+ ~MutexLockBase() { ReleaseFunc(mu_); }
+ MutexLockBase(const MutexLockBase<LockFunc, ReleaseFunc> &) = delete;
+ MutexLockBase &operator=(const MutexLockBase<LockFunc, ReleaseFunc> &) =
+ delete;
+
+ private:
+ CRYPTO_MUTEX *const mu_;
+};
+
+} // namespace internal
+
+using MutexWriteLock =
+ internal::MutexLockBase<CRYPTO_MUTEX_lock_write, CRYPTO_MUTEX_unlock_write>;
+using MutexReadLock =
+ internal::MutexLockBase<CRYPTO_MUTEX_lock_read, CRYPTO_MUTEX_unlock_read>;
+
+} // namespace bssl
+
+} // extern "C++"
+#endif // defined(__cplusplus)
+
+
+// Thread local storage.
+
+// thread_local_data_t enumerates the types of thread-local data that can be
+// stored.
+typedef enum {
+ OPENSSL_THREAD_LOCAL_ERR = 0,
+ OPENSSL_THREAD_LOCAL_RAND,
+ OPENSSL_THREAD_LOCAL_TEST,
+ NUM_OPENSSL_THREAD_LOCALS,
+} thread_local_data_t;
+
+// thread_local_destructor_t is the type of a destructor function that will be
+// called when a thread exits and its thread-local storage needs to be freed.
+typedef void (*thread_local_destructor_t)(void *);
+
+// CRYPTO_get_thread_local gets the pointer value that is stored for the
+// current thread for the given index, or NULL if none has been set.
+OPENSSL_EXPORT void *CRYPTO_get_thread_local(thread_local_data_t value);
+
+// CRYPTO_set_thread_local sets a pointer value for the current thread at the
+// given index. This function should only be called once per thread for a given
+// |index|: rather than update the pointer value itself, update the data that
+// is pointed to.
+//
+// The destructor function will be called when a thread exits to free this
+// thread-local data. All calls to |CRYPTO_set_thread_local| with the same
+// |index| should have the same |destructor| argument. The destructor may be
+// called with a NULL argument if a thread that never set a thread-local
+// pointer for |index|, exits. The destructor may be called concurrently with
+// different arguments.
+//
+// This function returns one on success or zero on error. If it returns zero
+// then |destructor| has been called with |value| already.
+OPENSSL_EXPORT int CRYPTO_set_thread_local(
+ thread_local_data_t index, void *value,
+ thread_local_destructor_t destructor);
+
+
+// ex_data
+
+typedef struct crypto_ex_data_func_st CRYPTO_EX_DATA_FUNCS;
+
+DECLARE_STACK_OF(CRYPTO_EX_DATA_FUNCS)
+
+// CRYPTO_EX_DATA_CLASS tracks the ex_indices registered for a type which
+// supports ex_data. It should defined as a static global within the module
+// which defines that type.
+typedef struct {
+ struct CRYPTO_STATIC_MUTEX lock;
+ STACK_OF(CRYPTO_EX_DATA_FUNCS) *meth;
+ // num_reserved is one if the ex_data index zero is reserved for legacy
+ // |TYPE_get_app_data| functions.
+ uint8_t num_reserved;
+} CRYPTO_EX_DATA_CLASS;
+
+#define CRYPTO_EX_DATA_CLASS_INIT {CRYPTO_STATIC_MUTEX_INIT, NULL, 0}
+#define CRYPTO_EX_DATA_CLASS_INIT_WITH_APP_DATA \
+ {CRYPTO_STATIC_MUTEX_INIT, NULL, 1}
+
+// CRYPTO_get_ex_new_index allocates a new index for |ex_data_class| and writes
+// it to |*out_index|. Each class of object should provide a wrapper function
+// that uses the correct |CRYPTO_EX_DATA_CLASS|. It returns one on success and
+// zero otherwise.
+OPENSSL_EXPORT int CRYPTO_get_ex_new_index(CRYPTO_EX_DATA_CLASS *ex_data_class,
+ int *out_index, long argl,
+ void *argp,
+ CRYPTO_EX_free *free_func);
+
+// CRYPTO_set_ex_data sets an extra data pointer on a given object. Each class
+// of object should provide a wrapper function.
+OPENSSL_EXPORT int CRYPTO_set_ex_data(CRYPTO_EX_DATA *ad, int index, void *val);
+
+// CRYPTO_get_ex_data returns an extra data pointer for a given object, or NULL
+// if no such index exists. Each class of object should provide a wrapper
+// function.
+OPENSSL_EXPORT void *CRYPTO_get_ex_data(const CRYPTO_EX_DATA *ad, int index);
+
+// CRYPTO_new_ex_data initialises a newly allocated |CRYPTO_EX_DATA|.
+OPENSSL_EXPORT void CRYPTO_new_ex_data(CRYPTO_EX_DATA *ad);
+
+// CRYPTO_free_ex_data frees |ad|, which is embedded inside |obj|, which is an
+// object of the given class.
+OPENSSL_EXPORT void CRYPTO_free_ex_data(CRYPTO_EX_DATA_CLASS *ex_data_class,
+ void *obj, CRYPTO_EX_DATA *ad);
+
+
+// Endianness conversions.
+
+#if defined(__GNUC__) && __GNUC__ >= 2
+static inline uint32_t CRYPTO_bswap4(uint32_t x) {
+ return __builtin_bswap32(x);
+}
+
+static inline uint64_t CRYPTO_bswap8(uint64_t x) {
+ return __builtin_bswap64(x);
+}
+#elif defined(_MSC_VER)
+OPENSSL_MSVC_PRAGMA(warning(push, 3))
+#include <intrin.h>
+OPENSSL_MSVC_PRAGMA(warning(pop))
+#pragma intrinsic(_byteswap_uint64, _byteswap_ulong)
+static inline uint32_t CRYPTO_bswap4(uint32_t x) {
+ return _byteswap_ulong(x);
+}
+
+static inline uint64_t CRYPTO_bswap8(uint64_t x) {
+ return _byteswap_uint64(x);
+}
+#else
+static inline uint32_t CRYPTO_bswap4(uint32_t x) {
+ x = (x >> 16) | (x << 16);
+ x = ((x & 0xff00ff00) >> 8) | ((x & 0x00ff00ff) << 8);
+ return x;
+}
+
+static inline uint64_t CRYPTO_bswap8(uint64_t x) {
+ return CRYPTO_bswap4(x >> 32) | (((uint64_t)CRYPTO_bswap4(x)) << 32);
+}
+#endif
+
+
+// Language bug workarounds.
+//
+// Most C standard library functions are undefined if passed NULL, even when the
+// corresponding length is zero. This gives them (and, in turn, all functions
+// which call them) surprising behavior on empty arrays. Some compilers will
+// miscompile code due to this rule. See also
+// https://www.imperialviolet.org/2016/06/26/nonnull.html
+//
+// These wrapper functions behave the same as the corresponding C standard
+// functions, but behave as expected when passed NULL if the length is zero.
+//
+// Note |OPENSSL_memcmp| is a different function from |CRYPTO_memcmp|.
+
+// C++ defines |memchr| as a const-correct overload.
+#if defined(__cplusplus)
+extern "C++" {
+
+static inline const void *OPENSSL_memchr(const void *s, int c, size_t n) {
+ if (n == 0) {
+ return NULL;
+ }
+
+ return memchr(s, c, n);
+}
+
+static inline void *OPENSSL_memchr(void *s, int c, size_t n) {
+ if (n == 0) {
+ return NULL;
+ }
+
+ return memchr(s, c, n);
+}
+
+} // extern "C++"
+#else // __cplusplus
+
+static inline void *OPENSSL_memchr(const void *s, int c, size_t n) {
+ if (n == 0) {
+ return NULL;
+ }
+
+ return memchr(s, c, n);
+}
+
+#endif // __cplusplus
+
+static inline int OPENSSL_memcmp(const void *s1, const void *s2, size_t n) {
+ if (n == 0) {
+ return 0;
+ }
+
+ return memcmp(s1, s2, n);
+}
+
+static inline void *OPENSSL_memcpy(void *dst, const void *src, size_t n) {
+ if (n == 0) {
+ return dst;
+ }
+
+ return memcpy(dst, src, n);
+}
+
+static inline void *OPENSSL_memmove(void *dst, const void *src, size_t n) {
+ if (n == 0) {
+ return dst;
+ }
+
+ return memmove(dst, src, n);
+}
+
+static inline void *OPENSSL_memset(void *dst, int c, size_t n) {
+ if (n == 0) {
+ return dst;
+ }
+
+ return memset(dst, c, n);
+}
+
+#if defined(BORINGSSL_FIPS)
+// BORINGSSL_FIPS_abort is called when a FIPS power-on or continuous test
+// fails. It prevents any further cryptographic operations by the current
+// process.
+void BORINGSSL_FIPS_abort(void) __attribute__((noreturn));
+#endif
+
+#if defined(__cplusplus)
+} // extern C
+#endif
+
+#endif // OPENSSL_HEADER_CRYPTO_INTERNAL_H
git://repos.xcallymotion.com / motion2.git / blobdiff