6 #ifndef CRYPTOPP_SECBLOCK_H 7 #define CRYPTOPP_SECBLOCK_H 13 #if CRYPTOPP_MSC_VERSION 14 # pragma warning(push) 15 # pragma warning(disable: 4700 6386) 30 typedef size_t size_type;
31 #ifdef CRYPTOPP_MSVCRT6 32 typedef ptrdiff_t difference_type;
34 typedef std::ptrdiff_t difference_type;
37 typedef const T * const_pointer;
38 typedef T & reference;
39 typedef const T & const_reference;
41 pointer address(reference r)
const {
return (&r);}
42 const_pointer address(const_reference r)
const {
return (&r); }
43 void construct(pointer p,
const T& val) {
new (p) T(val);}
44 void destroy(pointer p) {CRYPTOPP_UNUSED(p); p->~T();}
54 #if defined(CRYPTOPP_CXX11_VARIADIC_TEMPLATES) || defined(CRYPTOPP_DOXYGEN_PROCESSING) 63 template<
typename U,
typename... Args>
64 void construct(U* ptr, Args&&... args) {::new ((
void*)ptr) U(std::forward<Args>(args)...);}
88 static void CheckSize(
size_t size)
92 throw InvalidArgument(
"AllocatorBase: requested size would cause integer overflow");
96 #define CRYPTOPP_INHERIT_ALLOCATOR_TYPES \ 97 typedef typename AllocatorBase<T>::value_type value_type;\ 98 typedef typename AllocatorBase<T>::size_type size_type;\ 99 typedef typename AllocatorBase<T>::difference_type difference_type;\ 100 typedef typename AllocatorBase<T>::pointer pointer;\ 101 typedef typename AllocatorBase<T>::const_pointer const_pointer;\ 102 typedef typename AllocatorBase<T>::reference reference;\ 103 typedef typename AllocatorBase<T>::const_reference const_reference; 115 template <
class T,
class A>
116 typename A::pointer
StandardReallocate(A& alloc, T *oldPtr,
typename A::size_type oldSize,
typename A::size_type newSize,
bool preserve)
118 assert((oldPtr && oldSize) || !(oldPtr || oldSize));
119 if (oldSize == newSize)
124 typename A::pointer newPointer = alloc.allocate(newSize, NULL);
125 const size_t copySize =
STDMIN(oldSize, newSize) *
sizeof(T);
127 if (oldPtr && newPointer) {
memcpy_s(newPointer, copySize, oldPtr, copySize);}
128 alloc.deallocate(oldPtr, oldSize);
133 alloc.deallocate(oldPtr, oldSize);
134 return alloc.allocate(newSize, NULL);
147 template <
class T,
bool T_Align16 = false>
151 CRYPTOPP_INHERIT_ALLOCATOR_TYPES
168 pointer
allocate(size_type size,
const void *ptr = NULL)
170 CRYPTOPP_UNUSED(ptr); assert(ptr == NULL);
171 this->CheckSize(size);
175 #if CRYPTOPP_BOOL_ALIGN16 177 if (T_Align16 && size*
sizeof(T) >= 16)
194 assert((ptr && size) || !(ptr || size));
197 #if CRYPTOPP_BOOL_ALIGN16 198 if (T_Align16 && size*
sizeof(T) >= 16)
218 pointer
reallocate(T *oldPtr, size_type oldSize, size_type newSize,
bool preserve)
220 assert((oldPtr && oldSize) || !(oldPtr || oldSize));
237 #if CRYPTOPP_BOOL_X86 253 CRYPTOPP_INHERIT_ALLOCATOR_TYPES
258 pointer
allocate(size_type n,
const void* unused = NULL)
260 CRYPTOPP_UNUSED(n); CRYPTOPP_UNUSED(unused);
261 assert(
false);
return NULL;
266 CRYPTOPP_UNUSED(p); CRYPTOPP_UNUSED(n);
270 size_type
max_size()
const {
return 0;}
285 template <
class T,
size_t S,
class A = NullAllocator<T>,
bool T_Align16 = false>
289 CRYPTOPP_INHERIT_ALLOCATOR_TYPES
311 if (size <= S && !m_allocated)
314 return GetAlignedArray();
317 return m_fallbackAllocator.allocate(size);
336 if (size <= S && !m_allocated)
339 return GetAlignedArray();
342 return m_fallbackAllocator.allocate(size, hint);
355 if (ptr == GetAlignedArray())
363 m_fallbackAllocator.deallocate(ptr, size);
383 pointer
reallocate(pointer oldPtr, size_type oldSize, size_type newSize,
bool preserve)
385 if (oldPtr == GetAlignedArray() && newSize <= S)
387 assert(oldSize <= S);
388 if (oldSize > newSize)
393 pointer newPointer =
allocate(newSize, NULL);
394 if (preserve && newSize)
396 const size_t copySize =
STDMIN(oldSize, newSize);
397 memcpy_s(newPointer, copySize, oldPtr, copySize);
403 size_type
max_size()
const {
return STDMAX(m_fallbackAllocator.max_size(), S);}
407 T* GetAlignedArray() {
return m_array;}
410 T* GetAlignedArray() {
return (CRYPTOPP_BOOL_ALIGN16 && T_Align16) ? (T*)(((byte *)m_array) + (0-(size_t)m_array)%16) : m_array;}
411 CRYPTOPP_ALIGN_DATA(8) T m_array[(CRYPTOPP_BOOL_ALIGN16 && T_Align16) ? S+8/
sizeof(T) : S];
413 A m_fallbackAllocator;
421 template <
class T,
class A = AllocatorWithCleanup<T> >
425 typedef typename A::value_type value_type;
426 typedef typename A::pointer iterator;
427 typedef typename A::const_pointer const_iterator;
428 typedef typename A::size_type size_type;
436 : m_size(size), m_ptr(m_alloc.
allocate(size, NULL)) { }
442 : m_size(t.m_size), m_ptr(m_alloc.
allocate(t.m_size, NULL)) {
443 assert((!t.m_ptr && !m_size) || (t.m_ptr && m_size));
444 if (t.m_ptr) {
memcpy_s(m_ptr, m_size*
sizeof(T), t.m_ptr, t.m_size*
sizeof(T));}
456 : m_size(len), m_ptr(m_alloc.
allocate(len, NULL)) {
457 assert((!m_ptr && !m_size) || (m_ptr && m_size));
459 memcpy_s(m_ptr, m_size*
sizeof(T), ptr, len*
sizeof(T));
461 memset(m_ptr, 0, m_size*
sizeof(T));
465 {m_alloc.deallocate(m_ptr, m_size);}
471 operator const void *()
const 476 operator const T *()
const 493 {
return m_ptr+m_size;}
496 const_iterator
end()
const 497 {
return m_ptr+m_size;}
501 typename A::pointer
data() {
return m_ptr;}
504 typename A::const_pointer
data()
const {
return m_ptr;}
509 size_type
size()
const {
return m_size;}
512 bool empty()
const {
return m_size == 0;}
519 const byte *
BytePtr()
const {
return (
const byte *)m_ptr;}
532 if (m_ptr && ptr && len)
533 {
memcpy_s(m_ptr, m_size*
sizeof(T), ptr, len*
sizeof(T));}
545 if (m_ptr && t.m_ptr && t.m_size)
546 {
memcpy_s(m_ptr, m_size*
sizeof(T), t, t.m_size*
sizeof(T));}
567 assert((!t.m_ptr && !t.m_size) || (t.m_ptr && t.m_ptr.m_size));
571 size_type oldSize = m_size;
572 Grow(m_size+t.m_size);
574 if (m_ptr && t.m_ptr)
575 {
memcpy_s(m_ptr+oldSize, (m_size-oldSize)*
sizeof(T), t.m_ptr, t.m_size*
sizeof(T));}
588 assert((!m_ptr && !m_size) || (m_ptr && m_size));
589 assert((!t.m_ptr && !t.m_size) || (t.m_ptr && t.m_ptr.m_size));
593 memcpy_s(result.m_ptr, result.m_size*
sizeof(T), m_ptr, m_size*
sizeof(T));
594 memcpy_s(result.m_ptr+m_size, (t.m_size-m_size)*
sizeof(T), t.m_ptr, t.m_size*
sizeof(T));
606 return m_size == t.m_size &&
VerifyBufsEqual(m_ptr, t.m_ptr, m_size*
sizeof(T));
618 return !operator==(t);
628 void New(size_type newSize)
630 m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize,
false);
643 if (m_ptr) {
memset_z(m_ptr, 0, m_size*
sizeof(T));}
657 if (newSize > m_size)
659 m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize,
true);
676 if (newSize > m_size)
678 m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize,
true);
679 memset_z(m_ptr+m_size, 0, (newSize-m_size)*
sizeof(T));
695 m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize,
true);
705 std::swap(m_alloc, b.m_alloc);
706 std::swap(m_size, b.m_size);
707 std::swap(m_ptr, b.m_ptr);
716 #ifdef CRYPTOPP_DOXYGEN_PROCESSING 740 template <
class T,
unsigned int S,
class A = FixedSizeAllocatorWithCleanup<T, S> >
753 template <
class T,
unsigned int S,
bool T_Align16 = true>
763 template <
class T,
unsigned int S,
class A = FixedSizeAllocatorWithCleanup<T, S, AllocatorWithCleanup<T> > >
771 template<
class T,
bool A,
class U,
bool B>
772 inline bool operator==(
const CryptoPP::AllocatorWithCleanup<T, A>&,
const CryptoPP::AllocatorWithCleanup<U, B>&) {
return (
true);}
773 template<
class T,
bool A,
class U,
bool B>
774 inline bool operator!=(
const CryptoPP::AllocatorWithCleanup<T, A>&,
const CryptoPP::AllocatorWithCleanup<U, B>&) {
return (
false);}
779 template <
class T,
class A>
780 inline void swap(CryptoPP::SecBlock<T, A> &a, CryptoPP::SecBlock<T, A> &b)
785 #if defined(_STLP_DONT_SUPPORT_REBIND_MEMBER_TEMPLATE) || (defined(_STLPORT_VERSION) && !defined(_STLP_MEMBER_TEMPLATE_CLASSES)) 787 template <
class _Tp1,
class _Tp2>
788 inline CryptoPP::AllocatorWithCleanup<_Tp2>&
789 __stl_alloc_rebind(CryptoPP::AllocatorWithCleanup<_Tp1>& __a,
const _Tp2*)
791 return (CryptoPP::AllocatorWithCleanup<_Tp2>&)(__a);
797 #if CRYPTOPP_MSC_VERSION 798 # pragma warning(pop) iterator end()
Provides an iterator pointing beyond the last element in the memory block.
void construct(U *ptr, Args &&... args)
Constructs a new U using variadic arguments.
An invalid argument was detected.
Base class for all allocators used by SecBlock.
void swap(SecBlock< T, A > &b)
Swap contents with another SecBlock.
Stack-based SecBlock that grows into the heap.
void destroy(U *ptr)
Destroys an U constructed with variadic arguments.
Utility functions for the Crypto++ library.
void AlignedDeallocate(void *ptr)
Frees a buffer allocated with AlignedAllocate.
FixedSizeSecBlock()
Construct a FixedSizeSecBlock.
void CleanNew(size_type newSize)
Change size without preserving contents.
SecBlock< T, A > & operator=(const SecBlock< T, A > &t)
Assign contents from another SecBlock.
size_type SizeInBytes() const
Provides the number of bytes in the SecBlock.
void resize(size_type newSize)
Change size and preserve contents.
SecBlock< T, A > & operator+=(const SecBlock< T, A > &t)
Append contents from another SecBlock.
void CleanGrow(size_type newSize)
Change size and preserve contents.
const_iterator end() const
Provides a constant iterator pointing beyond the last element in the memory block.
void Assign(const SecBlock< T, A > &t)
Copy contents from another SecBlock.
SecBlock< T, A > operator+(const SecBlock< T, A > &t)
Concatenate contents from another SecBlock.
SecBlock(size_type size=0)
Construct a SecBlock with space for size elements.
Secure memory block with allocator and cleanup.
void memcpy_s(void *dest, size_t sizeInBytes, const void *src, size_t count)
Bounds checking replacement for memcpy()
Library configuration file.
bool operator!=(const SecBlock< T, A > &t) const
Bitwise compare two SecBlocks.
pointer allocate(size_type size, const void *hint)
Allocates a block of memory.
void New(size_type newSize)
Change size without preserving contents.
SecByteBlock is a SecBlock<byte> typedef.
pointer reallocate(T *oldPtr, size_type oldSize, size_type newSize, bool preserve)
Reallocates a block of memory.
Static secure memory block with cleanup.
Allocates a block of memory with cleanup.
size_type max_size() const
Returns the maximum number of elements the allocator can provide.
void deallocate(void *ptr, size_type size)
Deallocates a block of memory.
void SecureWipeArray(T *buf, size_t n)
Sets each element of an array to 0.
bool IsAlignedOn(const void *ptr, unsigned int alignment)
Determines whether ptr is aligned to a minimum value.
void * UnalignedAllocate(size_t size)
Allocates a buffer.
A::pointer data()
Provides a pointer to the first element in the memory block.
void Assign(const T *ptr, size_type len)
Set contents and size from an array.
A::const_pointer data() const
Provides a pointer to the first element in the memory block.
pointer reallocate(pointer oldPtr, size_type oldSize, size_type newSize, bool preserve)
Reallocates a block of memory.
Fixed size stack-based SecBlock with 16-byte alignment.
AlignedSecByteBlock is a SecBlock<byte, AllocatorWithCleanup<byte, true> > typedef.
pointer allocate(size_type size, const void *ptr=NULL)
Allocates a block of memory.
Fixed size stack-based SecBlock.
SecBlock(const SecBlock< T, A > &t)
Copy construct a SecBlock from another SecBlock.
void * memset_z(void *ptr, int value, size_t num)
Memory block initializer and eraser that attempts to survive optimizations.
const T & STDMIN(const T &a, const T &b)
Replacement function for std::min.
void deallocate(void *ptr, size_type size)
Deallocates a block of memory.
iterator begin()
Provides an iterator pointing to the first element in the memory block.
bool operator==(const SecBlock< T, A > &t) const
Bitwise compare two SecBlocks.
SecBlockWithHint(size_t size)
construct a SecBlockWithHint with a count of elements
const byte * BytePtr() const
Return a byte pointer to the first element in the memory block.
A::pointer StandardReallocate(A &alloc, T *oldPtr, typename A::size_type oldSize, typename A::size_type newSize, bool preserve)
Reallocation function.
bool VerifyBufsEqual(const byte *buf1, const byte *buf2, size_t count)
Performs a near constant-time comparison of two equally sized buffers.
const_iterator begin() const
Provides a constant iterator pointing to the first element in the memory block.
SecBlock(const T *ptr, size_type len)
Construct a SecBlock from an array of elements.
pointer allocate(size_type size)
Allocates a block of memory.
const T & STDMAX(const T &a, const T &b)
Replacement function for std::max.
void Grow(size_type newSize)
Change size and preserve contents.
Crypto++ library namespace.
FixedSizeAllocatorWithCleanup()
Constructs a FixedSizeAllocatorWithCleanup.
bool empty() const
Determines if the SecBlock is empty.
void UnalignedDeallocate(void *ptr)
Frees a buffer allocated with UnalignedAllocate.
SecWordBlock is a SecBlock<word> typedef.
size_type size() const
Provides the count of elements in the SecBlock.
void * AlignedAllocate(size_t size)
Allocates a buffer on 16-byte boundary.
#define SIZE_MAX
The maximum value of a machine word.
byte * BytePtr()
Provides a byte pointer to the first element in the memory block.