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author | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
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committer | Tycho <work.tycho+git@gmail.com> | 2014-01-26 15:28:51 +0100 |
commit | bed2ee22e8283a2e8bd0790a89124839319c2fc3 (patch) | |
tree | ee9e66a7b7c63995797a502f209079c1422ce9c9 /lib/cryptopp/secblock.h | |
parent | Refactored cBlockHandler::OnUse and dependents (diff) | |
parent | Merge pull request #589 from mc-server/minecartimprovements (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | lib/cryptopp/secblock.h | 467 |
1 files changed, 0 insertions, 467 deletions
diff --git a/lib/cryptopp/secblock.h b/lib/cryptopp/secblock.h deleted file mode 100644 index 40cce3341..000000000 --- a/lib/cryptopp/secblock.h +++ /dev/null @@ -1,467 +0,0 @@ -// secblock.h - written and placed in the public domain by Wei Dai - -#ifndef CRYPTOPP_SECBLOCK_H -#define CRYPTOPP_SECBLOCK_H - -#include "config.h" -#include "misc.h" -#include <assert.h> - -NAMESPACE_BEGIN(CryptoPP) - -// ************** secure memory allocation *************** - -template<class T> -class AllocatorBase -{ -public: - typedef T value_type; - typedef size_t size_type; -#ifdef CRYPTOPP_MSVCRT6 - typedef ptrdiff_t difference_type; -#else - typedef std::ptrdiff_t difference_type; -#endif - typedef T * pointer; - typedef const T * const_pointer; - typedef T & reference; - typedef const T & const_reference; - - pointer address(reference r) const {return (&r);} - const_pointer address(const_reference r) const {return (&r); } - void construct(pointer p, const T& val) {new (p) T(val);} - void destroy(pointer p) {p->~T();} - size_type max_size() const {return ~size_type(0)/sizeof(T);} // switch to std::numeric_limits<T>::max later - -protected: - static void CheckSize(size_t n) - { - if (n > ~size_t(0) / sizeof(T)) - throw InvalidArgument("AllocatorBase: requested size would cause integer overflow"); - } -}; - -#define CRYPTOPP_INHERIT_ALLOCATOR_TYPES \ -typedef typename AllocatorBase<T>::value_type value_type;\ -typedef typename AllocatorBase<T>::size_type size_type;\ -typedef typename AllocatorBase<T>::difference_type difference_type;\ -typedef typename AllocatorBase<T>::pointer pointer;\ -typedef typename AllocatorBase<T>::const_pointer const_pointer;\ -typedef typename AllocatorBase<T>::reference reference;\ -typedef typename AllocatorBase<T>::const_reference const_reference; - -#if defined(_MSC_VER) && (_MSC_VER < 1300) -// this pragma causes an internal compiler error if placed immediately before std::swap(a, b) -#pragma warning(push) -#pragma warning(disable: 4700) // VC60 workaround: don't know how to get rid of this warning -#endif - -template <class T, class A> -typename A::pointer StandardReallocate(A& a, T *p, typename A::size_type oldSize, typename A::size_type newSize, bool preserve) -{ - if (oldSize == newSize) - return p; - - if (preserve) - { - typename A::pointer newPointer = a.allocate(newSize, NULL); - memcpy_s(newPointer, sizeof(T)*newSize, p, sizeof(T)*STDMIN(oldSize, newSize)); - a.deallocate(p, oldSize); - return newPointer; - } - else - { - a.deallocate(p, oldSize); - return a.allocate(newSize, NULL); - } -} - -#if defined(_MSC_VER) && (_MSC_VER < 1300) -#pragma warning(pop) -#endif - -template <class T, bool T_Align16 = false> -class AllocatorWithCleanup : public AllocatorBase<T> -{ -public: - CRYPTOPP_INHERIT_ALLOCATOR_TYPES - - pointer allocate(size_type n, const void * = NULL) - { - this->CheckSize(n); - if (n == 0) - return NULL; - -#if CRYPTOPP_BOOL_ALIGN16_ENABLED - if (T_Align16 && n*sizeof(T) >= 16) - return (pointer)AlignedAllocate(n*sizeof(T)); -#endif - - return (pointer)UnalignedAllocate(n*sizeof(T)); - } - - void deallocate(void *p, size_type n) - { - SecureWipeArray((pointer)p, n); - -#if CRYPTOPP_BOOL_ALIGN16_ENABLED - if (T_Align16 && n*sizeof(T) >= 16) - return AlignedDeallocate(p); -#endif - - UnalignedDeallocate(p); - } - - pointer reallocate(T *p, size_type oldSize, size_type newSize, bool preserve) - { - return StandardReallocate(*this, p, oldSize, newSize, preserve); - } - - // VS.NET STL enforces the policy of "All STL-compliant allocators have to provide a - // template class member called rebind". - template <class U> struct rebind { typedef AllocatorWithCleanup<U, T_Align16> other; }; -#if _MSC_VER >= 1500 - AllocatorWithCleanup() {} - template <class U, bool A> AllocatorWithCleanup(const AllocatorWithCleanup<U, A> &) {} -#endif -}; - -CRYPTOPP_DLL_TEMPLATE_CLASS AllocatorWithCleanup<byte>; -CRYPTOPP_DLL_TEMPLATE_CLASS AllocatorWithCleanup<word16>; -CRYPTOPP_DLL_TEMPLATE_CLASS AllocatorWithCleanup<word32>; -CRYPTOPP_DLL_TEMPLATE_CLASS AllocatorWithCleanup<word64>; -#if CRYPTOPP_BOOL_X86 -CRYPTOPP_DLL_TEMPLATE_CLASS AllocatorWithCleanup<word, true>; // for Integer -#endif - -template <class T> -class NullAllocator : public AllocatorBase<T> -{ -public: - CRYPTOPP_INHERIT_ALLOCATOR_TYPES - - pointer allocate(size_type n, const void * = NULL) - { - assert(false); - return NULL; - } - - void deallocate(void *p, size_type n) - { - assert(false); - } - - size_type max_size() const {return 0;} -}; - -// This allocator can't be used with standard collections because -// they require that all objects of the same allocator type are equivalent. -// So this is for use with SecBlock only. -template <class T, size_t S, class A = NullAllocator<T>, bool T_Align16 = false> -class FixedSizeAllocatorWithCleanup : public AllocatorBase<T> -{ -public: - CRYPTOPP_INHERIT_ALLOCATOR_TYPES - - FixedSizeAllocatorWithCleanup() : m_allocated(false) {} - - pointer allocate(size_type n) - { - assert(IsAlignedOn(m_array, 8)); - - if (n <= S && !m_allocated) - { - m_allocated = true; - return GetAlignedArray(); - } - else - return m_fallbackAllocator.allocate(n); - } - - pointer allocate(size_type n, const void *hint) - { - if (n <= S && !m_allocated) - { - m_allocated = true; - return GetAlignedArray(); - } - else - return m_fallbackAllocator.allocate(n, hint); - } - - void deallocate(void *p, size_type n) - { - if (p == GetAlignedArray()) - { - assert(n <= S); - assert(m_allocated); - m_allocated = false; - SecureWipeArray((pointer)p, n); - } - else - m_fallbackAllocator.deallocate(p, n); - } - - pointer reallocate(pointer p, size_type oldSize, size_type newSize, bool preserve) - { - if (p == GetAlignedArray() && newSize <= S) - { - assert(oldSize <= S); - if (oldSize > newSize) - SecureWipeArray(p+newSize, oldSize-newSize); - return p; - } - - pointer newPointer = allocate(newSize, NULL); - if (preserve) - memcpy(newPointer, p, sizeof(T)*STDMIN(oldSize, newSize)); - deallocate(p, oldSize); - return newPointer; - } - - size_type max_size() const {return STDMAX(m_fallbackAllocator.max_size(), S);} - -private: -#ifdef __BORLANDC__ - T* GetAlignedArray() {return m_array;} - T m_array[S]; -#else - T* GetAlignedArray() {return (CRYPTOPP_BOOL_ALIGN16_ENABLED && T_Align16) ? (T*)(((byte *)m_array) + (0-(size_t)m_array)%16) : m_array;} - CRYPTOPP_ALIGN_DATA(8) T m_array[(CRYPTOPP_BOOL_ALIGN16_ENABLED && T_Align16) ? S+8/sizeof(T) : S]; -#endif - A m_fallbackAllocator; - bool m_allocated; -}; - -//! a block of memory allocated using A -template <class T, class A = AllocatorWithCleanup<T> > -class SecBlock -{ -public: - typedef typename A::value_type value_type; - typedef typename A::pointer iterator; - typedef typename A::const_pointer const_iterator; - typedef typename A::size_type size_type; - - explicit SecBlock(size_type size=0) - : m_size(size) {m_ptr = m_alloc.allocate(size, NULL);} - SecBlock(const SecBlock<T, A> &t) - : m_size(t.m_size) {m_ptr = m_alloc.allocate(m_size, NULL); memcpy_s(m_ptr, m_size*sizeof(T), t.m_ptr, m_size*sizeof(T));} - SecBlock(const T *t, size_type len) - : m_size(len) - { - m_ptr = m_alloc.allocate(len, NULL); - if (t == NULL) - memset_z(m_ptr, 0, len*sizeof(T)); - else - memcpy(m_ptr, t, len*sizeof(T)); - } - - ~SecBlock() - {m_alloc.deallocate(m_ptr, m_size);} - -#ifdef __BORLANDC__ - operator T *() const - {return (T*)m_ptr;} -#else - operator const void *() const - {return m_ptr;} - operator void *() - {return m_ptr;} - - operator const T *() const - {return m_ptr;} - operator T *() - {return m_ptr;} -#endif - -// T *operator +(size_type offset) -// {return m_ptr+offset;} - -// const T *operator +(size_type offset) const -// {return m_ptr+offset;} - -// T& operator[](size_type index) -// {assert(index >= 0 && index < m_size); return m_ptr[index];} - -// const T& operator[](size_type index) const -// {assert(index >= 0 && index < m_size); return m_ptr[index];} - - iterator begin() - {return m_ptr;} - const_iterator begin() const - {return m_ptr;} - iterator end() - {return m_ptr+m_size;} - const_iterator end() const - {return m_ptr+m_size;} - - typename A::pointer data() {return m_ptr;} - typename A::const_pointer data() const {return m_ptr;} - - size_type size() const {return m_size;} - bool empty() const {return m_size == 0;} - - byte * BytePtr() {return (byte *)m_ptr;} - const byte * BytePtr() const {return (const byte *)m_ptr;} - size_type SizeInBytes() const {return m_size*sizeof(T);} - - //! set contents and size - void Assign(const T *t, size_type len) - { - New(len); - memcpy_s(m_ptr, m_size*sizeof(T), t, len*sizeof(T)); - } - - //! copy contents and size from another SecBlock - void Assign(const SecBlock<T, A> &t) - { - if (this != &t) - { - New(t.m_size); - memcpy_s(m_ptr, m_size*sizeof(T), t.m_ptr, m_size*sizeof(T)); - } - } - - SecBlock<T, A>& operator=(const SecBlock<T, A> &t) - { - Assign(t); - return *this; - } - - // append to this object - SecBlock<T, A>& operator+=(const SecBlock<T, A> &t) - { - size_type oldSize = m_size; - Grow(m_size+t.m_size); - memcpy_s(m_ptr+oldSize, m_size*sizeof(T), t.m_ptr, t.m_size*sizeof(T)); - return *this; - } - - // append operator - SecBlock<T, A> operator+(const SecBlock<T, A> &t) - { - SecBlock<T, A> result(m_size+t.m_size); - memcpy_s(result.m_ptr, result.m_size*sizeof(T), m_ptr, m_size*sizeof(T)); - memcpy_s(result.m_ptr+m_size, t.m_size*sizeof(T), t.m_ptr, t.m_size*sizeof(T)); - return result; - } - - bool operator==(const SecBlock<T, A> &t) const - { - return m_size == t.m_size && VerifyBufsEqual(m_ptr, t.m_ptr, m_size*sizeof(T)); - } - - bool operator!=(const SecBlock<T, A> &t) const - { - return !operator==(t); - } - - //! change size, without preserving contents - void New(size_type newSize) - { - m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize, false); - m_size = newSize; - } - - //! change size and set contents to 0 - void CleanNew(size_type newSize) - { - New(newSize); - memset_z(m_ptr, 0, m_size*sizeof(T)); - } - - //! change size only if newSize > current size. contents are preserved - void Grow(size_type newSize) - { - if (newSize > m_size) - { - m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize, true); - m_size = newSize; - } - } - - //! change size only if newSize > current size. contents are preserved and additional area is set to 0 - void CleanGrow(size_type newSize) - { - if (newSize > m_size) - { - m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize, true); - memset(m_ptr+m_size, 0, (newSize-m_size)*sizeof(T)); - m_size = newSize; - } - } - - //! change size and preserve contents - void resize(size_type newSize) - { - m_ptr = m_alloc.reallocate(m_ptr, m_size, newSize, true); - m_size = newSize; - } - - //! swap contents and size with another SecBlock - void swap(SecBlock<T, A> &b) - { - std::swap(m_alloc, b.m_alloc); - std::swap(m_size, b.m_size); - std::swap(m_ptr, b.m_ptr); - } - -//private: - A m_alloc; - size_type m_size; - T *m_ptr; -}; - -typedef SecBlock<byte> SecByteBlock; -typedef SecBlock<byte, AllocatorWithCleanup<byte, true> > AlignedSecByteBlock; -typedef SecBlock<word> SecWordBlock; - -//! a SecBlock with fixed size, allocated statically -template <class T, unsigned int S, class A = FixedSizeAllocatorWithCleanup<T, S> > -class FixedSizeSecBlock : public SecBlock<T, A> -{ -public: - explicit FixedSizeSecBlock() : SecBlock<T, A>(S) {} -}; - -template <class T, unsigned int S, bool T_Align16 = true> -class FixedSizeAlignedSecBlock : public FixedSizeSecBlock<T, S, FixedSizeAllocatorWithCleanup<T, S, NullAllocator<T>, T_Align16> > -{ -}; - -//! a SecBlock that preallocates size S statically, and uses the heap when this size is exceeded -template <class T, unsigned int S, class A = FixedSizeAllocatorWithCleanup<T, S, AllocatorWithCleanup<T> > > -class SecBlockWithHint : public SecBlock<T, A> -{ -public: - explicit SecBlockWithHint(size_t size) : SecBlock<T, A>(size) {} -}; - -template<class T, bool A, class U, bool B> -inline bool operator==(const CryptoPP::AllocatorWithCleanup<T, A>&, const CryptoPP::AllocatorWithCleanup<U, B>&) {return (true);} -template<class T, bool A, class U, bool B> -inline bool operator!=(const CryptoPP::AllocatorWithCleanup<T, A>&, const CryptoPP::AllocatorWithCleanup<U, B>&) {return (false);} - -NAMESPACE_END - -NAMESPACE_BEGIN(std) -template <class T, class A> -inline void swap(CryptoPP::SecBlock<T, A> &a, CryptoPP::SecBlock<T, A> &b) -{ - a.swap(b); -} - -#if defined(_STLP_DONT_SUPPORT_REBIND_MEMBER_TEMPLATE) || (defined(_STLPORT_VERSION) && !defined(_STLP_MEMBER_TEMPLATE_CLASSES)) -// working for STLport 5.1.3 and MSVC 6 SP5 -template <class _Tp1, class _Tp2> -inline CryptoPP::AllocatorWithCleanup<_Tp2>& -__stl_alloc_rebind(CryptoPP::AllocatorWithCleanup<_Tp1>& __a, const _Tp2*) -{ - return (CryptoPP::AllocatorWithCleanup<_Tp2>&)(__a); -} -#endif - -NAMESPACE_END - -#endif |