1286 lines
33 KiB
C++
1286 lines
33 KiB
C++
#ifndef CRYPTOPP_MISC_H
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#define CRYPTOPP_MISC_H
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#include "cryptlib.h"
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#include "smartptr.h"
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#include <string.h> // for memcpy and memmove
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#ifdef _MSC_VER
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#if _MSC_VER >= 1400
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// VC2005 workaround: disable declarations that conflict with winnt.h
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#define _interlockedbittestandset CRYPTOPP_DISABLED_INTRINSIC_1
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#define _interlockedbittestandreset CRYPTOPP_DISABLED_INTRINSIC_2
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#define _interlockedbittestandset64 CRYPTOPP_DISABLED_INTRINSIC_3
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#define _interlockedbittestandreset64 CRYPTOPP_DISABLED_INTRINSIC_4
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#include <intrin.h>
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#undef _interlockedbittestandset
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#undef _interlockedbittestandreset
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#undef _interlockedbittestandset64
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#undef _interlockedbittestandreset64
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#define CRYPTOPP_FAST_ROTATE(x) 1
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#elif _MSC_VER >= 1300
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#define CRYPTOPP_FAST_ROTATE(x) ((x) == 32 | (x) == 64)
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#else
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#define CRYPTOPP_FAST_ROTATE(x) ((x) == 32)
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#endif
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#elif (defined(__MWERKS__) && TARGET_CPU_PPC) || \
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(defined(__GNUC__) && (defined(_ARCH_PWR2) || defined(_ARCH_PWR) || defined(_ARCH_PPC) || defined(_ARCH_PPC64) || defined(_ARCH_COM)))
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#define CRYPTOPP_FAST_ROTATE(x) ((x) == 32)
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#elif defined(__GNUC__) && (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X86) // depend on GCC's peephole optimization to generate rotate instructions
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#define CRYPTOPP_FAST_ROTATE(x) 1
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#else
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#define CRYPTOPP_FAST_ROTATE(x) 0
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#endif
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#ifdef __BORLANDC__
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#include <mem.h>
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#endif
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// !KLUDGE! @FD This gets confused and tries to include
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// tier1/byteswap.h. We'll just fall back on the slower
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// routines.
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//#if defined(__GNUC__) && defined(__linux__)
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//#define CRYPTOPP_BYTESWAP_AVAILABLE
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//#include <byteswap.h>
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//#endif
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NAMESPACE_BEGIN(CryptoPP)
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// ************** compile-time assertion ***************
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template <bool b>
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struct CompileAssert
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{
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static char dummy[2*b-1];
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};
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#define CRYPTOPP_COMPILE_ASSERT(assertion) CRYPTOPP_COMPILE_ASSERT_INSTANCE(assertion, __LINE__)
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#if defined(CRYPTOPP_EXPORTS) || defined(CRYPTOPP_IMPORTS)
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#define CRYPTOPP_COMPILE_ASSERT_INSTANCE(assertion, instance)
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#else
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#define CRYPTOPP_COMPILE_ASSERT_INSTANCE(assertion, instance) static CompileAssert<(assertion)> CRYPTOPP_ASSERT_JOIN(cryptopp_assert_, instance)
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#endif
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#define CRYPTOPP_ASSERT_JOIN(X, Y) CRYPTOPP_DO_ASSERT_JOIN(X, Y)
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#define CRYPTOPP_DO_ASSERT_JOIN(X, Y) X##Y
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// ************** misc classes ***************
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class CRYPTOPP_DLL Empty
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{
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};
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//! _
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template <class BASE1, class BASE2>
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class CRYPTOPP_NO_VTABLE TwoBases : public BASE1, public BASE2
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{
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};
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//! _
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template <class BASE1, class BASE2, class BASE3>
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class CRYPTOPP_NO_VTABLE ThreeBases : public BASE1, public BASE2, public BASE3
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{
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};
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template <class T>
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class ObjectHolder
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{
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protected:
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T m_object;
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};
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class NotCopyable
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{
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public:
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NotCopyable() {}
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private:
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NotCopyable(const NotCopyable &);
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void operator=(const NotCopyable &);
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};
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template <class T>
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struct NewObject
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{
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T* operator()() const {return new T;}
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};
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/*! This function safely initializes a static object in a multithreaded environment without using locks (for portability).
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Note that if two threads call Ref() at the same time, they may get back different references, and one object
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may end up being memory leaked. This is by design.
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*/
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template <class T, class F = NewObject<T>, int instance=0>
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class Singleton
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{
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public:
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Singleton(F objectFactory = F()) : m_objectFactory(objectFactory) {}
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// prevent this function from being inlined
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CRYPTOPP_NOINLINE const T & Ref(CRYPTOPP_NOINLINE_DOTDOTDOT) const;
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private:
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F m_objectFactory;
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};
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template <class T, class F, int instance>
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const T & Singleton<T, F, instance>::Ref(CRYPTOPP_NOINLINE_DOTDOTDOT) const
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{
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static volatile simple_ptr<T> s_pObject;
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T *p = s_pObject.m_p;
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if (p)
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return *p;
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T *newObject = m_objectFactory();
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p = s_pObject.m_p;
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if (p)
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{
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delete newObject;
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return *p;
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}
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s_pObject.m_p = newObject;
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return *newObject;
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}
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// ************** misc functions ***************
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#if (!__STDC_WANT_SECURE_LIB__)
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inline void memcpy_s(void *dest, size_t sizeInBytes, const void *src, size_t count)
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{
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if (count > sizeInBytes)
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throw InvalidArgument("memcpy_s: buffer overflow");
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memcpy(dest, src, count);
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}
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inline void memmove_s(void *dest, size_t sizeInBytes, const void *src, size_t count)
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{
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if (count > sizeInBytes)
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throw InvalidArgument("memmove_s: buffer overflow");
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memmove(dest, src, count);
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}
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#if __BORLANDC__ >= 0x620
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// C++Builder 2010 workaround: can't use std::memcpy_s because it doesn't allow 0 lengths
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#define memcpy_s CryptoPP::memcpy_s
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#define memmove_s CryptoPP::memmove_s
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#endif
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#endif
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inline void * memset_z(void *ptr, int value, size_t num)
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{
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// avoid extranous warning on GCC 4.3.2 Ubuntu 8.10
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#if CRYPTOPP_GCC_VERSION >= 30001
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if (__builtin_constant_p(num) && num==0)
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return ptr;
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#endif
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return memset(ptr, value, num);
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}
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// can't use std::min or std::max in MSVC60 or Cygwin 1.1.0
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template <class T> inline const T& STDMIN(const T& a, const T& b)
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{
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return b < a ? b : a;
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}
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template <class T1, class T2> inline const T1 UnsignedMin(const T1& a, const T2& b)
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{
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CRYPTOPP_COMPILE_ASSERT((sizeof(T1)<=sizeof(T2) && T2(-1)>0) || (sizeof(T1)>sizeof(T2) && T1(-1)>0));
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assert(a==0 || a>0); // GCC workaround: get rid of the warning "comparison is always true due to limited range of data type"
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assert(b>=0);
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if (sizeof(T1)<=sizeof(T2))
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return b < (T2)a ? (T1)b : a;
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else
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return (T1)b < a ? (T1)b : a;
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}
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template <class T> inline const T& STDMAX(const T& a, const T& b)
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{
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return a < b ? b : a;
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}
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#define RETURN_IF_NONZERO(x) size_t returnedValue = x; if (returnedValue) return returnedValue
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// this version of the macro is fastest on Pentium 3 and Pentium 4 with MSVC 6 SP5 w/ Processor Pack
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#define GETBYTE(x, y) (unsigned int)byte((x)>>(8*(y)))
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// these may be faster on other CPUs/compilers
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// #define GETBYTE(x, y) (unsigned int)(((x)>>(8*(y)))&255)
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// #define GETBYTE(x, y) (((byte *)&(x))[y])
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#define CRYPTOPP_GET_BYTE_AS_BYTE(x, y) byte((x)>>(8*(y)))
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template <class T>
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unsigned int Parity(T value)
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{
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for (unsigned int i=8*sizeof(value)/2; i>0; i/=2)
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value ^= value >> i;
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return (unsigned int)value&1;
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}
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template <class T>
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unsigned int BytePrecision(const T &value)
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{
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if (!value)
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return 0;
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unsigned int l=0, h=8*sizeof(value);
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while (h-l > 8)
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{
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unsigned int t = (l+h)/2;
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if (value >> t)
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l = t;
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else
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h = t;
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}
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return h/8;
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}
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template <class T>
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unsigned int BitPrecision(const T &value)
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{
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if (!value)
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return 0;
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unsigned int l=0, h=8*sizeof(value);
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while (h-l > 1)
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{
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unsigned int t = (l+h)/2;
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if (value >> t)
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l = t;
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else
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h = t;
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}
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return h;
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}
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inline unsigned int TrailingZeros(word32 v)
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{
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#if defined(__GNUC__) && CRYPTOPP_GCC_VERSION >= 30400
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return __builtin_ctz(v);
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#elif defined(_MSC_VER) && _MSC_VER >= 1400
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unsigned long result;
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_BitScanForward(&result, v);
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return result;
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#else
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// from http://graphics.stanford.edu/~seander/bithacks.html#ZerosOnRightMultLookup
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static const int MultiplyDeBruijnBitPosition[32] =
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{
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0, 1, 28, 2, 29, 14, 24, 3, 30, 22, 20, 15, 25, 17, 4, 8,
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31, 27, 13, 23, 21, 19, 16, 7, 26, 12, 18, 6, 11, 5, 10, 9
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};
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return MultiplyDeBruijnBitPosition[((word32)((v & -v) * 0x077CB531U)) >> 27];
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#endif
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}
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inline unsigned int TrailingZeros(word64 v)
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{
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#if defined(__GNUC__) && CRYPTOPP_GCC_VERSION >= 30400
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return __builtin_ctzll(v);
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#elif defined(_MSC_VER) && _MSC_VER >= 1400 && (defined(_M_X64) || defined(_M_IA64))
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unsigned long result;
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_BitScanForward64(&result, v);
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return result;
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#else
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return word32(v) ? TrailingZeros(word32(v)) : 32 + TrailingZeros(word32(v>>32));
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#endif
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}
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template <class T>
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inline T Crop(T value, size_t size)
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{
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if (size < 8*sizeof(value))
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return T(value & ((T(1) << size) - 1));
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else
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return value;
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}
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template <class T1, class T2>
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inline bool SafeConvert(T1 from, T2 &to)
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{
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to = (T2)from;
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if (from != to || (from > 0) != (to > 0))
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return false;
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return true;
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}
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inline size_t BitsToBytes(size_t bitCount)
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{
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return ((bitCount+7)/(8));
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}
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inline size_t BytesToWords(size_t byteCount)
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{
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return ((byteCount+WORD_SIZE-1)/WORD_SIZE);
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}
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inline size_t BitsToWords(size_t bitCount)
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{
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return ((bitCount+WORD_BITS-1)/(WORD_BITS));
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}
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inline size_t BitsToDwords(size_t bitCount)
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{
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return ((bitCount+2*WORD_BITS-1)/(2*WORD_BITS));
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}
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CRYPTOPP_DLL void CRYPTOPP_API xorbuf(byte *buf, const byte *mask, size_t count);
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CRYPTOPP_DLL void CRYPTOPP_API xorbuf(byte *output, const byte *input, const byte *mask, size_t count);
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CRYPTOPP_DLL bool CRYPTOPP_API VerifyBufsEqual(const byte *buf1, const byte *buf2, size_t count);
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template <class T>
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inline bool IsPowerOf2(const T &n)
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{
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return n > 0 && (n & (n-1)) == 0;
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}
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template <class T1, class T2>
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inline T2 ModPowerOf2(const T1 &a, const T2 &b)
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{
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assert(IsPowerOf2(b));
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return T2(a) & (b-1);
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}
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template <class T1, class T2>
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inline T1 RoundDownToMultipleOf(const T1 &n, const T2 &m)
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{
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if (IsPowerOf2(m))
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return n - ModPowerOf2(n, m);
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else
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return n - n%m;
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}
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template <class T1, class T2>
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inline T1 RoundUpToMultipleOf(const T1 &n, const T2 &m)
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{
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if (n+m-1 < n)
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throw InvalidArgument("RoundUpToMultipleOf: integer overflow");
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return RoundDownToMultipleOf(n+m-1, m);
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}
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template <class T>
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inline unsigned int GetAlignmentOf(T *dummy=NULL) // VC60 workaround
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{
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#ifdef CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
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if (sizeof(T) < 16)
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return 1;
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#endif
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#if (_MSC_VER >= 1300)
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return __alignof(T);
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#elif defined(__GNUC__)
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return __alignof__(T);
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#elif CRYPTOPP_BOOL_SLOW_WORD64
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return UnsignedMin(4U, sizeof(T));
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#else
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return sizeof(T);
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#endif
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}
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inline bool IsAlignedOn(const void *p, unsigned int alignment)
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{
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return alignment==1 || (IsPowerOf2(alignment) ? ModPowerOf2((size_t)p, alignment) == 0 : (size_t)p % alignment == 0);
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}
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template <class T>
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inline bool IsAligned(const void *p, T *dummy=NULL) // VC60 workaround
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{
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return IsAlignedOn(p, GetAlignmentOf<T>());
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}
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#ifdef IS_LITTLE_ENDIAN
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typedef LittleEndian NativeByteOrder;
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#else
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typedef BigEndian NativeByteOrder;
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#endif
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inline ByteOrder GetNativeByteOrder()
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{
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return NativeByteOrder::ToEnum();
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}
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inline bool NativeByteOrderIs(ByteOrder order)
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{
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return order == GetNativeByteOrder();
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}
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template <class T>
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std::string IntToString(T a, unsigned int base = 10)
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{
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if (a == 0)
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return "0";
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bool negate = false;
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if (a < 0)
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{
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negate = true;
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a = 0-a; // VC .NET does not like -a
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}
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std::string result;
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while (a > 0)
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{
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T digit = a % base;
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result = char((digit < 10 ? '0' : ('a' - 10)) + digit) + result;
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a /= base;
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}
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if (negate)
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result = "-" + result;
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return result;
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}
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template <class T1, class T2>
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inline T1 SaturatingSubtract(const T1 &a, const T2 &b)
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{
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return T1((a > b) ? (a - b) : 0);
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}
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template <class T>
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inline CipherDir GetCipherDir(const T &obj)
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{
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return obj.IsForwardTransformation() ? ENCRYPTION : DECRYPTION;
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}
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CRYPTOPP_DLL void CRYPTOPP_API CallNewHandler();
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inline void IncrementCounterByOne(byte *inout, unsigned int s)
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{
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for (int i=s-1, carry=1; i>=0 && carry; i--)
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carry = !++inout[i];
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}
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inline void IncrementCounterByOne(byte *output, const byte *input, unsigned int s)
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{
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int i, carry;
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for (i=s-1, carry=1; i>=0 && carry; i--)
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carry = ((output[i] = input[i]+1) == 0);
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memcpy_s(output, s, input, i+1);
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}
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template <class T>
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inline void ConditionalSwap(bool c, T &a, T &b)
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{
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T t = c * (a ^ b);
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a ^= t;
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b ^= t;
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}
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template <class T>
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inline void ConditionalSwapPointers(bool c, T &a, T &b)
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{
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ptrdiff_t t = c * (a - b);
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a -= t;
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b += t;
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}
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// see http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO/protect-secrets.html
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// and https://www.securecoding.cert.org/confluence/display/cplusplus/MSC06-CPP.+Be+aware+of+compiler+optimization+when+dealing+with+sensitive+data
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template <class T>
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void SecureWipeBuffer(T *buf, size_t n)
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{
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// GCC 4.3.2 on Cygwin optimizes away the first store if this loop is done in the forward direction
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volatile T *p = buf+n;
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while (n--)
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*(--p) = 0;
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}
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#if (_MSC_VER >= 1400 || defined(__GNUC__)) && (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X86)
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template<> inline void SecureWipeBuffer(byte *buf, size_t n)
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{
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volatile byte *p = buf;
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#ifdef __GNUC__
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asm volatile("rep stosb" : "+c"(n), "+D"(p) : "a"(0) : "memory");
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#else
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__stosb((byte *)(size_t)p, 0, n);
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#endif
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}
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template<> inline void SecureWipeBuffer(word16 *buf, size_t n)
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{
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volatile word16 *p = buf;
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#ifdef __GNUC__
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asm volatile("rep stosw" : "+c"(n), "+D"(p) : "a"(0) : "memory");
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#else
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__stosw((word16 *)(size_t)p, 0, n);
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#endif
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}
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template<> inline void SecureWipeBuffer(word32 *buf, size_t n)
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{
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volatile word32 *p = buf;
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|
#ifdef __GNUC__
|
|
asm volatile("rep stosl" : "+c"(n), "+D"(p) : "a"(0) : "memory");
|
|
#else
|
|
__stosd((unsigned long *)(size_t)p, 0, n);
|
|
#endif
|
|
}
|
|
|
|
template<> inline void SecureWipeBuffer(word64 *buf, size_t n)
|
|
{
|
|
#if CRYPTOPP_BOOL_X64
|
|
volatile word64 *p = buf;
|
|
#ifdef __GNUC__
|
|
asm volatile("rep stosq" : "+c"(n), "+D"(p) : "a"(0) : "memory");
|
|
#else
|
|
__stosq((word64 *)(size_t)p, 0, n);
|
|
#endif
|
|
#else
|
|
SecureWipeBuffer((word32 *)buf, 2*n);
|
|
#endif
|
|
}
|
|
|
|
#endif // #if (_MSC_VER >= 1400 || defined(__GNUC__)) && (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X86)
|
|
|
|
template <class T>
|
|
inline void SecureWipeArray(T *buf, size_t n)
|
|
{
|
|
if (sizeof(T) % 8 == 0 && GetAlignmentOf<T>() % GetAlignmentOf<word64>() == 0)
|
|
SecureWipeBuffer((word64 *)buf, n * (sizeof(T)/8));
|
|
else if (sizeof(T) % 4 == 0 && GetAlignmentOf<T>() % GetAlignmentOf<word32>() == 0)
|
|
SecureWipeBuffer((word32 *)buf, n * (sizeof(T)/4));
|
|
else if (sizeof(T) % 2 == 0 && GetAlignmentOf<T>() % GetAlignmentOf<word16>() == 0)
|
|
SecureWipeBuffer((word16 *)buf, n * (sizeof(T)/2));
|
|
else
|
|
SecureWipeBuffer((byte *)buf, n * sizeof(T));
|
|
}
|
|
|
|
// this function uses wcstombs(), which assumes that setlocale() has been called
|
|
static std::string StringNarrow(const wchar_t *str, bool throwOnError = true)
|
|
{
|
|
#ifdef _MSC_VER
|
|
#pragma warning(push)
|
|
#pragma warning(disable: 4996) // 'wcstombs': This function or variable may be unsafe.
|
|
#endif
|
|
size_t size = wcstombs(NULL, str, 0);
|
|
if (size == size_t(0)-1)
|
|
{
|
|
if (throwOnError)
|
|
throw InvalidArgument("StringNarrow: wcstombs() call failed");
|
|
else
|
|
return std::string();
|
|
}
|
|
std::string result(size, 0);
|
|
wcstombs(&result[0], str, size);
|
|
return result;
|
|
#ifdef _MSC_VER
|
|
#pragma warning(pop)
|
|
#endif
|
|
}
|
|
|
|
#if CRYPTOPP_BOOL_ALIGN16_ENABLED
|
|
CRYPTOPP_DLL void * CRYPTOPP_API AlignedAllocate(size_t size);
|
|
CRYPTOPP_DLL void CRYPTOPP_API AlignedDeallocate(void *p);
|
|
#endif
|
|
|
|
CRYPTOPP_DLL void * CRYPTOPP_API UnalignedAllocate(size_t size);
|
|
CRYPTOPP_DLL void CRYPTOPP_API UnalignedDeallocate(void *p);
|
|
|
|
// ************** rotate functions ***************
|
|
|
|
template <class T> inline T rotlFixed(T x, unsigned int y)
|
|
{
|
|
assert(y < sizeof(T)*8);
|
|
return T((x<<y) | (x>>(sizeof(T)*8-y)));
|
|
}
|
|
|
|
template <class T> inline T rotrFixed(T x, unsigned int y)
|
|
{
|
|
assert(y < sizeof(T)*8);
|
|
return T((x>>y) | (x<<(sizeof(T)*8-y)));
|
|
}
|
|
|
|
template <class T> inline T rotlVariable(T x, unsigned int y)
|
|
{
|
|
assert(y < sizeof(T)*8);
|
|
return T((x<<y) | (x>>(sizeof(T)*8-y)));
|
|
}
|
|
|
|
template <class T> inline T rotrVariable(T x, unsigned int y)
|
|
{
|
|
assert(y < sizeof(T)*8);
|
|
return T((x>>y) | (x<<(sizeof(T)*8-y)));
|
|
}
|
|
|
|
template <class T> inline T rotlMod(T x, unsigned int y)
|
|
{
|
|
y %= sizeof(T)*8;
|
|
return T((x<<y) | (x>>(sizeof(T)*8-y)));
|
|
}
|
|
|
|
template <class T> inline T rotrMod(T x, unsigned int y)
|
|
{
|
|
y %= sizeof(T)*8;
|
|
return T((x>>y) | (x<<(sizeof(T)*8-y)));
|
|
}
|
|
|
|
#ifdef _MSC_VER
|
|
|
|
template<> inline word32 rotlFixed<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _lrotl(x, y) : x;
|
|
}
|
|
|
|
template<> inline word32 rotrFixed<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _lrotr(x, y) : x;
|
|
}
|
|
|
|
template<> inline word32 rotlVariable<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _lrotl(x, y);
|
|
}
|
|
|
|
template<> inline word32 rotrVariable<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _lrotr(x, y);
|
|
}
|
|
|
|
template<> inline word32 rotlMod<word32>(word32 x, unsigned int y)
|
|
{
|
|
return _lrotl(x, y);
|
|
}
|
|
|
|
template<> inline word32 rotrMod<word32>(word32 x, unsigned int y)
|
|
{
|
|
return _lrotr(x, y);
|
|
}
|
|
|
|
#endif // #ifdef _MSC_VER
|
|
|
|
#if _MSC_VER >= 1300 && !defined(__INTEL_COMPILER)
|
|
// Intel C++ Compiler 10.0 calls a function instead of using the rotate instruction when using these instructions
|
|
|
|
template<> inline word64 rotlFixed<word64>(word64 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _rotl64(x, y) : x;
|
|
}
|
|
|
|
template<> inline word64 rotrFixed<word64>(word64 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _rotr64(x, y) : x;
|
|
}
|
|
|
|
template<> inline word64 rotlVariable<word64>(word64 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _rotl64(x, y);
|
|
}
|
|
|
|
template<> inline word64 rotrVariable<word64>(word64 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _rotr64(x, y);
|
|
}
|
|
|
|
template<> inline word64 rotlMod<word64>(word64 x, unsigned int y)
|
|
{
|
|
return _rotl64(x, y);
|
|
}
|
|
|
|
template<> inline word64 rotrMod<word64>(word64 x, unsigned int y)
|
|
{
|
|
return _rotr64(x, y);
|
|
}
|
|
|
|
#endif // #if _MSC_VER >= 1310
|
|
|
|
#if _MSC_VER >= 1400 && !defined(__INTEL_COMPILER)
|
|
// Intel C++ Compiler 10.0 gives undefined externals with these
|
|
|
|
template<> inline word16 rotlFixed<word16>(word16 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _rotl16(x, y) : x;
|
|
}
|
|
|
|
template<> inline word16 rotrFixed<word16>(word16 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _rotr16(x, y) : x;
|
|
}
|
|
|
|
template<> inline word16 rotlVariable<word16>(word16 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _rotl16(x, y);
|
|
}
|
|
|
|
template<> inline word16 rotrVariable<word16>(word16 x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _rotr16(x, y);
|
|
}
|
|
|
|
template<> inline word16 rotlMod<word16>(word16 x, unsigned int y)
|
|
{
|
|
return _rotl16(x, y);
|
|
}
|
|
|
|
template<> inline word16 rotrMod<word16>(word16 x, unsigned int y)
|
|
{
|
|
return _rotr16(x, y);
|
|
}
|
|
|
|
template<> inline byte rotlFixed<byte>(byte x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _rotl8(x, y) : x;
|
|
}
|
|
|
|
template<> inline byte rotrFixed<byte>(byte x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return y ? _rotr8(x, y) : x;
|
|
}
|
|
|
|
template<> inline byte rotlVariable<byte>(byte x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _rotl8(x, y);
|
|
}
|
|
|
|
template<> inline byte rotrVariable<byte>(byte x, unsigned int y)
|
|
{
|
|
assert(y < 8*sizeof(x));
|
|
return _rotr8(x, y);
|
|
}
|
|
|
|
template<> inline byte rotlMod<byte>(byte x, unsigned int y)
|
|
{
|
|
return _rotl8(x, y);
|
|
}
|
|
|
|
template<> inline byte rotrMod<byte>(byte x, unsigned int y)
|
|
{
|
|
return _rotr8(x, y);
|
|
}
|
|
|
|
#endif // #if _MSC_VER >= 1400
|
|
|
|
#if (defined(__MWERKS__) && TARGET_CPU_PPC)
|
|
|
|
template<> inline word32 rotlFixed<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 32);
|
|
return y ? __rlwinm(x,y,0,31) : x;
|
|
}
|
|
|
|
template<> inline word32 rotrFixed<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 32);
|
|
return y ? __rlwinm(x,32-y,0,31) : x;
|
|
}
|
|
|
|
template<> inline word32 rotlVariable<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 32);
|
|
return (__rlwnm(x,y,0,31));
|
|
}
|
|
|
|
template<> inline word32 rotrVariable<word32>(word32 x, unsigned int y)
|
|
{
|
|
assert(y < 32);
|
|
return (__rlwnm(x,32-y,0,31));
|
|
}
|
|
|
|
template<> inline word32 rotlMod<word32>(word32 x, unsigned int y)
|
|
{
|
|
return (__rlwnm(x,y,0,31));
|
|
}
|
|
|
|
template<> inline word32 rotrMod<word32>(word32 x, unsigned int y)
|
|
{
|
|
return (__rlwnm(x,32-y,0,31));
|
|
}
|
|
|
|
#endif // #if (defined(__MWERKS__) && TARGET_CPU_PPC)
|
|
|
|
// ************** endian reversal ***************
|
|
|
|
template <class T>
|
|
inline unsigned int GetByte(ByteOrder order, T value, unsigned int index)
|
|
{
|
|
if (order == LITTLE_ENDIAN_ORDER)
|
|
return GETBYTE(value, index);
|
|
else
|
|
return GETBYTE(value, sizeof(T)-index-1);
|
|
}
|
|
|
|
inline byte ByteReverse(byte value)
|
|
{
|
|
return value;
|
|
}
|
|
|
|
inline word16 ByteReverse(word16 value)
|
|
{
|
|
#ifdef CRYPTOPP_BYTESWAP_AVAILABLE
|
|
return bswap_16(value);
|
|
#elif defined(_MSC_VER) && _MSC_VER >= 1300
|
|
return _byteswap_ushort(value);
|
|
#else
|
|
return rotlFixed(value, 8U);
|
|
#endif
|
|
}
|
|
|
|
inline word32 ByteReverse(word32 value)
|
|
{
|
|
#if defined(__GNUC__) && defined(CRYPTOPP_X86_ASM_AVAILABLE)
|
|
__asm__ ("bswap %0" : "=r" (value) : "0" (value));
|
|
return value;
|
|
#elif defined(CRYPTOPP_BYTESWAP_AVAILABLE)
|
|
return bswap_32(value);
|
|
#elif defined(__MWERKS__) && TARGET_CPU_PPC
|
|
return (word32)__lwbrx(&value,0);
|
|
#elif _MSC_VER >= 1400 || (_MSC_VER >= 1300 && !defined(_DLL))
|
|
return _byteswap_ulong(value);
|
|
#elif CRYPTOPP_FAST_ROTATE(32)
|
|
// 5 instructions with rotate instruction, 9 without
|
|
return (rotrFixed(value, 8U) & 0xff00ff00) | (rotlFixed(value, 8U) & 0x00ff00ff);
|
|
#else
|
|
// 6 instructions with rotate instruction, 8 without
|
|
value = ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8);
|
|
return rotlFixed(value, 16U);
|
|
#endif
|
|
}
|
|
|
|
inline word64 ByteReverse(word64 value)
|
|
{
|
|
#if defined(__GNUC__) && defined(CRYPTOPP_X86_ASM_AVAILABLE) && defined(__x86_64__)
|
|
__asm__ ("bswap %0" : "=r" (value) : "0" (value));
|
|
return value;
|
|
#elif defined(CRYPTOPP_BYTESWAP_AVAILABLE)
|
|
return bswap_64(value);
|
|
#elif defined(_MSC_VER) && _MSC_VER >= 1300
|
|
return _byteswap_uint64(value);
|
|
#elif CRYPTOPP_BOOL_SLOW_WORD64
|
|
return (word64(ByteReverse(word32(value))) << 32) | ByteReverse(word32(value>>32));
|
|
#else
|
|
value = ((value & W64LIT(0xFF00FF00FF00FF00)) >> 8) | ((value & W64LIT(0x00FF00FF00FF00FF)) << 8);
|
|
value = ((value & W64LIT(0xFFFF0000FFFF0000)) >> 16) | ((value & W64LIT(0x0000FFFF0000FFFF)) << 16);
|
|
return rotlFixed(value, 32U);
|
|
#endif
|
|
}
|
|
|
|
inline byte BitReverse(byte value)
|
|
{
|
|
value = ((value & 0xAA) >> 1) | ((value & 0x55) << 1);
|
|
value = ((value & 0xCC) >> 2) | ((value & 0x33) << 2);
|
|
return rotlFixed(value, 4U);
|
|
}
|
|
|
|
inline word16 BitReverse(word16 value)
|
|
{
|
|
value = ((value & 0xAAAA) >> 1) | ((value & 0x5555) << 1);
|
|
value = ((value & 0xCCCC) >> 2) | ((value & 0x3333) << 2);
|
|
value = ((value & 0xF0F0) >> 4) | ((value & 0x0F0F) << 4);
|
|
return ByteReverse(value);
|
|
}
|
|
|
|
inline word32 BitReverse(word32 value)
|
|
{
|
|
value = ((value & 0xAAAAAAAA) >> 1) | ((value & 0x55555555) << 1);
|
|
value = ((value & 0xCCCCCCCC) >> 2) | ((value & 0x33333333) << 2);
|
|
value = ((value & 0xF0F0F0F0) >> 4) | ((value & 0x0F0F0F0F) << 4);
|
|
return ByteReverse(value);
|
|
}
|
|
|
|
inline word64 BitReverse(word64 value)
|
|
{
|
|
#if CRYPTOPP_BOOL_SLOW_WORD64
|
|
return (word64(BitReverse(word32(value))) << 32) | BitReverse(word32(value>>32));
|
|
#else
|
|
value = ((value & W64LIT(0xAAAAAAAAAAAAAAAA)) >> 1) | ((value & W64LIT(0x5555555555555555)) << 1);
|
|
value = ((value & W64LIT(0xCCCCCCCCCCCCCCCC)) >> 2) | ((value & W64LIT(0x3333333333333333)) << 2);
|
|
value = ((value & W64LIT(0xF0F0F0F0F0F0F0F0)) >> 4) | ((value & W64LIT(0x0F0F0F0F0F0F0F0F)) << 4);
|
|
return ByteReverse(value);
|
|
#endif
|
|
}
|
|
|
|
template <class T>
|
|
inline T BitReverse(T value)
|
|
{
|
|
if (sizeof(T) == 1)
|
|
return (T)BitReverse((byte)value);
|
|
else if (sizeof(T) == 2)
|
|
return (T)BitReverse((word16)value);
|
|
else if (sizeof(T) == 4)
|
|
return (T)BitReverse((word32)value);
|
|
else
|
|
{
|
|
assert(sizeof(T) == 8);
|
|
return (T)BitReverse((word64)value);
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
inline T ConditionalByteReverse(ByteOrder order, T value)
|
|
{
|
|
return NativeByteOrderIs(order) ? value : ByteReverse(value);
|
|
}
|
|
|
|
template <class T>
|
|
void ByteReverse(T *out, const T *in, size_t byteCount)
|
|
{
|
|
assert(byteCount % sizeof(T) == 0);
|
|
size_t count = byteCount/sizeof(T);
|
|
for (size_t i=0; i<count; i++)
|
|
out[i] = ByteReverse(in[i]);
|
|
}
|
|
|
|
template <class T>
|
|
inline void ConditionalByteReverse(ByteOrder order, T *out, const T *in, size_t byteCount)
|
|
{
|
|
if (!NativeByteOrderIs(order))
|
|
ByteReverse(out, in, byteCount);
|
|
else if (in != out)
|
|
memcpy_s(out, byteCount, in, byteCount);
|
|
}
|
|
|
|
template <class T>
|
|
inline void GetUserKey(ByteOrder order, T *out, size_t outlen, const byte *in, size_t inlen)
|
|
{
|
|
const size_t U = sizeof(T);
|
|
assert(inlen <= outlen*U);
|
|
memcpy_s(out, outlen*U, in, inlen);
|
|
memset_z((byte *)out+inlen, 0, outlen*U-inlen);
|
|
ConditionalByteReverse(order, out, out, RoundUpToMultipleOf(inlen, U));
|
|
}
|
|
|
|
#ifndef CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
|
|
inline byte UnalignedGetWordNonTemplate(ByteOrder order, const byte *block, const byte *)
|
|
{
|
|
return block[0];
|
|
}
|
|
|
|
inline word16 UnalignedGetWordNonTemplate(ByteOrder order, const byte *block, const word16 *)
|
|
{
|
|
return (order == BIG_ENDIAN_ORDER)
|
|
? block[1] | (block[0] << 8)
|
|
: block[0] | (block[1] << 8);
|
|
}
|
|
|
|
inline word32 UnalignedGetWordNonTemplate(ByteOrder order, const byte *block, const word32 *)
|
|
{
|
|
return (order == BIG_ENDIAN_ORDER)
|
|
? word32(block[3]) | (word32(block[2]) << 8) | (word32(block[1]) << 16) | (word32(block[0]) << 24)
|
|
: word32(block[0]) | (word32(block[1]) << 8) | (word32(block[2]) << 16) | (word32(block[3]) << 24);
|
|
}
|
|
|
|
inline word64 UnalignedGetWordNonTemplate(ByteOrder order, const byte *block, const word64 *)
|
|
{
|
|
return (order == BIG_ENDIAN_ORDER)
|
|
?
|
|
(word64(block[7]) |
|
|
(word64(block[6]) << 8) |
|
|
(word64(block[5]) << 16) |
|
|
(word64(block[4]) << 24) |
|
|
(word64(block[3]) << 32) |
|
|
(word64(block[2]) << 40) |
|
|
(word64(block[1]) << 48) |
|
|
(word64(block[0]) << 56))
|
|
:
|
|
(word64(block[0]) |
|
|
(word64(block[1]) << 8) |
|
|
(word64(block[2]) << 16) |
|
|
(word64(block[3]) << 24) |
|
|
(word64(block[4]) << 32) |
|
|
(word64(block[5]) << 40) |
|
|
(word64(block[6]) << 48) |
|
|
(word64(block[7]) << 56));
|
|
}
|
|
|
|
inline void UnalignedPutWordNonTemplate(ByteOrder order, byte *block, byte value, const byte *xorBlock)
|
|
{
|
|
block[0] = xorBlock ? (value ^ xorBlock[0]) : value;
|
|
}
|
|
|
|
inline void UnalignedPutWordNonTemplate(ByteOrder order, byte *block, word16 value, const byte *xorBlock)
|
|
{
|
|
if (order == BIG_ENDIAN_ORDER)
|
|
{
|
|
if (xorBlock)
|
|
{
|
|
block[0] = xorBlock[0] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[1] = xorBlock[1] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
}
|
|
else
|
|
{
|
|
block[0] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[1] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (xorBlock)
|
|
{
|
|
block[0] = xorBlock[0] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
block[1] = xorBlock[1] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
}
|
|
else
|
|
{
|
|
block[0] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
block[1] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void UnalignedPutWordNonTemplate(ByteOrder order, byte *block, word32 value, const byte *xorBlock)
|
|
{
|
|
if (order == BIG_ENDIAN_ORDER)
|
|
{
|
|
if (xorBlock)
|
|
{
|
|
block[0] = xorBlock[0] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
block[1] = xorBlock[1] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[2] = xorBlock[2] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[3] = xorBlock[3] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
}
|
|
else
|
|
{
|
|
block[0] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
block[1] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[2] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[3] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (xorBlock)
|
|
{
|
|
block[0] = xorBlock[0] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
block[1] = xorBlock[1] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[2] = xorBlock[2] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[3] = xorBlock[3] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
}
|
|
else
|
|
{
|
|
block[0] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
block[1] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[2] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[3] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void UnalignedPutWordNonTemplate(ByteOrder order, byte *block, word64 value, const byte *xorBlock)
|
|
{
|
|
if (order == BIG_ENDIAN_ORDER)
|
|
{
|
|
if (xorBlock)
|
|
{
|
|
block[0] = xorBlock[0] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 7);
|
|
block[1] = xorBlock[1] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 6);
|
|
block[2] = xorBlock[2] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 5);
|
|
block[3] = xorBlock[3] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 4);
|
|
block[4] = xorBlock[4] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
block[5] = xorBlock[5] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[6] = xorBlock[6] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[7] = xorBlock[7] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
}
|
|
else
|
|
{
|
|
block[0] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 7);
|
|
block[1] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 6);
|
|
block[2] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 5);
|
|
block[3] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 4);
|
|
block[4] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
block[5] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[6] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[7] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (xorBlock)
|
|
{
|
|
block[0] = xorBlock[0] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
block[1] = xorBlock[1] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[2] = xorBlock[2] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[3] = xorBlock[3] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
block[4] = xorBlock[4] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 4);
|
|
block[5] = xorBlock[5] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 5);
|
|
block[6] = xorBlock[6] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 6);
|
|
block[7] = xorBlock[7] ^ CRYPTOPP_GET_BYTE_AS_BYTE(value, 7);
|
|
}
|
|
else
|
|
{
|
|
block[0] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 0);
|
|
block[1] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 1);
|
|
block[2] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 2);
|
|
block[3] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 3);
|
|
block[4] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 4);
|
|
block[5] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 5);
|
|
block[6] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 6);
|
|
block[7] = CRYPTOPP_GET_BYTE_AS_BYTE(value, 7);
|
|
}
|
|
}
|
|
}
|
|
#endif // #ifndef CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
|
|
|
|
template <class T>
|
|
inline T GetWord(bool assumeAligned, ByteOrder order, const byte *block)
|
|
{
|
|
#ifndef CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
|
|
if (!assumeAligned)
|
|
return UnalignedGetWordNonTemplate(order, block, (T*)NULL);
|
|
assert(IsAligned<T>(block));
|
|
#endif
|
|
return ConditionalByteReverse(order, *reinterpret_cast<const T *>(block));
|
|
}
|
|
|
|
template <class T>
|
|
inline void GetWord(bool assumeAligned, ByteOrder order, T &result, const byte *block)
|
|
{
|
|
result = GetWord<T>(assumeAligned, order, block);
|
|
}
|
|
|
|
template <class T>
|
|
inline void PutWord(bool assumeAligned, ByteOrder order, byte *block, T value, const byte *xorBlock = NULL)
|
|
{
|
|
#ifndef CRYPTOPP_ALLOW_UNALIGNED_DATA_ACCESS
|
|
if (!assumeAligned)
|
|
return UnalignedPutWordNonTemplate(order, block, value, xorBlock);
|
|
assert(IsAligned<T>(block));
|
|
assert(IsAligned<T>(xorBlock));
|
|
#endif
|
|
*reinterpret_cast<T *>(block) = ConditionalByteReverse(order, value) ^ (xorBlock ? *reinterpret_cast<const T *>(xorBlock) : 0);
|
|
}
|
|
|
|
template <class T, class B, bool A=false>
|
|
class GetBlock
|
|
{
|
|
public:
|
|
GetBlock(const void *block)
|
|
: m_block((const byte *)block) {}
|
|
|
|
template <class U>
|
|
inline GetBlock<T, B, A> & operator()(U &x)
|
|
{
|
|
CRYPTOPP_COMPILE_ASSERT(sizeof(U) >= sizeof(T));
|
|
x = GetWord<T>(A, B::ToEnum(), m_block);
|
|
m_block += sizeof(T);
|
|
return *this;
|
|
}
|
|
|
|
private:
|
|
const byte *m_block;
|
|
};
|
|
|
|
template <class T, class B, bool A=false>
|
|
class PutBlock
|
|
{
|
|
public:
|
|
PutBlock(const void *xorBlock, void *block)
|
|
: m_xorBlock((const byte *)xorBlock), m_block((byte *)block) {}
|
|
|
|
template <class U>
|
|
inline PutBlock<T, B, A> & operator()(U x)
|
|
{
|
|
PutWord(A, B::ToEnum(), m_block, (T)x, m_xorBlock);
|
|
m_block += sizeof(T);
|
|
if (m_xorBlock)
|
|
m_xorBlock += sizeof(T);
|
|
return *this;
|
|
}
|
|
|
|
private:
|
|
const byte *m_xorBlock;
|
|
byte *m_block;
|
|
};
|
|
|
|
template <class T, class B, bool GA=false, bool PA=false>
|
|
struct BlockGetAndPut
|
|
{
|
|
// function needed because of C++ grammatical ambiguity between expression-statements and declarations
|
|
static inline GetBlock<T, B, GA> Get(const void *block) {return GetBlock<T, B, GA>(block);}
|
|
typedef PutBlock<T, B, PA> Put;
|
|
};
|
|
|
|
template <class T>
|
|
std::string WordToString(T value, ByteOrder order = BIG_ENDIAN_ORDER)
|
|
{
|
|
if (!NativeByteOrderIs(order))
|
|
value = ByteReverse(value);
|
|
|
|
return std::string((char *)&value, sizeof(value));
|
|
}
|
|
|
|
template <class T>
|
|
T StringToWord(const std::string &str, ByteOrder order = BIG_ENDIAN_ORDER)
|
|
{
|
|
T value = 0;
|
|
memcpy_s(&value, sizeof(value), str.data(), UnsignedMin(str.size(), sizeof(value)));
|
|
return NativeByteOrderIs(order) ? value : ByteReverse(value);
|
|
}
|
|
|
|
// ************** help remove warning on g++ ***************
|
|
|
|
template <bool overflow> struct SafeShifter;
|
|
|
|
template<> struct SafeShifter<true>
|
|
{
|
|
template <class T>
|
|
static inline T RightShift(T value, unsigned int bits)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
template <class T>
|
|
static inline T LeftShift(T value, unsigned int bits)
|
|
{
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
template<> struct SafeShifter<false>
|
|
{
|
|
template <class T>
|
|
static inline T RightShift(T value, unsigned int bits)
|
|
{
|
|
return value >> bits;
|
|
}
|
|
|
|
template <class T>
|
|
static inline T LeftShift(T value, unsigned int bits)
|
|
{
|
|
return value << bits;
|
|
}
|
|
};
|
|
|
|
template <unsigned int bits, class T>
|
|
inline T SafeRightShift(T value)
|
|
{
|
|
return SafeShifter<(bits>=(8*sizeof(T)))>::RightShift(value, bits);
|
|
}
|
|
|
|
template <unsigned int bits, class T>
|
|
inline T SafeLeftShift(T value)
|
|
{
|
|
return SafeShifter<(bits>=(8*sizeof(T)))>::LeftShift(value, bits);
|
|
}
|
|
|
|
// ************** use one buffer for multiple data members ***************
|
|
|
|
#define CRYPTOPP_BLOCK_1(n, t, s) t* m_##n() {return (t *)(m_aggregate+0);} size_t SS1() {return sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_2(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS1());} size_t SS2() {return SS1()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_3(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS2());} size_t SS3() {return SS2()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_4(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS3());} size_t SS4() {return SS3()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_5(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS4());} size_t SS5() {return SS4()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_6(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS5());} size_t SS6() {return SS5()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_7(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS6());} size_t SS7() {return SS6()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCK_8(n, t, s) t* m_##n() {return (t *)(m_aggregate+SS7());} size_t SS8() {return SS7()+sizeof(t)*(s);} size_t m_##n##Size() {return (s);}
|
|
#define CRYPTOPP_BLOCKS_END(i) size_t SST() {return SS##i();} void AllocateBlocks() {m_aggregate.New(SST());} AlignedSecByteBlock m_aggregate;
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif
|