--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcryptospi/inc/bigint.h Thu Sep 10 14:01:51 2009 +0300
@@ -0,0 +1,336 @@
+/*
+* Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the License "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+* ** IMPORTANT ** PublishedPartner API's in this file are published to 3rd party developers via the
+* Symbian website. Changes to these API's should be treated as PublishedAll API changes and the Security TA should be consulted.
+*
+*/
+
+
+/**
+ @file
+ @publishedAll
+ @released
+*/
+
+#ifndef __BIGINT_H__
+#define __BIGINT_H__
+
+#include <e32base.h>
+
+
+const TUint KSignMask = 0x1L;
+const TUint KHeapBasedMask = 0x2L;
+const TUint KPtrMask = 0xFFFFFFFCL;
+
+class RInteger;
+
+/**
+ * Abstract base class defining the interface for handling and manipulating big
+ * integers.
+ *
+ * TInteger is capable of representing both negative and positive integers
+ * with an absolute value of less than 2^32^(2^32). To create an integer
+ * look at RInteger.
+ * TInteger defines an interface for the RInteger implementation - it is not
+ * intended that TIntegers be copied or assigned from other TIntegers. On EKA1
+ * platforms, this is possible, but it should be avoided.
+ *
+ *
+ * @see RInteger
+ */
+class TInteger
+ {
+public:
+ /** @internalComponent */
+ enum TRandomAttribute {EAllBitsRandom=0, ETopBitSet=1, ETop2BitsSet=2};
+
+ IMPORT_C HBufC8* BufferLC() const;
+ IMPORT_C TUint WordCount(void) const;
+ IMPORT_C TUint ByteCount(void) const;
+ IMPORT_C TUint BitCount(void) const;
+
+ IMPORT_C static const TInteger& Zero(void);
+ IMPORT_C static const TInteger& One(void);
+ IMPORT_C static const TInteger& Two(void);
+
+ IMPORT_C RInteger PlusL(const TInteger& aOperand) const;
+ IMPORT_C RInteger MinusL(const TInteger& aOperand) const;
+ IMPORT_C RInteger TimesL(const TInteger& aOperand) const;
+ IMPORT_C RInteger DividedByL(const TInteger& aOperand) const;
+ IMPORT_C RInteger DividedByL(TUint aOperand) const;
+ IMPORT_C RInteger ModuloL(const TInteger& aOperand) const;
+ IMPORT_C TUint ModuloL(TUint aOperand) const;
+
+ IMPORT_C RInteger SquaredL(void) const;
+ IMPORT_C RInteger ExponentiateL(const TInteger& aExponent) const;
+ IMPORT_C static RInteger ModularMultiplyL(const TInteger& aA, const TInteger& aB,
+ const TInteger& aModulus);
+ IMPORT_C static RInteger ModularExponentiateL(const TInteger& aBase,
+ const TInteger& aExp, const TInteger& aMod);
+ IMPORT_C RInteger GCDL(const TInteger& aOperand) const;
+ IMPORT_C RInteger InverseModL(const TInteger& aMod) const;
+
+ // These overloaded operator functions leave
+ IMPORT_C TInteger& operator += (const TInteger& aOperand);
+ IMPORT_C TInteger& operator -= (const TInteger& aOperand);
+ IMPORT_C TInteger& operator *= (const TInteger& aOperand);
+ IMPORT_C TInteger& operator /= (const TInteger& aOperand);
+ IMPORT_C TInteger& operator %= (const TInteger& aOperand);
+
+ IMPORT_C TInteger& operator += (TInt aOperand);
+ IMPORT_C TInteger& operator -= (TInt aOperand);
+ IMPORT_C TInteger& operator *= (TInt aOperand);
+ IMPORT_C TInteger& operator /= (TInt aOperand);
+ IMPORT_C TInteger& operator %= (TInt aOperand);
+ IMPORT_C TInteger& operator -- ();
+ IMPORT_C TInteger& operator ++ ();
+
+ IMPORT_C TInteger& operator <<= (TUint aBits);
+ // End of leaving overloaded operator functions
+ IMPORT_C TInteger& operator >>= (TUint aBits);
+
+ IMPORT_C TInt UnsignedCompare(const TInteger& aThat) const;
+ IMPORT_C TInt SignedCompare(const TInteger& aThat) const;
+ IMPORT_C TBool operator ! () const;
+ inline TBool operator == (const TInteger& aInteger) const;
+ inline TBool operator != (const TInteger& aInteger) const;
+ inline TBool operator <= (const TInteger& aInteger) const;
+ inline TBool operator >= (const TInteger& aInteger) const;
+ inline TBool operator < (const TInteger& aInteger) const;
+ inline TBool operator > (const TInteger& aInteger) const;
+
+ IMPORT_C TInt SignedCompare(TInt aThat) const;
+ inline TBool operator == (TInt aInteger) const;
+ inline TBool operator != (TInt aInteger) const;
+ inline TBool operator <= (TInt aInteger) const;
+ inline TBool operator >= (TInt aInteger) const;
+ inline TBool operator < (TInt aInteger) const;
+ inline TBool operator > (TInt aInteger) const;
+
+ inline TBool IsZero() const {return !*this;}
+ inline TBool NotZero() const {return !IsZero();}
+ inline TBool IsNegative() const {return Sign() == ENegative;}
+ inline TBool NotNegative() const {return !IsNegative();}
+ inline TBool IsPositive() const {return NotNegative() && NotZero();}
+ inline TBool NotPositive() const {return !IsPositive();}
+ inline TBool IsEven() const {return Bit(0) == EFalse;}
+ inline TBool IsOdd() const {return Bit(0);}
+
+ IMPORT_C TBool IsPrimeL(void) const;
+
+ IMPORT_C TBool Bit(TUint aBitPos) const;
+ IMPORT_C void SetBit(TUint aBitPos);
+ IMPORT_C void Negate(void);
+
+ IMPORT_C TInt ConvertToLongL(void) const;
+
+ IMPORT_C void CopyL(const TInteger& aInteger, TBool aAllowShrink=ETrue);
+ IMPORT_C void CopyL(const TInt aInteger, TBool aAllowShrink=ETrue);
+ IMPORT_C void Set(const RInteger& aInteger);
+ IMPORT_C HBufC8* BufferWithNoTruncationLC() const;
+
+protected: //Interface functions to algorthims
+ /** @internalComponent */
+ RInteger PositiveAddL(const TInteger& aA, const TInteger& aB) const;
+ /** @internalComponent */
+ RInteger PositiveSubtractL(const TInteger& aA, const TInteger& aB) const;
+ /** @internalComponent */
+ RInteger PositiveMultiplyL(const TInteger& aA, const TInteger& aB) const;
+ /** @internalComponent */
+ void PositiveDivideL(RInteger& aRemainder, RInteger& aQuotient,
+ const TInteger& aDividend, const TInteger& aDivisor) const;
+ /** @internalComponent */
+ void DivideL(RInteger& aRemainder, RInteger& aQuotient,
+ const TInteger& aDividend, const TInteger& aDivisor) const;
+ /** @internalComponent */
+ void PositiveDivide(TUint& aRemainder, TInteger& aQoutient,
+ const TInteger& aDividend, TUint aDivisor) const;
+ /** @internalComponent */
+ void DivideL(TUint& aRemainder, RInteger& aQoutient,
+ const TInteger& aDividend, TUint aDivisor) const;
+ /** @internalComponent */
+ TUint Modulo(const TInteger& aDividend, TUint aDivisor) const;
+
+protected: //Utility functions
+ /** @internalComponent */
+ TInt ConvertToLong(void) const;
+ inline TUint ConvertToUnsignedLong(void) const {return Ptr()[0];}
+ /** @internalComponent */
+ TBool IsConvertableToLong(void) const;
+ /** @internalComponent */
+ void RandomizeL(TUint aBits, TRandomAttribute aAttr);
+ /** @internalComponent */
+ void RandomizeL(const TInteger& aMin, const TInteger& aMax);
+ /** @internalComponent */
+ void PrimeRandomizeL(TUint aBits, TRandomAttribute aAttr);
+ /** @internalComponent */
+ TBool SmallPrimeRandomizeL(void);
+
+protected: //Memory Handling
+ /** @internalComponent */
+ void CreateNewL(TUint aNewSize);
+ /** @internalComponent */
+ void CleanNewL(TUint aNewSize);
+ /** @internalComponent */
+ void CleanGrowL(TUint aNewSize);
+ /** @internalComponent */
+ void CleanResizeL(TUint aNewSize);
+
+protected: //Construction functions
+ IMPORT_C TInteger(void);
+ /** @internalComponent */
+ void Construct(const TDesC8& aValue);
+ /** @internalComponent */
+ void Construct(const TInteger& aInteger);
+ /** @internalComponent */
+ void Construct(TInt aInteger);
+ /** @internalComponent */
+ void Construct(TUint aInteger);
+protected: //Construction functions for stack based integers
+ /** @internalComponent */
+ void ConstructStack(TUint aWords, TUint aInteger);
+ /** @internalComponent */
+ void ConstructStack(TUint aWords, const TInteger& aInteger);
+
+
+protected: //Member data
+ enum TSign {EPositive=0, ENegative=1};
+ TUint iSize;
+ TUint iPtr;
+
+protected: //Hackish functions
+ /* Memory Layout
+ * Word 0: Size -- Must be power of 2 (algorithms assume this)
+ * Word 1: Pointer to storage location plus 2 flag bits in lsb
+ * Word 1 (bit 0): Sign of the integer (+ve == 0, -ve == 1)
+ * Word 1 (bit 1): Heap based flag bit (stack== 0, heap==1)
+ */
+ inline TSign Sign(void) const {return (TSign)(iPtr&KSignMask);}
+ inline TUint Size(void) const {return iSize;}
+ inline void SetSize(TUint aSize) {iSize = aSize;}
+ inline TUint* const Ptr(void) const {return (TUint*)(iPtr&KPtrMask);}
+ inline TBool IsStackBased(void) const {return !IsHeapBased();}
+ inline TBool IsHeapBased(void) const {return iPtr&KHeapBasedMask;}
+ inline void SetPtr(TUint* aPtr) {iPtr &= ~KPtrMask; iPtr |= (TUint)aPtr;}
+ inline void SetHeapBased(void) {iPtr |= KHeapBasedMask;}
+ inline void SetStackBased(void) {iPtr &= ~KHeapBasedMask;}
+ inline void SetSign(TSign aSign) {iPtr &= ~KSignMask; iPtr |= (TUint)aSign;}
+
+private:
+ // disable default copy constructor and assignment operator
+ TInteger(const TInteger& aInteger);
+ TInteger& operator=(const TInteger& aInteger);
+
+ friend class CMontgomeryStructure;
+ friend class RInteger; //in order to have access to Size() for an argument
+ };
+
+// Inline methods for TInteger
+
+inline TBool TInteger::operator == (const TInteger& aInteger) const
+ {
+ return SignedCompare(aInteger) == 0;
+ }
+
+inline TBool TInteger::operator != (const TInteger& aInteger) const
+ {
+ return SignedCompare(aInteger) != 0;
+ }
+
+inline TBool TInteger::operator <= (const TInteger& aInteger) const
+ {
+ return SignedCompare(aInteger) <= 0;
+ }
+
+inline TBool TInteger::operator >= (const TInteger& aInteger) const
+ {
+ return SignedCompare(aInteger) >= 0;
+ }
+
+inline TBool TInteger::operator < (const TInteger& aInteger) const
+ {
+ return SignedCompare(aInteger) < 0;
+ }
+
+TBool TInteger::operator > (const TInteger& aInteger) const
+ {
+ return SignedCompare(aInteger) > 0;
+ }
+
+inline TBool TInteger::operator == (TInt aInteger) const
+ {
+ return SignedCompare(aInteger) == 0;
+ }
+
+inline TBool TInteger::operator != (TInt aInteger) const
+ {
+ return SignedCompare(aInteger) != 0;
+ }
+
+inline TBool TInteger::operator <= (TInt aInteger) const
+ {
+ return SignedCompare(aInteger) <= 0;
+ }
+
+inline TBool TInteger::operator >= (TInt aInteger) const
+ {
+ return SignedCompare(aInteger) >= 0;
+ }
+
+inline TBool TInteger::operator < (TInt aInteger) const
+ {
+ return SignedCompare(aInteger) < 0;
+ }
+
+inline TBool TInteger::operator > (TInt aInteger) const
+ {
+ return SignedCompare(aInteger) > 0;
+ }
+
+
+/**
+ * A TInteger derived class allowing the construction of variable length big integers.
+ * See the Cryptography API guide for further information.
+ *
+ *
+ * @see TInteger
+ */
+class RInteger : public TInteger
+ {
+public:
+ IMPORT_C static RInteger NewL(void);
+ IMPORT_C static RInteger NewL(const TDesC8& aValue);
+ IMPORT_C static RInteger NewL(const TInteger& aInteger);
+ IMPORT_C static RInteger NewL(TInt aInteger);
+ IMPORT_C static RInteger NewL(TUint aInteger);
+ IMPORT_C static RInteger NewEmptyL(TUint aNumWords);
+
+ IMPORT_C static RInteger NewRandomL(TUint aBits,
+ TRandomAttribute aAttr=EAllBitsRandom);
+ IMPORT_C static RInteger NewRandomL(const TInteger& aMin,
+ const TInteger& aMax);
+ IMPORT_C static RInteger NewPrimeL(TUint aBits,
+ TRandomAttribute aAttr=EAllBitsRandom);
+
+ IMPORT_C RInteger(void);
+ IMPORT_C RInteger(const RInteger& aInteger);
+ IMPORT_C RInteger& operator=(const RInteger& aInteger);
+
+ IMPORT_C operator TCleanupItem();
+ IMPORT_C static void CallClose(TAny* aPtr);
+ IMPORT_C void Close(void);
+ };
+
+#endif // __BIGINT_H__