diff -r 000000000000 -r 2c201484c85f crypto/weakcrypto/inc/bigint.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/weakcrypto/inc/bigint.h	Wed Jul 08 11:25:26 2009 +0100
@@ -0,0 +1,343 @@
+/*
+* 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
+ @publishedPartner
+ @released
+*/
+
+#ifndef __BIGINT_H__
+#define __BIGINT_H__
+
+#include <random.h>
+#include <e32base.h>
+
+/** @internalComponent */
+const TUint KSignMask = 0x1L;
+/** @internalComponent */
+const TUint KHeapBasedMask = 0x2L;
+/** @internalComponent */
+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.
+ *
+ * @publishedPartner
+ * @released
+ *
+ * @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__