sl@0: /*
sl@0: * Copyright (c) 2001-2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: * All rights reserved.
sl@0: * This component and the accompanying materials are made available
sl@0: * under the terms of the License "Eclipse Public License v1.0"
sl@0: * which accompanies this distribution, and is available
sl@0: * at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: *
sl@0: * Initial Contributors:
sl@0: * Nokia Corporation - initial contribution.
sl@0: *
sl@0: * Contributors:
sl@0: *
sl@0: * Description: 
sl@0: * Declares all classes used to decode ASN.1 data, including the 
sl@0: * base interface.
sl@0: *
sl@0: */
sl@0: 
sl@0: 
sl@0: /**
sl@0:  @file
sl@0:  @publishedAll
sl@0:  @released
sl@0: */
sl@0: 
sl@0: #ifndef __ASN1ENC_H__
sl@0: #define __ASN1ENC_H__
sl@0: 
sl@0: #include <e32base.h>
sl@0: #include <asn1cons.h>
sl@0: 
sl@0: class CASN1EncBase;
sl@0: class TASN1EncBase128DER;
sl@0: 
sl@0: class TInteger;
sl@0: 
sl@0: typedef void (CASN1EncBase::* WriteFunc)(TDes8& aBuf) const;
sl@0: 
sl@0: /**
sl@0:  * Base class for all ASN.1 types that we can encode.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncBase : public CBase
sl@0: 	{
sl@0: public:
sl@0: 	/**
sl@0: 	 * Gives total number of octets in the DER encoding of this 
sl@0: 	 * object.
sl@0: 	 * @return Number of octets in DER encoding of this object.
sl@0: 	 */
sl@0: 	IMPORT_C TUint LengthDER() const;
sl@0: 	
sl@0: 	/**
sl@0: 	 * Writes entire DER encoding of this object into the given 
sl@0: 	 * buffer.
sl@0: 	 * @param aBuf Buffer receiving the encoding.
sl@0: 	 * @param aPos Position to start writing at.
sl@0: 	 */
sl@0: 	IMPORT_C void WriteDERL(TDes8& aBuf, TUint& aPos) const;
sl@0: 
sl@0: 	/**
sl@0: 	 * Sets tag type/class of the encoding object
sl@0: 	 * @param aType Tag type to set
sl@0: 	 * @param aClass Tag class to set.
sl@0: 	 */
sl@0: 	IMPORT_C void SetTag(const TTagType aType,
sl@0: 		const TASN1Class aClass = EContextSpecific);
sl@0: 
sl@0: 	IMPORT_C ~CASN1EncBase();
sl@0: 
sl@0: 	/**
sl@0: 	 * @internalComponent
sl@0: 	 * 
sl@0: 	 * Sets parent for the object
sl@0: 	 * @param aParent Pointer to an ASN.1 object that becomes this 
sl@0: 	 *     object's parent.
sl@0: 	 */
sl@0: 	void SetParent(CASN1EncBase* aParent);
sl@0: 
sl@0: protected:
sl@0: 	/**
sl@0: 	 * Protected constructor
sl@0: 	 * @param aType Tag type of the new object
sl@0: 	 * @param aClass Tag class of the new object.
sl@0: 	 */
sl@0: 	IMPORT_C CASN1EncBase(const TTagType aType, const TASN1Class aClass);
sl@0: 
sl@0: 	/** 
sl@0: 	 * Must call this version from derived classes in their 
sl@0: 	 * ConstructL, but only once they're ready to have 
sl@0: 	 * CalculateContentsLengthDER called on them.
sl@0: 	 */
sl@0: 	IMPORT_C virtual void ConstructL();
sl@0: 
sl@0: 	/**
sl@0: 	 * @internalComponent
sl@0: 	 *
sl@0: 	 * Derived classes must call this if the length of their 
sl@0: 	 * contents changes after construction.
sl@0: 	 */
sl@0: 	void ContentsLengthChanged();
sl@0: 
sl@0: protected:
sl@0: 	/** 
sl@0: 	 * @internalComponent
sl@0: 	 * 
sl@0: 	 * Calculates number of octets in DER length encoding. Must set 
sl@0: 	 * value of the appropriate data member. Made protected because it is 
sl@0: 	 * needed by CASN1EncEncoding class.
sl@0: 	 */
sl@0: 	void CalculateLengthLengthDER();
sl@0: 
sl@0: private:
sl@0: 	/** 
sl@0: 	 * Calculates number of octets in DER tag encoding. Must set 
sl@0: 	 * value of the appropriate data member.
sl@0: 	 */
sl@0: 	void CalculateTagLengthDER();
sl@0: 
sl@0: 	/** 
sl@0: 	 * Calculates number of octets in DER content encoding. Must set 
sl@0: 	 * value of the appropriate data member.
sl@0: 	 */
sl@0: 	virtual void CalculateContentsLengthDER() = 0;
sl@0: 
sl@0: 	virtual TBool IsConstructed() const = 0;
sl@0: 	
sl@0: 	// Write the octet data in each section
sl@0: 	// Note that buffer *will* be big enough: these are called only 
sl@0: 	// after checking.
sl@0: 
sl@0: 	/** 
sl@0: 	 * Writes DER tag encoding into supplied buffer, which is 
sl@0: 	 * already verified to be big enough.
sl@0: 	 * @param aBuf Buffer to write to.
sl@0: 	 */
sl@0: 	void WriteTagDERL(TDes8& aBuf) const;
sl@0: 
sl@0: 	/** 
sl@0: 	 * Writes DER length encoding into supplied buffer, which is 
sl@0: 	 * already verified to be big enough.
sl@0: 	 * @param aBuf Buffer to write to.
sl@0: 	 */
sl@0: 	virtual void WriteLengthDER(TDes8& aBuf) const;
sl@0: 
sl@0: 	/** 
sl@0: 	 * Writes DER content encoding into supplied buffer, which is 
sl@0: 	 * already verified to be big enough. Must be implemented by 
sl@0: 	 * derived classes.
sl@0: 	 * @param aBuf Buffer to write to.
sl@0: 	 */
sl@0: 	virtual void WriteContentsDERL(TDes8& aBuf) const = 0;
sl@0: 
sl@0: 	/** 
sl@0: 	 * Helper function, used for efficiency
sl@0: 	 * @param aBuf Buffer to write to
sl@0: 	 * @param aPos Position in the buffer to start writing at 
sl@0: 	 *     (updated on exit)
sl@0: 	 * @param aLength Length of data to write
sl@0: 	 * @param aWriteFunc Points to the function used to perform 
sl@0: 	 *     the actual write operation.
sl@0: 	 */
sl@0: 	void WriteHelperL(TDes8& aBuf, TUint& aPos, const TUint aLength,
sl@0: 		WriteFunc aWriteFunc) const;
sl@0: 
sl@0: protected:
sl@0: 	// Cached length data - data set from the CalculateXxxx methods above
sl@0: 	TUint iTagLengthDER; ///< Length of DER encoded tag
sl@0: 	TUint iLengthLengthDER; ///< Length of DER encoded length
sl@0: 	TUint iContentsLengthDER; ///< Length of DER encoded content
sl@0: 
sl@0: private:
sl@0: 	/** 
sl@0: 	 * The object owning this one (if we're held in a sequence, 
sl@0: 	 * for example).
sl@0: 	 */
sl@0: 	CASN1EncBase* iParent;
sl@0: 
sl@0: 	// Tag data
sl@0: 	TTagType iType; ///< Tag type of this object
sl@0: 	TASN1Class iClass; ///< Tag class of this object
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Base class for all ASN1 constructed-type objects.  Most of these 
sl@0:  * are container classes, but another type is the explicit-tagging 
sl@0:  * wrapper object.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncConstructed : public CASN1EncBase
sl@0: 	{
sl@0: protected:
sl@0: 	/** 
sl@0: 	 * @internalComponent
sl@0: 	 * 
sl@0: 	 * Protected constructor
sl@0: 	 * @param aType Tag type for the new object
sl@0: 	 * @param aClass Tag class for the new object.
sl@0: 	 */
sl@0: 	CASN1EncConstructed(const TTagType aType, const TASN1Class aClass);
sl@0: 
sl@0: private:
sl@0: 	virtual const CASN1EncBase& Child(const TUint aIndex) const = 0;
sl@0: 	virtual TUint NumChildren() const = 0;
sl@0: 
sl@0: private:
sl@0: 	// From CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	TBool IsConstructed() const;
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class used to wrap other encoding objects in order to give 
sl@0:  * them an explicit tag.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncExplicitTag : public CASN1EncConstructed
sl@0: 	{
sl@0: public:
sl@0: 	/** 
sl@0: 	 * Takes ownership of the encoder, *including* the case when
sl@0: 	 * this method leaves.
sl@0: 	 * @param aEncoder ASN.1 encoding object to wrap
sl@0: 	 * @param aType Tag type to assign
sl@0: 	 * @param aClass Tag class to assign
sl@0: 	 * @return Wrapped encoding object pushed on the cleanup stack.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncExplicitTag* NewLC(CASN1EncBase* aEncoder,
sl@0: 		const TTagType aType, const TASN1Class aClass = EContextSpecific);
sl@0: 
sl@0: 	/** 
sl@0: 	 * Takes ownership of the encoder, *including* the case when
sl@0: 	 * this method leaves.
sl@0: 	 * @param aEncoder ASN.1 encoding object to wrap
sl@0: 	 * @param aType Tag type to assign
sl@0: 	 * @param aClass Tag class to assign
sl@0: 	 * @return Wrapped encoding object.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncExplicitTag* NewL(CASN1EncBase* aEncoder,
sl@0: 		const TTagType aType, const TASN1Class aClass = EContextSpecific);
sl@0: 
sl@0: 	IMPORT_C ~CASN1EncExplicitTag(); // virtual from base
sl@0: 
sl@0: private:
sl@0: 	CASN1EncExplicitTag(CASN1EncBase* aEncoder, const TTagType aType, 
sl@0: 		const TASN1Class aClass);
sl@0: 
sl@0: 	// From CASN1EncConstructed
sl@0: 	TUint NumChildren() const;
sl@0: 	const CASN1EncBase& Child(const TUint aIndex) const;
sl@0: 
sl@0: private:
sl@0: 	CASN1EncBase* iEncoder;  // Inner encoding object
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Base class for all ASN1 container types - sequences, 
sl@0:  * sets, etc.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncContainer : public CASN1EncConstructed
sl@0: 	{
sl@0: public:
sl@0: 	/** 
sl@0: 	 * Call this to add a child object to the container.
sl@0: 	 * Takes ownership if and only if it doesn't Leave.
sl@0: 	 * Checks for null input, calls AddChildInt, calls 
sl@0: 	 * ContentsLengthChanged().
sl@0: 	 * @param aChild Child ASN1 encoding object to add.
sl@0: 	 */
sl@0: 	IMPORT_C void AddChildL(CASN1EncBase* aChild);
sl@0: 
sl@0: 	/** 
sl@0: 	 * Call this to add a child object to the container.
sl@0: 	 * Takes ownership if and only if it doesn't Leave.
sl@0: 	 * Checks for null input, calls AddChildInt, calls 
sl@0: 	 * ContentsLengthChanged(). Pops added child object 
sl@0: 	 * off the cleanup stack.
sl@0: 	 * @param aChild Child ASN1 encoding object to add.
sl@0: 	 */
sl@0: 	IMPORT_C void AddAndPopChildL(CASN1EncBase* aChild);
sl@0: 
sl@0: protected:
sl@0: 	/** @internalComponent */
sl@0: 	CASN1EncContainer(const TTagType aType);
sl@0: 
sl@0: private:
sl@0: 	/** 
sl@0: 	 * Internal method, derived classes implement to add a child.
sl@0: 	 * No need to check for null input or call 
sl@0: 	 * ContentsLengthChanged(). Takes ownership, but only if you 
sl@0: 	 * don't leave.
sl@0: 	 * @param aChild Child encoding object to add.
sl@0: 	 */
sl@0: 	virtual void AddChildIntL(const CASN1EncBase* aChild) = 0;
sl@0: 	};
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding SEQUENCE and SEQUENCE-OF data types.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncSequence : public CASN1EncContainer
sl@0: 	{
sl@0: public:
sl@0: 	IMPORT_C static CASN1EncSequence* NewL();
sl@0: 	IMPORT_C static CASN1EncSequence* NewLC();
sl@0: 
sl@0: 	IMPORT_C ~CASN1EncSequence(); // virtual from base
sl@0: 
sl@0: protected:
sl@0: 	/** @internalComponent */ 
sl@0: 	CASN1EncSequence();
sl@0: 
sl@0: private:
sl@0: 	// From CASN1EncContainer
sl@0: 	const CASN1EncBase& Child(const TUint aIndex) const;
sl@0: 	void AddChildIntL(const CASN1EncBase* aChild);
sl@0: 	TUint NumChildren() const;
sl@0: 
sl@0: private:
sl@0: 	RPointerArray<CASN1EncBase> iChildren;
sl@0: 	};
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding SET and SET-OF data types.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncSet : public CASN1EncContainer
sl@0: 	{
sl@0: public:
sl@0: 	/**
sl@0: 	Creates an ASN.1 Set encoder.
sl@0: 	@return The fully constructed object.
sl@0: 	*/
sl@0: 	IMPORT_C static CASN1EncSet* NewL();
sl@0: 
sl@0: 	/**
sl@0: 	Creates an ASN.1 Set encoder, and puts it onto the cleanup stack.
sl@0: 	@return The fully constructed object.
sl@0: 	*/
sl@0: 	IMPORT_C static CASN1EncSet* NewLC();
sl@0: 
sl@0: 	/**
sl@0: 	Destructor.
sl@0: 	*/
sl@0: 	IMPORT_C ~CASN1EncSet(); // virtual from base
sl@0: 
sl@0: protected:
sl@0: 	/**
sl@0: 	 * @internalComponent
sl@0: 	 * 
sl@0: 	 * Constructor
sl@0: 	 */
sl@0: 	CASN1EncSet();
sl@0: 
sl@0: private:
sl@0: 	// From CASN1EncContainer
sl@0: 	const CASN1EncBase& Child(const TUint aIndex) const;
sl@0: 	void AddChildIntL(const CASN1EncBase* aChild);
sl@0: 	TUint NumChildren() const;
sl@0: 
sl@0: private:
sl@0: 	RPointerArray<CASN1EncBase> iChildren;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: 
sl@0: /**
sl@0:  * All ASN1 primitive type encoding classes derive from here.
sl@0:  *
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncPrimitive : public CASN1EncBase
sl@0: 	{
sl@0: protected:
sl@0: 	IMPORT_C CASN1EncPrimitive(const TTagType aType);
sl@0: 
sl@0: private:
sl@0: 	TBool IsConstructed() const; ///< Inherited from CASN1EncBase
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding NULLs.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncNull : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	IMPORT_C static CASN1EncNull* NewL();
sl@0: 	IMPORT_C static CASN1EncNull* NewLC();
sl@0: 
sl@0: private:
sl@0: 	CASN1EncNull();
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER() ;
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding Boolean values.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncBoolean : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	IMPORT_C static CASN1EncBoolean* NewLC(const TBool aBool);
sl@0: 	IMPORT_C static CASN1EncBoolean* NewL(const TBool aBool);
sl@0: 
sl@0: private:
sl@0: 	CASN1EncBoolean(const TBool aBool);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER() ;
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: 	const TBool iBool;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding TInts only. Use CASN1EncBigInt for encoding 
sl@0:  * Big Integer objects.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncInt : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	IMPORT_C static CASN1EncInt* NewLC(const TInt aInt);
sl@0: 	IMPORT_C static CASN1EncInt* NewL(const TInt aInt);
sl@0: 
sl@0: private:
sl@0: 	CASN1EncInt(const TInt aInt);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER() ;
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	const TInt iInt;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding Big Integer objects only - use CASN1EncInt 
sl@0:  * for TInts.
sl@0:  *
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncBigInt : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	// Takes a deep copy
sl@0: 	IMPORT_C static CASN1EncBigInt* NewLC(const TInteger& aInteger);
sl@0: 	IMPORT_C static CASN1EncBigInt* NewL(const TInteger& aInteger);
sl@0: 
sl@0: 	IMPORT_C ~CASN1EncBigInt(); // virtual from base
sl@0: 
sl@0: private:
sl@0: 	CASN1EncBigInt();
sl@0: 	void ConstructL(const TInteger& aInteger);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	HBufC8* iContents;
sl@0: 	TPtrC8 iWriteContents;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding octet strings.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncOctetString : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	// Takes a deep copy
sl@0: 	IMPORT_C static CASN1EncOctetString* NewLC(const TDesC8& aStr);
sl@0: 	IMPORT_C static CASN1EncOctetString* NewL(const TDesC8& aStr);
sl@0: 
sl@0: 	IMPORT_C ~CASN1EncOctetString(); // virtual from base
sl@0: 
sl@0: private:
sl@0: 	CASN1EncOctetString();
sl@0: 	void ConstructL(const TDesC8& aStr);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	HBufC8* iContents;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding printable strings.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncPrintableString : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	/**
sl@0: 	Creates an ASN.1 Printable String encoder, and puts it onto the cleanup stack.
sl@0: 	@return The fully constructed object.
sl@0: 	*/
sl@0: 	IMPORT_C static CASN1EncPrintableString* NewLC(const TDesC8& aStr);
sl@0: 
sl@0: 	/**
sl@0: 	Creates an ASN.1 Printable String encoder.
sl@0: 	@return The fully constructed object.
sl@0: 	*/
sl@0: 	IMPORT_C static CASN1EncPrintableString* NewL(const TDesC8& aStr);
sl@0: 
sl@0: 	/**
sl@0: 	Destructor.
sl@0: 	*/
sl@0: 	IMPORT_C ~CASN1EncPrintableString(); // virtual from base
sl@0: 
sl@0: private:
sl@0: 	CASN1EncPrintableString();
sl@0: 	void ConstructL(const TDesC8& aStr);
sl@0: 	TInt CheckValid(const TDesC8& aStr);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	HBufC8* iContents;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /**
sl@0:  * Class for encoding bit strings (keys, for example).
sl@0:  *
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncBitString : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	/** 
sl@0: 	 * Constructs a new DER bit string encoder from a bit string that 
sl@0: 	 * does not have unused bits at the end, i.e. is octet-aligned. 
sl@0: 	 * The passed string must be in big-endian format. 
sl@0: 	 * @param aBitStr	Octet-aligned bit string.
sl@0: 	 * @return			A new DER bit string encoder object, 
sl@0: 	 *					which is left on the cleanup stack.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncBitString* NewLC(const TDesC8& aBitStr);
sl@0: 
sl@0: 	/** 
sl@0: 	 * Constructs a new DER bit string encoder from a bit string that 
sl@0: 	 * does not have unused bits at the end, i.e. is octet-aligned. 
sl@0: 	 * The passed string must be in big-endian format. 
sl@0: 	 * @param aBitStr	Octet-aligned bit string.
sl@0: 	 * @return			A new DER bit string encoder object.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncBitString* NewL(const TDesC8& aBitStr);
sl@0: 	
sl@0: 	/** 
sl@0: 	 * Constructs a new DER bit string encoder from a bit string that 
sl@0: 	 * is not octet-aligned, which means it has unused bits in its last 
sl@0: 	 * octet. The passed string must be in big-endian format.
sl@0: 	 * @param aBitStr		Bit string.
sl@0: 	 * @param aLengthBits	Length in bits of the passed bit string. 
sl@0: 	 *     					The function will panic if aLengthBits is greater than 
sl@0: 	 *     					the actual bit length of aBitString, or the difference 
sl@0: 	 *     					is more that 7 bits.
sl@0: 	 * @return				A new DER bit string encoder object which is left on the 
sl@0: 	 *						cleanup stack.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncBitString* NewLC(const TDesC8& aBitStr, TUint aLengthBits);
sl@0: 	
sl@0: 	/** 
sl@0: 	 * Constructs a new DER bit string encoder from a bit string that 
sl@0: 	 * is not octet-aligned, which means it has unused bits in its last 
sl@0: 	 * octet. The passed string must be in big-endian format.
sl@0: 	 * @param aBitStr		Bit string.
sl@0: 	 * @param aLengthBits	Length in bits of the passed bit string. 
sl@0: 	 *     					The function will panic if aLengthBits is greater than 
sl@0: 	 *     					the actual bit length of aBitString, or the difference 
sl@0: 	 *     					is more that 7 bits.
sl@0: 	 * @return				A new DER bit string encoder object.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncBitString* NewL(const TDesC8& aBitStr, TUint aLengthBits);
sl@0: 
sl@0: 	/**
sl@0: 	 * Wraps the passed encoding object into a bit string.
sl@0: 	 * @param aAsnObj	Encoding object to wrap.
sl@0: 	 * @return			A new bit string containing the passed encoding object.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncBitString* NewL(const CASN1EncBase& aAsnObj);
sl@0: 
sl@0: 	/**
sl@0: 	 * Wraps the passed encoding object into a bit string.
sl@0: 	 * @param aAsnObj	Encoding object to wrap.
sl@0: 	 * @return			A new bit string containing the passed encoding object
sl@0: 	 *     				on the cleanup stack.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncBitString* NewLC(const CASN1EncBase& aAsnObj);
sl@0: 	
sl@0: 	IMPORT_C ~CASN1EncBitString(); // virtual from base
sl@0: 
sl@0: private:
sl@0: 	CASN1EncBitString();
sl@0: 	void ConstructL(const TDesC8& aBitStr);
sl@0: 	void ConstructL(const TDesC8& aBitStr, TUint aLengthBits);
sl@0: 	void ConstructL(const CASN1EncBase& aAsnObj);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	HBufC8* iContents;
sl@0: 	TUint8 iPadding;
sl@0: 	};
sl@0: 
sl@0: /**
sl@0:  * Class for encoding object identifiers.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncObjectIdentifier : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	/** 
sl@0: 	 * Takes ints in a string, delimited by '.' characters in 
sl@0: 	 * between (not at ends). Takes a deep copy of the info.
sl@0: 	 * @param aStr	OID string.
sl@0: 	 * @return		New ASN.1 OID object on the cleanup stack.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncObjectIdentifier* NewLC(const TDesC& aStr);
sl@0: 
sl@0: 	/** 
sl@0: 	 * Takes ints in a string, delimited by '.' characters in 
sl@0: 	 * between (not at ends). Takes a deep copy of the info.
sl@0: 	 * @param aStr	OID string.
sl@0: 	 * @return		New ASN.1 OID object.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncObjectIdentifier* NewL(const TDesC& aStr);
sl@0: 
sl@0: 	/** Destructor */
sl@0: 	IMPORT_C ~CASN1EncObjectIdentifier(); // virtual from base
sl@0: 
sl@0: private:
sl@0: 	CASN1EncObjectIdentifier();
sl@0: 	void ConstructL(const TDesC& aStr);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	// Data to encode
sl@0: 	RArray<TASN1EncBase128DER> iData;
sl@0: 	TUint8 iFirstOctet;
sl@0: 	};
sl@0: 
sl@0: 
sl@0: /** 
sl@0:  * Class for encoding GeneralisedTime objects. 
sl@0:  *
sl@0:  * Doesn't support fractions of seconds or regional time zone offsets.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncGeneralizedTime : public CASN1EncPrimitive
sl@0: 	{
sl@0: public:
sl@0: 	IMPORT_C static CASN1EncGeneralizedTime* NewLC(const TTime& aTime);
sl@0: 	IMPORT_C static CASN1EncGeneralizedTime* NewL(const TTime& aTime);
sl@0: 
sl@0: private:
sl@0: 	CASN1EncGeneralizedTime(const TTime& aTime);
sl@0: 
sl@0: 	// Methods from CASN1EncBase
sl@0: 	void CalculateContentsLengthDER();
sl@0: 	void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: private:
sl@0: 	TDateTime iDateTime;
sl@0: 	};
sl@0: 
sl@0: /** 
sl@0:  * Class for encapsulation of already encoded data. 
sl@0:  *
sl@0:  * Wraps it so that the data could be used in the ASN.1 hierarchy. 
sl@0:  * It reverse-engineers and stores the encoded data, providing whatever 
sl@0:  * information is needed to override pure virtual methods of the base 
sl@0:  * class and write out the DER encoding in its initial form.
sl@0:  * 
sl@0:  * @publishedAll
sl@0:  * @released
sl@0:  */
sl@0: class CASN1EncEncoding : public CASN1EncBase
sl@0: 	{
sl@0: public:
sl@0: 	/** 
sl@0: 	 * Creates a new object from raw DER encoding and places it on the 
sl@0: 	 * cleanup stack.
sl@0: 	 * @param aEncoding	Raw DER encoding.
sl@0: 	 * @return			New wrapper object placed on the cleanup stack.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncEncoding* NewLC(const TDesC8& aEncoding);
sl@0: 
sl@0: 	/** 
sl@0: 	 * Creates a new object from raw DER encoding.
sl@0: 	 * @param aEncoding	Raw DER encoding.
sl@0: 	 * @return			New wrapper object.
sl@0: 	 */
sl@0: 	IMPORT_C static CASN1EncEncoding* NewL(const TDesC8& aEncoding);
sl@0: 
sl@0: 	IMPORT_C static CASN1EncEncoding* NewLC(const TDesC8& aEncoding, TTagType aType, TASN1Class aClass);
sl@0: 
sl@0: 	IMPORT_C ~CASN1EncEncoding();
sl@0: 
sl@0: protected:
sl@0: 	/** 
sl@0: 	 * Protected constructor.
sl@0: 	 * <!--
sl@0: 	 * @param aType		Tag type of the new object
sl@0: 	 * @param aClass	Tag class of the new object.
sl@0: 	 * -->
sl@0: 	 */
sl@0: 	IMPORT_C CASN1EncEncoding();
sl@0: 
sl@0: private:
sl@0: 	/** 
sl@0: 	 * Constructs the wrapper around the passed raw DER encoding. 
sl@0: 	 * Calculates element sizes. Decodes it to get type and length.
sl@0: 	 * @param aEncoding Raw DER encoding.
sl@0: 	 */
sl@0: 	void ConstructL(const TDesC8& aEncoding);
sl@0: 
sl@0: 	void ConstructL(const TDesC8& aEncoding, TTagType aType, TASN1Class aClass);
sl@0: 
sl@0: 	virtual TBool IsConstructed() const;
sl@0: 	
sl@0: 	/** 
sl@0: 	 * Writes DER content encoding into supplied buffer, which is 
sl@0: 	 * already verified to be big enough.
sl@0: 	 * @param aBuf	Buffer to write to.
sl@0: 	 */
sl@0: 	virtual void WriteContentsDERL(TDes8& aBuf) const;
sl@0: 
sl@0: 	/** 
sl@0: 	 * Calculates number of octets in DER content encoding. Sets 
sl@0: 	 * value of the appropriate data member.
sl@0: 	 */
sl@0: 	virtual void CalculateContentsLengthDER();
sl@0: 
sl@0: private:
sl@0: 	HBufC8* iContents; ///< Copy of the supplied DER encoded data (contents only).
sl@0: 	TASN1Class iClass; ///< ASN.1 class of the encoded object.
sl@0: 	TTagType iTag; ///< ASN.1 tag of the encoding.
sl@0: 	};
sl@0: 
sl@0: #endif // __ASN1ENC_H__