/*

* Copyright (c) 1998-2009 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: 

* Implementation of an attribute type and a value, as defined by the X.520 standard

*

*/

/**

 @file 

 @publishedAll

 @released

*/

#if !defined(__X520AVA_H__)

#define __X520AVA_H__

#include <e32base.h>

#include <e32std.h>

#include <s32std.h>

//these are for internal use only

//these are the only attribute types we handle at present

_LIT(KX520CountryName,"2.5.4.6");

_LIT(KX520OrganizationName,"2.5.4.10");

_LIT(KX520OrganizationalUnitName,"2.5.4.11");

_LIT(KX520LocalityName,"2.5.4.7");

_LIT(KX520StateOrProvinceName,"2.5.4.8");

_LIT(KX520Title,"2.5.4.12");

_LIT(KX520CommonName,"2.5.4.3");

_LIT(KX520GivenName,"2.5.4.42");

_LIT(KX520Surname,"2.5.4.4");

_LIT(KX520Initials,"2.5.4.43");

_LIT(KX520GenerationQualifier,"2.5.4.44");

_LIT(KX520DNQualifier,"2.5.4.46");

_LIT(KX520SerialNumber,"2.5.4.5");

_LIT(KX520Description,"2.5.4.13");

//more attribute types we handle at present

_LIT(KX520PostalCode,"2.5.4.17");

_LIT(KRFC2247DomainComponent, "0.9.2342.19200300.100.1.25");

_LIT(KRFC2256Street,"2.5.4.9");

_LIT(KPKCS9UnstructuredName, "1.2.840.113549.1.9.2");

//email address is deprecated but we support it anyway...

_LIT(KPKCS9EmailAddress, "1.2.840.113549.1.9.1");

/** The maximum length allowed for a country name. */

const TInt KX520MaxCLength = 2;

/** The maximum length allowed for an organization name. */

const TInt KX520MaxOLength = 64;

/** The maximum length allowed for an organizational unit name. */

const TInt KX520MaxOULength = 64;

/** The maximum length allowed for a locality name. */

const TInt KX520MaxLLength = 128;

/** The maximum length allowed for a state or province name. */

const TInt KX520MaxSOPLength = 128;

/** The maximum length allowed for an title. */

const TInt KX520MaxTLength = 64;

/** The maximum length allowed for a common name. */

const TInt KX520MaxCNLength = 256;

/** The maximum length allowed for a given name. */

const TInt KX520MaxGNLength = 16;

/** The maximum length allowed for a surname. */

const TInt KX520MaxSLength = 40;

/** The maximum length allowed for initials. */

const TInt KX520MaxILength = 5;

/** The maximum length allowed for a generation qualifier. */

const TInt KX520MaxGQLength = 3;

/** The maximum length allowed for a serial number. */

const TInt KX520MaxSNLength = 64;

/** The maximum length allowed for a postal code. */

const TInt KX520MaxPostalCodeLength = 40;

/** The maximum length allowed for an email address. */

const TInt KPKCS9MaxEmailAddressLength = 256;

/** The maximum length allowed for an unstructured name. */

const TInt KPKCS9MaxUnstructuredNameLength = 256;

// No maximum was specified in the standard - 128 should be sufficient

/** The maximum length allowed for an RFC 2247 domain component. 

* 

* Each component of the domain name is a short string. */

const TInt KRFC2247MaxDomainComponentLength = 128;

/** The maximum length allowed a for street. */

const TInt KRFC2256StreetLength = 128;

/** The maximum length allowed for an Description field. */

const TInt KX520MaxDescriptionLength = 1024;

/** The attribute type. 

* 

* @since v6.0 */

enum TAttributeType

	{

	/** A common name */

	ECommonName,

	/** A locality name */

	ELocalityName,

	/** A state or province name */

	EStateOrProvinceName,

	/** An organization name */

	EOrganizationName,

	/** An organizational unit name */

	EOrganizationalUnitName,

	/** A title */

	ETitle,

	/** A qualifier */

	EDNQualifier,

	/** The name of a country */

	ECountryName,

	/** A given name */

	EGivenName,

	/** A surname */

	ESurname,

	/** Initials */

	EInitials,

	/** A generation qualifier */

	EGenerationQualifier,

	/** An email address. This is deprecated. */

	EPKCS9EmailAddress,

	/** A postal code */

	EPostalCode,

	/** A serial number */

	ESerialNumber,

	/** An RFC 2247 domain component.

	* 

	* A domain name is made up of an ordered set of components.*/

	ERFC2247DomainComponent,

	/** RFC 2256 street component.

	* 

	* A street */

	ERFC2256Street,

	/** A name of the subject of a certificate as an unstructured ASCII string */

	EPKCS9UnstructuredName,

	/** A Description */

	EX520Description,

	};

class CASN1EncSequence;

class CX520AttributeTypeAndValue : public CBase

/** Contains an attribute type and a value, as defined by the X.520 standard.

* 

* A Distinguished Name object, as defined by the X.500 standard, consists of 

* a sequence of these objects. 

* 

* @since v6.0 

*/

// Attribute and value pair class. Attribute and value pairs 

//	are used in distinguished names and certificate attributes. 

//	Stores data in ASN.1 format internally.

	{

public:

	// Constructs a new object from ASN.1-encoded DER binary data

	/** Creates a new CX520AttributeTypeAndValue object from the specified buffer containing 

	* the encoded binary representation.

	* 

	* Initialises the object from its encoded binary form into an internal representation.	

	* 

	* @param aBinaryData	The encoded binary representation.

	* @return				The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewL(const TDesC8& aBinaryData);

	// Constructs a new object from ASN.1-encoded DER binary data

	/** Creates a new CX520AttributeTypeAndValue object from the specified buffer containing 

	* the encoded binary representation, and puts a pointer to the new object onto 

	* the cleanup stack.

	* 

	* Initialises the object from its encoded binary form into an internal representation.	

	* 

	* @param aBinaryData	The encoded binary representation.

	* @return				The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewLC(const TDesC8& aBinaryData);

	// Constructs a new object from ASN.1-encoded DER binary data

	/** Creates a new CX520AttributeTypeAndValue object from the specified buffer containing 

	* the encoded binary representation, starting at the specified offset.

	* 

	* Initialises the object from its encoded binary form into an internal representation.

	* 

	* @param aBinaryData	The encoded binary representation.

	* @param aPos			The offset position from which to start decoding.

	* @return				The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewL(const TDesC8& aBinaryData, TInt& aPos);

	// Constructs a new object from ASN.1-encoded DER binary data

	/** Creates a new CX520AttributeTypeAndValue object from the specified buffer containing 

	* the encoded binary representation, starting at the specified offset, and puts 

	* a pointer to the new object onto the cleanup stack.

	* 

	* Initialises the object from its encoded binary form into an internal representation.

	* 

	* @param aBinaryData	The encoded binary representation.

	* @param aPos			The offset position from which to start decoding.

	* @return				The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewLC(const TDesC8& aBinaryData, TInt& aPos);

	/** Creates a new CX520AttributeTypeAndValue object from an existing object.

	* 

	* This is equivalent to a copy constructor.

	* 

	* @param aPair	The CX520AttributeTypeAndValue object.

	* @return		The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewL(const CX520AttributeTypeAndValue& aPair);

	/** Creates a new CX520AttributeTypeAndValue object from an existing object, and 

	* puts a pointer to the new object onto the cleanup stack.

	* 

	* This is equivalent to a copy constructor.

	* 

	* @param aPair	The CX520AttributeTypeAndValue object.

	* @return		The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewLC(const CX520AttributeTypeAndValue& aPair);

	/** Creates a new CX520AttributeTypeAndValue object from the specified read stream.

	* 

	* @param aStream	Stream from which the object is to be internalised.

	* @return			The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewL(RReadStream& aStream);

	/** Creates a new CX520AttributeTypeAndValue object from the specified read stream, 

	* and puts a pointer to the new object onto the cleanup stack.

	* 

	* @param aStream	Stream from which the object is to be internalised.

	* @return			The new CX520AttributeTypeAndValue object. */

	IMPORT_C static CX520AttributeTypeAndValue* NewLC(RReadStream& aStream);

	/** Creates a new CX520AttributeTypeAndValue object from an attribute type and value.

	* 

	* @param aType	Attribute type

	* @param aValue	Attribute value

	* @return		New CX520AttributeTypeAndValue object */

	IMPORT_C static CX520AttributeTypeAndValue* NewL(TAttributeType aType, const TDesC8& aValue);

	/** Creates a new CX520AttributeTypeAndValue object from an attribute type and value.

	* 

	* @param aType	Attribute type

	* @param aValue Attribute value

	* @return		New CX520AttributeTypeAndValue object on the cleanup stack */

	IMPORT_C static CX520AttributeTypeAndValue* NewLC(TAttributeType aType, const TDesC8& aValue);

	/** Destructor.

	* 

	* Frees all resources owned by the object, prior to its destruction. */

	IMPORT_C ~CX520AttributeTypeAndValue();

	/** Gets the encoded attribute type of the object.

	* 

	* @return	A pointer descriptor representing the encoded attribute type. */

	IMPORT_C const TPtrC Type() const;

	/** Gets the encoded attribute value of the object.

	* 

	* @return	The pointer descriptor representing the encoded attribute value. */

	IMPORT_C const TPtrC8 EncodedValue() const;

	// Creates a copy of object's ASN.1 DER encoding.

	// @return	New buffer containing object's ASN.1 DER encoding.

	/** Gets the decoded value.

	* 

	* @return	A heap descriptor containing the decoded value. */

	IMPORT_C virtual HBufC* ValueL() const;

	/** Encodes the contents into an ASN.1 sequence object.

	* 

	* This is useful to insert attribute type/value pairs into other ASN.1 

	* encoding trees.

	* 

	* @return	New ASN.1 sequence object containing attribute 

	* 			type/value pair in for of an OID and an octet string; 

	*			leaves the returned object on the cleanup stack. */

	IMPORT_C CASN1EncSequence* EncodeASN1LC() const;

	/** Encodes the contents into an ASN.1 sequence object.

	* 

	* Useful to insert attribute type/value pairs into other ASN.1 

	* encoding trees.

	* 

	* @return 	New ASN.1 sequence object containing attribute 

	* 			type/value pair in for of an OID and an octet string. */

	IMPORT_C CASN1EncSequence* EncodeASN1L() const;

	// This function compares the current element with aElement.

	/** Compares the attribute type and decoded value of the specified object.

	* 

	* @param aElement	The CX520AttributeTypeAndValue object to be compared.

	* @return 			ETrue, if the attribute types and the decoded values match; 

	* 					EFalse, otherwise. */

	IMPORT_C virtual TBool ExactMatchL(const CX520AttributeTypeAndValue& 

		aElement) const;

	/** Externalises an object of this class to a write stream.

	* 

	* The presence of this function means that the standard templated operator<<() 

	* can be used to externalise objects of this class.

	* 

	* @param aStream	Stream to which the object should be externalised. */

	virtual void ExternalizeL(RWriteStream& aStream) const;

private:

	virtual void InternalizeL(RReadStream& aStream);

	CX520AttributeTypeAndValue(const TAttributeType aType);

	CX520AttributeTypeAndValue(); ///< Protected default constructor

	void ConstructL(const CX520AttributeTypeAndValue& aPair);

	void ConstructL(const TDesC8& aBinaryData, TInt& aPos);

	void ConstructL(TAttributeType aType, const TDesC8& aValue);

	/**

     * This method finds out if case-insensitive comparisons must be done or not.

	 * Email Address is the exceptional case of 'IA5String' value type for which comparisons must be

	 * done case-insensitivly.

	 * 

	 * @param aSource	contains the encoded value of the attribute type.

 	 * @return	    	ETrue, if case-insensitive comparisons are to be done. 

	 * 		        	This is only when value type is a Printable String OR if attribute type is an Email Address. 

	 * 		        	EFalse, otherwise.

 	 */ 

 	TBool IsCaseInSensitiveL(const TDesC8& aSource) const;

	HBufC* iType; ///< The encoded type

	HBufC8* iValue; ///< The encoded value

	};

#endif