openikev2::Cipher Class Reference

This abstract class represets a cipher, with methods to encrypt, decrypt, and to compute integrity of byte array. More...

#include <cipher.h>

List of all members.

Public Member Functions
virtual auto_ptr< ByteArray >	encrypt (ByteArray &plain_text, ByteArray &initialization_vector)=0
	Encrypts a plain text using the internal crypto algorithm and the internal key.
virtual auto_ptr< ByteArray >	decrypt (ByteArray &cipher_text, ByteArray &initialization_vector)=0
	Decrypts a cipher text using the internal crypto algorithm and the internal key.
virtual auto_ptr< ByteArray >	computeIntegrity (ByteArray &data_buffer)=0
	Computes the integrity of a data buffer using the internal auth algorithm and the internal key.
virtual auto_ptr< ByteArray >	hmac (ByteArray &data_buffer, ByteArray &hmac_key)=0
	Generates a HMAC value using the internal auth algorithm, a data buffer and a key.
Public Attributes
uint32_t	encr_block_size
	Encryption block size.
uint32_t	integ_hash_size
	Integrity hash size.

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Detailed Description

This abstract class represets a cipher, with methods to encrypt, decrypt, and to compute integrity of byte array.

This class holds internally the keys, so it is no needed to pass them as argument.

Author:

Pedro J. Fernandez Ruiz, Alejandro Perez Mendez <pedroj.fernandez@dif.um.es, alejandro_perez@dif.um.es>

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Member Function Documentation

virtual auto_ptr<ByteArray> openikev2::Cipher::encrypt	(	ByteArray &	plain_text,
		ByteArray &	initialization_vector
	)			[pure virtual]

Encrypts a plain text using the internal crypto algorithm and the internal key.

Parameters:

	plain_text	Plain text to be encrypted. Its size must be multiple of the block size.
	initialization_vector	Initialization vector. Its size must be equal to the block size

Returns:

The resulting cipher text. Its size is equal to the plain text one.

virtual auto_ptr<ByteArray> openikev2::Cipher::decrypt	(	ByteArray &	cipher_text,
		ByteArray &	initialization_vector
	)			[pure virtual]

Decrypts a cipher text using the internal crypto algorithm and the internal key.

Parameters:

	cipher_text	Cipher text to be decrypted. Its size must be multiple of the block size.
	initialization_vector	Initialization vector. Its size must be equal to the block size

Returns:

The resulting plain text. Its size is equal to the cipher text one.

virtual auto_ptr<ByteArray> openikev2::Cipher::computeIntegrity

(

ByteArray &

data_buffer

)

[pure virtual]

Computes the integrity of a data buffer using the internal auth algorithm and the internal key.

Parameters:

data_buffer

Data buffer to compute its integrity

Returns:

Computed integrity data

virtual auto_ptr<ByteArray> openikev2::Cipher::hmac	(	ByteArray &	data_buffer,
		ByteArray &	hmac_key
	)			[pure virtual]

Generates a HMAC value using the internal auth algorithm, a data buffer and a key.

Parameters:

	data_buffer	Data buffer to compute the HMAC value
	hmac_key	Key to compute the HMAC value

Returns:

Computed HMAC value

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