File	Doc	Category	Size	Date	Package
ConnectionState.java	API Doc	Android 1.5 API	5754	Wed May 06 22:41:06 BST 2009	org.apache.harmony.xnet.provider.jsse

ConnectionState

• java.lang.Object

Fields Summary
protected Cipher	encCipher The cipher used for encode operations
protected Cipher	decCipher The cipher used for decode operations
protected boolean	is_block_cipher The cipher type
protected int	hash_size The size of MAC used under this connection state
protected final byte[]	write_seq_num Write sequence number which is incremented after each encrypt call
protected final byte[]	read_seq_num Read sequence number which is incremented after each decrypt call
protected Logger.Stream	logger

Constructors Summary

Methods Summary
protected byte[]	decrypt(byte type, byte[] fragment) Retrieves the fragment of the Plaintext structure of the specified type from the provided data. param type - the ContentType of the data to be decrypted. param fragment - the byte array containing the data to be encrypted under the current connection state. return decrypt(type, fragment, 0, fragment.length);
protected abstract byte[]	decrypt(byte type, byte[] fragment, int offset, int len) Retrieves the fragment of the Plaintext structure of the specified type from the provided data. param type - the ContentType of the data to be decrypted. param fragment - the byte array containing the data to be encrypted under the current connection state. param offset - the offset from which the data begins with. param len - the length of the data.
protected byte[]	encrypt(byte type, byte[] fragment) Creates the GenericStreamCipher or GenericBlockCipher data structure for specified data of specified type. param type - the ContentType of the provided data param fragment - the byte array containing the data to be encrypted under the current connection state. return encrypt(type, fragment, 0, fragment.length);
protected abstract byte[]	encrypt(byte type, byte[] fragment, int offset, int len) Creates the GenericStreamCipher or GenericBlockCipher data structure for specified data of specified type. param type - the ContentType of the provided data param fragment - the byte array containing the data to be encrypted under the current connection state. param offset - the offset from which the data begins with. param len - the length of the data.
protected int	getContentSize(int generic_cipher_size) Returns the minimal upper bound of the content size enclosed into the Generic[Stream|Generic]Cipher structure of specified size. For stream ciphers the returned value will be exact value. //it does not take the padding of block ciphered structures //into account (so returned value can be greater than actual) return decCipher.getOutputSize(generic_cipher_size)-hash_size;
protected int	getFragmentSize(int content_size) Returns the size of the Generic[Stream|Generic]Cipher structure corresponding to the content data of specified size. return encCipher.getOutputSize(content_size+hash_size);
protected int	getMinFragmentSize() Returns the minimal possible size of the Generic[Stream|Generic]Cipher structure under this connection state. // block ciphers return value with padding included return encCipher.getOutputSize(1+hash_size); // 1 byte for data
protected static void	incSequenceNumber(byte[] seq_num) Increments the sequence number. int octet = 7; while (octet >= 0) { seq_num[octet] ++; if (seq_num[octet] == 0) { // characteristic overflow, so // carrying a number in adding octet --; } else { return; } }
protected void	shutdown() Shutdownes the protocol. It will be impossiblke to use the instance after the calling of this method. encCipher = null; decCipher = null; for (int i=0; i<write_seq_num.length; i++) { write_seq_num[i] = 0; read_seq_num[i] = 0; }