in.close().
*
* @exception IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
public void close() throws IOException {
reachedEOF = true;
in.close();
}
/**
* Reads the next byte of data from this input stream. The value
* byte is returned as an int in the range
* 0 to 255. If no byte is available
* because the end of the stream has been reached, the value
* -1 is returned. This method blocks until input data
* is available, the end of the stream is detected, or an exception
* is thrown.
*
* This method
* simply performs in.read() and returns the result.
*
* @return the next byte of data, or -1 if the end of the
* stream is reached.
* @exception IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
public int read() throws IOException
{
final byte[] b = new byte[1];
int retVal = read(b, 0, 1);
if (retVal == -1) return -1;
return b[0];
}
/**
* Reads up to byte.length bytes of data from this
* input stream into an array of bytes. This method blocks until some
* input is available.
*
* This method simply performs the call
* read(b, 0, b.length) and returns
* the result. It is important that it does
* not do in.read(b) instead;
* certain subclasses of FilterInputStream
* depend on the implementation strategy actually
* used.
*
* @param b the buffer into which the data is read.
* @return the total number of bytes read into the buffer, or
* -1 if there is no more data because the end of
* the stream has been reached.
* @exception IOException if an I/O error occurs.
* @see java.io.FilterInputStream#read(byte[], int, int)
*/
public int read(byte[] b) throws IOException
{
return read(b, 0, b.length);
}
/**
* Reads up to len bytes of data from this input stream
* into an array of bytes. This method blocks until some input is
* available.
*
* This method simply performs in.read(b, off, len)
* and returns the result.
*
* @param b the buffer into which the data is read.
* @param off the start offset of the data.
* @param len the maximum number of bytes read.
* @return the total number of bytes read into the buffer, or
* -1 if there is no more data because the end of
* the stream has been reached.
* @exception IOException if an I/O error occurs.
* @see java.io.FilterInputStream#in
*/
public int read(byte[] b, int off, int len) throws IOException
{
if (reachedEOF) return -1;
if (xlateMode == XL_PLAIN)
{
int count = 0;
//Write header if appropriate
while (headPtr < headSize && len > 0)
{
b[off++] = head[headPtr++];
count++;
len--;
}
return (len == 0) ? count : count + in.read(b, off, len);
}
//Decrypt and inflate
if (inflater.needsInput() && !decryptChunk())
{
reachedEOF = true;
//Read remaining bytes
int numRead;
try {
numRead = inflater.inflate(b, off, len);
}
catch (Exception e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING, null, e);
return -1;
}
if (!inflater.finished())
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING,
"Inflation imncomplete");
}
return numRead == 0 ? -1 : numRead;
}
try
{
return inflater.inflate(b, off, len);
}
catch (DataFormatException e)
{
Logger.getLogger(SVGConst.SVG_LOGGER).log(Level.WARNING, null, e);
return -1;
}
}
/**
* Call when inflater indicates that it needs more bytes.
* @return - true if we decrypted more bytes to deflate, false if we
* encountered the end of stream
*/
protected boolean decryptChunk() throws IOException
{
while (inflater.needsInput())
{
int numInBytes = in.read(inBuffer);
if (numInBytes == -1) return false;
// int numDecryptBytes = cipher.update(inBuffer, 0, numInBytes, decryptBuffer);
// inflater.setInput(decryptBuffer, 0, numDecryptBytes);
inflater.setInput(inBuffer, 0, numInBytes);
}
return true;
}
/**
* This method returns 1 if we've not reached EOF, 0 if we have. Programs
* should not rely on this to determine the number of bytes that can be
* read without blocking.
*/
public int available() { return reachedEOF ? 0 : 1; }
/**
* Skips bytes by reading them into a cached buffer
*/
public long skip(long n) throws IOException
{
int skipSize = (int)n;
if (skipSize > inBuffer.length) skipSize = inBuffer.length;
return read(inBuffer, 0, skipSize);
}
}
/*
import java.security.KeyPairGenerator;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Cipher;
....
java.security.Security.addProvider(new cryptix.provider.Cryptix());
SecureRandom random = new SecureRandom(SecureRandom.getSeed(30));
KeyPairGenerator keygen = KeyPairGenerator.getInstance("RSA");
keygen.initialize(1024, random);
keypair = keygen.generateKeyPair();
PublicKey pubkey = keypair.getPublic();
PrivateKey privkey = keypair.getPrivate();
*/
/*
*
*Generate key pairs
KeyPairGenerator keyGen =
KeyPairGenerator.getInstance("DSA");
KeyGen.initialize(1024, new SecureRandom(userSeed));
KeyPair pair = KeyGen.generateKeyPair();
*/