Package software.amazon.encryption.s3.internal

Class CipherInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

software.amazon.awssdk.core.io.SdkFilterInputStream

software.amazon.encryption.s3.internal.CipherInputStream

All Implemented Interfaces:

Closeable, AutoCloseable, software.amazon.awssdk.core.internal.io.Releasable

Direct Known Subclasses:

AuthenticatedCipherInputStream

public class CipherInputStream
extends software.amazon.awssdk.core.io.SdkFilterInputStream

A cipher stream for encrypting or decrypting data using an unauthenticated block cipher.

Field Summary

Fields

Modifier and Type	Field	Description
protected Cipher	cipher
protected int	currentPosition
protected boolean	eofReached
protected byte[]	inputBuffer
protected int	maxPosition
protected byte[]	outputBuffer

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor	Description
CipherInputStream(InputStream inputStream, Cipher cipher)

Method Summary

Modifier and Type	Method	Description
int	available()
void	close()
protected int	endOfFileReached()
void	mark(int readlimit)
boolean	markSupported()
protected int	nextChunk()	Reads and process the next chunk of data into memory.
int	read()
int	read(byte[] buffer)
int	read(byte[] buffer, int off, int targetLength)
void	reset()
long	skip(long n)

Methods inherited from class software.amazon.awssdk.core.io.SdkFilterInputStream

abort, abortIfNeeded, release

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

cipher

protected final Cipher cipher

eofReached

protected boolean eofReached

inputBuffer

protected byte[] inputBuffer

outputBuffer

protected byte[] outputBuffer

currentPosition

protected int currentPosition

maxPosition

protected int maxPosition

Constructor Detail

CipherInputStream

public CipherInputStream(InputStream inputStream,
                         Cipher cipher)

Method Detail

read

public int read()
         throws IOException

Overrides:

read in class software.amazon.awssdk.core.io.SdkFilterInputStream

Throws:

IOException

read

public int read(byte[] buffer)
         throws IOException

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] buffer,
                int off,
                int targetLength)
         throws IOException

Overrides:

read in class software.amazon.awssdk.core.io.SdkFilterInputStream

Throws:

IOException

skip

public long skip(long n)

Note: This implementation will only skip up to the end of the buffered data, potentially skipping 0 bytes.

Overrides:

skip in class software.amazon.awssdk.core.io.SdkFilterInputStream

available

public int available()

Overrides:

available in class software.amazon.awssdk.core.io.SdkFilterInputStream

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class software.amazon.awssdk.core.io.SdkFilterInputStream

Throws:

IOException

markSupported

public boolean markSupported()

Overrides:

markSupported in class software.amazon.awssdk.core.io.SdkFilterInputStream

mark

public void mark(int readlimit)

Overrides:

mark in class software.amazon.awssdk.core.io.SdkFilterInputStream

reset

public void reset()
           throws IOException

Overrides:

reset in class software.amazon.awssdk.core.io.SdkFilterInputStream

Throws:

IOException

nextChunk

protected int nextChunk()
                 throws IOException

Reads and process the next chunk of data into memory.

Returns:

the length of the data chunk read and processed, or -1 if end of stream.

Throws:

IOException - if there is an IO exception from the underlying input stream

endOfFileReached

protected int endOfFileReached()