javax.crypto
Class CipherInputStream
- Closeable
This is an
InputStream that filters its data
through a
Cipher before returning it. The
Cipher
argument must have been initialized before it is passed to the
constructor.
int | available()- Returns the number of bytes available without blocking.
|
void | close()- Close this input stream.
|
void | mark(int mark)- Set the mark.
|
boolean | markSupported()- Returns whether or not this input stream supports the
mark(long) and reset() methods; this input stream does
not, however, and invariably returns false.
|
int | read()- Read a single byte from this input stream; returns -1 on the
end-of-file.
|
int | read(byte[] buf)- Read bytes into an array, returning the number of bytes read or -1
on the end-of-file.
|
int | read(byte[] buf, int off, int len)- Read bytes into an array, returning the number of bytes read or -1
on the end-of-file.
|
void | reset()- Reset to the mark.
|
long | skip(long bytes)- Skip a number of bytes.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
CipherInputStream
protected CipherInputStream(InputStream in)
Creates a new input stream without a cipher. This constructor is
protected because this class does not work without an
underlying cipher.
in - The underlying input stream.
CipherInputStream
public CipherInputStream(InputStream in,
Cipher cipher) Creates a new input stream with a source input stream and cipher.
in - The underlying input stream.cipher - The cipher to filter data through.
available
public int available()
throws IOException Returns the number of bytes available without blocking. The value
returned is the number of bytes that have been processed by the
cipher, and which are currently buffered by this class.
- available in interface FilterInputStream
- The number of bytes immediately available.
read
public int read()
throws IOException Read a single byte from this input stream; returns -1 on the
end-of-file.
- read in interface FilterInputStream
- The byte read, or -1 if there are no more bytes.
read
public int read(byte[] buf)
throws IOException Read bytes into an array, returning the number of bytes read or -1
on the end-of-file.
- read in interface FilterInputStream
buf - The byte arry to read into.
- The number of bytes read, or -1 on the end-of-file.
read
public int read(byte[] buf,
int off,
int len)
throws IOException Read bytes into an array, returning the number of bytes read or -1
on the end-of-file.
- read in interface FilterInputStream
buf - The byte array to read into.off - The offset in buf to start.len - The maximum number of bytes to read.
- The number of bytes read, or -1 on the end-of-file.
skip
public long skip(long bytes)
throws IOException Skip a number of bytes. This class only supports skipping as many
bytes as are returned by
available(), which is the number
of transformed bytes currently in this class's internal buffer.
- skip in interface FilterInputStream
bytes - The number of bytes to skip.
- The number of bytes skipped.
CipherInputStream.java -- Filters input through a cipher.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of GNU Classpath.
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