com.itextpdf.kernel.crypto

Class OutputStreamAesEncryption

java.lang.Object

java.io.OutputStream

com.itextpdf.kernel.crypto.OutputStreamEncryption

com.itextpdf.kernel.crypto.OutputStreamAesEncryption

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class OutputStreamAesEncryption
extends OutputStreamEncryption

Field Summary

Fields

Modifier and Type	Field and Description
protected AESCipher	cipher

Fields inherited from class com.itextpdf.kernel.crypto.OutputStreamEncryption

out

Constructor Summary

Constructors

Constructor and Description
OutputStreamAesEncryption(OutputStream out, byte[] key) Creates a new instance of OutputStreamAesEncryption
OutputStreamAesEncryption(OutputStream out, byte[] key, int off, int len) Creates a new instance of OutputStreamAesEncryption

Method Summary

Modifier and Type	Method and Description
void	finish()
void	write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this output stream.

Methods inherited from class com.itextpdf.kernel.crypto.OutputStreamEncryption

close, flush, write, write

Methods inherited from class java.lang.Object

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

Field Detail

cipher

protected AESCipher cipher

Constructor Detail

OutputStreamAesEncryption

public OutputStreamAesEncryption(OutputStream out,
                                 byte[] key,
                                 int off,
                                 int len)

Creates a new instance of OutputStreamAesEncryption

Parameters:

out - the OutputStream instance to be used as the destination for the encrypted content

key - the byte array containing the key for encryption

off - offset of the key in the byte array

len - the length of the key in the byte array

OutputStreamAesEncryption

public OutputStreamAesEncryption(OutputStream out,
                                 byte[] key)

Creates a new instance of OutputStreamAesEncryption

Parameters:

out - the OutputStream instance to be used as the destination for the encrypted content

key - the byte array which is the key for encryption

Method Detail

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException

Writes len bytes from the specified byte array starting at offset off to this output stream. The general contract for write(b, off, len) is that some of the bytes in the array b are written to the output stream in order; element b[off] is the first byte written and b[off+len-1] is the last byte written by this operation.

The write method of OutputStream calls the write method of one argument on each of the bytes to be written out. Subclasses are encouraged to override this method and provide a more efficient implementation.

If b is null, a NullPointerException is thrown.

If off is negative, or len is negative, or off+len is greater than the length of the array b, then an IndexOutOfBoundsException is thrown.

Specified by:

write in class OutputStreamEncryption

Parameters:

b - the data.

off - the start offset in the data.

len - the number of bytes to write.

Throws:

IOException - if an I/O error occurs. In particular, an IOException is thrown if the output stream is closed.

finish

public void finish()

Specified by:

finish in class OutputStreamEncryption