Package com.itextpdf.kernel.crypto
Class OutputStreamAesEncryption
- java.lang.Object
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- java.io.OutputStream
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- com.itextpdf.kernel.crypto.OutputStreamEncryption
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- com.itextpdf.kernel.crypto.OutputStreamAesEncryption
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- All Implemented Interfaces:
java.io.Closeable
,java.io.Flushable
,java.lang.AutoCloseable
public class OutputStreamAesEncryption extends OutputStreamEncryption
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Field Summary
Fields Modifier and Type Field Description protected AESCipher
cipher
private boolean
finished
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Fields inherited from class com.itextpdf.kernel.crypto.OutputStreamEncryption
out
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Constructor Summary
Constructors Constructor Description OutputStreamAesEncryption(java.io.OutputStream out, byte[] key)
Creates a new instance ofOutputStreamAesEncryption
OutputStreamAesEncryption(java.io.OutputStream out, byte[] key, int off, int len)
Creates a new instance ofOutputStreamAesEncryption
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
finish()
void
write(byte[] b, int off, int len)
Writeslen
bytes from the specified byte array starting at offsetoff
to this output stream.-
Methods inherited from class com.itextpdf.kernel.crypto.OutputStreamEncryption
close, flush, write, write
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Field Detail
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cipher
protected AESCipher cipher
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finished
private boolean finished
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Constructor Detail
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OutputStreamAesEncryption
public OutputStreamAesEncryption(java.io.OutputStream out, byte[] key, int off, int len)
Creates a new instance ofOutputStreamAesEncryption
- Parameters:
out
- theOutputStream
instance to be used as the destination for the encrypted contentkey
- the byte array containing the key for encryptionoff
- offset of the key in the byte arraylen
- the length of the key in the byte array
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OutputStreamAesEncryption
public OutputStreamAesEncryption(java.io.OutputStream out, byte[] key)
Creates a new instance ofOutputStreamAesEncryption
- Parameters:
out
- theOutputStream
instance to be used as the destination for the encrypted contentkey
- the byte array which is the key for encryption
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Method Detail
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write
public void write(byte[] b, int off, int len) throws java.io.IOException
Writeslen
bytes from the specified byte array starting at offsetoff
to this output stream. The general contract forwrite(b, off, len)
is that some of the bytes in the arrayb
are written to the output stream in order; elementb[off]
is the first byte written andb[off+len-1]
is the last byte written by this operation.The
write
method ofOutputStream
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
isnull
, aNullPointerException
is thrown.If
off
is negative, orlen
is negative, oroff+len
is greater than the length of the arrayb
, then an IndexOutOfBoundsException is thrown.- Specified by:
write
in classOutputStreamEncryption
- Parameters:
b
- the data.off
- the start offset in the data.len
- the number of bytes to write.- Throws:
java.io.IOException
- if an I/O error occurs. In particular, anIOException
is thrown if the output stream is closed.
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finish
public void finish()
- Specified by:
finish
in classOutputStreamEncryption
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