StreamEncryptor is an abstract class which contains functionality
common to all stream ciphers. A stream encryptor is an encryption
scheme which encrypts data one byte at a time, instead of in blocks.
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
StreamEncryptor(OutputStream output)
Creates a StreamEncryptor object based upon an output stream that will be given
the encrypted data.
Method Summary
protected abstract void
encrypt(byte[] plaintext,
int plaintextOffset,
int length,
byte[] ciphertext)
Encrypts data using the specific implementation of the chosen stream encryptor.
void
flush(boolean pad)
Flushes any pending data to the stream and, optionally, does any necessary padding correctly.
void
write(byte[] data,
int offset,
int length)
Writes a specified length of bytes from the given byte array to
this output stream.
Methods inherited from class net.rim.device.api.crypto.CryptoOutputStream
Creates a StreamEncryptor object based upon an output stream that will be given
the encrypted data.
Parameters:
output - An output stream used for writing the transformed data to.
Since:
JDE 3.6.0
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
Method Detail
encrypt
protected abstract void encrypt(byte[] plaintext,
int plaintextOffset,
int length,
byte[] ciphertext)
throws CryptoTokenException
Encrypts data using the specific implementation of the chosen stream encryptor.
Parameters:
plaintext - A byte array containing the input to the stream cipher.
plaintextOffset - The offset, or initial position within the array, of the information to encrypt.
length - The length of the information to encrypt.
ciphertext - A byte array to hold the output of the stream cipher.
Throws:
CryptoTokenException - Thrown when a problem occurs with the crypto token
or the crypto token is invalid.
Since:
JDE 3.6.0
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
Flushes any pending data to the stream and, optionally, does any necessary padding correctly. A subclass should
override this function if they have padding they need done.
This function is useful if you wish to re-use this object and so require that the previously written
data have any necessary padding completed for it.
pad - If true, then perform the appropriate padding code ( if necessary - stream ciphers don't require this )
Otherwise, just flush normally.
Since:
JDE 4.0.0
Category:
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
write
public void write(byte[] data,
int offset,
int length)
throws IOException
Signed: This element is only accessible by signed applications. If you intend to use this element, please visit http://www.blackberry.com/go/codesigning to obtain a set of code signing keys. Code signing is only required for applications running on BlackBerry smartphones; development on BlackBerry Smartphone Simulators can occur without code signing.
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