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java.lang.Object
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+--java.io.InputStream
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+--net.rim.device.api.crypto.CryptoInputStream
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+--net.rim.device.api.crypto.MACInputStream
Provides streaming functionality with a MAC by allowing for read calls to an underlying input stream and passing this information through the MAC as it is being read.
MACOutputStream| Field Summary | ||
|
protected MAC |
_mac
Stores that MAC for later use. |
|
protected boolean |
_on
A boolean that determines if information that is read from the input stream should be passed through the MAC before being returned to the user. |
| Fields inherited from class net.rim.device.api.crypto.CryptoInputStream |
_inputStream |
| Constructor Summary | ||
|
MACInputStream(MAC mac,
InputStream inputStream)
Creates a MACInputStream object with the specified MAC
and an input stream that will contain the data to be read. |
|
| Method Summary | ||
|
String |
getAlgorithm()
Returns the name of this algorithm, eg "HMAC". |
|
MAC |
getMAC()
Returns a reference to the MAC being used in this instance of the
class. |
|
void |
on(boolean on)
Allows the programmer to turn the MAC functionality of the stream on or off at will. |
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int |
read(byte[] data,
int offset,
int length)
Reads up to the specified number of bytes from this input stream into an array of bytes. |
| Methods inherited from class net.rim.device.api.crypto.CryptoInputStream |
available, close, getInputStream, markSupported, read, read |
| Methods inherited from class java.io.InputStream |
mark, reset, skip |
| Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
protected MAC _mac
protected boolean _on
Note: By default _on is set to true.
| Constructor Detail |
public MACInputStream(MAC mac, InputStream inputStream)
MACInputStream object with the specified MAC
and an input stream that will contain the data to be read.
mac - The MAC object to use with this input stream.inputStream - The underlying inputStream object that all data
will be read from.| Method Detail |
public String getAlgorithm()
getAlgorithm in class CryptoInputStream
CryptoInputStreampublic MAC getMAC()
MAC being used in this instance of the
class.
MAC object.public void on(boolean on)
Note that _on is true by default.
on - A boolean stating whether the MAC is on (true) or off (false).
public int read(byte[] data,
int offset,
int length)
throws IOException
CryptoInputStreamread in class CryptoInputStream
CryptoInputStreambuffer - The buffer into which the data is read.offset - The starting offset within the buffer, to store the data.length - The maximum number of bytes to read.IOException - Thrown if an I/O error occurs.
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