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SUMMARY: INNER | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
Padding interface. This interface is implemented by general-purpose padding schemes, such as the one described in PKCS#5.
Method Summary | |
---|---|
int |
pad(byte[] in,
int off,
int len)
Performs padding for the given data input. |
int |
padLength(int len)
Determines how long the padding will be for a given input length. |
void |
padWithLen(byte[] in,
int off,
int len)
Adds the given number of padding bytes to the data input. |
int |
unpad(byte[] in,
int off,
int len)
Returns the index where padding starts. |
Method Detail |
public int pad(byte[] in, int off, int len) throws javax.crypto.ShortBufferException
in
- the input buffer with the data to padoff
- the offset in in
where the data to pad startslen
- the length of the data to padjavax.crypto.ShortBufferException
- if in
is too small to hold
the padding bytespublic void padWithLen(byte[] in, int off, int len) throws javax.crypto.ShortBufferException
in
- the input buffer with the data to padthe
- offset in in
where the padding bytes
are appendedlen
- the number of padding bytes to addjavax.crypto.ShortBufferException
- if in
is too small to hold
the padding bytespublic int unpad(byte[] in, int off, int len)
Given a buffer with data and their padding, this method returns the index where the padding starts.
in
- the buffer with the data and their paddingoff
- the offset in in
where the data startslen
- the length of the data and their paddingpublic int padLength(int len)
len
- the length of the data to pad
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