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Interface java.security.Padding

public interface Padding
This interface is implemented by classes that provide a general-purpose padding scheme, such as the one described in PKCS#5 or in RFC 1423 (PEM).

Method Index

o pad(byte[], int, int)
Returns the padding for a given array of bytes.
o paddingScheme()
Returns the standard name of the padding scheme implemented.
o padLength(int)
Returns the absolute value of the increase in size which a padding operation would cause on input data of a given length.
o unpad(byte[], int, int)
Given the specified subarray of bytes that includes padding bytes, returns the index indicating where padding starts.

Methods

o pad 
 public abstract int pad(byte in[],
                         int off,
                         int len)
Returns the padding for a given array of bytes. The padded bytes are written to the same buffer that is used for input ("in").

Parameters:
in - the buffer to pad.
off - the offset into the in buffer of the first byte in the group of bytes to be padded.
len - the number of bytes from the in buffer, starting at off, that need to be padded.
Returns:
the number of padding bytes written to out.
See Also:
blockSize
o unpad 
 public abstract int unpad(byte in[],
                           int off,
                           int len)
Given the specified subarray of bytes that includes padding bytes, returns the index indicating where padding starts.

Parameters:
in - the buffer containing the bytes.
off - the starting offset in the in buffer of the bytes to be checked to determine where padding starts.
len - the number of bytes from the in buffer to check, starting at offset off.
Returns:
the index into the in buffer indicating where the padding starts.
o padLength 
 public abstract int padLength(int len)
Returns the absolute value of the increase in size which a padding operation would cause on input data of a given length.

Parameters:
len - the length of the data which is to be padded.
Returns:
the absolute value of the increase in size which a padding operation would cause on input data of the specified length.
o paddingScheme 
 public abstract String paddingScheme()
Returns the standard name of the padding scheme implemented. See Appendix A in the Java Cryptography Extension API Specification & Reference for more information about standard names for padding schemes.

Returns:
the standard name of the padding scheme, such as "PKCS#5". 
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