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Interface java.security.FeedbackCipher
- public interface FeedbackCipher
An interface implemented by algorithms that use feedback. Examples
include block ciphers in CBC
, CFB
, or
OFB
mode.
This interface is used to set or get the initialization vector,
which is the data first used as feedback.
Note that initialization vectors are not secret, and should not
be used for data (such as cipher keys) where secrecy is required.
-
getInitializationVector()
- Gets the initialization vector for this object.
-
getInitializationVectorLength()
- Returns the size of the initialization vector expected by
setInitializationVector
.
-
setInitializationVector(byte[])
- Sets the initialization vector for this object.
setInitializationVector
public abstract void setInitializationVector(byte iv[])
- Sets the initialization vector for this object. Note that
FeedbackCiphers will usually default to a randomly generated
vector if none is provided.
This method may only be called on an uninitialized cipher
(one in the UNINITIALIZED
state) that implements
FeedbackCipher.
- Parameters:
- iv - the initialization vector.
- Throws: InvalidParameterException
- if the initialization vector
is of the wrong length or otherwise invalid.
getInitializationVector
public abstract byte[] getInitializationVector()
- Gets the initialization vector for this object. This may be
called on a cipher implementing FeedbackCipher. It will return
null
if the initialization vector has not been set.
- Returns:
- the initialization vector for this cipher object.
getInitializationVectorLength
public abstract int getInitializationVectorLength()
- Returns the size of the initialization vector expected by
setInitializationVector
.
- Returns:
- the required size of the argument to
setInitializationVector
.
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