Known Direct Subclasses
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Class Overview
This class is a Service Provider Interface (therefore the Spi suffix) for
digest algorithms to be supplied by providers. Examples of digest algorithms
are MD5 and SHA.
A digest is a secure hash function for a stream of bytes, like a fingerprint
for the stream of bytes.
Summary
| Public Methods |
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Object
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clone()
Returns a new instance of the same class as the receiver, whose slots
have been filled in with the values in the slots of the receiver.
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[Expand]
Inherited Methods |
From class java.lang.Object
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Object
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clone()
Returns a new instance of the same class as the receiver, whose slots
have been filled in with the values in the slots of the receiver.
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boolean
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equals(Object o)
Compares the argument to the receiver, and returns true if they represent
the same object using a class specific comparison.
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void
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finalize()
Called by the virtual machine when there are no longer any (non-weak)
references to the receiver.
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final
Class<? extends Object>
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getClass()
Returns the unique instance of java.lang.Class which represents the class
of the receiver.
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int
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hashCode()
Returns an integer hash code for the receiver.
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final
void
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notify()
Causes one thread which is wait ing on the receiver to be
made ready to run.
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final
void
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notifyAll()
Causes all threads which are wait ing on the receiver to
be made ready to run.
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String
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toString()
Returns a string containing a concise, human-readable description of the
receiver.
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final
void
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wait(long time, int frac)
Causes the thread which sent this message to be made not ready to run
either pending some change in the receiver (as indicated by
notify or notifyAll) or the expiration of
the timeout.
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final
void
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wait(long time)
Causes the thread which sent this message to be made not ready to run
either pending some change in the receiver (as indicated by
notify or notifyAll) or the expiration of
the timeout.
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final
void
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wait()
Causes the thread which sent this message to be made not ready to run
pending some change in the receiver (as indicated by notify
or notifyAll).
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Public Constructors
public
MessageDigestSpi
()
Public Methods
public
Object
clone
()
Returns a new instance of the same class as the receiver, whose slots
have been filled in with the values in the slots of the receiver.
Classes which wish to support cloning must specify that they implement
the Cloneable interface, since the implementation checks for this.
Returns
- Object a shallow copy of this object.
Protected Methods
protected
abstract
byte[]
engineDigest
()
protected
int
engineDigest
(byte[] buf, int offset, int len)
protected
int
engineGetDigestLength
()
protected
abstract
void
engineReset
()
protected
abstract
void
engineUpdate
(byte input)
protected
abstract
void
engineUpdate
(byte[] input, int offset, int len)