| java.lang.Object | |
| ↳ | java.security.MessageDigestSpi |
 Known Direct Subclasses
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MessageDigestSpi is the Service Provider Interface (SPI) definition
for MessageDigest. Examples of digest algorithms are MD5 and SHA. A
digest is a secure one way hash function for a stream of bytes. It acts like
a fingerprint for a stream of bytes.
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| Public Methods | |||||||||||
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Creates and returns a copy of this
Object.
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| Protected Methods | |||||||||||
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Computes and returns the final hash value for this
MessageDigestSpi.
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Computes and stores the final hash value for this
MessageDigestSpi.
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Returns the engine digest length in bytes.
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Puts this
MessageDigestSpi back in an initial state, such that it
is ready to compute a one way hash value.
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Updates this
MessageDigestSpi using the given byte[].
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Updates this
MessageDigestSpi using the given byte.
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Updates this
MessageDigestSpi using the given input.
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[Expand]
Inherited Methods | |||||||||||
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From class
java.lang.Object
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Creates and returns a copy of this Object. The default
implementation returns a so-called "shallow" copy: It creates a new
instance of the same class and then copies the field values (including
object references) from this instance to the new instance. A "deep" copy,
in contrast, would also recursively clone nested objects. A subclass that
needs to implement this kind of cloning should call super.clone()
to create the new instance and then create deep copies of the nested,
mutable objects.
| CloneNotSupportedException |
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Computes and returns the final hash value for this
MessageDigestSpi. After the digest is computed the receiver is
reset.
Computes and stores the final hash value for this
MessageDigestSpi. After the digest is computed the receiver is
reset.
| buf | the buffer to store the result in. |
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| offset | the index of the first byte in buf to store in. |
| len | the number of bytes allocated for the digest. |
Developers
buf.| DigestException | if an error occures. |
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| IllegalArgumentException | if offset or len are not valid in respect to
buf. |
Returns the engine digest length in bytes. If the implementation does not
implement this function 0 is returned.
0.
Puts this MessageDigestSpi back in an initial state, such that it
is ready to compute a one way hash value.
Updates this MessageDigestSpi using the given byte[].
| input | the byte array. |
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| offset | the index of the first byte in input to update from. |
| len | the number of bytes in input to update from. |
| IllegalArgumentException | if offset or len are not valid in respect to
input.
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Updates this MessageDigestSpi using the given byte.
| input | the byte to update this MessageDigestSpi with. |
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Updates this MessageDigestSpi using the given input.
| input | the ByteBuffer.
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