public class MD5 extends DigestEngine
This class implements the MD5 digest algorithm under the
Digest API, using the DigestEngine class.
MD5 is defined in RFC 1321.
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| Constructor and Description |
|---|
MD5()
Create the object.
|
| Modifier and Type | Method and Description |
|---|---|
Digest |
copy()
Clone the current state.
|
protected void |
doInit()
This function is called at object creation time; the
implementation should use it to perform initialization tasks.
|
protected void |
doPadding(byte[] output,
int outputOffset)
Perform the final padding and store the result in the
provided buffer.
|
protected void |
engineReset()
Reset the hash algorithm state.
|
int |
getBlockLength()
Return the "block length" for the hash function.
|
int |
getDigestLength()
Get the natural hash function output length (in bytes).
|
protected void |
makeMDPadding()
Compute the padding.
|
protected void |
processBlock(byte[] data)
Process one block of data.
|
String |
toString()
Get the display name for this function (e.g.
|
copyState, digest, digest, digest, flush, getBlockBuffer, getBlockCount, getInternalBlockLength, reset, update, update, updatepublic Digest copy()
DigestDigestpublic int getDigestLength()
DigestDigestpublic int getBlockLength()
DigestReturn the "block length" for the hash function. This
value is naturally defined for iterated hash functions
(Merkle-Damgard). It is used in HMAC (that's what the
HMAC specification
names the "B" parameter).
If the function is "block-less" then this function may
return -n where n is an integer such that the
block length for HMAC ("B") will be inferred from the
key length, by selecting the smallest multiple of n
which is no smaller than the key length. For instance, for
the Fugue-xxx hash functions, this function returns -4: the
virtual block length B is the HMAC key length, rounded up to
the next multiple of 4.
-nDigestprotected void engineReset()
DigestEngineengineReset in class DigestEngineDigestEngineprotected void doPadding(byte[] output,
int outputOffset)
DigestEngineDigestEngine.flush()
and then DigestEngine.update(byte) with the appropriate padding
data in order to get the full input data.doPadding in class DigestEngineoutput - the output bufferoutputOffset - the output offsetDigestEngineprotected void doInit()
DigestEngineDigest.getDigestLength().doInit in class DigestEngineDigestEngineprotected void processBlock(byte[] data)
DigestEngineprocessBlock in class DigestEnginedata - the data blockDigestEnginepublic String toString()
DigestGet the display name for this function (e.g. "SHA-1"
for SHA-1).
protected void makeMDPadding()
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