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java.lang.Objectfr.cryptohash.ShabalGeneric
public class ShabalGeneric
This class implements Shabal for all output sizes from 32 to 512 bits
(inclusive, only multiples of 32 are supported). The output size must
be provided as parameter to the constructor. Alternatively, you may
use the Shabal192
, Shabal224
, Shabal256
,
Shabal384
or Shabal512
classes for size-specific
variants which offer a nullary constructor.
==========================(LICENSE BEGIN)============================ Copyright (c) 2007-2010 Projet RNRT SAPHIR Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ===========================(LICENSE END)=============================
Constructor Summary | |
---|---|
ShabalGeneric(int outSize)
Create the object. |
Method Summary | |
---|---|
Digest |
copy()
Clone the current state. |
byte[] |
digest()
Finalize the current hash computation and return the hash value in a newly-allocated array. |
byte[] |
digest(byte[] inbuf)
Input some bytes, then finalize the current hash computation and return the hash value in a newly-allocated array. |
int |
digest(byte[] outbuf,
int off,
int len)
Finalize the current hash computation and store the hash value in the provided output buffer. |
int |
getBlockLength()
Return the "block length" for the hash function. |
int |
getDigestLength()
Get the natural hash function output length (in bytes). |
void |
reset()
Reset the object: this makes it suitable for a new hash computation. |
java.lang.String |
toString()
Get the display name for this function (e.g. |
void |
update(byte in)
Insert one more input data byte. |
void |
update(byte[] inbuf)
Insert some more bytes. |
void |
update(byte[] inbuf,
int off,
int len)
Insert some more bytes. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
---|
public ShabalGeneric(int outSize)
outSize
- the intended output sizeMethod Detail |
---|
public void update(byte in)
Digest
update
in interface Digest
in
- the input byteDigest
public void update(byte[] inbuf)
Digest
update
in interface Digest
inbuf
- the data bytesDigest
public void update(byte[] inbuf, int off, int len)
Digest
update
in interface Digest
inbuf
- the data bufferoff
- the data offset in inbuf
len
- the data length (in bytes)Digest
public int getDigestLength()
Digest
getDigestLength
in interface Digest
Digest
public byte[] digest()
Digest
digest
in interface Digest
Digest
public byte[] digest(byte[] inbuf)
Digest
digest
in interface Digest
inbuf
- the input data
Digest
public int digest(byte[] outbuf, int off, int len)
Digest
len
parameter
contains the maximum number of bytes that should be written;
no more bytes than the natural hash function output length will
be produced. If len
is smaller than the natural
hash output length, the hash output is truncated to its first
len
bytes. The object is resetted.
digest
in interface Digest
outbuf
- the output bufferoff
- the output offset within outbuf
len
- the requested hash output length (in bytes)
outbuf
Digest
public void reset()
Digest
reset
in interface Digest
Digest
public Digest copy()
Digest
copy
in interface Digest
Digest
public int getBlockLength()
Digest
Return 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.
getBlockLength
in interface Digest
-n
Digest
public java.lang.String toString()
Digest
Get the display name for this function (e.g. "SHA-1"
for SHA-1).
toString
in interface Digest
toString
in class java.lang.Object
Digest
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