Class SHA1Digest
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- All Implemented Interfaces:
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io.anyline.nfc.bouncycastle.crypto.Digest
,io.anyline.nfc.bouncycastle.crypto.ExtendedDigest
,io.anyline.nfc.bouncycastle.crypto.digests.EncodableDigest
,io.anyline.nfc.bouncycastle.util.Memoable
public class SHA1Digest extends GeneralDigest implements EncodableDigest
implementation of SHA-1 as outlined in "Handbook of Applied Cryptography", pages 346 - 349. It is interesting to ponder why the, apart from the extra IV, the other difference here from MD5 is the "endianness" of the word processing!
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Constructor Summary
Constructors Constructor Description SHA1Digest()
Standard constructor SHA1Digest(SHA1Digest t)
Copy constructor. SHA1Digest(Array<byte> encodedState)
State constructor - create a digest initialised with the state of a previous one.
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Method Summary
Modifier and Type Method Description String
getAlgorithmName()
return the algorithm name int
getDigestSize()
return the size, in bytes, of the digest produced by this message digest. int
doFinal(Array<byte> out, int outOff)
close the digest, producing the final digest value. void
reset()
reset the chaining variables Memoable
copy()
Produce a copy of this object with its configuration and in its current state. void
reset(Memoable other)
Restore a copied object state into this object. Array<byte>
getEncodedState()
Return an encoded byte array for the digest's internal state -
Methods inherited from class io.anyline.nfc.bouncycastle.crypto.digests.GeneralDigest
finish, getByteLength, update, update
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Methods inherited from class io.anyline.nfc.bouncycastle.crypto.Digest
update, update
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Constructor Detail
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SHA1Digest
SHA1Digest()
Standard constructor
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SHA1Digest
SHA1Digest(SHA1Digest t)
Copy constructor.
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SHA1Digest
SHA1Digest(Array<byte> encodedState)
State constructor - create a digest initialised with the state of a previous one.- Parameters:
encodedState
- the encoded state from the originating digest.
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Method Detail
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getAlgorithmName
String getAlgorithmName()
return the algorithm name
- Returns:
the algorithm name
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getDigestSize
int getDigestSize()
return the size, in bytes, of the digest produced by this message digest.
- Returns:
the size, in bytes, of the digest produced by this message digest.
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doFinal
int doFinal(Array<byte> out, int outOff)
close the digest, producing the final digest value. The doFinal call leaves the digest reset.
- Parameters:
out
- the array the digest is to be copied into.outOff
- the offset into the out array the digest is to start at.
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reset
void reset()
reset the chaining variables
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copy
Memoable copy()
Produce a copy of this object with its configuration and in its current state.
The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.
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reset
void reset(Memoable other)
Restore a copied object state into this object.
Implementations of this method should try to avoid or minimise memory allocation to perform the reset.
- Parameters:
other
- an object originally copied from an object of the same type as this instance.
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getEncodedState
Array<byte> getEncodedState()
Return an encoded byte array for the digest's internal state
- Returns:
an encoding of the digests internal state.
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