public class AsconVarMacSpi extends AsconMacSpi
The Ascon message authentication code (MAC) algorithm Ascon-Mac is based on the Ascon pseudorandom function Ascon-Prf
.
Ascon-Mac is parameterized by the key length (128-bit), output rate (128-bit), the internal round number (12-rounds), and the tag length (128-bit).
Ascon message authentication modes use the same lightweight 320-bit permutation as the authenticated encryption modes Ascon-128
.
The authentication algorithm takes as its input a 128-bit secret key and a message of arbitrary length.
After each absorbed or squeezed block except the last, the intermediate 12-round permutation is applied to the state, processing the plaintext.
Finally, a 128-bit tag is produced as its output. For more details we refer to the official Ascon specification.
Usage example:
// register IAIK-LW provider IaikLw.addAsProvider();// the message to be encrypted byte[] msg = ...;
// generate the secret key KeyGenerator keyGenerator = KeyGenerator.getInstance("Ascon-Mac"); SecretKey key = keyGenerator.generateKey();
// generate the tag Mac mac = Mac.getInstance("Ascon-Mac"); mac.init(secretKey); mac.update(msg); byte[] result = mac.doFinal();
AsconVarMacASpi
,
Ascon128CipherSpi
Constructor and Description |
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AsconVarMacSpi() |
Modifier and Type | Method and Description |
---|---|
protected int |
getRate()
Gets the block rate for the variant in bytes.
|
protected String |
getVariant()
Gets the variant name.
|
engineDoFinal, engineGetMacLength, engineInit, engineReset, engineUpdate, engineUpdate
clone, engineUpdate
protected String getVariant()
getVariant
in class AsconMacSpi
protected int getRate()
getRate
in class AsconMacSpi
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