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org.bouncycastle.crypto.engines

public Class ISAPEngine

extends Object
implements AEADCipher
Class Inheritance
All Implemented Interfaces
org.bouncycastle.crypto.modes.AEADCipher
Imports
java.io.ByteArrayOutputStream, org.bouncycastle.crypto.CipherParameters, .CryptoServicesRegistrar, .DataLengthException, .InvalidCipherTextException, .OutputLengthException, org.bouncycastle.crypto.constraints.DefaultServiceProperties, org.bouncycastle.crypto.modes.AEADCipher, org.bouncycastle.crypto.params.KeyParameter, .ParametersWithIV, org.bouncycastle.util.Pack
ISAP AEAD v2, https://isap.iaik.tugraz.at/ https://csrc.nist.gov/CSRC/media/Projects/lightweight-cryptography/documents/finalist-round/updated-spec-doc/isap-spec-final.pdf

ISAP AEAD v2 with reference to C Reference Impl from: https://github.com/isap-lwc/isap-code-package

Nested and Inner Type Summary

Modifier and TypeClass and Description
private static interface
ISAPEngine.ISAP_AEAD

public abstract class
ISAPEngine.ISAPAEAD_A

private class
ISAPEngine.ISAPAEAD_A_128

private class
ISAPEngine.ISAPAEAD_A_128A

private abstract class
ISAPEngine.ISAPAEAD_K

private class
ISAPEngine.ISAPAEAD_K_128

private class
ISAPEngine.ISAPAEAD_K_128A

public static enum
ISAPEngine.IsapType

Field Summary

Modifier and TypeField and Description
private ByteArrayOutputStream
aadData

private byte[]
ad

private String
algorithmName

private byte[]
c

pack-priv final int
CRYPTO_KEYBYTES

pack-priv final int
CRYPTO_NPUBBYTES

private boolean
forEncryption

private boolean
initialised

private int
ISAP_rH

private int
ISAP_rH_SZ

pack-priv final int
ISAP_STATE_SZ

private ISAPEngine.ISAP_AEAD
ISAPAEAD

private byte[]
k

private byte[]
mac

private final ByteArrayOutputStream
message

private byte[]
npub

private final ByteArrayOutputStream
outputStream

Constructor Summary

AccessConstructor and Description
public
ISAPEngine(ISAPEngine.IsapType isapType)

Method Summary

Modifier and TypeMethod and Description
public int
doFinal(byte[]
space for any resulting output data.
output, int
offset into out to start copying the data at.
outOff)

Implements org.bouncycastle.crypto.modes.AEADCipher.doFinal.

Finish the operation either appending or verifying the MAC at the end of the data.
public String
getAlgorithmName()

Implements org.bouncycastle.crypto.modes.AEADCipher.getAlgorithmName.

Return the name of the algorithm.
public int
getBlockSize()

public int
getIVBytesSize()

public int
getKeyBytesSize()

public byte[]
getMac()

Implements org.bouncycastle.crypto.modes.AEADCipher.getMac.

Return the value of the MAC associated with the last stream processed.
public int
getOutputSize(int
the length of the input.
len)

Implements org.bouncycastle.crypto.modes.AEADCipher.getOutputSize.

return the size of the output buffer required for a processBytes plus a doFinal with an input of len bytes.
public int
getUpdateOutputSize(int
the length of the input.
len)

Implements org.bouncycastle.crypto.modes.AEADCipher.getUpdateOutputSize.

return the size of the output buffer required for a processBytes an input of len bytes.
public void
init(boolean
true if we are setting up for encryption, false otherwise.
forEncryption, CipherParameters
the necessary parameters for the underlying cipher to be initialised.
params)

Implements org.bouncycastle.crypto.modes.AEADCipher.init.

initialise the underlying cipher.
public void
processAADByte(byte
the byte to be processed.
in)

Implements org.bouncycastle.crypto.modes.AEADCipher.processAADByte.

Add a single byte to the associated data check.
public void
processAADBytes(byte[]
the input byte array.
in, int
the offset into the in array where the data to be processed starts.
inOff, int
the number of bytes to be processed.
len)

Implements org.bouncycastle.crypto.modes.AEADCipher.processAADBytes.

Add a sequence of bytes to the associated data check.
public int
processByte(byte
the byte to be processed.
in, byte[]
the output buffer the processed byte goes into.
out, int
the offset into the output byte array the processed data starts at.
outOff)

Implements org.bouncycastle.crypto.modes.AEADCipher.processByte.

encrypt/decrypt a single byte.
public int
processBytes(byte[]
the input byte array.
input, int
the offset into the in array where the data to be processed starts.
inOff, int
the number of bytes to be processed.
len, byte[]
the output buffer the processed bytes go into.
output, int
the offset into the output byte array the processed data starts at.
outOff)

Implements org.bouncycastle.crypto.modes.AEADCipher.processBytes.

process a block of bytes from in putting the result into out.
public void
reset()

Implements org.bouncycastle.crypto.modes.AEADCipher.reset.

Reset the cipher.
Inherited from java.lang.Object:
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