Class JceChaCha20Poly1305
- java.lang.Object
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- org.bouncycastle.tls.crypto.impl.jcajce.JceChaCha20Poly1305
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- All Implemented Interfaces:
TlsAEADCipherImpl
public class JceChaCha20Poly1305 extends java.lang.Object implements TlsAEADCipherImpl
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Field Summary
Fields Modifier and Type Field Description protected byte[]
additionalData
protected javax.crypto.Cipher
cipher
protected javax.crypto.SecretKey
cipherKey
protected int
cipherMode
protected javax.crypto.Mac
mac
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Constructor Summary
Constructors Constructor Description JceChaCha20Poly1305(org.bouncycastle.jcajce.util.JcaJceHelper helper, boolean isEncrypting)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
doFinal(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset)
Perform the cipher encryption/decryption returning the output in output.int
getOutputSize(int inputLength)
Return the maximum size of the output for input of inputLength bytes.void
init(byte[] nonce, int macSize, byte[] additionalData)
Initialise the parameters for the AEAD operator.protected void
initMAC(byte[] firstBlock)
protected void
runCipher(byte[] buf)
void
setKey(byte[] key, int keyOff, int keyLen)
Set the key to be used by the AEAD cipher implementation supporting this service.protected void
updateMAC(byte[] buf, int off, int len)
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Method Detail
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doFinal
public int doFinal(byte[] input, int inputOffset, int inputLength, byte[] output, int outputOffset) throws java.io.IOException
Description copied from interface:TlsAEADCipherImpl
Perform the cipher encryption/decryption returning the output in output.Note: we have to use doFinal() here as it is the only way to guarantee output from the underlying cipher.
- Specified by:
doFinal
in interfaceTlsAEADCipherImpl
- Parameters:
input
- array holding input data to the cipher.inputOffset
- offset into input array data starts at.inputLength
- length of the input data in the array.output
- array to hold the cipher output.outputOffset
- offset into output array to start saving output.- Returns:
- the amount of data written to output.
- Throws:
java.io.IOException
- in case of failure.
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getOutputSize
public int getOutputSize(int inputLength)
Description copied from interface:TlsAEADCipherImpl
Return the maximum size of the output for input of inputLength bytes.- Specified by:
getOutputSize
in interfaceTlsAEADCipherImpl
- Parameters:
inputLength
- the length (in bytes) of the proposed input.- Returns:
- the maximum size of the output.
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init
public void init(byte[] nonce, int macSize, byte[] additionalData) throws java.io.IOException
Description copied from interface:TlsAEADCipherImpl
Initialise the parameters for the AEAD operator.- Specified by:
init
in interfaceTlsAEADCipherImpl
- Parameters:
nonce
- the nonce.macSize
- MAC size in bytes.additionalData
- any additional data to be included in the MAC calculation.- Throws:
java.io.IOException
- if the parameters are inappropriate.
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setKey
public void setKey(byte[] key, int keyOff, int keyLen) throws java.io.IOException
Description copied from interface:TlsAEADCipherImpl
Set the key to be used by the AEAD cipher implementation supporting this service.- Specified by:
setKey
in interfaceTlsAEADCipherImpl
- Parameters:
key
- array holding the AEAD cipher key.keyOff
- offset into the array the key starts at.keyLen
- length of the key in the array.- Throws:
java.io.IOException
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initMAC
protected void initMAC(byte[] firstBlock) throws java.security.InvalidKeyException
- Throws:
java.security.InvalidKeyException
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runCipher
protected void runCipher(byte[] buf) throws java.security.GeneralSecurityException
- Throws:
java.security.GeneralSecurityException
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updateMAC
protected void updateMAC(byte[] buf, int off, int len)
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