public class ChaChaPolyCipherState extends Object implements CipherState
| Modifier | Constructor and Description |
|---|---|
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ChaChaPolyCipherState()
Constructs a new cipher state for the "ChaChaPoly" algorithm.
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protected |
ChaChaPolyCipherState(ChaChaPolyCipherState o)
Copy constructor for cloning
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| Modifier and Type | Method and Description |
|---|---|
ChaChaPolyCipherState |
clone()
I2P
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int |
decryptWithAd(byte[] ad,
byte[] ciphertext,
int ciphertextOffset,
byte[] plaintext,
int plaintextOffset,
int length)
Decrypts a ciphertext buffer using the cipher and a block of associated data.
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void |
destroy()
Destroys all sensitive state in the current object.
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int |
encryptWithAd(byte[] ad,
byte[] plaintext,
int plaintextOffset,
byte[] ciphertext,
int ciphertextOffset,
int length)
Encrypts a plaintext buffer using the cipher and a block of associated data.
|
CipherState |
fork(byte[] key,
int offset)
Creates a new instance of this cipher and initializes it with a key.
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String |
getCipherName()
Gets the Noise protocol name for this cipher.
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int |
getKeyLength()
Gets the length of the key values for this cipher.
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int |
getMACLength()
Gets the length of the MAC values for this cipher.
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boolean |
hasKey()
Determine if this cipher object has been configured with a key.
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void |
initializeKey(byte[] key,
int offset)
Initializes the key on this cipher object.
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void |
setNonce(long nonce)
Sets the nonce value.
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String |
toString()
I2P debug
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public ChaChaPolyCipherState()
protected ChaChaPolyCipherState(ChaChaPolyCipherState o) throws CloneNotSupportedException
CloneNotSupportedExceptionpublic void destroy()
Destroyabledestroy in interface Destroyablepublic String getCipherName()
CipherStategetCipherName in interface CipherStatepublic int getKeyLength()
CipherStategetKeyLength in interface CipherStatepublic int getMACLength()
CipherStategetMACLength in interface CipherStatepublic void initializeKey(byte[] key,
int offset)
CipherStateinitializeKey in interface CipherStatekey - Points to a buffer that contains the key.offset - The offset of the key in the key buffer.
The key buffer must contain at least getKeyLength() bytes
starting at offset.CipherState.hasKey()public boolean hasKey()
CipherStatehasKey in interface CipherStateCipherState.initializeKey(byte[], int)public int encryptWithAd(byte[] ad,
byte[] plaintext,
int plaintextOffset,
byte[] ciphertext,
int ciphertextOffset,
int length)
throws ShortBufferException
CipherStateencryptWithAd in interface CipherStatead - The associated data, or null if there is none.plaintext - The buffer containing the plaintext to encrypt.plaintextOffset - The offset within the plaintext buffer of the
first byte or plaintext data.ciphertext - The buffer to place the ciphertext in. This can
be the same as the plaintext buffer.ciphertextOffset - The first offset within the ciphertext buffer
to place the ciphertext and the MAC tag.length - The length of the plaintext.ShortBufferException - The ciphertext buffer does not have
enough space to hold the ciphertext plus MAC.public int decryptWithAd(byte[] ad,
byte[] ciphertext,
int ciphertextOffset,
byte[] plaintext,
int plaintextOffset,
int length)
throws ShortBufferException,
BadPaddingException
CipherStatedecryptWithAd in interface CipherStatead - The associated data, or null if there is none.ciphertext - The buffer containing the ciphertext to decrypt.ciphertextOffset - The offset within the ciphertext buffer of
the first byte of ciphertext data.plaintext - The buffer to place the plaintext in. This can be
the same as the ciphertext buffer.plaintextOffset - The first offset within the plaintext buffer
to place the plaintext.length - The length of the incoming ciphertext plus the MAC tag.ShortBufferException - The plaintext buffer does not have
enough space to store the decrypted data.BadPaddingException - The MAC value failed to verify.public CipherState fork(byte[] key, int offset)
CipherStatefork in interface CipherStatekey - The buffer containing the key.offset - The offset into the key buffer of the first key byte.public void setNonce(long nonce)
CipherStatesetNonce in interface CipherStatenonce - The new nonce value, which must be greater than or equal
to the current value.
This function is intended for testing purposes only. If the nonce
value goes backwards then security may be compromised.public ChaChaPolyCipherState clone() throws CloneNotSupportedException
clone in interface CipherStateclone in class ObjectCloneNotSupportedException