Package org.apache.sshd.common.cipher
Class ChaCha20Cipher
java.lang.Object
org.apache.sshd.common.cipher.ChaCha20Cipher
- All Implemented Interfaces:
AlgorithmNameProvider
,Cipher
,CipherInformation
,KeySizeIndicator
AEAD cipher based on the
OpenSSH
ChaCha20-Poly1305 cipher extension.
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Nested Class Summary
Nested ClassesNested classes/interfaces inherited from interface org.apache.sshd.common.cipher.Cipher
Cipher.Mode
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected final ChaCha20Cipher.ChaChaEngine
protected final ChaCha20Cipher.ChaChaEngine
protected final Mac
protected Cipher.Mode
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
int
int
int
int
void
init
(Cipher.Mode mode, byte[] key, byte[] iv) Initialize the cipher for encryption or decryption with the given key and initialization vectorvoid
update
(byte[] input, int inputOffset, int inputLen) Performs in-place encryption or decryption on the given data.void
updateAAD
(byte[] data, int offset, int length) Adds the provided input data as additional authenticated data during encryption or decryption.Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.apache.sshd.common.cipher.Cipher
update, updateAAD, updateWithAAD
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Field Details
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headerEngine
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bodyEngine
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mac
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mode
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Constructor Details
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ChaCha20Cipher
public ChaCha20Cipher()
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Method Details
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getAlgorithm
- Specified by:
getAlgorithm
in interfaceAlgorithmNameProvider
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init
Description copied from interface:Cipher
Initialize the cipher for encryption or decryption with the given key and initialization vector -
updateAAD
Description copied from interface:Cipher
Adds the provided input data as additional authenticated data during encryption or decryption. -
update
Description copied from interface:Cipher
Performs in-place encryption or decryption on the given data. -
getTransformation
- Specified by:
getTransformation
in interfaceCipherInformation
- Returns:
- The actual transformation used - e.g., AES/CBC/NoPadding
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getIVSize
public int getIVSize()- Specified by:
getIVSize
in interfaceCipherInformation
- Returns:
- Size of the initialization vector (in bytes)
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getAuthenticationTagSize
public int getAuthenticationTagSize()- Specified by:
getAuthenticationTagSize
in interfaceCipherInformation
- Returns:
- Size of the authentication tag (AT) in bytes or 0 if this cipher does not support authentication
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getCipherBlockSize
public int getCipherBlockSize()- Specified by:
getCipherBlockSize
in interfaceCipherInformation
- Returns:
- Size of block data used by the cipher (in bytes). For stream ciphers this value is (currently) used to indicate some average work buffer size to be used for the automatic re-keying mechanism described in RFC 4253 - Section 9
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getKdfSize
public int getKdfSize()- Specified by:
getKdfSize
in interfaceCipherInformation
- Returns:
- The block size (in bytes) used to derive the secret key for this cipher
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getKeySize
public int getKeySize()- Specified by:
getKeySize
in interfaceKeySizeIndicator
- Returns:
- The number of bits used in the key
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