AESEngine (I2P Anonymous Network - Java Documentation

java.lang.Object
- net.i2p.crypto.AESEngine

Direct Known Subclasses:

CryptixAESEngine
```
public class AESEngine
extends Object
```
Dummy wrapper for AES cipher operation. Warning - most methods UNUSED unless i2p.encryption = off See CryptixAESEngine overrides for the real thing.

Field Summary

Fields
Modifier and Type Field Description

protected I2PAppContext _context

protected Log _log

Fields
Modifier and Type	Field	Description
`protected I2PAppContext`	`_context`
`protected Log`	`_log`

Constructor Summary

Constructors
Constructor Description

AESEngine(I2PAppContext ctx)

Constructors
Constructor	Description
`AESEngine(I2PAppContext ctx)`

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`decrypt(byte[] payload, int payloadIndex, byte[] out, int outIndex, SessionKey sessionKey, byte[] iv, int length)`	Decrypt the data with the session key
`void`	`decrypt(byte[] payload, int payloadIndex, byte[] out, int outIndex, SessionKey sessionKey, byte[] iv, int ivOffset, int length)`	Decrypt the data with the session key.
`void`	`decryptBlock(byte[] payload, int inIndex, SessionKey sessionKey, byte[] rv, int outIndex)`	This just copies payload to rv, see extension for the real thing.
`void`	`encrypt(byte[] payload, int payloadIndex, byte[] out, int outIndex, SessionKey sessionKey, byte[] iv, int length)`	Encrypt the payload with the session key
`void`	`encrypt(byte[] payload, int payloadIndex, byte[] out, int outIndex, SessionKey sessionKey, byte[] iv, int ivOffset, int length)`	Encrypt the payload with the session key.
`void`	`encryptBlock(byte[] payload, int inIndex, SessionKey sessionKey, byte[] out, int outIndex)`	This just copies payload to out, see extension for the real thing.
`byte[]`	`safeDecrypt(byte[] payload, SessionKey sessionKey, byte[] iv)`	Deprecated. unused
`byte[]`	`safeEncrypt(byte[] payload, SessionKey sessionKey, byte[] iv, int paddedSize)`	Deprecated. unused

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - _log
```
protected final Log _log
```
  - _context
```
protected final I2PAppContext _context
```
- Constructor Detail
  - AESEngine
```
public AESEngine(I2PAppContext ctx)
```
- Method Detail
  - encrypt
```
public void encrypt(byte[] payload,
                    int payloadIndex,
                    byte[] out,
                    int outIndex,
                    SessionKey sessionKey,
                    byte[] iv,
                    int length)
```
    Encrypt the payload with the session key
    
    Parameters:
    
    payload - data to be encrypted
    
    payloadIndex - index into the payload to start encrypting
    
    out - where to store the result
    
    outIndex - where in out to start writing
    
    sessionKey - private esession key to encrypt to
    
    iv - IV for CBC, must be 16 bytes
    
    length - how much data to encrypt
  - encrypt
```
public void encrypt(byte[] payload,
                    int payloadIndex,
                    byte[] out,
                    int outIndex,
                    SessionKey sessionKey,
                    byte[] iv,
                    int ivOffset,
                    int length)
```
    Encrypt the payload with the session key. This just copies payload to out, see extension for the real thing.
    
    Parameters:
    
    payload - data to be encrypted
    
    payloadIndex - index into the payload to start encrypting
    
    out - where to store the result
    
    outIndex - where in out to start writing
    
    sessionKey - private esession key to encrypt to
    
    iv - IV for CBC
    
    length - how much data to encrypt
  - safeEncrypt
```
@Deprecated
public byte[] safeEncrypt(byte[] payload,
                          SessionKey sessionKey,
                          byte[] iv,
                          int paddedSize)
```
    Deprecated.
    unused
    
    Encrypt the SHA-256 Hash of the IV, the 4 byte length, and the payload, with random padding up to the paddedSize, rounded up to the next multiple of 16.
    
    Parameters:
    
    paddedSize - minimum size of the output
    
    iv - IV for CBC, must be 16 bytes
    
    Returns:
    
    null on error
  - safeDecrypt
```
@Deprecated
public byte[] safeDecrypt(byte[] payload,
                          SessionKey sessionKey,
                          byte[] iv)
```
    Deprecated.
    unused
    
    See safeEncrypt() for description. WARNING - no check for maximum length here, OOM DOS possible, fix it if you're going to use this.
    
    Parameters:
    
    iv - IV for CBC, must be 16 bytes
    
    Returns:
    
    null on error
  - decrypt
```
public void decrypt(byte[] payload,
                    int payloadIndex,
                    byte[] out,
                    int outIndex,
                    SessionKey sessionKey,
                    byte[] iv,
                    int length)
```
    Decrypt the data with the session key
    
    Parameters:
    
    payload - data to be decrypted
    
    payloadIndex - index into the payload to start decrypting
    
    out - where to store the cleartext
    
    outIndex - where in out to start writing
    
    sessionKey - private session key to decrypt to
    
    iv - IV for CBC
    
    length - how much data to decrypt
  - decrypt
```
public void decrypt(byte[] payload,
                    int payloadIndex,
                    byte[] out,
                    int outIndex,
                    SessionKey sessionKey,
                    byte[] iv,
                    int ivOffset,
                    int length)
```
    Decrypt the data with the session key. This just copies payload to out, see extension for the real thing.
    
    Parameters:
    
    payload - data to be decrypted
    
    payloadIndex - index into the payload to start decrypting
    
    out - where to store the cleartext
    
    outIndex - where in out to start writing
    
    sessionKey - private session key to decrypt to
    
    iv - IV for CBC
    
    length - how much data to decrypt
  - encryptBlock
```
public void encryptBlock(byte[] payload,
                         int inIndex,
                         SessionKey sessionKey,
                         byte[] out,
                         int outIndex)
```
    This just copies payload to out, see extension for the real thing.
    
    Parameters:
    
    sessionKey - unused
  - decryptBlock
```
public void decryptBlock(byte[] payload,
                         int inIndex,
                         SessionKey sessionKey,
                         byte[] rv,
                         int outIndex)
```
    This just copies payload to rv, see extension for the real thing.
    
    Parameters:
    
    payload - encrypted data
    
    sessionKey - private session key

Class AESEngine

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

_log

_context

Constructor Detail

AESEngine

Method Detail

encrypt

encrypt

safeEncrypt

safeDecrypt

decrypt

decrypt

encryptBlock

decryptBlock