CryptixRijndael_Algorithm (Javadocs [I2P+ 2.13.0+]

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

```
public final class CryptixRijndael_Algorithm
extends Object
```
Rijndael AES algorithm implementation. Supports 128, 192, and 256-bit keys with 128-bit block size.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`blockDecrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey)` Convenience method to decrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
`static void`	`blockDecrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey, int blockSize)` Decrypt exactly one block of ciphertext.
`static void`	`blockEncrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey)` Convenience method to encrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
`static void`	`blockEncrypt(byte[] in, byte[] result, int inOffset, int outOffset, Object sessionKey, int blockSize)` Encrypt exactly one block of plaintext.
`static int`	`blockSize()` Default input block length for Rijndael.
`static int`	`getRounds(int keySize, int blockSize)` Return The number of rounds for a given Rijndael's key and block sizes.
`static Object`	`makeKey(byte[] k)` Convenience method to expand a user-supplied key material into a session key, assuming Rijndael's default block size (128-bit).
`static Object`	`makeKey(byte[] k, int blockSize)` Expand a user-supplied key material into a session key.
`static Object`	`makeKey(byte[] k, int blockSize, CryptixAESKeyCache.KeyCacheEntry keyData)` Expand a user-supplied key material into a session key.

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

- Method Detail
  - blockDecrypt
```
public static final void blockDecrypt(byte[] in,
                                      byte[] result,
                                      int inOffset,
                                      int outOffset,
                                      Object sessionKey)
```
    Convenience method to decrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
    Parameters:
    in - The ciphertext.
    result - The resulting ciphertext.
    inOffset - Index of in from which to start considering data.
    outOffset - Index in result at which to start writing data.
    sessionKey - The session key to use for decryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Kd field, for decryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.
  - blockDecrypt
```
public static final void blockDecrypt(byte[] in,
                                      byte[] result,
                                      int inOffset,
                                      int outOffset,
                                      Object sessionKey,
                                      int blockSize)
```
    Decrypt exactly one block of ciphertext.
    Parameters:
    in - The ciphertext.
    result - The resulting ciphertext.
    inOffset - Index of in from which to start considering data.
    outOffset - Index in result at which to start writing data.
    sessionKey - The session key to use for decryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Kd field, for decryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.
    blockSize - The block size in bytes of this Rijndael.
  - blockEncrypt
```
public static final void blockEncrypt(byte[] in,
                                      byte[] result,
                                      int inOffset,
                                      int outOffset,
                                      Object sessionKey)
```
    Convenience method to encrypt exactly one block of plaintext, assuming Rijndael's default block size (128-bit).
    Parameters:
    in - The plaintext.
    result - The resulting ciphertext.
    inOffset - Index of in from which to start considering data.
    outOffset - Index in result at which to start writing data.
    sessionKey - The session key to use for encryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Ke field for encryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.
  - blockEncrypt
```
public static final void blockEncrypt(byte[] in,
                                      byte[] result,
                                      int inOffset,
                                      int outOffset,
                                      Object sessionKey,
                                      int blockSize)
```
    Encrypt exactly one block of plaintext.
    Parameters:
    in - The plaintext.
    result - The resulting ciphertext.
    inOffset - Index of in from which to start considering data.
    outOffset - Index in result at which to start writing data.
    sessionKey - The session key to use for encryption. This is a CryptixAESKeyCache.KeyCacheEntry. We use the Ke field for encryption. The actual parameter type is opaque, changed in 0.9.31, and is subject to change again.
    blockSize - The block size in bytes of this Rijndael.
  - blockSize
```
public static final int blockSize()
```
    Default input block length for Rijndael.
    Returns:
    The default length in bytes of the Algorithm input block.
  - getRounds
```
public static final int getRounds(int keySize,
                                  int blockSize)
```
    Return The number of rounds for a given Rijndael's key and block sizes.
    Parameters:
    keySize - The size of the user key material in bytes.
    blockSize - The desired block size in bytes.
    Returns:
    The number of rounds for a given Rijndael's key and block sizes.
  - makeKey
```
public static final Object makeKey(byte[] k)
                            throws InvalidKeyException
```
    Convenience method to expand a user-supplied key material into a session key, assuming Rijndael's default block size (128-bit).
    Parameters:
    k - The 128/192/256-bit user-key to use.
    Returns:
    an array of two int[][] containing { Ke, Kd }
    Throws:
    InvalidKeyException - If the key is invalid.
  - makeKey
```
public static final Object makeKey(byte[] k,
                                   int blockSize)
                            throws InvalidKeyException
```
    Expand a user-supplied key material into a session key.
    Parameters:
    k - The 128/192/256-bit user-key to use.
    blockSize - The block size in bytes of this Rijndael, must be 16, 24, or 32.
    Returns:
    a CryptixAESKeyCache.KeyCacheEntry containing { Ke, Kd }. The actual return type is opaque, changed in 0.9.31, and is subject to change again.
    Throws:
    InvalidKeyException - If the key is invalid.
  - makeKey
```
public static final Object makeKey(byte[] k,
                                   int blockSize,
                                   CryptixAESKeyCache.KeyCacheEntry keyData)
                            throws InvalidKeyException
```
    Expand a user-supplied key material into a session key. Not for external use, not a public API.
    Parameters:
    k - The 128/192/256-bit user-key to use.
    blockSize - The block size in bytes of this Rijndael, must be 16, 24, or 32.
    keyData - a cached data structure to fill in, or null.
    Returns:
    a CryptixAESKeyCache.KeyCacheEntry containing { Ke, Kd }. If keyData is non-null, this is keyData. If keyData is null, this is newly allocated.
    Throws:
    InvalidKeyException - If the key is invalid.

Class CryptixRijndael_Algorithm

Method Summary

Methods inherited from class java.lang.Object

Method Detail

blockDecrypt

blockDecrypt

blockEncrypt

blockEncrypt

blockSize

getRounds

makeKey

makeKey

makeKey