jmathlib.toolbox.crypto
Class aes

java.lang.Object
  jmathlib.core.interpreter.RootObject
      jmathlib.core.functions.Function
          jmathlib.core.functions.ExternalFunction
              jmathlib.toolbox.crypto.aes

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, ErrorCodes, TokenConstants

public class aes
extends ExternalFunction

An external function for computing a mesh of a matrix

See Also:

Serialized Form

Field Summary

static int	BLOCK_BITS AES block size in bits (N.B. the Rijndael algorithm itself allows for other sizes).
static int	BLOCK_SIZE AES block size in bytes (N.B. the Rijndael algorithm itself allows for other sizes).
static int	DIR_BOTH
static int	DIR_DECRYPT
static int	DIR_ENCRYPT

Fields inherited from class jmathlib.core.functions.ExternalFunction

IMAG, REAL

Fields inherited from class jmathlib.core.functions.Function

lastModified, name, pathAndFileName

Fields inherited from interface jmathlib.core.constants.ErrorCodes

ERR_BRACKET_OPEN, ERR_BRACKET_ORDER, ERR_FUNCTION_NOT_FOUND, ERR_FUNCTION_NOT_IMPLEMENTED, ERR_INSUFFICIENT_PARAMETERS, ERR_INVALID_PARAMETER, ERR_LVALUE_REQUIRED, ERR_MATRIX_SINGULAR, ERR_NOT_SQUARE_MATRIX, ERR_OPNOTSUPPORTED, ERR_TOO_MANY_PARAMETERS, ERR_USER_ERROR, ERR_VARIABLE_NOTDEFINED, OK, OK_FUNCTION_PROCESS

Fields inherited from interface jmathlib.core.constants.TokenConstants

ADDSUB_PRIORITY, AND_PRIORITY, ANDAND_PRIORITY, ASSIGN_PRIORITY, BRACKET_PRIORITY, COMPARE_PRIORITY, CONCAT, MATRIX, MULDIV_PRIORITY, OR_PRIORITY, OROR_PRIORITY, PARAMETER, POWER_PRIORITY, RELATION_PRIORITY, SINGLE, ttDelimiter, ttNotSet, ttOperand, ttOperator

Constructor Summary

aes()

Method Summary

int	blockSize() Block size in bytes
void	decrypt(byte[] ct, byte[] pt) Decrypt exactly one block (BLOCK_SIZE bytes) of ciphertext.
void	encrypt(byte[] pt, byte[] ct) Encrypt exactly one block (BLOCK_SIZE bytes) of plaintext.
OperandToken	evaluate(Token[] operands, GlobalValues globals) returns two matrices
void	finalize() Destroy all sensitive information in this object.
int	keySize() Block size in bytes
void	makeKey(byte[] cipherKey, int keyBits) Setup the AES key schedule (any cipher direction).
void	makeKey(byte[] cipherKey, int keySize, int direction) Setup the AES key schedule for encryption, decryption, or both.

Methods inherited from class jmathlib.core.functions.ExternalFunction

getParamCount

Methods inherited from class jmathlib.core.functions.Function

debugLine, equals, getLastModified, getName, getNArgIn, getNArgOut, getNoOfLeftHandArguments, getPathAndFileName, setLastModified, setName, setNoOfLeftHandArguments, setPathAndFileName, throwMathLibException

Methods inherited from class jmathlib.core.interpreter.RootObject

clone, toString

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

BLOCK_BITS

public static final int BLOCK_BITS

AES block size in bits (N.B. the Rijndael algorithm itself allows for other sizes).

See Also:

Constant Field Values

BLOCK_SIZE

public static final int BLOCK_SIZE

AES block size in bytes (N.B. the Rijndael algorithm itself allows for other sizes).

See Also:

Constant Field Values

DIR_DECRYPT

public static final int DIR_DECRYPT

See Also:

Constant Field Values

DIR_ENCRYPT

public static final int DIR_ENCRYPT

See Also:

Constant Field Values

DIR_BOTH

public static final int DIR_BOTH

See Also:

Constant Field Values

Constructor Detail

aes

public aes()

Method Detail

evaluate

public OperandToken evaluate(Token[] operands,
                             GlobalValues globals)

returns two matrices

Specified by:

evaluate in class Function

Parameters:

operands[0] - = x values (e.g. [-2:0.2:2])

operands[1] - = y values (e.g. [-2:0.2:2])

operands[2] - = y values (e.g. [-2:0.2:2])

Returns:

[X,Y] as matrices

blockSize

public final int blockSize()

Block size in bytes

keySize

public final int keySize()

Block size in bytes

makeKey

public final void makeKey(byte[] cipherKey,
                          int keySize,
                          int direction)
                   throws java.lang.RuntimeException

Setup the AES key schedule for encryption, decryption, or both.

Parameters:

cipherKey - the cipher key (128, 192, or 256 bits).

keyBits - size of the cipher key in bits.

direction - cipher direction (DIR_ENCRYPT, DIR_DECRYPT, or DIR_BOTH).

Throws:

java.lang.RuntimeException

makeKey

public final void makeKey(byte[] cipherKey,
                          int keyBits)
                   throws java.lang.RuntimeException

Setup the AES key schedule (any cipher direction).

Parameters:

cipherKey - the cipher key (128, 192, or 256 bits).

keyBits - size of the cipher key in bits.

Throws:

java.lang.RuntimeException

encrypt

public final void encrypt(byte[] pt,
                          byte[] ct)

Encrypt exactly one block (BLOCK_SIZE bytes) of plaintext.

Parameters:

pt - plaintext block.

ct - ciphertext block.

decrypt

public final void decrypt(byte[] ct,
                          byte[] pt)

Decrypt exactly one block (BLOCK_SIZE bytes) of ciphertext.

Parameters:

ct - ciphertext block.

pt - plaintext block.

finalize

public final void finalize()

Destroy all sensitive information in this object.

Overrides:

finalize in class java.lang.Object