CMac class

CMAC - as specified at www.nuee.nagoya-u.ac.jp/labs/tiwata/omac/omac.html

CMAC is analogous to OMAC1 - see also en.wikipedia.org/wiki/CMAC

CMAC is a NIST recomendation - see csrc.nist.gov/CryptoToolkit/modes/800-38_Series_Publications/SP800-38B.pdf

CMAC/OMAC1 is a blockcipher-based message authentication code designed and analyzed by Tetsu Iwata and Kaoru Kurosawa.

CMAC/OMAC1 is a simple variant of the CBC MAC (Cipher Block Chaining Message Authentication Code). OMAC stands for One-Key CBC MAC.

It supports 128- or 64-bits block ciphers, with any key size, and returns a MAC with dimension less or equal to the block size of the underlying cipher.

Implemented types

• Mac

Constructors

CMac(BlockCipher cipher, int macSizeInBits)

create a standard MAC based on a block cipher with the size of the MAC been given in bits.

CMac.fromCipher(BlockCipher cipher)

create a standard MAC based on a CBC block cipher (64 or 128 bit block). This will produce an authentication code the length of the block size of the cipher.

Properties

algorithmName → String

Get this algorithm's standard name.

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

macSize → int

Get this MAC's output size.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

doFinal(Uint8List out, int outOff) → int

Store the MAC of previously given data in buffer out starting at offset outOff. This method returns the size of the digest.

override

init(covariant KeyParameter keyParams) → void

Init the MAC with its initialization params. The type of CipherParameters depends on the algorithm being used (see the documentation of each implementation to find out more).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

process(Uint8List data) → Uint8List

Process a whole block of data at once, returning the result in a new byte array.

inherited

reset() → void

Reset the mac generator.

override

toString() → String

A string representation of this object.

inherited

update(Uint8List inp, int inOff, int len) → void

Add len bytes of data contained in inp, starting at position inpOff to the MAC'ed input.

override

updateByte(int inp) → void

Add one byte of data to the MAC input.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Properties

factoryConfig → FactoryConfig

final

Static Methods

lookupPoly(int blockSizeLength) → Uint8List

shiftLeft(Uint8List block, Uint8List output) → int