pmac

package

v1.0.2065 Latest Latest Go to latest Published: Apr 26, 2024 License: Apache-2.0 Imports: 5 Imported by: 0

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Repository

github.com/deatil/go-cryptobin

Links

Open Source Insights

Documentation ¶

Overview ¶

PMAC message authentication code, defined in http://web.cs.ucdavis.edu/~rogaway/ocb/pmac.pdf

Index ¶

Constants
func New(c cipher.Block) (hash.Hash, error)
func NewWithTagSize(c cipher.Block, tagsize int) (hash.Hash, error)
func Sum(msg []byte, c cipher.Block, tagsize int) ([]byte, error)
func Verify(mac, msg []byte, c cipher.Block, tagsize int) bool
type Block
- func NewBlock(size int) Block

Constants ¶

View Source

const (
	// R is the minimal irreducible polynomial for a 128-bit block size
	R = 0x87
)

Variables ¶

This section is empty.

Functions ¶

func New ¶

func New(c cipher.Block) (hash.Hash, error)

New creates a new PMAC instance using the given cipher

func NewWithTagSize ¶

func NewWithTagSize(c cipher.Block, tagsize int) (hash.Hash, error)

NewWithTagSize returns a hash.Hash computing the PMAC checksum with the given tag size. The tag size must between the 1 and the cipher's block size.

func Sum ¶

func Sum(msg []byte, c cipher.Block, tagsize int) ([]byte, error)

Sum computes the PMAC checksum with the given tagsize of msg using the cipher.Block.

func Verify ¶

func Verify(mac, msg []byte, c cipher.Block, tagsize int) bool

Verify computes the PMAC checksum with the given tagsize of msg and compares it with the given mac. This functions returns true if and only if the given mac is equal to the computed one.

Types ¶

type Block ¶

type Block struct {
	Data []byte

	Size int
}

Block is a 128-bit array used by certain block ciphers (i.e. AES)

func NewBlock ¶

func NewBlock(size int) Block

func (*Block) Clear ¶

func (b *Block) Clear()

Clear zeroes out the contents of the block

func (*Block) Dbl ¶

func (b *Block) Dbl()

Dbl performs a doubling of a block over GF(2^128):

a<<1 if firstbit(a)=0
(a<<1) ⊕ 0¹²⁰10000111 if firstbit(a)=1

func (*Block) Encrypt ¶

func (b *Block) Encrypt(c cipher.Block)

Encrypt a block with the given block cipher

Source Files ¶

View all Source files

Directories ¶

Path	Synopsis
aes Package aes implements the PMAC MAC with the AES.	Package aes implements the PMAC MAC with the AES.

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