padding

Documentation

Index

• func IntToBinary(i int) []byte
• func Length(maxlen int, nonce, key []byte) int
• func Pad(pt []byte, padlen int) []byte
• func Unpad(paddedpt []byte, padlen int) ([]byte, error)

Functions

func IntToBinary

func IntToBinary(i int) []byte

IntToBinary encodes i into a byte slice as uint32. It panics if i is not a valid uint32.

func Length

func Length(maxlen int, nonce, key []byte) int

Length calculates length of padding for given nonce and key in range [0:maxlen). maxlen must be a power of two and maxlen < 2^32-1.

func Pad

func Pad(pt []byte, padlen int) []byte

Pad prepends padlen zero bytes to pt.

func Unpad

func Unpad(paddedpt []byte, padlen int) ([]byte, error)

Uppad removes first padlen bytes of paddedpt.