internal

Documentation

Overview

Package internal contains various helper functions for writing STROBE protocols.

The subpackages of internal contain all the various STROBE protocols Veil uses.

Index

• Constants
• Variables
• func ASCIIDecode(text []byte) ([]byte, error)
• func ASCIIEncode(data []byte) []byte
• func IntN(max int) (int, error)
• func SliceForAppend(in []byte, n int) (head, tail []byte)

Constants

const (
	// MACSize is the MAC size in bytes.
	MACSize = 16

	// ElementSize is the length of an encoded ristretto255 element.
	ElementSize = 32

	// ScalarSize is the length of an encoded ristretto255 scalar.
	ScalarSize = 32

	// UniformBytestringSize is the length of a uniform bytestring which can be mapped to either a
	// ristretto255 element or scalar.
	UniformBytestringSize = 64
)

Variables

var ErrInvalidCiphertext = errors.New("invalid ciphertext")

ErrInvalidCiphertext is returned when the ciphertext cannot be decrypted.

Functions

func ASCIIDecode

func ASCIIDecode(text []byte) ([]byte, error)

ASCIIDecode decodes the given base58 text.

func ASCIIEncode

func ASCIIEncode(data []byte) []byte

ASCIIEncode returns the given data, encoded in base58.

func IntN

func IntN(max int) (int, error)

IntN returns a cryptographically random integer selected uniformly from [0,max).

func SliceForAppend

func SliceForAppend(in []byte, n int) (head, tail []byte)

SliceForAppend takes a slice and a requested number of bytes. It returns a slice with the contents of the given slice followed by that many bytes and a second slice that aliases into it and contains only the extra bytes. If the original slice has sufficient capacity then no allocation is performed.