signcrypt

Documentation

Overview

Package signcrypt implements an integrated signcryption scheme using Ristretto255 and Newplex.

Index

• Constants
• func Open(domain string, dR *ristretto255.Scalar, qS *ristretto255.Element, ...) ([]byte, error)
• func Seal(domain string, dS *ristretto255.Scalar, qR *ristretto255.Element, ...) []byte

Constants

const Overhead = 32 + 32 + 32

Overhead is the length, in bytes, of the additional data added to a plaintext to produce a signcrypted ciphertext.

Functions

func Open

func Open(domain string, dR *ristretto255.Scalar, qS *ristretto255.Element, ciphertext []byte) ([]byte, error)

Open decrypts and verifies a ciphertext produced by Seal. Returns either the confidential, authentic plaintext or newplex.ErrInvalidCiphertext.

func Seal

func Seal(domain string, dS *ristretto255.Scalar, qR *ristretto255.Element, rand, message []byte) []byte

Seal encrypts and signs the message to protect its confidentiality and authenticity. Only the owner of the receiver's private key can decrypt it, and only the owner of the sender's private key could have sent it.