Documentation

Overview

    Package salsa20 implements the Salsa20 stream cipher as specified in https://cr.yp.to/snuffle/spec.pdf.

    Salsa20 differs from many other stream ciphers in that it is message orientated rather than byte orientated. Keystream blocks are not preserved between calls, therefore each side must encrypt/decrypt data with the same segmentation.

    Another aspect of this difference is that part of the counter is exposed as a nonce in each call. Encrypting two different messages with the same (key, nonce) pair leads to trivial plaintext recovery. This is analogous to encrypting two different messages with the same key with a traditional stream cipher.

    This package also implements XSalsa20: a version of Salsa20 with a 24-byte nonce as specified in https://cr.yp.to/snuffle/xsalsa-20081128.pdf. Simply passing a 24-byte slice as the nonce triggers XSalsa20.

    Index

    Constants

    This section is empty.

    Variables

    This section is empty.

    Functions

    func XORKeyStream

    func XORKeyStream(out, in []byte, nonce []byte, key *[32]byte)

      XORKeyStream crypts bytes from in to out using the given key and nonce. In and out must overlap entirely or not at all. Nonce must be either 8 or 24 bytes long.

      Types

      This section is empty.

      Source Files

      Directories

      Path Synopsis
      Package salsa provides low-level access to functions in the Salsa family.
      Package salsa provides low-level access to functions in the Salsa family.