aesffx

README

perm-crypt

A Golang implementation of the AES-FFX Format-Preserving Encryption Scheme

Installation

$ go get github.com/roasbeef/perm-crypt

Example Usage

key, _ := hex.DecodeString("2b7e151628aed2a6abf7158809cf4f3c")

tweak := []byte("9876543210")

plainString := "0123456789"

ffx, _ := aesffx.NewCipher(10, key, tweak)

cipher, _ := ffx.Encrypt(plainString)

plain, _ := ffx.Decrypt(cipher)
	

---

WARNING: You probably shouldn't use this in a production environment. This lib was created primarily as yak-shaving for a research project.

Documentation

Index

• type FFXCipher
  • func NewCipher(radix uint32, key, tweak []byte) (*FFXCipher, error)
  • func (f FFXCipher) Decrypt(src string) (string, error)
  • func (f FFXCipher) Encrypt(src string) (string, error)

Types

type FFXCipher

type FFXCipher struct {
	// contains filtered or unexported fields
}

FFXCipher represents the parameters needed for AES-FFX.

func NewCipher

func NewCipher(radix uint32, key, tweak []byte) (*FFXCipher, error)

NewCipher creates a new cipher capable of encrypting and decrypting messages using the AES-FFX mode for format-preserving encryption.

func (FFXCipher) Decrypt

func (f FFXCipher) Decrypt(src string) (string, error)

Decrypt decrypts the given ciphertext, producing plaintext output.

func (FFXCipher) Encrypt

func (f FFXCipher) Encrypt(src string) (string, error)

Encrypt encrypts the given plaintext, producing ciphertext output.