Blowfish example

gistfile1.go

package main

import (
    "code.google.com/p/go.crypto/blowfish"
	"crypto/cipher"
	"encoding/hex"
	"fmt"
)

func EncryptBlowfish(dst, src, key, iv []byte) error {
	bBlockEncrypter, err := blowfish.NewCipher([]byte(key))
	if err != nil {
		fmt.Println(err)
		return err
	}

	bEncrypter := cipher.NewCFBEncrypter(bBlockEncrypter, iv)
	bEncrypter.XORKeyStream(dst, src)
	return nil
}

func DecryptBlowfish(dst, src, key, iv []byte) error {
	bBlockDecrypter, err := blowfish.NewCipher([]byte(key))
	if err != nil {
		fmt.Println(err)
		return err
	}

	bDecrypter := cipher.NewCFBDecrypter(bBlockDecrypter, iv)
	bDecrypter.XORKeyStream(dst, src)
	return nil
}

func main() {
	key := "secret key"
	msg := "ultra secret message"
	var iv = []byte(key)[:blowfish.BlockSize]
	var err error

	encrypted := make([]byte, len(msg))
	decrypted := make([]byte, len(msg))

	err = EncryptBlowfish(encrypted, []byte(msg), []byte(key), iv)
	if err != nil {
		panic(err)
	}
	fmt.Println(encrypted)
	fmt.Println(hex.EncodeToString(encrypted))

	err = DecryptBlowfish(decrypted, encrypted, []byte(key), iv)
	if err != nil {
		panic(err)
	}
	fmt.Println(string(decrypted))

}