PRESENT.go

Go implementation of the PRESENT ultra-lightweight block cipher as defined by Bogdanov et al. [1].

Not to be confused with the Go presentation tool package and command.

Usage

This package implements the cipher.Block interface from crypto/cipher, so it can be used with the block cipher modes implemented there, just like the crypto/aes package.

Example

One of the test vectors from the PRESENT paper:

package main
import (
    "encoding/hex"
    "fmt"
    "log"
    "github.com/yi-jiayu/PRESENT.go"
)
func encodeHex(data []byte) string {
    dst := make([]byte, hex.EncodedLen(len(data)))
    hex.Encode(dst, data)
    return string(dst)
}
func main() {
    key := make([]byte, 10)
    fmt.Printf("%-10s : %s\n", "Key", encodeHex(key))
    cipher, err := present.NewCipher(key)
    if err != nil {
        log.Fatal(err)
    }
    plaintext := make([]byte, 8)
    fmt.Printf("%-10s : %s\n", "Plaintext", encodeHex(plaintext))
    ciphertext := make([]byte, 8)
    cipher.Encrypt(ciphertext, plaintext)
    fmt.Printf("%-10s : %s\n", "Ciphertext", encodeHex(ciphertext))
}

Output:

Key        : 00000000000000000000
Plaintext  : 0000000000000000
Ciphertext : 5579c1387b228445

References

1. Bogdanov A. et al. (2007) PRESENT: An Ultra-Lightweight Block Cipher. In: Paillier P., Verbauwhede I. (eds) Cryptographic Hardware and Embedded Systems - CHES 2007. CHES 2007. Lecture Notes in Computer Science, vol 4727. Springer, Berlin, Heidelberg (pdf)