lazyxchacha

lazyxchacha

Lazy XChaCha20-Poly1305 in golang base on golang.org/x/crypto.

Algorithm details

• Key exchange: X25519
• Encryption: XChaCha20
• Authentication: Poly1305

Install

go get github.com/prongbang/lazyxchacha

Benchmark

goos: darwin
goarch: arm64
cpu: Apple M4 Pro
BenchmarkEncrypt-12         	 1882269	       621.3 ns/op
BenchmarkDecrypt-12         	 2717778	       432.8 ns/op
BenchmarkEncryptBytes-12    	 2503562	       471.8 ns/op
BenchmarkDecryptBytes-12    	 3929430	       301.2 ns/op

How to use

• Generate KeyPair

keyPair := lazyxchacha.NewKeyPair()

• Key Exchange

// Generate KeyPair
clientKp := lazyxchacha.NewKeyPair()
serverKp := lazyxchacha.NewKeyPair()

serverKx := serverKp.Exchange(clientKp.Pk)
clientKx := clientKp.Exchange(serverKp.Pk)

• Shared Key

serverSharedKey, _ := serverKx.Secret()
clientSharedKey, _ := clientKx.Secret()

• Encrypt

lazyXchacha := lazyxchacha.New()
sharedKey, _ := clientKx.Secret()
key, _ := hex.DecodeString(sharedKey)
plaintext := "text"
ciphertext, err := lazyXchacha.Encrypt(plaintext, key)

• Decrypt

lazyXchacha := lazyxchacha.New()
sharedKey, _ := serverKx.Secret()
key, _ := hex.DecodeString(sharedKey)
ciphertext := "f6a1bd8"
plaintext, err := lazyXchacha.Decrypt(ciphertext, key)