aead_test.go

// aead_test.go - AEAD_CHACHA20_POLY1305 implementation tests.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to chacha20poly1305, using the Creative
// Commons "CC0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.

package chacha20poly1305

import (
	"bytes"
	"testing"
)

func TestChaCha20Poly1305(t *testing.T) {
	// Test vector taken from RFC 7539.
	key := []byte{
		0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
		0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
		0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
		0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
	}
	nonce := []byte{
		// "32-bit fixed common part"
		0x07, 0x00, 0x00, 0x00,

		// "IV"
		0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
	}
	aad := []byte{
		0x50, 0x51, 0x52, 0x53, 0xc0, 0xc1, 0xc2, 0xc3,
		0xc4, 0xc5, 0xc6, 0xc7,
	}
	vecPlaintext := []byte{
		0x4c, 0x61, 0x64, 0x69, 0x65, 0x73, 0x20, 0x61,
		0x6e, 0x64, 0x20, 0x47, 0x65, 0x6e, 0x74, 0x6c,
		0x65, 0x6d, 0x65, 0x6e, 0x20, 0x6f, 0x66, 0x20,
		0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x61, 0x73,
		0x73, 0x20, 0x6f, 0x66, 0x20, 0x27, 0x39, 0x39,
		0x3a, 0x20, 0x49, 0x66, 0x20, 0x49, 0x20, 0x63,
		0x6f, 0x75, 0x6c, 0x64, 0x20, 0x6f, 0x66, 0x66,
		0x65, 0x72, 0x20, 0x79, 0x6f, 0x75, 0x20, 0x6f,
		0x6e, 0x6c, 0x79, 0x20, 0x6f, 0x6e, 0x65, 0x20,
		0x74, 0x69, 0x70, 0x20, 0x66, 0x6f, 0x72, 0x20,
		0x74, 0x68, 0x65, 0x20, 0x66, 0x75, 0x74, 0x75,
		0x72, 0x65, 0x2c, 0x20, 0x73, 0x75, 0x6e, 0x73,
		0x63, 0x72, 0x65, 0x65, 0x6e, 0x20, 0x77, 0x6f,
		0x75, 0x6c, 0x64, 0x20, 0x62, 0x65, 0x20, 0x69,
		0x74, 0x2e,
	}
	vecCiphertext := []byte{
		0xd3, 0x1a, 0x8d, 0x34, 0x64, 0x8e, 0x60, 0xdb,
		0x7b, 0x86, 0xaf, 0xbc, 0x53, 0xef, 0x7e, 0xc2,
		0xa4, 0xad, 0xed, 0x51, 0x29, 0x6e, 0x08, 0xfe,
		0xa9, 0xe2, 0xb5, 0xa7, 0x36, 0xee, 0x62, 0xd6,
		0x3d, 0xbe, 0xa4, 0x5e, 0x8c, 0xa9, 0x67, 0x12,
		0x82, 0xfa, 0xfb, 0x69, 0xda, 0x92, 0x72, 0x8b,
		0x1a, 0x71, 0xde, 0x0a, 0x9e, 0x06, 0x0b, 0x29,
		0x05, 0xd6, 0xa5, 0xb6, 0x7e, 0xcd, 0x3b, 0x36,
		0x92, 0xdd, 0xbd, 0x7f, 0x2d, 0x77, 0x8b, 0x8c,
		0x98, 0x03, 0xae, 0xe3, 0x28, 0x09, 0x1b, 0x58,
		0xfa, 0xb3, 0x24, 0xe4, 0xfa, 0xd6, 0x75, 0x94,
		0x55, 0x85, 0x80, 0x8b, 0x48, 0x31, 0xd7, 0xbc,
		0x3f, 0xf4, 0xde, 0xf0, 0x8e, 0x4b, 0x7a, 0x9d,
		0xe5, 0x76, 0xd2, 0x65, 0x86, 0xce, 0xc6, 0x4b,
		0x61, 0x16,
	}
	vecTag := []byte{
		0x1a, 0xe1, 0x0b, 0x59, 0x4f, 0x09, 0xe2, 0x6a,
		0x7e, 0x90, 0x2e, 0xcb, 0xd0, 0x60, 0x06, 0x91,
	}

	a, err := New(key)
	if err != nil {
		t.Fatalf("Failed to instantiate AEAD instance: %v", err)
	}

	ciphertext := a.Seal(nil, nonce, vecPlaintext, aad)
	if !bytes.Equal(ciphertext[len(vecCiphertext):], vecTag) {
		t.Fatalf("Seal: Tag mismatch")
	}
	if !bytes.Equal(ciphertext[:len(vecCiphertext)], vecCiphertext) {
		t.Fatalf("Seal: Ciphertext mismatch")
	}

	plaintext, err := a.Open(nil, nonce, ciphertext, aad)
	if err != nil {
		t.Fatalf("Open: Failed")
	}
	if !bytes.Equal(plaintext, vecPlaintext) {
		t.Fatalf("Open: Plaintext mismatch")
	}
}

func benchmarkChaCha20Poly1305Seal(b *testing.B, n int) {
	var key [KeySize]byte
	var nonce [NonceSize]byte

	a, err := New(key[:])
	if err != nil {
		b.Fatalf("Failed to instantiate AEAD instance: %v", err)
	}

	var ad [13]byte // The crypto/cipher benchmarks use this size.
	plaintext := make([]byte, n)
	b.SetBytes(int64(n))
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_ = a.Seal(nil, nonce[:], plaintext, ad[:])
	}
}

func benchmarkChaCha20Poly1305Open(b *testing.B, n int) {
	var key [KeySize]byte
	var nonce [NonceSize]byte

	a, err := New(key[:])
	if err != nil {
		b.Fatalf("Failed to instantiate AEAD instance: %v", err)
	}

	plaintext := make([]byte, n)
	var ad [13]byte // The crypto/cipher benchmarks use this size.
	ciphertext := a.Seal(nil, nonce[:], plaintext, ad[:])
	b.SetBytes(int64(n))
	b.ResetTimer()

	b.SetBytes(int64(n))
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		_, err := a.Open(plaintext[:0], nonce[:], ciphertext, ad[:])
		if err != nil {
			b.Fatalf("Failed to open ciphertext: %v", err)
		}
	}
}

func BenchmarkChaCha20Poly1305Seal1K(b *testing.B) {
	benchmarkChaCha20Poly1305Seal(b, 1024)
}

func BenchmarkChaCha20Poly1305Open1K(b *testing.B) {
	benchmarkChaCha20Poly1305Open(b, 1024)
}

func BenchmarkChaCha20Poly1305Seal4K(b *testing.B) {
	benchmarkChaCha20Poly1305Seal(b, 4096)
}

func BenchmarkChaCha20Poly1305Open4K(b *testing.B) {
	benchmarkChaCha20Poly1305Open(b, 4096)
}

func BenchmarkChaCha20Poly1305Seal8K(b *testing.B) {
	benchmarkChaCha20Poly1305Seal(b, 8192)
}

func BenchmarkChaCha20Poly1305Open8K(b *testing.B) {
	benchmarkChaCha20Poly1305Open(b, 8192)
}