package eme

// Test using EME-32 test vectors

import (
	"bytes"
	"crypto/aes"
	"encoding/hex"
	"fmt"
	"testing"
)

type testVec struct {
	// direction
	dir directionConst
	// AES key
	key []byte
	// IV, in EME called tweak
	tweak []byte
	// input data
	in []byte
	// expected output data
	out []byte
}

func verifyTestVec(v testVec, t *testing.T) {
	bc, err := aes.NewCipher(v.key)
	if err != nil {
		t.Fatal(err)
	}

	// Transform and check expected data
	out := Transform(bc, v.tweak, v.in, v.dir)
	if bytes.Compare(v.out, out) != 0 {
		fmt.Println(hex.EncodeToString(out))
		t.Errorf("Different content in forward verify")
	}
	// Transform the other way and check that we get back the original data
	in := Transform(bc, v.tweak, out, !v.dir)
	if bytes.Compare(v.in, in) != 0 {
		fmt.Println(hex.EncodeToString(out))
		t.Errorf("Different content in reverse verify")
	}

	// Once more using the eme.New() interface.
	e := New(bc)
	if v.dir == DirectionDecrypt {
		out = e.Decrypt(v.tweak, v.in)
		in = e.Encrypt(v.tweak, out)
	} else {
		out = e.Encrypt(v.tweak, v.in)
		in = e.Decrypt(v.tweak, out)
	}
	if bytes.Compare(v.out, out) != 0 {
		fmt.Println(hex.EncodeToString(out))
		t.Errorf("Different content in forward verify")
	}
	if bytes.Compare(v.in, in) != 0 {
		fmt.Println(hex.EncodeToString(out))
		t.Errorf("Different content in reverse verify")
	}
}

// EME-32 encryption test vector from http://grouper.ieee.org/groups/1619/email/pdf00020.pdf
var buf9F2E = []byte{
	0x9F, 0x2E, 0x6C, 0x3D, 0xAE, 0xCA, 0xE7, 0x9E, 0x88, 0x39, 0xB0, 0x58, 0x8F, 0xF3, 0x78, 0xCD,
	0x06, 0x68, 0x97, 0x0B, 0x95, 0x69, 0x1C, 0xB0, 0x01, 0x82, 0xB9, 0xE3, 0x4C, 0xD6, 0x58, 0xED,
	0x3C, 0x9C, 0x27, 0x68, 0x38, 0xCC, 0x5E, 0x14, 0x11, 0xFC, 0xB8, 0xCF, 0x3D, 0xA1, 0xC0, 0xF3,
	0x08, 0x75, 0x80, 0x4C, 0x9D, 0xF5, 0x11, 0x57, 0xB0, 0x79, 0x11, 0x00, 0xD2, 0x55, 0x13, 0x34,
	0x83, 0x4C, 0xF4, 0x02, 0x4F, 0x6B, 0x71, 0x8F, 0xBC, 0x7D, 0xAB, 0xA0, 0x7D, 0x14, 0xEB, 0x7C,
	0xBC, 0x79, 0xC2, 0x61, 0xB1, 0xEB, 0x03, 0x6D, 0x0C, 0x9F, 0x85, 0xB9, 0x14, 0x38, 0x58, 0x40,
	0x72, 0x72, 0x84, 0x00, 0x5F, 0x06, 0xA9, 0xC1, 0x62, 0x7C, 0x0B, 0x7F, 0xB1, 0x2A, 0x1F, 0x81,
	0xFA, 0x83, 0xC4, 0xB0, 0x35, 0xDB, 0x00, 0x6C, 0xCE, 0x84, 0x6D, 0x07, 0x56, 0xDB, 0x9F, 0xB2,
	0x44, 0x8E, 0xE5, 0x62, 0x8D, 0x23, 0x76, 0xEE, 0x13, 0x95, 0x42, 0x13, 0xDB, 0x3D, 0xCA, 0x72,
	0x5F, 0x2C, 0x67, 0x95, 0x0E, 0xAF, 0x2C, 0xDA, 0xC8, 0xA2, 0x7A, 0x04, 0x33, 0xA1, 0x4C, 0x96,
	0x92, 0x7D, 0x91, 0x45, 0xDD, 0x93, 0xE0, 0xB4, 0x6E, 0x67, 0x0F, 0x6C, 0x4D, 0xB8, 0xAD, 0xD0,
	0x14, 0xB8, 0x88, 0x0E, 0xFB, 0x9A, 0x97, 0xBE, 0xC5, 0xCD, 0x05, 0xBB, 0xA4, 0x3D, 0xCC, 0x35,
	0x05, 0x80, 0x45, 0xAE, 0x81, 0x68, 0xDF, 0x6E, 0x67, 0x77, 0x91, 0x98, 0xFC, 0xC7, 0x28, 0x08,
	0xCE, 0x29, 0xC7, 0xB5, 0xAE, 0xFD, 0xBC, 0x9E, 0x3E, 0xE6, 0x51, 0x17, 0x28, 0x3B, 0xFA, 0x2E,
	0x19, 0x5F, 0x82, 0xCE, 0x19, 0x62, 0xDD, 0x81, 0x12, 0xCB, 0x57, 0xE8, 0x04, 0x0D, 0x77, 0x67,
	0x33, 0xD3, 0xBB, 0x33, 0x1E, 0xA6, 0x30, 0x0F, 0x91, 0xDE, 0xE0, 0xCB, 0xEB, 0x2F, 0xC9, 0xAF,
	0xD3, 0x41, 0xF5, 0x51, 0x5E, 0x22, 0x37, 0x1E, 0x44, 0x2B, 0x86, 0xE7, 0x02, 0x87, 0x54, 0x6A,
	0x16, 0x6E, 0xC2, 0xAE, 0xF8, 0x9F, 0x29, 0x1B, 0xE6, 0x2A, 0xFC, 0x2A, 0x96, 0x89, 0x1E, 0x44,
	0x6E, 0xF6, 0xF1, 0x62, 0x73, 0x55, 0x74, 0xD1, 0x0C, 0xFF, 0x4A, 0x18, 0x3D, 0xE2, 0x76, 0x0B,
	0x5E, 0x14, 0x5D, 0xEA, 0xAD, 0x3E, 0xFD, 0xE1, 0xDA, 0x4B, 0x28, 0x36, 0xC6, 0x65, 0xC5, 0xEC,
	0x4B, 0x54, 0xCB, 0x98, 0x9D, 0x27, 0x73, 0x11, 0xC4, 0x2D, 0xB4, 0x86, 0x2D, 0xB2, 0x92, 0x0C,
	0x39, 0x42, 0x95, 0x8E, 0x54, 0xF6, 0x4E, 0x36, 0x5E, 0x52, 0x19, 0x0E, 0xD8, 0x1A, 0x02, 0xD7,
	0x3B, 0xF7, 0x8A, 0x8A, 0xE5, 0xCC, 0x83, 0xE0, 0x32, 0x03, 0xEF, 0x42, 0x16, 0x14, 0xB7, 0x9A,
	0xE9, 0x84, 0xB6, 0x7E, 0xE9, 0x34, 0x83, 0xD5, 0xEB, 0x1E, 0xA7, 0xB4, 0xFD, 0x95, 0x4C, 0xC3,
	0x50, 0x59, 0xBD, 0x4D, 0x93, 0x2E, 0xF3, 0x42, 0x71, 0x82, 0x50, 0x45, 0xD7, 0x3E, 0xFF, 0xEF,
	0x2E, 0xD3, 0x48, 0x98, 0x71, 0xFD, 0xA2, 0xCC, 0x73, 0x92, 0x4B, 0x4D, 0x45, 0x9D, 0x1C, 0x6E,
	0xE5, 0x25, 0x42, 0x1E, 0x05, 0x50, 0xD3, 0xAB, 0x87, 0x6F, 0x61, 0x53, 0x95, 0xAC, 0x4A, 0x54,
	0xD2, 0x04, 0x78, 0xA4, 0x42, 0xD8, 0x5C, 0x9A, 0x3C, 0x9C, 0x7F, 0xA1, 0x48, 0xF2, 0xB9, 0xDC,
	0xAD, 0xAA, 0x83, 0xCF, 0x40, 0xE9, 0xE4, 0x64, 0xDA, 0x60, 0x36, 0xA5, 0x5C, 0xDB, 0x87, 0x3B,
	0x50, 0xC1, 0x06, 0x0E, 0xCC, 0x27, 0xB4, 0x8D, 0xC0, 0xAF, 0xC7, 0x6E, 0xF7, 0x3F, 0x14, 0x89,
	0x28, 0x1C, 0x08, 0xEF, 0xCE, 0x7F, 0xEC, 0x47, 0xED, 0xD8, 0x23, 0xF2, 0xF5, 0x62, 0xB3, 0x33,
	0xAC, 0x20, 0x9C, 0x2C, 0xD3, 0xCC, 0x57, 0x7C, 0x28, 0xEE, 0xDA, 0xAF, 0xCE, 0xDD, 0x89, 0xA6}

func TestEnc512(t *testing.T) {
	var v testVec
	v.dir = DirectionEncrypt
	v.key = make([]byte, 32)   // all-zero
	v.tweak = make([]byte, 16) // all-zero
	v.in = make([]byte, 512)   // all-zero
	v.out = buf9F2E
	verifyTestVec(v, t)
}

// Test vectors from http://grouper.ieee.org/groups/1619/email/msg00218.html
// Encrypt 100 times
func TestEnc512x100(t *testing.T) {
	var v testVec
	v.dir = DirectionEncrypt
	v.key = []byte{
		0x9F, 0x2E, 0x6C, 0x3D, 0xAE, 0xCA, 0xE7, 0x9E, 0x88, 0x39, 0xB0, 0x58, 0x8F, 0xF3, 0x78, 0xCD,
		0x06, 0x68, 0x97, 0x0B, 0x95, 0x69, 0x1C, 0xB0, 0x01, 0x82, 0xB9, 0xE3, 0x4C, 0xD6, 0x58, 0xED}
	v.tweak = []byte{
		0x3C, 0x9C, 0x27, 0x68, 0x38, 0xCC, 0x5E, 0x14, 0x11, 0xFC, 0xB8, 0xCF, 0x3D, 0xA1, 0xC0, 0xF3}
	v.in = buf9F2E
	v.out = []byte{
		0x36, 0x00, 0x8C, 0x95, 0xE7, 0x32, 0xA2, 0x31, 0x94, 0x93, 0x7C, 0xC4, 0xDD, 0xED, 0x30, 0xFF,
		0xEE, 0x0F, 0xF6, 0x00, 0xF3, 0xEE, 0x87, 0x96, 0xA5, 0x8A, 0xF9, 0xBB, 0x12, 0x4A, 0xD0, 0x28,
		0x50, 0xFB, 0x30, 0xFA, 0xC7, 0x83, 0x16, 0xA6, 0x46, 0x93, 0xAC, 0xD3, 0x86, 0x02, 0xE4, 0xC7,
		0x04, 0xA4, 0x15, 0x2F, 0xB2, 0xD4, 0x38, 0x3E, 0xEB, 0x1D, 0x85, 0xB1, 0x0F, 0x9E, 0x39, 0xBE,
		0x8D, 0x61, 0x9F, 0x68, 0x93, 0x03, 0xA5, 0xB9, 0xC3, 0xF7, 0xD8, 0x9B, 0xAA, 0x6F, 0x2E, 0x43,
		0xAF, 0xAA, 0x0B, 0xD2, 0xAC, 0x34, 0x52, 0xDA, 0x6A, 0xA2, 0x0F, 0xFF, 0x33, 0xED, 0xB8, 0xF3,
		0x07, 0x24, 0x7D, 0x05, 0x5E, 0xCB, 0xB6, 0xE4, 0xB5, 0x39, 0xC2, 0xC5, 0x30, 0x88, 0xDD, 0xA4,
		0x99, 0xB5, 0xD9, 0x67, 0xF9, 0x8B, 0xCE, 0xC4, 0xA5, 0x4F, 0x4D, 0x27, 0x26, 0x43, 0xE1, 0x3C,
		0x42, 0x26, 0xF6, 0x9E, 0xE6, 0x27, 0xA0, 0x4F, 0x3A, 0xAE, 0xA0, 0x7E, 0x03, 0x3D, 0x3C, 0x4F,
		0x88, 0xA6, 0x50, 0x9C, 0x72, 0x75, 0x88, 0xB1, 0x52, 0xCA, 0x41, 0x41, 0x5D, 0x69, 0x7F, 0xDF,
		0xDD, 0x44, 0x0B, 0x23, 0x86, 0xBB, 0x9A, 0x57, 0x70, 0xCA, 0x28, 0x1C, 0x22, 0x07, 0xD3, 0xEB,
		0x9B, 0x27, 0xFC, 0x6A, 0x2E, 0x48, 0x2E, 0x79, 0x95, 0x88, 0xC7, 0x7B, 0x6B, 0xA3, 0xA1, 0xA4,
		0x66, 0x0E, 0x77, 0xED, 0x70, 0x8A, 0x65, 0xDF, 0x22, 0x86, 0x37, 0x04, 0xBB, 0xE9, 0x44, 0x29,
		0x21, 0x78, 0x36, 0x28, 0x92, 0x86, 0x48, 0x62, 0xD3, 0xC9, 0xA1, 0x8D, 0xD7, 0x04, 0x20, 0xC8,
		0x87, 0xE9, 0x58, 0xA4, 0x30, 0x6E, 0xC8, 0x4F, 0xE7, 0xF6, 0x6D, 0xDC, 0xDE, 0xBA, 0x5B, 0xEE,
		0xDA, 0xB0, 0x32, 0xFB, 0xE8, 0xD4, 0xDD, 0xC4, 0x5B, 0xD4, 0x84, 0x34, 0x9F, 0xD4, 0xCF, 0xF5,
		0xD7, 0x29, 0x90, 0x5F, 0xB5, 0x60, 0xAC, 0x02, 0xBA, 0x1C, 0x83, 0xD8, 0xC5, 0xB7, 0x1F, 0x70,
		0x72, 0x8F, 0x90, 0xD1, 0xD3, 0x5D, 0xB3, 0x65, 0x1A, 0x30, 0x3F, 0x9D, 0xB9, 0xB5, 0x3F, 0xEB,
		0x99, 0x19, 0x44, 0x05, 0xA0, 0x85, 0xF5, 0x43, 0x4E, 0xD1, 0xBB, 0x4E, 0x07, 0x17, 0x22, 0x37,
		0x61, 0x31, 0x63, 0x38, 0x27, 0xC5, 0x4B, 0x86, 0x15, 0x3C, 0x79, 0x28, 0xE5, 0xD9, 0xE5, 0x83,
		0x58, 0xEF, 0x4A, 0x2E, 0xFE, 0xFE, 0x16, 0x5E, 0x94, 0xFE, 0xC5, 0xC2, 0xF0, 0x69, 0x91, 0xD9,
		0xF6, 0x1E, 0xB4, 0xD0, 0xE6, 0xFA, 0x5A, 0x28, 0xD6, 0xED, 0x62, 0x21, 0x6E, 0x4A, 0xDC, 0x2B,
		0x50, 0x7A, 0xE2, 0x3F, 0x25, 0x61, 0x88, 0xE7, 0x40, 0xD4, 0x25, 0xFD, 0xC8, 0x6E, 0x9B, 0x22,
		0x6C, 0xA8, 0xF0, 0x2F, 0x9D, 0x74, 0x60, 0xEE, 0x10, 0xCE, 0xB0, 0xCE, 0x73, 0x06, 0x90, 0x2B,
		0xB5, 0x39, 0x3E, 0x4C, 0x1F, 0xCF, 0xD9, 0x22, 0x6C, 0x57, 0x2C, 0x16, 0x96, 0xE1, 0x5F, 0xFC,
		0xBB, 0xE8, 0x9A, 0x9E, 0xA3, 0xE0, 0x9C, 0xFA, 0x2A, 0xB4, 0x63, 0xA3, 0x7B, 0xA6, 0xEB, 0xED,
		0xCC, 0x02, 0x59, 0x79, 0xFB, 0xC0, 0xED, 0xA8, 0x88, 0xDB, 0x93, 0xEC, 0xAA, 0xC4, 0x48, 0x69,
		0xA1, 0x76, 0xA9, 0x4E, 0x59, 0x56, 0x4E, 0xAF, 0xC8, 0xE9, 0x78, 0x1D, 0xDB, 0xCE, 0x6B, 0x74,
		0xC9, 0x84, 0xEC, 0x1F, 0x27, 0xF7, 0xB9, 0xC0, 0xE4, 0xAE, 0xB7, 0x14, 0xB1, 0x47, 0xE2, 0x79,
		0x34, 0xBF, 0x09, 0xA1, 0x5F, 0x90, 0x13, 0x29, 0x9A, 0x2D, 0x32, 0x07, 0x2A, 0x7C, 0x11, 0x2D,
		0x06, 0x48, 0x52, 0xE0, 0xC3, 0x34, 0x5D, 0x88, 0x34, 0xF1, 0x6F, 0x1F, 0xB2, 0x80, 0xB9, 0xEA,
		0xF8, 0x8C, 0xAD, 0xD4, 0x0C, 0xA2, 0x9C, 0x42, 0x86, 0x66, 0xCF, 0x53, 0x3F, 0xB0, 0x5C, 0x1E}

	bc, err := aes.NewCipher(v.key)
	if err != nil {
		t.Fatal(err)
	}
	out := v.in
	for i := 0; i < 100; i++ {
		out = Transform(bc, v.tweak, out, v.dir)
	}
	if bytes.Compare(v.out, out) != 0 {
		t.Errorf("Different content")
	}
}

// EME-32 decryption test vector from http://grouper.ieee.org/groups/1619/email/pdf00020.pdf
var buf0809 = []byte{
	0x08, 0x09, 0x05, 0xDE, 0xE8, 0xEB, 0xCC, 0x89, 0xF6, 0x8B, 0xD1, 0xAF, 0x63, 0x5D, 0xB3, 0xF5,
	0xB6, 0x0C, 0x2F, 0x13, 0xF7, 0xC7, 0x68, 0xFC, 0xEB, 0x12, 0x20, 0xF6, 0xC2, 0x27, 0xFD, 0x83,
	0x5F, 0x29, 0x3E, 0x85, 0xF1, 0xEA, 0xA8, 0xEE, 0x23, 0x22, 0xF5, 0x42, 0x91, 0xBF, 0x05, 0x1E,
	0x7B, 0x15, 0xAF, 0x84, 0xC7, 0xEA, 0xA4, 0xE8, 0x51, 0x58, 0xAF, 0x7F, 0x4E, 0x6F, 0xF2, 0x4A,
	0x62, 0xBA, 0xCF, 0xF6, 0xDB, 0xF9, 0x1F, 0x43, 0x3F, 0x3B, 0xD5, 0x64, 0xDF, 0xFB, 0xE9, 0xFE,
	0x1B, 0x0E, 0x14, 0xD2, 0x76, 0x87, 0x58, 0x94, 0x98, 0xD5, 0xE8, 0xCA, 0x11, 0xAC, 0xBA, 0x2B,
	0xC6, 0x01, 0x6D, 0x78, 0x23, 0xE3, 0x03, 0x6C, 0x61, 0xCE, 0x97, 0x77, 0xEC, 0x24, 0x45, 0x89,
	0x07, 0x79, 0x02, 0x7F, 0x7D, 0x49, 0x48, 0x93, 0xD9, 0x2F, 0x19, 0xBD, 0xFE, 0x16, 0x0E, 0xF8,
	0x2C, 0x36, 0x06, 0x9C, 0xA8, 0x87, 0xD8, 0x4E, 0xA0, 0x0C, 0xCC, 0x40, 0x13, 0x0C, 0xF7, 0xC4,
	0x11, 0x8C, 0x5D, 0x08, 0x22, 0xA5, 0xE1, 0xF4, 0x93, 0xCD, 0xAE, 0x96, 0xF5, 0x75, 0x20, 0x31,
	0xB4, 0x53, 0xE4, 0xCB, 0x86, 0x08, 0xC8, 0xF2, 0xBA, 0x2C, 0x78, 0xC9, 0x41, 0x12, 0x4C, 0x18,
	0xE3, 0x9F, 0x50, 0xAB, 0x74, 0xB8, 0x31, 0x47, 0xAA, 0x3F, 0xB8, 0x00, 0x53, 0x7E, 0xB9, 0xAC,
	0x55, 0xD7, 0x37, 0x55, 0x2E, 0x05, 0x03, 0x75, 0xF6, 0x07, 0xC5, 0x9B, 0x42, 0x13, 0xD8, 0x7E,
	0x58, 0xE8, 0xDA, 0x6E, 0x23, 0x02, 0x9C, 0x9C, 0xB8, 0x07, 0xAC, 0x63, 0x13, 0x3B, 0x9F, 0xDD,
	0xDA, 0xD8, 0x71, 0x2B, 0xD7, 0x82, 0x11, 0x37, 0xD9, 0xF8, 0xFD, 0xC3, 0xE2, 0x8A, 0xEB, 0x08,
	0xEE, 0x2F, 0xAE, 0x3E, 0xC1, 0xF8, 0x0D, 0x91, 0x26, 0xA3, 0xD2, 0xD0, 0xE4, 0xE4, 0xF1, 0xC6,
	0x42, 0x4C, 0xE6, 0xB5, 0xE9, 0x73, 0xE5, 0x27, 0x03, 0xAF, 0xB3, 0x1C, 0xEE, 0x79, 0x90, 0xDA,
	0x82, 0xB3, 0x16, 0x18, 0x9A, 0xD1, 0x6F, 0xE0, 0x59, 0x92, 0x1C, 0x60, 0xA9, 0x5A, 0x12, 0x08,
	0x71, 0x06, 0x5B, 0x9E, 0xD6, 0x49, 0xD2, 0x11, 0x7D, 0xFB, 0x0C, 0xE5, 0xB5, 0x35, 0x95, 0x11,
	0x9F, 0x21, 0x77, 0xBE, 0xA4, 0x62, 0xF7, 0x66, 0x60, 0xC6, 0xA0, 0x7C, 0x81, 0x0D, 0x21, 0xE1,
	0x85, 0xE2, 0xDA, 0xE5, 0x59, 0xC2, 0x7F, 0x14, 0x09, 0x3F, 0x21, 0xA9, 0x6D, 0x4E, 0x2A, 0x81,
	0x41, 0xD7, 0x6A, 0x3F, 0x96, 0x4A, 0xA7, 0x0B, 0xF7, 0xE9, 0x29, 0xE7, 0x32, 0x24, 0xBD, 0x9F,
	0x17, 0x19, 0xFD, 0xFF, 0x96, 0xBF, 0x4C, 0xA5, 0xDB, 0x51, 0x66, 0x27, 0x22, 0x57, 0x60, 0xF3,
	0xD2, 0xD8, 0x67, 0x0A, 0x4B, 0x82, 0xE1, 0x6A, 0x8B, 0x43, 0x58, 0xEC, 0xD7, 0x81, 0xB0, 0xEE,
	0xA2, 0x2A, 0x29, 0xD0, 0x76, 0x44, 0x24, 0xE9, 0x1E, 0x3D, 0xC7, 0xA6, 0xA1, 0xCE, 0xDD, 0x14,
	0x8C, 0x4B, 0xBB, 0x1B, 0x52, 0x4B, 0x9C, 0x8D, 0xD3, 0xF3, 0xD1, 0x53, 0x40, 0x77, 0x5F, 0xE9,
	0xC9, 0x8E, 0xEC, 0x22, 0x0B, 0x52, 0x4A, 0x8D, 0x95, 0x95, 0xD2, 0xF4, 0x3C, 0x67, 0x83, 0xE6,
	0x03, 0xA3, 0x5B, 0x8D, 0xF9, 0x6A, 0x16, 0x89, 0x75, 0xAC, 0xF5, 0xAC, 0x4E, 0xA4, 0x7E, 0x02,
	0xB7, 0x3A, 0x8C, 0xE6, 0xAF, 0xF8, 0xE5, 0x2D, 0xAD, 0x76, 0x89, 0x79, 0xBD, 0x73, 0x92, 0xB3,
	0x05, 0x0D, 0xD3, 0xB4, 0xE4, 0x79, 0x0E, 0x25, 0xE9, 0xA3, 0x4E, 0xE6, 0x07, 0xDB, 0x5A, 0x58,
	0x5D, 0x16, 0xCA, 0x6B, 0x16, 0xAA, 0x76, 0x37, 0x2A, 0xB4, 0x9E, 0x31, 0xDF, 0x48, 0x65, 0x07,
	0x3A, 0xF8, 0x04, 0xA5, 0xC9, 0xDA, 0xB3, 0x44, 0x20, 0xF2, 0x60, 0xE4, 0xBD, 0x84, 0x08, 0x29}

func TestDec512(t *testing.T) {
	var v testVec
	v.dir = DirectionDecrypt
	v.key = make([]byte, 32)   // all-zero
	v.tweak = make([]byte, 16) // all-zero
	v.in = make([]byte, 512)   // all-zero
	v.out = buf0809
	verifyTestVec(v, t)
}

// Test vectors from http://grouper.ieee.org/groups/1619/email/msg00218.html
// Decrypt 100 times
func TestDec512x100(t *testing.T) {
	var v testVec
	v.dir = DirectionDecrypt
	v.key = []byte{
		0x08, 0x09, 0x05, 0xDE, 0xE8, 0xEB, 0xCC, 0x89, 0xF6, 0x8B, 0xD1, 0xAF, 0x63, 0x5D, 0xB3, 0xF5,
		0xB6, 0x0C, 0x2F, 0x13, 0xF7, 0xC7, 0x68, 0xFC, 0xEB, 0x12, 0x20, 0xF6, 0xC2, 0x27, 0xFD, 0x83}
	v.tweak = []byte{
		0x5F, 0x29, 0x3E, 0x85, 0xF1, 0xEA, 0xA8, 0xEE, 0x23, 0x22, 0xF5, 0x42, 0x91, 0xBF, 0x05, 0x1E}
	v.in = buf0809
	v.out = []byte{
		0x78, 0xD8, 0xF9, 0xC2, 0xBA, 0xAE, 0xBC, 0xB9, 0x7C, 0x39, 0x14, 0xFE, 0x4F, 0xD9, 0xB9, 0xED,
		0x1B, 0x0F, 0xD0, 0x8C, 0x64, 0xCE, 0x0F, 0x7F, 0xA4, 0x40, 0xC2, 0xB2, 0x31, 0x7C, 0xAC, 0xC6,
		0x10, 0xE7, 0x5A, 0xE2, 0x26, 0xA6, 0x4C, 0x8D, 0xE4, 0x27, 0x36, 0x86, 0x7D, 0xBC, 0x5F, 0xE2,
		0xAC, 0x66, 0x3B, 0x6D, 0xB5, 0x55, 0xD7, 0x9D, 0xC4, 0x80, 0xB7, 0x07, 0xC1, 0x04, 0x11, 0xB8,
		0x31, 0xAA, 0x3E, 0xAA, 0x5A, 0x30, 0x6F, 0xDF, 0x95, 0xC4, 0xEA, 0x06, 0x84, 0xB7, 0x8B, 0xD6,
		0x24, 0x52, 0x75, 0xB5, 0xBC, 0x24, 0x57, 0x58, 0xB2, 0x38, 0x27, 0x4C, 0x2B, 0x7D, 0x7B, 0x8F,
		0xD1, 0xB9, 0x0E, 0x39, 0x0C, 0xD1, 0x0E, 0xD5, 0x4A, 0xD7, 0xD7, 0x22, 0x1A, 0x1A, 0xAE, 0x56,
		0xF8, 0x15, 0xF7, 0x02, 0x6D, 0x3E, 0xE3, 0xFB, 0x12, 0x32, 0xF8, 0x5E, 0x50, 0x0A, 0xE8, 0x75,
		0x6A, 0x53, 0xE2, 0x40, 0x38, 0xE9, 0xD2, 0x54, 0xB4, 0xF0, 0x94, 0x86, 0xF9, 0x5C, 0xAB, 0x88,
		0x25, 0x02, 0xB7, 0x7C, 0x95, 0x79, 0x55, 0x14, 0x90, 0x92, 0x60, 0x31, 0x4F, 0xEB, 0xDF, 0x2A,
		0xC0, 0xD4, 0xFD, 0x47, 0xF5, 0xD6, 0xFD, 0xA2, 0xBA, 0x66, 0xD1, 0xB1, 0x25, 0xA9, 0x00, 0xD7,
		0x8C, 0xAB, 0x58, 0xBF, 0x8E, 0xB9, 0xF2, 0x41, 0xD0, 0x80, 0x06, 0x1A, 0x2E, 0x46, 0xBE, 0x3C,
		0x21, 0xF7, 0x48, 0x45, 0x94, 0x26, 0xF7, 0x9B, 0x61, 0x9E, 0x8C, 0x81, 0x25, 0xF0, 0x6A, 0x60,
		0x7C, 0x9A, 0x55, 0xE4, 0xFD, 0x12, 0xE8, 0x17, 0xE3, 0x90, 0xFB, 0x5F, 0x8C, 0x5A, 0x05, 0x76,
		0xCF, 0xD2, 0x5F, 0x5E, 0x0A, 0xCB, 0x9D, 0xC0, 0x80, 0xB9, 0xC0, 0x1C, 0x7C, 0x9A, 0x41, 0x27,
		0x15, 0x9B, 0x8A, 0x4C, 0xD0, 0xCF, 0xFA, 0xE0, 0xF2, 0x41, 0xBF, 0xBF, 0x8E, 0x41, 0xF2, 0x4D,
		0x50, 0x68, 0xBD, 0x34, 0x54, 0xA9, 0xBE, 0x8E, 0x4F, 0x99, 0x88, 0x1A, 0x7F, 0x6F, 0xF2, 0x1E,
		0x3A, 0x7A, 0x33, 0x70, 0x0F, 0xC1, 0xF8, 0x2B, 0x64, 0x13, 0xE3, 0xF9, 0x72, 0x21, 0xA6, 0x17,
		0x16, 0x15, 0x54, 0x49, 0xCF, 0xE8, 0x7A, 0x3D, 0x57, 0x49, 0xF3, 0x91, 0x96, 0x11, 0xDE, 0xF9,
		0x5D, 0x58, 0xE4, 0x2B, 0xD6, 0xD8, 0x91, 0x43, 0xE3, 0xA0, 0xCA, 0x58, 0x8A, 0x59, 0xB7, 0x9A,
		0x55, 0x06, 0x32, 0xFE, 0xDD, 0x84, 0x62, 0x9A, 0x70, 0x75, 0xB0, 0x89, 0xF2, 0xB0, 0x80, 0x2B,
		0x69, 0xB8, 0x2E, 0xE0, 0xF6, 0x03, 0xF0, 0x3E, 0x99, 0x26, 0x3F, 0xB6, 0x95, 0x19, 0x91, 0xD8,
		0x80, 0x49, 0x63, 0xED, 0xA1, 0x23, 0x1B, 0x25, 0x0D, 0xF5, 0x5E, 0xF7, 0x9E, 0xEF, 0xDE, 0x3C,
		0x99, 0xB9, 0xCD, 0x91, 0xEA, 0xA7, 0x95, 0x63, 0xA9, 0xCD, 0x16, 0x13, 0x6D, 0xB2, 0x43, 0x6F,
		0x4D, 0x72, 0x1F, 0x91, 0x23, 0x94, 0x8A, 0xFC, 0x0B, 0x63, 0x33, 0xCF, 0x2E, 0xD4, 0xCA, 0xAB,
		0xA3, 0x40, 0x4E, 0xDD, 0x2D, 0xE8, 0xF6, 0x55, 0x66, 0x77, 0xC9, 0xB2, 0x86, 0xA2, 0x06, 0x34,
		0x39, 0x4C, 0xB7, 0xEA, 0x72, 0xDD, 0x7E, 0xE3, 0x65, 0x7D, 0x6E, 0xE1, 0xCF, 0xED, 0x8C, 0x3B,
		0x94, 0xB8, 0xBC, 0xC5, 0x78, 0x47, 0x02, 0x57, 0x7F, 0xE4, 0x00, 0xB3, 0x8A, 0x7B, 0x08, 0x95,
		0x74, 0x73, 0xCB, 0x57, 0xEF, 0xB8, 0x61, 0xF2, 0xEB, 0x9E, 0xEC, 0x5A, 0x12, 0x00, 0xCB, 0xD7,
		0x5B, 0x41, 0x43, 0x3F, 0xF1, 0x75, 0x6C, 0xE7, 0x29, 0x88, 0xCA, 0x9A, 0x69, 0x0F, 0x65, 0x97,
		0xCA, 0x0E, 0x8C, 0x98, 0xA1, 0x5C, 0x8B, 0x54, 0x71, 0xBC, 0x11, 0x67, 0x97, 0x8E, 0xC8, 0x3B,
		0xC5, 0xB5, 0x66, 0x0B, 0x4B, 0xC9, 0x93, 0x8A, 0x41, 0xDB, 0xCF, 0x8F, 0xCE, 0x32, 0x1D, 0x1F}

	bc, err := aes.NewCipher(v.key)
	if err != nil {
		t.Fatal(err)
	}
	out := v.in
	for i := 0; i < 100; i++ {
		out = Transform(bc, v.tweak, out, v.dir)
	}
	if bytes.Compare(v.out, out) != 0 {
		t.Errorf("Different content")
	}
}

func BenchmarkEnc512(b *testing.B) {
	var v testVec
	v.dir = DirectionEncrypt
	v.key = make([]byte, 32)
	v.tweak = make([]byte, 16)
	v.in = make([]byte, 512)
	b.SetBytes(int64(len(v.in)))

	bc, err := aes.NewCipher(v.key)
	if err != nil {
		b.Fatal(err)
	}

	b.ResetTimer()
	for n := 0; n < b.N; n++ {
		Transform(bc, v.tweak, v.in, v.dir)
	}
}

func BenchmarkDec512(b *testing.B) {
	var v testVec
	v.dir = DirectionDecrypt
	v.key = make([]byte, 32)
	v.tweak = make([]byte, 16)
	v.in = make([]byte, 512)
	b.SetBytes(int64(len(v.in)))

	bc, err := aes.NewCipher(v.key)
	if err != nil {
		b.Fatal(err)
	}

	b.ResetTimer()
	for n := 0; n < b.N; n++ {
		Transform(bc, v.tweak, v.in, v.dir)
	}
}