crypto.aes module

2023-08-10 21:13:21 +03:00 · 2019-07-26 01:49:57 +10:00 · 2019-07-26 01:49:57 +10:00 · 61f3982ee8
commit 61f3982ee8
parent f7530234c7
8 changed files with 902 additions and 0 deletions
--- a/vlib/crypto/aes/aes.v
+++ b/vlib/crypto/aes/aes.v
@ -0,0 +1,69 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module aes
+
+import (
+	crypto.cipher
+	crypto.internal.subtle
+)
+
+const (
+	// The AES block size in bytes.
+	BlockSize = 16
+)
+
+// A cipher is an instance of AES encryption using a particular key.
+struct AesCipher {
+	enc []u32
+	dec []u32
+}
+
+// new_cipher creates and returns a new cipher.Block.
+// The key argument should be the AES key,
+// either 16, 24, or 32 bytes to select
+// AES-128, AES-192, or AES-256.
+pub fn new_cipher(key []byte) AesCipher {
+	k := key.len
+	switch k {
+	case 16, 24, 32:
+		// break
+	default:
+		panic('crypto.aes: invalid key size ' + k.str())
+		// return error('crypto.aes: invalid key size ' + k.str())
+	}
+	// for now use generic version
+	return new_cipher_generic(key)
+}
+
+pub fn (c &AesCipher) block_size() int { return BlockSize }
+
+pub fn (c &AesCipher) encrypt(dst, src []byte) {
+	if src.len < BlockSize {
+		panic('crypto.aes: input not full block')
+	}
+	if dst.len < BlockSize {
+		panic('crypto.aes: output not full block')
+	}
+	// if subtle.inexact_overlap(dst[:BlockSize], src[:BlockSize]) {
+	if subtle.inexact_overlap(dst.left(BlockSize), src.left(BlockSize)) {
+		panic('crypto.aes: invalid buffer overlap')
+	}
+	// for now use generic version
+	encrypt_block_generic(c.enc, dst, src)
+}
+
+pub fn (c &AesCipher) decrypt(dst, src []byte) {
+	if src.len < BlockSize {
+		panic('crypto.aes: input not full block')
+	}
+	if dst.len < BlockSize {
+		panic('crypto.aes: output not full block')
+	}
+	if subtle.inexact_overlap(dst.left(BlockSize), src.left(BlockSize)) {
+		panic('crypto.aes: invalid buffer overlap')
+	}
+	// for now use generic version
+	decrypt_block_generic(c.dec, dst, src)
+}
--- a/vlib/crypto/aes/aes_cbc.v
+++ b/vlib/crypto/aes/aes_cbc.v
@ -0,0 +1,134 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+// Cipher block chaining (CBC) mode.
+
+// CBC provides confidentiality by xoring (chaining) each plaintext block
+// with the previous ciphertext block before applying the block cipher.
+
+// See NIST SP 800-38A, pp 10-11
+
+// NOTE this will be moved to crypto.cipher interface (joe-c)
+
+module aes
+
+import (
+	crypto.cipher
+	crypto.internal.subtle
+)
+
+struct AesCbc {
+mut:
+	b          AesCipher
+	block_size int
+	iv         []byte
+	tmp        []byte
+}
+
+fn _new_cbc(b AesCipher, iv []byte) AesCbc {
+	return AesCbc{
+		b:          b,
+		block_size: b.block_size(),
+		// TODO: make b.iv copy of iv
+		iv:         iv,
+		tmp:        [byte(0); b.block_size()],
+	}
+}
+
+// new_cbc_encrypter returns a BlockMode which encrypts in cipher block chaining
+// mode, using the given Block. The length of iv must be the same as the
+// Block's block size.
+pub fn new_cbc(b AesCipher, iv []byte) AesCbc {
+	if iv.len != b.block_size() {
+		panic('crypto.cipher.new_cbc_encrypter: IV length must equal block size')
+	}
+	return _new_cbc(b, iv)
+}
+
+pub fn (x &AesCbc) block_size() int { return x.block_size }
+
+pub fn (x &AesCbc) encrypt_blocks(dst, src []byte) {
+	if src.len%x.block_size != 0 {
+		panic('crypto.cipher: input not full blocks')
+	}
+	if dst.len < src.len {
+		panic('crypto.cipher: output smaller than input')
+	}
+	if subtle.inexact_overlap(dst.left(src.len), src) {
+		panic('crypto.cipher: invalid buffer overlap')
+	}
+
+	mut iv := x.iv
+
+	for src.len > 0 {
+		// Write the xor to dst, then encrypt in place.
+		cipher.xor_bytes(dst.left(x.block_size), src.left(x.block_size), iv)
+		x.b.encrypt(dst.left(x.block_size), dst.left(x.block_size))
+
+		// Move to the next block with this block as the next iv.
+		iv = dst.left(x.block_size)
+		if x.block_size >= src.len {
+			src = []byte
+		} else {
+			src = src.right(x.block_size)
+		}
+		dst = dst.right(x.block_size)
+	}
+
+	// Save the iv for the next crypt_blocks call.
+	// TODO: make x.iv a copy of iv
+	x.iv = iv
+}
+
+pub fn (x &AesCbc) decrypt_blocks(dst, src []byte) {
+	if src.len%x.block_size != 0 {
+		panic('crypto.cipher: input not full blocks')
+	}
+	if dst.len < src.len {
+		panic('crypto.cipher: output smaller than input')
+	}
+	if subtle.inexact_overlap(dst.left(src.len), src) {
+		panic('crypto.cipher: invalid buffer overlap')
+	}
+	if src.len == 0 {
+		return
+	}
+
+	// For each block, we need to xor the decrypted data with the previous block's ciphertext (the iv).
+	// To avoid making a copy each time, we loop over the blocks BACKWARDS.
+	mut end := src.len
+	mut start := end - x.block_size
+	mut prev := start - x.block_size
+
+	// Copy the last block of ciphertext in preparation as the new iv.
+	// TODO: copy
+	x.tmp = src.slice(start, end)
+
+	// Loop over all but the first block.
+	for start > 0 {
+		x.b.decrypt(dst.slice(start, end), src.slice(start, end))
+		cipher.xor_bytes(dst.slice(start, end), dst.slice(start, end), src.slice(prev, start))
+
+		end = start
+		start = prev
+		prev -= x.block_size
+	}
+
+	// The first block is special because it uses the saved iv.
+	x.b.decrypt(dst.slice(start, end), src.slice(start, end))
+	cipher.xor_bytes(dst.slice(start, end), dst.slice(start, end), x.iv)
+
+
+	// Set the new iv to the first block we copied earlier.
+	x.iv = x.tmp
+	x.tmp = x.iv
+}
+
+fn (x &AesCbc) set_iv(iv []byte) {
+	if iv.len != x.iv.len {
+		panic('cipher: incorrect length IV')
+	}
+	// TODO: make x.iv a copy of iv
+	x.iv = iv
+}
--- a/vlib/crypto/aes/aes_test.v
+++ b/vlib/crypto/aes/aes_test.v
@ -0,0 +1,27 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+import crypto.aes
+
+fn test_crypto_aes() {
+	// TEST CBC
+	key := '6368616e676520746869732070617373'.bytes()
+	mut ciphertext := '73c86d43a9d700a253a96c85b0f6b03ac9792e0e757f869cca306bd3cba1c62b'.bytes()
+	block := aes.new_cipher(key)
+	// The IV needs to be unique, but not secure. Therefore it's common to
+	// include it at the beginning of the ciphertext.
+	if ciphertext.len < aes.BlockSize {
+		panic('ciphertext too short')
+	}
+	iv := ciphertext.left(aes.BlockSize)
+	ciphertext = ciphertext.right(aes.BlockSize)
+	// CBC mode always works in whole blocks.
+	if ciphertext.len%aes.BlockSize != 0 {
+		panic('ciphertext is not a multiple of the block size')
+	}
+	mode := aes.new_cbc(block, iv)
+	mode.encrypt_blocks(ciphertext, ciphertext)
+
+	assert ciphertext.hex() == 'C210459B514668DDC44674885E4979215265A6C44431A248421254EF357A8C2A308A8BDDF5623AF9DF91737562041CF1'
+}
--- a/vlib/crypto/aes/block_generic.v
+++ b/vlib/crypto/aes/block_generic.v
@ -0,0 +1,202 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+// This implementation is derived from the golang implementation
+// which itself is deroved in part from the reference
+// ANSI C implementation, which carries the following notice:
+//
+//	rijndael-alg-fst.c
+//
+//	@version 3.0 (December 2000)
+//
+//	Optimised ANSI C code for the Rijndael cipher (now AES)
+//
+//	@author Vincent Rijmen <vincent.rijmen@esat.kuleuven.ac.be>
+//	@author Antoon Bosselaers <antoon.bosselaers@esat.kuleuven.ac.be>
+//	@author Paulo Barreto <paulo.barreto@Terra.com.br>
+//
+//	This code is hereby placed in the public domain.
+//
+//	THIS SOFTWARE IS PROVIDED BY THE AUTHORS ''AS IS'' AND ANY EXPRESS
+//	OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+//	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+//	ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE
+//	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+//	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+//	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+//	BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+//	WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+//	OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+//	EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// See FIPS 197 for specification, and see Daemen and Rijmen's Rijndael submission
+// for implementation details.
+//	https://csrc.nist.gov/csrc/media/publications/fips/197/final/documents/fips-197.pdf
+//	https://csrc.nist.gov/archive/aes/rijndael/Rijndael-ammended.pdf
+
+module aes
+
+import (
+	encoding.binary
+)
+
+// Encrypt one block from src into dst, using the expanded key xk.
+fn encrypt_block_generic(xk []u32, dst, src []byte) {
+	mut _ := src[15] // early bounds check
+	mut s0 := binary.big_endian_u32(src.left(4))
+	mut s1 := binary.big_endian_u32(src.slice(4, 8))
+	mut s2 := binary.big_endian_u32(src.slice(8, 12))
+	mut s3 := binary.big_endian_u32(src.slice(12, 16))
+
+	// First round just XORs input with key.
+	s0 ^= xk[0]
+	s1 ^= xk[1]
+	s2 ^= xk[2]
+	s3 ^= xk[3]
+
+	// Middle rounds shuffle using tables.
+	// Number of rounds is set by length of expanded key.
+	nr := xk.len/4 - 2 // - 2: one above, one more below
+	mut k := 4
+	mut t0 := u32(0)
+	mut t1 := u32(0)
+	mut t2 := u32(0)
+	mut t3 := u32(0)
+	for r := 0; r < nr; r++ {
+		t0 = xk[u32(k+0)] ^ u32(Te0[u8(s0>>u32(24))]) ^ u32(Te1[u8(s1>>u32(16))]) ^ u32(Te2[u8(s2>>u32(8))]) ^ u32(Te3[u8(s3)])
+		t1 = xk[u32(k+1)] ^ u32(Te0[u8(s1>>u32(24))]) ^ u32(Te1[u8(s2>>u32(16))]) ^ u32(Te2[u8(s3>>u32(8))]) ^ u32(Te3[u8(s0)])
+		t2 = xk[u32(k+2)] ^ u32(Te0[u8(s2>>u32(24))]) ^ u32(Te1[u8(s3>>u32(16))]) ^ u32(Te2[u8(s0>>u32(8))]) ^ u32(Te3[u8(s1)])
+		t3 = xk[u32(k+3)] ^ u32(Te0[u8(s3>>u32(24))]) ^ u32(Te1[u8(s0>>u32(16))]) ^ u32(Te2[u8(s1>>u32(8))]) ^ u32(Te3[u8(s2)])
+		k += 4
+		s0 = t0
+		s1 = t1
+		s2 = t2
+		s3 = t3
+	}
+
+	// Last round uses s-box directly and XORs to produce output.
+	s0 = u32(u32(SBox0[t0>>u32(24)])<<u32(24)) | u32(u32(SBox0[u32(t1>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox0[u32(t2>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox0[t3&u32(0xff)])
+	s1 = u32(u32(SBox0[t1>>u32(24)])<<u32(24)) | u32(u32(SBox0[u32(t2>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox0[u32(t3>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox0[t0&u32(0xff)])
+	s2 = u32(u32(SBox0[t2>>u32(24)])<<u32(24)) | u32(u32(SBox0[u32(t3>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox0[u32(t0>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox0[t1&u32(0xff)])
+	s3 = u32(u32(SBox0[t3>>u32(24)])<<u32(24)) | u32(u32(SBox0[u32(t0>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox0[u32(t1>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox0[t2&u32(0xff)])
+
+	s0 ^= xk[k+0]
+	s1 ^= xk[k+1]
+	s2 ^= xk[k+2]
+	s3 ^= xk[k+3]
+
+	_ = dst[15] // early bounds check
+	binary.big_endian_put_u32(dst.left(4), s0)
+	binary.big_endian_put_u32(dst.slice(4, 8), s1)
+	binary.big_endian_put_u32(dst.slice(8, 12), s2)
+	binary.big_endian_put_u32(dst.slice(12, 16), s3)
+}
+
+// Decrypt one block from src into dst, using the expanded key xk.
+fn decrypt_block_generic(xk []u32, dst, src []byte) {
+	mut _ := src[15] // early bounds check
+	mut s0 := binary.big_endian_u32(src.left(4))
+	mut s1 := binary.big_endian_u32(src.slice(4, 8))
+	mut s2 := binary.big_endian_u32(src.slice(8, 12))
+	mut s3 := binary.big_endian_u32(src.slice(12, 16))
+
+	// First round just XORs input with key.
+	s0 ^= xk[0]
+	s1 ^= xk[1]
+	s2 ^= xk[2]
+	s3 ^= xk[3]
+
+	// Middle rounds shuffle using tables.
+	// Number of rounds is set by length of expanded key.
+	nr := xk.len/4 - 2 // - 2: one above, one more below
+	mut k := 4
+	mut t0 := u32(0)
+	mut t1 := u32(0)
+	mut t2 := u32(0)
+	mut t3 := u32(0)
+	for r := 0; r < nr; r++ {
+		// println('### 1')
+		t0 = xk[u32(k+0)] ^ u32(Td0[u8(s0>>u32(24))]) ^ u32(Td1[u8(s3>>u32(16))]) ^ u32(Td2[u8(s2>>u32(8))]) ^ u32(Td3[u8(s1)])
+		t1 = xk[u32(k+1)] ^ u32(Td0[u8(s1>>u32(24))]) ^ u32(Td1[u8(s0>>u32(16))]) ^ u32(Td2[u8(s3>>u32(8))]) ^ u32(Td3[u8(s2)])
+		t2 = xk[u32(k+2)] ^ u32(Td0[u8(s2>>u32(24))]) ^ u32(Td1[u8(s1>>u32(16))]) ^ u32(Td2[u8(s0>>u32(8))]) ^ u32(Td3[u8(s3)])
+		t3 = xk[u32(k+3)] ^ u32(Td0[u8(s3>>u32(24))]) ^ u32(Td1[u8(s2>>u32(16))]) ^ u32(Td2[u8(s1>>u32(8))]) ^ u32(Td3[u8(s0)])
+		// println('### 1 end')
+		k += 4
+		s0 = t0
+		s1 = t1
+		s2 = t2
+		s3 = t3
+	}
+
+	// Last round uses s-box directly and XORs to produce output.
+	s0 = u32(u32(SBox1[t0>>u32(24)])<<u32(24)) | u32(u32(SBox1[u32(t3>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox1[u32(t2>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox1[t1&u32(0xff)])
+	s1 = u32(u32(SBox1[t1>>u32(24)])<<u32(24)) | u32(u32(SBox1[u32(t0>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox1[u32(t3>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox1[t2&u32(0xff)])
+	s2 = u32(u32(SBox1[t2>>u32(24)])<<u32(24)) | u32(u32(SBox1[u32(t1>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox1[u32(t0>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox1[t3&u32(0xff)])
+	s3 = u32(u32(SBox1[t3>>u32(24)])<<u32(24)) | u32(u32(SBox1[u32(t2>>u32(16))&u32(0xff)])<<u32(16)) | u32(u32(SBox1[u32(t1>>u32(8))&u32(0xff)])<<u32(8)) | u32(SBox1[t0&u32(0xff)])
+
+	s0 ^= xk[k+0]
+	s1 ^= xk[k+1]
+	s2 ^= xk[k+2]
+	s3 ^= xk[k+3]
+
+	_ = dst[15] // early bounds check
+	binary.big_endian_put_u32(dst.left(4), s0)
+	binary.big_endian_put_u32(dst.slice(4, 8), s1)
+	binary.big_endian_put_u32(dst.slice(8, 12), s2)
+	binary.big_endian_put_u32(dst.slice(12, 16), s3)
+}
+
+// Apply SBox0 to each byte in w.
+fn subw(w u32) u32 {
+	return u32(u32(SBox0[w>>u32(24)])<<u32(24)) |
+		u32(u32(SBox0[u32(w>>u32(16))&u32(0xff)])<<u32(16)) |
+		u32(u32(SBox0[u32(w>>u32(8))&u32(0xff)])<<u32(8)) |
+		u32(SBox0[w&u32(0xff)])
+}
+
+// Rotate
+fn rotw(w u32) u32 { return u32(w<<u32(8)) | u32(w>>u32(24)) }
+
+// Key expansion algorithm. See FIPS-197, Figure 11.
+// Their rcon[i] is our powx[i-1] << 24.
+fn expand_key_generic(key []byte, enc, dec []u32) {
+	// Encryption key setup.
+	mut i := 0
+	nk := key.len / 4
+	for i = 0; i < nk; i++ {
+		if 4*i >= key.len {
+			break
+		}
+		enc[i] = binary.big_endian_u32(key.right(4*i))
+	}
+	
+	for i < enc.len {
+		mut t := enc[i-1]
+		if i%nk == 0 {
+			t = subw(rotw(t)) ^ u32(u32(PowX[i/nk-1]) << u32(24))
+		} else if nk > 6 && i%nk == 4 {
+			t = subw(t)
+		}
+		enc[i] = enc[i-nk] ^ t
+		i++
+	}
+
+	// Derive decryption key from encryption key.
+	// Reverse the 4-word round key sets from enc to produce dec.
+	// All sets but the first and last get the MixColumn transform applied.
+	if dec.len == 0 {
+		return
+	}
+	n := enc.len
+	for i = 0; i < n; i += 4 {
+		ei := n - i - 4
+		for j := 0; j < 4; j++ {
+			mut x := enc[ei+j]
+			if i > 0 && i+4 < n {
+				x = u32(Td0[SBox0[u32(x>>u32(24))]]) ^ u32(Td1[SBox0[u32(x>>u32(16))&u32(0xff)]]) ^ u32(Td2[SBox0[u32(x>>u32(8))&u32(0xff)]]) ^ u32(Td3[SBox0[x&u32(0xff)]])
+			}
+			dec[i+j] = x
+		}
+	}
+}
--- a/vlib/crypto/aes/const.v
+++ b/vlib/crypto/aes/const.v
@ -0,0 +1,380 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+// Package aes implements AES encryption (formerly Rijndael), as defined in
+// U.S. Federal Information Processing Standards Publication 197.
+//
+// The AES operations in this package are not implemented using constant-time algorithms.
+// An exception is when running on systems with enabled hardware support for AES
+// that makes these operations constant-time. Examples include amd64 systems using AES-NI
+// extensions and s390x systems using Message-Security-Assist extensions.
+// On such systems, when the result of NewCipher is passed to cipher.NewGCM,
+// the GHASH operation used by GCM is also constant-time.
+module aes
+
+// This file contains AES constants - 8720 bytes of initialized data.
+
+// https://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
+
+// AES is based on the mathematical behavior of binary polynomials
+// (polynomials over GF(2)) modulo the irreducible polynomial x⁸ + x⁴ + x³ + x + 1.
+// Addition of these binary polynomials corresponds to binary xor.
+// Reducing mod poly corresponds to binary xor with poly every
+// time a 0x100 bit appears.
+const (
+	Poly = int(1<<8) | int(1<<4) | int(1<<3) | int(1<<1) | int(1<<0) // x⁸ + x⁴ + x³ + x + 1
+)
+
+// Powers of x mod poly in GF(2).
+const (
+	// powx = [16]byte{
+	PowX = [
+		byte(0x01),
+		byte(0x02),
+		byte(0x04),
+		byte(0x08),
+		byte(0x10),
+		byte(0x20),
+		byte(0x40),
+		byte(0x80),
+		byte(0x1b),
+		byte(0x36),
+		byte(0x6c),
+		byte(0xd8),
+		byte(0xab),
+		byte(0x4d),
+		byte(0x9a),
+		byte(0x2f),
+	]
+)
+
+// FIPS-197 Figure 7. S-box substitution values in hexadecimal format.
+const (
+// SBox0 = byte{
+	SBox0 = [
+		byte(0x63), byte(0x7c), byte(0x77), byte(0x7b), byte(0xf2), byte(0x6b), byte(0x6f), byte(0xc5), byte(0x30), byte(0x01), byte(0x67), byte(0x2b), byte(0xfe), byte(0xd7), byte(0xab), byte(0x76),
+		byte(0xca), byte(0x82), byte(0xc9), byte(0x7d), byte(0xfa), byte(0x59), byte(0x47), byte(0xf0), byte(0xad), byte(0xd4), byte(0xa2), byte(0xaf), byte(0x9c), byte(0xa4), byte(0x72), byte(0xc0),
+		byte(0xb7), byte(0xfd), byte(0x93), byte(0x26), byte(0x36), byte(0x3f), byte(0xf7), byte(0xcc), byte(0x34), byte(0xa5), byte(0xe5), byte(0xf1), byte(0x71), byte(0xd8), byte(0x31), byte(0x15),
+		byte(0x04), byte(0xc7), byte(0x23), byte(0xc3), byte(0x18), byte(0x96), byte(0x05), byte(0x9a), byte(0x07), byte(0x12), byte(0x80), byte(0xe2), byte(0xeb), byte(0x27), byte(0xb2), byte(0x75),
+		byte(0x09), byte(0x83), byte(0x2c), byte(0x1a), byte(0x1b), byte(0x6e), byte(0x5a), byte(0xa0), byte(0x52), byte(0x3b), byte(0xd6), byte(0xb3), byte(0x29), byte(0xe3), byte(0x2f), byte(0x84),
+		byte(0x53), byte(0xd1), byte(0x00), byte(0xed), byte(0x20), byte(0xfc), byte(0xb1), byte(0x5b), byte(0x6a), byte(0xcb), byte(0xbe), byte(0x39), byte(0x4a), byte(0x4c), byte(0x58), byte(0xcf),
+		byte(0xd0), byte(0xef), byte(0xaa), byte(0xfb), byte(0x43), byte(0x4d), byte(0x33), byte(0x85), byte(0x45), byte(0xf9), byte(0x02), byte(0x7f), byte(0x50), byte(0x3c), byte(0x9f), byte(0xa8),
+		byte(0x51), byte(0xa3), byte(0x40), byte(0x8f), byte(0x92), byte(0x9d), byte(0x38), byte(0xf5), byte(0xbc), byte(0xb6), byte(0xda), byte(0x21), byte(0x10), byte(0xff), byte(0xf3), byte(0xd2),
+		byte(0xcd), byte(0x0c), byte(0x13), byte(0xec), byte(0x5f), byte(0x97), byte(0x44), byte(0x17), byte(0xc4), byte(0xa7), byte(0x7e), byte(0x3d), byte(0x64), byte(0x5d), byte(0x19), byte(0x73),
+		byte(0x60), byte(0x81), byte(0x4f), byte(0xdc), byte(0x22), byte(0x2a), byte(0x90), byte(0x88), byte(0x46), byte(0xee), byte(0xb8), byte(0x14), byte(0xde), byte(0x5e), byte(0x0b), byte(0xdb),
+		byte(0xe0), byte(0x32), byte(0x3a), byte(0x0a), byte(0x49), byte(0x06), byte(0x24), byte(0x5c), byte(0xc2), byte(0xd3), byte(0xac), byte(0x62), byte(0x91), byte(0x95), byte(0xe4), byte(0x79),
+		byte(0xe7), byte(0xc8), byte(0x37), byte(0x6d), byte(0x8d), byte(0xd5), byte(0x4e), byte(0xa9), byte(0x6c), byte(0x56), byte(0xf4), byte(0xea), byte(0x65), byte(0x7a), byte(0xae), byte(0x08),
+		byte(0xba), byte(0x78), byte(0x25), byte(0x2e), byte(0x1c), byte(0xa6), byte(0xb4), byte(0xc6), byte(0xe8), byte(0xdd), byte(0x74), byte(0x1f), byte(0x4b), byte(0xbd), byte(0x8b), byte(0x8a),
+		byte(0x70), byte(0x3e), byte(0xb5), byte(0x66), byte(0x48), byte(0x03), byte(0xf6), byte(0x0e), byte(0x61), byte(0x35), byte(0x57), byte(0xb9), byte(0x86), byte(0xc1), byte(0x1d), byte(0x9e),
+		byte(0xe1), byte(0xf8), byte(0x98), byte(0x11), byte(0x69), byte(0xd9), byte(0x8e), byte(0x94), byte(0x9b), byte(0x1e), byte(0x87), byte(0xe9), byte(0xce), byte(0x55), byte(0x28), byte(0xdf),
+		byte(0x8c), byte(0xa1), byte(0x89), byte(0x0d), byte(0xbf), byte(0xe6), byte(0x42), byte(0x68), byte(0x41), byte(0x99), byte(0x2d), byte(0x0f), byte(0xb0), byte(0x54), byte(0xbb), byte(0x16),
+	]
+)
+
+// FIPS-197 Figure 14.  Inverse S-box substitution values in hexadecimal format.
+const (
+// sbox1 = [256]byte{
+	SBox1 = [
+		byte(0x52), byte(0x09), byte(0x6a), byte(0xd5), byte(0x30), byte(0x36), byte(0xa5), byte(0x38), byte(0xbf), byte(0x40), byte(0xa3), byte(0x9e), byte(0x81), byte(0xf3), byte(0xd7), byte(0xfb),
+		byte(0x7c), byte(0xe3), byte(0x39), byte(0x82), byte(0x9b), byte(0x2f), byte(0xff), byte(0x87), byte(0x34), byte(0x8e), byte(0x43), byte(0x44), byte(0xc4), byte(0xde), byte(0xe9), byte(0xcb),
+		byte(0x54), byte(0x7b), byte(0x94), byte(0x32), byte(0xa6), byte(0xc2), byte(0x23), byte(0x3d), byte(0xee), byte(0x4c), byte(0x95), byte(0x0b), byte(0x42), byte(0xfa), byte(0xc3), byte(0x4e),
+		byte(0x08), byte(0x2e), byte(0xa1), byte(0x66), byte(0x28), byte(0xd9), byte(0x24), byte(0xb2), byte(0x76), byte(0x5b), byte(0xa2), byte(0x49), byte(0x6d), byte(0x8b), byte(0xd1), byte(0x25),
+		byte(0x72), byte(0xf8), byte(0xf6), byte(0x64), byte(0x86), byte(0x68), byte(0x98), byte(0x16), byte(0xd4), byte(0xa4), byte(0x5c), byte(0xcc), byte(0x5d), byte(0x65), byte(0xb6), byte(0x92),
+		byte(0x6c), byte(0x70), byte(0x48), byte(0x50), byte(0xfd), byte(0xed), byte(0xb9), byte(0xda), byte(0x5e), byte(0x15), byte(0x46), byte(0x57), byte(0xa7), byte(0x8d), byte(0x9d), byte(0x84),
+		byte(0x90), byte(0xd8), byte(0xab), byte(0x00), byte(0x8c), byte(0xbc), byte(0xd3), byte(0x0a), byte(0xf7), byte(0xe4), byte(0x58), byte(0x05), byte(0xb8), byte(0xb3), byte(0x45), byte(0x06),
+		byte(0xd0), byte(0x2c), byte(0x1e), byte(0x8f), byte(0xca), byte(0x3f), byte(0x0f), byte(0x02), byte(0xc1), byte(0xaf), byte(0xbd), byte(0x03), byte(0x01), byte(0x13), byte(0x8a), byte(0x6b),
+		byte(0x3a), byte(0x91), byte(0x11), byte(0x41), byte(0x4f), byte(0x67), byte(0xdc), byte(0xea), byte(0x97), byte(0xf2), byte(0xcf), byte(0xce), byte(0xf0), byte(0xb4), byte(0xe6), byte(0x73),
+		byte(0x96), byte(0xac), byte(0x74), byte(0x22), byte(0xe7), byte(0xad), byte(0x35), byte(0x85), byte(0xe2), byte(0xf9), byte(0x37), byte(0xe8), byte(0x1c), byte(0x75), byte(0xdf), byte(0x6e),
+		byte(0x47), byte(0xf1), byte(0x1a), byte(0x71), byte(0x1d), byte(0x29), byte(0xc5), byte(0x89), byte(0x6f), byte(0xb7), byte(0x62), byte(0x0e), byte(0xaa), byte(0x18), byte(0xbe), byte(0x1b),
+		byte(0xfc), byte(0x56), byte(0x3e), byte(0x4b), byte(0xc6), byte(0xd2), byte(0x79), byte(0x20), byte(0x9a), byte(0xdb), byte(0xc0), byte(0xfe), byte(0x78), byte(0xcd), byte(0x5a), byte(0xf4),
+		byte(0x1f), byte(0xdd), byte(0xa8), byte(0x33), byte(0x88), byte(0x07), byte(0xc7), byte(0x31), byte(0xb1), byte(0x12), byte(0x10), byte(0x59), byte(0x27), byte(0x80), byte(0xec), byte(0x5f),
+		byte(0x60), byte(0x51), byte(0x7f), byte(0xa9), byte(0x19), byte(0xb5), byte(0x4a), byte(0x0d), byte(0x2d), byte(0xe5), byte(0x7a), byte(0x9f), byte(0x93), byte(0xc9), byte(0x9c), byte(0xef),
+		byte(0xa0), byte(0xe0), byte(0x3b), byte(0x4d), byte(0xae), byte(0x2a), byte(0xf5), byte(0xb0), byte(0xc8), byte(0xeb), byte(0xbb), byte(0x3c), byte(0x83), byte(0x53), byte(0x99), byte(0x61),
+		byte(0x17), byte(0x2b), byte(0x04), byte(0x7e), byte(0xba), byte(0x77), byte(0xd6), byte(0x26), byte(0xe1), byte(0x69), byte(0x14), byte(0x63), byte(0x55), byte(0x21), byte(0x0c), byte(0x7d),
+	]
+)
+
+// Lookup tables for encryption.
+// These can be recomputed by adapting the tests in aes_test.go.
+
+// var te0 = [256]uint32{
+const (
+	Te0 = [
+		0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554,
+		0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a,
+		0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b,
+		0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b,
+		0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f,
+		0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f,
+		0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5,
+		0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f,
+		0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb,
+		0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497,
+		0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed,
+		0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a,
+		0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594,
+		0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3,
+		0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504,
+		0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d,
+		0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739,
+		0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395,
+		0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883,
+		0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76,
+		0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4,
+		0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b,
+		0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0,
+		0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818,
+		0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651,
+		0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85,
+		0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12,
+		0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9,
+		0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7,
+		0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a,
+		0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8,
+		0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a,
+	]
+	Te1 = [
+		0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5,
+		0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676,
+		0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0,
+		0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0,
+		0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc,
+		0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515,
+		0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a,
+		0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575,
+		0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0,
+		0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484,
+		0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b,
+		0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf,
+		0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585,
+		0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8,
+		0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5,
+		0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2,
+		0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717,
+		0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373,
+		0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888,
+		0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb,
+		0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c,
+		0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979,
+		0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9,
+		0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808,
+		0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6,
+		0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a,
+		0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e,
+		0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e,
+		0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494,
+		0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf,
+		0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868,
+		0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616,
+	]
+	Te2 = [
+		0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5,
+		0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76,
+		0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0,
+		0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0,
+		0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc,
+		0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15,
+		0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a,
+		0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75,
+		0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0,
+		0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384,
+		0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b,
+		0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf,
+		0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185,
+		0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8,
+		0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5,
+		0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2,
+		0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17,
+		0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673,
+		0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88,
+		0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb,
+		0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c,
+		0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279,
+		0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9,
+		0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008,
+		0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6,
+		0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a,
+		0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e,
+		0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e,
+		0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394,
+		0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df,
+		0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068,
+		0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16,
+	]
+	Te3 = [
+		0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491,
+		0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec,
+		0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb,
+		0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b,
+		0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83,
+		0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a,
+		0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f,
+		0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea,
+		0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b,
+		0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713,
+		0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6,
+		0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85,
+		0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411,
+		0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b,
+		0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1,
+		0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf,
+		0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e,
+		0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6,
+		0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b,
+		0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad,
+		0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8,
+		0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2,
+		0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049,
+		0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810,
+		0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197,
+		0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f,
+		0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c,
+		0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927,
+		0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733,
+		0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5,
+		0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0,
+		0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c,
+	]
+)
+
+// Lookup tables for decryption.
+// These can be recomputed by adapting the tests in aes_test.go.
+const (
+	Td0 = [
+		0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393,
+		0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f,
+		0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6,
+		0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844,
+		0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4,
+		0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94,
+		0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a,
+		0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c,
+		0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a,
+		0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051,
+		0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff,
+		0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb,
+		0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e,
+		0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a,
+		0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16,
+		0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8,
+		0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34,
+		0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120,
+		0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0,
+		0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef,
+		0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4,
+		0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5,
+		0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b,
+		0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6,
+		0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0,
+		0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f,
+		0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f,
+		0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713,
+		0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c,
+		0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86,
+		0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541,
+		0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742,
+	]
+	Td1 = [
+		0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303,
+		0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3,
+		0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9,
+		0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8,
+		0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a,
+		0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b,
+		0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab,
+		0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682,
+		0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe,
+		0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10,
+		0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015,
+		0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee,
+		0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72,
+		0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e,
+		0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a,
+		0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9,
+		0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e,
+		0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611,
+		0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3,
+		0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390,
+		0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf,
+		0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af,
+		0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb,
+		0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8,
+		0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266,
+		0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6,
+		0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551,
+		0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647,
+		0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1,
+		0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db,
+		0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95,
+		0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857,
+	]
+	Td2 = [
+		0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3,
+		0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562,
+		0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3,
+		0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9,
+		0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce,
+		0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908,
+		0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655,
+		0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16,
+		0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6,
+		0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e,
+		0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050,
+		0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8,
+		0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a,
+		0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436,
+		0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12,
+		0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e,
+		0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb,
+		0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6,
+		0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1,
+		0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233,
+		0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad,
+		0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3,
+		0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b,
+		0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15,
+		0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2,
+		0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791,
+		0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665,
+		0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6,
+		0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47,
+		0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844,
+		0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d,
+		0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8,
+	]
+	Td3 = [
+		0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b,
+		0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5,
+		0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b,
+		0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e,
+		0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d,
+		0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9,
+		0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66,
+		0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced,
+		0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4,
+		0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd,
+		0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60,
+		0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79,
+		0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c,
+		0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24,
+		0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c,
+		0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814,
+		0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b,
+		0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084,
+		0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077,
+		0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22,
+		0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f,
+		0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582,
+		0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb,
+		0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef,
+		0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035,
+		0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17,
+		0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46,
+		0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d,
+		0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a,
+		0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678,
+		0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff,
+		0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0,
+	]
+)
--- a/vlib/crypto/aes/cypher_generic.v
+++ b/vlib/crypto/aes/cypher_generic.v
@ -0,0 +1,22 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module aes
+
+import (
+	crypto.cipher
+	crypto.internal.subtle
+)
+
+// new_cipher_generic creates and returns a new cipher.Block
+// this is the generiv v version, no arch optimisations
+fn new_cipher_generic(key []byte) AesCipher {
+	n := key.len + 28
+	c := AesCipher{
+		enc: [u32(0); n]
+		dec: [u32(0); n]
+	}
+	expand_key_generic(key, c.enc, c.dec)
+	return c
+}
--- a/vlib/crypto/cipher/xor_generic.v
+++ b/vlib/crypto/cipher/xor_generic.v
@ -0,0 +1,36 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+module cipher
+
+// NOTE: Implement other versions (joe-c)
+
+// xor_bytes xors the bytes in a and b. The destination should have enough
+// space, otherwise xor_bytes will panic. Returns the number of bytes xor'd.
+pub fn xor_bytes(dst, a, b []byte) int {
+	mut n := a.len
+	if b.len < n {
+		n = b.len
+	}
+	if n == 0 {
+		return 0
+	}
+
+	safe_xor_bytes(dst, a, b, n)
+
+	return n
+}
+
+// n needs to be smaller or equal than the length of a and b.
+pub fn safe_xor_bytes(dst, a, b []byte, n int) {
+	for i := 0; i < n; i++ {
+		dst[i] = a[i] ^ b[i]
+	}
+}
+
+// fast_xor_words XORs multiples of 4 or 8 bytes (depending on architecture.)
+// The slice arguments a and b are assumed to be of equal length.
+pub fn xor_words(dst, a, b []byte) {
+	safe_xor_bytes(dst, a, b, b.len)
+}
--- a/vlib/crypto/internal/subtle/aliasing.v
+++ b/vlib/crypto/internal/subtle/aliasing.v
@ -0,0 +1,32 @@
+// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
+// Use of this source code is governed by an MIT license
+// that can be found in the LICENSE file.
+
+// Package subtle implements functions that are often useful in cryptographic
+// code but require careful thought to use correctly.
+
+module subtle
+
+// any_overlap reports whether x and y share memory at any (not necessarily
+// corresponding) index. The memory beyond the slice length is ignored.
+pub fn any_overlap(x, y []byte) bool {
+	// NOTE: Remember to come back to this (joe-c)
+	return x.len > 0 && y.len > 0 &&
+		// &x.data[0] <= &y.data[y.len-1] &&
+		// &y.data[0] <= &x.data[x.len-1]
+		&x[0] <= &y[y.len-1] &&
+		&y[0] <= &x[x.len-1]
+}
+
+// inexact_overlap reports whether x and y share memory at any non-corresponding
+// index. The memory beyond the slice length is ignored. Note that x and y can
+// have different lengths and still not have any inexact overlap.
+//
+// inexact_overlap can be used to implement the requirements of the crypto/cipher
+// AEAD, Block, BlockMode and Stream interfaces.
+pub fn inexact_overlap(x, y []byte) bool {
+	if x.len == 0 || y.len == 0 || &x[0] == &y[0] {
+		return false
+	}
+	return any_overlap(x, y)
+}