酒飲んでメンタル復調したので続きをする。
const S:[[u8;16];16]=[
[0x63,0x7c,0x77,0x7b,0xf2,0x6b,0x6f,0xc5,0x30,0x01,0x67,0x2b,0xfe,0xd7,0xab,0x76],
[0xca,0x82,0xc9,0x7d,0xfa,0x59,0x47,0xf0,0xad,0xd4,0xa2,0xaf,0x9c,0xa4,0x72,0xc0],
[0xb7,0xfd,0x93,0x26,0x36,0x3f,0xf7,0xcc,0x34,0xa5,0xe5,0xf1,0x71,0xd8,0x31,0x15],
[0x04,0xc7,0x23,0xc3,0x18,0x96,0x05,0x9a,0x07,0x12,0x80,0xe2,0xeb,0x27,0xb2,0x75],
[0x09,0x83,0x2c,0x1a,0x1b,0x6e,0x5a,0xa0,0x52,0x3b,0xd6,0xb3,0x29,0xe3,0x2f,0x84],
[0x53,0xd1,0x00,0xed,0x20,0xfc,0xb1,0x5b,0x6a,0xcb,0xbe,0x39,0x4a,0x4c,0x58,0xcf],
[0xd0,0xef,0xaa,0xfb,0x43,0x4d,0x33,0x85,0x45,0xf9,0x02,0x7f,0x50,0x3c,0x9f,0xa8],
[0x51,0xa3,0x40,0x8f,0x92,0x9d,0x38,0xf5,0xbc,0xb6,0xda,0x21,0x10,0xff,0xf3,0xd2],
[0xcd,0x0c,0x13,0xec,0x5f,0x97,0x44,0x17,0xc4,0xa7,0x7e,0x3d,0x64,0x5d,0x19,0x73],
[0x60,0x81,0x4f,0xdc,0x22,0x2a,0x90,0x88,0x46,0xee,0xb8,0x14,0xde,0x5e,0x0b,0xdb],
[0xe0,0x32,0x3a,0x0a,0x49,0x06,0x24,0x5c,0xc2,0xd3,0xac,0x62,0x91,0x95,0xe4,0x79],
[0xe7,0xc8,0x37,0x6d,0x8d,0xd5,0x4e,0xa9,0x6c,0x56,0xf4,0xea,0x65,0x7a,0xae,0x08],
[0xba,0x78,0x25,0x2e,0x1c,0xa6,0xb4,0xc6,0xe8,0xdd,0x74,0x1f,0x4b,0xbd,0x8b,0x8a],
[0x70,0x3e,0xb5,0x66,0x48,0x03,0xf6,0x0e,0x61,0x35,0x57,0xb9,0x86,0xc1,0x1d,0x9e],
[0xe1,0xf8,0x98,0x11,0x69,0xd9,0x8e,0x94,0x9b,0x1e,0x87,0xe9,0xce,0x55,0x28,0xdf],
[0x8c,0xa1,0x89,0x0d,0xbf,0xe6,0x42,0x68,0x41,0x99,0x2d,0x0f,0xb0,0x54,0xbb,0x16]
];
const INVS:[[u8;16];16]=[
[0x52,0x09,0x6a,0xd5,0x30,0x36,0xa5,0x38,0xbf,0x40,0xa3,0x9e,0x81,0xf3,0xd7,0xfb],
[0x7c,0xe3,0x39,0x82,0x9b,0x2f,0xff,0x87,0x34,0x8e,0x43,0x44,0xc4,0xde,0xe9,0xcb],
[0x54,0x7b,0x94,0x32,0xa6,0xc2,0x23,0x3d,0xee,0x4c,0x95,0x0b,0x42,0xfa,0xc3,0x4e],
[0x08,0x2e,0xa1,0x66,0x28,0xd9,0x24,0xb2,0x76,0x5b,0xa2,0x49,0x6d,0x8b,0xd1,0x25],
[0x72,0xf8,0xf6,0x64,0x86,0x68,0x98,0x16,0xd4,0xa4,0x5c,0xcc,0x5d,0x65,0xb6,0x92],
[0x6c,0x70,0x48,0x50,0xfd,0xed,0xb9,0xda,0x5e,0x15,0x46,0x57,0xa7,0x8d,0x9d,0x84],
[0x90,0xd8,0xab,0x00,0x8c,0xbc,0xd3,0x0a,0xf7,0xe4,0x58,0x05,0xb8,0xb3,0x45,0x06],
[0xd0,0x2c,0x1e,0x8f,0xca,0x3f,0x0f,0x02,0xc1,0xaf,0xbd,0x03,0x01,0x13,0x8a,0x6b],
[0x3a,0x91,0x11,0x41,0x4f,0x67,0xdc,0xea,0x97,0xf2,0xcf,0xce,0xf0,0xb4,0xe6,0x73],
[0x96,0xac,0x74,0x22,0xe7,0xad,0x35,0x85,0xe2,0xf9,0x37,0xe8,0x1c,0x75,0xdf,0x6e],
[0x47,0xf1,0x1a,0x71,0x1d,0x29,0xc5,0x89,0x6f,0xb7,0x62,0x0e,0xaa,0x18,0xbe,0x1b],
[0xfc,0x56,0x3e,0x4b,0xc6,0xd2,0x79,0x20,0x9a,0xdb,0xc0,0xfe,0x78,0xcd,0x5a,0xf4],
[0x1f,0xdd,0xa8,0x33,0x88,0x07,0xc7,0x31,0xb1,0x12,0x10,0x59,0x27,0x80,0xec,0x5f],
[0x60,0x51,0x7f,0xa9,0x19,0xb5,0x4a,0x0d,0x2d,0xe5,0x7a,0x9f,0x93,0xc9,0x9c,0xef],
[0xa0,0xe0,0x3b,0x4d,0xae,0x2a,0xf5,0xb0,0xc8,0xeb,0xbb,0x3c,0x83,0x53,0x99,0x61],
[0x17,0x2b,0x04,0x7e,0xba,0x77,0xd6,0x26,0xe1,0x69,0x14,0x63,0x55,0x21,0x0c,0x7d]
];
static mut W:[[u8;16];11]=[[0;16];11];
const RCON:[u8;10]=[0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80,0x1b,0x36];
fn subword(indata:&mut [u8]){
for i in 0..16{
indata[i]=S[((indata[i]>>4)&0x0F) as usize][((indata[i]>>0)&0x0F) as usize];
}
}
fn rotword(indata:&mut [u8]){
let tmp:u8=indata[0];
indata[0]=indata[1];
indata[1]=indata[2];
indata[2]=indata[3];
indata[3]=tmp;
}
fn keyexpansion_single(num:u8){
unsafe{
for i in 0..4{
W[num as usize][i]=W[(num-1) as usize][12+i];
}
rotword(&mut W[num as usize][0..4]);
subword(&mut W[num as usize][0..16]);
W[num as usize][0]^=RCON[(num-1) as usize];
for i in 0..4{
W[num as usize][i]^=W[(num-1) as usize][i];
W[num as usize][i+4]=W[num as usize][i]^W[(num-1) as usize][i+4];
W[num as usize][i+8]=W[num as usize][i+4]^W[(num-1) as usize][i+8];
W[num as usize][i+12]=W[num as usize][i+8]^W[(num-1) as usize][i+12];
}
}
}
fn keyexpansion(key:&[u8]){
for i in 0..16{
unsafe{
W[0][i]=key[i];
}
}
for i in 1..11{
keyexpansion_single(i);
}
}
fn addroundkey(src:&mut [u8],nround:u8){
for i in 0..16{
unsafe{
src[i]^=W[nround as usize][i];
}
}
}
fn subbytes(src:&mut [u8]){
for i in 0..16{
src[i]=S[((src[i]>>4)&0x0F) as usize][((src[i]>>0)&0x0F) as usize];
}
}
fn invsubbytes(src:&mut [u8]){
for i in 0..16{
src[i]=INVS[((src[i]>>4)&0x0F) as usize][((src[i]>>0)&0x0F) as usize];
}
}
fn shiftrows(src:&mut [u8]){
let mut temp:[u8;8]=[0;8];
for i in 0..4{
for j in 0..4{
temp[j]=src[j*4+i];
temp[j+4]=src[j*4+i];
}
for j in 0..4{
src[j*4+i]=temp[j+i];
}
}
}
fn invshiftrows(src:&mut [u8]){
let mut temp:[u8;8]=[0;8];
for i in 0..4{
for j in 0..4{
temp[j]=src[j*4+i];
temp[j+4]=src[j*4+i];
}
for j in 0..4{
src[j*4+i]=temp[j+4-i];
}
}
}
fn mul(a:u8,b:u8)->u8{
let mut x:u8=0;
let isrc:[u8;4]=[8,4,2,1];
for i in isrc.iter(){
if (x&0x80)>0 {
x<<=1;
x^=0x1b;
}else{
x<<=1;
}
if (b&i)>0 {
x^=a;
}
}
return x;
}
fn mixcolumn_single(r:&mut [u8]){
let mut t:[u8;4]=[0;4];
for i in 0..4{
t[i]=r[i];
}
r[0]=mul(t[0],2)^mul(t[1],3)^mul(t[2],1)^mul(t[3],1);
r[1]=mul(t[1],2)^mul(t[2],3)^mul(t[3],1)^mul(t[0],1);
r[2]=mul(t[2],2)^mul(t[3],3)^mul(t[0],1)^mul(t[1],1);
r[3]=mul(t[3],2)^mul(t[0],3)^mul(t[1],1)^mul(t[2],1);
}
fn mixcolumns(src:&mut [u8]){
for i in 0..4{
mixcolumn_single(&mut src[(i*4)..(i*4+4)]);
}
}
fn invmixcolumn_single(r:&mut [u8]){
let mut t:[u8;4]=[0;4];
for i in 0..4{
t[i]=r[i];
}
r[0]=mul(t[0],14)^mul(t[1],11)^mul(t[2],13)^mul(t[3],9);
r[1]=mul(t[1],14)^mul(t[2],11)^mul(t[3],13)^mul(t[0],9);
r[2]=mul(t[2],14)^mul(t[3],11)^mul(t[0],13)^mul(t[1],9);
r[3]=mul(t[3],14)^mul(t[0],11)^mul(t[1],13)^mul(t[2],9);
}
fn invmixcolumns(src:&mut [u8]){
for i in 0..4{
invmixcolumn_single(&mut src[(i*4)..(i*4+4)]);
}
}
fn cipher(data:&mut [u8]){
addroundkey(data,0);
for i in 1..10{
subbytes(data);
shiftrows(data);
mixcolumns(data);
addroundkey(data,i);
}
subbytes(data);
shiftrows(data);
addroundkey(data,10);
}
fn invcipher(data:&mut [u8]){
addroundkey(data,10);
for i in 1..10{
invshiftrows(data);
invsubbytes(data);
addroundkey(data,10-i);
invmixcolumns(data);
}
invshiftrows(data);
invsubbytes(data);
addroundkey(data,0);
}
#[no_mangle] pub extern "C" fn AES128Encrypt(plain:&[u8;16],key:&[u8;16],enc:&mut [u8;16]){
for i in 0..16{
enc[i]=plain[i];
}
keyexpansion(key);
cipher(enc);
}
#[no_mangle] pub extern "C" fn AES128Decrypt(enc:&[u8;16],key:&[u8;16],invenc:&mut [u8;16]){
for i in 0..16{
invenc[i]=enc[i];
}
keyexpansion(key);
invcipher(invenc);
}
#[cfg(test)]
mod tests{
use super::*;
#[test]
fn vmain() {
let key:[u8;16]=[0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f];
let plain:[u8;16]=[0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff];
let mut dataf:[u8;16]=[0;16];
let mut datab:[u8;16]=[0;16];
print!("KEY :");
for i in 0..16{
print!("{:02X}",key[i]);
}
println!("");
print!("PLAIN :");
for i in 0..16{
print!("{:02X}",plain[i]);
}
println!("");
AES128Encrypt(plain,key,dataf);
print!("CHIPHRED:");
for i in 0..16{
print!("{:02X}",dataf[i]);
}
println!("");
AES128Decrypt(dataf,key,datab);
print!("PLAIN :");
for i in 0..16{
print!("{:02X}",datab[i]);
}
println!("");
}
}
いきなり、こちらのコードとなります。
新しく追加した関数、
AES128Encrypt
AES128Decrypt
について、
#[no_mangle] pub extern "C"
を付けるのは前回やったけど、これまでのRustの知識で行くと
#[no_mangle] pub extern "C" fn AES128Encrypt(plain:&[u8],key:&[u8],enc:&mut [u8]){
...
}
#[no_mangle] pub extern "C" fn AES128Decrypt(enc:&[u8],key:&[u8],invenc:&mut [u8]){
...
}
って書いちゃうわけで、そすと、
って感じで、めっちゃ怒られて超絶凹む。
で、市の図書館に行ってRustの本を読んでみた。やっぱ本になっていると見やすいよねー。web情報ほじくり倒したけど、いまいち頭に入ってこないわけだよ初老の中年の頭には。で、関数の引数にサイズまで含んでいると配列と認識されて、サイズが含まれていないとスライスと認識されることが判明した。なので、C言語から(extern "C"なので)スライスはでけんよって警告になっているらしい。なので、
#[no_mangle] pub extern "C" fn AES128Encrypt(plain:&[u8;16],key:&[u8;16],enc:&mut [u8;16]){
...
}
#[no_mangle] pub extern "C" fn AES128Decrypt(enc:&[u8;16],key:&[u8;16],invenc:&mut [u8;16]){
...
}
ってする。で、
と、うまく逝った感じになる。
では、実行してみる。ちょっと前にC#でやったので、それを使う。が再びゼロからやってみる。
フォルダを作ってC#のプロジェクトを作ってVSCodeを起動する。
(ところでC#の開発環境ってBuildToolsとか入れなくても最初っからWindowsに入っているらしい、、、早く言ってよーー)
プロジェクトのフォルダに作成したdllをコピペして、呼び出すライブラリ名を変える。ちなみにプロトタイプ(関数名やら引数やら)は同じなので、変更不要。
が、しかし、、、ホント、やらんといかんことが多すぎてどれもやる気がしない、やりたいことが多すぎてどれにも手が付けられないんだよねー。老いて心の燃料がなくなってきた気がする。可燃性、不燃性、自燃性いずれにしても燃料がないと、、、
コメントをお書きください