1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
extern crate argon2;
extern crate image;
pub fn visualize(key: &[u8]) -> Result<image::RgbImage, argon2::Error> {
let hash = hash(key)?;
let img = generate_image(6, 6, &hash);
Ok(img)
}
fn hash(key: &[u8]) -> Result<Vec<u8>, argon2::Error> {
let salt: &[u8] = &[0; 8];
let config = argon2::Config {
variant: argon2::Variant::Argon2d,
version: argon2::Version::Version13,
mem_cost: 65536,
time_cost: 12,
lanes: 4,
thread_mode: argon2::ThreadMode::Parallel,
secret: &[],
ad: &[],
hash_length: 128
};
let hash = argon2::hash_raw(key, salt, &config)?;
Ok(hash)
}
fn generate_image(height: u32, width: u32, data: &Vec<u8>) -> image::RgbImage {
assert!(data.len() as u32 >= height*width);
let mut img: image::RgbImage = image::ImageBuffer::new(width, height);
let mut data_iter = data.iter();
for (_x, _y, pixel) in img.enumerate_pixels_mut() {
let r = data_iter.next().unwrap();
let g = data_iter.next().unwrap();
let b = data_iter.next().unwrap();
*pixel = image::Rgb([*r, *g, *b]);
}
img
}