ft_sdk/
rng.rs

1pub struct Rng;
2
3impl Rng {
4    pub fn generate_key(length: usize) -> String {
5        let mut rng = Rng {};
6        let ascii = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
7
8        (0..length)
9            .map(|_| {
10                let idx = rand_core::RngCore::next_u64(&mut rng) as usize % ascii.len();
11                ascii.chars().nth(idx).unwrap()
12            })
13            .collect()
14    }
15}
16
17impl rand_core::RngCore for Rng {
18    fn next_u32(&mut self) -> u32 {
19        self.next_u64() as u32
20    }
21
22    fn next_u64(&mut self) -> u64 {
23        let mut w = [0u8; 8];
24        fill_8_bytes(&mut w);
25        u64::from_be_bytes(w)
26    }
27
28    fn fill_bytes(&mut self, dest: &mut [u8]) {
29        for chunk in dest.chunks_mut(8) {
30            let mut w = [0u8; 8];
31            fill_8_bytes(&mut w);
32            chunk.copy_from_slice(&w);
33        }
34    }
35
36    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), rand_core::Error> {
37        self.fill_bytes(dest);
38        Ok(())
39    }
40}
41
42fn fill_8_bytes(w: &mut [u8; 8]) {
43    let val = ft_sdk::env::random().to_be_bytes();
44
45    for (i, byte) in val.iter().enumerate() {
46        w[i] = *byte;
47    }
48}
49
50impl rand_core::CryptoRng for Rng {}
ft_sdk/rng.rs

ft_sdk/
rng.rs
