okid 0.25.0

A library for generating double clickable ids
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
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107

use {
    crate::{hex_to_byte, OkId},
    sha2::Digest,
    std::{fmt::Display, str::FromStr},
    wasm_bindgen::prelude::*,
    zerocopy::{ByteEq, ByteHash, FromBytes, Immutable, IntoBytes, Unaligned},
};

#[derive(Copy, Clone, Debug, ByteEq, Immutable, IntoBytes, ByteHash, FromBytes, Unaligned)]
#[repr(C)]
#[wasm_bindgen]
pub(super) struct Sha256(pub(crate) [u8; 32]);

impl From<sha2::Sha256> for OkId {
    fn from(value: sha2::Sha256) -> Self {
        let data = value.finalize();
        let data = data.get(0..32).unwrap();
        let mut buf = [0; 32];
        if data.len() == 32 {
            buf.copy_from_slice(data);
        }
        Self {
            hash_type: super::BinaryType::Sha256,
            digest: super::Digest::Sha256(Sha256(buf)),
        }
    }
}

impl super::IntoOkId for sha2::Sha256 {}

impl Display for Sha256 {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        let data = self.0;
        let buf = &hex::encode(data);
        f.write_str(buf)?;
        Ok(())
    }
}

impl FromStr for Sha256 {
    type Err = super::Error;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let buf = hex::decode(s)?;
        let mut hash: [u8; 32] = [0; 32];
        hash.copy_from_slice(&buf[..]);
        Ok(Sha256(hash))
    }
}

impl From<Sha256> for Vec<u64> {
    fn from(value: Sha256) -> Self {
        let data = value.0;
        let mut buf = [0; 32];
        buf.copy_from_slice(&data);
        let mut out = [0; 8];
        for i in 0..8 {
            out[i] = u64::from_le_bytes(buf[i * 8..(i + 1) * 8].try_into().unwrap());
        }
        out.to_vec()
    }
}

pub(crate) const fn parse_sha256_bytes(bytes: &[u8], start: usize) -> Option<crate::sha2::Sha256> {
    let mut result = [0u8; 32];
    let mut i = 0;
    while i < 64 {
        let high = match hex_to_byte(bytes[start + i]) {
            Some(b) => b,
            None => return None,
        };
        let low = match hex_to_byte(bytes[start + i + 1]) {
            Some(b) => b,
            None => return None,
        };
        result[i / 2] = (high << 4) | low;
        i += 2;
    }
    Some(crate::sha2::Sha256(result))
}

#[wasm_bindgen]
impl Sha256 {
    /// Create a new Sha256 instance from a byte array.
    #[wasm_bindgen(constructor)]
    #[allow(unused)]
    pub fn new(bytes: &[u8]) -> Self {
        if bytes.len() != 32 {
            panic!(
                "Sha256 must be initialized with exactly 32 bytes, got {}",
                bytes.len()
            );
        }
        let mut hash: [u8; 32] = [0; 32];
        hash.copy_from_slice(bytes);
        Sha256(hash)
    }

    #[wasm_bindgen(js_name = toOkId)]
    #[allow(unused)]
    pub fn into_okid(self) -> OkId {
        OkId {
            hash_type: super::BinaryType::Sha256,
            digest: super::Digest::Sha256(self),
        }
    }
}