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

use cipher::generic_array::{
    typenum::{U20, U32, U64},
    GenericArray,
};

use hmac::{Hmac, Mac};
#[cfg(feature = "challenge_response")]
use sha1::Sha1;
use sha2::{Digest, Sha256, Sha512};

use crate::error::CryptographyError;

pub(crate) mod ciphers;
pub(crate) mod kdf;

pub(crate) fn calculate_hmac(
    elements: &[&[u8]],
    key: &[u8],
) -> Result<GenericArray<u8, U32>, CryptographyError> {
    type HmacSha256 = Hmac<Sha256>;
    let mut mac = HmacSha256::new_from_slice(key)?;

    for element in elements {
        mac.update(element);
    }

    let result = mac.finalize();
    Ok(result.into_bytes())
}

#[cfg(feature = "challenge_response")]
pub(crate) fn calculate_hmac_sha1(
    elements: &[&[u8]],
    key: &[u8],
) -> Result<GenericArray<u8, U20>, CryptographyError> {
    type HmacSha1 = Hmac<Sha1>;
    let mut mac = HmacSha1::new_from_slice(key)?;

    for element in elements {
        mac.update(element);
    }

    let result = mac.finalize();
    Ok(result.into_bytes())
}

pub(crate) fn calculate_sha256(
    elements: &[&[u8]],
) -> Result<GenericArray<u8, U32>, CryptographyError> {
    let mut digest = Sha256::new();

    for element in elements {
        digest.update(element);
    }

    Ok(digest.finalize())
}

pub(crate) fn calculate_sha512(
    elements: &[&[u8]],
) -> Result<GenericArray<u8, U64>, CryptographyError> {
    let mut digest = Sha512::new();

    for element in elements {
        digest.update(element);
    }

    Ok(digest.finalize())
}