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
|
use crate::prelude::*;
use sha2::Digest;
extern crate argon2;
use argon2::{Config, ThreadMode, Variant, Version};
pub struct Identity {
pub email: String,
pub keys: crate::locked::Keys,
pub master_password_hash: crate::locked::PasswordHash,
}
impl Identity {
pub fn new(
email: &str,
password: &crate::locked::Password,
kdf: u32,
iterations: u32,
memory: Option<u32>,
parallelism: Option<u32>,
) -> Result<Self> {
let iterations = std::num::NonZeroU32::new(iterations)
.ok_or(Error::Pbkdf2ZeroIterations)?;
let mut keys = crate::locked::Vec::new();
keys.extend(std::iter::repeat(0).take(64));
let enc_key = &mut keys.data_mut()[0..32];
match kdf {
0 => {
pbkdf2::pbkdf2::<hmac::Hmac<sha2::Sha256>>(
password.password(),
email.as_bytes(),
iterations.get(),
enc_key,
)
.map_err(|_| Error::Pbkdf2)?;
}
1 => {
let mut hasher = sha2::Sha256::new();
hasher.update(email.as_bytes());
let salt = hasher.finalize();
let config = Config {
variant: Variant::Argon2id,
version: Version::Version13,
mem_cost: memory.unwrap() * 1024,
time_cost: iterations.get(),
lanes: parallelism.unwrap(),
thread_mode: ThreadMode::Parallel,
secret: &[],
ad: &[],
hash_length: 32
};
let hash = argon2::hash_raw(password.password(), &salt[..], &config).map_err(|_| Error::Argon2)?;
enc_key.copy_from_slice(&hash);
}
_ => {
// todo throw error or switch to enum?
}
};
let mut hash = crate::locked::Vec::new();
hash.extend(std::iter::repeat(0).take(32));
pbkdf2::pbkdf2::<hmac::Hmac<sha2::Sha256>>(
enc_key,
password.password(),
1,
hash.data_mut(),
)
.map_err(|_| Error::Pbkdf2)?;
let hkdf = hkdf::Hkdf::<sha2::Sha256>::from_prk(enc_key)
.map_err(|_| Error::HkdfExpand)?;
hkdf.expand(b"enc", enc_key)
.map_err(|_| Error::HkdfExpand)?;
let mac_key = &mut keys.data_mut()[32..64];
hkdf.expand(b"mac", mac_key)
.map_err(|_| Error::HkdfExpand)?;
let keys = crate::locked::Keys::new(keys);
let master_password_hash = crate::locked::PasswordHash::new(hash);
Ok(Self {
email: email.to_string(),
keys,
master_password_hash,
})
}
}
|
