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use argon2::PasswordVerifier;
use argon2::{
password_hash::{Encoding, PasswordHashString},
Algorithm, Argon2, Params, PasswordHash, Version,
};
use serde::de::MapAccess;
use serde::{
de::{value, Error, Visitor},
Deserialize,
};
use std::{collections::HashMap, fmt, fs::read_to_string};
pub mod basic;
pub mod cookie;
struct Credentials {
wrong_user: PasswordHashString,
hashes: HashMap<String, PasswordHashString>,
}
impl Credentials {
fn get(&self, username: &str) -> &PasswordHashString {
self.hashes.get(username).unwrap_or(&self.wrong_user)
}
pub fn authentificate(&self, username: &str, password: &str) -> bool {
let algo = Argon2::new(Algorithm::Argon2id, Version::V0x13, Params::default());
let hash = self.get(username);
match hash.algorithm().as_str() {
"argon2id" => algo
.verify_password(
password.as_bytes(),
&PasswordHash::parse(hash.as_str(), hash.encoding()).unwrap(),
)
.is_ok(),
"never" => false,
_ => false,
}
}
}
impl<'de> Deserialize<'de> for Credentials {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
struct StringOrMap;
impl<'de> Visitor<'de> for StringOrMap {
type Value = HashMap<String, String>;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("credentials map or file path")
}
fn visit_str<E>(self, val: &str) -> Result<Self::Value, E>
where
E: Error,
{
let path = String::deserialize(value::StrDeserializer::new(val))?;
let c = serde_yaml::from_str(&read_to_string(path).map_err(|io| {
serde::de::Error::custom(format!("cannot read creds file: {io:?}"))
})?)
.map_err(|e| serde::de::Error::custom(format!("cannot parse creds file: {e:?}")))?;
Ok(c)
}
fn visit_map<A>(self, val: A) -> Result<Self::Value, A::Error>
where
A: MapAccess<'de>,
{
Ok(HashMap::deserialize(value::MapAccessDeserializer::new(
val,
))?)
}
}
let k = deserializer.deserialize_any(StringOrMap)?;
Ok(Credentials {
wrong_user: PasswordHashString::parse("$never", Encoding::B64).unwrap(),
hashes: k
.into_iter()
.map(|(k, v)| {
let hash = PasswordHash::parse(&v, Encoding::B64)
.map_err(|e| {
serde::de::Error::custom(format!(
"phc string for user {k:?} is invalid: {e:?}"
))
})?
.serialize();
Ok((k, hash))
})
.try_collect()?,
})
}
}
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