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use crate::{prelude::*, api::KdfType};
use sha2::Digest;
use argon2::Argon2;
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: KdfType,
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 {
KdfType::Pbkdf2 => {
pbkdf2::pbkdf2::<hmac::Hmac<sha2::Sha256>>(
password.password(),
email.as_bytes(),
iterations.get(),
enc_key,
)
.map_err(|_| Error::Pbkdf2)?;
}
KdfType::Argon2id => {
let mut hasher = sha2::Sha256::new();
hasher.update(email.as_bytes());
let mut salt = hasher.finalize();
let mut output_key_material = [0u8];
let argon2_config = Argon2::new(
argon2::Algorithm::Argon2id,
argon2::Version::V0x13,
argon2::Params::new(memory.unwrap() * 1024,
iterations.get(),
parallelism.unwrap(),
Some(32)).unwrap());
argon2::Argon2::hash_password_into(&argon2_config, password.password(), &mut salt, &mut output_key_material)
.map_err(|_| Error::Argon2)?;
enc_key.copy_from_slice(&output_key_material);
}
};
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,
})
}
}
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