bitwarden-crypto 3.0.0

use std::{collections::HashMap, hash::Hash, sync::Arc};

use rayon::prelude::*;
use uuid::Uuid;

use crate::{ContentFormat, CryptoError, SymmetricCryptoKey, error::Result};

#[allow(missing_docs)]
pub trait KeyContainer: Send + Sync {
    fn get_key(&self, org_id: &Option<Uuid>) -> Result<&SymmetricCryptoKey, CryptoError>;
}

impl<T: KeyContainer> KeyContainer for Arc<T> {
    fn get_key(&self, org_id: &Option<Uuid>) -> Result<&SymmetricCryptoKey, CryptoError> {
        self.as_ref().get_key(org_id)
    }
}

#[allow(missing_docs)]
pub trait CryptoKey {}

/// An encryption operation that takes the input value and encrypts it into the output value
/// using a key reference. Implementing this requires a content type to be specified in
/// the implementation.
pub trait KeyEncryptable<Key: CryptoKey, Output> {
    /// Encrypts a value using the provided key reference.
    fn encrypt_with_key(self, key: &Key) -> Result<Output>;
}

/// An encryption operation that takes the input value and encrypts it into the output value
/// using a key reference, with an externally provided content type.
///
/// In contrast to `KeyEncryptable`, this trait allows the caller to specify the content format.
/// Because of this, it is not exposed outside of the crate, because outside callers should
/// not make a choice about the content format. Where possible, the content format is
/// ensured at compile time by the type system, not at runtime by the caller passing
/// in a parameter.
pub(crate) trait KeyEncryptableWithContentType<Key: CryptoKey, Output> {
    fn encrypt_with_key(self, key: &Key, content_format: ContentFormat) -> Result<Output>;
}

#[allow(missing_docs)]
pub trait KeyDecryptable<Key: CryptoKey, Output> {
    fn decrypt_with_key(&self, key: &Key) -> Result<Output>;
}

impl<T: KeyEncryptable<Key, Output>, Key: CryptoKey, Output> KeyEncryptable<Key, Option<Output>>
    for Option<T>
{
    fn encrypt_with_key(self, key: &Key) -> Result<Option<Output>> {
        self.map(|e| e.encrypt_with_key(key)).transpose()
    }
}

impl<T: KeyDecryptable<Key, Output>, Key: CryptoKey, Output> KeyDecryptable<Key, Option<Output>>
    for Option<T>
{
    fn decrypt_with_key(&self, key: &Key) -> Result<Option<Output>> {
        self.as_ref().map(|e| e.decrypt_with_key(key)).transpose()
    }
}

impl<T: KeyEncryptable<Key, Output>, Key: CryptoKey, Output> KeyEncryptable<Key, Output>
    for Box<T>
{
    fn encrypt_with_key(self, key: &Key) -> Result<Output> {
        (*self).encrypt_with_key(key)
    }
}

impl<T: KeyDecryptable<Key, Output>, Key: CryptoKey, Output> KeyDecryptable<Key, Output>
    for Box<T>
{
    fn decrypt_with_key(&self, key: &Key) -> Result<Output> {
        (**self).decrypt_with_key(key)
    }
}

impl<
    T: KeyEncryptable<Key, Output> + Send + Sync,
    Key: CryptoKey + Send + Sync,
    Output: Send + Sync,
> KeyEncryptable<Key, Vec<Output>> for Vec<T>
{
    fn encrypt_with_key(self, key: &Key) -> Result<Vec<Output>> {
        self.into_par_iter()
            .map(|e| e.encrypt_with_key(key))
            .collect()
    }
}

impl<
    T: KeyDecryptable<Key, Output> + Send + Sync,
    Key: CryptoKey + Send + Sync,
    Output: Send + Sync,
> KeyDecryptable<Key, Vec<Output>> for Vec<T>
{
    fn decrypt_with_key(&self, key: &Key) -> Result<Vec<Output>> {
        self.into_par_iter()
            .map(|e| e.decrypt_with_key(key))
            .collect()
    }
}

impl<
    T: KeyEncryptable<Key, Output> + Send + Sync,
    Key: CryptoKey + Send + Sync,
    Output: Send + Sync,
    Id: Hash + Eq + Send + Sync,
> KeyEncryptable<Key, HashMap<Id, Output>> for HashMap<Id, T>
{
    fn encrypt_with_key(self, key: &Key) -> Result<HashMap<Id, Output>> {
        self.into_par_iter()
            .map(|(id, e)| Ok((id, e.encrypt_with_key(key)?)))
            .collect()
    }
}

impl<
    T: KeyDecryptable<Key, Output> + Send + Sync,
    Key: CryptoKey + Send + Sync,
    Output: Send + Sync,
    Id: Hash + Eq + Copy + Send + Sync,
> KeyDecryptable<Key, HashMap<Id, Output>> for HashMap<Id, T>
{
    fn decrypt_with_key(&self, key: &Key) -> Result<HashMap<Id, Output>> {
        self.into_par_iter()
            .map(|(id, e)| Ok((*id, e.decrypt_with_key(key)?)))
            .collect()
    }
}