splinter 0.4.1

// Copyright 2018-2020 Cargill Incorporated
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::sync::Arc;

use crate::actix_web::HttpResponse;
use crate::futures::{Future, IntoFuture};
use crate::protocol;
use crate::rest_api::{
    into_bytes, secrets::SecretManager, sessions::default_validation, ErrorResponse, Method,
    ProtocolVersionRangeGuard, Resource,
};

use crate::biome::credentials::store::{CredentialsStore, CredentialsStoreError};
use crate::biome::rest_api::config::BiomeRestConfig;

use super::super::resources::authorize::AuthorizationResult;
use super::super::resources::credentials::UsernamePassword;
use super::authorize::authorize_user;

/// Defines a REST endpoint to verify a user's password
///
/// The payload should be in the JSON format:
///   {
///       "username": <existing username of the user>
///       "hashed_password": <hash of the user's existing password>
///   }
pub fn make_verify_route(
    credentials_store: Arc<dyn CredentialsStore>,
    rest_config: Arc<BiomeRestConfig>,
    secret_manager: Arc<dyn SecretManager>,
) -> Resource {
    Resource::build("/biome/verify")
        .add_request_guard(ProtocolVersionRangeGuard::new(
            protocol::BIOME_VERIFY_PROTOCOL_MIN,
            protocol::BIOME_PROTOCOL_VERSION,
        ))
        .add_method(Method::Post, move |request, payload| {
            let credentials_store = credentials_store.clone();
            let rest_config = rest_config.clone();
            let secret_manager = secret_manager.clone();
            Box::new(into_bytes(payload).and_then(move |bytes| {
                let username_password = match serde_json::from_slice::<UsernamePassword>(&bytes) {
                    Ok(val) => val,
                    Err(err) => {
                        debug!("Error parsing payload: {}", err);
                        return HttpResponse::BadRequest()
                            .json(ErrorResponse::bad_request(&format!(
                                "Failed to parse payload: {}",
                                err
                            )))
                            .into_future();
                    }
                };

                let credentials = match credentials_store
                    .fetch_credential_by_username(&username_password.username)
                {
                    Ok(credentials) => credentials,
                    Err(err) => {
                        debug!("Failed to fetch credentials: {}", err);
                        match err {
                            CredentialsStoreError::NotFoundError(_) => {
                                return HttpResponse::BadRequest()
                                    .json(ErrorResponse::bad_request(&format!(
                                        "Username not found: {}",
                                        username_password.username
                                    )))
                                    .into_future()
                            }
                            _ => {
                                error!("Failed to fetch credentials: {}", err);
                                return HttpResponse::InternalServerError()
                                    .json(ErrorResponse::internal_error())
                                    .into_future();
                            }
                        }
                    }
                };

                let validation = default_validation(&rest_config.issuer());
                match authorize_user(&request, &secret_manager, &validation) {
                    AuthorizationResult::Authorized(_) => {
                        match credentials.verify_password(&username_password.hashed_password) {
                            Ok(true) => HttpResponse::Ok()
                                .json(json!(
                                    {
                                        "message": "Successful verification",
                                        "user_id": credentials.user_id
                                }))
                                .into_future(),
                            Ok(false) => HttpResponse::BadRequest()
                                .json(ErrorResponse::bad_request("Invalid password"))
                                .into_future(),
                            Err(err) => {
                                error!("Failed to verify password: {}", err);
                                HttpResponse::InternalServerError()
                                    .json(ErrorResponse::internal_error())
                                    .into_future()
                            }
                        }
                    }
                    AuthorizationResult::Unauthorized(msg) => HttpResponse::Unauthorized()
                        .json(ErrorResponse::unauthorized(&msg))
                        .into_future(),
                    AuthorizationResult::Failed => {
                        error!("Failed to authorize user");
                        HttpResponse::InternalServerError()
                            .json(ErrorResponse::internal_error())
                            .into_future()
                    }
                }
            }))
        })
}