Files
dbx/crates/dbx-core/src/connection_secrets.rs
T

670 lines
26 KiB
Rust

use crate::models::connection::{ConnectionConfig, TransportLayerConfig};
use std::collections::HashMap;
use std::collections::HashSet;
use std::path::{Path, PathBuf};
pub const MAIN_PASSWORD_KEY: &str = "password";
pub const SSH_PASSWORD_KEY: &str = "ssh_password";
pub const SSH_KEY_PASSPHRASE_KEY: &str = "ssh_key_passphrase";
pub const SSH_TUNNEL_SECRET_PREFIX: &str = "ssh_tunnels.";
pub const TRANSPORT_LAYER_SECRET_PREFIX: &str = "transport_layers.";
pub const PROXY_PASSWORD_KEY: &str = "proxy_password";
pub const REDIS_SENTINEL_PASSWORD_KEY: &str = "redis_sentinel_password";
pub const CONNECTION_STRING_KEY: &str = "connection_string";
pub trait ConnectionSecretStore {
fn set_secret(&self, connection_id: &str, key: &str, secret: &str) -> Result<(), String>;
fn get_secret(&self, connection_id: &str, key: &str) -> Result<Option<String>, String>;
fn delete_secret(&self, connection_id: &str, key: &str) -> Result<(), String>;
fn delete_secret_prefix(&self, _connection_id: &str, _key_prefix: &str) -> Result<(), String> {
Ok(())
}
}
pub struct FileSecretStore {
path: PathBuf,
}
impl FileSecretStore {
pub fn new(path: PathBuf) -> Self {
Self { path }
}
fn read_store(&self) -> HashMap<String, String> {
std::fs::read_to_string(&self.path).ok().and_then(|json| serde_json::from_str(&json).ok()).unwrap_or_default()
}
fn write_store(&self, map: &HashMap<String, String>) -> Result<(), String> {
let json = serde_json::to_string_pretty(map).map_err(|e| e.to_string())?;
std::fs::write(&self.path, json).map_err(|e| e.to_string())
}
}
impl ConnectionSecretStore for FileSecretStore {
fn set_secret(&self, connection_id: &str, key: &str, secret: &str) -> Result<(), String> {
let mut map = self.read_store();
map.insert(secret_account(connection_id, key), secret.to_string());
self.write_store(&map)
}
fn get_secret(&self, connection_id: &str, key: &str) -> Result<Option<String>, String> {
Ok(self.read_store().get(&secret_account(connection_id, key)).cloned())
}
fn delete_secret(&self, connection_id: &str, key: &str) -> Result<(), String> {
let mut map = self.read_store();
map.remove(&secret_account(connection_id, key));
self.write_store(&map)
}
fn delete_secret_prefix(&self, connection_id: &str, key_prefix: &str) -> Result<(), String> {
let mut map = self.read_store();
let account_prefix = secret_account(connection_id, key_prefix);
map.retain(|key, _| !key.starts_with(&account_prefix));
self.write_store(&map)
}
}
pub fn save_connections_to_file(
path: &Path,
configs: &[ConnectionConfig],
store: &dyn ConnectionSecretStore,
) -> Result<(), String> {
delete_removed_connection_secrets(path, configs, store)?;
for config in configs {
persist_secret(store, &config.id, MAIN_PASSWORD_KEY, &config.password)?;
delete_secret_prefix(store, &config.id, TRANSPORT_LAYER_SECRET_PREFIX)?;
for (index, layer) in config.transport_layers.iter().enumerate() {
persist_transport_layer_secrets(store, &config.id, index, layer)?;
}
persist_secret(store, &config.id, REDIS_SENTINEL_PASSWORD_KEY, &config.redis_sentinel_password)?;
persist_optional_secret(store, &config.id, CONNECTION_STRING_KEY, config.connection_string.as_deref())?;
// New configs persist transport-layer secrets only. Remove legacy transport secret slots after the
// migrated layer values have been written so old configs do not keep two sources of truth.
store.delete_secret(&config.id, SSH_PASSWORD_KEY)?;
store.delete_secret(&config.id, SSH_KEY_PASSPHRASE_KEY)?;
store.delete_secret(&config.id, PROXY_PASSWORD_KEY)?;
delete_secret_prefix(store, &config.id, SSH_TUNNEL_SECRET_PREFIX)?;
}
write_sanitized_connections(path, configs)
}
pub fn load_connections_from_file(
path: &Path,
store: &dyn ConnectionSecretStore,
) -> Result<Vec<ConnectionConfig>, String> {
if !path.exists() {
return Ok(vec![]);
}
let mut configs = read_connections(path)?;
let mut needs_rewrite = false;
for config in &mut configs {
if config.password.is_empty() {
if let Some(secret) = store.get_secret(&config.id, MAIN_PASSWORD_KEY)? {
config.password = secret;
}
} else {
store.set_secret(&config.id, MAIN_PASSWORD_KEY, &config.password)?;
needs_rewrite = true;
}
hydrate_transport_layer_secrets(store, config, &mut needs_rewrite)?;
if config.redis_sentinel_password.is_empty() {
if let Some(secret) = store.get_secret(&config.id, REDIS_SENTINEL_PASSWORD_KEY)? {
config.redis_sentinel_password = secret;
}
} else {
store.set_secret(&config.id, REDIS_SENTINEL_PASSWORD_KEY, &config.redis_sentinel_password)?;
needs_rewrite = true;
}
match config.connection_string.as_deref().filter(|secret| !secret.is_empty()) {
Some(secret) => {
store.set_secret(&config.id, CONNECTION_STRING_KEY, secret)?;
needs_rewrite = true;
}
None => {
if let Some(secret) = store.get_secret(&config.id, CONNECTION_STRING_KEY)? {
config.connection_string = Some(secret);
}
}
}
}
if needs_rewrite {
write_sanitized_connections(path, &configs)?;
}
Ok(configs)
}
fn persist_transport_layer_secrets(
store: &dyn ConnectionSecretStore,
connection_id: &str,
index: usize,
layer: &TransportLayerConfig,
) -> Result<(), String> {
match layer {
TransportLayerConfig::Ssh(ssh) => {
persist_secret(store, connection_id, &transport_layer_ssh_password_key(index, layer), &ssh.password)?;
persist_secret(
store,
connection_id,
&transport_layer_ssh_key_passphrase_key(index, layer),
&ssh.key_passphrase,
)?;
}
TransportLayerConfig::Proxy(proxy) => {
persist_secret(store, connection_id, &transport_layer_proxy_password_key(index, layer), &proxy.password)?;
}
}
Ok(())
}
fn hydrate_transport_layer_secrets(
store: &dyn ConnectionSecretStore,
config: &mut ConnectionConfig,
needs_rewrite: &mut bool,
) -> Result<(), String> {
for index in 0..config.transport_layers.len() {
let layer_for_key = config.transport_layers[index].clone();
match &mut config.transport_layers[index] {
TransportLayerConfig::Ssh(ssh) => {
let password_key = transport_layer_ssh_password_key(index, &layer_for_key);
if ssh.password.is_empty() {
if let Some(secret) = store.get_secret(&config.id, &password_key)?.or(legacy_ssh_password_secret(
store,
&config.id,
index,
&layer_for_key,
)?) {
ssh.password = secret;
}
} else {
store.set_secret(&config.id, &password_key, &ssh.password)?;
*needs_rewrite = true;
}
let passphrase_key = transport_layer_ssh_key_passphrase_key(index, &layer_for_key);
if ssh.key_passphrase.is_empty() {
if let Some(secret) = store
.get_secret(&config.id, &passphrase_key)?
.or(legacy_ssh_key_passphrase_secret(store, &config.id, index, &layer_for_key)?)
{
ssh.key_passphrase = secret;
}
} else {
store.set_secret(&config.id, &passphrase_key, &ssh.key_passphrase)?;
*needs_rewrite = true;
}
}
TransportLayerConfig::Proxy(proxy) => {
let password_key = transport_layer_proxy_password_key(index, &layer_for_key);
if proxy.password.is_empty() {
if let Some(secret) = store.get_secret(&config.id, &password_key)?.or(legacy_proxy_password_secret(
store,
&config.id,
&layer_for_key,
)?) {
proxy.password = secret;
}
} else {
store.set_secret(&config.id, &password_key, &proxy.password)?;
*needs_rewrite = true;
}
}
}
}
Ok(())
}
fn legacy_ssh_password_secret(
store: &dyn ConnectionSecretStore,
connection_id: &str,
index: usize,
layer: &TransportLayerConfig,
) -> Result<Option<String>, String> {
if let TransportLayerConfig::Ssh(ssh) = layer {
if ssh.id == "legacy" {
if let Some(secret) = store.get_secret(connection_id, SSH_PASSWORD_KEY)? {
return Ok(Some(secret));
}
}
store.get_secret(connection_id, &ssh_tunnel_password_key(index, ssh))
} else {
Ok(None)
}
}
fn legacy_ssh_key_passphrase_secret(
store: &dyn ConnectionSecretStore,
connection_id: &str,
index: usize,
layer: &TransportLayerConfig,
) -> Result<Option<String>, String> {
if let TransportLayerConfig::Ssh(ssh) = layer {
if ssh.id == "legacy" {
if let Some(secret) = store.get_secret(connection_id, SSH_KEY_PASSPHRASE_KEY)? {
return Ok(Some(secret));
}
}
store.get_secret(connection_id, &ssh_tunnel_key_passphrase_key(index, ssh))
} else {
Ok(None)
}
}
fn legacy_proxy_password_secret(
store: &dyn ConnectionSecretStore,
connection_id: &str,
layer: &TransportLayerConfig,
) -> Result<Option<String>, String> {
if matches!(layer, TransportLayerConfig::Proxy(proxy) if proxy.id == "legacy-proxy") {
store.get_secret(connection_id, PROXY_PASSWORD_KEY)
} else {
Ok(None)
}
}
fn delete_removed_connection_secrets(
path: &Path,
configs: &[ConnectionConfig],
store: &dyn ConnectionSecretStore,
) -> Result<(), String> {
if !path.exists() {
return Ok(());
}
let previous = match read_connections(path) {
Ok(configs) => configs,
Err(_) => return Ok(()),
};
let current_ids: HashSet<&str> = configs.iter().map(|config| config.id.as_str()).collect();
for config in previous {
if current_ids.contains(config.id.as_str()) {
continue;
}
store.delete_secret(&config.id, MAIN_PASSWORD_KEY)?;
store.delete_secret(&config.id, SSH_PASSWORD_KEY)?;
store.delete_secret(&config.id, SSH_KEY_PASSPHRASE_KEY)?;
delete_secret_prefix(store, &config.id, SSH_TUNNEL_SECRET_PREFIX)?;
delete_secret_prefix(store, &config.id, TRANSPORT_LAYER_SECRET_PREFIX)?;
store.delete_secret(&config.id, CONNECTION_STRING_KEY)?;
}
Ok(())
}
fn persist_secret(
store: &dyn ConnectionSecretStore,
connection_id: &str,
key: &str,
secret: &str,
) -> Result<(), String> {
if secret.is_empty() {
store.delete_secret(connection_id, key)
} else {
store.set_secret(connection_id, key, secret)
}
}
fn persist_optional_secret(
store: &dyn ConnectionSecretStore,
connection_id: &str,
key: &str,
secret: Option<&str>,
) -> Result<(), String> {
match secret.filter(|secret| !secret.is_empty()) {
Some(secret) => store.set_secret(connection_id, key, secret),
None => store.delete_secret(connection_id, key),
}
}
fn delete_secret_prefix(
store: &dyn ConnectionSecretStore,
connection_id: &str,
key_prefix: &str,
) -> Result<(), String> {
store.delete_secret_prefix(connection_id, key_prefix)
}
fn ssh_tunnel_secret_segment(index: usize, hop: &crate::models::connection::SshTunnelConfig) -> String {
if hop.id.trim().is_empty() {
index.to_string()
} else {
hop.id.clone()
}
}
fn ssh_tunnel_password_key(index: usize, hop: &crate::models::connection::SshTunnelConfig) -> String {
format!("{}{}.password", SSH_TUNNEL_SECRET_PREFIX, ssh_tunnel_secret_segment(index, hop))
}
fn ssh_tunnel_key_passphrase_key(index: usize, hop: &crate::models::connection::SshTunnelConfig) -> String {
format!("{}{}.key_passphrase", SSH_TUNNEL_SECRET_PREFIX, ssh_tunnel_secret_segment(index, hop))
}
fn transport_layer_secret_segment(index: usize, layer: &TransportLayerConfig) -> String {
let id = layer.id().trim();
if id.is_empty() {
index.to_string()
} else {
id.to_string()
}
}
fn transport_layer_ssh_password_key(index: usize, layer: &TransportLayerConfig) -> String {
format!("{}{}.ssh_password", TRANSPORT_LAYER_SECRET_PREFIX, transport_layer_secret_segment(index, layer))
}
fn transport_layer_ssh_key_passphrase_key(index: usize, layer: &TransportLayerConfig) -> String {
format!("{}{}.ssh_key_passphrase", TRANSPORT_LAYER_SECRET_PREFIX, transport_layer_secret_segment(index, layer))
}
fn transport_layer_proxy_password_key(index: usize, layer: &TransportLayerConfig) -> String {
format!("{}{}.proxy_password", TRANSPORT_LAYER_SECRET_PREFIX, transport_layer_secret_segment(index, layer))
}
fn read_connections(path: &Path) -> Result<Vec<ConnectionConfig>, String> {
let json = std::fs::read_to_string(path).map_err(|e| e.to_string())?;
serde_json::from_str(&json).map_err(|e| e.to_string())
}
fn write_sanitized_connections(path: &Path, configs: &[ConnectionConfig]) -> Result<(), String> {
let sanitized = sanitize_connections(configs);
let json = serde_json::to_string_pretty(&sanitized).map_err(|e| e.to_string())?;
std::fs::write(path, json).map_err(|e| e.to_string())
}
fn sanitize_connections(configs: &[ConnectionConfig]) -> Vec<ConnectionConfig> {
configs
.iter()
.cloned()
.map(|mut config| {
config.password.clear();
for layer in &mut config.transport_layers {
match layer {
TransportLayerConfig::Ssh(ssh) => {
ssh.password.clear();
ssh.key_passphrase.clear();
}
TransportLayerConfig::Proxy(proxy) => {
proxy.password.clear();
}
}
}
config.redis_sentinel_password.clear();
config.connection_string = None;
config
})
.collect()
}
pub fn secret_account(connection_id: &str, key: &str) -> String {
format!("connection:{connection_id}:{key}")
}
#[cfg(test)]
mod tests {
use super::{
load_connections_from_file, save_connections_to_file, ConnectionSecretStore, CONNECTION_STRING_KEY,
MAIN_PASSWORD_KEY, REDIS_SENTINEL_PASSWORD_KEY, SSH_PASSWORD_KEY,
};
use crate::models::connection::{ConnectionConfig, DatabaseType, SshTunnelConfig, TransportLayerConfig};
use std::cell::RefCell;
use std::collections::HashMap;
use std::path::Path;
#[derive(Default)]
struct MemorySecretStore {
values: RefCell<HashMap<String, String>>,
deleted: RefCell<Vec<String>>,
}
impl MemorySecretStore {
fn set_existing(&self, connection_id: &str, key: &str, value: &str) {
self.values.borrow_mut().insert(secret_key(connection_id, key), value.to_string());
}
fn get_existing(&self, connection_id: &str, key: &str) -> Option<String> {
self.values.borrow().get(&secret_key(connection_id, key)).cloned()
}
fn was_deleted(&self, connection_id: &str, key: &str) -> bool {
self.deleted.borrow().contains(&secret_key(connection_id, key))
}
}
impl ConnectionSecretStore for MemorySecretStore {
fn set_secret(&self, connection_id: &str, key: &str, secret: &str) -> Result<(), String> {
self.values.borrow_mut().insert(secret_key(connection_id, key), secret.to_string());
Ok(())
}
fn get_secret(&self, connection_id: &str, key: &str) -> Result<Option<String>, String> {
Ok(self.values.borrow().get(&secret_key(connection_id, key)).cloned())
}
fn delete_secret(&self, connection_id: &str, key: &str) -> Result<(), String> {
self.values.borrow_mut().remove(&secret_key(connection_id, key));
self.deleted.borrow_mut().push(secret_key(connection_id, key));
Ok(())
}
fn delete_secret_prefix(&self, connection_id: &str, key_prefix: &str) -> Result<(), String> {
let prefix = secret_key(connection_id, key_prefix);
self.values.borrow_mut().retain(|key, _| !key.starts_with(&prefix));
self.deleted.borrow_mut().push(prefix);
Ok(())
}
}
fn secret_key(connection_id: &str, key: &str) -> String {
format!("{connection_id}:{key}")
}
fn temp_connections_file(name: &str) -> std::path::PathBuf {
let dir = std::env::temp_dir().join(format!("dbx-connection-secrets-test-{}-{name}", std::process::id()));
std::fs::create_dir_all(&dir).unwrap();
dir.join("connections.json")
}
fn connection(id: &str, password: &str, _ssh_password: &str) -> ConnectionConfig {
ConnectionConfig {
id: id.to_string(),
name: format!("{id} connection"),
db_type: DatabaseType::Postgres,
driver_profile: None,
driver_label: None,
url_params: None,
host: "localhost".to_string(),
port: 5432,
username: "postgres".to_string(),
password: password.to_string(),
database: Some("postgres".to_string()),
visible_databases: None,
attached_databases: Vec::new(),
color: None,
transport_layers: Vec::new(),
connect_timeout_secs: crate::models::connection::default_connect_timeout_secs(),
query_timeout_secs: crate::models::connection::default_query_timeout_secs(),
idle_timeout_secs: crate::models::connection::default_idle_timeout_secs(),
ssl: false,
ca_cert_path: String::new(),
client_cert_path: String::new(),
client_key_path: String::new(),
sysdba: false,
oracle_connection_type: None,
connection_string: None,
redis_connection_mode: None,
redis_sentinel_master: String::new(),
redis_sentinel_nodes: String::new(),
redis_sentinel_username: String::new(),
redis_sentinel_password: String::new(),
redis_sentinel_tls: false,
redis_cluster_nodes: String::new(),
redis_key_separator: crate::models::connection::default_redis_key_separator(),
etcd_endpoints: String::new(),
external_config: None,
jdbc_driver_class: None,
jdbc_driver_paths: Vec::new(),
one_time: false,
read_only: false,
}
}
fn ssh_hop(id: &str, password: &str, passphrase: &str) -> SshTunnelConfig {
SshTunnelConfig {
id: id.to_string(),
name: String::new(),
enabled: true,
host: "bastion".to_string(),
port: 22,
user: "user".to_string(),
password: password.to_string(),
key_path: "~/.ssh/id_ed25519".to_string(),
key_passphrase: passphrase.to_string(),
connect_timeout_secs: 5,
expose_lan: false,
}
}
fn read_configs(path: &Path) -> Vec<ConnectionConfig> {
let json = std::fs::read_to_string(path).unwrap();
serde_json::from_str(&json).unwrap()
}
#[test]
fn save_connections_moves_passwords_to_secret_store_and_redacts_file() {
let path = temp_connections_file("save-redacts");
let store = MemorySecretStore::default();
let mut config = connection("main", "db-secret", "ssh-secret");
config.transport_layers = vec![TransportLayerConfig::Ssh(ssh_hop("hop-1", "hop-secret", "hop-key"))];
config.redis_sentinel_password = "sentinel-secret".to_string();
let configs = vec![config];
save_connections_to_file(&path, &configs, &store).unwrap();
assert_eq!(store.get_existing("main", MAIN_PASSWORD_KEY).as_deref(), Some("db-secret"));
assert_eq!(store.get_existing("main", "transport_layers.hop-1.ssh_password").as_deref(), Some("hop-secret"));
assert_eq!(store.get_existing("main", "transport_layers.hop-1.ssh_key_passphrase").as_deref(), Some("hop-key"));
assert_eq!(store.get_existing("main", REDIS_SENTINEL_PASSWORD_KEY).as_deref(), Some("sentinel-secret"));
let persisted = read_configs(&path);
assert_eq!(persisted[0].password, "");
match &persisted[0].transport_layers[0] {
TransportLayerConfig::Ssh(ssh) => {
assert_eq!(ssh.password, "");
assert_eq!(ssh.key_passphrase, "");
}
TransportLayerConfig::Proxy(_) => panic!("expected ssh layer"),
}
assert_eq!(persisted[0].redis_sentinel_password, "");
}
#[test]
fn load_connections_restores_passwords_from_secret_store() {
let path = temp_connections_file("load-restores");
let store = MemorySecretStore::default();
store.set_existing("main", MAIN_PASSWORD_KEY, "db-secret");
store.set_existing("main", SSH_PASSWORD_KEY, "ssh-secret");
store.set_existing("main", "ssh_tunnels.hop-1.password", "hop-secret");
store.set_existing("main", "ssh_tunnels.hop-1.key_passphrase", "hop-key");
store.set_existing("main", REDIS_SENTINEL_PASSWORD_KEY, "sentinel-secret");
let mut sanitized_config = connection("main", "", "");
sanitized_config.transport_layers = vec![TransportLayerConfig::Ssh(ssh_hop("hop-1", "", ""))];
let sanitized = vec![sanitized_config];
std::fs::write(&path, serde_json::to_string_pretty(&sanitized).unwrap()).unwrap();
let loaded = load_connections_from_file(&path, &store).unwrap();
assert_eq!(loaded[0].password, "db-secret");
match &loaded[0].transport_layers[0] {
TransportLayerConfig::Ssh(ssh) => {
assert_eq!(ssh.password, "hop-secret");
assert_eq!(ssh.key_passphrase, "hop-key");
}
TransportLayerConfig::Proxy(_) => panic!("expected ssh layer"),
}
assert_eq!(loaded[0].redis_sentinel_password, "sentinel-secret");
}
#[test]
fn load_connections_migrates_plaintext_passwords_and_rewrites_sanitized_file() {
let path = temp_connections_file("migrates-plaintext");
let store = MemorySecretStore::default();
let legacy = serde_json::json!([{
"id": "legacy",
"name": "legacy connection",
"db_type": "postgres",
"host": "localhost",
"port": 5432,
"username": "postgres",
"password": "plain-db",
"database": "postgres",
"ssh_enabled": true,
"ssh_host": "bastion",
"ssh_port": 22,
"ssh_user": "user",
"ssh_password": "plain-ssh"
}]);
std::fs::write(&path, serde_json::to_string_pretty(&legacy).unwrap()).unwrap();
let loaded = load_connections_from_file(&path, &store).unwrap();
assert_eq!(loaded[0].password, "plain-db");
match &loaded[0].transport_layers[0] {
TransportLayerConfig::Ssh(ssh) => assert_eq!(ssh.password, "plain-ssh"),
TransportLayerConfig::Proxy(_) => panic!("expected ssh layer"),
}
assert_eq!(store.get_existing("legacy", MAIN_PASSWORD_KEY).as_deref(), Some("plain-db"));
assert_eq!(store.get_existing("legacy", "transport_layers.legacy.ssh_password").as_deref(), Some("plain-ssh"));
let persisted = read_configs(&path);
assert_eq!(persisted[0].password, "");
match &persisted[0].transport_layers[0] {
TransportLayerConfig::Ssh(ssh) => assert_eq!(ssh.password, ""),
TransportLayerConfig::Proxy(_) => panic!("expected ssh layer"),
}
}
#[test]
fn save_connections_deletes_secrets_for_removed_connections() {
let path = temp_connections_file("deletes-removed");
let store = MemorySecretStore::default();
let previous = vec![connection("old", "", ""), connection("kept", "", "")];
std::fs::write(&path, serde_json::to_string_pretty(&previous).unwrap()).unwrap();
store.set_existing("old", MAIN_PASSWORD_KEY, "old-db");
store.set_existing("old", SSH_PASSWORD_KEY, "old-ssh");
store.set_existing("kept", MAIN_PASSWORD_KEY, "kept-db");
save_connections_to_file(&path, &[connection("kept", "new-db", "")], &store).unwrap();
assert!(store.was_deleted("old", MAIN_PASSWORD_KEY));
assert!(store.was_deleted("old", SSH_PASSWORD_KEY));
assert_eq!(store.get_existing("kept", MAIN_PASSWORD_KEY).as_deref(), Some("new-db"));
}
#[test]
fn save_connections_moves_connection_string_to_secret_store_and_restores_it() {
let path = temp_connections_file("connection-string");
let store = MemorySecretStore::default();
let mut config = connection("mongo", "", "");
config.db_type = DatabaseType::MongoDb;
config.connection_string = Some("mongodb://user:secret@localhost/app".to_string());
save_connections_to_file(&path, &[config], &store).unwrap();
assert_eq!(
store.get_existing("mongo", CONNECTION_STRING_KEY).as_deref(),
Some("mongodb://user:secret@localhost/app")
);
let persisted = read_configs(&path);
assert_eq!(persisted[0].connection_string, None);
let loaded = load_connections_from_file(&path, &store).unwrap();
assert_eq!(loaded[0].connection_string.as_deref(), Some("mongodb://user:secret@localhost/app"));
}
}