feat(api): wrap database password with Secret

Cargo.lock

@@ -615,6 +615,7 @@ dependencies = [
  "config",
  "once_cell",
  "reqwest",
+ "secrecy",
  "serde",
  "sqlx",
  "tokio",
@@ -1930,6 +1931,16 @@ dependencies = [
  "untrusted",
 ]
 
+[[package]]
+name = "secrecy"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9bd1c54ea06cfd2f6b63219704de0b9b4f72dcc2b8fdef820be6cd799780e91e"
+dependencies = [
+ "serde",
+ "zeroize",
+]
+
 [[package]]
 name = "security-framework"
 version = "2.9.2"

Cargo.toml

@@ -27,6 +27,7 @@ tracing-subscriber = { version = "0.3.18", features = ["registry", "env-filter"]
 tracing-bunyan-formatter = "0.3.9"
 tracing-log = "0.2.0"
 once_cell = "1.19.0"
+secrecy = { version = "0.8.0", features = ["serde"] }
 
 [dependencies.sqlx]
 version = "0.7"

src/configuration.rs

@@ -1,3 +1,5 @@
+use secrecy::{ExposeSecret, Secret};
+
 #[derive(serde::Deserialize)]
 pub struct Settings {
     pub database: DatabaseSettings,
@@ -7,7 +9,7 @@ pub struct Settings {
 #[derive(serde::Deserialize)]
 pub struct DatabaseSettings {
     pub username: String,
-    pub password: String,
+    pub password: Secret<String>,
     pub port: u16,
     pub host: String,
     pub database_name: String,
@@ -25,17 +27,24 @@ pub fn get_configuration() -> Result<Settings, config::ConfigError> {
 }
 
 impl DatabaseSettings {
-    pub fn connection_string(&self) -> String {
-        format!(
+    pub fn connection_string(&self) -> Secret<String> {
+        Secret::new(format!(
             "postgres://{}:{}@{}:{}/{}",
-            self.username, self.password, self.host, self.port, self.database_name
-        )
+            self.username,
+            self.password.expose_secret(),
+            self.host,
+            self.port,
+            self.database_name
+        ))
     }
 
-    pub fn connection_string_without_db(&self) -> String {
-        format!(
+    pub fn connection_string_without_db(&self) -> Secret<String> {
+        Secret::new(format!(
             "postgres://{}:{}@{}:{}",
-            self.username, self.password, self.host, self.port
-        )
+            self.username,
+            self.password.expose_secret(),
+            self.host,
+            self.port
+        ))
     }
 }

src/main.rs

@@ -2,6 +2,7 @@ use std::net::TcpListener;
 
 use email_newsletter_api::telemetry::{get_subscriber, init_subscriber};
 use email_newsletter_api::{configuration::get_configuration, startup};
+use secrecy::ExposeSecret;
 use sqlx::PgPool;
 
 #[tokio::main]
@@ -15,7 +16,7 @@ async fn main() -> Result<(), std::io::Error> {
     );
     init_subscriber(subscriber);
 
-    let db_conn = PgPool::connect(&configuration.database.connection_string())
+    let db_conn = PgPool::connect(configuration.database.connection_string().expose_secret())
         .await
         .expect("Failed to connect to PostgreSQL");
 

tests/test_utils.rs

@@ -3,6 +3,7 @@ use email_newsletter_api::{
     telemetry::{get_subscriber, init_subscriber},
 };
 use once_cell::sync::Lazy;
+use secrecy::ExposeSecret;
 use sqlx::{Connection, Executor, PgConnection, PgPool};
 use std::net::TcpListener;
 use uuid::Uuid;
@@ -57,7 +58,8 @@ pub async fn spawn_app() -> TestApp {
 }
 
 pub async fn configure_test_database(db_config: &DatabaseSettings) -> PgPool {
-    let mut connection = PgConnection::connect(&db_config.connection_string_without_db())
+    let mut connection =
+        PgConnection::connect(db_config.connection_string_without_db().expose_secret())
             .await
             .expect("Failed to connect to Postgres");
 
@@ -66,7 +68,7 @@ pub async fn configure_test_database(db_config: &DatabaseSettings) -> PgPool {
         .await
         .expect("Failed to create database");
 
-    let conn_pool = PgPool::connect(&db_config.connection_string())
+    let conn_pool = PgPool::connect(db_config.connection_string().expose_secret())
         .await
         .expect("Failed to connect to PostgreSQL pool");