test: speed up admin auth hashing in tests

apps/admin-api/src/auth.rs

@@ -2,6 +2,8 @@ use argon2::{
     Argon2,
     password_hash::{PasswordHash, PasswordHasher, PasswordVerifier, SaltString, rand_core::OsRng},
 };
+#[cfg(test)]
+use argon2::{Algorithm, Params, Version};
 use axum::{
     extract::{OriginalUri, Request, State},
     middleware::Next,
@@ -54,7 +56,7 @@ pub struct SessionCookie {
 pub fn hash_password(password: &str, pepper: &str) -> Result<String, ApiError> {
     let salt = SaltString::generate(&mut OsRng);
     let password = format!("{password}{pepper}");
-    Argon2::default()
+    password_hasher()?
         .hash_password(password.as_bytes(), &salt)
         .map(|hash| hash.to_string())
         .map_err(|error| ApiError::internal(format!("failed to hash password: {error}")))
@@ -65,9 +67,25 @@ pub fn verify_password(password: &str, pepper: &str, password_hash: &str) -> boo
         return false;
     };
     let password = format!("{password}{pepper}");
-    Argon2::default()
-        .verify_password(password.as_bytes(), &parsed)
-        .is_ok()
+    match password_hasher() {
+        Ok(argon2) => argon2.verify_password(password.as_bytes(), &parsed).is_ok(),
+        Err(_) => false,
+    }
+}
+
+fn password_hasher() -> Result<Argon2<'static>, ApiError> {
+    #[cfg(test)]
+    {
+        let params = Params::new(8 * 1024, 1, 1, None).map_err(|error| {
+            ApiError::internal(format!("failed to initialize test argon2 params: {error}"))
+        })?;
+        Ok(Argon2::new(Algorithm::Argon2id, Version::V0x13, params))
+    }
+
+    #[cfg(not(test))]
+    {
+        Ok(Argon2::default())
+    }
 }
 
 pub fn create_session_cookie(settings: &AuthSettings) -> Result<SessionCookie, ApiError> {