Move Infrastructure.PasswordHashing into Features.Users (#286)

web/backend/Features/Features.Users/Identity/IPasswordInfrastructure.cs

@@ -0,0 +1,17 @@
+namespace Features.Users.Identity;
+
+/// <summary>
+///     Service for hashing and verifying user passwords.
+/// </summary>
+public interface IPasswordInfrastructure
+{
+    /// <summary>
+    ///     Hashes a plaintext password, generating a new random salt.
+    /// </summary>
+    public string Hash(string password);
+
+    /// <summary>
+    ///     Verifies a plaintext password against a previously stored hash produced by <see cref="Hash" />.
+    /// </summary>
+    public bool Verify(string password, string stored);
+}