PM-3349 PM-3350 MAUI Migration Initial

src/Core/Services/UserPinService.cs

@@ -0,0 +1,38 @@
+using System.Threading.Tasks;
+using Bit.Core.Abstractions;
+
+namespace Bit.App.Services
+{
+    public class UserPinService : IUserPinService
+    {
+        private readonly IStateService _stateService;
+        private readonly ICryptoService _cryptoService;
+
+        public UserPinService(IStateService stateService, ICryptoService cryptoService)
+        {
+            _stateService = stateService;
+            _cryptoService = cryptoService;
+        }
+
+        public async Task SetupPinAsync(string pin, bool requireMasterPasswordOnRestart)
+        {
+            var kdfConfig = await _stateService.GetActiveUserCustomDataAsync(a => new KdfConfig(a?.Profile));
+            var email = await _stateService.GetEmailAsync();
+            var pinKey = await _cryptoService.MakePinKeyAsync(pin, email, kdfConfig);
+            var userKey = await _cryptoService.GetUserKeyAsync();
+            var protectedPinKey = await _cryptoService.EncryptAsync(userKey.Key, pinKey);
+
+            var encPin = await _cryptoService.EncryptAsync(pin);
+            await _stateService.SetProtectedPinAsync(encPin.EncryptedString);
+
+            if (requireMasterPasswordOnRestart)
+            {
+                await _stateService.SetPinKeyEncryptedUserKeyEphemeralAsync(protectedPinKey);
+            }
+            else
+            {
+                await _stateService.SetPinKeyEncryptedUserKeyAsync(protectedPinKey);
+            }
+        }
+    }
+}