[PM-1270] Throw error when removing master password reset policy with TDE enabled (#2964)

* [PM-1270] Updated PolicyService to throw an exception in case TDE is enabled and the user is trying to turn off the master password reset policy or tries to remove auto-enrollment

* [PM-1270] Added unit tests around the checks for turning off the master password reset policy or removing auto-enrollment

* [PM-1270] Fixed existing unit test SaveAsync_NewPolicy_Created

* [PM-1270] Removed unused method mock on unit test

src/Core/Services/Implementations/PolicyService.cs

@@ -75,6 +75,13 @@ public class PolicyService : IPolicyService
                 }
                 break;
 
+            case PolicyType.ResetPassword:
+                if (!policy.Enabled || policy.GetDataModel<ResetPasswordDataModel>()?.AutoEnrollEnabled == false)
+                {
+                    await RequiredBySsoTrustedDeviceEncryptionAsync(org);
+                }
+                break;
+
             case PolicyType.MaximumVaultTimeout:
                 if (policy.Enabled)
                 {
@@ -230,7 +237,6 @@ public class PolicyService : IPolicyService
 
     private async Task RequiredByKeyConnectorAsync(Organization org)
     {
-
         var ssoConfig = await _ssoConfigRepository.GetByOrganizationIdAsync(org.Id);
         if (ssoConfig?.GetData()?.MemberDecryptionType == MemberDecryptionType.KeyConnector)
         {
@@ -254,4 +260,13 @@ public class PolicyService : IPolicyService
             throw new BadRequestException("This policy is only available to 2020 Enterprise plans.");
         }
     }
+
+    private async Task RequiredBySsoTrustedDeviceEncryptionAsync(Organization org)
+    {
+        var ssoConfig = await _ssoConfigRepository.GetByOrganizationIdAsync(org.Id);
+        if (ssoConfig?.GetData()?.MemberDecryptionType == MemberDecryptionType.TrustedDeviceEncryption)
+        {
+            throw new BadRequestException("Trusted device encryption is on and requires this policy.");
+        }
+    }
 }

test/Core.Test/Services/PolicyServiceTests.cs

@@ -6,6 +6,7 @@ using Bit.Core.Entities;
 using Bit.Core.Enums;
 using Bit.Core.Exceptions;
 using Bit.Core.Models.Data.Organizations.OrganizationUsers;
+using Bit.Core.Models.Data.Organizations.Policies;
 using Bit.Core.Repositories;
 using Bit.Core.Services;
 using Bit.Test.Common.AutoFixture;
@@ -208,6 +209,7 @@ public class PolicyServiceTests
         [PolicyFixtures.Policy(PolicyType.ResetPassword)] Policy policy, SutProvider<PolicyService> sutProvider)
     {
         policy.Id = default;
+        policy.Data = null;
 
         SetupOrg(sutProvider, policy.OrganizationId, new Organization
         {
@@ -396,6 +398,52 @@ public class PolicyServiceTests
         Assert.True(policy.RevisionDate - utcNow < TimeSpan.FromSeconds(1));
     }
 
+    [Theory]
+    [BitAutoData(true, false)]
+    [BitAutoData(false, true)]
+    [BitAutoData(false, false)]
+    public async Task SaveAsync_PolicyRequiredByTrustedDeviceEncryption_DisablePolicyOrDisableAutomaticEnrollment_ThrowsBadRequest(
+        bool policyEnabled,
+        bool autoEnrollEnabled,
+        [PolicyFixtures.Policy(PolicyType.ResetPassword)] Policy policy,
+        SutProvider<PolicyService> sutProvider)
+    {
+        policy.Enabled = policyEnabled;
+        policy.SetDataModel(new ResetPasswordDataModel
+        {
+            AutoEnrollEnabled = autoEnrollEnabled
+        });
+
+        SetupOrg(sutProvider, policy.OrganizationId, new Organization
+        {
+            Id = policy.OrganizationId,
+            UsePolicies = true,
+        });
+
+        var ssoConfig = new SsoConfig { Enabled = true };
+        ssoConfig.SetData(new SsoConfigurationData { MemberDecryptionType = MemberDecryptionType.TrustedDeviceEncryption });
+
+        sutProvider.GetDependency<ISsoConfigRepository>()
+            .GetByOrganizationIdAsync(policy.OrganizationId)
+            .Returns(ssoConfig);
+
+        var badRequestException = await Assert.ThrowsAsync<BadRequestException>(
+            () => sutProvider.Sut.SaveAsync(policy,
+                Substitute.For<IUserService>(),
+                Substitute.For<IOrganizationService>(),
+                Guid.NewGuid()));
+
+        Assert.Contains("Trusted device encryption is on and requires this policy.", badRequestException.Message, StringComparison.OrdinalIgnoreCase);
+
+        await sutProvider.GetDependency<IPolicyRepository>()
+            .DidNotReceiveWithAnyArgs()
+            .UpsertAsync(default);
+
+        await sutProvider.GetDependency<IEventService>()
+            .DidNotReceiveWithAnyArgs()
+            .LogPolicyEventAsync(default, default, default);
+    }
+
     [Theory, BitAutoData]
     public async Task GetPoliciesApplicableToUserAsync_WithRequireSsoTypeFilter_WithDefaultOrganizationUserStatusFilter_ReturnsNoPolicies(Guid userId, SutProvider<PolicyService> sutProvider)
     {