New: Require password confirmation when setting or changing password

frontend/src/FirstRun/AuthenticationRequiredModalContent.js

@@ -34,7 +34,8 @@ function AuthenticationRequiredModalContent(props) {
     authenticationMethod,
     authenticationRequired,
     username,
-    password
+    password,
+    passwordConfirmation
   } = settings;
 
   const authenticationEnabled = authenticationMethod && authenticationMethod.value !== 'none';
@@ -120,6 +121,18 @@ function AuthenticationRequiredModalContent(props) {
                   {...password}
                 />
               </FormGroup>
+
+              <FormGroup>
+                <FormLabel>{translate('PasswordConfirmation')}</FormLabel>
+
+                <FormInputGroup
+                  type={inputTypes.PASSWORD}
+                  name="passwordConfirmation"
+                  onChange={onInputChange}
+                  helpTextWarning={passwordConfirmation?.value ? undefined : translate('AuthenticationRequiredPasswordConfirmationHelpTextWarning')}
+                  {...passwordConfirmation}
+                />
+              </FormGroup>
             </div> :
             null
         }

frontend/src/Settings/General/SecuritySettings.js

@@ -124,6 +124,7 @@ class SecuritySettings extends Component {
       authenticationRequired,
       username,
       password,
+      passwordConfirmation,
       apiKey,
       certificateValidation
     } = settings;
@@ -193,6 +194,21 @@ class SecuritySettings extends Component {
             null
         }
 
+        {
+          authenticationEnabled ?
+            <FormGroup>
+              <FormLabel>{translate('PasswordConfirmation')}</FormLabel>
+
+              <FormInputGroup
+                type={inputTypes.PASSWORD}
+                name="passwordConfirmation"
+                onChange={onInputChange}
+                {...passwordConfirmation}
+              />
+            </FormGroup> :
+            null
+        }
+
         <FormGroup>
           <FormLabel>{translate('ApiKey')}</FormLabel>
 

src/NzbDrone.Core/Localization/Core/en.json

@@ -114,6 +114,7 @@
   "AuthenticationRequired": "Authentication Required",
   "AuthenticationRequiredHelpText": "Change which requests authentication is required for. Do not change unless you understand the risks.",
   "AuthenticationRequiredPasswordHelpTextWarning": "Enter a new password",
+  "AuthenticationRequiredPasswordConfirmationHelpTextWarning": "Confirm new password",
   "AuthenticationRequiredUsernameHelpTextWarning": "Enter a new username",
   "AuthenticationRequiredWarning": "To prevent remote access without authentication, {appName} now requires authentication to be enabled. You can optionally disable authentication from local addresses.",
   "AutoAdd": "Auto Add",
@@ -1137,6 +1138,7 @@
   "ParseModalUnableToParse": "Unable to parse the provided title, please try again.",
   "PartialSeason": "Partial Season",
   "Password": "Password",
+  "PasswordConfirmation": "Password Confirmation",
   "Path": "Path",
   "Paused": "Paused",
   "Peers": "Peers",

src/NzbDrone.Core/Validation/Paths/FileExistsValidator.cs

@@ -1,4 +1,4 @@
-using FluentValidation.Validators;
+using FluentValidation.Validators;
 using NzbDrone.Common.Disk;
 
 namespace NzbDrone.Core.Validation.Paths

src/Sonarr.Api.V3/Config/HostConfigController.cs

@@ -47,6 +47,9 @@ namespace Sonarr.Api.V3.Config
             SharedValidator.RuleFor(c => c.Password).NotEmpty().When(c => c.AuthenticationMethod == AuthenticationType.Basic ||
                                                                           c.AuthenticationMethod == AuthenticationType.Forms);
 
+            SharedValidator.RuleFor(c => c.PasswordConfirmation)
+                .Must((resource, p) => IsMatchingPassword(resource)).WithMessage("Must match Password");
+
             SharedValidator.RuleFor(c => c.SslPort).ValidPort().When(c => c.EnableSsl);
             SharedValidator.RuleFor(c => c.SslPort).NotEqual(c => c.Port).When(c => c.EnableSsl);
 
@@ -81,6 +84,23 @@ namespace Sonarr.Api.V3.Config
             return cert != null;
         }
 
+        private bool IsMatchingPassword(HostConfigResource resource)
+        {
+            var user = _userService.FindUser();
+
+            if (user != null && user.Password == resource.Password)
+            {
+                return true;
+            }
+
+            if (resource.Password == resource.PasswordConfirmation)
+            {
+                return true;
+            }
+
+            return false;
+        }
+
         protected override HostConfigResource GetResourceById(int id)
         {
             return GetHostConfig();
@@ -93,11 +113,10 @@ namespace Sonarr.Api.V3.Config
             resource.Id = 1;
 
             var user = _userService.FindUser();
-            if (user != null)
-            {
-                resource.Username = user.Username;
-                resource.Password = user.Password;
-            }
+
+            resource.Username = user?.Username ?? string.Empty;
+            resource.Password = user?.Password ?? string.Empty;
+            resource.PasswordConfirmation = string.Empty;
 
             return resource;
         }

src/Sonarr.Api.V3/Config/HostConfigResource.cs

@@ -19,6 +19,7 @@ namespace Sonarr.Api.V3.Config
         public bool AnalyticsEnabled { get; set; }
         public string Username { get; set; }
         public string Password { get; set; }
+        public string PasswordConfirmation { get; set; }
         public string LogLevel { get; set; }
         public string ConsoleLogLevel { get; set; }
         public string Branch { get; set; }