Continue adding TLS support

.editorconfig

@@ -35,6 +35,7 @@ dotnet_style_qualification_for_method = false:suggestion
 dotnet_style_qualification_for_event = false:suggestion
 
 # Types: use keywords instead of BCL types, and permit var only when the type is clear
+# TODO consider making csharp_style_var_for_built_in_types and csharp_style_var_elsewhere ERRORS
 csharp_style_var_for_built_in_types = false:suggestion
 csharp_style_var_when_type_is_apparent = false:none
 csharp_style_var_elsewhere = false:suggestion

Directory.Packages.props

@@ -5,14 +5,15 @@
   <ItemGroup>
     <!-- RabbitMQ.Amqp.Client -->
     <PackageVersion Include="AMQPNetLite.Core" Version="2.4.11" />
+    <PackageVersion Include="EasyNetQ.Management.Client" Version="3.0.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.PublicApiAnalyzers" Version="3.3.4" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="1.1.1" />
-    <PackageVersion Include="MinVer" Version="4.3.0" />
+    <PackageVersion Include="MinVer" Version="5.0.0" />
     <!-- Tests -->
-    <PackageVersion Include="AltCover" Version="8.8.74" />
-    <PackageVersion Include="xunit" Version="2.8.1" />
-    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.1" />
+    <PackageVersion Include="AltCover" Version="8.8.165" />
+    <PackageVersion Include="xunit" Version="2.9.0" />
+    <PackageVersion Include="xunit.runner.visualstudio" Version="2.8.2" />
     <PackageVersion Include="Xunit.SkippableFact" Version="1.4.13" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
     <!-- docs/**/*.csproj -->

RabbitMQ.AMQP.Client/IConnectionSettings.cs

@@ -9,12 +9,13 @@ public interface IConnectionSettings : IEquatable<IConnectionSettings>
     string Host { get; }
     int Port { get; }
     string VirtualHost { get; }
-    string User { get; }
-    string Password { get; }
+    string? User { get; }
+    string? Password { get; }
     string Scheme { get; }
     string ConnectionName { get; }
     string Path { get; }
     bool UseSsl { get; }
+    SaslMechanism SaslMechanism { get; }
     ITlsSettings? TlsSettings { get; }
 }
 

RabbitMQ.AMQP.Client/ILifeCycle.cs

@@ -26,7 +26,7 @@ public interface ILifeCycle
 {
     Task CloseAsync();
 
-    public State State { get; }
+    State State { get; }
 
-    public event LifeCycleCallBack ChangeState;
+    event LifeCycleCallBack ChangeState;
 }

RabbitMQ.AMQP.Client/IRecoveryConfiguration.cs

@@ -60,6 +60,6 @@ public interface IBackOffDelayPolicy
     /// or when the user wants to disable the backoff delay policy.
     /// </summary>
     bool IsActive();
-    
+
     int CurrentAttempt { get; }
 }

RabbitMQ.AMQP.Client/Impl/AmqpConnection.cs

@@ -2,6 +2,7 @@
 using System.Collections.ObjectModel;
 using Amqp;
 using Amqp.Framing;
+using Amqp.Sasl;
 using Amqp.Types;
 
 namespace RabbitMQ.AMQP.Client.Impl;
@@ -232,6 +233,11 @@ void onOpened(Amqp.IConnection connection, Open open1)
                 }
             }
 
+            if (_connectionSettings.SaslMechanism == SaslMechanism.External)
+            {
+                cf.SASL.Profile = SaslProfile.External;
+            }
+
             try
             {
                 _nativeConnection = await cf.CreateAsync(_connectionSettings.Address, open: open, onOpened: onOpened)

RabbitMQ.AMQP.Client/Impl/AmqpManagement.cs

@@ -388,8 +388,8 @@ public override string ToString()
 
         return info;
     }
-    
-    
+
+
     internal void ChangeStatus(State newState, Error? error)
     {
         OnNewStatus(newState, error);

RabbitMQ.AMQP.Client/Impl/ConnectionSettings.cs

@@ -10,14 +10,14 @@ public class ConnectionSettingBuilder
     // TODO: maybe add the event "LifeCycle" to the builder
     private string _host = "localhost";
     private int _port = -1; // Note: -1 means use the defalt for the scheme
-    private string _user = "guest";
-    private string _password = "guest";
+    private string? _user = "guest";
+    private string? _password = "guest";
     private string _scheme = "AMQP";
-    private string _connection = "AMQP.NET";
+    private string _connectionName = "AMQP.NET";
     private string _virtualHost = "/";
+    private SaslMechanism _saslMechanism = Client.SaslMechanism.Plain;
     private IRecoveryConfiguration _recoveryConfiguration = Impl.RecoveryConfiguration.Create();
 
-
     private ConnectionSettingBuilder()
     {
     }
@@ -27,7 +27,6 @@ public static ConnectionSettingBuilder Create()
         return new ConnectionSettingBuilder();
     }
 
-
     public ConnectionSettingBuilder Host(string host)
     {
         _host = host;
@@ -52,16 +51,15 @@ public ConnectionSettingBuilder Password(string password)
         return this;
     }
 
-
     public ConnectionSettingBuilder Scheme(string scheme)
     {
         _scheme = scheme;
         return this;
     }
 
-    public ConnectionSettingBuilder ConnectionName(string connection)
+    public ConnectionSettingBuilder ConnectionName(string connectionName)
     {
-        _connection = connection;
+        _connectionName = connectionName;
         return this;
     }
 
@@ -71,6 +69,18 @@ public ConnectionSettingBuilder VirtualHost(string virtualHost)
         return this;
     }
 
+    public ConnectionSettingBuilder SaslMechanism(SaslMechanism saslMechanism)
+    {
+        _saslMechanism = saslMechanism;
+        if (_saslMechanism == Client.SaslMechanism.External)
+        {
+            _user = null;
+            _password = null;
+        }
+
+        return this;
+    }
+
     public ConnectionSettingBuilder RecoveryConfiguration(IRecoveryConfiguration recoveryConfiguration)
     {
         _recoveryConfiguration = recoveryConfiguration;
@@ -81,7 +91,10 @@ public ConnectionSettings Build()
     {
         var c = new ConnectionSettings(_host, _port, _user,
             _password, _virtualHost,
-            _scheme, _connection) { RecoveryConfiguration = (RecoveryConfiguration)_recoveryConfiguration };
+            _scheme, _connectionName, _saslMechanism)
+        {
+            RecoveryConfiguration = (RecoveryConfiguration)_recoveryConfiguration
+        };
 
         return c;
     }
@@ -96,6 +109,7 @@ public class ConnectionSettings : IConnectionSettings
     private readonly string _connectionName = "";
     private readonly string _virtualHost = "/";
     private readonly ITlsSettings? _tlsSettings;
+    private readonly SaslMechanism _saslMechanism = SaslMechanism.Plain;
 
     public ConnectionSettings(string address, ITlsSettings? tlsSettings = null)
     {
@@ -109,15 +123,16 @@ public ConnectionSettings(string address, ITlsSettings? tlsSettings = null)
     }
 
     public ConnectionSettings(string host, int port,
-        string user, string password,
+        string? user, string? password,
         string virtualHost, string scheme, string connectionName,
-        ITlsSettings? tlsSettings = null)
+        SaslMechanism saslMechanism, ITlsSettings? tlsSettings = null)
     {
         _address = new Address(host: host, port: port,
             user: user, password: password,
             path: "/", scheme: scheme);
         _connectionName = connectionName;
         _virtualHost = virtualHost;
+        _saslMechanism = saslMechanism;
         _tlsSettings = tlsSettings;
 
         if (_address.UseSsl && _tlsSettings == null)
@@ -129,12 +144,13 @@ public ConnectionSettings(string host, int port,
     public string Host => _address.Host;
     public int Port => _address.Port;
     public string VirtualHost => _virtualHost;
-    public string User => _address.User;
-    public string Password => _address.Password;
+    public string? User => _address.User;
+    public string? Password => _address.Password;
     public string Scheme => _address.Scheme;
     public string ConnectionName => _connectionName;
     public string Path => _address.Path;
     public bool UseSsl => _address.UseSsl;
+    public SaslMechanism SaslMechanism => _saslMechanism;
 
     public ITlsSettings? TlsSettings => _tlsSettings;
 
@@ -279,7 +295,7 @@ public static BackOffDelayPolicy Create()
     {
         return new BackOffDelayPolicy();
     }
-    
+
     public static BackOffDelayPolicy Create(int maxAttempt)
     {
         return new BackOffDelayPolicy(maxAttempt);

RabbitMQ.AMQP.Client/RabbitMQ.AMQP.Client.csproj

@@ -24,7 +24,6 @@
     <None Include="$(MSBuildThisFileDirectory)..\LICENSE" Pack="true" Visible="false" PackagePath="" />
     <None Include="$(MSBuildThisFileDirectory)..\LICENSE-APACHE2" Pack="true" Visible="false" PackagePath="" />
     <None Include="$(MSBuildThisFileDirectory)..\LICENSE-MPL-RabbitMQ" Pack="true" Visible="false" PackagePath="" />
-    <Folder Include="Metrics/" />
     <InternalsVisibleTo Include="Tests" />
     <InternalsVisibleTo Include="DynamicProxyGenAssembly2" />
   </ItemGroup>

RabbitMQ.AMQP.Client/SaslMechanism.cs

@@ -0,0 +1,57 @@
+namespace RabbitMQ.AMQP.Client
+{
+    public class SaslMechanism : IEquatable<SaslMechanism>
+    {
+        public static readonly SaslMechanism Plain = new("PLAIN");
+        public static readonly SaslMechanism External = new("EXTERNAL");
+
+        private readonly string _saslMechanism;
+
+        private SaslMechanism(string saslMechanism)
+        {
+            _saslMechanism = saslMechanism;
+        }
+
+        public string Mechanism => _saslMechanism;
+
+        public override bool Equals(object? obj)
+        {
+            if (obj is null)
+            {
+                return false;
+            }
+
+            if (obj is not SaslMechanism)
+            {
+                return false;
+            }
+
+            if (Object.ReferenceEquals(this, obj))
+            {
+                return true;
+            }
+
+            return GetHashCode() == obj.GetHashCode();
+        }
+
+        public bool Equals(SaslMechanism? other)
+        {
+            if (other is null)
+            {
+                return false;
+            }
+
+            if (Object.ReferenceEquals(this, other))
+            {
+                return true;
+            }
+
+            return GetHashCode() == other.GetHashCode();
+        }
+
+        public override int GetHashCode()
+        {
+            return _saslMechanism.GetHashCode();
+        }
+    }
+}

Tests/ConnectionRecoveryTests.cs

@@ -60,10 +60,10 @@ public async Task NormalCloseTheStatusShouldBeCorrectAndErrorNull(bool activeRec
             ConnectionSettingBuilder.Create().ConnectionName(connectionName).RecoveryConfiguration(
                 RecoveryConfiguration.Create().Activated(activeRecovery).Topology(false)).Build());
 
-        var completion = new TaskCompletionSource();
+        TaskCompletionSource completion = new TaskCompletionSource();
         var listFromStatus = new List<State>();
         var listToStatus = new List<State>();
-        var listError = new List<Error>();
+        var listError = new List<Error?>();
         connection.ChangeState += (sender, from, to, error) =>
         {
             listFromStatus.Add(from);
@@ -103,14 +103,14 @@ public async Task NormalCloseTheStatusShouldBeCorrectAndErrorNull(bool activeRec
     public async Task UnexpectedCloseTheStatusShouldBeCorrectAndErrorNotNull()
     {
         const string connectionName = "unexpected-close-connection-name";
-        var connection = await AmqpConnection.CreateAsync(
+        IConnection connection = await AmqpConnection.CreateAsync(
             ConnectionSettingBuilder.Create().ConnectionName(connectionName).RecoveryConfiguration(
                 RecoveryConfiguration.Create().Activated(true).Topology(false)
                     .BackOffDelayPolicy(new FakeFastBackOffDelay())).Build());
         var resetEvent = new ManualResetEvent(false);
         var listFromStatus = new List<State>();
         var listToStatus = new List<State>();
-        var listError = new List<Error>();
+        var listError = new List<Error?>();
         connection.ChangeState += (sender, previousState, currentState, error) =>
         {
             listFromStatus.Add(previousState);
@@ -170,7 +170,10 @@ public async Task OverrideTheBackOffWithBackOffDisabled()
         {
             listFromStatus.Add(previousState);
             listToStatus.Add(currentState);
-            listError.Add(error);
+            if (error is not null)
+            {
+                listError.Add(error);
+            }
             if (listError.Count >= 4)
             {
                 resetEvent.Set();