SMTP.SendEmail - Add OAuth support

Frends.SMTP.SendEmail/CHANGELOG.md

@@ -1,5 +1,20 @@
 # Changelog
 
+## [1.2.0] - 2023-12-21
+### Changed
+- Changed Task to use MailKit library instead of deprecated System.Net.Mail.
+- Changed the Task to create a temp file from the AttachmentFromString. The temp file will be removed afterwards.
+
+### Added
+- Added OAuth2 support.
+- New parameters:
+	- SecureSocket
+	- UseOAuth2
+	- Token
+
+### Removed
+- Removed UseWindowsAuthentication because it's not supported with the new library.
+
 ## [1.1.0] - 2023-11-29
 ### Fixed
 - [Breaking] Fixed issue with the attachments can't be given as expression by adding AttachmentOptions class.

Frends.SMTP.SendEmail/Frends.Smtp.SendEmail.Tests/SendEmailTests.cs

@@ -1,6 +1,7 @@
 using NUnit.Framework;
 using System;
 using System.IO;
+using System.Threading.Tasks;
 using Frends.SMTP.SendEmail.Definitions;
 
 namespace Frends.SMTP.SendEmail.Tests;
@@ -15,8 +16,6 @@ public class SendEmailTests
     private static readonly string TOEMAILADDRESS = Environment.GetEnvironmentVariable("Frends_SMTP_Email");
     private static readonly string FROMEMAILADDRESS = Environment.GetEnvironmentVariable("Frends_SMTP_Email");
     private const int PORT = 587;
-    private const bool USESSL = true;
-    private const bool USEWINDOWSAUTHENTICATION = false;
     // ************************************************************************************************************
 
 
@@ -75,11 +74,12 @@ public void EmailTestSetup()
             Password = PASSWORD,
             SMTPServer = SMTPADDRESS,
             Port = PORT,
-            UseSsl = USESSL,
-            UseWindowsAuthentication = USEWINDOWSAUTHENTICATION,
+            UseOAuth2 = false,
+            SecureSocket = SecureSocketOption.None
         };
 
     }
+
     [TearDown]
     public void EmailTestTearDown()
     {
@@ -88,17 +88,17 @@ public void EmailTestTearDown()
     }
 
     [Test]
-    public void SendEmailWithPlainText()
+    public async Task SendEmailWithPlainText()
     {
         var input = _input;
         input.Subject = "Email test - PlainText";
 
-        var result = SMTP.SendEmail(input, null, _options, default);
+        var result = await SMTP.SendEmail(input, null, _options, default);
         Assert.IsTrue(result.EmailSent);
     }
 
     [Test]
-    public void SendEmailWithFileAttachment()
+    public async Task SendEmailWithFileAttachment()
     {
         var input = _input;
         input.Subject = "Email test - FileAttachment";
@@ -114,12 +114,12 @@ public void SendEmailWithFileAttachment()
 
         var Attachments = new AttachmentOptions { Attachments = new Attachment[] { attachment } };
 
-        var result = SMTP.SendEmail(input, Attachments, _options, default);
+        var result = await SMTP.SendEmail(input, Attachments, _options, default);
         Assert.IsTrue(result.EmailSent);
     }
 
     [Test]
-    public void SendEmailWithStringAttachment()
+    public async Task SendEmailWithStringAttachment()
     {
         var input = _input;
         input.Subject = "Email test - AttachmentFromString";
@@ -131,12 +131,12 @@ public void SendEmailWithStringAttachment()
         };
         var Attachments = new AttachmentOptions { Attachments = new Attachment[] { attachment } };
 
-        var result = SMTP.SendEmail(input, Attachments, _options, default);
+        var result = await SMTP.SendEmail(input, Attachments, _options, default);
         Assert.IsTrue(result.EmailSent);
     }
 
     [Test]
-    public void TrySendingEmailWithNoFileAttachmentFound()
+    public async Task TrySendingEmailWithNoFileAttachmentFound()
     {
         var input = _input;
         input.Subject = "Email test";
@@ -151,12 +151,12 @@ public void TrySendingEmailWithNoFileAttachmentFound()
 
         var Attachments = new AttachmentOptions { Attachments = new Attachment[] { attachment } };
 
-        var result = SMTP.SendEmail(input, Attachments, _options, default);
+        var result = await SMTP.SendEmail(input, Attachments, _options, default);
         Assert.IsFalse(result.EmailSent);
     }
 
     [Test]
-    public void TrySendingEmailWithNoCcAndBcc()
+    public async Task TrySendingEmailWithNoCcAndBcc()
     {
         var input = _input2;
         input.Subject = "Email test";
@@ -171,7 +171,7 @@ public void TrySendingEmailWithNoCcAndBcc()
 
         var Attachments = new AttachmentOptions { Attachments = new Attachment[] { attachment } };
 
-        var result = SMTP.SendEmail(input, Attachments, _options, default);
+        var result = await SMTP.SendEmail(input, Attachments, _options, default);
         Assert.IsFalse(result.EmailSent);
     }
 
@@ -191,7 +191,7 @@ public void TrySendingEmailWithNoFileAttachmentFoundException()
 
         var Attachments = new AttachmentOptions { Attachments = new Attachment[] { attachment } };
 
-        Assert.Throws<FileNotFoundException>(() => SMTP.SendEmail(input, Attachments, _options, default));
-
+        var ex = Assert.ThrowsAsync<FileNotFoundException>(async () => await SMTP.SendEmail(input, Attachments, _options, default));
+        Assert.AreEqual(@$"The given filepath '{attachment.FilePath}' had no matching files", ex.Message);
     }
 }

Frends.SMTP.SendEmail/Frends.Smtp.SendEmail/Definitions/Attachment.cs

@@ -11,31 +11,36 @@ public class Attachment
     /// <summary>
     /// Chooses if the attachment file is created from a string or copied from disk.
     /// </summary>
+    /// <example>AttachmentType.FileAttachment</example>
     public AttachmentType AttachmentType { get; set; }
 
     /// <summary>
     /// Attachment from string.
     /// </summary>
+    /// <example>AttachmentFromString { "Test file content", "testFile.txt" }</example>
     [UIHint(nameof(AttachmentType), "", AttachmentType.AttachmentFromString)]
     public AttachmentFromString StringAttachment { get; set; }
 
     /// <summary>
     /// Attachment file's path. Uses Directory.GetFiles(string, string) as a pattern matching technique. See https://msdn.microsoft.com/en-us/library/wz42302f(v=vs.110).aspx.
     /// Exception: If the path ends in a directory, all files in that folder are added as attachments.
     /// </summary>
+    /// <example>C:\path\to\file.txt</example>
     [DefaultValue("")]
     [UIHint(nameof(AttachmentType), "", AttachmentType.FileAttachment)]
     public string FilePath { get; set; }
 
     /// <summary>
     /// If set true and no files match the given path, an exception is thrown.
     /// </summary>
+    /// <example>true</example>
     [UIHint(nameof(AttachmentType), "", AttachmentType.FileAttachment)]
     public bool ThrowExceptionIfAttachmentNotFound { get; set; }
 
     /// <summary>
     /// If set true and no files match the given path, email will be sent nevertheless.
     /// </summary>
+    /// <example>true</example>
     [UIHint(nameof(AttachmentType), "", AttachmentType.FileAttachment)]
     public bool SendIfNoAttachmentsFound { get; set; }
 }

Frends.SMTP.SendEmail/Frends.Smtp.SendEmail/Definitions/Input.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
 
 namespace Frends.SMTP.SendEmail.Definitions;
 
@@ -11,48 +12,55 @@ public class Input
     /// Recipient addresses separated by ',' or ';'
     /// </summary>
     /// <example>jane.doe@somedomain.com</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("jane.doe@somedomain.com")]
     public string To { get; set; }
 
     /// <summary>
     /// Cc recipient addresses separated by ',' or ';'
     /// </summary>
     /// <example>jane.doe@somedomain.com</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("jane.doe@somedomain.com")]
     public string Cc { get; set; }
 
     /// <summary>
     /// Bcc recipient addresses separated by ',' or ';'
     /// </summary>
     /// <example>jane.doe@somedomain.com</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("jane.doe@somedomain.com")]
     public string Bcc { get; set; }
 
     /// <summary>
     /// Sender address.
     /// </summary>
     /// <example>jane.doe@somedomain.com</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("john.doe@somedomain.com")]
     public string From { get; set; }
 
     /// <summary>
     /// Name of the sender.
     /// </summary>
     /// <example>Jane Doe</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("")]
     public string SenderName { get; set; }
 
     /// <summary>
     /// Email message's subject.
     /// </summary>
     /// <example>Hello Jane</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("Hello Jane")]
     public string Subject { get; set; }
 
     /// <summary>
     /// Body of the message.
     /// </summary>
-    /// <exmaple>You've got mail!</exmaple>
+    /// <example>You've got mail!</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("You've got mail!")]
     public string Message { get; set; }
 
@@ -67,6 +75,7 @@ public class Input
     /// Encoding of message body and subject. Use following table's name column for other options. https://msdn.microsoft.com/en-us/library/system.text.encoding(v=vs.110).aspx#Anchor_5 
     /// </summary>
     /// <example>utf-8</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("utf-8")]
     public string MessageEncoding { get; set; }
 

Frends.SMTP.SendEmail/Frends.Smtp.SendEmail/Definitions/Options.cs

@@ -12,6 +12,7 @@ public class Options
     /// SMTP server address.
     /// </summary>
     /// <example>smtp.somedomain.com</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("smtp.somedomain.com")]
     public string SMTPServer { get; set; }
 
@@ -23,25 +24,34 @@ public class Options
     public int Port { get; set; }
 
     /// <summary>
-    /// Set this true if SMTP expects to be connected using SSL.
+    /// Choose the SecureSocketOption to use, default is Auto
     /// </summary>
-    /// <exmaple>true</exmaple>
-    [DefaultValue("false")]
-    public bool UseSsl { get; set; }
+    /// <example>SecureSocketOption.None</example>
+    [DefaultValue(SecureSocketOption.Auto)]
+    public SecureSocketOption SecureSocket { get; set; }
 
     /// <summary>
-    /// Set this true if you want to use windows authentication to authenticate to SMTP server.
+    /// Set this true if SMTP server expectes OAuth token.
     /// </summary>
-    /// <example>false</example>
-    [DefaultValue("true")]
-    public bool UseWindowsAuthentication { get; set; }
+    /// <example>true</example>
+    [DefaultValue(false)]
+    public bool UseOAuth2 { get; set; }
+
+    /// <summary>
+    /// Token to be used when using OAuth2.
+    /// </summary>
+    /// <example>cec4ce4f98e4f68e4vc89v1489v4987s4erv8794...</example>
+    [DisplayFormat(DataFormatString = "Text")]
+    [UIHint(nameof(UseOAuth2), "", true)]
+    [PasswordPropertyText]
+    public string Token { get; set; }
 
     /// <summary>
     /// Use this username to log in to the SMTP server
     /// </summary>
     /// <example>testuser</example>
+    [DisplayFormat(DataFormatString = "Text")]
     [DefaultValue("")]
-    [UIHint(nameof(UseWindowsAuthentication), "", false)]
     public string UserName { get; set; }
 
     /// <summary>
@@ -50,6 +60,6 @@ public class Options
     /// <example>Password123</example>
     [PasswordPropertyText(true)]
     [DefaultValue("")]
-    [UIHint(nameof(UseWindowsAuthentication), "", false)]
+    [UIHint(nameof(UseOAuth2), "", false)]
     public string Password { get; set; }
 }

Frends.SMTP.SendEmail/Frends.Smtp.SendEmail/Definitions/SecureSocketOption.cs

@@ -0,0 +1,32 @@
+namespace Frends.SMTP.SendEmail.Definitions;
+
+/// <summary>
+/// Secure Socket Options.
+/// </summary>
+public enum SecureSocketOption
+{
+    /// <summary>
+    /// No SSL or TLS encryption should be used. 
+    /// </summary>
+    None,
+    /// <summary>
+    /// Allow the IMailService to decide which SSL or TLS options to use (default). 
+    /// If the server does not support SSL or TLS, then the connection will continue without any encryption.
+    /// </summary>
+    Auto,
+    /// <summary>
+    /// The connection should use SSL or TLS encryption immediately.
+    /// </summary>
+    SslOnConnect,
+    /// <summary>
+    /// Elevates the connection to use TLS encryption immediately after reading the greeting and capabilities of 
+    /// the server. If the server does not support the STARTTLS extension, then the connection will fail and a 
+    /// NotSupportedException will be thrown.
+    /// </summary>
+    StartTls,
+    /// <summary>
+    /// Elevates the connection to use TLS encryption immediately after reading the greeting and capabilities of 
+    /// the server, but only if the server supports the STARTTLS extension.
+    /// </summary>
+    StartTlsWhenAvailable
+}

Frends.SMTP.SendEmail/Frends.Smtp.SendEmail/Frends.Smtp.SendEmail.csproj

@@ -1,9 +1,8 @@
-
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
   <TargetFramework>net6.0</TargetFramework>
-	<Version>1.1.0</Version>
+	<Version>1.2.0</Version>
 	<LangVersion>latest</LangVersion>
 	<Authors>Frends</Authors>
 	<Company>Frends</Company>
@@ -24,6 +23,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="System.ComponentModel.Annotations" Version="5.0.0" />
+	<PackageReference Include="MailKit" Version="4.3.0" />
   </ItemGroup>
 
   <ItemGroup>