Add ShortSubject and ShortIssuer to Certificate entity (#6234)

Progress on #6183

src/NuGetGallery.Core/Entities/Certificate.cs

@@ -33,10 +33,20 @@ public class Certificate : IEntity
         public string Subject { get; set; }
 
         /// <summary>
-        /// The subject distinguished name of the certificate.
+        /// The short subject of the certificate. In most cases, this is the CN attribute.
+        /// </summary>
+        public string ShortSubject { get; set; }
+
+        /// <summary>
+        /// The issuer distinguished name of the certificate.
         /// </summary>
         public string Issuer { get; set; }
 
+        /// <summary>
+        /// The short issuer of the certificate. In most cases, this is the CN attribute.
+        /// </summary>
+        public string ShortIssuer { get; set; }
+
         /// <summary>
         /// The expiration date and time of the certificate.
         /// </summary>

src/NuGetGallery/Migrations/201807302212501_AddShortCertificateNames.cs

@@ -0,0 +1,20 @@
+namespace NuGetGallery.Migrations
+{
+    using System;
+    using System.Data.Entity.Migrations;
+
+    public partial class AddShortCertificateNames : DbMigration
+    {
+        public override void Up()
+        {
+            AddColumn("dbo.Certificates", "ShortSubject", c => c.String());
+            AddColumn("dbo.Certificates", "ShortIssuer", c => c.String());
+        }
+
+        public override void Down()
+        {
+            DropColumn("dbo.Certificates", "ShortIssuer");
+            DropColumn("dbo.Certificates", "ShortSubject");
+        }
+    }
+}