refactor: remove obsolete resource download and installer endpoints

- Deleted the `POST /resources/get/{dataFolder?}` and `GET /resources/get-installer` endpoints as part of the architectural shift towards simplified resource management.
- Removed associated methods and configurations, including `ResourcesService.GetEncryptedResource`, `ResourcesService.GetInstaller`, and related properties in `ResourcesConfig`.
- Cleaned up environment variables and configuration files to reflect the removal of installer-related settings.
- Eliminated the `GetResourceRequest` DTO and its validator, along with the `WrongResourceName` error code.
- Updated documentation to clarify the changes in resource handling and the retirement of per-user file encryption.

Co-authored-by: Cursor <cursoragent@cursor.com>

Azaion.Services/ResourcesService.cs

@@ -8,8 +8,6 @@ namespace Azaion.Services;
 
 public interface IResourcesService
 {
-    (string?, Stream?) GetInstaller(bool isStage);
-    Task<Stream> GetEncryptedResource(string? dataFolder, string fileName, string key, CancellationToken cancellationToken = default);
     Task SaveResource(string? dataFolder, IFormFile data, CancellationToken cancellationToken = default);
     Task<IEnumerable<string>> ListResources(string? dataFolder, string? search, CancellationToken cancellationToken = default);
     void ClearFolder(string? dataFolder);
@@ -24,29 +22,6 @@ public class ResourcesService(IOptions<ResourcesConfig> resourcesConfig, ILogger
             : Path.Combine(resourcesConfig.Value.ResourcesFolder, dataFolder);
     }
 
-    public (string?, Stream?) GetInstaller(bool isStage)
-    {
-        var suiteFolder = Path.Combine(resourcesConfig.Value.ResourcesFolder, isStage
-            ? resourcesConfig.Value.SuiteStageInstallerFolder
-            : resourcesConfig.Value.SuiteInstallerFolder);
-        var installer = new DirectoryInfo(suiteFolder).GetFiles("AzaionSuite.Iterative*").FirstOrDefault();
-        if (installer == null)
-            return (null, null);
-
-        var fileStream = new FileStream(installer.FullName, FileMode.Open, FileAccess.Read);
-        return (installer.Name, fileStream);
-    }
-
-    public async Task<Stream> GetEncryptedResource(string? dataFolder, string fileName, string key, CancellationToken cancellationToken = default)
-    {
-        var fileStream = new FileStream(Path.Combine(GetResourceFolder(dataFolder), fileName), FileMode.Open, FileAccess.Read);
-
-        var ms = new MemoryStream();
-        await fileStream.EncryptTo(ms, key, cancellationToken);
-        ms.Seek(0, SeekOrigin.Begin);
-        return ms;
-    }
-
     public async Task SaveResource(string? dataFolder, IFormFile data, CancellationToken cancellationToken = default)
     {
         if (data == null)

Azaion.Services/Security.cs

@@ -1,61 +1,10 @@
 using System.Security.Cryptography;
 using System.Text;
-using Azaion.Common.Entities;
 
 namespace Azaion.Services;
 
 public static class Security
 {
-    private const int BUFFER_SIZE = 524288; // 512 KB buffer size
-
     public static string ToHash(this string str) =>
         Convert.ToBase64String(SHA384.HashData(Encoding.UTF8.GetBytes(str)));
-
-    public static string GetApiEncryptionKey(string email, string password) =>
-        $"{email}-{password}-#%@AzaionKey@%#---".ToHash();
-
-    public static async Task EncryptTo(this Stream inputStream, Stream toStream, string key, CancellationToken cancellationToken = default)
-    {
-        inputStream.Seek(0, SeekOrigin.Begin);
-        if (inputStream is { CanRead: false }) throw new ArgumentNullException(nameof(inputStream));
-        if (key is not { Length: > 0 }) throw new ArgumentNullException(nameof(key));
-
-        using var aes = Aes.Create();
-        aes.Mode = CipherMode.CBC;
-        aes.Padding = PaddingMode.PKCS7;
-        aes.Key = SHA256.HashData(Encoding.UTF8.GetBytes(key));
-        aes.GenerateIV();
-        using var encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
-
-        await using var cs = new CryptoStream(toStream, encryptor, CryptoStreamMode.Write, leaveOpen: true);
-
-        await toStream.WriteAsync(aes.IV.AsMemory(0, aes.IV.Length), cancellationToken);
-
-        var buffer = new byte[BUFFER_SIZE];
-        int bytesRead;
-        while ((bytesRead = await inputStream.ReadAsync(buffer, cancellationToken)) > 0)
-            await cs.WriteAsync(buffer.AsMemory(0, bytesRead), cancellationToken);
-    }
-
-    public static async Task DecryptTo(this Stream encryptedStream, Stream toStream, string key, CancellationToken cancellationToken = default)
-    {
-        encryptedStream.Seek(0, SeekOrigin.Begin);
-        using var aes = Aes.Create();
-        aes.Key = SHA256.HashData(Encoding.UTF8.GetBytes(key));
-
-        var iv = new byte[aes.BlockSize / 8];
-        _ = await encryptedStream.ReadAsync(iv, cancellationToken);
-        aes.IV = iv;
-        aes.Mode = CipherMode.CBC;
-        aes.Padding = PaddingMode.PKCS7;
-        using var decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
-
-        await using var cryptoStream = new CryptoStream(encryptedStream, decryptor, CryptoStreamMode.Read, leaveOpen: true);
-
-        var buffer = new byte[BUFFER_SIZE];
-        int bytesRead;
-        while ((bytesRead = await cryptoStream.ReadAsync(buffer, cancellationToken)) > 0)
-            await toStream.WriteAsync(buffer.AsMemory(0, bytesRead), cancellationToken);
-        toStream.Seek(0, SeekOrigin.Begin);
-    }
 }