SVN

2026-01-21 03:07:35 +09:00
commit 5c7516f60f
19 changed files with 15472 additions and 0 deletions
--- a/Managers/PinManager.cs
+++ b/Managers/PinManager.cs
@@ -0,0 +1,208 @@
+using Microsoft.Data.Sqlite;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace SimPas2_Windows.Managers
+{
+  public class PinManager
+  {
+    private readonly string mConnectionString;
+    private readonly byte[] mEncryptionKey;
+    private readonly string mCulture;
+
+    private string mJpLang;
+
+    public PinManager(string databasePath, byte[] encryptionKey, string culture)
+    {
+      mConnectionString = $"Data Source={databasePath}";
+      mEncryptionKey = encryptionKey ?? throw new ArgumentNullException(nameof(encryptionKey));
+      mCulture = culture;
+
+      mJpLang = "ja-JP";
+    }
+
+    private bool AlreadyExists(string website, int? excludeId = null)
+    {
+      using (SqliteConnection conn = new SqliteConnection(mConnectionString))
+      {
+        conn.Open();
+        SqliteCommand com = conn.CreateCommand();
+        com.CommandText = @"
+          SELECT COUNT(*) FROM Pin
+          WHERE UPPER(Website) = UPPER(@website)";
+        com.Parameters.AddWithValue("@website", website);
+
+        if (excludeId.HasValue)
+        {
+          com.CommandText += " AND Id != @excludeId";
+          com.Parameters.AddWithValue("@excludeId", excludeId.Value);
+        }
+
+        return Convert.ToInt32(com.ExecuteScalar()) > 0;
+      }
+    }
+
+    public void AddPin(string website, string pincode, string note)
+    {
+      if (string.IsNullOrWhiteSpace(website) || string.IsNullOrWhiteSpace(pincode))
+      {
+        string err = mCulture == mJpLang
+          ? "ウェブサイト及び暗証番号を御入力下さい。"
+          : "Please fill in the website and pincode.";
+        throw new ArgumentException(err);
+      }
+
+      if (AlreadyExists(website))
+      {
+        string err = mCulture == mJpLang
+          ? $"ウェブサイト「{website}」付き暗証番号は既に存在します。"
+          : $"A pincode with the website '{website}' already exists.";
+        throw new ArgumentException(err);
+      }
+
+      string encryptedPin = EncryptPin(pincode);
+      using (SqliteConnection conn = new SqliteConnection(mConnectionString))
+      {
+        conn.Open();
+        SqliteCommand com = conn.CreateCommand();
+        com.CommandText = @"INSERT INTO Pin (Website, Pincode, Note) VALUES ($website, $pincode, $note)";
+        com.Parameters.AddWithValue("$website", website);
+        com.Parameters.AddWithValue("$pincode", encryptedPin);
+        com.Parameters.AddWithValue("$note", string.IsNullOrEmpty(note) ? DBNull.Value : note);
+        com.ExecuteNonQuery();
+      }
+    }
+
+    public bool EditPin(int id, string website, string pincode, string note)
+    {
+      if (string.IsNullOrWhiteSpace(website) || string.IsNullOrWhiteSpace(pincode))
+      {
+        string err = mCulture == mJpLang
+          ? "ウェブサイト及び暗証番号を御入力下さい。"
+          : "Please fill in the website and pincode.";
+        throw new ArgumentException(err);
+      }
+
+      if (AlreadyExists(website, id))
+      {
+        string err = mCulture == mJpLang
+          ? $"ウェブサイト「{website}」付き暗証番号は既に存在します。"
+          : $"A pincode with the website '{website}' already exists.";
+        throw new ArgumentException(err);
+      }
+
+      string encryptedPin = EncryptPin(pincode);
+      using (SqliteConnection conn = new SqliteConnection(mConnectionString))
+      {
+        conn.Open();
+        SqliteCommand com = conn.CreateCommand();
+        com.CommandText = @"UPDATE Pin SET Website = $website, Pincode = $pincode, Note = $note WHERE Id = $id";
+        com.Parameters.AddWithValue("id", id);
+        com.Parameters.AddWithValue("$website", website);
+        com.Parameters.AddWithValue("$pincode", encryptedPin);
+        com.Parameters.AddWithValue("$note", string.IsNullOrEmpty(note) ? DBNull.Value : note);
+
+        return com.ExecuteNonQuery() > 0;
+      }
+    }
+
+    public bool DeletePin(int id)
+    {
+      using (SqliteConnection conn = new SqliteConnection(mConnectionString))
+      {
+        conn.Open();
+        SqliteCommand com = conn.CreateCommand();
+        com.CommandText = "DELETE FROM Pin WHERE Id = $id";
+        com.Parameters.AddWithValue("$id", id);
+
+        return com.ExecuteNonQuery() > 0;
+      }
+    }
+
+    public List<(int Id, string Website, string Pincode, string Note)> GetAll(string keyword = "")
+    {
+      var pins = new List<(int, string, string, string)>();
+      using (SqliteConnection conn = new SqliteConnection(mConnectionString))
+      {
+        conn.Open();
+        SqliteCommand com = conn.CreateCommand();
+
+        if (string.IsNullOrWhiteSpace(keyword))
+        {
+          com.CommandText = @"
+            SELECT Id, Website, Pincode, Note FROM Pin
+            ORDER BY Website ASC";
+        }
+        else
+        {
+          com.CommandText = @"
+            SELECT Id, Website, Pincode, Note FROM Pin
+            WHERE Website LIKE @keyword
+            ORDER BY Website ASC";
+          com.Parameters.AddWithValue("@keyword", $"%{keyword}%");
+        }
+
+          using (SqliteDataReader reader = com.ExecuteReader())
+          {
+            while (reader.Read())
+            {
+              string encryptedPin = reader.GetString(2);
+              string decryptedPin = DecryptPin(encryptedPin);
+              pins.Add((
+                reader.GetInt32(0),
+                reader.GetString(1),
+                decryptedPin,
+                reader.IsDBNull(3) ? string.Empty : reader.GetString(3)
+              ));
+            }
+          }
+      }
+
+      return pins;
+    }
+
+    private string EncryptPin(string plainPassword)
+    {
+      using (Aes aes = Aes.Create())
+      {
+        aes.Key = mEncryptionKey;
+        aes.GenerateIV();
+        byte[] iv = aes.IV;
+
+        using (var encryptor = aes.CreateEncryptor(aes.Key, iv))
+        {
+          byte[] plainBytes = Encoding.UTF8.GetBytes(plainPassword);
+          byte[] encryptedBytes = encryptor.TransformFinalBlock(plainBytes, 0, plainBytes.Length);
+          byte[] result = new byte[iv.Length + encryptedBytes.Length];
+
+          Buffer.BlockCopy(iv, 0, result, 0, iv.Length);
+          Buffer.BlockCopy(encryptedBytes, 0, result, iv.Length, encryptedBytes.Length);
+
+          return Convert.ToBase64String(result);
+        }
+      }
+    }
+
+    private string DecryptPin(string encryptedPassword)
+    {
+      byte[] combined = Convert.FromBase64String(encryptedPassword);
+      byte[] iv = new byte[16]; // AES IV is 16 bytes
+      byte[] encryptedBytes = new byte[combined.Length - iv.Length];
+
+      Buffer.BlockCopy(combined, 0, iv, 0, iv.Length);
+      Buffer.BlockCopy(combined, iv.Length, encryptedBytes, 0, encryptedBytes.Length);
+
+      using (Aes aes = Aes.Create())
+      {
+        aes.Key = mEncryptionKey;
+        aes.IV = iv;
+
+        using (var decryptor = aes.CreateDecryptor(aes.Key, aes.IV))
+        {
+          byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);
+          return Encoding.UTF8.GetString(decryptedBytes);
+        }
+      }
+    }
+  }
+}