private static string DecryptContent004(string encContent, string encItemKey, Guid?itemsKeyID, StandardNoteData dat)
{
StandardNoteAPI.Logger.TraceExt(StandardNotePlugin.Name, "Decrypt content with schema [002]",
("encContent", encContent),
("encItemKey", encItemKey),
("itemsKeyID", itemsKeyID?.ToString() ?? "NULL"));
var keyOuter = dat.SessionData.RootKey_MasterKey;
if (itemsKeyID != null)
{
var itemskey = dat.ItemsKeys.FirstOrDefault(p => p.UUID == itemsKeyID);
if (itemskey == null)
{
throw new StandardNoteAPIException($"Could not decrypt item (Key {itemsKeyID} not found)");
}
StandardNoteAPI.Logger.TraceExt(StandardNotePlugin.Name, $"Found itemskey: {itemskey.UUID}",
("itemskey.IsDefault", itemskey.IsDefault.ToString()),
("itemskey.Version", itemskey.Version),
("itemskey.Key", EncodingConverter.ByteToHexBitFiddleLowercase(itemskey.Key)));
keyOuter = itemskey.Key;
}
var keyInner = Decrypt004(encItemKey, keyOuter);
return(Decrypt004(encContent, EncodingConverter.StringToByteArrayCaseInsensitive(keyInner)));
}
public string ReadString(int length)
{
int offset = _offset;
this._offset += length;
return(EncodingConverter.GetString(_buffer, offset, length));
}
/// <summary>
/// Do not call this constructor directly. Use <see cref="SessionUtility.GetSessionManager(INotepadsCore)" instead./>
/// </summary>
public SessionManager(INotepadsCore notepadsCore)
{
_notepadsCore = notepadsCore;
_semaphoreSlim = new SemaphoreSlim(1, 1);
_encodingConverter = new EncodingConverter();
_loaded = false;
}
public static string RandomSeed(int len)
{
byte[] seed = new byte[len];
RNG.GetBytes(seed);
return(EncodingConverter.ByteToHexBitFiddleLowercase(seed));
}
protected override int Execute()
{
var config = FindConfig();
if (config.Selected.IPAddress == null)
{
return(WriteError("No IP address specified"));
}
WriteDebug($"Target IP address is {config.Selected.IPAddress}");
WriteDebug();
try
{
var mac = ExecuteDirect(config.Selected.IPAddressRaw);
var strmac = EncodingConverter.ByteArrayToHexDump(mac, ":", -1, string.Empty, true);
return(WriteInfoOutput(strmac, $"The MAC address of {config.Selected.IPAddress} is {strmac}"));
}
catch (TaskException)
{
throw;
}
catch (Exception e)
{
return(WriteError($"An error occured while sending ARP package: {e.Message}", e));
}
}
public static (byte[] pw, byte[] mk, string reqpw) CreateAuthData001(StandardNoteAPI.APIResultAuthParams apiparams, string mail, string uip)
{
if (apiparams.pw_func != StandardNoteAPI.PasswordFunc.pbkdf2)
{
throw new Exception("Unsupported pw_func: " + apiparams.pw_func);
}
byte[] bytes;
if (apiparams.pw_alg == StandardNoteAPI.PasswordAlg.sha512)
{
bytes = PBKDF2.GenerateDerivedKey(apiparams.pw_key_size / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
}
else if (apiparams.pw_alg == StandardNoteAPI.PasswordAlg.sha512)
{
bytes = PBKDF2.GenerateDerivedKey(apiparams.pw_key_size / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
}
else
{
throw new Exception("Unknown pw_alg: " + apiparams.pw_alg);
}
var pw = bytes.Take(bytes.Length / 2).ToArray();
var mk = bytes.Skip(bytes.Length / 2).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleLowercase(pw);
return(pw, mk, reqpw);
}
public void EncodingConverter_ConvertIsoBytesToUtf8String_EspanolSubstring()
{
var ec = new EncodingConverter();
var result = ec.ConvertIsoBytesToUtf8String(_espanolSubIsoBytes, 22, 10);
Assert.AreEqual("español.ct", result);
}
/// <summary>
/// Do not call this constructor directly. Use <see cref="SessionUtility.GetSessionManager(INotepadsCore)" instead./>
/// </summary>
public SessionManager(INotepadsCore notepadsCore)
{
_notepadsCore = notepadsCore;
_semaphoreSlim = new SemaphoreSlim(1, 1);
_encodingConverter = new EncodingConverter();
_sessionData = new ConcurrentDictionary<Guid, TextEditorSessionData>();
_loaded = false;
_notepadsCore.TextEditorLoaded += (sender, textEditor) =>
{
textEditor.TextChanging += RemoveTextEditorData;
textEditor.EncodingChanged += RemoveTextEditorData;
textEditor.LineEndingChanged += RemoveTextEditorData;
textEditor.ChangeReverted += RemoveTextEditorData;
textEditor.EditorModificationStateChanged += RemoveTextEditorData;
};
_notepadsCore.TextEditorUnloaded += (sender, textEditor) =>
{
textEditor.TextChanging -= RemoveTextEditorData;
textEditor.EncodingChanged -= RemoveTextEditorData;
textEditor.LineEndingChanged -= RemoveTextEditorData;
textEditor.ChangeReverted -= RemoveTextEditorData;
textEditor.EditorModificationStateChanged -= RemoveTextEditorData;
};
}
public string ReadLenString()
{
int offset = this._offset;
int lenStr = ReadInt32();
this._offset += lenStr;
return(EncodingConverter.GetString(_buffer, offset + 4, lenStr));
}
public static string SHA256Hex(string data)
{
using (var sha = SHA256.Create())
{
var hash = sha.ComputeHash(Encoding.UTF8.GetBytes(data));
return(EncodingConverter.ByteToHexBitFiddleLowercase(hash));
}
}
private static APIResultAuthorize Authenticate003(ISimpleJsonRest web, APIAuthParams apiparams, string mail, string uip, AlephLogger logger)
{
try
{
logger.Debug(StandardNotePlugin.Name, $"AutParams[version:{apiparams.version}, pw_cost:{apiparams.pw_cost}, pw_nonce:{apiparams.pw_nonce}]");
if (apiparams.pw_cost < 100000)
{
throw new StandardNoteAPIException($"Account pw_cost is too small ({apiparams.pw_cost})");
}
var salt = StandardNoteCrypt.SHA256(string.Join(":", mail, "SF", "003", apiparams.pw_cost.ToString(), apiparams.pw_nonce));
byte[] bytes = PBKDF2.GenerateDerivedKey(768 / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
var pw = bytes.Skip(0 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var mk = bytes.Skip(1 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var ak = bytes.Skip(2 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleUppercase(pw).ToLower();
APIResultAuthorize tok;
try
{
tok = web.PostTwoWay <APIResultAuthorize>(new APIRequestUser {
email = mail, password = reqpw
}, "auth/sign_in");
}
catch (RestStatuscodeException e1)
{
if (e1.StatusCode / 100 == 4 && !string.IsNullOrWhiteSpace(e1.HTTPContent))
{
var req = web.ParseJsonOrNull <APIBadRequest>(e1.HTTPContent);
if (req != null)
{
throw new StandardNoteAPIException($"Server returned status {e1.StatusCode}.\nMessage: '{req.error.message}'", e1);
}
}
throw;
}
tok.masterkey = mk;
tok.masterauthkey = ak;
tok.version = "003";
return(tok);
}
catch (RestException)
{
throw;
}
catch (StandardNoteAPIException)
{
throw;
}
catch (Exception e)
{
throw new StandardNoteAPIException("Authentification with StandardNoteAPI failed.", e);
}
}
private static APIResultAuthorize Authenticate002(ISimpleJsonRest web, APIAuthParams apiparams, string mail, string password, IAlephLogger logger)
{
try
{
logger.Debug(StandardNotePlugin.Name, $"AutParams[version:2, pw_cost:{apiparams.pw_cost}]");
if (apiparams.pw_func != PasswordFunc.pbkdf2)
{
throw new Exception("Unknown pw_func: " + apiparams.pw_func);
}
byte[] bytes = PBKDF2.GenerateDerivedKey(768 / 8, Encoding.UTF8.GetBytes(password), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
var pw = bytes.Skip(0 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var mk = bytes.Skip(1 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var ak = bytes.Skip(2 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleUppercase(pw).ToLower();
APIResultAuthorize tok;
try
{
tok = web.PostTwoWay <APIResultAuthorize>(new APIRequestUser {
email = mail, password = reqpw
}, "auth/sign_in");
}
catch (RestStatuscodeException e1)
{
if (e1.StatusCode / 100 == 4 && !string.IsNullOrWhiteSpace(e1.HTTPContent))
{
var req = web.ParseJsonOrNull <APIBadRequest>(e1.HTTPContent);
if (req != null)
{
throw new StandardNoteAPIException($"Server returned status {e1.StatusCode}.\nMessage: '{req.error.message}'", e1);
}
}
throw;
}
tok.masterkey = mk;
tok.masterauthkey = ak;
tok.version = "002";
return(tok);
}
catch (RestException)
{
throw;
}
catch (StandardNoteAPIException)
{
throw;
}
catch (Exception e)
{
throw new StandardNoteAPIException("Authentification with StandardNoteAPI failed.", e);
}
}
private static string DecryptContent002(string encContent, string encItemKey, byte[] masterMK, byte[] masterAK)
{
var item_key = Decrypt002(encItemKey, masterMK, masterAK);
var item_ek = item_key.Substring(0, item_key.Length / 2);
var item_ak = item_key.Substring(item_key.Length / 2, item_key.Length / 2);
return(Decrypt002(encContent, EncodingConverter.StringToByteArrayCaseInsensitive(item_ek), EncodingConverter.StringToByteArrayCaseInsensitive(item_ak)));
}
/// <summary>
/// 一次性读完包的字符串
/// </summary>
/// <returns></returns>
public string ReadString()
{
int len = _dataCount - _offset;
//string value = BitConverter.ToString(_buffer, _offset, len);//16进制标识的字符串
string value = EncodingConverter.GetString(_buffer, _offset, len);
_offset = Interlocked.Add(ref _offset, len);
return(value);
}
/// <summary>
/// Adds an element with the provided key and value to the <see cref="IHeaderDictionary"/>.
/// </summary>
/// <param name="dic">The <see cref="IHeaderDictionary"/> to extend.</param>
/// <param name="key">The string to use as the key of the element to add.</param>
/// <param name="value">The string to use as the value of the element to add.</param>
/// <param name="useAsciiEncodingConversion">if set to <c>true</c> an ASCII encoding conversion is applied to the <paramref name="value"/>.</param>
public static void AddOrUpdateHeader(this IHeaderDictionary dic, string key, StringValues value, bool useAsciiEncodingConversion = true)
{
var headerValue = useAsciiEncodingConversion ? new StringValues(EncodingConverter.ToAsciiEncodedString(value)) : value;
if (headerValue != StringValues.Empty)
{
dic.AddOrUpdate(key, headerValue.ToString().Where(c => !char.IsControl(c)).FromChars());
}
}
/// <summary>
/// 文本全部转成UTF8，UTF8兼容性好 0标志写入结束
/// </summary>
public void WriteString0(string value)
{
if (value.IsNullEmpty())
{
return;
}
byte[] tmpBuffer = EncodingConverter.GetBytes(value);
WriteBuffer(tmpBuffer);
WriteSByte(0);//结束标识
}
private static string DecryptContent001(string encContent, string encItemKey, string authHash, StandardNoteData dat)
{
StandardNoteAPI.Logger.TraceExt(StandardNotePlugin.Name, "Decrypt content with schema [001]",
("encContent", encContent),
("encItemKey", encItemKey),
("authHash", authHash));
byte[] masterkey;
if (dat.SessionData.Version == "001" || dat.SessionData.Version == "002" || dat.SessionData.Version == "003")
{
masterkey = dat.SessionData.RootKey_MasterKey;
StandardNoteAPI.Logger.Trace(StandardNotePlugin.Name, "Use masterkey from session");
}
else
{
var itemskey = dat.ItemsKeys.FirstOrDefault(p => p.Version == "001");
if (itemskey == null)
{
throw new StandardNoteAPIException($"Could not decrypt item (Key for 002 not found)");
}
StandardNoteAPI.Logger.TraceExt(StandardNotePlugin.Name, $"Found itemskey: {itemskey.UUID}",
("itemskey.IsDefault", itemskey.IsDefault.ToString()),
("itemskey.Version", itemskey.Version),
("itemskey.Key", EncodingConverter.ByteToHexBitFiddleLowercase(itemskey.Key)),
("itemskey.AuthKey", EncodingConverter.ByteToHexBitFiddleLowercase(itemskey.AuthKey)));
masterkey = itemskey.Key;
}
var itemKey = EncodingConverter.StringToByteArrayCaseInsensitive(Encoding.ASCII.GetString(AESEncryption.DecryptCBC256(Convert.FromBase64String(encItemKey), masterkey, new byte[16])));
var ek = itemKey.Take(itemKey.Length / 2).ToArray();
var ak = itemKey.Skip(itemKey.Length / 2).ToArray();
var realHash = EncodingConverter.ByteToHexBitFiddleLowercase(AuthSHA256(Encoding.UTF8.GetBytes(encContent), ak));
if (authHash == null)
{
throw new ArgumentNullException(nameof(authHash));
}
if (realHash.ToLower() != authHash.ToLower())
{
throw new StandardNoteAPIException("Decrypting content failed - hash mismatch");
}
var c = AESEncryption.DecryptCBC256(Convert.FromBase64String(encContent.Substring(3)), ek, null);
return(Encoding.UTF8.GetString(c));
}
/// <summary>
/// 并行下载歌词任务
/// </summary>
/// <param name="down">插件</param>
/// <param name="list">待下载列表</param>
private async void parallelDownLoadLryic(Dictionary <int, MusicInfoModel> list, IPlug_Lrc down)
{
setBottomStatusText(StatusHeadEnum.NORMAL, "正在下载歌词...");
progress_DownLoad.Maximum = list.Count; progress_DownLoad.Value = 0;
await Task.Run(() =>
{
disEnabledButton();
Parallel.ForEach(list, new ParallelOptions()
{
MaxDegreeOfParallelism = SettingManager.SetValue.DownloadThreadNum
}, (item) =>
{
string _path = Path.GetDirectoryName(item.Value.Path) + @"\" + Path.GetFileNameWithoutExtension(item.Value.Path) + ".lrc";
if (SettingManager.SetValue.IsIgnoreExitsFile && File.Exists(_path))
{
listView_MusicInfos.Items[item.Key].SubItems[6].Text = "略过";
}
else
{
byte[] _lrcData;
if (down.DownLoad(item.Value.Artist, item.Value.SongName, out _lrcData, SettingManager.SetValue.IsDownTranslate))
{
string _lrcPath = null;
#region > 输出方式 <
if (SettingManager.SetValue.UserDirectory.Equals(string.Empty)) // 同目录
{
_lrcPath = Path.GetDirectoryName(item.Value.Path) + @"\" + Path.GetFileNameWithoutExtension(item.Value.Path) + ".lrc";
}
else // 自定义目录
{
_lrcPath = Path.Combine(SettingManager.SetValue.UserDirectory, Path.GetFileNameWithoutExtension(item.Value.Path) + ".lrc");
}
#endregion
EncodingConverter _convert = getEncodingConvert();
_lrcData = _convert.ConvertBytes(_lrcData, SettingManager.SetValue.EncodingName);
FileUtils.WriteFile(_lrcPath, _lrcData);
listView_MusicInfos.Items[item.Key].SubItems[6].Text = "成功";
}
else
{
listView_MusicInfos.Items[item.Key].SubItems[6].Text = "失败";
}
}
progress_DownLoad.Value += 1;
});
setBottomStatusText(StatusHeadEnum.SUCCESS, "歌词下载完成！");
enabledButton();
});
}
public static (byte[] mk, byte[] sp, string reqpw) CreateAuthData004(StandardNoteAPI.APIResultAuthParams apiparams, string mail, string uip)
{
var salt = StandardNoteCrypt.SHA256Bytes(string.Join(":", apiparams.identifier, apiparams.pw_nonce)).Take(128 / 8).ToArray();
var derivedKey = ANCrypt.Argon2(Encoding.UTF8.GetBytes(uip), salt, 5, 64 * 1024, 64);
var masterKey = derivedKey.Skip(00).Take(32).ToArray();
var serverPassword = derivedKey.Skip(32).Take(32).ToArray();
var requestPassword = EncodingConverter.ByteToHexBitFiddleLowercase(serverPassword);
return(masterKey, serverPassword, requestPassword);
}
private static string Encrypt003(string string_to_encrypt, Guid uuid, byte[] encryption_key, byte[] auth_key)
{
byte[] IV = new byte[128 / 8];
RNG.GetBytes(IV);
var ciphertext = AESEncryption.EncryptCBC256(Encoding.UTF8.GetBytes(string_to_encrypt), encryption_key, IV);
var string_to_auth = $"003:{uuid:D}:{EncodingConverter.ByteToHexBitFiddleLowercase(IV)}:{Convert.ToBase64String(ciphertext)}";
var auth_hash = EncodingConverter.ByteToHexBitFiddleLowercase(AuthSHA256(Encoding.UTF8.GetBytes(string_to_auth), auth_key));
return($"003:{auth_hash}:{uuid:D}:{EncodingConverter.ByteToHexBitFiddleLowercase(IV)}:{Convert.ToBase64String(ciphertext)}");
}
/// <summary>
/// Transforms a string or integer to an <see cref="System.Text.Encoding"/>.
/// </summary>
/// <param name="engineIntrinsics">Provides access to the APIs for managing the transformation context.</param>
/// <param name="inputData">The parameter argument that is to be transformed.</param>
/// <returns>The transformed object.</returns>
public override object Transform(EngineIntrinsics engineIntrinsics, object inputData)
{
if (null != inputData)
{
var converter = new EncodingConverter();
if (converter.CanConvertFrom(inputData.GetType()))
{
return(converter.ConvertFrom(inputData));
}
}
return(inputData);
}
/// <summary>
/// Transforms a string or integer to an <see cref="System.Text.Encoding"/>.
/// </summary>
/// <param name="engineIntrinsics">Provides access to the APIs for managing the transformation context.</param>
/// <param name="inputData">The parameter argument that is to be transformed.</param>
/// <returns>The transformed object.</returns>
public override object Transform(EngineIntrinsics engineIntrinsics, object inputData)
{
if (null != inputData)
{
var converter = new EncodingConverter();
if (converter.CanConvertFrom(inputData.GetType()))
{
return converter.ConvertFrom(inputData);
}
}
return inputData;
}
public XElement Serialize()
{
var x = new XElement("itemskey",
new XAttribute("ID", UUID.ToString("P")),
new XAttribute("Version", Version),
new XAttribute("AuthKey", EncodingConverter.ByteToHexBitFiddleUppercase(AuthKey ?? new byte[0])),
new XAttribute("Default", IsDefault),
new XAttribute("CreationDate", CreationDate.ToString("yyyy-MM-ddTHH:mm:ss.fffffffzzz", CultureInfo.InvariantCulture)),
new XAttribute("ModificationDate", ModificationDate.ToString("yyyy-MM-ddTHH:mm:ss.fffffffzzz", CultureInfo.InvariantCulture)),
new XAttribute("AppData", RawAppData),
EncodingConverter.ByteToHexBitFiddleUppercase(Key));
return(x);
}
public string ReadString0()
{
int offset = this._offset;
try
{
while (_buffer[_offset++] != 0)
{
}
}
catch {
_offset = _buffer.Length;
}
return(EncodingConverter.GetString(_buffer, offset, this._offset - offset - 1));
}
/// <summary>
/// Do not call this constructor directly. Use <see cref="SessionUtility.GetSessionManager(INotepadsCore)" instead./>
/// </summary>
public SessionManager(INotepadsCore notepadsCore)
{
_notepadsCore = notepadsCore;
_semaphoreSlim = new SemaphoreSlim(1, 1);
_encodingConverter = new EncodingConverter();
_sessionData = new ConcurrentDictionary <Guid, TextEditorSessionData>();
_loaded = false;
foreach (var editor in _notepadsCore.GetAllTextEditors())
{
BindEditorStateChangeEvent(this, editor);
}
_notepadsCore.TextEditorLoaded += BindEditorStateChangeEvent;
_notepadsCore.TextEditorUnloaded += UnbindEditorStateChangeEvent;
}
public static (byte[] pw, byte[] mk, byte[] ak, string reqpw) CreateAuthData002(StandardNoteAPI.APIResultAuthParams apiparams, string uip)
{
if (apiparams.pw_func != StandardNoteAPI.PasswordFunc.pbkdf2)
{
throw new Exception("Unknown pw_func: " + apiparams.pw_func);
}
byte[] bytes = PBKDF2.GenerateDerivedKey(768 / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(apiparams.pw_salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
var pw = bytes.Skip(0 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var mk = bytes.Skip(1 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var ak = bytes.Skip(2 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleUppercase(pw).ToLower();
return(pw, mk, ak, reqpw);
}
public void EncodingConverter_ConvertUtf8StringToIsoBytes_Espanol()
{
var ec = new EncodingConverter();
var result = ec.ConvertUtf8StringToIsoBytes("español.ct");
Assert.AreEqual(_espanolIsoBytes.Length, result.Length);
Assert.AreEqual(_espanolIsoBytes[0], result[0]);
Assert.AreEqual(_espanolIsoBytes[1], result[1]);
Assert.AreEqual(_espanolIsoBytes[2], result[2]);
Assert.AreEqual(_espanolIsoBytes[3], result[3]);
Assert.AreEqual(_espanolIsoBytes[4], result[4]);
Assert.AreEqual(_espanolIsoBytes[5], result[5]);
Assert.AreEqual(_espanolIsoBytes[6], result[6]);
Assert.AreEqual(_espanolIsoBytes[7], result[7]);
Assert.AreEqual(_espanolIsoBytes[8], result[8]);
Assert.AreEqual(_espanolIsoBytes[9], result[9]);
}
private static string DecryptContent001(string encContent, string encItemKey, string authHash, byte[] masterkey)
{
var itemKey = EncodingConverter.StringToByteArrayCaseInsensitive(Encoding.ASCII.GetString(AESEncryption.DecryptCBC256(Convert.FromBase64String(encItemKey), masterkey, new byte[16])));
var ek = itemKey.Take(itemKey.Length / 2).ToArray();
var ak = itemKey.Skip(itemKey.Length / 2).ToArray();
var realHash = EncodingConverter.ByteToHexBitFiddleLowercase(AuthSHA256(Encoding.UTF8.GetBytes(encContent), ak));
if (realHash.ToLower() != authHash.ToLower())
{
throw new StandardNoteAPIException("Decrypting content failed - hash mismatch");
}
var c = AESEncryption.DecryptCBC256(Convert.FromBase64String(encContent.Substring(3)), ek, null);
return(Encoding.UTF8.GetString(c));
}
private static string Decrypt004(string encContent, byte[] key)
{
var split = encContent.Split(':');
var version = split[0];
var nonce = EncodingConverter.StringToByteArrayCaseInsensitive(split[1]);
var ciphertext = Convert.FromBase64String(split[2]);
var authenticated_data = Encoding.UTF8.GetBytes(split[3]);
if (version != "004")
{
throw new StandardNoteAPIException($"Version must be 004 to decrypt 004 encrypted item (duh.)");
}
var plain = ANCrypt.XChaCha20Decrypt(ciphertext, nonce, key, authenticated_data);
return(Encoding.UTF8.GetString(plain));
}
public static StandardFileItemsKey Deserialize(XElement e)
{
var id = XHelper.GetAttributeGuid(e, "ID");
var version = XHelper.GetAttributeString(e, "Version");
var defKey = XHelper.GetAttributeBool(e, "Default");
var cdate = XHelper.GetAttributeDateTimeOffsetOrDefault(e, "CreationDate", DateTimeOffset.MinValue);
var mdate = XHelper.GetAttributeDateTimeOffsetOrDefault(e, "ModificationDate", DateTimeOffset.Now);
var appdata = XHelper.GetAttributeString(e, "AppData");
var key = EncodingConverter.StringToByteArrayCaseInsensitive(e.Value);
var authkey = EncodingConverter.StringToByteArrayCaseInsensitive(XHelper.GetAttributeStringOrDefault(e, "AuthKey", ""));
if (authkey.Length == 0)
{
authkey = null;
}
return(new StandardFileItemsKey(id, version, cdate, mdate, key, authkey, defKey, appdata));
}
public static (byte[] pw, byte[] mk, byte[] ak, string reqpw) CreateAuthData003(StandardNoteAPI.APIResultAuthParams apiparams, string mail, string uip)
{
if (apiparams.pw_cost < 100000)
{
throw new StandardNoteAPIException($"Account pw_cost is too small ({apiparams.pw_cost})");
}
var salt = StandardNoteCrypt.SHA256Hex(string.Join(":", mail, "SF", "003", apiparams.pw_cost.ToString(), apiparams.pw_nonce));
byte[] bytes = PBKDF2.GenerateDerivedKey(768 / 8, Encoding.UTF8.GetBytes(uip), Encoding.UTF8.GetBytes(salt), apiparams.pw_cost, PBKDF2.HMACType.SHA512);
var pw = bytes.Skip(0 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var mk = bytes.Skip(1 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var ak = bytes.Skip(2 * (bytes.Length / 3)).Take(bytes.Length / 3).ToArray();
var reqpw = EncodingConverter.ByteToHexBitFiddleUppercase(pw).ToLower();
return(pw, mk, ak, reqpw);
}
