/// <summary>
/// Parses a password history from the database serialized format which is:
/// smmnnddddddddllll[passsword] ...
/// 's' is a decimal status.
/// 'mm' is a hex max number of password history entries
/// 'nn' is a hex number of passwords in this list
/// The following is repeated 'nn' times:
/// 'dddddddd' is a hex representation of 32-bit unix time when this password was changed.
/// 'llll' is a hex representation of 16-bit length of the password that follows.
/// [password] is the string of the password.
/// </summary>
/// <param name="serialized">The serialized string</param>
/// <returns>The decoded password history</returns>
public static PasswordSafePasswordHistory Parse(
string serialized)
{
if (serialized == null)
{
throw new ArgumentNullException("serialized");
}
var history = new PasswordSafePasswordHistory();
if (serialized.Length < 5)
{
return(history);
}
history.Status = byte.Parse(serialized.Substring(0, 1), NumberStyles.Integer, CultureInfo.InvariantCulture);
history.MaxHistory = byte.Parse(serialized.Substring(1, 2), NumberStyles.HexNumber,
CultureInfo.InvariantCulture);
var numberOfPasswords = int.Parse(serialized.Substring(3, 2), NumberStyles.HexNumber,
CultureInfo.InvariantCulture);
var currentIndex = 5;
for (var i = 0; i < numberOfPasswords; ++i)
{
var unixTimeChanged = int.Parse(serialized.Substring(currentIndex, 8), NumberStyles.HexNumber,
CultureInfo.InvariantCulture);
var passwordChangedUtc = PasswordSafeUtility.GetUtcFromUnixTime(unixTimeChanged);
currentIndex += 8;
var passwordLength = int.Parse(serialized.Substring(currentIndex, 4), NumberStyles.HexNumber,
CultureInfo.InvariantCulture);
currentIndex += 4;
var password = serialized.Substring(currentIndex, passwordLength);
currentIndex += passwordLength;
history.PasswordHistoryAdd(new PasswordSafePassword(password, passwordChangedUtc));
}
return(history);
}
/// <summary>
/// Reads one data record.
/// </summary>
/// <returns>The record</returns>
private PasswordSafeRecord ReadRecord()
{
var fields = ReadGenericRecord();
if (fields == null)
{
return(null);
}
var record = new PasswordSafeRecord();
var endSeen = false;
foreach (var field in fields)
{
if (endSeen)
{
throw new InvalidDataException("The END filed must be last in the header");
}
var data = field.DataBuffer();
switch ((PasswordSafeRecordTypeCode)field.Type)
{
case PasswordSafeRecordTypeCode.NAME:
throw new InvalidDataException("The NAME field type is not allowed here.");
case PasswordSafeRecordTypeCode.UUID:
if (data.Length != 16)
{
throw new InvalidDataException("UUID field length wrong");
}
record.Uuid = new Guid(data);
break;
case PasswordSafeRecordTypeCode.GROUP:
record.Group =
Encoding.UTF8.GetString(data, 0, data.Length); //.UTF8.GetString(data,0,data.Length);
break;
case PasswordSafeRecordTypeCode.TITLE:
record.Title = Encoding.UTF8.GetString(data, 0, data.Length);
break;
case PasswordSafeRecordTypeCode.USER:
record.User = Encoding.UTF8.GetString(data, 0, data.Length);
break;
case PasswordSafeRecordTypeCode.NOTES:
record.Notes = Encoding.UTF8.GetString(data, 0, data.Length);
break;
case PasswordSafeRecordTypeCode.PASSWORD:
record.PasswordValue = Encoding.UTF8.GetString(data, 0, data.Length);
break;
case PasswordSafeRecordTypeCode.CTIME:
record.TimeRecordCreatedUtc = GetUtcFromUnixTime(data);
break;
case PasswordSafeRecordTypeCode.PMTIME:
record.TimePasswordModifiedUtc = GetUtcFromUnixTime(data);
break;
case PasswordSafeRecordTypeCode.ATIME:
record.TimeRecordAccessedUtc = GetUtcFromUnixTime(data);
break;
case PasswordSafeRecordTypeCode.LTIME:
record.TimePasswordExpiresUtc = GetUtcFromUnixTime(data);
break;
case PasswordSafeRecordTypeCode.POLICY:
throw new InvalidDataException("The POLICY field type is not allowed here.");
case PasswordSafeRecordTypeCode.RMTIME:
record.TimeRecordModifiedUtc = GetUtcFromUnixTime(data);
break;
case PasswordSafeRecordTypeCode.URL:
record.ResourceLocator = Encoding.UTF8.GetString(data, 0, data.Length);
break;
case PasswordSafeRecordTypeCode.AUTOTYPE:
record.AutoType = Encoding.UTF8.GetString(data, 0, data.Length);
break;
case PasswordSafeRecordTypeCode.PWHIST:
var serializedHistory = Encoding.UTF8.GetString(data, 0, data.Length);
record.PasswordHistory = PasswordSafePasswordHistory.Parse(serializedHistory);
break;
case PasswordSafeRecordTypeCode.END:
endSeen = true;
break;
default:
record.UnknownFieldEntriesAdd(field);
break;
}
}
return(record);
}
