public static MemoryStream CreateKeyStream(FilePasswordPair key)
{
FileStream fileStream = new FileStream(key.fileName, FileMode.Open);
MemoryStream resultStream = new MemoryStream();
int passwordIndex = 0;
int currentByte = 0;
while ((currentByte = fileStream.ReadByte()) >= 0)
{
//combine the key-byte with the corresponding password-byte
currentByte = currentByte ^ key.password[passwordIndex];
//add the result to the key stream
resultStream.WriteByte((byte)currentByte);
//proceed to the next letter or repeat the password
passwordIndex++;
if (passwordIndex == key.password.Length)
{
passwordIndex = 0;
}
}
fileStream.Close();
resultStream.Seek(0, SeekOrigin.Begin);
return(resultStream);
}
public FilePasswordPair[] GetKeys()
{
FilePasswordPair[] result = new FilePasswordPair[lvKeys.Items.Count];
ListViewItem item;
for (int n = 0; n < lvKeys.Items.Count; n++)
{
item = lvKeys.Items[n];
result[n] = (FilePasswordPair)item.Tag;
}
return(result);
}