/// <summary>
/// Generate a mnemonic
/// </summary>
/// <param name="wordList"></param>
/// <param name="entropy"></param>
public Mnemonic(Wordlist wordList, byte[] entropy = null)
{
wordList = wordList ?? Wordlist.English;
_WordList = wordList;
if (entropy == null)
{
entropy = RandomUtils.GetBytes(32);
}
var i = Array.IndexOf(entArray, entropy.Length * 8);
if (i == -1)
{
throw new ArgumentException("The length for entropy should be : " + String.Join(",", entArray), "entropy");
}
int cs = csArray[i];
byte[] checksum = Hashes.SHA256(entropy);
BitWriter entcsResult = new BitWriter();
entcsResult.Write(entropy);
entcsResult.Write(checksum, cs);
_Indices = entcsResult.ToIntegers();
_Words = _WordList.GetWords(_Indices);
_Mnemonic = _WordList.GetSentence(_Indices);
}
public static async Task <Wordlist> LoadWordList(string name)
{
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
Wordlist result = null;
lock (_LoadedLists)
{
_LoadedLists.TryGetValue(name, out result);
}
if (result != null)
{
return(await Task.FromResult <Wordlist>(result).ConfigureAwait(false));
}
if (WordlistSource == null)
{
throw new InvalidOperationException("Wordlist.WordlistSource is not set, impossible to fetch word list.");
}
result = await WordlistSource.Load(name).ConfigureAwait(false);
if (result != null)
{
lock (_LoadedLists)
{
_LoadedLists.AddOrReplace(name, result);
}
}
return(result);
}
public Mnemonic(string mnemonic, Wordlist wordlist = null)
{
if (mnemonic == null)
{
throw new ArgumentNullException(nameof(mnemonic));
}
_Mnemonic = mnemonic.Trim();
if (wordlist == null)
{
wordlist = Wordlist.AutoDetect(mnemonic) ?? Wordlist.English;
}
var words = mnemonic.Split(new char[] { ' ', ' ' }, StringSplitOptions.RemoveEmptyEntries);
//if the sentence is not at least 12 characters or cleanly divisible by 3, it is bad!
if (!CorrectWordCount(words.Length))
{
throw new FormatException("Word count should be 12,15,18,21 or 24");
}
_Words = words;
_WordList = wordlist;
_Indices = wordlist.ToIndices(words);
}
public Mnemonic(Wordlist wordList, WordCount wordCount)
: this(wordList, GenerateEntropy(wordCount))
{
}