/// <summary>
/// Find dictionary matches in <paramref name="password"/>.
/// </summary>
/// <param name="password">The password to check.</param>
/// <returns>An enumerable of dictionary matches.</returns>
public virtual IEnumerable <Match> MatchPassword(string password)
{
var passwordLower = password.ToLower();
var length = passwordLower.Length;
var matches = new List <Match>();
for (var i = 0; i < length; i++)
{
for (var j = i; j < length; j++)
{
var passwordSub = passwordLower.Substring(i, j - i + 1);
if (rankedDictionary.ContainsKey(passwordSub))
{
var match = new DictionaryMatch
{
i = i,
j = j,
Token = password.Substring(i, j - i + 1),
MatchedWord = passwordSub,
Rank = rankedDictionary[passwordSub],
DictionaryName = dictionaryName,
Reversed = false,
L33t = false,
};
matches.Add(match);
}
}
}
return(matches.OrderBy(m => m.i).ThenBy(m => m.j));
}
private void CalculateEntropyForMatch(DictionaryMatch match)
{
match.BaseEntropy = Math.Log(match.Rank, 2);
match.UppercaseEntropy = PasswordScoring.CalculateUppercaseEntropy(match.Token);
match.Entropy = match.BaseEntropy + match.UppercaseEntropy;
}
/// <summary>
/// Create a new l33t match from a dictionary match
/// </summary>
/// <param name="dm">The dictionary match to initialise the l33t match from</param>
public L33tDictionaryMatch(DictionaryMatch dm)
{
this.BaseEntropy = dm.BaseEntropy;
this.Cardinality = dm.Cardinality;
this.DictionaryName = dm.DictionaryName;
this.Entropy = dm.Entropy;
this.Begin = dm.Begin;
this.End = dm.End;
this.MatchedWord = dm.MatchedWord;
this.Pattern = dm.Pattern;
this.Rank = dm.Rank;
this.Token = dm.Token;
this.UppercaseEntropy = dm.UppercaseEntropy;
Subs = new Dictionary <char, char>();
}
/// <summary>
/// Create a new l33t match from a dictionary match
/// </summary>
/// <param name="dm">The dictionary match to initialise the l33t match from</param>
public L33tDictionaryMatch(DictionaryMatch dm)
{
this.BaseEntropy = dm.BaseEntropy;
this.Cardinality = dm.Cardinality;
this.DictionaryName = dm.DictionaryName;
this.Entropy = dm.Entropy;
this.i = dm.i;
this.j = dm.j;
this.MatchedWord = dm.MatchedWord;
this.Pattern = dm.Pattern;
this.Rank = dm.Rank;
this.Token = dm.Token;
this.UppercaseEntropy = dm.UppercaseEntropy;
Subs = new Dictionary<char, char>();
}
/// <summary>
/// Create a new l33t match from a dictionary match
/// </summary>
/// <param name="dm">The dictionary match to initialise the l33t match from</param>
public L33tDictionaryMatch(DictionaryMatch dm)
{
BaseEntropy = dm.BaseEntropy;
Cardinality = dm.Cardinality;
DictionaryName = dm.DictionaryName;
Entropy = dm.Entropy;
i = dm.i;
j = dm.j;
MatchedWord = dm.MatchedWord;
Pattern = dm.Pattern;
Rank = dm.Rank;
Token = dm.Token;
UppercaseEntropy = dm.UppercaseEntropy;
Subs = new Dictionary <char, char>();
}
private void CalculateEntropyForMatch(DictionaryMatch match)
{
match.BaseEntropy = Math.Log(match.Rank, 2);
match.UppercaseEntropy = PasswordScoring.CalculateUppercaseEntropy(match.Token);
match.Entropy = match.BaseEntropy + match.UppercaseEntropy;
}