static public List <Letter> getHashes(string sInput, byte[] salt)
{
List <Letter> sArrL = new List <Letter>();
int sLen = sInput.Length;
string ltr = "";
string hash = "";
string iHsh = "";
string alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
Letter ltrHash = new Letter("", "");
Random rand = new Random();
int rnd = 0;
for (int i = 0; i < sLen; i++)
{
rnd = rand.Next(0, i + 1);
ltr = sInput[i].ToString().ToUpper();
hash = ltr; // Hash.GetHash(ltr, Hash.HashType.MD5);
iHsh = Hash.GetHMACSHA1(i.ToString(), salt).Substring(0, 8); //i.ToString();
ltrHash = new Letter(iHsh, hash);
sArrL.Insert(rnd, ltrHash);
}
int l;
if (sLen < 26)
{
l = 26 - sLen;
for (int x = 0; x < l; x++)
{
int r = rand.Next(0, sLen);
int ra = rand.Next(0, 25);
var rLtr = alpha[ra].ToString().ToUpper();
var rSlt = Salt.RandomSalt();
var rHash = rLtr; //Hash.GetHash(rLtr, Hash.HashType.MD5);
var rXHsh = Hash.GetHMACSHA1(r.ToString(), rSlt).Substring(0, 8); //r.ToString();
var rLtrHsh = new Letter(rXHsh, rHash);
sArrL.Insert(r, rLtrHsh);
}
}
return(sArrL);
}
static void Main(string[] args)
{
//name in data source 1
var str_1 = "MARTHA";
//name in data source 2
var str_2 = "MARHTA";
//key sent to each data source
var salt = Salt.RandomSalt(); //new byte[4] {1, 2, 3, 4};
Stopwatch sw = new Stopwatch();
sw = Stopwatch.StartNew();
//get hashed list array of letter objects
//letter object includes letter and position
//letter objects are randomly inserted in the list array
//random letters for names < 26 characters are randomly inserted in the list array
var aList = StringHasher.getHashes(str_1, salt);
var bList = StringHasher.getHashes(str_2, salt);
var fstHash = sw.Elapsed;
sw = Stopwatch.StartNew();
//random letter insertions are eliminated
//letters are arranged according to position property of letter object
var a_rlLtrs = Decode.CleanList(aList, salt);
var b_rlLtrs = Decode.CleanList(bList, salt);
var scdHash = sw.Elapsed;
sw = Stopwatch.StartNew();
//names are compared using Jaro Winkler
SecureJW sJW = new SecureJW(.7, 4);
double match = sJW.Match(a_rlLtrs, b_rlLtrs);
var jW = sw.Elapsed;
//JSON-format serialized output for transport to Shaker
JavaScriptSerializer jss = new JavaScriptSerializer();
string ser = jss.Serialize(aList);
Console.WriteLine(ser);
Console.WriteLine("--------------------------------------------");
foreach (Letter l in aList)
{
Console.WriteLine(l.Pos.ToString() + ", " + l.Ltr);
}
Console.WriteLine("--------------------------------------------");
foreach (string r in a_rlLtrs)
{
Console.WriteLine(r.ToString());
}
Console.WriteLine("--------------------------------------------");
foreach (string r in b_rlLtrs)
{
Console.WriteLine(r.ToString());
}
Console.WriteLine("--------------------------------------------");
Console.WriteLine("Match: " + match);
Console.WriteLine(fstHash);
Console.WriteLine(scdHash);
Console.WriteLine(jW);
}
