Sha256: f7d8ac91d5eb423170922f34aa191fce7f1587bf04cec25c77916677603aaba5
Contents?: true
Size: 1.54 KB
Versions: 208
Compression:
Stored size: 1.54 KB
Contents
using System;
using System.Collections.Generic;
using System.Linq;
public class Crypto
{
public Crypto(string input)
{
this.NormalizePlaintext = GetNormalizedPlaintext(input);
this.Size = this.CalculateSize();
}
public int Size { get; private set; }
public string NormalizePlaintext { get; private set; }
public string NormalizeCiphertext()
{
return string.Join(" ", Transpose(this.PlaintextSegments()));
}
public string Ciphertext()
{
return string.Join("", Transpose(this.PlaintextSegments()));
}
public IEnumerable<string> PlaintextSegments()
{
return Chunks(this.NormalizePlaintext, this.Size);
}
private int CalculateSize()
{
return (int) Math.Ceiling(Math.Sqrt(this.NormalizePlaintext.Length));
}
private static string GetNormalizedPlaintext(string input)
{
return new string(input.ToLowerInvariant().Where(char.IsLetterOrDigit).ToArray());
}
private static IEnumerable<string> Chunks(string str, int chunkSize)
{
return Enumerable.Range(0, (int)Math.Ceiling(str.Length / (double)chunkSize))
.Select(i => str.Substring(i * chunkSize, Math.Min(str.Length - i * chunkSize, chunkSize)));
}
private static IEnumerable<string> Transpose(IEnumerable<string> input)
{
return input.SelectMany(s => s.Select((c, i) => Tuple.Create(i, c)))
.GroupBy(x => x.Item1)
.Select(g => new string(g.Select(t => t.Item2).ToArray()));
}
}
Version data entries
208 entries across 208 versions & 1 rubygems