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using Org.BouncyCastle.Utilities.IO.Compression;
using System.Collections.Generic;
using System.IO;
namespace Org.BouncyCastle.Pqc.Crypto.Picnic
{
internal class LowmcConstantsL5
: LowmcConstants
{
public LowmcConstantsL5()
{
_matrixToHex = new Dictionary<string, string>();
Stream input = typeof(LowmcConstants).Assembly
.GetManifestResourceStream("Org.BouncyCastle.pqc.crypto.picnic.lowmcL5.bz2");
input = Bzip2.DecompressInput(input);
using (StreamReader sr = new StreamReader(input))
{
// load a properties file
string line = sr.ReadLine();
string matrix, hexString;
while (line != null)
{
string header = line;
if (header != "")
{
header = header.Replace(",", "");
int index = header.IndexOf('=');
matrix = header.Substring(0, index).Trim();
hexString = header.Substring(index + 1).Trim();
_matrixToHex.Add(matrix, hexString);
}
line = sr.ReadLine();
}
}
// Parameters for security level L5
// Block/key size: 256
// Rounds: 38
linearMatrices = ReadFromProperty(_matrixToHex["linearMatrices"], 311296);
roundConstants = ReadFromProperty(_matrixToHex["roundConstants"], 1216);
keyMatrices = ReadFromProperty(_matrixToHex["keyMatrices"], 319488);
_LMatrix = new KMatrices(38, 256, 8, linearMatrices);
_KMatrix = new KMatrices(39, 256, 8, keyMatrices);
RConstants = new KMatrices(38, 1, 8, roundConstants);
// Parameters for security level L5, full nonlinear layer
// Block/key size: 255
// S-boxes: 85
// Rounds: 4
linearMatrices_full = ReadFromProperty(_matrixToHex["linearMatrices_full"], 32768);
linearMatrices_inv = ReadFromProperty(_matrixToHex["linearMatrices_inv"], 32768);
roundConstants_full = ReadFromProperty(_matrixToHex["roundConstants_full"], 128);
keyMatrices_full = ReadFromProperty(_matrixToHex["keyMatrices_full"], 40960);
keyMatrices_inv = ReadFromProperty(_matrixToHex["keyMatrices_inv"], 8160);
LMatrix_full = new KMatrices(4, 255, 8, linearMatrices_full);
LMatrix_inv = new KMatrices(4, 255, 8, linearMatrices_inv);
KMatrix_full = new KMatrices(5, 255, 8, keyMatrices_full);
KMatrix_inv = new KMatrices(1, 255, 8, keyMatrices_inv);
RConstants_full = new KMatrices(4, 1, 8, roundConstants_full);
}
}
}
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