using Org.BouncyCastle.Crypto.Utilities; using Org.BouncyCastle.Utilities.Encoders; using System.Collections.Generic; namespace Org.BouncyCastle.Pqc.Crypto.Picnic { internal abstract class LowmcConstants { internal Dictionary<string, string> _matrixToHex; internal uint[] linearMatrices; internal uint[] roundConstants; internal uint[] keyMatrices; internal KMatrices _LMatrix; internal KMatrices _KMatrix; internal KMatrices RConstants; internal uint[] linearMatrices_full; internal uint[] keyMatrices_full; internal uint[] keyMatrices_inv; internal uint[] linearMatrices_inv; internal uint[] roundConstants_full; internal KMatrices LMatrix_full; internal KMatrices LMatrix_inv; internal KMatrices KMatrix_full; internal KMatrices KMatrix_inv; internal KMatrices RConstants_full; internal static uint[] ReadFromProperty(string s, int intSize) { byte[] array = Hex.Decode(s); uint[] array2 = new uint[intSize]; for (int i = 0; i < array.Length / 4; i++) { array2[i] = Pack.LE_To_UInt32(array, i * 4); } return array2; } private KMatricesWithPointer GET_MAT(KMatrices m, int r) { KMatricesWithPointer kMatricesWithPointer = new KMatricesWithPointer(m); kMatricesWithPointer.SetMatrixPointer(r * kMatricesWithPointer.GetSize()); return kMatricesWithPointer; } internal KMatricesWithPointer LMatrix(PicnicEngine engine, int round) { if (engine.stateSizeBits == 128) return GET_MAT(_LMatrix, round); if (engine.stateSizeBits == 129) return GET_MAT(LMatrix_full, round); if (engine.stateSizeBits == 192) { if (engine.numRounds == 4) return GET_MAT(LMatrix_full, round); return GET_MAT(_LMatrix, round); } if (engine.stateSizeBits == 255) return GET_MAT(LMatrix_full, round); if (engine.stateSizeBits == 256) return GET_MAT(_LMatrix, round); return null; } internal KMatricesWithPointer LMatrixInv(PicnicEngine engine, int round) { if (engine.stateSizeBits == 129) return GET_MAT(LMatrix_inv, round); if (engine.stateSizeBits == 192 && engine.numRounds == 4) return GET_MAT(LMatrix_inv, round); if (engine.stateSizeBits == 255) return GET_MAT(LMatrix_inv, round); return null; } internal KMatricesWithPointer KMatrix(PicnicEngine engine, int round) { if (engine.stateSizeBits == 128) return GET_MAT(_KMatrix, round); if (engine.stateSizeBits == 129) return GET_MAT(KMatrix_full, round); if (engine.stateSizeBits == 192) { if (engine.numRounds == 4) return GET_MAT(KMatrix_full, round); return GET_MAT(_KMatrix, round); } if (engine.stateSizeBits == 255) return GET_MAT(KMatrix_full, round); if (engine.stateSizeBits == 256) return GET_MAT(_KMatrix, round); return null; } internal KMatricesWithPointer KMatrixInv(PicnicEngine engine, int round) { if (engine.stateSizeBits == 129) return GET_MAT(KMatrix_inv, round); if (engine.stateSizeBits == 192 && engine.numRounds == 4) return GET_MAT(KMatrix_inv, round); if (engine.stateSizeBits == 255) return GET_MAT(KMatrix_inv, round); return null; } internal KMatricesWithPointer RConstant(PicnicEngine engine, int round) { if (engine.stateSizeBits == 128) return GET_MAT(RConstants, round); if (engine.stateSizeBits == 129) return GET_MAT(RConstants_full, round); if (engine.stateSizeBits == 192) { if (engine.numRounds == 4) return GET_MAT(RConstants_full, round); return GET_MAT(RConstants, round); } if (engine.stateSizeBits == 255) return GET_MAT(RConstants_full, round); if (engine.stateSizeBits == 256) return GET_MAT(RConstants, round); return null; } } }