using Org.BouncyCastle.Utilities; using Org.BouncyCastle.Utilities.IO; using System; using System.IO; namespace Org.BouncyCastle.Pqc.Crypto.Lms { public class LmsSignature : IEncodable { private readonly int m_q; private readonly LMOtsSignature m_otsSignature; private readonly LMSigParameters m_parameters; private readonly byte[][] m_y; public LMOtsSignature OtsSignature => m_otsSignature; public int Q => m_q; public LMSigParameters SigParameters => m_parameters; public byte[][] Y => m_y; public LmsSignature(int q, LMOtsSignature otsSignature, LMSigParameters parameter, byte[][] y) { m_q = q; m_otsSignature = otsSignature; m_parameters = parameter; m_y = y; } public static LmsSignature GetInstance(object src) { LmsSignature lmsSignature = src as LmsSignature; if (lmsSignature != null) return lmsSignature; BinaryReader binaryReader = src as BinaryReader; if (binaryReader != null) return Parse(binaryReader); Stream stream = src as Stream; if (stream != null) return BinaryReaders.Parse(Parse, stream, true); byte[] array = src as byte[]; if (array != null) return BinaryReaders.Parse(Parse, new MemoryStream(array, false), false); throw new ArgumentException($"""{src}"); } internal static LmsSignature Parse(BinaryReader binaryReader) { int q = BinaryReaders.ReadInt32BigEndian(binaryReader); LMOtsSignature otsSignature = LMOtsSignature.Parse(binaryReader); LMSigParameters parametersByID = LMSigParameters.GetParametersByID(BinaryReaders.ReadInt32BigEndian(binaryReader)); byte[][] array = new byte[parametersByID.H][]; for (int i = 0; i < array.Length; i++) { array[i] = new byte[parametersByID.M]; binaryReader.Read(array[i], 0, array[i].Length); } return new LmsSignature(q, otsSignature, parametersByID, array); } public override bool Equals(object o) { if (this == o) return true; LmsSignature lmsSignature = o as LmsSignature; if (lmsSignature != null && m_q == lmsSignature.m_q && object.Equals(m_otsSignature, lmsSignature.m_otsSignature) && object.Equals(m_parameters, lmsSignature.m_parameters)) return DeepEquals(m_y, lmsSignature.m_y); return false; } public override int GetHashCode() { int q = m_q; q = 31 * q + Objects.GetHashCode(m_otsSignature); q = 31 * q + Objects.GetHashCode(m_parameters); return 31 * q + DeepGetHashCode(m_y); } public byte[] GetEncoded() { return Composer.Compose().U32Str(m_q).Bytes(m_otsSignature.GetEncoded()) .U32Str(m_parameters.ID) .Bytes2(m_y) .Build(); } private static bool DeepEquals(byte[][] a, byte[][] b) { if (a == b) return true; int num = a.Length; if (num != b.Length) return false; for (int i = 0; i < num; i++) { if (!Arrays.AreEqual(a[i], b[i])) return false; } return true; } private static int DeepGetHashCode(byte[][] a) { if (a == null) return 0; int num = a.Length; int num2 = num + 1; for (int i = 0; i < num; i++) { num2 *= 257; num2 ^= Arrays.GetHashCode(a[i]); } return num2; } } }