using Renci.SshNet.Security.Org.BouncyCastle.Math; using Renci.SshNet.Security.Org.BouncyCastle.Security; using System; namespace Renci.SshNet.Security.Org.BouncyCastle.Utilities { internal abstract class BigIntegers { private const int MaxIterations = 1000; public static byte[] AsUnsignedByteArray(BigInteger n) { return n.ToByteArrayUnsigned(); } public static byte[] AsUnsignedByteArray(int length, BigInteger n) { byte[] array = n.ToByteArrayUnsigned(); if (array.Length > length) throw new ArgumentException("standard length exceeded", "n"); if (array.Length == length) return array; byte[] array2 = new byte[length]; Array.Copy(array, 0, array2, array2.Length - array.Length, array.Length); return array2; } public static BigInteger CreateRandomInRange(BigInteger min, BigInteger max, SecureRandom random) { int num = min.CompareTo(max); if (num >= 0) { if (num > 0) throw new ArgumentException("'min' may not be greater than 'max'"); return min; } if (min.BitLength > max.BitLength / 2) return CreateRandomInRange(BigInteger.Zero, max.Subtract(min), random).Add(min); for (int i = 0; i < 1000; i++) { BigInteger bigInteger = new BigInteger(max.BitLength, random); if (bigInteger.CompareTo(min) >= 0 && bigInteger.CompareTo(max) <= 0) return bigInteger; } return new BigInteger(max.Subtract(min).BitLength - 1, random).Add(min); } public static int GetUnsignedByteLength(BigInteger n) { return (n.BitLength + 7) / 8; } } }