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C# BigInteger.RabinMillerTest方法代码示例

本文整理汇总了C#中Org.BouncyCastle.Math.BigInteger.RabinMillerTest方法的典型用法代码示例。如果您正苦于以下问题:C# BigInteger.RabinMillerTest方法的具体用法?C# BigInteger.RabinMillerTest怎么用?C# BigInteger.RabinMillerTest使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Org.BouncyCastle.Math.BigInteger的用法示例。


在下文中一共展示了BigInteger.RabinMillerTest方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: GenerateSafePrimes

        /*
         * Finds a pair of prime BigInteger's {p, q: p = 2q + 1}
         * 
         * (see: Handbook of Applied Cryptography 4.86)
         */
        internal static BigInteger[] GenerateSafePrimes(int size, int certainty, SecureRandom random)
        {
            BigInteger p, q;
            int qLength = size - 1;
            int minWeight = size >> 2;

            if (size <= 32)
            {
                for (;;)
                {
                    q = new BigInteger(qLength, 2, random);

                    p = q.ShiftLeft(1).Add(BigInteger.One);

                    if (!p.IsProbablePrime(certainty))
                        continue;

                    if (certainty > 2 && !q.IsProbablePrime(certainty - 2))
                        continue;

                    break;
                }
            }
            else
            {
                // Note: Modified from Java version for speed
                for (;;)
                {
                    q = new BigInteger(qLength, 0, random);

                retry:
                    for (int i = 0; i < primeLists.Length; ++i)
                    {
                        int test = q.Remainder(BigPrimeProducts[i]).IntValue;

                        if (i == 0)
                        {
                            int rem3 = test % 3;
                            if (rem3 != 2)
                            {
                                int diff = 2 * rem3 + 2;
                                q = q.Add(BigInteger.ValueOf(diff));
                                test = (test + diff) % primeProducts[i];
                            }
                        }

                        int[] primeList = primeLists[i];
                        for (int j = 0; j < primeList.Length; ++j)
                        {
                            int prime = primeList[j];
                            int qRem = test % prime;
                            if (qRem == 0 || qRem == (prime >> 1))
                            {
                                q = q.Add(Six);
                                goto retry;
                            }
                        }
                    }

                    if (q.BitLength != qLength)
                        continue;

                    if (!q.RabinMillerTest(2, random))
                        continue;

                    p = q.ShiftLeft(1).Add(BigInteger.One);

                    if (!p.RabinMillerTest(certainty, random))
                        continue;

                    if (certainty > 2 && !q.RabinMillerTest(certainty - 2, random))
                        continue;

                    /*
                     * Require a minimum weight of the NAF representation, since low-weight primes may be
                     * weak against a version of the number-field-sieve for the discrete-logarithm-problem.
                     * 
                     * See "The number field sieve for integers of low weight", Oliver Schirokauer.
                     */
                    if (WNafUtilities.GetNafWeight(p) < minWeight)
                        continue;

                    break;
                }
            }

            return new BigInteger[] { p, q };
        }
开发者ID:ubberkid,项目名称:PeerATT,代码行数:93,代码来源:DHParametersHelper.cs

示例2: GenerateSafePrimes

        /*
         * Finds a pair of prime BigInteger's {p, q: p = 2q + 1}
         * 
         * (see: Handbook of Applied Cryptography 4.86)
         */
        internal static BigInteger[] GenerateSafePrimes(int size, int certainty, SecureRandom random)
		{
			BigInteger p, q;
			int qLength = size - 1;

			if (size <= 32)
			{
				for (;;)
				{
					q = new BigInteger(qLength, 2, random);

					p = q.ShiftLeft(1).Add(BigInteger.One);

					if (p.IsProbablePrime(certainty)
						&& (certainty <= 2 || q.IsProbablePrime(certainty)))
							break;
				}
			}
			else
			{
				// Note: Modified from Java version for speed
				for (;;)
				{
					q = new BigInteger(qLength, 0, random);

				retry:
					for (int i = 0; i < primeLists.Length; ++i)
					{
						int test = q.Remainder(BigPrimeProducts[i]).IntValue;

                        if (i == 0)
						{
							int rem3 = test % 3;
							if (rem3 != 2)
							{
								int diff = 2 * rem3 + 2;
								q = q.Add(BigInteger.ValueOf(diff));
								test = (test + diff) % primeProducts[i];
							}
						}

						int[] primeList = primeLists[i];
						for (int j = 0; j < primeList.Length; ++j)
						{
							int prime = primeList[j];
							int qRem = test % prime;
							if (qRem == 0 || qRem == (prime >> 1))
							{
								q = q.Add(Six);
								goto retry;
							}
						}
					}


					if (q.BitLength != qLength)
						continue;

					if (!q.RabinMillerTest(2, random))
						continue;

					p = q.ShiftLeft(1).Add(BigInteger.One);

					if (p.RabinMillerTest(certainty, random)
						&& (certainty <= 2 || q.RabinMillerTest(certainty - 2, random)))
						break;
				}
			}

			return new BigInteger[] { p, q };
		}
开发者ID:Niladri24dutta,项目名称:itextsharp,代码行数:76,代码来源:DHParametersHelper.cs


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