[基础科学]如何利用C产生随机密码字符串.docVIP

using System; using System.Security.Cryptography; using System.Text; namespace Utility { public class PasswordGenerator { public PasswordGenerator() { this.Minimum = DefaultMinimum; this.Maximum = DefaultMaximum; this.ConsecutiveCharacters = false; this.RepeatCharacters = true; this.ExcludeSymbols = false; this.Exclusions = null; rng = new RNGCryptoServiceProvider(); } protected int GetCryptographicRandomNumber(int lBound, int uBound) { // ?ù?¨ lBound = 0 lBound uBound // ·μ??ò??? int = lBound and uBound uint urndnum; byte[] rndnum = new Byte[4]; if (lBound == uBound-1) { // ??óDiBound·μ??μ??é?? return lBound; } uint xcludeRndBase = (uint.MaxValue - (uint.MaxValue%(uint)(uBound-lBound))); do { rng.GetBytes(rndnum); urndnum = System.BitConverter.ToUInt32(rndnum,0); } while (urndnum = xcludeRndBase); return (int)(urndnum % (uBound-lBound)) + lBound; } protected char GetRandomCharacter() { int upperBound = pwdCharArray.GetUpperBound(0); if ( true == this.ExcludeSymbols ) { upperBound = PasswordGenerator.UBoundDigit; } int randomCharPosition = GetCryptographicRandomNumber(pwdCharArray.GetLowerBound(0), upperBound); char randomChar = pwdCharArray[randomCharPosition]; return randomChar; } public string Generate() { // μ?μ?minimum oí maximum ???????úμ?3¤?è int pwdLength = GetCryptographicRandomNumber(this.