c# develops WeChat to implement jssdk signature generation
Mar 24, 2017 pm 02:18 PM
這篇文章講解的的比較詳細,而且算法準確,但是這篇文章有幾個錯誤的地方需要注意;
url必須動態(tài)生成
url不能寫死,否則就算結果和官方檢測的一致,也只會是無效的
string url = Request.Url.ToString();
noncestr必須動態(tài)生成
noncestr也是動態(tài)獲取的,不能寫死
///<summary>
///生成隨機字符串
///</summary>
///<param name="length">目標字符串的長度</param>
///<param name="useNum">是否包含數(shù)字，1=包含，默認為包含</param>
///<param name="useLow">是否包含小寫字母，1=包含，默認為包含</param>
///<param name="useUpp">是否包含大寫字母，1=包含，默認為包含</param>
///<param name="useSpe">是否包含特殊字符，1=包含，默認為不包含</param>
///<param name="custom">要包含的自定義字符，直接輸入要包含的字符列表</param>
///<returns>指定長度的隨機字符串</returns>
public static string GetRandomString(int length, bool useNum, bool useLow, bool useUpp, bool useSpe, string custom)
{
byte[] b = new byte[4];
new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(b);
Random r = new Random(BitConverter.ToInt32(b, 0));
string s = null, str = custom;
if (useNum == true) { str += "0123456789"; }
if (useLow == true) { str += "abcdefghijklmnopqrstuvwxyz"; }
if (useUpp == true) { str += "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; }
if (useSpe == true) { str += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"; }
for (int i = 0; i < length; i++)
{
s += str.Substring(r.Next(0, str.Length - 1), 1);
}
return s;
}官方給取的例子長度為16,含大小寫和數(shù)字,沒有特殊字符串
即
var noncestr = GetRandomString(16, true, true, true, false,"");
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