c# .net sha1加密的几种形式,经过微信签名测试有效

推荐使用（经过微信签名测试有效）

/// <summary>
/// Sha1签名
/// </summary>
/// <param name="str">内容</param>
/// <param name="encoding">编码</param>
/// <returns></returns>
private static string Sha1Signature(string str, Encoding encoding=null)
{if (encoding == null) encoding = Encoding.UTF8;var buffer = encoding.GetBytes(str);var data = SHA1.Create().ComputeHash(buffer);StringBuilder sub = new StringBuilder();foreach (var t in data){sub.Append(t.ToString("x2"));}return sub.ToString();
} 

tostring("x2")中x表示16进制 而且区分大小写   X输出为大写   x输出为小写

调用

string resultStr="我是内容";
Sha1Signature(resultStr, Encoding.UTF8);

有一种比较简单

SHA1相关类：

System.Security.Cryptography.SHA1

System.Security.Cryptography.SHA1CryptoServiceProvider()

System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(strSource, "SHA1")

 这种 官方提示已过时

System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(strSource, "SHA1")

实现1

转载：【转】asp(c#)加密解密算法之sha1、md5、des、aes实现源码详解 - 神叉 - 博客园

/// <summary>
/// 对字符串SHA1加密
/// </summary>
/// <param name="source">源字符串</param>
/// <param name="encoding">编码类型</param>
/// <returns>加密后的十六进制字符串</returns>
public static string Sha1Encrypt(string source, Encoding encoding = null)
{if (encoding == null) encoding = Encoding.UTF8;// 第一种方式byte[] byteArray = encoding.GetBytes(source);using (HashAlgorithm hashAlgorithm = new SHA1CryptoServiceProvider()){byteArray = hashAlgorithm.ComputeHash(byteArray);StringBuilder stringBuilder = new StringBuilder(256);foreach (byte item in byteArray){stringBuilder.AppendFormat("{0:x2}", item);}hashAlgorithm.Clear();return stringBuilder.ToString();}第二种方式//using (SHA1 sha1 = SHA1.Create())//{//    byte[] hash = sha1.ComputeHash(encoding.GetBytes(source));//    StringBuilder stringBuilder = new StringBuilder();//    for (int index = 0; index < hash.Length; ++index)//        stringBuilder.Append(hash[index].ToString("x2"));//    sha1.Clear();//    return stringBuilder.ToString();//}
}

tostring("x2")中x表示16进制 而且区分大小写   X输出为大写   x输出为小写

实现2

转载：C# sha1加密_天马3798-CSDN博客_c# sha1

        /// <summary>/// SHA1 加密，返回大写字符串/// </summary>/// <param name="content">需要加密字符串</param>/// <returns>返回40位UTF8 大写</returns>public static string SHA1(string content){return SHA1(content, Encoding.UTF8);}/// <summary>/// SHA1 加密，返回大写字符串/// </summary>/// <param name="content">需要加密字符串</param>/// <param name="encode">指定加密编码</param>/// <returns>返回40位大写字符串</returns>public static string SHA1(string content, Encoding encode){try{SHA1 sha1 = new SHA1CryptoServiceProvider();byte[] bytes_in = encode.GetBytes(content);byte[] bytes_out = sha1.ComputeHash(bytes_in);sha1.Dispose();string result = BitConverter.ToString(bytes_out);result = result.Replace("-", "");return result;}catch (Exception ex){throw new Exception("SHA1加密出错：" + ex.Message);}}

实现3

转载：

Asp.Net 实现SHA1加密-HiError

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;namespace WebToolkit.Encrypt
{public class SHA1Helper{/// <summary>/// Net实现Sha1加密算法/// </summary>/// <param name="str">要加密的字符串,默认编码为UTF-8</param>/// <returns>加密后的十六进制的哈希散列（字符串）</returns>public static string Sha1Signature(string str){return Sha1Signature(str, Encoding.UTF8);}public static string Sha1Signature(string str, Encoding encoding){var buffer = encoding.GetBytes(str);var data = SHA1.Create().ComputeHash(buffer);StringBuilder sub = new StringBuilder();foreach (var t in data){sub.Append(t.ToString("X2"));}return sub.ToString();}}
}

tostring("x2")中x表示16进制 而且区分大小写   X输出为大写   x输出为小写