c#.net4.0 实现HMAC-SHA1加密算法
using System.Security.Cryptography;
/// <summary>
/// HMAC-SHA1加密算法
/// </summary>
/// <param name="key">密钥</param>
/// <param name="input">要加密的串</param>
/// <returns></returns>
public static string HmacSha1(string key,string input)
{
byte[] keyBytes = ASCIIEncoding.ASCII.GetBytes(key);
byte[] inputBytes = ASCIIEncoding.ASCII.GetBytes(input);
HMACSHA1 hmac = new HMACSHA1(keyBytes);
byte[] hashBytes = hmac.ComputeHash(inputBytes);
return Convert.ToBase64String(hashBytes);
}