using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace EShang.Common
{
    /// <summary>
    /// SHA1签名相关方法
    /// </summary>
    public class SHA1Util
    {
        /// <summary>
        /// SHA1签名
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static string SHA1Signature(string input)
        {
            using (SHA1 sha1Hash = SHA1.Create())
            {
                // 将输入字符串转换为字节数组
                byte[] inputBytes = Encoding.UTF8.GetBytes(input);
                // 计算输入的 SHA1 哈希值
                byte[] hashBytes = sha1Hash.ComputeHash(inputBytes);

                // 将哈希字节数组转换为十六进制字符串
                StringBuilder hashStringBuilder = new StringBuilder();
                foreach (byte b in hashBytes)
                {
                    hashStringBuilder.Append(b.ToString("x2"));
                }

                // 返回 SHA1 签名的十六进制字符串
                return hashStringBuilder.ToString();
            }
        }
    }
}