138 lines
4.8 KiB
C#
138 lines
4.8 KiB
C#
using System;
|
||
using System.Collections.Generic;
|
||
using System.Drawing;
|
||
using System.IO;
|
||
using System.Linq;
|
||
using System.Text;
|
||
|
||
namespace CCS.Utility.Security
|
||
{
|
||
public static class Base64Helper
|
||
{
|
||
#region Base64加密解密
|
||
/// <summary>
|
||
/// Base64加密，采用指定字符编码方式加密。
|
||
/// </summary>
|
||
/// <param name="input">待加密的明文</param>
|
||
/// <param name="encode">字符编码</param>
|
||
/// <returns></returns>
|
||
public static string Base64Encrypt(this string input, Encoding encode)
|
||
{
|
||
return Convert.ToBase64String(encode.GetBytes(input));
|
||
}
|
||
|
||
/// <summary>
|
||
/// Base64加密，采用UTF8编码方式加密。
|
||
/// </summary>
|
||
/// <param name="input">待加密的明文</param>
|
||
/// <returns></returns>
|
||
public static string Base64Encrypt(this string input)
|
||
{
|
||
return Base64Encrypt(input, new UTF8Encoding());
|
||
}
|
||
|
||
/// <summary>
|
||
/// Base64解密，采用UTF8编码方式解密。
|
||
/// </summary>
|
||
/// <param name="input">待解密的秘文</param>
|
||
/// <returns></returns>
|
||
public static string Base64Decrypt(this string input)
|
||
{
|
||
return Base64Decrypt(input, new UTF8Encoding());
|
||
}
|
||
|
||
/// <summary>
|
||
/// Base64解密，采用指定字符编码方式解密。
|
||
/// </summary>
|
||
/// <param name="input">待解密的秘文</param>
|
||
/// <param name="encode">字符的编码</param>
|
||
/// <returns></returns>
|
||
public static string Base64Decrypt(this string input, Encoding encode)
|
||
{
|
||
return encode.GetString(Convert.FromBase64String(input));
|
||
}
|
||
#endregion
|
||
|
||
/// <summary>
|
||
/// 文件转base64字符串
|
||
/// </summary>
|
||
/// <param name="filePath"></param>
|
||
/// <returns></returns>
|
||
public static string FileToBase64(string filePath)
|
||
{
|
||
try
|
||
{
|
||
string base64Str;
|
||
using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
|
||
{
|
||
byte[] bt = new byte[fileStream.Length];
|
||
// 调用read读取方法
|
||
fileStream.Read(bt, 0, bt.Length);
|
||
base64Str = Convert.ToBase64String(bt);
|
||
}
|
||
return base64Str;
|
||
}
|
||
catch
|
||
{
|
||
return "";
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// base64字符串转文件字节数组
|
||
/// </summary>
|
||
/// <param name="base64"></param>
|
||
/// <returns></returns>
|
||
public static byte[] FileFromBase64(string base64)
|
||
{
|
||
return Convert.FromBase64String(base64);
|
||
}
|
||
|
||
|
||
|
||
/// <summary>
|
||
/// 将传进来的文件转换成字符串
|
||
/// </summary>
|
||
/// <param name="FilePath">待处理的文件路径(本地或服务器)</param>
|
||
/// <returns></returns>
|
||
public static string FileToBinary(string filePath)
|
||
{
|
||
//利用新传来的路径实例化一个FileStream对像
|
||
System.IO.FileStream fs = new System.IO.FileStream(filePath, System.IO.FileMode.Open, System.IO.FileAccess.Read);
|
||
//得到对象的大小
|
||
int fileLength = Convert.ToInt32(fs.Length);
|
||
//声明一个byte数组
|
||
byte[] fileByteArray = new byte[fileLength];
|
||
//声明一个读取二进流的BinaryReader对像
|
||
System.IO.BinaryReader br = new System.IO.BinaryReader(fs);
|
||
for (int i = 0; i < fileLength; i++)
|
||
{
|
||
//将数据读取出来放在数组中
|
||
br.Read(fileByteArray, 0, fileLength);
|
||
}
|
||
//装数组转换为String字符串
|
||
string strData = Convert.ToBase64String(fileByteArray);
|
||
br.Close();
|
||
fs.Close();
|
||
return strData;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 将传进来的字符串保存为文件
|
||
/// </summary>
|
||
/// <param name="path">需要保存的位置路径</param>
|
||
/// <param name="binary">需要转换的字符串</param>
|
||
public static void BinaryToFile(string path, string binary)
|
||
{
|
||
System.IO.FileStream fs = new System.IO.FileStream(path, System.IO.FileMode.Create, System.IO.FileAccess.Write);
|
||
//利用新传来的路径实例化一个FileStream对像
|
||
System.IO.BinaryWriter bw = new System.IO.BinaryWriter(fs);
|
||
//实例化一个用于写的BinaryWriter
|
||
byte[] buffer = Convert.FromBase64String(binary);
|
||
bw.Write(buffer);
|
||
bw.Close();
|
||
fs.Close();
|
||
}
|
||
}
|
||
}
|