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using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace 加密
{
class Program
{
static void Main(string[] args)
{
//RSA
//var dicKey = RSAHelper.GetKey();
//Console.WriteLine($"{dicKey["PublicKey"]}\r\n{dicKey["PrivateKey"]}");
//string strText = "aaabbbcc";
//Console.WriteLine("要加密的字符串是：{0}", strText);
//string str1 = RSAHelper.Encrypt(strText, dicKey["PublicKey"]);
//Console.WriteLine("加密后的字符串：{0}", str1);
//string str2 = RSAHelper.Decrypt(str1, dicKey["PrivateKey"]);
//Console.WriteLine("解密后的字符串：{0}", str2);
//AES
string password = "abcAE#$M&*987";
Console.WriteLine($"原始密码为:{password} ");
// AES的key支持128位，最大支持256位。256位需要32个字节。
//string key = "1234567890qwerty1234567890qwerty";//32字节
string key = AESHelper.GetRandomStr(32, true, true, true, true);
var EncryptStr = AESHelper.Encrypt(key, password);
Console.WriteLine($"使用密钥:{key} 为原密码：{password} 加密");
Console.WriteLine($"得到密文：{EncryptStr}");
Console.WriteLine($"使用密钥:{key} 为密文：{EncryptStr} 解密");
var realPwd = AESHelper.Decrypt(key, EncryptStr);
Console.WriteLine($"得到原密码：{realPwd}");
}
}
public static class RSAHelper
{
/// <summary>
/// 使用公钥加密
/// </summary>
/// <returns></returns>
public static string Encrypt(string text, string publicKey)
{
byte[] byteEncrypt;
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
{
rsa.ImportCspBlob(Convert.FromBase64String(publicKey));
byte[] byteText = Encoding.UTF8.GetBytes(text);
byteEncrypt = rsa.Encrypt(byteText, false);
}
return Convert.ToBase64String(byteEncrypt);
}
/// <summary>
/// 私钥解密
/// </summary>
/// <param name="strEntryText"></param>
/// <param name="strPrivateKey"></param>
/// <returns></returns>
public static string Decrypt(string encryptText, string privateKey)
{
byte[] byteText;
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
{
rsa.ImportCspBlob(Convert.FromBase64String(privateKey));
byte[] byteEncrypt = Convert.FromBase64String(encryptText);
byteText = rsa.Decrypt(byteEncrypt, false);
}
return Encoding.UTF8.GetString(byteText);
}
/// <summary>
/// 获取公钥和私钥
/// </summary>
/// <returns></returns>
public static Dictionary<string, string> GetKey()
{
Dictionary<string, string> dicKey = new Dictionary<string, string>();
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())
{
string public_Key = Convert.ToBase64String(rsa.ExportCspBlob(false));
string private_Key = Convert.ToBase64String(rsa.ExportCspBlob(true));
dicKey.Add("PublicKey", public_Key);
dicKey.Add("PrivateKey", private_Key);
}
return dicKey;
}
}
public static class AESHelper
{
//为什么要用base64,因为得到的密文是byte[]，所以默认用base64转成str方便查看
// AES 加密的初始化向量,加密解密需设置相同的值。需要是16字节
public static byte[] AES_IV = Encoding.UTF8.GetBytes("1234567890123458");
/// <summary>
/// 加密
/// </summary>
/// <param name="key">密钥</param>
/// <param name="data">要被加密的明文</param>
/// <returns>密文base64</returns>
public static string Encrypt(string key, string data)
{
using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
{
aesAlg.Key = Encoding.UTF8.GetBytes(key);
aesAlg.IV = AES_IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(data);
}
byte[] bytes = msEncrypt.ToArray();
return Convert.ToBase64String(bytes);
}
}
}
}
/// <summary>
/// 解密
/// </summary>
/// <param name="key">密钥</param>
/// <param name="encryptData">密文</param>
/// <returns>明文</returns>
public static string Decrypt(string key, string encryptData)
{
byte[] inputBytes = Convert.FromBase64String(encryptData);
using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
{
aesAlg.Key = Encoding.UTF8.GetBytes(key);
aesAlg.IV = AES_IV;
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream(inputBytes))
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srEncrypt = new StreamReader(csEncrypt))
{
return srEncrypt.ReadToEnd();
}
}
}
}
}
#region 生成指定长度的随机字符串
/// <summary>
/// 生成指定长度的随机字符串
/// </summary>
/// <param name="intLength">随机字符串长度</param>
/// <param name="booNumber">生成的字符串中是否包含数字</param>
/// <param name="booSign">生成的字符串中是否包含符号</param>
/// <param name="booSmallword">生成的字符串中是否包含小写字母</param>
/// <param name="booBigword">生成的字符串中是否包含大写字母</param>
/// <returns></returns>
public static string GetRandomStr(int intLength, bool booNumber, bool booSign, bool booSmallword, bool booBigword)
{
//定义
Random ranA = new Random();
int intResultRound = 0;
int intA = 0;
string strB = "";
while (intResultRound < intLength)
{
//生成随机数A，表示生成类型
//1=数字，2=符号，3=小写字母，4=大写字母
intA = ranA.Next(1, 5);
//如果随机数A=1，则运行生成数字
//生成随机数A，范围在0-10
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 1 && booNumber)
{
intA = ranA.Next(0, 10);
strB = intA.ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
//如果随机数A=2，则运行生成符号
//生成随机数A，表示生成值域
//1：33-47值域，2：58-64值域，3：91-96值域，4：123-126值域
if (intA == 2 && booSign)
{
intA = ranA.Next(1, 5);
//如果A=1
//生成随机数A，33-47的Ascii码
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 1)
{
intA = ranA.Next(33, 48);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
//如果A=2
//生成随机数A，58-64的Ascii码
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 2)
{
intA = ranA.Next(58, 65);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
//如果A=3
//生成随机数A，91-96的Ascii码
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 3)
{
intA = ranA.Next(91, 97);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
//如果A=4
//生成随机数A，123-126的Ascii码
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 4)
{
intA = ranA.Next(123, 127);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
}
//如果随机数A=3，则运行生成小写字母
//生成随机数A，范围在97-122
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 3 && booSmallword)
{
intA = ranA.Next(97, 123);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
//如果随机数A=4，则运行生成大写字母
//生成随机数A，范围在65-90
//把随机数A，转成字符
//生成完，位数+1，字符串累加，结束本次循环
if (intA == 4 && booBigword)
{
intA = ranA.Next(65, 89);
strB = ((char)intA).ToString() + strB;
intResultRound = intResultRound + 1;
continue;
}
}
return strB;
}
#endregion
}
}
