C#编程之AES加密（三）
作者：互联网
这一章我们将上一章的内容做进一步完善，由用户输入需要加密的序列号，进行加密：
因为我们输入的都是以字符的形式读取，所以第一步要将读取到的字符存入到数组中： char[] inputBuf = str.ToCharArray();
之后对这个数组进行转换成16进制，例如输入A5两个字符，我们要将其转成16进制数，即为0xA5，并将其装入byte数组内。
if (inputBuf[j] >= '0' && '9' >= inputBuf[j]) outBuf[i] = (byte)(inputBuf[j++] - '0');
else if (('f' >= inputBuf[j]) && (inputBuf[j] >= 'a')) outBuf[i] = (byte)(inputBuf[j++] - 0x57);
else if (('F' >= inputBuf[j]) && (inputBuf[j] >= 'A')) outBuf[i] = (byte)(inputBuf[j++] - 0x37);
else throw new Exception("ERROR: Format incorrect.");
outBuf[i] <<= 4;
if (inputBuf[j] >= '0' && '9' >= inputBuf[j]) outBuf[i] |= (byte)(inputBuf[j++] - '0');
else if (('f' >= inputBuf[j]) && (inputBuf[j] >= 'a')) outBuf[i] |= (byte)(inputBuf[j++] - 0x57);
else if (('F' >= inputBuf[j]) && (inputBuf[j] >= 'A')) outBuf[i] |= (byte)(inputBuf[j++] - 0x37);
else throw new Exception("ERROR: Format incorrect.");
最后有我们内部定义的秘钥对这个byte数组元素进行加密，完成我们的加密算法：
aes.IV = new byte[16];
aes.Key = new byte[] { 0x1F, 0x54, 0x52, 0x6A, 0x73, 0x93, 0x58, 0x9E, 0x4B, 0xCF, 0xFB, 0xAE, 0xFC, 0x97, 0x59, 0x3E };
//aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.None;
var cryptoTransform = aes.CreateEncryptor();
byte[] resultBuff = cryptoTransform.TransformFinalBlock(outBuf, 0, outBuf.Length);
为了美观，我们可以对字体进行颜色修改： Console.ForegroundColor = ConsoleColor.yourColorCode;
完整代码：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Text;
5 using System.Threading.Tasks;
6 using System.Security.Cryptography;
7
8 namespace aesDemo
9 {
10 class Program
11 {
12 static void Main(string[] args)
13 {
14 Console.WriteLine("========================================================================");
15 Console.WriteLine(" Copyright: GALAXY .ltd in China");
16 Console.WriteLine(" Designed by: Milo lu");
17 Console.WriteLine(" Date: Des 05 2019");
18 Console.WriteLine(" Version: 12052019");
19 Console.WriteLine("e.g.");
20 Console.WriteLine(" enter:FD5D9BE05cdb8376a1861896fd5d9be0");
21 Console.WriteLine(" print: 05F14C987E2E65FC6AB5A41CA7B5429D");
22 Console.WriteLine("=========================================================================");
23 int color = 2;
24 while (true)
25 {
26 try
27 {
28 using (var aes = new RijndaelManaged())
29 {
30 Console.ForegroundColor = (System.ConsoleColor)color++;
31 if (color >= 16) color = 2;
32 Console.WriteLine("-------------------------------------------");
33 Console.WriteLine("Enter 16 hex:");
34 string str = Console.ReadLine();
35
36 if(str.Length!=32)
37 {
38 if (str == "exit" || str == "EXIT")
39 {
40 break;
41 }
42 throw new Exception("ERROR: Enter 16 hex.");
43 }
44 char[] inputBuf = str.ToCharArray();
45 byte[] outBuf=new byte[16];
46 for (int i = 0, j = 0; i < 16; i++)
47 {
48 if (inputBuf[j] >= '0' && '9' >= inputBuf[j]) outBuf[i] = (byte)(inputBuf[j++] - '0');
49 else if (('f' >= inputBuf[j]) && (inputBuf[j] >= 'a')) outBuf[i] = (byte)(inputBuf[j++] - 0x57);
50 else if (('F' >= inputBuf[j]) && (inputBuf[j] >= 'A')) outBuf[i] = (byte)(inputBuf[j++] - 0x37);
51 else throw new Exception("ERROR: Format incorrect.");
52 outBuf[i] <<= 4;
53 if (inputBuf[j] >= '0' && '9' >= inputBuf[j]) outBuf[i] |= (byte)(inputBuf[j++] - '0');
54 else if (('f' >= inputBuf[j]) && (inputBuf[j] >= 'a')) outBuf[i] |= (byte)(inputBuf[j++] - 0x57);
55 else if (('F' >= inputBuf[j]) && (inputBuf[j] >= 'A')) outBuf[i] |= (byte)(inputBuf[j++] - 0x37);
56 else throw new Exception("ERROR: Format incorrect.");
57 }
58 /// aes cryption
59 aes.IV = new byte[16];
60 aes.Key = new byte[] { 0x1F, 0x54, 0x52, 0x6A, 0x73, 0x93, 0x58, 0x9E, 0x4B, 0xCF, 0xFB, 0xAE, 0xFC, 0x97, 0x59, 0x3E };
61 //aes.Mode = CipherMode.CBC;
62 aes.Padding = PaddingMode.None;
63 var cryptoTransform = aes.CreateEncryptor();
64 byte[] resultBuff = cryptoTransform.TransformFinalBlock(outBuf, 0, outBuf.Length);
65 Console.WriteLine("Encoding: ");
66 foreach (byte i in resultBuff)
67 Console.Write("{0:X2}", i);
68 Console.WriteLine();
69 Console.WriteLine("Decoding:");
70 cryptoTransform = aes.CreateDecryptor();
71 resultBuff = cryptoTransform.TransformFinalBlock(resultBuff, 0, resultBuff.Length);
72 foreach (byte i in resultBuff)
73 Console.Write("{0:X2}", i);
74 Console.WriteLine();
75 }
76 }
77 catch (Exception ex)
78 {
79 Console.WriteLine(ex.Message);
80 }
81 }
82 }
83 }
84 }
View Code
编译运行:
至此，我们已经基本掌握了AES加密算法。从下一章开始，我们将开始着手设计由接收有外设备通过串口发送过来的序列号，并对这些序列号进行加密，最后再通过串口发送给外设备。
End.
谢谢.
标签：AES,inputBuf,Console,outBuf,C#,编程,++,WriteLine,byte 来源： https://www.cnblogs.com/lumao1122-Milolu/p/11989333.html