C#编程之AES加密（一）
2021-01-27 00:15
标签：form 参考 bytes str 图片 说明 writer amp display 这里我们主要参考一下官方的例程： 当然，具体的解说，可以参考一下官方说明，以下是例程的链接： https://docs.microsoft.com/en-us/dotnet/api/system.security.cryptography.aes?view=netframework-4.8 这例程，运行后，我们添加一个暂停，就可以查看运行结果，在main结束前，添加： Console.ReadKey(); ，大家也可以添加其他的参数显示出来。具体这里就一一列举了。 后续，我们将针对AES加密做更进一步的说明。 End. 谢谢. C#编程之AES加密（一） 标签：form 参考 bytes str 图片 说明 writer amp display 原文地址：https://www.cnblogs.com/lumao1122-Milolu/p/11957924.html
1 using System;
2 using System.IO;
3 using System.Security.Cryptography;
4
5 namespace Aes_Example
6 {
7 class AesExample
8 {
9 public static void Main()
10 {
11 string original = "Here is some data to encrypt!";
12
13 // Create a new instance of the Aes
14 // class. This generates a new key and initialization
15 // vector (IV).
16 using (Aes myAes = Aes.Create())
17 {
18
19 // Encrypt the string to an array of bytes.
20 byte[] encrypted = EncryptStringToBytes_Aes(original, myAes.Key, myAes.IV);
21
22 // Decrypt the bytes to a string.
23 string roundtrip = DecryptStringFromBytes_Aes(encrypted, myAes.Key, myAes.IV);
24
25 //Display the original data and the decrypted data.
26 Console.WriteLine("Original: {0}", original);
27 Console.WriteLine("Round Trip: {0}", roundtrip);
28 }
29 Console.ReadKey();
30 }
31 static byte[] EncryptStringToBytes_Aes(string plainText, byte[] Key, byte[] IV)
32 {
33 // Check arguments.
34 if (plainText == null || plainText.Length 0)
35 throw new ArgumentNullException("plainText");
36 if (Key == null || Key.Length 0)
37 throw new ArgumentNullException("Key");
38 if (IV == null || IV.Length 0)
39 throw new ArgumentNullException("IV");
40 byte[] encrypted;
41
42 // Create an Aes object
43 // with the specified key and IV.
44 using (Aes aesAlg = Aes.Create())
45 {
46 aesAlg.Key = Key;
47 aesAlg.IV = IV;
48
49 // Create an encryptor to perform the stream transform.
50 ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
51
52 // Create the streams used for encryption.
53 using (MemoryStream msEncrypt = new MemoryStream())
54 {
55 using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
56 {
57 using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
58 {
59 //Write all data to the stream.
60 swEncrypt.Write(plainText);
61 }
62 encrypted = msEncrypt.ToArray();
63 }
64 }
65 }
66
67
68 // Return the encrypted bytes from the memory stream.
69 return encrypted;
70
71 }
72
73 static string DecryptStringFromBytes_Aes(byte[] cipherText, byte[] Key, byte[] IV)
74 {
75 // Check arguments.
76 if (cipherText == null || cipherText.Length 0)
77 throw new ArgumentNullException("cipherText");
78 if (Key == null || Key.Length 0)
79 throw new ArgumentNullException("Key");
80 if (IV == null || IV.Length 0)
81 throw new ArgumentNullException("IV");
82
83 // Declare the string used to hold
84 // the decrypted text.
85 string plaintext = null;
86
87 // Create an Aes object
88 // with the specified key and IV.
89 using (Aes aesAlg = Aes.Create())
90 {
91 aesAlg.Key = Key;
92 aesAlg.IV = IV;
93
94 // Create a decryptor to perform the stream transform.
95 ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
96
97 // Create the streams used for decryption.
98 using (MemoryStream msDecrypt = new MemoryStream(cipherText))
99 {
100 using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
101 {
102 using (StreamReader srDecrypt = new StreamReader(csDecrypt))
103 {
104
105 // Read the decrypted bytes from the decrypting stream
106 // and place them in a string.
107 plaintext = srDecrypt.ReadToEnd();
108 }
109 }
110 }
111
112 }
113
114 return plaintext;
115
116 }
117 }
118 }