这里我们主要参考一下官方的例程:
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 }
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.