2022 jphd-3dprint

Utils/CipherHelper.cs

@@ -0,0 +1,92 @@
+using System;
+using System.IO;
+using System.Security.Cryptography;
+
+namespace _2021_backend.Utils
+{
+    public static class CipherHelper
+    {
+        static byte[] EncryptStringToBytes_Aes(string plainText, byte[] Key, byte[] IV)
+        {
+            // Check arguments.
+            if (plainText == null || plainText.Length <= 0)
+                throw new ArgumentNullException("plainText");
+            if (Key == null || Key.Length <= 0)
+                throw new ArgumentNullException("Key");
+            if (IV == null || IV.Length <= 0)
+                throw new ArgumentNullException("IV");
+            byte[] encrypted;
+
+            // Create an Aes object
+            // with the specified key and IV.
+            using (Aes aesAlg = Aes.Create())
+            {
+                aesAlg.Key = Key;
+                aesAlg.IV = IV;
+
+                // Create an encryptor to perform the stream transform.
+                ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
+
+                // Create the streams used for encryption.
+                using (MemoryStream msEncrypt = new MemoryStream())
+                {
+                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
+                    {
+                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
+                        {
+                            //Write all data to the stream.
+                            swEncrypt.Write(plainText);
+                        }
+                        encrypted = msEncrypt.ToArray();
+                    }
+                }
+            }
+
+            // Return the encrypted bytes from the memory stream.
+            return encrypted;
+        }
+
+        static string DecryptStringFromBytes_Aes(byte[] cipherText, byte[] Key, byte[] IV)
+        {
+            // Check arguments.
+            if (cipherText == null || cipherText.Length <= 0)
+                throw new ArgumentNullException("cipherText");
+            if (Key == null || Key.Length <= 0)
+                throw new ArgumentNullException("Key");
+            if (IV == null || IV.Length <= 0)
+                throw new ArgumentNullException("IV");
+
+            // Declare the string used to hold
+            // the decrypted text.
+            string plaintext = null;
+
+            // Create an Aes object
+            // with the specified key and IV.
+            using (Aes aesAlg = Aes.Create())
+            {
+                aesAlg.Key = Key;
+                aesAlg.IV = IV;
+
+                // Create a decryptor to perform the stream transform.
+                ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
+
+                // Create the streams used for decryption.
+                using (MemoryStream msDecrypt = new MemoryStream(cipherText))
+                {
+                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
+                    {
+                        using (StreamReader srDecrypt = new StreamReader(csDecrypt))
+                        {
+
+                            // Read the decrypted bytes from the decrypting stream
+                            // and place them in a string.
+                            plaintext = srDecrypt.ReadToEnd();
+                        }
+                    }
+                }
+            }
+
+            return plaintext;
+        }
+    }
+}

Utils/TencentSMS.cs

@@ -9,6 +9,7 @@ using TencentCloud.Common;
 using TencentCloud.Common.Profile;
 using TencentCloud.Sms.V20210111;
 using TencentCloud.Sms.V20210111.Models;
+using System.Security.Cryptography;
 
 namespace _2021_backend.Utils
 {
@@ -21,12 +22,13 @@ namespace _2021_backend.Utils
         public static string SMSID_reject { get; set; }
         public static string SMSID_timeSet { get; set; }
         public static string SMSID_signed { get; set; }
+        public static string SMSID_captcha { get; set; }
 
         private static bool Initialized = false;
 
         private static string SMSID_timeSelect { get; set; }
 
-        public static void Init(string tencentid, string tencentKey, string appid, string ID_accept, string ID_reject, string ID_timeSet, string ID_submitted, string ID_timeSelect)
+        public static void Init(string tencentid, string tencentKey, string appid, string ID_accept, string ID_reject, string ID_timeSet, string ID_submitted, string ID_timeSelect,string ID_captcha)
         {
             Tencent_id = tencentid;
             Tencent_key = tencentKey;
@@ -36,6 +38,7 @@ namespace _2021_backend.Utils
             SMSID_timeSet = ID_timeSet;
             SMSID_signed = ID_submitted;
             SMSID_timeSelect = ID_timeSelect;
+            SMSID_captcha = ID_captcha;
             Initialized = true;
         }
         public static async Task<bool> Pull(BackendContext Context, Student stu, bool fullPull)
@@ -145,6 +148,18 @@ namespace _2021_backend.Utils
                         req.TemplateParamSet = new string[] { stu.Name };
                         req.TemplateId = SMSID_signed;
                         break;
+                    case SMSType.Captcha:
+                        sms.Type = SMSType.Captcha;
+                        var captchaBytes = new byte[]{0,0,0,0,0,0};
+                        RNGCryptoServiceProvider csp = new RNGCryptoServiceProvider();
+                        csp.GetBytes(captchaBytes);
+                        for (int i = 0; i < 6; i++) captchaBytes[i] %= 10;
+                        string captcha = $"{captchaBytes[0]}{captchaBytes[1]}{captchaBytes[2]}{captchaBytes[3]}{captchaBytes[4]}{captchaBytes[5]}";
+                        stu.LastCaptcha = captcha;
+                        stu.LastCaptchaTime = DateTime.Now;
+                        req.TemplateParamSet = new string[] { captcha };
+                        req.TemplateId = SMSID_captcha;
+                        break;
                 }
                 sms.Tel = stu.Tel;
                 sms.Host = stu.Id;