我滴个乖乖

2025-02-20 15:20:28 +08:00
parent 4b54cca70b
commit 485cfcd6f2
2343 changed files with 495732 additions and 1022 deletions
--- a/ZelWiki.Security/Helpers.cs
+++ b/ZelWiki.Security/Helpers.cs
@@ -0,0 +1,98 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace ZelWiki.Security
+{
+    public static class Helpers
+    {
+        private static string? _machineKey;
+        public static string MachineKey
+            => _machineKey ??= Sha1(Environment.MachineName);
+
+        public static string GenerateRandomString(int maxLength = 10)
+        {
+            using var crypto = Aes.Create();
+            crypto.GenerateKey();
+            var result = Convert.ToBase64String(crypto.Key).Replace("/", "").Replace("=", "").Replace("+", "");
+
+            if (result.Length > maxLength)
+            {
+                result = result.Substring(0, maxLength);
+            }
+
+            return result.ToUpper();
+        }
+
+        public static int Crc32(string text)
+            => (int)(new Crc32()).Get(Encoding.Unicode.GetBytes(text));
+
+        public static int Crc32(byte[] bytes)
+            => (int)(new Crc32()).Get(bytes);
+
+        public static string Sha1(string text)
+            => BitConverter.ToString(SHA1.HashData(Encoding.Unicode.GetBytes(text))).Replace("-", "");
+
+        public static string Sha256(string value)
+        {
+            var hash = new StringBuilder();
+            byte[] crypto = SHA256.HashData(Encoding.UTF8.GetBytes(value));
+            foreach (byte theByte in crypto)
+            {
+                hash.Append(theByte.ToString("x2"));
+            }
+            return hash.ToString();
+        }
+
+        public static string EncryptString(string key, string plainText)
+        {
+            using var aes = Aes.Create();
+            byte[] iv = new byte[16];
+            byte[] keyBytes = SHA256.HashData(Encoding.Unicode.GetBytes(key));
+            byte[] vector = (byte[])keyBytes.Clone();
+
+            for (int i = 0; i < 16; i++)
+            {
+                iv[i] = vector[i];
+            }
+
+            aes.Key = keyBytes;
+            aes.IV = iv;
+
+            var encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
+
+            using var memoryStream = new MemoryStream();
+            using var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write);
+            using (var streamWriter = new StreamWriter(cryptoStream))
+            {
+                streamWriter.Write(plainText);
+            }
+
+            return Convert.ToBase64String(memoryStream.ToArray());
+        }
+
+        public static string DecryptString(string key, string cipherText)
+        {
+            byte[] buffer = Convert.FromBase64String(cipherText);
+
+            using var aes = Aes.Create();
+            byte[] iv = new byte[16];
+            byte[] keyBytes = SHA256.HashData(Encoding.Unicode.GetBytes(key));
+            byte[] vector = (byte[])keyBytes.Clone();
+
+            for (int i = 0; i < 16; i++)
+            {
+                iv[i] = vector[i];
+            }
+
+            aes.Key = keyBytes;
+            aes.IV = iv;
+
+            var cryptoTransform = aes.CreateDecryptor(aes.Key, aes.IV);
+
+            using var memoryStream = new MemoryStream(buffer);
+            using var cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Read);
+            using var streamReader = new StreamReader(cryptoStream);
+            return streamReader.ReadToEnd();
+        }
+    }
+}