求C#代码转化成E可调用的函数

舞笔

利用AesGcm加密的一个函数，他上面是加密的过程，但是没有带AesGcm的代码对于AesGcm加密上面他只调用了一个函数，但没有AesGcm具体的加密过程，AesGcm加密过程在我从其他地方找的https://github.com/indisoluble/AesGcm 求大神帮忙弄成E代码

舞笔

1. // Packages need to be installed:
   
2. // Sodium.Core
   
3. // System.Security.Cryptography.Algorithms
   
4. 
   
5. // The values of publicKey,keyId,version are from shared_data.
   
6. // You need to call https://www.instagram.com/data/shared_data/ to get shared_data first
   
7. public static string GenerateEncPassword(string password, string publicKey, string keyId, string version)
   
8. {
   
9.     var time = DateTime.UtcNow.ToTimestamp(); // Unix timestamp
   
10.     var keyBytes = publicKey.HexToBytes(); // Convert a hex string to a byte array
    
11.     var key = new byte[32];
    
12.     new Random().NextBytes(key);
    
13.     var iv = new byte[12];
    
14.     var tag = new byte[16];
    
15.     var plainText = password.ToBytes(); // ToBytes = Encoding.UTF8.GetBytes
    
16.     var cipherText = new byte[plainText.Length];
    
17. 
    
18.     using (var cipher = new AesGcm(key))
    
19.     {
    
20.         cipher.Encrypt(nonce: iv,
    
21.             plaintext: plainText,
    
22.             ciphertext: cipherText,
    
23.             tag: tag,
    
24.             associatedData: time.ToString().ToBytes()); // GetBytes = Encoding.UTF8.GetBytes
    
25.     }
    
26. 
    
27.     var encryptedKey = SealedPublicKeyBox.Create(key, keyBytes);
    
28.     var bytesOfLen = ((short)encryptedKey.Length).ToBytes(); // ToBytes = BitConverter.GetBytes(short);
    
29.     var info = new byte[] { 1, byte.Parse(keyId) };
    
30.     var bytes = info.Concat(bytesOfLen).Concat(encryptedKey).Concat(tag).Concat(cipherText); // Concat means that concat two array
    
31. 
    
32.     // expected: #PWD_INSTAGRAM_BROWSER:10:1595671654:ARBQAFWLYGkTT9UU0dyUCkaGTRFu0PH5Ph5s86DUAbZ+B9xon8cKmnqQGaUo7bB4NHCMKQRY69b9LwaJZ1rDw1OFM0LEGtI+KbDuDC0QnfJM6o1no0XPOl73RJoUZ/OfN5nE2q/IdqX0NFinS0faRf8=
    
33.     var str = $"#PWD_INSTAGRAM_BROWSER:{version}:{time}:{bytes.ToBase64()}"; // ToBase64 = Convert.ToBase64String
    
34.     return str;
    
35. }
    
36. 
    
37. public static byte[] HexToBytes(this string hex)
    
38. {
    
39.     return Enumerable.Range(0, hex.Length / 2)
    
40.         .Select(x => Convert.ToByte(hex.Substring(x * 2, 2), 16))
    
41.         .ToArray();
    
42. }
    
43. 
    
44. public static T[] Concat<T>(this T[] x, T[] y)
    
45. {
    
46.     var z = new T[x.Length + y.Length];
    
47.     x.CopyTo(z, 0);
    
48.     y.CopyTo(z, x.Length);
    
49.     return z;
    
50. }
    
51. 
    
52. private static readonly DateTime _jan1St1970 = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
    
53. public static long ToTimestamp(this DateTime d)
    
54. {
    
55.     return (long)(d.ToUniversalTime() - _jan1St1970).TotalSeconds;
    
56. }

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舞笔

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Sunfish

算法这种建议定制区，没几个人会去改
tip：Rs支持库有GCM

jingyi11023995

找现成的E代码比改容易得多。