instagram enc_password generation

Question

[我正在尝试通过C＃为instagram网络认证生成类以生成base64字符串。作为我代码的基础，我使用了这个node.js示例-click它看起来很棒并且完美地工作，但是我不知道如何实现这种魔力：

const key = crypto.pseudoRandomBytes(32);
publicKey = '5a0b3cd9a12fef6c786afe28cfceef60550d27ea6657bb15be4a271eaadb0903';
const encryptedKey = tweetnacl.sealedbox.seal(key, Buffer.from(publicKey, 'hex'));

对于aes-256-gcm加密，我使用BouncyCastle库，但是找不到类似tweetnacl.sealedbox.seal的操作据我了解，此操作返回的uint8array具有加密的publicKey

import nacl from 'tweetnacl';
import nonceGenerator from './nonce';
import {overheadLength} from './consts';
import {zero} from './utils';

export default function seal(m, pk){
    var c = new Uint8Array(overheadLength + m.length);

//overheadLength = nacl.box.publicKeyLength + nacl.box.overheadLength;

    var ek = nacl.box.keyPair();
    c.set(ek.publicKey);

    var nonce = nonceGenerator(ek.publicKey, pk);
    var boxed = nacl.box(m, nonce, pk, ek.secretKey);
    c.set(boxed, ek.publicKey.length);

    zero(ek.secretKey);

    return c;
};

我自己很难做，非常感谢您的帮助。

Answer 1

我尝试移植到c＃，但是解密存在问题

private static  encryptPassword(string password, string encryptionPubKey, string encryptionKeyId)
 {

            byte[] passwordAsByte = Encoding.ASCII.GetBytes(password);
            byte[] data = Convert.FromBase64String(encryptionPubKey);
            string decoededPubKey = Encoding.UTF8.GetString(data);


            decoededPubKey = decoededPubKey.Replace("-----BEGIN PUBLIC KEY-----", "");
    decoededPubKey = decoededPubKey.Replace("-----END PUBLIC KEY-----", "");
    SecureRandom random = new SecureRandom();
        byte[] randKey = new byte[32];
        random.NextBytes(randKey);
        byte[] iv = new byte[12];
        random.NextBytes(iv);
    //String date = String.valueOf(new Date().getTime() / 1000);
    long tsLong = DateTimeOffset.UtcNow.ToUnixTimeSeconds() / 1000;
        string date = tsLong.ToString();

            var header = new MemoryStream(2);
        header.Write(BitConverter.GetBytes(Convert.ToInt32(1)));
    header.Write(BitConverter.GetBytes(Convert.ToInt32(int.Parse(encryptionKeyId))));
            MemoryStream timeAAD = new MemoryStream(10);
        timeAAD.Write(Encoding.ASCII.GetBytes(date));
//////////////////////////////////////////////////////////////////
    X509EncodedKeySpec publicSpec = new X509EncodedKeySpec(Base64.decode(decoededPubKey, Base64.NO_WRAP));
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        PublicKey publicKey = keyFactory.generatePublic(publicSpec);
        Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        rsaCipher.init(Cipher.ENCRYPT_MODE, publicKey);
    byte[] rsaEncrypted = rsaCipher.doFinal(randKey);

            MemoryStream sizeBuff = new MemoryStream(2);
        sizeBuff.order(ByteOrder.LITTLE_ENDIAN);
    sizeBuff.putChar((char) rsaEncrypted.Length);
///////////////////////////////////////////////////////////////////////
    AeadParameters parameters = new AeadParameters(new KeyParameter(randKey), 128, iv, timeAAD.ToArray());
        GcmBlockCipher gcmEngine = new GcmBlockCipher(new AesFastEngine());
        gcmEngine.Init(true, parameters);
    byte[] gcmText = new byte[gcmEngine.GetOutputSize(passwordAsByte.Length)];
        int len = gcmEngine.ProcessBytes(passwordAsByte, 0, passwordAsByte.Length, gcmText, 0);
        gcmEngine.DoFinal(gcmText, len);
    byte[] encPass = Arrays.CopyOfRange(gcmText, 0, gcmText.Length - 16);
        byte[] authTag = Arrays.CopyOfRange(gcmText, gcmText.Length - 16, gcmText.Length);

            var a = header.Position + iv.Length + sizeBuff.Position + rsaEncrypted.Length + authTag.Length + encPass.Length;
            MemoryStream result = new MemoryStream(a);
        result.Write(header.ToArray());
    result.Write(iv);
    result.Write(sizeBuff.ToArray());
    result.Write(rsaEncrypted);
    result.Write(authTag);
    result.Write(encPass);

    //return new Pair(Convert.ToInt64(date), Base64.encodeToString(result.array(), Base64.NO_WRAP));
 }

这几乎是准备就绪的代码，如果有更正，请在注释中写出，我会修复它