How can convert SHA1 Hashing function in nodejs that already implemented in .net C#

Question

I am beginner in nodejs. I have already implemented encryption and decryption through sha1 and using in asp.net projects. Now we started new project in node and angular. Here i need same login mechanism including encryption and decryption using sha1.

Here is my workable code:

Dependent variable must need for me

        static string passPhrase = "Paaaa5p***";
        static string saltValue = "s@1t***lue";
        static string hashAlgorithm = "SHA1";
        static int passwordIterations = 2;
        static string initVector = "@1B2c3D4e5F6****";
        static int keySize = 256;

Encryption method to encrypt password or any text.

public static string EncryptText(string text)
        {

            byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
            byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);

            byte[] plainTextBytes = Encoding.UTF8.GetBytes(text);

            PasswordDeriveBytes password = new PasswordDeriveBytes(
                                                            passPhrase,
                                                            saltValueBytes,
                                                            hashAlgorithm,
                                                            passwordIterations);

            byte[] keyBytes = password.GetBytes(keySize / 8);


            RijndaelManaged symmetricKey = new RijndaelManaged();


            symmetricKey.Mode = CipherMode.CBC;


            ICryptoTransform encryptor = symmetricKey.CreateEncryptor(
                                                             keyBytes,
                                                             initVectorBytes);


            MemoryStream memoryStream = new MemoryStream();


            CryptoStream cryptoStream = new CryptoStream(memoryStream,
                                                         encryptor,
                                                         CryptoStreamMode.Write);

            cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);


            cryptoStream.FlushFinalBlock();


            byte[] cipherTextBytes = memoryStream.ToArray();


            memoryStream.Close();
            cryptoStream.Close();


            string decryptText = Convert.ToBase64String(cipherTextBytes);


            return decryptText;
        }

Decryption method to encrypt password or any text.

    public static string DecryptText(string encryptText)
    {

        byte[] initVectorBytes = Encoding.ASCII.GetBytes(initVector);
        byte[] saltValueBytes = Encoding.ASCII.GetBytes(saltValue);
        byte[] cipherTextBytes = Convert.FromBase64String(encryptText);

        PasswordDeriveBytes password = new PasswordDeriveBytes(
                                                        passPhrase,
                                                        saltValueBytes,
                                                        hashAlgorithm,
                                                        passwordIterations);

        byte[] keyBytes = password.GetBytes(keySize / 8);

        RijndaelManaged symmetricKey = new RijndaelManaged();

        symmetricKey.Mode = CipherMode.CBC;


        ICryptoTransform decryptor = symmetricKey.CreateDecryptor(
                                                         keyBytes,
                                                         initVectorBytes);

        MemoryStream memoryStream = new MemoryStream(cipherTextBytes);


        CryptoStream cryptoStream = new CryptoStream(memoryStream,
                                                      decryptor,
                                                      CryptoStreamMode.Read);


        byte[] plainTextBytes = new byte[cipherTextBytes.Length];


        int decryptedByteCount = cryptoStream.Read(plainTextBytes,
                                                   0,
                                                   plainTextBytes.Length);


        memoryStream.Close();
        cryptoStream.Close();


        string text = Encoding.UTF8.GetString(plainTextBytes,
                                                   0,
                                                   decryptedByteCount);


        return text;

    }

Answer 1

SHA1 is hash function. It's no way to get original data from hash (except collisions).

Your problem is not a hash, it's encrypt/decrypt algorithm. Try to use js-crypto-pbkdf from NPM.