How to mask the URL in ASP.NET CORE ?

Question

Sachin Singh · Answer

public static class EncryptDecryptHelper { private const string AesIV256 = @"!QAZ2WSX#EDC4RFV"; private const string AesKey256 = @"5TGB&YHN7UJM(IK /// AES decryption /// public static string Decrypt(string text) { // AesCryptoServiceProvider AesCryptoServiceProvider aes = new AesCryptoServiceProvider(); aes.BlockSize = 128; aes.KeySize = 256; aes.IV = Encoding.UTF8.GetBytes(AesIV256); aes.Key = Encoding.UTF8.GetBytes(AesKey256); aes.Mode = CipherMode.CBC; aes.Padding = PaddingMode.PKCS7; // Convert Base64 strings to byte array byte[] src = System.Convert.FromBase64String(text); // decryption using (ICryptoTransform decrypt = aes.CreateDecryptor()) { byte[] dest = decrypt.TransformFinalBlock(src, 0, src.Length); return Encoding.Unicode.GetString(dest); } } public static string EncryptUrl(string text) { if (!string.IsNullOrWhiteSpace(text)) { // AesCryptoServiceProvider AesCryptoServiceProvider aes = new AesCryptoServiceProvider(); aes.BlockSize = 128; aes.KeySize = 256; aes.IV = Encoding.UTF8.GetBytes(AesIV256); aes.Key = Encoding.UTF8.GetBytes(AesKey256); aes.Mode = CipherMode.CBC; aes.Padding = PaddingMode.PKCS7; // Convert string to byte array byte[] src = Encoding.Unicode.GetBytes(text); // encryption using (ICryptoTransform encrypt = aes.CreateEncryptor()) { byte[] dest = encrypt.TransformFinalBlock(src, 0, src.Length); // Convert byte array to Base64 strings return HttpUtility.UrlEncode(Convert.ToBase64String(dest)); } } return string.Empty; } public static string EncryptUrl(this object text) { if (!string.IsNullOrWhiteSpace(text.ToString())) { // AesCryptoServiceProvider AesCryptoServiceProvider aes = new AesCryptoServiceProvider(); aes.BlockSize = 128; aes.KeySize = 256; aes.IV = Encoding.UTF8.GetBytes(AesIV256); aes.Key = Encoding.UTF8.GetBytes(AesKey256); aes.Mode = CipherMode.CBC; aes.Padding = PaddingMode.PKCS7; // Convert string to byte array byte[] src = Encoding.Unicode.GetBytes(text.ToString()); // encryption using (ICryptoTransform encrypt = aes.CreateEncryptor()) { byte[] dest = encrypt.TransformFinalBlock(src, 0, src.Length); // Convert byte array to Base64 strings return HttpUtility.UrlEncode(Convert.ToBase64String(dest)); } } return string.Empty; } /// /// AES decryption /// public static string DecryptUrl(string text) { if (!string.IsNullOrWhiteSpace(text) && text!= "undefined") { // AesCryptoServiceProvider AesCryptoServiceProvider aes = new AesCryptoServiceProvider(); aes.BlockSize = 128; aes.KeySize = 256; aes.IV = Encoding.UTF8.GetBytes(AesIV256); aes.Key = Encoding.UTF8.GetBytes(AesKey256); aes.Mode = CipherMode.CBC; aes.Padding = PaddingMode.PKCS7; text = text.Replace("%2b", "+").Replace("%2f", "/").Replace("%3d", "="); // Convert Base64 strings to byte array byte[] src = System.Convert.FromBase64String(text); // decryption using (ICryptoTransform decrypt = aes.CreateDecryptor()) { byte[] dest = decrypt.TransformFinalBlock(src, 0, src.Length); return HttpUtility.UrlDecode(Encoding.Unicode.GetString(dest)); } } return string.Empty; } public static string EncodeBase64(string plainText) { var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText); return System.Convert.ToBase64String(plainTextBytes); } public static string DecodeBase64(string base64EncodedData) { try { var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData); return System.Text.Encoding.UTF8.GetString(base64EncodedBytes); } catch(Exception ex) { return string.Empty; } } #region SHA HASH public static string SHA512(string input) { var bytes = System.Text.Encoding.UTF8.GetBytes(input); using (var hash = System.Security.Cryptography.SHA512.Create()) { var hashedInputBytes = hash.ComputeHash(bytes); // Convert to text // StringBuilder Capacity is 128, because 512 bits / 8 bits in byte * 2 symbols for byte var hashedInputStringBuilder = new System.Text.StringBuilder(128); foreach (var b in hashedInputBytes) hashedInputStringBuilder.Append(b.ToString("X2")); return hashedInputStringBuilder.ToString(); } } #endregion } ? now you can use it in anchor tags as href="Home/index/@EncryptDecryptHelper.EncryptURL(senssitiveData)" and on the controller part you can decrypt.

Aryan Kumar · Answer

Thank you so much, Sachin !!