public static string DECODE_DATA(string data)
{
try
{
string final_output = string.Empty;
if (string.IsNullOrEmpty(data))
{
throw new HttpResponseException(HttpStatusCode.NoContent);
}
string[] values = data.Split('.');
string RSA_ENCRYPTED_AES_KEY = values[0].Replace(" ", "+");
string ENCRYPTED_DATA = values[1].Replace(" ", "+");
string AES_KEY_PAIR = RSA_MODULE.RSA_Decrypt(RSA_ENCRYPTED_AES_KEY, RSA_MODULE.server_side_private_key_generator());
if (string.IsNullOrEmpty(AES_KEY_PAIR))
{
throw new HttpResponseException(HttpStatusCode.NoContent);
}
CLIEINT_AES_KEYS obj_AES = JsonConvert.DeserializeObject <CLIEINT_AES_KEYS>(AES_KEY_PAIR);
final_output = AES_MODULE.AES_DECRYPTION_DATA(ENCRYPTED_DATA, obj_AES.KEY, obj_AES.IV);
if (string.IsNullOrEmpty(final_output))
{
throw new HttpResponseException(HttpStatusCode.NoContent);
}
return(final_output);
}
catch (Exception ex)
{
throw new HttpResponseException(HttpStatusCode.BadRequest);
}
}
public static string DECODE_DATA(string data)
{
string token_json_format = string.Empty;
string final_output = string.Empty;
//spliting string into string array
if (string.IsNullOrEmpty(data))
{
throw new HttpResponseException(HttpStatusCode.NoContent);
}
string[] values = data.Split('.');
//assigning parameters
string TOKEN = values[0].Replace(" ", "+");
string RSA_ENCRYPTED_AES_KEY = values[1].Replace(" ", "+");
string ENCRYPTED_DATA = values[2].Replace(" ", "+");
try
{
//decrypting token to get token json string
token_json_format = AES_MODULE.AES_DECRYPTION_DATA(TOKEN, CORE_MODULE.TOKEN_AES_KEY, CORE_MODULE.TOKEN_AES_IV);
}
catch (Exception ex)
{
throw new HttpResponseException(HttpStatusCode.Unauthorized);
}
//converting json string into model object
TOKEN_MODEL token_params = JsonConvert.DeserializeObject <TOKEN_MODEL>(token_json_format);
//checking expiry time
if (!expiry_time_check(token_params.EXPIRY_TIME))
{
throw new HttpResponseException(HttpStatusCode.RequestTimeout);
}
//checking roles
if (!roles_check(token_params.ROLES, CORE_MODULE.roles))
{
throw new HttpResponseException(HttpStatusCode.Unauthorized);
}
//checking issuer
if (!issuer_check(token_params.ISSUER))
{
throw new HttpResponseException(HttpStatusCode.Unauthorized);
}
//checking audience
if (!audience_check(token_params.AUDIENCE))
{
throw new HttpResponseException(HttpStatusCode.Unauthorized);
}
try
{
//decrypting aes key pair for data decryption
string AES_KEY_PAIR = RSA_MODULE.RSA_Decrypt(RSA_ENCRYPTED_AES_KEY, RSA_MODULE.server_side_private_key_generator());
if (string.IsNullOrEmpty(AES_KEY_PAIR))
{
throw new HttpResponseException(HttpStatusCode.NoContent);
}
//creating model object for key pair
CLIEINT_AES_KEYS obj_AES = JsonConvert.DeserializeObject <CLIEINT_AES_KEYS>(AES_KEY_PAIR);
//decryption of data using AES key pair
final_output = AES_MODULE.AES_DECRYPTION_DATA(ENCRYPTED_DATA, obj_AES.KEY, obj_AES.IV);
if (string.IsNullOrEmpty(final_output))
{
throw new HttpResponseException(HttpStatusCode.NoContent);
}
CORE_MODULE.roles.Clear();
//returning decrypted value
return(final_output);
}
catch (Exception ex)
{
throw new HttpResponseException(HttpStatusCode.BadRequest);
}
}