public static SERVER_CLIENT_RSA_KEYS SERVER_CLIENT_RSA_PAIR()
{
SERVER_CLIENT_RSA_KEYS obj = new SERVER_CLIENT_RSA_KEYS();
obj.CLIENT_PRIVATE_KEY = RSA_MODULE.client_side_private_key_generator();
obj.CLIENT_PUBLIC_KEY = RSA_MODULE.client_side_public_key_generator();
obj.SESSION_KEY = EDITIONAL_METHODS.unique_code_generator(16);
return(obj);
}
public static string ENCODE_DATA(dynamic dynamic_data)
{
string data = JsonConvert.SerializeObject(dynamic_data);
try
{
string final_data = string.Empty;
string ENCRYPTED_DATA = AES_MODULE.AES_ENCRYPTION_DATA(data, CORE_MODULE.SERVER_SIDE_AES_KEY, CORE_MODULE.SERVER_SIDE_AES_IV);
CLIEINT_AES_KEYS obj = new CLIEINT_AES_KEYS();
obj.KEY = CORE_MODULE.SERVER_SIDE_AES_KEY;
obj.IV = CORE_MODULE.SERVER_SIDE_AES_IV;
string AES_ENCRYPTIN_KEY_PAIR = JsonConvert.SerializeObject(obj);
string RSA_ENCRYPTED_KEY_PAIR = RSA_MODULE.RSA_Encrypt(AES_ENCRYPTIN_KEY_PAIR, RSA_MODULE.server_side_public_key_generator());
final_data = RSA_ENCRYPTED_KEY_PAIR + "." + ENCRYPTED_DATA;
return(final_data);
}
catch (Exception ex)
{
throw new HttpResponseException(HttpStatusCode.BadRequest);
}
}
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);
}
}
//INITIALIZATION OF ALL METHODS
public static void Initialize(int KEY_LENGTH, string Audience = "", string Issuer = "")
{
//INITIALIZING KEY LENGTH
CORE_MODULE.KEY_LENGTH = KEY_LENGTH;
//GETTING PRIVATE KEY GENERATION FOR CLIENT SIDE PUBLIC KEY AND SERVER SIDE PRIVATE KEY
string RSA_SERVER_parameters = RSA_MODULE.server_side_random_private_key_generator();
//CREATION OF XML INSTANCE
XmlDocument server_xml_doc = new XmlDocument();
//LOADING STRING INTO XML
server_xml_doc.LoadXml(RSA_SERVER_parameters);
//SERILIZING XML DATA INTO JSON FORMAT
string server_jsosn_text = JsonConvert.SerializeXmlNode(server_xml_doc);
//deserialization of data using model
RSA_Conversion_Model server_obj = JsonConvert.DeserializeObject <RSA_Conversion_Model>(server_jsosn_text);
//setting parameters into server rsa parameter variables
SERVER_EXPONENT = server_obj.RSAParameters.Exponent;
SERVER_MODULES = server_obj.RSAParameters.Modulus;
SERVER_P = server_obj.RSAParameters.P;
SERVER_Q = server_obj.RSAParameters.Q;
SERVER_D = server_obj.RSAParameters.D;
SERVER_DP = server_obj.RSAParameters.DP;
SERVER_DQ = server_obj.RSAParameters.DQ;
SERVER_INVERSE_Q = server_obj.RSAParameters.InverseQ;
//GETTING PRIVATE KEY GENERATION FOR SERVER SIDE PUBLIC KEY AND CLIENT SIDE PRIVATE KEY
string RSA_CLIENT_parameters = RSA_MODULE.server_side_random_private_key_generator();
//CREATION OF XML INSTANCE
XmlDocument client_xml_doc = new XmlDocument();
//LOADING STRING INTO XML
client_xml_doc.LoadXml(RSA_CLIENT_parameters);
//SERILIZING XML DATA INTO JSON FORMAT
string client_jsosn_text = JsonConvert.SerializeXmlNode(client_xml_doc);
RSA_Conversion_Model client_obj = JsonConvert.DeserializeObject <RSA_Conversion_Model>(client_jsosn_text);
//setting parameters into client rsa parameter variables
CLIENT_EXPONENT = client_obj.RSAParameters.Exponent;
CLIENT_MODULES = client_obj.RSAParameters.Modulus;
CLIENT_P = client_obj.RSAParameters.P;
CLIENT_Q = client_obj.RSAParameters.Q;
CLIENT_D = client_obj.RSAParameters.D;
CLIENT_DP = client_obj.RSAParameters.DP;
CLIENT_DQ = client_obj.RSAParameters.DQ;
CLIENT_INVERSE_Q = client_obj.RSAParameters.InverseQ;
//Unique number assigning as a key for AES_KEY and IV values of both SERVER SIDE AES and TOKEN Generation
SERVER_SIDE_AES_KEY = EDITIONAL_METHODS.unique_code_generator(16);
SERVER_SIDE_AES_IV = EDITIONAL_METHODS.unique_code_generator(16);
TOKEN_AES_KEY = EDITIONAL_METHODS.unique_code_generator(16);
TOKEN_AES_IV = EDITIONAL_METHODS.unique_code_generator(16);
try
{
//Adding add responses to final response and assigning values
Response_Dictionary = new Dictionary <string, string>();
roles = new List <string>();
token_issuer = Issuer;
token_audience = Audience;
}
catch (Exception ex)
{
throw new HttpResponseException(HttpStatusCode.BadRequest);
}
}
