public override int GetHashCode()
{
unchecked {
return(((FIO != null ? FIO.GetHashCode() : 0) * 397) ^
(Pseudonym != null ? Pseudonym.GetHashCode() : 0));
}
}
/**
* Get an encrypted pseudonym for a user from the database.
* @param user the User ID to get a encrypted pseudonym for.
* @param sp the SP ID to get a encrypted pseudonym for.
* @return The encrypted pseudonym for the specified user and SP, or null if no encrypted pseudonym was found in the database.
*/
public Pseudonym GetEncrypted(string user, string sp)
{
var pseudonyms = from ep in db.EncryptedPseudonyms
where ep.user == user && ep.sp == sp
select Pseudonym.Decode(ep.pseudonym);
return(pseudonyms.FirstOrDefault());
}
/**
* Get a polymorphic pseudonym for a user from the database.
* @param user the User ID to get a polymorphic pseudonym for.
* @return The polymorphic pseudonym for the specified user, or null if no polymorphic pseudonym was found in the database.
*/
public Pseudonym GetPolymorphic(string user)
{
var pseudonyms = from p in db.PolymorphicPseudonyms
where p.user == user
select Pseudonym.Decode(p.pseudonym);
return(pseudonyms.FirstOrDefault());
}
/**
* Get an encrypted pseudonym asynchronously.
* @param pp The polymorphic pseudonym to get an encrypted pseudonym for.
* @param sp The SP ID to get an encrypted pseudonym for.
* @return A task that will result in the Encrypted Pseudonym.
*/
public async Task <Pseudonym> GetEPAsync(Pseudonym pp, string sp)
{
HttpClient client = new HttpClient();
HttpResponseMessage message = await client.GetAsync(string.Format(url,
WebUtility.UrlEncode(pp.Encode()), WebUtility.UrlEncode(sp)));
string epString = await message.Content.ReadAsStringAsync();
return(Pseudonym.Decode(epString));
}
/**
* Store a polymorphic pseudonym in the database.
* @param user The User ID to store the polymorphic pseudonym for.
* @param pp The polymorphic pseudonym to store.
*/
public void AddPolymorphic(string user, Pseudonym pp)
{
PolymorphicPseudonym pseudonym = new PolymorphicPseudonym();
pseudonym.user = user;
pseudonym.pseudonym = pp.Encode();
pseudonym.id = System.Guid.NewGuid();
db.PolymorphicPseudonyms.InsertOnSubmit(pseudonym);
db.SubmitChanges();
}
/**
* Execute the <code>randomize</code> query
* @return 2D array <code>result</code> with <code>result[0][0]</code> being the encoded randomized pseudonym.
*/
public string[][] Randomize()
{
string[] oneResult = new string[1];
Pseudonym pseudonym = Pseudonym.Decode(parameters[0]);
pseudonym = pseudonym.Randomize();
oneResult[0] = pseudonym.Encode();
return(new string[][] { oneResult });
}
/**
* Store a encrypted pseudonym in the database.
* @param user The User ID to store the encrypted pseudonym for.
* @param sp the SP ID to store the encrypted pseudonym for.
* @param ep The encrypted pseudonym to store.
*/
public void AddEncrypted(string user, string sp, Pseudonym ep)
{
EncryptedPseudonym pseudonym = new EncryptedPseudonym();
pseudonym.user = user;
pseudonym.sp = sp;
pseudonym.pseudonym = ep.Encode();
pseudonym.id = System.Guid.NewGuid();
db.EncryptedPseudonyms.InsertOnSubmit(pseudonym);
db.SubmitChanges();
}
/**
* Execute the <code>getEP</code> query
* @return 2D array <code>result</code> with <code>result[0][0]</code> being the encoded encrypted pseudonym.
*/
public string[][] GetEP()
{
Pseudonym ep = db.GetEncrypted(parameters[INDEX_UID], parameters[INDEX_SP]);
if (ep == null)
{
Pseudonym pp = GetPolymorphicPseudonym();
ep = pseudonymProvider.GetEPAsync(pp, parameters[INDEX_SP]).Result;
db.AddEncrypted(parameters[INDEX_UID], parameters[INDEX_SP], ep);
}
return(new string[][] { new string[] { ep.Encode() } });
}
/**
* Get a polymorphic pseudonym from the database, or create one if it does not yet exist.
* @param return The polymorphic pseudonym for the User ID in parameters[0]
*/
private Pseudonym GetPolymorphicPseudonym()
{
Pseudonym pp = db.GetPolymorphic(parameters[INDEX_UID]);
if (pp == null)
{
IdP idp = new IdP(SystemParams.Curve.DecodePoint(Convert.FromBase64String(y_k)));
pp = idp.GeneratePolymorphicPseudonym(parameters[INDEX_UID]);
db.AddPolymorphic(parameters[INDEX_UID], pp);
}
return(pp);
}
