private PasswordHistory <UsernamePassword> ToHistory(string payload)
{
PasswordHistory <UsernamePassword> tmp = new PasswordHistory <UsernamePassword>();
StringBuilder sb = new StringBuilder();
char prev = ' ';
string user = null;
foreach (char cur in payload)
{
if (cur != escape && cur != sep)
{
sb.Append(cur);
prev = cur;
}
else
{
if (cur == escape)
{
if (prev == escape)
{
sb.Append(cur);
prev = ' ';
}
else
{
prev = cur;
}
}
else //cur == sep
{
if (prev == escape) //literal
{
sb.Append(cur);
}
else //separation of items
{
if (user == null) //we're hitting the user separator
{
user = sb.ToString();
}
else //ok, we're at the end of a payload
{
tmp.Add(new UsernamePassword(user, sb.ToString()));
user = null;
}
sb.Clear();
}
prev = cur;
}
}
}
if (sb.Length > 0) //have to deal with the last element
{
tmp.Add(new UsernamePassword(user, sb.ToString()));
}
return(tmp);
}
public bool AddCredential(IUserIdentity user, Security.ICredential credential)
{
if (user != null && credential != null)
{
UserPasswordCredential up = credential as UserPasswordCredential; //this is the only type of credential we can use
if (up != null)
{
UsernamePassword hist = up.ToHistoryPair(); //this is what we store in history
if (UserPasswordProviderFactory.Instance.ComplexityChecker.IsValid(up.password)) //validate it meets complexity rules
{
//get the existing credential this will replace, or this may be all together new
PersistedCredential curCred = GetPersisted(user.Uid, hist.UserName);
if (curCred != null)
{
PasswordHistory <UsernamePassword> history = GetHistory(user.Uid, hist.UserName);
if (!history.MatchesHistory(UsernamePassword.Matches, hist)) //can't add this since it's matching a current history in range
{
history.Add(hist);
//delete and set the new password
if (ReplaceCredential(user.Uid, hist.UserName, hist.Password))
{
this.historyProvider.Update(user.Uid, history);
return(true);
}
}
}
else //no existing cred, so this is a new one - but already meets complexity rule
{
PasswordHistory <UsernamePassword> history = GetHistory(user.Uid, hist.UserName);
if (!history.MatchesHistory(UsernamePassword.Matches, hist)) //can't add this since it's matching a current history in range
{
history.Add(hist);
//delete and set the new password
if (this.storeProvider.AddCredential(user.Uid, this, hist.UserName, hist.Password)) //the hist is already salted
{
this.historyProvider.Update(user.Uid, history); //update the history
return(true);
}
}
}
} //inside this level we have a valid password by complexity
}
}
return(false);
}
public bool ReplaceCredential(IUserIdentity user, Security.ICredential existing, Security.ICredential proposed)
{
if (user != null && existing != null && proposed != null)
{
UserPasswordCredential toRemove = existing as UserPasswordCredential; //this is the only type of credential we can use
UserPasswordCredential toAdd = proposed as UserPasswordCredential; //this is the only type of credential we can use
if (toRemove != null && toAdd != null)
{
PersistedCredential cred = GetPersisted(user.Uid, toRemove.UserName.ToLowerInvariant());
if (cred != null && toRemove.Matches(cred)) //has to be currently valid to do a replace
{
UsernamePassword up = toAdd.ToHistoryPair();
if (toRemove.UserName.ToLowerInvariant().Equals(toAdd.UserName.ToLowerInvariant()))
{
PasswordHistory <UsernamePassword> hist = GetHistory(user.Uid, up.UserName);
if (!hist.MatchesHistory(UsernamePassword.Matches, up)) //check for historic collision
{
if (ReplaceCredential(user.Uid, up.UserName, up.Password))
{
hist.Add(up);
this.historyProvider.Update(user.Uid, hist);
return(true);
}
}
}
else //different usernames being used
{
if (this.storeProvider.DeleteCredential(user.Uid, this, toRemove.UserName.ToLowerInvariant()))
{
this.historyProvider.Delete(user.Uid); //TODO -- this we need to fix by userId,type
if (this.storeProvider.AddCredential(user.Uid, this, up.UserName, up.Password))
{
PasswordHistory <UsernamePassword> hist = GetHistory(user.Uid, up.UserName);
this.historyProvider.Update(user.Uid, hist);
return(true);
}
}
}
}
}
}
return(false);
}