function handleTallyReq($voterReq)
{
switch ($voterReq['cmd']) {
// TODO throw an error if cmd is not set
case 'getWinners':
$winners = array();
foreach ($this->elConfig['questions'] as $question) {
$completeElectionId = makeCompleteElectionId($this->elConfig['electionId'], $question['questionID']);
$pseudoVoterReq = array('electionId' => $completeElectionId);
$allvotesTmp = parent::getAllVotesEvent($pseudoVoterReq);
$allVotes = $allvotesTmp['data']['allVotes'];
$winners[$question['questionID']] = $this->GetResultMain($allVotes, $question['tallyData'], $question['options']);
}
$result = array('cmd' => 'showWinners', 'data' => $winners);
return $result;
break;
case 'getStatistic':
// get the array of questions from the requested questionId or return all questions
if (isset($voterReq['questionID'])) {
// return the result statistics for the requested question only
if (is_array($voterReq['questionID'])) {
$questionIds = $voterReq['questionID'];
} else {
$questionIds[] = $voterReq['questionID'];
}
// just a single question requested
foreach ($questionIds as $questionId) {
if (!(is_int($questionId) || is_string($questionId))) {
WrongRequestException::throwException(85657, 'The questionID must be an int, a string or an array of integers resp. strings', print_r($voterReq, true));
}
$key = find_in_subarray($this->elConfig['questions'], 'questionID', $questionId);
if ($key === false) {
WrongRequestException::throwException(85658, 'The questionID you requested does not exist', print_r($questionId, true));
}
$questions[] = $this->elConfig['questions'][$key];
}
} else {
$questions = $this->elConfig['questions'];
}
// return the result statistics for all questions
// generate statistics
$resultStat = array();
foreach ($questions as $question) {
$completeElectionId = makeCompleteElectionId($this->elConfig['electionId'], $question['questionID']);
$pseudoVoterReq = array('electionId' => $completeElectionId);
$allvotesTmp = parent::getAllVotesEvent($pseudoVoterReq);
$allVotes = $allvotesTmp['data']['allVotes'];
$allOptionIDs = $this->getAllOptionIDs($question['options']);
$resultStat[$question['questionID']] = $this->GetResultStat($allVotes, $allOptionIDs, $question['tallyData']['scheme']);
}
$result = array('cmd' => 'showStatistic', 'data' => $resultStat);
return $result;
break;
default:
return parent::handleTallyReq($voterReq);
break;
}
}
function verifyBallots($voterReq, $blindedHashesFromDB)
{
// $voterReq: .ballots[] .electionId .VoteId //.blindedHash[] .serversAlreadySigned[]
//contains an array saying the x-th server has to sign y ballots
// verify if user is allowed to vote and status of communication (done: pickBallots, next: signBallots) is correct
// verify content of the ballot
// verify if the correct number of ballots was sent: if (count($voterReq["ballots"]) != $this->numVerifyBallots) { WrongRequestException::throwException('not the correct number of ballots sent'); }
$tmpret = array();
if ($voterReq['electionId'] != $this->electionId) {
WrongRequestException::throwException(210, 'Error: electionID is wrong', "expected electionID: {$this->electionId}, received electionID in ballot {$i}: " . $voterReq['ballots'][$i]['electionId']);
}
if (!isset($voterReq['questions']) || !is_array($voterReq['questions'])) {
WrongRequestException::throwException(223, "Error: questions must be set and an array", print_r($voterReq, true));
}
for ($q = 0; $q < count($voterReq['questions']); $q++) {
if (!isset($voterReq["questions"][$q]['questionID']) || !(is_int($voterReq["questions"][$q]['questionID']) || is_string($voterReq["questions"][$q]['questionID']))) {
WrongRequestException::throwException(227, 'Error: verifyBallots(): missing questionID or it is not of type int', $q);
}
$qno = find_in_subarray($voterReq["questions"], 'questionID', $blindedHashesFromDB['blindedHashes']['questions'][$q]['questionID']);
if ($qno === false) {
WrongRequestException::throwException(237, 'Error: All questions must be disclosed', 'Number in question array for which no questionID was found in voterrequest: ' . $q);
}
if (!isset($voterReq['questions'][$q]['ballots']) || !is_array($voterReq['questions'][$q]['ballots'])) {
WrongRequestException::throwException(224, "/questions[].['ballots']/ must be set and of type array", print_r($voterReq, true));
}
foreach ($blindedHashesFromDB['requestedBallots']['questions'][$q]['picked'] as $p) {
$i = find_in_subarray($voterReq['questions'][$q]['ballots'], 'ballotno', $p);
if ($i === false) {
WrongRequestException::throwException(211, "A picked Ballot was not sent", "verifyBallots: not sent ballot: {$p}");
}
$curVoterBallot = $voterReq["questions"][$qno]["ballots"][$i];
if (!isset($curVoterBallot['unblindf']) || !is_string($curVoterBallot['unblindf'])) {
WrongRequestException::throwException(225, 'Error: /unblindf/ must be set and of type /string/', print_r($curVoterBallot, true));
}
// verify if the sent ballot was requested
// $kw = array_search($curVoterBallot['ballotno'], $blindedHashesFromDB['requestedBallots']['questions'][$q]['picked']);
// if ($kw === false) WrongRequestException::throwException(211, "A Ballot was sent for verification purpose that was not requested", "verifyBallots: not requested ballot: " . $voterReq['ballots'][$i]['ballotno'] . "requested ballots: " . print_r($blindedHashesFromDB['requestedBallots'], true));
// $requestedballots['sent'][$kw] = true;
// }
// verify hash
$str = $this->ballot2strForSig($curVoterBallot, makeCompleteElectionId($this->electionId, $blindedHashesFromDB['blindedHashes']['questions'][$q]['questionID']));
$blindedHashFromDatabase = $blindedHashesFromDB['blindedHashes']['questions'][$q]['ballots'][$curVoterBallot['ballotno']]['blindedHash'];
$unblindf = $curVoterBallot['unblindf'];
$hashOk = $this->crypt->verifyBlindedHash($str, $unblindf, $blindedHashFromDatabase);
if (!($hashOk === true)) {
WrongRequestException::throwException(212, "Error: hash wrong", "hash from signature: " . $verifyHash->toHex() . "calculated hash: {$hashByMe}");
}
// verify sigs from previous servers .ballots.sigs: .sig(encryptet previous sig or hash if first sig) .sigBy (name of the signing server in order to identify the correct public key)
$sigsOk = false;
if (isset($curVoterBallot['sigs'])) {
$sigsOk = $this->crypt->verifySigs($str, $curVoterBallot['sigs']);
} else {
$sigsOk = true;
}
// no sigs there
$tmpret[$i] = $hashOk === true && $sigsOk === true;
if ($i == 0) {
$ret = $tmpret[$i] === true;
} else {
$ret = $ret === true && $tmpret[$i] === true;
}
// TODO verify if votingId is unique
// load $allvotingno from database
// if (array_search($raw['votingno'], $allvotingno) == false) {$e = WrongRequestException::throwException... error("Voting number allocated"); return $e;}
//
}
// verify if all requested ballots were sent
/* for ($i=0; $i<count($requestedballots["num"]); $i++) {
if (! $requestedballots['sent']) {
$e = throwExeption...("Not all requested ballots were sent for verification. Ballots $requestedballots[num][$i] is missing.");
}
}
*/
// array($tmpret, $hashByMe, $unblindethashFromDatabaseStr);
if ($q == 0) {
$retQ = $ret;
} else {
$retQ = $retQ === true && $ret === true;
}
}
return $retQ;
}
