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/**
* Copyright (C) 2014 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <string>
#include "mongo/base/status.h"
#include "mongo/db/jsobj.h"
namespace mongo {
namespace scram {
const unsigned int hashSize = 20;
const std::string serverKeyConst = "Server Key";
const std::string clientKeyConst = "Client Key";
const std::string iterationCountFieldName = "iterationCount";
const std::string saltFieldName = "salt";
const std::string storedKeyFieldName = "storedKey";
const std::string serverKeyFieldName = "serverKey";
/*
* Computes the SaltedPassword from password, salt and iterationCount.
*/
void generateSaltedPassword(const StringData& hashedPassword,
const unsigned char* salt,
const int saltLen,
const int iterationCount,
unsigned char saltedPassword[hashSize]);
/*
* Computes the SCRAM secrets storedKey and serverKey using the salt 'salt'
* and iteration count 'iterationCount' as defined in RFC5802 (server side).
*/
void generateSecrets(const std::string& hashedPassword,
const unsigned char salt[],
size_t saltLen,
size_t iterationCount,
unsigned char storedKey[hashSize],
unsigned char serverKey[hashSize]);
/*
* Generates the user salt and the SCRAM secrets storedKey and serverKey as
* defined in RFC5802 (server side).
*/
BSONObj generateCredentials(const std::string& hashedPassword);
/*
* Computes the ClientProof from SaltedPassword and authMessage (client side).
*/
std::string generateClientProof(const unsigned char saltedPassword[hashSize],
const std::string& authMessage);
/*
* Validates that the provided password 'hashedPassword' generates the serverKey
* 'serverKey' given iteration count 'iterationCount' and salt 'salt'.
*/
bool validatePassword(const std::string& hashedPassword,
int iterationCount,
const std::string& salt,
const std::string& storedKey);
/*
* Verifies ServerSignature (client side).
*/
bool verifyServerSignature(const unsigned char saltedPassword[hashSize],
const std::string& authMessage,
const std::string& serverSignature);
} // namespace scram
} // namespace mongo
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