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/*
* Copyright (C) 2014 MongoDB 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.
*/
#include "mongo/db/auth/sasl_plain_server_conversation.h"
#include "mongo/crypto/mechanism_scram.h"
#include "mongo/db/auth/sasl_authentication_session.h"
#include "mongo/util/base64.h"
#include "mongo/util/password_digest.h"
#include "mongo/util/text.h"
namespace mongo {
SaslPLAINServerConversation::SaslPLAINServerConversation(SaslAuthenticationSession* saslAuthSession)
: SaslServerConversation(saslAuthSession) {}
SaslPLAINServerConversation::~SaslPLAINServerConversation(){};
StatusWith<bool> SaslPLAINServerConversation::step(StringData inputData, std::string* outputData) {
// Expecting user input on the form: user\0user\0pwd
std::string input = inputData.toString();
std::string pwd = "";
try {
_user = input.substr(0, inputData.find('\0'));
pwd = input.substr(inputData.find('\0', _user.size() + 1) + 1);
} catch (std::out_of_range& exception) {
return StatusWith<bool>(ErrorCodes::AuthenticationFailed,
mongoutils::str::stream()
<< "Incorrectly formatted PLAIN client message");
}
User* userObj;
// The authentication database is also the source database for the user.
Status status =
_saslAuthSession->getAuthorizationSession()->getAuthorizationManager().acquireUser(
_saslAuthSession->getOpCtxt(),
UserName(_user, _saslAuthSession->getAuthenticationDatabase()),
&userObj);
if (!status.isOK()) {
return StatusWith<bool>(status);
}
const User::CredentialData creds = userObj->getCredentials();
_saslAuthSession->getAuthorizationSession()->getAuthorizationManager().releaseUser(userObj);
std::string authDigest = createPasswordDigest(_user, pwd);
if (!creds.password.empty()) {
// Handle schemaVersion26Final (MONGODB-CR/SCRAM mixed mode)
if (authDigest != creds.password) {
return StatusWith<bool>(ErrorCodes::AuthenticationFailed,
mongoutils::str::stream() << "Incorrect user name or password");
}
} else {
// Handle schemaVersion28SCRAM (SCRAM only mode)
unsigned char storedKey[scram::hashSize];
unsigned char serverKey[scram::hashSize];
scram::generateSecrets(
authDigest,
reinterpret_cast<const unsigned char*>(base64::decode(creds.scram.salt).c_str()),
16,
creds.scram.iterationCount,
storedKey,
serverKey);
if (creds.scram.storedKey !=
base64::encode(reinterpret_cast<const char*>(storedKey), scram::hashSize)) {
return StatusWith<bool>(ErrorCodes::AuthenticationFailed,
mongoutils::str::stream() << "Incorrect user name or password");
}
}
*outputData = "";
return StatusWith<bool>(true);
}
} // namespace mongo
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