bool CmdAuthenticate::authenticateX509(const string& dbname,
BSONObj& cmdObj,
string& errmsg,
BSONObjBuilder& result) {
if(dbname != "$external") {
errmsg = "X.509 authentication must always use the $external database.";
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
std::string user = cmdObj.getStringField("user");
ClientBasic *client = ClientBasic::getCurrent();
AuthorizationSession* authorizationSession = client->getAuthorizationSession();
StringData subjectName = client->port()->getX509SubjectName();
if (user != subjectName) {
errmsg = "There is no x.509 client certificate matching the user.";
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
else {
StringData srvSubjectName = getSSLManager()->getSubjectName();
StringData srvClusterId = srvSubjectName.substr(0, srvSubjectName.find("/CN")+1);
StringData peerClusterId = subjectName.substr(0, subjectName.find("/CN")+1);
// Handle internal cluster member
if (srvClusterId == peerClusterId) {
authorizationSession->grantInternalAuthorization(UserName(user, "$external"));
}
// Handle normal client authentication
else {
Principal* principal = new Principal(UserName(user, "$external"));
principal->setImplicitPrivilegeAcquisition(true);
authorizationSession->addAuthorizedPrincipal(principal);
}
result.append( "dbname" , dbname );
result.append( "user" , user );
return true;
}
}
bool CmdAuthenticate::authenticateCR(const string& dbname,
BSONObj& cmdObj,
string& errmsg,
BSONObjBuilder& result) {
string user = cmdObj.getStringField("user");
if (!_areNonceAuthenticateCommandsEnabled) {
// SERVER-8461, MONGODB-CR must be enabled for authenticating the internal user, so that
// cluster members may communicate with each other.
if (dbname != StringData("local", StringData::LiteralTag()) ||
user != internalSecurity.user) {
errmsg = _nonceAuthenticateCommandsDisabledMessage;
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
}
string key = cmdObj.getStringField("key");
string received_nonce = cmdObj.getStringField("nonce");
if( user.empty() || key.empty() || received_nonce.empty() ) {
log() << "field missing/wrong type in received authenticate command "
<< dbname
<< endl;
errmsg = "auth fails";
sleepmillis(10);
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
stringstream digestBuilder;
{
bool reject = false;
ClientBasic *client = ClientBasic::getCurrent();
AuthenticationSession *session = client->getAuthenticationSession();
if (!session || session->getType() != AuthenticationSession::SESSION_TYPE_MONGO) {
reject = true;
LOG(1) << "auth: No pending nonce" << endl;
}
else {
nonce64 nonce = static_cast<MongoAuthenticationSession*>(session)->getNonce();
digestBuilder << hex << nonce;
reject = digestBuilder.str() != received_nonce;
if ( reject ) {
LOG(1) << "auth: Authentication failed for " << dbname << '$' << user << endl;
}
}
client->resetAuthenticationSession(NULL);
if ( reject ) {
log() << "auth: bad nonce received or getnonce not called. could be a driver bug or a security attack. db:" << dbname << endl;
errmsg = "auth fails";
sleepmillis(30);
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
}
BSONObj userObj;
string pwd;
Status status = getGlobalAuthorizationManager()->getPrivilegeDocument(
dbname, UserName(user, dbname), &userObj);
if (!status.isOK()) {
log() << status.reason() << std::endl;
errmsg = "auth fails";
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
pwd = userObj["pwd"].String();
md5digest d;
{
digestBuilder << user << pwd;
string done = digestBuilder.str();
md5_state_t st;
md5_init(&st);
md5_append(&st, (const md5_byte_t *) done.c_str(), done.size());
md5_finish(&st, d);
}
string computed = digestToString( d );
if ( key != computed ) {
log() << "auth: key mismatch " << user << ", ns:" << dbname << endl;
errmsg = "auth fails";
result.append(saslCommandCodeFieldName, ErrorCodes::AuthenticationFailed);
return false;
}
AuthorizationSession* authorizationSession =
ClientBasic::getCurrent()->getAuthorizationSession();
Principal* principal = new Principal(UserName(user, dbname));
principal->setImplicitPrivilegeAcquisition(true);
authorizationSession->addAuthorizedPrincipal(principal);
result.append( "dbname" , dbname );
result.append( "user" , user );
return true;
}
