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/* Copyright 2015 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kAccessControl
#include "mongo/platform/basic.h"
#include "mongo/client/authenticate.h"
#include "mongo/bson/json.h"
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/client/sasl_client_authenticate.h"
#include "mongo/config.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/util/net/ssl_manager.h"
#include "mongo/util/net/ssl_options.h"
#include "mongo/util/password_digest.h"
namespace mongo {
namespace auth {
using executor::RemoteCommandRequest;
using executor::RemoteCommandResponse;
namespace {
// TODO: These constants need to be cleaned up.
const char* const saslCommandUserSourceFieldName = "userSource";
const BSONObj getnoncecmdobj = fromjson("{getnonce:1}");
bool isOk(const BSONObj& o) {
return getStatusFromCommandResult(o).isOK();
}
BSONObj getFallbackAuthParams(const BSONObj& params) {
if (params["fallbackParams"].type() != Object) {
return BSONObj();
}
return params["fallbackParams"].Obj();
}
// Use the MONGODB-CR protocol to authenticate as "username" against the database "dbname",
// with the given password. If digestPassword is false, the password is assumed to be
// pre-digested. Returns false on failure, and sets "errmsg".
bool authMongoCR(RunCommandHook runCommand,
StringData dbname,
StringData username,
StringData password_text,
BSONObj* info,
bool digestPassword) {
auto request = RemoteCommandRequest();
request.cmdObj = getnoncecmdobj;
request.dbname = dbname.toString();
std::string password = password_text.toString();
if (digestPassword)
password = createPasswordDigest(username, password_text);
std::string nonce;
invariant(info != nullptr && runCommand);
auto runCommandHandler = [&info](StatusWith<RemoteCommandResponse> response) {
*info = response.getValue().data.getOwned();
};
runCommand(request, runCommandHandler);
if (!isOk(*info)) {
return false;
}
{
BSONElement e = info->getField("nonce");
verify(e.type() == String);
nonce = e.valuestr();
}
BSONObjBuilder b;
{
b << "authenticate" << 1 << "nonce" << nonce << "user" << username;
md5digest d;
{
md5_state_t st;
md5_init(&st);
md5_append(&st, (const md5_byte_t*)nonce.c_str(), nonce.size());
md5_append(&st, (const md5_byte_t*)username.rawData(), username.size());
md5_append(&st, (const md5_byte_t*)password.c_str(), password.size());
md5_finish(&st, d);
}
b << "key" << digestToString(d);
request.cmdObj = b.done();
}
runCommand(request, runCommandHandler);
return isOk(*info);
}
// Use the MONGODB-X509 protocol to authenticate as "username." The certificate details
// has already been communicated automatically as part of the connect call.
// Returns false on failure and set "errmsg".
bool authX509(RunCommandHook runCommand, StringData dbname, StringData username, BSONObj* info) {
BSONObjBuilder cmdBuilder;
cmdBuilder << "authenticate" << 1 << "mechanism"
<< "MONGODB-X509"
<< "user" << username;
auto request = RemoteCommandRequest();
request.dbname = dbname.toString();
request.cmdObj = cmdBuilder.done();
runCommand(request,
[&info](StatusWith<RemoteCommandResponse> response) {
*info = response.getValue().data.getOwned();
});
return isOk(*info);
}
void auth(RunCommandHook runCommand,
const BSONObj& params,
StringData hostname,
StringData clientName) {
std::string mechanism;
uassertStatusOK(bsonExtractStringField(params, saslCommandMechanismFieldName, &mechanism));
uassert(17232,
"You cannot specify both 'db' and 'userSource'. Please use only 'db'.",
!(params.hasField(saslCommandUserDBFieldName) &&
params.hasField(saslCommandUserSourceFieldName)));
if (mechanism == StringData("MONGODB-CR", StringData::LiteralTag())) {
std::string db;
if (params.hasField(saslCommandUserSourceFieldName)) {
uassertStatusOK(bsonExtractStringField(params, saslCommandUserSourceFieldName, &db));
} else {
uassertStatusOK(bsonExtractStringField(params, saslCommandUserDBFieldName, &db));
}
std::string user;
uassertStatusOK(bsonExtractStringField(params, saslCommandUserFieldName, &user));
std::string password;
uassertStatusOK(bsonExtractStringField(params, saslCommandPasswordFieldName, &password));
bool digestPassword;
uassertStatusOK(bsonExtractBooleanFieldWithDefault(
params, saslCommandDigestPasswordFieldName, true, &digestPassword));
BSONObj result;
uassert(result["code"].Int(),
result.toString(),
authMongoCR(runCommand, db, user, password, &result, digestPassword));
}
#ifdef MONGO_CONFIG_SSL
else if (mechanism == StringData("MONGODB-X509", StringData::LiteralTag())) {
std::string db;
if (params.hasField(saslCommandUserSourceFieldName)) {
uassertStatusOK(bsonExtractStringField(params, saslCommandUserSourceFieldName, &db));
} else {
uassertStatusOK(bsonExtractStringField(params, saslCommandUserDBFieldName, &db));
}
std::string user;
uassertStatusOK(bsonExtractStringField(params, saslCommandUserFieldName, &user));
uassert(ErrorCodes::AuthenticationFailed,
"Please enable SSL on the client-side to use the MONGODB-X509 "
"authentication mechanism.",
clientName.toString() != "");
uassert(ErrorCodes::AuthenticationFailed,
"Username \"" + user + "\" does not match the provided client certificate user \"" +
clientName.toString() + "\"",
user == clientName.toString());
BSONObj result;
uassert(result["code"].Int(), result.toString(), authX509(runCommand, db, user, &result));
}
#endif
else if (saslClientAuthenticate != nullptr) {
uassertStatusOK(saslClientAuthenticate(runCommand, hostname, params));
} else {
uasserted(ErrorCodes::BadValue,
mechanism + " mechanism support not compiled into client library.");
}
};
} // namespace
void authenticateClient(const BSONObj& params,
StringData hostname,
StringData clientName,
RunCommandHook runCommand) {
try {
auth(runCommand, params, hostname, clientName);
return;
} catch (const UserException& ex) {
if (getFallbackAuthParams(params).isEmpty() ||
(ex.getCode() != ErrorCodes::BadValue && ex.getCode() != ErrorCodes::CommandNotFound)) {
throw ex;
}
}
// BadValue or CommandNotFound indicates unsupported auth mechanism so fall back to
// MONGODB-CR for 2.6 compatibility.
auth(runCommand, getFallbackAuthParams(params), hostname, clientName);
}
BSONObj buildAuthParams(StringData dbname,
StringData username,
StringData passwordText,
bool digestPassword) {
return BSON(saslCommandMechanismFieldName
<< "SCRAM-SHA-1" << saslCommandUserDBFieldName << dbname << saslCommandUserFieldName
<< username << saslCommandPasswordFieldName << passwordText
<< saslCommandDigestPasswordFieldName << digestPassword);
}
StringData getSaslCommandUserDBFieldName() {
return saslCommandUserDBFieldName;
}
StringData getSaslCommandUserFieldName() {
return saslCommandUserFieldName;
}
} // namespace auth
} // namespace mongo
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