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// security_commands.cpp
// security.cpp links with both dbgrid and db. this file db only -- at least for now.
// security.cpp
#include "stdafx.h"
#include "security.h"
#include "../util/md5.hpp"
#include "json.h"
#include "pdfile.h"
#include "db.h"
#include "dbhelpers.h"
#include "commands.h"
#include "jsobj.h"
namespace mongo {
/* authentication
system.users contains
{ user : <username>, pwd : <pwd_digest>, ... }
getnonce sends nonce to client
client then sends { authenticate:1, nonce:<nonce_str>, user:<username>, key:<key> }
where <key> is md5(<nonce_str><username><pwd_digest_str>) as a string
*/
boost::thread_specific_ptr<nonce> lastNonce;
class CmdGetNonce : public Command {
public:
virtual bool requiresAuth() { return false; }
virtual bool logTheOp() {
return false;
}
virtual bool slaveOk() {
return true;
}
CmdGetNonce() : Command("getnonce") {}
bool run(const char *ns, BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
nonce *n = new nonce(security.getNonce());
stringstream ss;
ss << hex << *n;
result.append("nonce", ss.str() );
lastNonce.reset(n);
return true;
}
} cmdGetNonce;
class CmdLogout : public Command {
public:
virtual bool logTheOp() {
return false;
}
virtual bool slaveOk() {
return true;
}
CmdLogout() : Command("logout") {}
bool run(const char *ns, BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
// database->name is the one we are logging out...
AuthenticationInfo *ai = authInfo.get();
assert( ai );
ai->logout(database->name.c_str());
return true;
}
} cmdLogout;
class CmdAuthenticate : public Command {
public:
virtual bool requiresAuth() { return false; }
virtual bool logTheOp() {
return false;
}
virtual bool slaveOk() {
return true;
}
CmdAuthenticate() : Command("authenticate") {}
bool run(const char *ns, BSONObj& cmdObj, string& errmsg, BSONObjBuilder& result, bool fromRepl) {
log(1) << " authenticate: " << cmdObj << endl;
string user = cmdObj.getStringField("user");
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 " << database->name << '\n'; log() << "field missing/wrong type in received authenticate command " << database->name << '\n';
errmsg = "auth fails";
sleepmillis(10);
return false;
}
stringstream digestBuilder;
{
nonce *ln = lastNonce.release();
digestBuilder << hex << *ln;
if( ln == 0 || digestBuilder.str() != received_nonce ) {
log() << "auth: bad nonce received. could be a driver bug or a security attack. db:" << database->name << '\n'; log() << "field missing/wr " << database->name << '\n';
errmsg = "auth fails";
sleepmillis(30);
return false;
}
}
static BSONObj userPattern = fromjson("{\"user\":1}");
string systemUsers = database->name + ".system.users";
OCCASIONALLY Helpers::ensureIndex(systemUsers.c_str(), userPattern, "user_1");
BSONObj userObj;
{
BSONObjBuilder b;
b << "user" << user;
BSONObj query = b.done();
if( !Helpers::findOne(systemUsers.c_str(), query, userObj) ) {
log() << "auth: couldn't find user " << user << ", " << systemUsers << '\n';
errmsg = "auth fails";
return false;
}
}
md5digest d;
{
string pwd = userObj.getStringField("pwd");
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:" << ns << '\n';
errmsg = "auth fails";
return false;
}
AuthenticationInfo *ai = authInfo.get();
assert( ai );
ai->authorize(database->name.c_str());
return true;
}
} cmdAuthenticate;
} // namespace mongo
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