// This handler is called when a client wishes to write files from the
// transferd's storage.
int
TransferD::write_files_handler(int cmd, Stream *sock)
{
ReliSock *rsock = (ReliSock*)sock;
MyString capability;
int protocol = FTP_UNKNOWN;
TransferRequest *treq = NULL;
MyString fquser;
static int transfer_reaper_id = -1;
ThreadArg *thread_arg;
int tid;
ClassAd reqad;
ClassAd respad;
cmd = cmd; // quiet the compiler.
dprintf(D_ALWAYS, "Got TRANSFERD_WRITE_FILES!\n");
/////////////////////////////////////////////////////////////////////////
// make sure we are authenticated
/////////////////////////////////////////////////////////////////////////
if( ! rsock->triedAuthentication() ) {
CondorError errstack;
if( ! SecMan::authenticate_sock(rsock, WRITE, &errstack) ) {
// we failed to authenticate, we should bail out now
// since we don't know what user is trying to perform
// this action.
// TODO: it'd be nice to print out what failed, but we
// need better error propagation for that...
errstack.push( "TransferD::setup_transfer_request_handler()", 42,
"Failure to register transferd - Authentication failed" );
dprintf( D_ALWAYS, "setup_transfer_request_handler() "
"aborting: %s\n",
errstack.getFullText() );
refuse( rsock );
return CLOSE_STREAM;
}
}
fquser = rsock->getFullyQualifiedUser();
/////////////////////////////////////////////////////////////////////////
// Check to see if the capability the client tells us is something that
// we have knowledge of. We ONLY check the capability and not the
// identity of the person in question. This allows people of different
// identities to write files here as long as they had the right
// capability. While this might not sound secure, they STILL had to have
// authenticated as someone this daemon trusts.
// Similarly, check the protocol it wants to use as well as ensure that
// the direction the transfer request was supposed to be is being honored.
/////////////////////////////////////////////////////////////////////////
rsock->decode();
// soak the request ad from the client about what it wants to transfer
reqad.initFromStream(*rsock);
rsock->end_of_message();
reqad.LookupString(ATTR_TREQ_CAPABILITY, capability);
rsock->encode();
// do I know of such a capability?
if (m_treqs.lookup(capability, treq) != 0) {
// didn't find it. Log it and tell them to leave and close up shop
respad.Assign(ATTR_TREQ_INVALID_REQUEST, TRUE);
respad.Assign(ATTR_TREQ_INVALID_REASON, "Invalid capability!");
respad.put(*rsock);
rsock->end_of_message();
dprintf(D_ALWAYS, "Client identity '%s' tried to write some files "
"using capability '%s', but there was no such capability. "
"Access denied.\n", fquser.Value(), capability.Value());
return CLOSE_STREAM;
}
reqad.LookupInteger(ATTR_TREQ_FTP, protocol);
// am I willing to use this protocol?
switch(protocol) {
case FTP_CFTP: // FileTrans protocol, I'm happy.
break;
default:
respad.Assign(ATTR_TREQ_INVALID_REQUEST, TRUE);
respad.Assign(ATTR_TREQ_INVALID_REASON,
"Invalid file transfer protocol!");
respad.put(*rsock);
rsock->end_of_message();
dprintf(D_ALWAYS, "Client identity '%s' tried to write some files "
"using protocol '%d', but I don't support that protocol. "
"Access denied.\n", fquser.Value(), protocol);
return CLOSE_STREAM;
}
// nsure that this transfer request was of the uploading variety
if (treq->get_direction() != FTPD_UPLOAD) {
respad.Assign(ATTR_TREQ_INVALID_REQUEST, TRUE);
respad.Assign(ATTR_TREQ_INVALID_REASON,
"Transfer Request was not an uploading request!");
respad.put(*rsock);
rsock->end_of_message();
dprintf(D_ALWAYS, "Client identity '%s' tried to write some files "
"to a transfer request that wasn't expecting to be written. "
"Access denied.\n", fquser.Value());
}
/////////////////////////////////////////////////////////////////////////
// Tell the client everything was ok.
/////////////////////////////////////////////////////////////////////////
respad.Assign(ATTR_TREQ_INVALID_REQUEST, FALSE);
respad.put(*rsock);
rsock->end_of_message();
/////////////////////////////////////////////////////////////////////////
// Set up a thread (a process under unix) to read ALL of the job files
// for all of the ads in the TransferRequest.
/////////////////////////////////////////////////////////////////////////
// now create a thread, passing in the sock, which uses the file transfer
// object to accept the files.
if (transfer_reaper_id == -1) {
// only set this up ONCE so each and every thread gets one.
transfer_reaper_id = daemonCore->Register_Reaper(
"write_files_reaper",
(ReaperHandlercpp) &TransferD::write_files_reaper,
"write_files_reaper",
this
);
}
thread_arg = new ThreadArg(protocol, treq);
// Start a new thread (process on Unix) to do the work
tid = daemonCore->Create_Thread(
(ThreadStartFunc)&TransferD::write_files_thread,
(void *)thread_arg,
rsock,
transfer_reaper_id
);
if (tid == FALSE) {
// XXX How do I handle this failure?
}
// associate the tid with the request so I can deal with it propery in
// the reaper
m_client_to_transferd_threads.insert(tid, treq);
// The stream is inherited to the thread, who does the transfer and
// finishes the protocol, but in the parent, I'm closing it.
return CLOSE_STREAM;
}
int
store_cred_handler(Service * /*service*/, int /*i*/, Stream *stream) {
void * data = NULL;
int rtnVal = FALSE;
int rc;
char * temp_file_name = NULL;
bool found_cred;
CredentialWrapper * temp_cred = NULL;
int data_size = -1;
classad::ClassAd * _classad = NULL;
classad::ClassAd classad;
std::string classad_cstr;
char * classad_str = NULL;
classad::ClassAdParser parser;
ReliSock * socket = (ReliSock*)stream;
const char * user = NULL;
CredentialWrapper * cred_wrapper = NULL;
if (!socket->triedAuthentication()) {
CondorError errstack;
if( ! SecMan::authenticate_sock(socket, WRITE, &errstack) ) {
dprintf (D_ALWAYS, "Unable to authenticate, qutting\n");
goto EXIT;
}
}
user = socket->getFullyQualifiedUser();
dprintf (D_FULLDEBUG, "Request by: %s, %s\n", socket->getOwner(), user);
socket->decode();
if (!socket->code (classad_str)) {
dprintf (D_ALWAYS, "Error receiving credential metadata\n");
goto EXIT;
}
classad_cstr = classad_str;
free (classad_str);
_classad = parser.ParseClassAd(classad_cstr);
if (!_classad) {
dprintf (D_ALWAYS, "Error: invalid credential metadata %s\n", classad_cstr.c_str());
goto EXIT;
}
classad = *_classad;
delete _classad;
int type;
if (!classad.EvaluateAttrInt ("Type", type)) {
dprintf (D_ALWAYS, "Missing Type attribute in classad!\n");
goto EXIT;
}
if (type == X509_CREDENTIAL_TYPE) {
cred_wrapper = new X509CredentialWrapper (classad);
dprintf (D_ALWAYS, "Name=%s Size=%d\n",
cred_wrapper->cred->GetName(),
cred_wrapper->cred->GetDataSize());
} else {
dprintf (D_ALWAYS, "Unsupported credential type %d\n", type);
goto EXIT;
}
cred_wrapper->cred->SetOrigOwner (socket->getOwner()); // original remote uname
cred_wrapper->cred->SetOwner (user); // mapped uname
// Receive credential data
data_size = cred_wrapper->cred->GetDataSize();
if (data_size > MAX_CRED_DATA_SIZE) {
dprintf (D_ALWAYS, "ERROR: Credential data size %d > maximum allowed (%d)\n", data_size, MAX_CRED_DATA_SIZE);
goto EXIT;
}
data = malloc (data_size);
if (data == NULL) {
EXCEPT("Out of memory. Aborting.");
}
if (!socket->code_bytes(data,data_size)) {
dprintf (D_ALWAYS, "Error receiving credential data\n");
goto EXIT;
}
cred_wrapper->cred->SetData (data, data_size);
// Check whether credential under this name already exists
found_cred=false;
credentials.Rewind();
while (credentials.Next(temp_cred)) {
if ((strcmp(cred_wrapper->cred->GetName(),
temp_cred->cred->GetName()) == 0) &&
(strcmp(cred_wrapper->cred->GetOwner(),
temp_cred->cred->GetOwner()) == 0)) {
found_cred=true;
break; // found it
}
}
if (found_cred) {
dprintf (D_ALWAYS, "Credential %s for owner %s already exists!\n",
cred_wrapper->cred->GetName(),
cred_wrapper->cred->GetOwner());
socket->encode();
int rcred=CREDD_ERROR_CREDENTIAL_ALREADY_EXISTS;
socket->code(rcred);
goto EXIT;
}
// Write data to a file
temp_file_name = dircat (cred_store_dir, "credXXXXXX");
condor_mkstemp (temp_file_name);
cred_wrapper->SetStorageName (temp_file_name);
init_user_id_from_FQN (user);
if (!StoreData(temp_file_name,data,data_size)) {
socket->encode();
int rcred = CREDD_UNABLE_TO_STORE;
socket->code(rcred);
goto EXIT;
}
((X509CredentialWrapper*)cred_wrapper)->cred->SetRealExpirationTime (
x509_proxy_expiration_time(temp_file_name));
// Write metadata to a file
credentials.Append (cred_wrapper);
SaveCredentialList();
// Write response to the client
socket->encode();
rc = CREDD_SUCCESS;
socket->code(rc);
dprintf( D_ALWAYS, "Credential name %s owner %s successfully stored\n",
cred_wrapper->cred->GetName(), cred_wrapper->cred->GetOwner() );
if (type == X509_CREDENTIAL_TYPE) {
((X509Credential*)cred_wrapper->cred)->display( D_FULLDEBUG );
}
rtnVal = TRUE;
EXIT:
if ( data != NULL ) {
free (data);
}
if ( temp_file_name != NULL ) {
delete [] temp_file_name;
}
if ( cred_wrapper != NULL) {
delete cred_wrapper;
}
return rtnVal;
}
int
query_cred_handler(Service * /*service*/, int /*i*/, Stream *stream) {
classad::ClassAdUnParser unparser;
std::string adbuffer;
char * request = NULL;
int rtnVal = FALSE;
int length;
CredentialWrapper * cred = NULL;
SimpleList <Credential*> result_list;
ReliSock * socket = (ReliSock*)stream;
const char * user;
if (!socket->triedAuthentication()) {
CondorError errstack;
if( ! SecMan::authenticate_sock(socket, READ, &errstack) ) {
dprintf (D_ALWAYS, "Unable to authenticate, qutting\n");
goto EXIT;
}
}
user = socket->getFullyQualifiedUser();
dprintf (D_ALWAYS, "Authenticated as %s\n", user);
socket->decode();
if (!socket->code(request)) {
dprintf (D_ALWAYS, "Error receiving request\n");
goto EXIT;
}
if ((request != NULL) && (strcmp (request, "*") == 0)) {
if (!isSuperUser (user)) {
dprintf (D_ALWAYS, "User %s is NOT super user, request DENIED\n", user);
goto EXIT;
}
}
// Find credentials for this user
credentials.Rewind();
while (credentials.Next(cred)) {
if (cred->cred->GetType() == X509_CREDENTIAL_TYPE) {
if (strcmp(cred->cred->GetOwner(), user) == 0) {
result_list.Append (cred->cred);
}
}
}
socket->encode();
length = result_list.Length();
dprintf (D_FULLDEBUG, "User has %d credentials\n", length);
socket->code (length);
Credential * _cred;
result_list.Rewind();
while (result_list.Next(_cred)) {
classad::ClassAd * _temp = cred->GetMetadata();
unparser.Unparse(adbuffer,_temp);
char * classad_str = strdup(adbuffer.c_str());
socket->code (classad_str);
free (classad_str);
delete _temp;
}
rtnVal = TRUE;
EXIT:
if (request != NULL) {
free (request);
}
return rtnVal;
}
int
rm_cred_handler(Service * /*service*/, int /*i*/, Stream *stream) {
char * name = NULL;
int rtnVal = FALSE;
int rc;
bool found_cred;
CredentialWrapper * cred_wrapper = NULL;
char * owner = NULL;
const char * user;
ReliSock * socket = (ReliSock*)stream;
if (!socket->triedAuthentication()) {
CondorError errstack;
if( ! SecMan::authenticate_sock(socket, READ, &errstack) ) {
dprintf (D_ALWAYS, "Unable to authenticate, qutting\n");
goto EXIT;
}
}
socket->decode();
if (!socket->code(name)) {
dprintf (D_ALWAYS, "Error receiving credential name\n");
goto EXIT;
}
user = socket->getFullyQualifiedUser();
dprintf (D_ALWAYS, "Authenticated as %s\n", user);
if (strchr (name, ':')) {
// The name is of the form user:name
// This better be a super-user!
// TODO: Check super-user's list
// Owner is the first part
owner = strdup (name);
char * pColon = strchr (owner, ':');
*pColon = '\0';
// Name is the second part
sprintf (name, "%s", (char*)(pColon+sizeof(char)));
if (strcmp (owner, user) != 0) {
dprintf (D_ALWAYS, "Requesting another user's (%s) credential %s\n", owner, name);
if (!isSuperUser (user)) {
dprintf (D_ALWAYS, "User %s is NOT super user, request DENIED\n", user);
goto EXIT;
} else {
dprintf (D_FULLDEBUG, "User %s is super user, request GRANTED\n", user);
}
}
} else {
owner = strdup (user);
}
dprintf (D_ALWAYS, "Attempting to delete cred %s for user %s\n", name, owner);
found_cred=false;
credentials.Rewind();
while (credentials.Next(cred_wrapper)) {
if (cred_wrapper->cred->GetType() == X509_CREDENTIAL_TYPE) {
if ((strcmp(cred_wrapper->cred->GetName(), name) == 0) &&
(strcmp(cred_wrapper->cred->GetOwner(), owner) == 0)) {
credentials.DeleteCurrent();
found_cred=true;
break; // found it
}
}
}
if (found_cred) {
priv_state priv = set_root_priv();
// Remove credential data
unlink (cred_wrapper->GetStorageName());
// Save the metadata list
SaveCredentialList();
set_priv(priv);
delete cred_wrapper;
dprintf (D_ALWAYS, "Removed credential %s for owner %s\n", name, owner);
} else {
dprintf (D_ALWAYS, "Unable to remove credential %s:%s (not found)\n", owner, name);
}
free (owner);
socket->encode();
rc = (found_cred)?CREDD_SUCCESS:CREDD_CREDENTIAL_NOT_FOUND;
socket->code(rc);
rtnVal = TRUE;
EXIT:
if (name != NULL) {
free (name);
}
return rtnVal;
}
int
get_cred_handler(Service * /*service*/, int /*i*/, Stream *stream) {
char * name = NULL;
int rtnVal = FALSE;
bool found_cred=false;
CredentialWrapper * cred = NULL;
char * owner = NULL;
const char * user = NULL;
void * data = NULL;
ReliSock * socket = (ReliSock*)stream;
// Authenticate
if (!socket->triedAuthentication()) {
CondorError errstack;
if( ! SecMan::authenticate_sock(socket, READ, &errstack) ) {
dprintf (D_ALWAYS, "Unable to authenticate, qutting\n");
goto EXIT;
}
}
socket->decode();
if (!socket->code(name)) {
dprintf (D_ALWAYS, "Error receiving credential name\n");
goto EXIT;
}
user = socket->getFullyQualifiedUser();
dprintf (D_ALWAYS, "Authenticated as %s\n", user);
if (strchr (name, ':')) {
// The name is of the form user:name
// This better be a super-user!
// TODO: Check super-user's list
// Owner is the first part
owner = strdup (name);
char * pColon = strchr (owner, ':');
*pColon = '\0';
// Name is the second part
sprintf (name, "%s", (char*)(pColon+sizeof(char)));
if (strcmp (owner, user) != 0) {
dprintf (D_ALWAYS, "Requesting another user's (%s) credential %s\n", owner, name);
if (!isSuperUser (user)) {
dprintf (D_ALWAYS, "User %s is NOT super user, request DENIED\n", user);
goto EXIT;
} else {
dprintf (D_FULLDEBUG, "User %s is super user, request GRANTED\n", user);
}
}
} else {
owner = strdup (user);
}
dprintf (D_ALWAYS, "sending cred %s for user %s\n", name, owner);
credentials.Rewind();
while (credentials.Next(cred)) {
if (cred->cred->GetType() == X509_CREDENTIAL_TYPE) {
if ((strcmp(cred->cred->GetName(), name) == 0) &&
(strcmp(cred->cred->GetOwner(), owner) == 0)) {
found_cred=true;
break; // found it
}
}
}
socket->encode();
if (found_cred) {
dprintf (D_FULLDEBUG, "Found cred %s\n", cred->GetStorageName());
int data_size;
int rc = LoadData (cred->GetStorageName(), data, data_size);
dprintf (D_FULLDEBUG, "Credential::LoadData returned %d\n", rc);
if (rc == 0) {
goto EXIT;
}
socket->code (data_size);
socket->code_bytes (data, data_size);
dprintf (D_ALWAYS, "Credential name %s for owner %s returned to user %s\n",
name, owner, user);
}
else {
dprintf (D_ALWAYS, "Cannot find cred %s\n", name);
int rc = CREDD_CREDENTIAL_NOT_FOUND;
socket->code (rc);
}
rtnVal = TRUE;
EXIT:
if ( name != NULL) {
free (name);
}
if ( owner != NULL) {
free (owner);
}
if ( data != NULL) {
free (data);
}
return rtnVal;
}
