*/
#include "includes.h"
+#include "system/filesys.h"
#include "srv_pipe_internal.h"
#include "../librpc/gen_ndr/ndr_schannel.h"
#include "../libcli/auth/schannel.h"
#include "../libcli/auth/spnego.h"
-#include "../libcli/auth/ntlmssp.h"
-#include "ntlmssp_wrap.h"
+#include "dcesrv_ntlmssp.h"
+#include "dcesrv_gssapi.h"
+#include "dcesrv_spnego.h"
#include "rpc_server.h"
+#include "rpc_dce.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_SRV
TALLOC_FREE(fname);
}
-static void free_pipe_ntlmssp_auth_data(struct pipe_auth_data *auth)
-{
- TALLOC_FREE(auth->a_u.auth_ntlmssp_state);
-}
-
-static void free_pipe_schannel_auth_data(struct pipe_auth_data *auth)
-{
- TALLOC_FREE(auth->a_u.schannel_auth);
-}
-
-static void free_pipe_auth_data(struct pipe_auth_data *auth)
-{
- if (auth->auth_data_free_func) {
- (*auth->auth_data_free_func)(auth);
- auth->auth_data_free_func = NULL;
- }
-}
-
static DATA_BLOB generic_session_key(void)
{
- return data_blob("SystemLibraryDTC", 16);
+ return data_blob_const("SystemLibraryDTC", 16);
}
/*******************************************************************
Generate the next PDU to be returned from the data.
********************************************************************/
-static bool create_next_packet(TALLOC_CTX *mem_ctx,
- struct pipe_auth_data *auth,
- uint32_t call_id,
- DATA_BLOB *rdata,
- size_t data_sent_length,
- DATA_BLOB *frag,
- size_t *pdu_size)
+static NTSTATUS create_next_packet(TALLOC_CTX *mem_ctx,
+ struct pipe_auth_data *auth,
+ uint32_t call_id,
+ DATA_BLOB *rdata,
+ size_t data_sent_length,
+ DATA_BLOB *frag,
+ size_t *pdu_size)
{
union dcerpc_payload u;
uint8_t pfc_flags;
- size_t data_len_left;
- size_t data_len;
- size_t max_len;
+ size_t data_left;
+ size_t data_to_send;
+ size_t frag_len;
size_t pad_len = 0;
size_t auth_len = 0;
NTSTATUS status;
- switch (auth->auth_level) {
- case DCERPC_AUTH_LEVEL_NONE:
- case DCERPC_AUTH_LEVEL_CONNECT:
- /* This is incorrect for auth level connect. Fixme. JRA */
-
- /* No authentication done. */
- break;
-
- case DCERPC_AUTH_LEVEL_CALL:
- case DCERPC_AUTH_LEVEL_PACKET:
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- case DCERPC_AUTH_LEVEL_PRIVACY:
-
- switch(auth->auth_type) {
- case DCERPC_AUTH_TYPE_NTLMSSP:
- auth_len = NTLMSSP_SIG_SIZE;
- break;
- case DCERPC_AUTH_TYPE_SPNEGO:
- if (auth->spnego_type !=
- PIPE_AUTH_TYPE_SPNEGO_NTLMSSP) {
- return false;
- }
- auth_len = NTLMSSP_SIG_SIZE;
- break;
-
- case DCERPC_AUTH_TYPE_SCHANNEL:
- auth_len = NL_AUTH_SIGNATURE_SIZE;
- break;
-
- default:
- return false;
- }
-
- break;
-
- default:
- return false;
- }
-
ZERO_STRUCT(u.response);
/* Set up rpc packet pfc flags. */
}
/* Work out how much we can fit in a single PDU. */
- data_len_left = rdata->length - data_sent_length;
+ data_left = rdata->length - data_sent_length;
/* Ensure there really is data left to send. */
- if (!data_len_left) {
+ if (!data_left) {
DEBUG(0, ("No data left to send !\n"));
- return false;
- }
-
- /* Max space available - not including padding. */
- if (auth_len) {
- max_len = RPC_MAX_PDU_FRAG_LEN
- - DCERPC_RESPONSE_LENGTH
- - DCERPC_AUTH_TRAILER_LENGTH
- - auth_len;
- } else {
- max_len = RPC_MAX_PDU_FRAG_LEN - DCERPC_RESPONSE_LENGTH;
+ return NT_STATUS_BUFFER_TOO_SMALL;
}
- /*
- * The amount we send is the minimum of the max_len
- * and the amount left to send.
- */
- data_len = MIN(data_len_left, max_len);
-
- if (auth_len) {
- /* Work out any padding alignment requirements. */
- pad_len = (DCERPC_RESPONSE_LENGTH + data_len) %
- SERVER_NDR_PADDING_SIZE;
- if (pad_len) {
- pad_len = SERVER_NDR_PADDING_SIZE - pad_len;
- DEBUG(10, ("Padding size is: %d\n", (int)pad_len));
- /* If we're over filling the packet, we need to make
- * space for the padding at the end of the data. */
- if (data_len + pad_len > max_len) {
- data_len -= SERVER_NDR_PADDING_SIZE;
- }
- }
+ status = dcerpc_guess_sizes(auth,
+ DCERPC_RESPONSE_LENGTH,
+ data_left,
+ RPC_MAX_PDU_FRAG_LEN,
+ SERVER_NDR_PADDING_SIZE,
+ &data_to_send, &frag_len,
+ &auth_len, &pad_len);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
/* Set up the alloc hint. This should be the data left to send. */
- u.response.alloc_hint = data_len_left;
+ u.response.alloc_hint = data_left;
/* Work out if this PDU will be the last. */
- if (data_sent_length + data_len >= rdata->length) {
+ if (data_sent_length + data_to_send >= rdata->length) {
pfc_flags |= DCERPC_PFC_FLAG_LAST;
}
/* Prepare data to be NDR encoded. */
u.response.stub_and_verifier =
- data_blob_const(rdata->data + data_sent_length, data_len);
+ data_blob_const(rdata->data + data_sent_length, data_to_send);
/* Store the packet in the data stream. */
status = dcerpc_push_ncacn_packet(mem_ctx, DCERPC_PKT_RESPONSE,
&u, frag);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to marshall RPC Packet.\n"));
- return false;
+ return status;
}
if (auth_len) {
status = dcerpc_add_auth_footer(auth, pad_len, frag);
if (!NT_STATUS_IS_OK(status)) {
data_blob_free(frag);
- return false;
+ return status;
}
}
- *pdu_size = data_len;
- return true;
+ *pdu_size = data_to_send;
+ return NT_STATUS_OK;
}
/*******************************************************************
bool create_next_pdu(struct pipes_struct *p)
{
- size_t pdu_size;
- bool ret;
+ size_t pdu_size = 0;
+ NTSTATUS status;
/*
* If we're in the fault state, keep returning fault PDU's until
return true;
}
- ret = create_next_packet(p->mem_ctx, &p->auth, p->call_id,
- &p->out_data.rdata,
- p->out_data.data_sent_length,
- &p->out_data.frag, &pdu_size);
- if (!ret) {
- DEBUG(0, ("Invalid internal auth level %u / type %u\n",
+ status = create_next_packet(p->mem_ctx, &p->auth,
+ p->call_id, &p->out_data.rdata,
+ p->out_data.data_sent_length,
+ &p->out_data.frag, &pdu_size);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to create packet with error %s, "
+ "(auth level %u / type %u)\n",
+ nt_errstr(status),
(unsigned int)p->auth.auth_level,
(unsigned int)p->auth.auth_type));
return false;
return true;
}
-/*******************************************************************
- Process an NTLMSSP authentication response.
- If this function succeeds, the user has been authenticated
- and their domain, name and calling workstation stored in
- the pipe struct.
-*******************************************************************/
-
-static bool pipe_ntlmssp_verify_final(struct pipes_struct *p,
- DATA_BLOB *p_resp_blob)
-{
- DATA_BLOB session_key, reply;
- NTSTATUS status;
- struct auth_ntlmssp_state *a = p->auth.a_u.auth_ntlmssp_state;
- bool ret;
-
- DEBUG(5,("pipe_ntlmssp_verify_final: pipe %s checking user details\n",
- get_pipe_name_from_syntax(talloc_tos(), &p->syntax)));
-
- ZERO_STRUCT(reply);
-
- /* this has to be done as root in order to verify the password */
- become_root();
- status = auth_ntlmssp_update(a, *p_resp_blob, &reply);
- unbecome_root();
-
- /* Don't generate a reply. */
- data_blob_free(&reply);
-
- if (!NT_STATUS_IS_OK(status)) {
- return False;
- }
-
- /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
- ensure the underlying NTLMSSP flags are also set. If not we should
- refuse the bind. */
-
- if (p->auth.auth_level == DCERPC_AUTH_LEVEL_INTEGRITY) {
- if (!auth_ntlmssp_negotiated_sign(a)) {
- DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet integrity requested "
- "but client declined signing.\n",
- get_pipe_name_from_syntax(talloc_tos(),
- &p->syntax)));
- return False;
- }
- }
- if (p->auth.auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
- if (!auth_ntlmssp_negotiated_seal(a)) {
- DEBUG(0,("pipe_ntlmssp_verify_final: pipe %s : packet privacy requested "
- "but client declined sealing.\n",
- get_pipe_name_from_syntax(talloc_tos(),
- &p->syntax)));
- return False;
- }
- }
-
- DEBUG(5, ("pipe_ntlmssp_verify_final: OK: user: %s domain: %s "
- "workstation: %s\n",
- auth_ntlmssp_get_username(a),
- auth_ntlmssp_get_domain(a),
- auth_ntlmssp_get_client(a)));
-
- TALLOC_FREE(p->server_info);
-
- status = auth_ntlmssp_steal_server_info(p, a, &p->server_info);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("auth_ntlmssp_server_info failed to obtain the server info for authenticated user: %s\n",
- nt_errstr(status)));
- return false;
- }
-
- if (p->server_info->ptok == NULL) {
- DEBUG(1,("Error: Authmodule failed to provide nt_user_token\n"));
- return False;
- }
-
- /*
- * We're an authenticated bind over smb, so the session key needs to
- * be set to "SystemLibraryDTC". Weird, but this is what Windows
- * does. See the RPC-SAMBA3SESSIONKEY.
- */
-
- session_key = generic_session_key();
- if (session_key.data == NULL) {
- return False;
- }
-
- ret = server_info_set_session_key(p->server_info, session_key);
-
- data_blob_free(&session_key);
-
- return True;
-}
-
-/*******************************************************************
- This is the "stage3" NTLMSSP response after a bind request and reply.
-*******************************************************************/
-
-bool api_pipe_bind_auth3(struct pipes_struct *p, struct ncacn_packet *pkt)
-{
- struct dcerpc_auth auth_info;
- NTSTATUS status;
-
- DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
-
- if (pkt->auth_length == 0) {
- DEBUG(0, ("No auth field sent for bind request!\n"));
- goto err;
- }
-
- /* Ensure there's enough data for an authenticated request. */
- if (pkt->frag_length < RPC_HEADER_LEN
- + DCERPC_AUTH_TRAILER_LENGTH
- + pkt->auth_length) {
- DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
- "%u is too large.\n",
- (unsigned int)pkt->auth_length));
- goto err;
- }
-
- /*
- * Decode the authentication verifier response.
- */
-
- status = dcerpc_pull_dcerpc_auth(pkt,
- &pkt->u.auth3.auth_info,
- &auth_info, p->endian);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
- goto err;
- }
-
- /* We must NEVER look at auth_info->auth_pad_len here,
- * as old Samba client code gets it wrong and sends it
- * as zero. JRA.
- */
-
- if (auth_info.auth_type != DCERPC_AUTH_TYPE_NTLMSSP) {
- DEBUG(0,("api_pipe_bind_auth3: incorrect auth type (%u).\n",
- (unsigned int)auth_info.auth_type ));
- return False;
- }
-
- /*
- * The following call actually checks the challenge/response data.
- * for correctness against the given DOMAIN\user name.
- */
-
- if (!pipe_ntlmssp_verify_final(p, &auth_info.credentials)) {
- goto err;
- }
-
- p->pipe_bound = True;
-
- return True;
-
- err:
-
- free_pipe_auth_data(&p->auth);
-
- return False;
-}
static bool pipe_init_outgoing_data(struct pipes_struct *p);
p->out_data.data_sent_length = 0;
p->out_data.current_pdu_sent = 0;
- free_pipe_auth_data(&p->auth);
+ TALLOC_FREE(p->auth.auth_ctx);
p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
- p->auth.spnego_type = PIPE_AUTH_TYPE_SPNEGO_NONE;
p->pipe_bound = False;
return True;
return False;
}
+ context_fns->next = context_fns->prev = NULL;
context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(abstract);
context_fns->cmds = rpc_srv_get_pipe_cmds(abstract);
context_fns->context_id = context_id;
return false;
}
-/*******************************************************************
- Handle a SPNEGO krb5 bind auth.
-*******************************************************************/
-
-static bool pipe_spnego_auth_bind_kerberos(struct pipes_struct *p,
- TALLOC_CTX *mem_ctx,
- struct dcerpc_auth *pauth_info,
- DATA_BLOB *psecblob,
- DATA_BLOB *response)
-{
- return False;
-}
-
/*******************************************************************
Handle the first part of a SPNEGO bind auth.
*******************************************************************/
-static bool pipe_spnego_auth_bind_negotiate(struct pipes_struct *p,
- TALLOC_CTX *mem_ctx,
- struct dcerpc_auth *pauth_info,
- DATA_BLOB *response)
+static bool pipe_spnego_auth_bind(struct pipes_struct *p,
+ TALLOC_CTX *mem_ctx,
+ struct dcerpc_auth *auth_info,
+ DATA_BLOB *response)
{
- DATA_BLOB secblob;
- DATA_BLOB chal;
- char *OIDs[ASN1_MAX_OIDS];
- int i;
+ struct spnego_context *spnego_ctx;
NTSTATUS status;
- bool got_kerberos_mechanism = false;
- struct auth_ntlmssp_state *a = NULL;
-
- ZERO_STRUCT(secblob);
- ZERO_STRUCT(chal);
- if (pauth_info->credentials.data[0] != ASN1_APPLICATION(0)) {
- goto err;
- }
-
- /* parse out the OIDs and the first sec blob */
- if (!spnego_parse_negTokenInit(talloc_tos(),
- pauth_info->credentials, OIDs, NULL, &secblob)) {
- DEBUG(0,("pipe_spnego_auth_bind_negotiate: Failed to parse the security blob.\n"));
- goto err;
- }
-
- if (strcmp(OID_KERBEROS5, OIDs[0]) == 0 || strcmp(OID_KERBEROS5_OLD, OIDs[0]) == 0) {
- got_kerberos_mechanism = true;
- }
-
- for (i=0;OIDs[i];i++) {
- DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got OID %s\n", OIDs[i]));
- TALLOC_FREE(OIDs[i]);
- }
- DEBUG(3,("pipe_spnego_auth_bind_negotiate: Got secblob of size %lu\n", (unsigned long)secblob.length));
-
- if ( got_kerberos_mechanism && ((lp_security()==SEC_ADS) || USE_KERBEROS_KEYTAB) ) {
- bool ret;
- ret = pipe_spnego_auth_bind_kerberos(p, mem_ctx, pauth_info,
- &secblob, response);
- data_blob_free(&secblob);
- return ret;
- }
-
- /* Free any previous auth type. */
- free_pipe_auth_data(&p->auth);
-
- if (!got_kerberos_mechanism) {
- /* Initialize the NTLM engine. */
- status = auth_ntlmssp_start(&a);
- if (!NT_STATUS_IS_OK(status)) {
- goto err;
- }
-
- /* Clear flags,
- * then set them according to requested Auth Level */
- auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
- NTLMSSP_NEGOTIATE_SEAL));
- switch (pauth_info->auth_level) {
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- auth_ntlmssp_or_flags(a,
- NTLMSSP_NEGOTIATE_SIGN);
- break;
- case DCERPC_AUTH_LEVEL_PRIVACY:
- /* Privacy always implies both sign and seal
- * for ntlmssp */
- auth_ntlmssp_or_flags(a,
- NTLMSSP_NEGOTIATE_SIGN |
- NTLMSSP_NEGOTIATE_SEAL);
- break;
- default:
- break;
- }
- /*
- * Pass the first security blob of data to it.
- * This can return an error or NT_STATUS_MORE_PROCESSING_REQUIRED
- * which means we need another packet to complete the bind.
- */
-
- status = auth_ntlmssp_update(a, secblob, &chal);
-
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- DEBUG(3,("pipe_spnego_auth_bind_negotiate: auth_ntlmssp_update failed.\n"));
- goto err;
- }
-
- /* Generate the response blob we need for step 2 of the bind. */
- *response = spnego_gen_auth_response(mem_ctx, &chal, status, OID_NTLMSSP);
- } else {
- /*
- * SPNEGO negotiate down to NTLMSSP. The subsequent
- * code to process follow-up packets is not complete
- * yet. JRA.
- */
- *response = spnego_gen_auth_response(mem_ctx, NULL,
- NT_STATUS_MORE_PROCESSING_REQUIRED,
- OID_NTLMSSP);
+ status = spnego_server_auth_start(p,
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY),
+ true,
+ &auth_info->credentials,
+ response,
+ &spnego_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed SPNEGO negotiate (%s)\n",
+ nt_errstr(status)));
+ return false;
}
- /* auth_pad_len will be handled by the caller */
+ /* Make sure data is bound to the memctx, to be freed the caller */
+ talloc_steal(mem_ctx, response->data);
- p->auth.a_u.auth_ntlmssp_state = a;
- p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
+ p->auth.auth_ctx = spnego_ctx;
p->auth.auth_type = DCERPC_AUTH_TYPE_SPNEGO;
- p->auth.spnego_type = PIPE_AUTH_TYPE_SPNEGO_NTLMSSP;
-
- data_blob_free(&secblob);
- data_blob_free(&chal);
-
- /* We can't set pipe_bound True yet - we need an RPC_ALTER_CONTEXT response packet... */
- return True;
-
- err:
-
- data_blob_free(&secblob);
- data_blob_free(&chal);
-
- p->auth.a_u.auth_ntlmssp_state = NULL;
-
- return False;
-}
-
-/*******************************************************************
- Handle the second part of a SPNEGO bind auth.
-*******************************************************************/
-
-static bool pipe_spnego_auth_bind_continue(struct pipes_struct *p,
- TALLOC_CTX *mem_ctx,
- struct dcerpc_auth *pauth_info,
- DATA_BLOB *response)
-{
- DATA_BLOB auth_blob;
- DATA_BLOB auth_reply;
- struct auth_ntlmssp_state *a = p->auth.a_u.auth_ntlmssp_state;
-
- ZERO_STRUCT(auth_blob);
- ZERO_STRUCT(auth_reply);
-
- /*
- * NB. If we've negotiated down from krb5 to NTLMSSP we'll currently
- * fail here as 'a' == NULL.
- */
- if (p->auth.auth_type != DCERPC_AUTH_TYPE_SPNEGO ||
- p->auth.spnego_type != PIPE_AUTH_TYPE_SPNEGO_NTLMSSP || !a) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: not in NTLMSSP auth state.\n"));
- goto err;
- }
-
- if (pauth_info->credentials.data[0] != ASN1_CONTEXT(1)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob type.\n"));
- goto err;
- }
-
- if (!spnego_parse_auth(talloc_tos(), pauth_info->credentials, &auth_blob)) {
- DEBUG(0,("pipe_spnego_auth_bind_continue: invalid SPNEGO blob.\n"));
- goto err;
- }
-
- /*
- * The following call actually checks the challenge/response data.
- * for correctness against the given DOMAIN\user name.
- */
-
- if (!pipe_ntlmssp_verify_final(p, &auth_blob)) {
- goto err;
- }
-
- data_blob_free(&auth_blob);
-
- /* Generate the spnego "accept completed" blob - no incoming data. */
- *response = spnego_gen_auth_response(mem_ctx, &auth_reply, NT_STATUS_OK, OID_NTLMSSP);
-
- data_blob_free(&auth_reply);
-
- p->pipe_bound = True;
-
- return True;
-
- err:
- data_blob_free(&auth_blob);
- data_blob_free(&auth_reply);
+ DEBUG(10, ("SPNEGO auth started\n"));
- free_pipe_auth_data(&p->auth);
-
- return False;
+ return true;
}
/*******************************************************************
bool ret;
NTSTATUS status;
struct netlogon_creds_CredentialState *creds;
- DATA_BLOB session_key;
enum ndr_err_code ndr_err;
+ struct schannel_state *schannel_auth;
ndr_err = ndr_pull_struct_blob(
&auth_info->credentials, mem_ctx, &neg,
return False;
}
- p->auth.a_u.schannel_auth = talloc(p, struct schannel_state);
- if (!p->auth.a_u.schannel_auth) {
+ schannel_auth = talloc(p, struct schannel_state);
+ if (!schannel_auth) {
TALLOC_FREE(creds);
return False;
}
- p->auth.a_u.schannel_auth->state = SCHANNEL_STATE_START;
- p->auth.a_u.schannel_auth->seq_num = 0;
- p->auth.a_u.schannel_auth->initiator = false;
- p->auth.a_u.schannel_auth->creds = creds;
+ schannel_auth->state = SCHANNEL_STATE_START;
+ schannel_auth->seq_num = 0;
+ schannel_auth->initiator = false;
+ schannel_auth->creds = creds;
/*
* JRA. Should we also copy the schannel session key into the pipe session key p->session_key
* anymore.
*/
- session_key = generic_session_key();
- if (session_key.data == NULL) {
- DEBUG(0, ("pipe_schannel_auth_bind: Could not alloc session"
- " key\n"));
- return false;
- }
-
- ret = server_info_set_session_key(p->server_info, session_key);
-
- data_blob_free(&session_key);
+ ret = session_info_set_session_key(p->session_info, generic_session_key());
if (!ret) {
- DEBUG(0, ("server_info_set_session_key failed\n"));
+ DEBUG(0, ("session_info_set_session_key failed\n"));
return false;
}
neg.oem_netbios_domain.a, neg.oem_netbios_computer.a));
/* We're finished with this bind - no more packets. */
- p->auth.auth_data_free_func = &free_pipe_schannel_auth_data;
+ p->auth.auth_ctx = schannel_auth;
p->auth.auth_type = DCERPC_AUTH_TYPE_SCHANNEL;
p->pipe_bound = True;
struct dcerpc_auth *auth_info,
DATA_BLOB *response)
{
+ struct auth_ntlmssp_state *ntlmssp_state = NULL;
NTSTATUS status;
- struct auth_ntlmssp_state *a = NULL;
if (strncmp((char *)auth_info->credentials.data, "NTLMSSP", 7) != 0) {
DEBUG(0, ("Failed to read NTLMSSP in blob\n"));
- goto err;
+ return false;
}
/* We have an NTLMSSP blob. */
- status = auth_ntlmssp_start(&a);
+ status = ntlmssp_server_auth_start(p,
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY),
+ true,
+ &auth_info->credentials,
+ response,
+ &ntlmssp_state);
+ if (!NT_STATUS_EQUAL(status, NT_STATUS_OK)) {
+ DEBUG(0, (__location__ ": auth_ntlmssp_start failed: %s\n",
+ nt_errstr(status)));
+ return false;
+ }
+
+ /* Make sure data is bound to the memctx, to be freed the caller */
+ talloc_steal(mem_ctx, response->data);
+
+ p->auth.auth_ctx = ntlmssp_state;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
+
+ DEBUG(10, (__location__ ": NTLMSSP auth started\n"));
+
+ return true;
+}
+
+/*******************************************************************
+ Process an NTLMSSP authentication response.
+ If this function succeeds, the user has been authenticated
+ and their domain, name and calling workstation stored in
+ the pipe struct.
+*******************************************************************/
+
+static bool pipe_ntlmssp_verify_final(TALLOC_CTX *mem_ctx,
+ struct auth_ntlmssp_state *ntlmssp_ctx,
+ enum dcerpc_AuthLevel auth_level,
+ struct client_address *client_id,
+ struct ndr_syntax_id *syntax,
+ struct auth_serversupplied_info **session_info)
+{
+ NTSTATUS status;
+ bool ret;
+
+ DEBUG(5, (__location__ ": pipe %s checking user details\n",
+ get_pipe_name_from_syntax(talloc_tos(), syntax)));
+
+ /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
+ ensure the underlying NTLMSSP flags are also set. If not we should
+ refuse the bind. */
+
+ status = ntlmssp_server_check_flags(ntlmssp_ctx,
+ (auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY));
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_start failed: %s\n",
- nt_errstr(status) ));
- goto err;
+ DEBUG(0, (__location__ ": Client failed to negotatie proper "
+ "security for pipe %s\n",
+ get_pipe_name_from_syntax(talloc_tos(), syntax)));
+ return false;
}
- /* Clear flags, then set them according to requested Auth Level */
- auth_ntlmssp_and_flags(a, ~(NTLMSSP_NEGOTIATE_SIGN |
- NTLMSSP_NEGOTIATE_SEAL));
+ TALLOC_FREE(*session_info);
- switch (auth_info->auth_level) {
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN);
- break;
- case DCERPC_AUTH_LEVEL_PRIVACY:
- /* Privacy always implies both sign and seal for ntlmssp */
- auth_ntlmssp_or_flags(a, NTLMSSP_NEGOTIATE_SIGN |
- NTLMSSP_NEGOTIATE_SEAL);
- break;
- default:
- break;
+ status = ntlmssp_server_get_user_info(ntlmssp_ctx,
+ mem_ctx, session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, (__location__ ": failed to obtain the server info "
+ "for authenticated user: %s\n", nt_errstr(status)));
+ return false;
+ }
+
+ if ((*session_info)->security_token == NULL) {
+ DEBUG(1, ("Auth module failed to provide nt_user_token\n"));
+ return false;
}
- status = auth_ntlmssp_update(a, auth_info->credentials, response);
- if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- DEBUG(0,("pipe_ntlmssp_auth_bind: auth_ntlmssp_update failed: %s\n",
- nt_errstr(status) ));
+ /*
+ * We're an authenticated bind over smb, so the session key needs to
+ * be set to "SystemLibraryDTC". Weird, but this is what Windows
+ * does. See the RPC-SAMBA3SESSIONKEY.
+ */
+
+ ret = session_info_set_session_key((*session_info), generic_session_key());
+ if (!ret) {
+ DEBUG(0, ("Failed to set session key!\n"));
+ return false;
+ }
+
+ return true;
+}
+
+/*******************************************************************
+ Handle a GSSAPI bind auth.
+*******************************************************************/
+
+static bool pipe_gssapi_auth_bind(struct pipes_struct *p,
+ TALLOC_CTX *mem_ctx,
+ struct dcerpc_auth *auth_info,
+ DATA_BLOB *response)
+{
+ NTSTATUS status;
+ struct gse_context *gse_ctx = NULL;
+
+ status = gssapi_server_auth_start(p,
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_INTEGRITY),
+ (auth_info->auth_level ==
+ DCERPC_AUTH_LEVEL_PRIVACY),
+ true,
+ &auth_info->credentials,
+ response,
+ &gse_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to init dcerpc gssapi server (%s)\n",
+ nt_errstr(status)));
goto err;
}
/* Make sure data is bound to the memctx, to be freed the caller */
talloc_steal(mem_ctx, response->data);
- p->auth.a_u.auth_ntlmssp_state = a;
- p->auth.auth_data_free_func = &free_pipe_ntlmssp_auth_data;
- p->auth.auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
+ p->auth.auth_ctx = gse_ctx;
+ p->auth.auth_type = DCERPC_AUTH_TYPE_KRB5;
- DEBUG(10,("pipe_ntlmssp_auth_bind: NTLMSSP auth started\n"));
+ DEBUG(10, ("KRB5 auth started\n"));
- /* We can't set pipe_bound True yet - we need an DCERPC_PKT_AUTH3 response packet... */
- return True;
+ return true;
- err:
+err:
+ TALLOC_FREE(gse_ctx);
+ return false;
+}
- TALLOC_FREE(a);
- return False;
+static NTSTATUS pipe_gssapi_verify_final(TALLOC_CTX *mem_ctx,
+ struct gse_context *gse_ctx,
+ struct client_address *client_id,
+ struct auth_serversupplied_info **session_info)
+{
+ NTSTATUS status;
+ bool bret;
+
+ /* Finally - if the pipe negotiated integrity (sign) or privacy (seal)
+ ensure the underlying flags are also set. If not we should
+ refuse the bind. */
+
+ status = gssapi_server_check_flags(gse_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Requested Security Layers not honored!\n"));
+ return status;
+ }
+
+ status = gssapi_server_get_user_info(gse_ctx, mem_ctx,
+ client_id, session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, (__location__ ": failed to obtain the server info "
+ "for authenticated user: %s\n", nt_errstr(status)));
+ return status;
+ }
+
+ if ((*session_info)->security_token == NULL) {
+ status = create_local_token(*session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("Failed to create local user token (%s)\n",
+ nt_errstr(status)));
+ status = NT_STATUS_ACCESS_DENIED;
+ return status;
+ }
+ }
+
+ /* TODO: this is what the ntlmssp code does with the session_key, check
+ * it is ok with gssapi too */
+ /*
+ * We're an authenticated bind over smb, so the session key needs to
+ * be set to "SystemLibraryDTC". Weird, but this is what Windows
+ * does. See the RPC-SAMBA3SESSIONKEY.
+ */
+
+ bret = session_info_set_session_key((*session_info), generic_session_key());
+ if (!bret) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS pipe_auth_verify_final(struct pipes_struct *p)
+{
+ enum spnego_mech auth_type;
+ struct auth_ntlmssp_state *ntlmssp_ctx;
+ struct spnego_context *spnego_ctx;
+ struct gse_context *gse_ctx;
+ void *mech_ctx;
+ NTSTATUS status;
+
+ switch (p->auth.auth_type) {
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct auth_ntlmssp_state);
+ if (!pipe_ntlmssp_verify_final(p, ntlmssp_ctx,
+ p->auth.auth_level,
+ p->client_id, &p->syntax,
+ &p->session_info)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ break;
+ case DCERPC_AUTH_TYPE_KRB5:
+ gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct gse_context);
+ status = pipe_gssapi_verify_final(p, gse_ctx,
+ p->client_id,
+ &p->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("gssapi bind failed with: %s",
+ nt_errstr(status)));
+ return status;
+ }
+ break;
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct spnego_context);
+ status = spnego_get_negotiated_mech(spnego_ctx,
+ &auth_type, &mech_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Bad SPNEGO state (%s)\n",
+ nt_errstr(status)));
+ return status;
+ }
+ switch(auth_type) {
+ case SPNEGO_KRB5:
+ gse_ctx = talloc_get_type_abort(mech_ctx,
+ struct gse_context);
+ status = pipe_gssapi_verify_final(p, gse_ctx,
+ p->client_id,
+ &p->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(1, ("gssapi bind failed with: %s",
+ nt_errstr(status)));
+ return status;
+ }
+ break;
+ case SPNEGO_NTLMSSP:
+ ntlmssp_ctx = talloc_get_type_abort(mech_ctx,
+ struct auth_ntlmssp_state);
+ if (!pipe_ntlmssp_verify_final(p, ntlmssp_ctx,
+ p->auth.auth_level,
+ p->client_id,
+ &p->syntax,
+ &p->session_info)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ break;
+ default:
+ DEBUG(0, (__location__ ": incorrect spnego type "
+ "(%d).\n", auth_type));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ break;
+ default:
+ DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
+ (unsigned int)p->auth.auth_type));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ p->pipe_bound = true;
+
+ return NT_STATUS_OK;
}
/*******************************************************************
Respond to a pipe bind request.
*******************************************************************/
-bool api_pipe_bind_req(struct pipes_struct *p, struct ncacn_packet *pkt)
+static bool api_pipe_bind_req(struct pipes_struct *p,
+ struct ncacn_packet *pkt)
{
struct dcerpc_auth auth_info;
uint16 assoc_gid;
case DCERPC_AUTH_LEVEL_PRIVACY:
p->auth.auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
break;
+ case DCERPC_AUTH_LEVEL_CONNECT:
+ p->auth.auth_level = DCERPC_AUTH_LEVEL_CONNECT;
+ break;
default:
DEBUG(0, ("Unexpected auth level (%u).\n",
(unsigned int)auth_info.auth_level ));
break;
case DCERPC_AUTH_TYPE_SPNEGO:
- if (!pipe_spnego_auth_bind_negotiate(p, pkt,
+ if (!pipe_spnego_auth_bind(p, pkt,
+ &auth_info, &auth_resp)) {
+ goto err_exit;
+ }
+ break;
+
+ case DCERPC_AUTH_TYPE_KRB5:
+ if (!pipe_gssapi_auth_bind(p, pkt,
&auth_info, &auth_resp)) {
goto err_exit;
}
break;
+ case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
+ if (p->transport == NCALRPC && p->ncalrpc_as_system) {
+ TALLOC_FREE(p->session_info);
+
+ status = make_session_info_system(p,
+ &p->session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ goto err_exit;
+ }
+
+ auth_resp = data_blob_talloc(pkt,
+ "NCALRPC_AUTH_OK",
+ 15);
+
+ p->auth.auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM;
+ p->pipe_bound = true;
+ } else {
+ goto err_exit;
+ }
+ break;
+
case DCERPC_AUTH_TYPE_NONE:
break;
/* Unauthenticated bind request. */
/* We're finished - no more packets. */
p->auth.auth_type = DCERPC_AUTH_TYPE_NONE;
- p->auth.spnego_type = PIPE_AUTH_TYPE_SPNEGO_NONE;
/* We must set the pipe auth_level here also. */
p->auth.auth_level = DCERPC_AUTH_LEVEL_NONE;
p->pipe_bound = True;
return setup_bind_nak(p, pkt);
}
+/*******************************************************************
+ This is the "stage3" response after a bind request and reply.
+*******************************************************************/
+
+bool api_pipe_bind_auth3(struct pipes_struct *p, struct ncacn_packet *pkt)
+{
+ struct dcerpc_auth auth_info;
+ DATA_BLOB response = data_blob_null;
+ struct auth_ntlmssp_state *ntlmssp_ctx;
+ struct spnego_context *spnego_ctx;
+ struct gse_context *gse_ctx;
+ NTSTATUS status;
+
+ DEBUG(5, ("api_pipe_bind_auth3: decode request. %d\n", __LINE__));
+
+ if (pkt->auth_length == 0) {
+ DEBUG(0, ("No auth field sent for bind request!\n"));
+ goto err;
+ }
+
+ /* Ensure there's enough data for an authenticated request. */
+ if (pkt->frag_length < RPC_HEADER_LEN
+ + DCERPC_AUTH_TRAILER_LENGTH
+ + pkt->auth_length) {
+ DEBUG(0,("api_pipe_ntlmssp_auth_process: auth_len "
+ "%u is too large.\n",
+ (unsigned int)pkt->auth_length));
+ goto err;
+ }
+
+ /*
+ * Decode the authentication verifier response.
+ */
+
+ status = dcerpc_pull_dcerpc_auth(pkt,
+ &pkt->u.auth3.auth_info,
+ &auth_info, p->endian);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to unmarshall dcerpc_auth.\n"));
+ goto err;
+ }
+
+ /* We must NEVER look at auth_info->auth_pad_len here,
+ * as old Samba client code gets it wrong and sends it
+ * as zero. JRA.
+ */
+
+ if (auth_info.auth_type != p->auth.auth_type) {
+ DEBUG(0, ("Auth type mismatch! Client sent %d, "
+ "but auth was started as type %d!\n",
+ auth_info.auth_type, p->auth.auth_type));
+ goto err;
+ }
+
+ switch (auth_info.auth_type) {
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct auth_ntlmssp_state);
+ status = ntlmssp_server_step(ntlmssp_ctx,
+ pkt, &auth_info.credentials,
+ &response);
+ break;
+ case DCERPC_AUTH_TYPE_KRB5:
+ gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct gse_context);
+ status = gssapi_server_step(gse_ctx,
+ pkt, &auth_info.credentials,
+ &response);
+ break;
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct spnego_context);
+ status = spnego_server_step(spnego_ctx,
+ pkt, &auth_info.credentials,
+ &response);
+ break;
+ default:
+ DEBUG(0, (__location__ ": incorrect auth type (%u).\n",
+ (unsigned int)auth_info.auth_type));
+ return false;
+ }
+
+ if (NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED) ||
+ response.length) {
+ DEBUG(0, (__location__ ": This was supposed to be the final "
+ "leg, but crypto machinery claims a response is "
+ "needed, aborting auth!\n"));
+ data_blob_free(&response);
+ goto err;
+ }
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Auth failed (%s)\n", nt_errstr(status)));
+ goto err;
+ }
+
+ /* Now verify auth was indeed successful and extract server info */
+ status = pipe_auth_verify_final(p);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Auth Verify failed (%s)\n", nt_errstr(status)));
+ goto err;
+ }
+
+ return true;
+
+err:
+
+ TALLOC_FREE(p->auth.auth_ctx);
+ return false;
+}
+
/****************************************************************************
Deal with an alter context call. Can be third part of 3 leg auth request for
SPNEGO calls.
****************************************************************************/
-bool api_pipe_alter_context(struct pipes_struct *p, struct ncacn_packet *pkt)
+static bool api_pipe_alter_context(struct pipes_struct *p,
+ struct ncacn_packet *pkt)
{
struct dcerpc_auth auth_info;
uint16 assoc_gid;
DATA_BLOB auth_resp = data_blob_null;
DATA_BLOB auth_blob = data_blob_null;
int pad_len = 0;
+ struct auth_ntlmssp_state *ntlmssp_ctx;
+ struct spnego_context *spnego_ctx;
+ struct gse_context *gse_ctx;
DEBUG(5,("api_pipe_alter_context: make response. %d\n", __LINE__));
goto err_exit;
}
+ /* We can only finish if the pipe is unbound for now */
+ if (p->pipe_bound) {
+ DEBUG(0, (__location__ ": Pipe already bound, "
+ "Altering Context not yet supported!\n"));
+ goto err_exit;
+ }
+
+ if (auth_info.auth_type != p->auth.auth_type) {
+ DEBUG(0, ("Auth type mismatch! Client sent %d, "
+ "but auth was started as type %d!\n",
+ auth_info.auth_type, p->auth.auth_type));
+ goto err_exit;
+ }
- /*
- * Currently only the SPNEGO auth type uses the alter ctx
- * response in place of the NTLMSSP auth3 type.
- */
- if (auth_info.auth_type == DCERPC_AUTH_TYPE_SPNEGO) {
- /* We can only finish if the pipe is unbound. */
- if (!p->pipe_bound) {
- if (!pipe_spnego_auth_bind_continue(p, pkt,
- &auth_info, &auth_resp)) {
- goto err_exit;
- }
+ switch (auth_info.auth_type) {
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ spnego_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct spnego_context);
+ status = spnego_server_step(spnego_ctx,
+ pkt,
+ &auth_info.credentials,
+ &auth_resp);
+ break;
- } else {
+ case DCERPC_AUTH_TYPE_KRB5:
+ gse_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct gse_context);
+ status = gssapi_server_step(gse_ctx,
+ pkt,
+ &auth_info.credentials,
+ &auth_resp);
+ break;
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ ntlmssp_ctx = talloc_get_type_abort(p->auth.auth_ctx,
+ struct auth_ntlmssp_state);
+ status = ntlmssp_server_step(ntlmssp_ctx,
+ pkt,
+ &auth_info.credentials,
+ &auth_resp);
+ break;
+
+ default:
+ DEBUG(3, (__location__ ": Usupported auth type (%d) "
+ "in alter-context call\n",
+ auth_info.auth_type));
+ goto err_exit;
+ }
+
+ if (NT_STATUS_IS_OK(status)) {
+ /* third leg of auth, verify auth info */
+ status = pipe_auth_verify_final(p);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Auth Verify failed (%s)\n",
+ nt_errstr(status)));
goto err_exit;
}
+ } else if (NT_STATUS_EQUAL(status,
+ NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ DEBUG(10, ("More auth legs required.\n"));
+ } else {
+ DEBUG(0, ("Auth step returned an error (%s)\n",
+ nt_errstr(status)));
+ goto err_exit;
}
}
return NULL;
}
-/****************************************************************************
- Memory cleanup.
-****************************************************************************/
-
-void free_pipe_rpc_context( PIPE_RPC_FNS *list )
-{
- PIPE_RPC_FNS *tmp = list;
- PIPE_RPC_FNS *tmp2;
-
- while (tmp) {
- tmp2 = tmp->next;
- SAFE_FREE(tmp);
- tmp = tmp2;
- }
-
- return;
-}
-
static bool api_rpcTNP(struct pipes_struct *p, struct ncacn_packet *pkt,
const struct api_struct *api_rpc_cmds, int n_cmds);
before doing the call.
****************************************************************************/
-bool api_pipe_request(struct pipes_struct *p, struct ncacn_packet *pkt)
+static bool api_pipe_request(struct pipes_struct *p,
+ struct ncacn_packet *pkt)
{
bool ret = False;
bool changed_user = False;
if (p->pipe_bound &&
((p->auth.auth_type == DCERPC_AUTH_TYPE_NTLMSSP) ||
- ((p->auth.auth_type == DCERPC_AUTH_TYPE_SPNEGO) &&
- (p->auth.spnego_type == PIPE_AUTH_TYPE_SPNEGO_NTLMSSP)))) {
+ (p->auth.auth_type == DCERPC_AUTH_TYPE_KRB5) ||
+ (p->auth.auth_type == DCERPC_AUTH_TYPE_SPNEGO))) {
if(!become_authenticated_pipe_user(p)) {
data_blob_free(&p->out_data.rdata);
return False;
case DCERPC_PKT_AUTH3:
/*
- * The third packet in an NTLMSSP auth exchange.
+ * The third packet in an auth exchange.
*/
if (pipe_init_outgoing_data(p)) {
reply = api_pipe_bind_auth3(p, pkt);