#include "librpc/gen_ndr/ndr_dcerpc.h"
#include "auth/credentials/credentials.h"
#include "auth/gensec/gensec.h"
+#include "auth/auth.h"
#include "param/param.h"
/*
struct dcesrv_connection *dce_conn = call->conn;
struct dcesrv_auth *auth = &dce_conn->auth_state;
NTSTATUS status;
- enum ndr_err_code ndr_err;
+ uint32_t auth_length;
if (pkt->u.bind.auth_info.length == 0) {
dce_conn->auth_state.auth_info = NULL;
return false;
}
- ndr_err = ndr_pull_struct_blob(&pkt->u.bind.auth_info,
- call, NULL,
- dce_conn->auth_state.auth_info,
- (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- return false;
- }
-
- status = gensec_server_start(dce_conn, call->event_ctx, call->conn->dce_ctx->lp_ctx, call->msg_ctx, &auth->gensec_security);
- if (!NT_STATUS_IS_OK(status)) {
- DEBUG(1, ("Failed to start GENSEC for DCERPC server: %s\n", nt_errstr(status)));
- return false;
- }
-
+ status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.bind.auth_info,
+ dce_conn->auth_state.auth_info,
+ &auth_length, false);
server_credentials
= cli_credentials_init(call);
if (!server_credentials) {
server_credentials = NULL;
}
- gensec_set_credentials(auth->gensec_security, server_credentials);
+ status = samba_server_gensec_start(dce_conn, call->event_ctx,
+ call->msg_ctx,
+ call->conn->dce_ctx->lp_ctx,
+ server_credentials,
+ NULL,
+ &auth->gensec_security);
status = gensec_start_mech_by_authtype(auth->gensec_security, auth->auth_info->auth_type,
auth->auth_info->auth_level);
return false;
}
+ if (call->conn->state_flags & DCESRV_CALL_STATE_FLAG_HEADER_SIGNING) {
+ gensec_want_feature(auth->gensec_security, GENSEC_FEATURE_SIGN_PKT_HEADER);
+ }
+
return true;
}
return status;
}
+ if (dce_conn->state_flags & DCESRV_CALL_STATE_FLAG_HEADER_SIGNING) {
+ gensec_want_feature(dce_conn->auth_state.gensec_security,
+ GENSEC_FEATURE_SIGN_PKT_HEADER);
+ }
+
/* Now that we are authenticated, go back to the generic session key... */
dce_conn->auth_state.session_key = dcesrv_generic_session_key;
return NT_STATUS_OK;
struct ncacn_packet *pkt = &call->pkt;
struct dcesrv_connection *dce_conn = call->conn;
NTSTATUS status;
- enum ndr_err_code ndr_err;
+ uint32_t auth_length;
/* We can't work without an existing gensec state, and an new blob to feed it */
if (!dce_conn->auth_state.auth_info ||
return false;
}
- ndr_err = ndr_pull_struct_blob(&pkt->u.auth3.auth_info,
- call, NULL,
- dce_conn->auth_state.auth_info,
- (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.auth3.auth_info,
+ dce_conn->auth_state.auth_info, &auth_length, true);
+ if (!NT_STATUS_IS_OK(status)) {
return false;
}
{
struct ncacn_packet *pkt = &call->pkt;
struct dcesrv_connection *dce_conn = call->conn;
- enum ndr_err_code ndr_err;
+ NTSTATUS status;
+ uint32_t auth_length;
/* on a pure interface change there is no auth blob */
if (pkt->u.alter.auth_info.length == 0) {
return false;
}
- ndr_err = ndr_pull_struct_blob(&pkt->u.alter.auth_info,
- call, NULL,
- dce_conn->auth_state.auth_info,
- (ndr_pull_flags_fn_t)ndr_pull_dcerpc_auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ status = dcerpc_pull_auth_trailer(pkt, call, &pkt->u.alter.auth_info,
+ dce_conn->auth_state.auth_info,
+ &auth_length, true);
+ if (!NT_STATUS_IS_OK(status)) {
return false;
}
return status;
}
-/*
- generate a CONNECT level verifier
-*/
-static NTSTATUS dcesrv_connect_verifier(TALLOC_CTX *mem_ctx, DATA_BLOB *blob)
-{
- *blob = data_blob_talloc(mem_ctx, NULL, 16);
- if (blob->data == NULL) {
- return NT_STATUS_NO_MEMORY;
- }
- SIVAL(blob->data, 0, 1);
- memset(blob->data+4, 0, 12);
- return NT_STATUS_OK;
-}
-
-/*
- generate a CONNECT level verifier
-*/
-static NTSTATUS dcesrv_check_connect_verifier(DATA_BLOB *blob)
-{
- if (blob->length != 16 ||
- IVAL(blob->data, 0) != 1) {
- return NT_STATUS_ACCESS_DENIED;
- }
- return NT_STATUS_OK;
-}
-
-
/*
check credentials on a request
*/
{
struct ncacn_packet *pkt = &call->pkt;
struct dcesrv_connection *dce_conn = call->conn;
- DATA_BLOB auth_blob;
struct dcerpc_auth auth;
- struct ndr_pull *ndr;
NTSTATUS status;
- enum ndr_err_code ndr_err;
+ uint32_t auth_length;
+ size_t hdr_size = DCERPC_REQUEST_LENGTH;
if (!dce_conn->auth_state.auth_info ||
!dce_conn->auth_state.gensec_security) {
return true;
}
- auth_blob.length = 8 + pkt->auth_length;
-
- /* check for a valid length */
- if (pkt->u.request.stub_and_verifier.length < auth_blob.length) {
- return false;
+ if (pkt->pfc_flags & DCERPC_PFC_FLAG_OBJECT_UUID) {
+ hdr_size += 16;
}
- auth_blob.data =
- pkt->u.request.stub_and_verifier.data +
- pkt->u.request.stub_and_verifier.length - auth_blob.length;
- pkt->u.request.stub_and_verifier.length -= auth_blob.length;
+ switch (dce_conn->auth_state.auth_info->auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ break;
- /* pull the auth structure */
- ndr = ndr_pull_init_blob(&auth_blob, call, lp_iconv_convenience(call->conn->dce_ctx->lp_ctx));
- if (!ndr) {
- return false;
- }
+ case DCERPC_AUTH_LEVEL_CONNECT:
+ if (pkt->auth_length != 0) {
+ break;
+ }
+ return true;
+ case DCERPC_AUTH_LEVEL_NONE:
+ if (pkt->auth_length != 0) {
+ return false;
+ }
+ return true;
- if (!(pkt->drep[0] & DCERPC_DREP_LE)) {
- ndr->flags |= LIBNDR_FLAG_BIGENDIAN;
+ default:
+ return false;
}
- ndr_err = ndr_pull_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS, &auth);
- if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
- talloc_free(ndr);
+ status = dcerpc_pull_auth_trailer(pkt, call,
+ &pkt->u.request.stub_and_verifier,
+ &auth, &auth_length, false);
+ if (!NT_STATUS_IS_OK(status)) {
return false;
}
+ pkt->u.request.stub_and_verifier.length -= auth_length;
+
/* check signature or unseal the packet */
switch (dce_conn->auth_state.auth_info->auth_level) {
case DCERPC_AUTH_LEVEL_PRIVACY:
status = gensec_unseal_packet(dce_conn->auth_state.gensec_security,
call,
- full_packet->data + DCERPC_REQUEST_LENGTH,
+ full_packet->data + hdr_size,
pkt->u.request.stub_and_verifier.length,
full_packet->data,
full_packet->length-auth.credentials.length,
&auth.credentials);
memcpy(pkt->u.request.stub_and_verifier.data,
- full_packet->data + DCERPC_REQUEST_LENGTH,
+ full_packet->data + hdr_size,
pkt->u.request.stub_and_verifier.length);
break;
break;
case DCERPC_AUTH_LEVEL_CONNECT:
- status = dcesrv_check_connect_verifier(&auth.credentials);
+ /* for now we ignore possible signatures here */
+ status = NT_STATUS_OK;
break;
default:
/* remove the indicated amount of padding */
if (pkt->u.request.stub_and_verifier.length < auth.auth_pad_length) {
- talloc_free(ndr);
return false;
}
pkt->u.request.stub_and_verifier.length -= auth.auth_pad_length;
- talloc_free(ndr);
return NT_STATUS_IS_OK(status);
}
push a signed or sealed dcerpc request packet into a blob
*/
bool dcesrv_auth_response(struct dcesrv_call_state *call,
- DATA_BLOB *blob, struct ncacn_packet *pkt)
+ DATA_BLOB *blob, size_t sig_size,
+ struct ncacn_packet *pkt)
{
struct dcesrv_connection *dce_conn = call->conn;
NTSTATUS status;
DATA_BLOB creds2;
/* non-signed packets are simple */
- if (!dce_conn->auth_state.auth_info || !dce_conn->auth_state.gensec_security) {
+ if (sig_size == 0) {
status = ncacn_push_auth(blob, call, lp_iconv_convenience(dce_conn->dce_ctx->lp_ctx), pkt, NULL);
return NT_STATUS_IS_OK(status);
}
+ switch (dce_conn->auth_state.auth_info->auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ break;
+
+ case DCERPC_AUTH_LEVEL_CONNECT:
+ /*
+ * TODO: let the gensec mech decide if it wants to generate a signature
+ * that might be needed for schannel...
+ */
+ status = ncacn_push_auth(blob, call, lp_iconv_convenience(dce_conn->dce_ctx->lp_ctx), pkt, NULL);
+ return NT_STATUS_IS_OK(status);
+
+ case DCERPC_AUTH_LEVEL_NONE:
+ status = ncacn_push_auth(blob, call, lp_iconv_convenience(dce_conn->dce_ctx->lp_ctx), pkt, NULL);
+ return NT_STATUS_IS_OK(status);
+
+ default:
+ return false;
+ }
+
ndr = ndr_push_init_ctx(call, lp_iconv_convenience(dce_conn->dce_ctx->lp_ctx));
if (!ndr) {
return false;
return false;
}
- /* pad to 16 byte multiple, match win2k3 */
- dce_conn->auth_state.auth_info->auth_pad_length = NDR_ALIGN(ndr, 16);
- ndr_push_zero(ndr, dce_conn->auth_state.auth_info->auth_pad_length);
-
- payload_length = ndr->offset - DCERPC_REQUEST_LENGTH;
+ /* pad to 16 byte multiple in the payload portion of the
+ packet. This matches what w2k3 does. Note that we can't use
+ ndr_push_align() as that is relative to the start of the
+ whole packet, whereas w2k8 wants it relative to the start
+ of the stub */
+ dce_conn->auth_state.auth_info->auth_pad_length =
+ (16 - (pkt->u.response.stub_and_verifier.length & 15)) & 15;
+ ndr_err = ndr_push_zero(ndr, dce_conn->auth_state.auth_info->auth_pad_length);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return false;
+ }
- if (dce_conn->auth_state.auth_info->auth_level == DCERPC_AUTH_LEVEL_CONNECT) {
- status = dcesrv_connect_verifier(call,
- &dce_conn->auth_state.auth_info->credentials);
- if (!NT_STATUS_IS_OK(status)) {
- return false;
- }
- } else {
+ payload_length = pkt->u.response.stub_and_verifier.length +
+ dce_conn->auth_state.auth_info->auth_pad_length;
- /* We hope this length is accruate. If must be if the
- * GENSEC mech does AEAD signing of the packet
- * headers */
- dce_conn->auth_state.auth_info->credentials
- = data_blob_talloc(call, NULL,
- gensec_sig_size(dce_conn->auth_state.gensec_security,
- payload_length));
- data_blob_clear(&dce_conn->auth_state.auth_info->credentials);
- }
+ /* we start without signature, it will appended later */
+ dce_conn->auth_state.auth_info->credentials = data_blob(NULL, 0);
/* add the auth verifier */
ndr_err = ndr_push_dcerpc_auth(ndr, NDR_SCALARS|NDR_BUFFERS,
/* extract the whole packet as a blob */
*blob = ndr_push_blob(ndr);
- /* fill in the fragment length and auth_length, we can't fill
- in these earlier as we don't know the signature length (it
- could be variable length) */
- dcerpc_set_frag_length(blob, blob->length);
-
- /* We hope this value is accruate. If must be if the GENSEC
- * mech does AEAD signing of the packet headers */
- dcerpc_set_auth_length(blob, dce_conn->auth_state.auth_info->credentials.length);
+ /*
+ * Setup the frag and auth length in the packet buffer.
+ * This is needed if the GENSEC mech does AEAD signing
+ * of the packet headers. The signature itself will be
+ * appended later.
+ */
+ dcerpc_set_frag_length(blob, blob->length + sig_size);
+ dcerpc_set_auth_length(blob, sig_size);
/* sign or seal the packet */
switch (dce_conn->auth_state.auth_info->auth_level) {
ndr->data + DCERPC_REQUEST_LENGTH,
payload_length,
blob->data,
- blob->length - dce_conn->auth_state.auth_info->credentials.length,
+ blob->length,
&creds2);
-
- if (NT_STATUS_IS_OK(status)) {
- blob->length -= dce_conn->auth_state.auth_info->credentials.length;
- if (!data_blob_append(call, blob, creds2.data, creds2.length))
- status = NT_STATUS_NO_MEMORY;
- else
- status = NT_STATUS_OK;
- }
-
- /* If we did AEAD signing of the packet headers, then we hope
- * this value didn't change... */
- dcerpc_set_auth_length(blob, creds2.length);
- dcerpc_set_frag_length(blob, dcerpc_get_frag_length(blob)+creds2.length);
- data_blob_free(&creds2);
break;
case DCERPC_AUTH_LEVEL_INTEGRITY:
ndr->data + DCERPC_REQUEST_LENGTH,
payload_length,
blob->data,
- blob->length - dce_conn->auth_state.auth_info->credentials.length,
+ blob->length,
&creds2);
- if (NT_STATUS_IS_OK(status)) {
- blob->length -= dce_conn->auth_state.auth_info->credentials.length;
- if (!data_blob_append(call, blob, creds2.data, creds2.length))
- status = NT_STATUS_NO_MEMORY;
- else
- status = NT_STATUS_OK;
- }
-
- /* If we did AEAD signing of the packet headers, then we hope
- * this value didn't change... */
- dcerpc_set_auth_length(blob, creds2.length);
- dcerpc_set_frag_length(blob, dcerpc_get_frag_length(blob)+creds2.length);
- data_blob_free(&creds2);
- break;
-
- case DCERPC_AUTH_LEVEL_CONNECT:
break;
default:
break;
}
- data_blob_free(&dce_conn->auth_state.auth_info->credentials);
-
if (!NT_STATUS_IS_OK(status)) {
return false;
}
+ if (creds2.length != sig_size) {
+ DEBUG(3,("dcesrv_auth_response: creds2.length[%u] != sig_size[%u] pad[%u] stub[%u]\n",
+ (unsigned)creds2.length, (uint32_t)sig_size,
+ (unsigned)dce_conn->auth_state.auth_info->auth_pad_length,
+ (unsigned)pkt->u.response.stub_and_verifier.length));
+ dcerpc_set_frag_length(blob, blob->length + creds2.length);
+ dcerpc_set_auth_length(blob, creds2.length);
+ }
+
+ if (!data_blob_append(call, blob, creds2.data, creds2.length)) {
+ status = NT_STATUS_NO_MEMORY;
+ return false;
+ }
+ data_blob_free(&creds2);
+
return true;
}
git.samba.org / ira / wip.git / blobdiff