#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 "librpc/crypto/gse.h"
+#include "librpc/crypto/spnego.h"
+#include "auth/gensec/gensec.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_RPC_PARSE
* elements
* @param blob The blob of data to decode
* @param r An empty ncacn_packet, must not be NULL
+* @param bigendian Whether the packet is bignedian encoded
*
* @return a NTSTATUS error code
*/
return NT_STATUS_OK;
}
+/**
+* @brief Calculate how much data we can in a packet, including calculating
+* auth token and pad lengths.
+*
+* @param auth The pipe_auth_data structure for this pipe.
+* @param header_len The length of the packet header
+* @param data_left The data left in the send buffer
+* @param max_xmit_frag The max fragment size.
+* @param pad_alignment The NDR padding size.
+* @param data_to_send [out] The max data we will send in the pdu
+* @param frag_len [out] The total length of the fragment
+* @param auth_len [out] The length of the auth trailer
+* @param pad_len [out] The padding to be applied
+*
+* @return A NT Error status code.
+*/
+NTSTATUS dcerpc_guess_sizes(struct pipe_auth_data *auth,
+ size_t header_len, size_t data_left,
+ size_t max_xmit_frag, size_t pad_alignment,
+ size_t *data_to_send, size_t *frag_len,
+ size_t *auth_len, size_t *pad_len)
+{
+ size_t max_len;
+ size_t mod_len;
+ struct gensec_security *gensec_security;
+ struct schannel_state *schannel_auth;
+ struct spnego_context *spnego_ctx;
+ struct gse_context *gse_ctx;
+ enum spnego_mech auth_type;
+ void *auth_ctx;
+ bool seal = false;
+ NTSTATUS status;
+
+ /* no auth token cases first */
+ switch (auth->auth_level) {
+ case DCERPC_AUTH_LEVEL_NONE:
+ case DCERPC_AUTH_LEVEL_CONNECT:
+ case DCERPC_AUTH_LEVEL_PACKET:
+ max_len = max_xmit_frag - header_len;
+ *data_to_send = MIN(max_len, data_left);
+ *pad_len = 0;
+ *auth_len = 0;
+ *frag_len = header_len + *data_to_send;
+ return NT_STATUS_OK;
+
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ seal = true;
+ break;
+
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ break;
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+
+ /* Sign/seal case, calculate auth and pad lengths */
+
+ max_len = max_xmit_frag - header_len - DCERPC_AUTH_TRAILER_LENGTH;
+
+ /* Treat the same for all authenticated rpc requests. */
+ switch (auth->auth_type) {
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ spnego_ctx = talloc_get_type_abort(auth->auth_ctx,
+ struct spnego_context);
+ status = spnego_get_negotiated_mech(spnego_ctx,
+ &auth_type, &auth_ctx);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ switch (auth_type) {
+ case SPNEGO_NTLMSSP:
+ gensec_security = talloc_get_type_abort(auth_ctx,
+ struct gensec_security);
+ *auth_len = gensec_sig_size(gensec_security, max_len);
+ break;
+
+ case SPNEGO_KRB5:
+ gse_ctx = talloc_get_type_abort(auth_ctx,
+ struct gse_context);
+ if (!gse_ctx) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ *auth_len = gse_get_signature_length(gse_ctx,
+ seal, max_len);
+ break;
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+ break;
+
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ case DCERPC_AUTH_TYPE_KRB5:
+ gensec_security = talloc_get_type_abort(auth->auth_ctx,
+ struct gensec_security);
+ *auth_len = gensec_sig_size(gensec_security, max_len);
+ break;
+
+ case DCERPC_AUTH_TYPE_SCHANNEL:
+ schannel_auth = talloc_get_type_abort(auth->auth_ctx,
+ struct schannel_state);
+ *auth_len = netsec_outgoing_sig_size(schannel_auth);
+ break;
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ max_len -= *auth_len;
+
+ *data_to_send = MIN(max_len, data_left);
+
+ mod_len = (header_len + *data_to_send) % pad_alignment;
+ if (mod_len) {
+ *pad_len = pad_alignment - mod_len;
+ } else {
+ *pad_len = 0;
+ }
+
+ if (*data_to_send + *pad_len > max_len) {
+ *data_to_send -= pad_alignment;
+ }
+
+ *frag_len = header_len + *data_to_send + *pad_len
+ + DCERPC_AUTH_TRAILER_LENGTH + *auth_len;
+
+ return NT_STATUS_OK;
+}
+
/*******************************************************************
Create and add the NTLMSSP sign/seal auth data.
********************************************************************/
-static NTSTATUS add_ntlmssp_auth_footer(struct auth_ntlmssp_state *auth_state,
+static NTSTATUS add_generic_auth_footer(struct gensec_security *gensec_security,
enum dcerpc_AuthLevel auth_level,
DATA_BLOB *rpc_out)
{
DATA_BLOB auth_blob;
NTSTATUS status;
- if (!auth_state) {
+ if (!gensec_security) {
return NT_STATUS_INVALID_PARAMETER;
}
switch (auth_level) {
case DCERPC_AUTH_LEVEL_PRIVACY:
/* Data portion is encrypted. */
- status = auth_ntlmssp_seal_packet(auth_state,
- rpc_out->data,
- rpc_out->data
- + DCERPC_RESPONSE_LENGTH,
- data_and_pad_len,
- rpc_out->data,
- rpc_out->length,
- &auth_blob);
+ status = gensec_seal_packet(gensec_security,
+ rpc_out->data,
+ rpc_out->data
+ + DCERPC_RESPONSE_LENGTH,
+ data_and_pad_len,
+ rpc_out->data,
+ rpc_out->length,
+ &auth_blob);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
case DCERPC_AUTH_LEVEL_INTEGRITY:
/* Data is signed. */
- status = auth_ntlmssp_sign_packet(auth_state,
- rpc_out->data,
- rpc_out->data
- + DCERPC_RESPONSE_LENGTH,
- data_and_pad_len,
- rpc_out->data,
- rpc_out->length,
- &auth_blob);
+ status = gensec_sign_packet(gensec_security,
+ rpc_out->data,
+ rpc_out->data
+ + DCERPC_RESPONSE_LENGTH,
+ data_and_pad_len,
+ rpc_out->data,
+ rpc_out->length,
+ &auth_blob);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
return NT_STATUS_OK;
}
+/*******************************************************************
+ Check/unseal the NTLMSSP auth data. (Unseal in place).
+ ********************************************************************/
+
+static NTSTATUS get_generic_auth_footer(struct gensec_security *gensec_security,
+ enum dcerpc_AuthLevel auth_level,
+ DATA_BLOB *data, DATA_BLOB *full_pkt,
+ DATA_BLOB *auth_token)
+{
+ switch (auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ /* Data portion is encrypted. */
+ return gensec_unseal_packet(gensec_security,
+ data->data,
+ data->length,
+ full_pkt->data,
+ full_pkt->length,
+ auth_token);
+
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ /* Data is signed. */
+ return gensec_check_packet(gensec_security,
+ data->data,
+ data->length,
+ full_pkt->data,
+ full_pkt->length,
+ auth_token);
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+}
+
/*******************************************************************
Create and add the schannel sign/seal auth data.
********************************************************************/
return NT_STATUS_OK;
}
+/*******************************************************************
+ Check/unseal the Schannel auth data. (Unseal in place).
+ ********************************************************************/
+
+static NTSTATUS get_schannel_auth_footer(TALLOC_CTX *mem_ctx,
+ struct schannel_state *auth_state,
+ enum dcerpc_AuthLevel auth_level,
+ DATA_BLOB *data, DATA_BLOB *full_pkt,
+ DATA_BLOB *auth_token)
+{
+ switch (auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ /* Data portion is encrypted. */
+ return netsec_incoming_packet(auth_state,
+ true,
+ data->data,
+ data->length,
+ auth_token);
+
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ /* Data is signed. */
+ return netsec_incoming_packet(auth_state,
+ false,
+ data->data,
+ data->length,
+ auth_token);
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+}
+
+/*******************************************************************
+ Create and add the spnego-negotiated sign/seal auth data.
+ ********************************************************************/
+
+static NTSTATUS add_spnego_auth_footer(struct spnego_context *spnego_ctx,
+ enum dcerpc_AuthLevel auth_level,
+ DATA_BLOB *rpc_out)
+{
+ DATA_BLOB auth_blob;
+ DATA_BLOB rpc_data;
+ NTSTATUS status;
+
+ if (!spnego_ctx) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ rpc_data = data_blob_const(rpc_out->data
+ + DCERPC_RESPONSE_LENGTH,
+ rpc_out->length
+ - DCERPC_RESPONSE_LENGTH
+ - DCERPC_AUTH_TRAILER_LENGTH);
+
+ switch (auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ /* Data portion is encrypted. */
+ status = spnego_seal(rpc_out->data, spnego_ctx,
+ &rpc_data, rpc_out, &auth_blob);
+ break;
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ break;
+
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ /* Data is signed. */
+ status = spnego_sign(rpc_out->data, spnego_ctx,
+ &rpc_data, rpc_out, &auth_blob);
+ break;
+
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ break;
+
+ default:
+ /* Can't happen. */
+ smb_panic("bad auth level");
+ /* Notreached. */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /* Finally attach the blob. */
+ if (!data_blob_append(NULL, rpc_out,
+ auth_blob.data, auth_blob.length)) {
+ DEBUG(0, ("Failed to add %u bytes auth blob.\n",
+ (unsigned int)auth_blob.length));
+ return NT_STATUS_NO_MEMORY;
+ }
+ data_blob_free(&auth_blob);
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS get_spnego_auth_footer(TALLOC_CTX *mem_ctx,
+ struct spnego_context *sp_ctx,
+ enum dcerpc_AuthLevel auth_level,
+ DATA_BLOB *data, DATA_BLOB *full_pkt,
+ DATA_BLOB *auth_token)
+{
+ switch (auth_level) {
+ case DCERPC_AUTH_LEVEL_PRIVACY:
+ /* Data portion is encrypted. */
+ return spnego_unseal(mem_ctx, sp_ctx,
+ data, full_pkt, auth_token);
+
+ case DCERPC_AUTH_LEVEL_INTEGRITY:
+ /* Data is signed. */
+ return spnego_sigcheck(mem_ctx, sp_ctx,
+ data, full_pkt, auth_token);
+
+ default:
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+}
+
/**
* @brief Append an auth footer according to what is the current mechanism
*
NTSTATUS dcerpc_add_auth_footer(struct pipe_auth_data *auth,
size_t pad_len, DATA_BLOB *rpc_out)
{
- enum dcerpc_AuthType auth_type;
+ struct schannel_state *schannel_auth;
+ struct gensec_security *gensec_security;
+ struct spnego_context *spnego_ctx;
char pad[CLIENT_NDR_PADDING_SIZE] = { 0, };
DATA_BLOB auth_info;
DATA_BLOB auth_blob;
NTSTATUS status;
- if (auth->auth_type == PIPE_AUTH_TYPE_NONE) {
+ if (auth->auth_type == DCERPC_AUTH_TYPE_NONE ||
+ auth->auth_type == DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM) {
return NT_STATUS_OK;
}
}
}
- auth_type = map_pipe_auth_type_to_rpc_auth_type(auth->auth_type);
-
/* marshall the dcerpc_auth with an actually empty auth_blob.
* This is needed because the ntmlssp signature includes the
* auth header. We will append the actual blob later. */
auth_blob = data_blob_null;
status = dcerpc_push_dcerpc_auth(rpc_out->data,
- auth_type,
+ auth->auth_type,
auth->auth_level,
pad_len,
1 /* context id. */,
/* Generate any auth sign/seal and add the auth footer. */
switch (auth->auth_type) {
- case PIPE_AUTH_TYPE_NONE:
+ case DCERPC_AUTH_TYPE_NONE:
+ case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
status = NT_STATUS_OK;
break;
- case PIPE_AUTH_TYPE_NTLMSSP:
- case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
- status = add_ntlmssp_auth_footer(auth->a_u.auth_ntlmssp_state,
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ spnego_ctx = talloc_get_type_abort(auth->auth_ctx,
+ struct spnego_context);
+ status = add_spnego_auth_footer(spnego_ctx,
+ auth->auth_level, rpc_out);
+ break;
+ case DCERPC_AUTH_TYPE_KRB5:
+ case DCERPC_AUTH_TYPE_NTLMSSP:
+ gensec_security = talloc_get_type_abort(auth->auth_ctx,
+ struct gensec_security);
+ status = add_generic_auth_footer(gensec_security,
auth->auth_level,
rpc_out);
break;
- case PIPE_AUTH_TYPE_SCHANNEL:
- status = add_schannel_auth_footer(auth->a_u.schannel_auth,
+ case DCERPC_AUTH_TYPE_SCHANNEL:
+ schannel_auth = talloc_get_type_abort(auth->auth_ctx,
+ struct schannel_state);
+ status = add_schannel_auth_footer(schannel_auth,
auth->auth_level,
rpc_out);
break;
DATA_BLOB *raw_pkt,
size_t *pad_len)
{
+ struct schannel_state *schannel_auth;
+ struct gensec_security *gensec_security;
+ struct spnego_context *spnego_ctx;
NTSTATUS status;
struct dcerpc_auth auth_info;
uint32_t auth_length;
if (pkt->auth_length > pkt->frag_length) {
return NT_STATUS_INFO_LENGTH_MISMATCH;
}
- if ((pkt->auth_length
- + DCERPC_AUTH_TRAILER_LENGTH < pkt->auth_length) ||
- (pkt->auth_length
+ if (((unsigned int)pkt->auth_length
+ + DCERPC_AUTH_TRAILER_LENGTH < (unsigned int)pkt->auth_length) ||
+ ((unsigned int)pkt->auth_length
+ DCERPC_AUTH_TRAILER_LENGTH < DCERPC_AUTH_TRAILER_LENGTH)) {
/* Integer wrap attempt. */
return NT_STATUS_INFO_LENGTH_MISMATCH;
raw_pkt->length - auth_info.credentials.length);
switch (auth->auth_type) {
- case PIPE_AUTH_TYPE_NONE:
+ case DCERPC_AUTH_TYPE_NONE:
+ case DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM:
return NT_STATUS_OK;
- case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
- case PIPE_AUTH_TYPE_NTLMSSP:
-
- DEBUG(10, ("NTLMSSP auth\n"));
-
- if (!auth->a_u.auth_ntlmssp_state) {
- DEBUG(0, ("Invalid auth level, "
- "failed to process packet auth.\n"));
- return NT_STATUS_INVALID_PARAMETER;
+ case DCERPC_AUTH_TYPE_SPNEGO:
+ spnego_ctx = talloc_get_type_abort(auth->auth_ctx,
+ struct spnego_context);
+ status = get_spnego_auth_footer(pkt, spnego_ctx,
+ auth->auth_level,
+ &data, &full_pkt,
+ &auth_info.credentials);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
+ break;
- switch (auth->auth_level) {
- case DCERPC_AUTH_LEVEL_PRIVACY:
- status = auth_ntlmssp_unseal_packet(
- auth->a_u.auth_ntlmssp_state,
- data.data, data.length,
- full_pkt.data, full_pkt.length,
- &auth_info.credentials);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- memcpy(pkt_trailer->data, data.data, data.length);
- break;
+ case DCERPC_AUTH_TYPE_KRB5:
+ case DCERPC_AUTH_TYPE_NTLMSSP:
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- status = auth_ntlmssp_check_packet(
- auth->a_u.auth_ntlmssp_state,
- data.data, data.length,
- full_pkt.data, full_pkt.length,
- &auth_info.credentials);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- break;
+ DEBUG(10, ("GENSEC auth\n"));
- default:
- DEBUG(0, ("Invalid auth level, "
- "failed to process packet auth.\n"));
- return NT_STATUS_INVALID_PARAMETER;
+ gensec_security = talloc_get_type_abort(auth->auth_ctx,
+ struct gensec_security);
+ status = get_generic_auth_footer(gensec_security,
+ auth->auth_level,
+ &data, &full_pkt,
+ &auth_info.credentials);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
break;
- case PIPE_AUTH_TYPE_SCHANNEL:
+ case DCERPC_AUTH_TYPE_SCHANNEL:
DEBUG(10, ("SCHANNEL auth\n"));
- switch (auth->auth_level) {
- case DCERPC_AUTH_LEVEL_PRIVACY:
- status = netsec_incoming_packet(
- auth->a_u.schannel_auth,
- pkt, true,
- data.data, data.length,
- &auth_info.credentials);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- memcpy(pkt_trailer->data, data.data, data.length);
- break;
-
- case DCERPC_AUTH_LEVEL_INTEGRITY:
- status = netsec_incoming_packet(
- auth->a_u.schannel_auth,
- pkt, false,
- data.data, data.length,
- &auth_info.credentials);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
- break;
-
- default:
- DEBUG(0, ("Invalid auth level, "
- "failed to process packet auth.\n"));
- return NT_STATUS_INVALID_PARAMETER;
+ schannel_auth = talloc_get_type_abort(auth->auth_ctx,
+ struct schannel_state);
+ status = get_schannel_auth_footer(pkt, schannel_auth,
+ auth->auth_level,
+ &data, &full_pkt,
+ &auth_info.credentials);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
break;
return NT_STATUS_INVALID_PARAMETER;
}
+ /* TODO: remove later
+ * this is still needed because in the server code the
+ * pkt_trailer actually has a copy of the raw data, and they
+ * are still both used in later calls */
+ if (auth->auth_level == DCERPC_AUTH_LEVEL_PRIVACY) {
+ memcpy(pkt_trailer->data, data.data, data.length);
+ }
+
*pad_len = auth_info.auth_pad_length;
data_blob_free(&auth_info.credentials);
return NT_STATUS_OK;
git.samba.org / metze / samba / wip.git / blobdiff