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authorSimo Sorce <idra@samba.org>2010-07-19 09:07:22 -0400
committerSimo Sorce <idra@samba.org>2010-07-28 12:14:59 -0400
commit6f5cdf9ae9707cdbc62e0ed5ad2578316796b4b3 (patch)
tree845d26e42396907a06a8daf32a9b78fee8f09e90 /source3
parent1b572493e2ea30b262a0ca1b04e913017a3ac13d (diff)
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s3-dcerpc: Introduce generic helper function to add auth trailer
Diffstat (limited to 'source3')
-rw-r--r--source3/rpc_client/cli_pipe.c144
1 files changed, 78 insertions, 66 deletions
diff --git a/source3/rpc_client/cli_pipe.c b/source3/rpc_client/cli_pipe.c
index 055d1e393b..d04e56207e 100644
--- a/source3/rpc_client/cli_pipe.c
+++ b/source3/rpc_client/cli_pipe.c
@@ -1712,6 +1712,77 @@ static NTSTATUS add_schannel_auth_footer(struct schannel_state *sas,
return NT_STATUS_OK;
}
+static NTSTATUS dcerpc_add_auth_footer(struct pipe_auth_data *auth,
+ size_t pad_len,
+ DATA_BLOB *rpc_out)
+{
+ enum dcerpc_AuthType auth_type;
+ 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) {
+ return NT_STATUS_OK;
+ }
+
+ if (pad_len) {
+ /* Copy the sign/seal padding data. */
+ if (!data_blob_append(NULL, rpc_out, pad, pad_len)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+
+ 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_level,
+ pad_len,
+ 1 /* context id. */,
+ &auth_blob,
+ &auth_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ /* append the header */
+ if (!data_blob_append(NULL, rpc_out,
+ auth_info.data, auth_info.length)) {
+ DEBUG(0, ("Failed to add %u bytes auth blob.\n",
+ (unsigned int)auth_info.length));
+ return NT_STATUS_NO_MEMORY;
+ }
+ data_blob_free(&auth_info);
+
+ /* Generate any auth sign/seal and add the auth footer. */
+ switch (auth->auth_type) {
+ case PIPE_AUTH_TYPE_NONE:
+ 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,
+ auth->auth_level,
+ rpc_out);
+ break;
+ case PIPE_AUTH_TYPE_SCHANNEL:
+ status = add_schannel_auth_footer(auth->a_u.schannel_auth,
+ auth->auth_level,
+ rpc_out);
+ break;
+ default:
+ status = NT_STATUS_INVALID_PARAMETER;
+ break;
+ }
+
+ return status;
+}
+
/*******************************************************************
Calculate how much data we're going to send in this packet, also
work out any sign/seal padding length.
@@ -1877,11 +1948,8 @@ static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
uint8_t flags = 0;
uint32_t ss_padding;
uint32_t data_left;
- char pad[8] = { 0, };
NTSTATUS status;
union dcerpc_payload u;
- DATA_BLOB auth_info;
- DATA_BLOB auth_blob = data_blob_null;
data_left = state->req_data->length - state->req_data_sent;
@@ -1916,77 +1984,21 @@ static NTSTATUS prepare_next_frag(struct rpc_api_pipe_req_state *state,
}
/* explicitly set frag_len here as dcerpc_push_ncacn_packet() can't
- * compute it right for requests */
+ * compute it right for requests because the auth trailer is missing
+ * at this stage */
dcerpc_set_frag_length(&state->rpc_out, frag_len);
- /* Copy in the data, plus any ss padding. */
+ /* Copy in the data. */
if (!data_blob_append(NULL, &state->rpc_out,
state->req_data->data + state->req_data_sent,
data_sent_thistime)) {
return NT_STATUS_NO_MEMORY;
}
- if (ss_padding) {
- /* Copy the sign/seal padding data. */
- if (!data_blob_append(NULL, &state->rpc_out,
- pad, ss_padding)) {
- return NT_STATUS_NO_MEMORY;
- }
- }
-
- switch (state->cli->auth->auth_type) {
- case PIPE_AUTH_TYPE_NONE:
- break;
- case PIPE_AUTH_TYPE_NTLMSSP:
- case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
- case PIPE_AUTH_TYPE_SCHANNEL:
- /* marshall the dcerpc_auth with an actually empty auth_blob.
- * This is needed because the ntmlssp signature includes the
- * auth header */
- status = dcerpc_push_dcerpc_auth(state->rpc_out.data,
- map_pipe_auth_type_to_rpc_auth_type(state->cli->auth->auth_type),
- state->cli->auth->auth_level,
- ss_padding,
- 1 /* context id. */,
- &auth_blob,
- &auth_info);
- if (!NT_STATUS_IS_OK(status)) {
- return status;
- }
-
- /* append the header */
- if (!data_blob_append(NULL, &state->rpc_out,
- auth_info.data, auth_info.length)) {
- DEBUG(0, ("Failed to add %u bytes auth blob.\n",
- (unsigned int)auth_info.length));
- return NT_STATUS_NO_MEMORY;
- }
- data_blob_free(&auth_info);
- break;
-
- default:
- break;
- }
-
- /* Generate any auth sign/seal and add the auth footer. */
- switch (state->cli->auth->auth_type) {
- case PIPE_AUTH_TYPE_NONE:
- status = NT_STATUS_OK;
- break;
- case PIPE_AUTH_TYPE_NTLMSSP:
- case PIPE_AUTH_TYPE_SPNEGO_NTLMSSP:
- status = add_ntlmssp_auth_footer(state->cli->auth->a_u.auth_ntlmssp_state,
- state->cli->auth->auth_level,
- &state->rpc_out);
- break;
- case PIPE_AUTH_TYPE_SCHANNEL:
- status = add_schannel_auth_footer(state->cli->auth->a_u.schannel_auth,
- state->cli->auth->auth_level,
- &state->rpc_out);
- break;
- default:
- status = NT_STATUS_INVALID_PARAMETER;
- break;
+ status = dcerpc_add_auth_footer(state->cli->auth, ss_padding,
+ &state->rpc_out);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
}
state->req_data_sent += data_sent_thistime;