+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
-
- HTTP library
-
- Copyright (C) 2014 Samuel Cabrero <samuelcabrero@kernevil.me>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "http.h"
-#include "http_internal.h"
-#include "lib/util/tevent_ntstatus.h"
-#include "lib/param/param.h"
-#include "tevent.h"
-#include "auth/gensec/gensec.h"
-#include "auth/credentials/credentials.h"
-#include "lib/util/data_blob.h"
-
-/**
- * Copy the request headers from src to dst
- */
-static NTSTATUS http_copy_header(const struct http_request *src,
- struct http_request *dst)
-{
- struct http_header *h;
-
- dst->type = src->type;
- dst->major = src->major;
- dst->minor = src->minor;
- dst->uri = talloc_strdup(dst, src->uri);
-
- for (h = src->headers; h != NULL; h = h->next) {
- http_add_header(dst, &dst->headers, h->key, h->value);
- }
- dst->headers_size = src->headers_size;
-
- return NT_STATUS_OK;
-}
-
-/*
- * Retrieve the WWW-Authenticate header from server response based on the
- * authentication scheme being used.
- */
-static NTSTATUS http_parse_auth_response(const DATA_BLOB prefix,
- struct http_request *auth_response,
- DATA_BLOB *in)
-{
- struct http_header *h;
-
- for (h = auth_response->headers; h != NULL; h = h->next) {
- int cmp;
-
- cmp = strcasecmp(h->key, "WWW-Authenticate");
- if (cmp != 0) {
- continue;
- }
-
- cmp = strncasecmp(h->value,
- (const char *)prefix.data,
- prefix.length);
- if (cmp != 0) {
- continue;
- }
-
- *in = data_blob_string_const(h->value);
- return NT_STATUS_OK;
- }
-
- return NT_STATUS_NOT_SUPPORTED;
-}
-
-struct http_auth_state {
- struct tevent_context *ev;
-
- struct http_conn *http_conn;
-
- enum http_auth_method auth;
- DATA_BLOB prefix;
-
- struct gensec_security *gensec_ctx;
- NTSTATUS gensec_status;
-
- const struct http_request *original_request;
- struct http_request *next_request;
- struct http_request *auth_response;
-};
-
-
-static void http_send_auth_request_gensec_done(struct tevent_req *subreq);
-static void http_send_auth_request_http_req_done(struct tevent_req *subreq);
-static void http_send_auth_request_http_rep_done(struct tevent_req *subreq);
-
-struct tevent_req *http_send_auth_request_send(TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- struct http_conn *http_conn,
- const struct http_request *original_request,
- struct cli_credentials *credentials,
- struct loadparm_context *lp_ctx,
- enum http_auth_method auth)
-{
- struct tevent_req *req = NULL;
- struct http_auth_state *state = NULL;
- struct tevent_req *subreq = NULL;
- DATA_BLOB gensec_in = data_blob_null;
- NTSTATUS status;
- struct http_header *h = NULL;
- const char *mech_name = NULL;
-
- req = tevent_req_create(mem_ctx, &state, struct http_auth_state);
- if (req == NULL) {
- return NULL;
- }
- state->ev = ev;
- state->http_conn = http_conn;
- state->auth = auth;
- state->original_request = original_request;
-
- status = gensec_init();
- if (tevent_req_nterror(req, status)) {
- return tevent_req_post(req, ev);
- }
-
- status = gensec_client_start(state, &state->gensec_ctx,
- lpcfg_gensec_settings(state, lp_ctx));
- if (tevent_req_nterror(req, status)) {
- return tevent_req_post(req, ev);
- }
-
- status = gensec_set_credentials(state->gensec_ctx, credentials);
- if (tevent_req_nterror(req, status)) {
- return tevent_req_post(req, ev);
- }
-
- for (h = original_request->headers; h != NULL; h = h->next) {
- int cmp;
-
- cmp = strcasecmp(h->key, "Host");
- if (cmp != 0) {
- continue;
- }
-
- status = gensec_set_target_service(state->gensec_ctx, "http");
- if (tevent_req_nterror(req, status)) {
- return tevent_req_post(req, ev);
- }
-
- status = gensec_set_target_hostname(state->gensec_ctx, h->value);
- if (tevent_req_nterror(req, status)) {
- return tevent_req_post(req, ev);
- }
- break;
- }
-
- switch (state->auth) {
- case HTTP_AUTH_BASIC:
- mech_name = "http_basic";
- state->prefix = data_blob_string_const("Basic");
- break;
- case HTTP_AUTH_NTLM:
- mech_name = "http_ntlm";
- state->prefix = data_blob_string_const("NTLM");
- break;
- case HTTP_AUTH_NEGOTIATE:
- mech_name = "http_negotiate";
- state->prefix = data_blob_string_const("Negotiate");
- break;
- default:
- tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
- return tevent_req_post(req, ev);
- }
-
- status = gensec_start_mech_by_name(state->gensec_ctx, mech_name);
- if (tevent_req_nterror(req, status)) {
- return tevent_req_post(req, ev);
- }
-
- subreq = gensec_update_send(state, state->ev,
- state->gensec_ctx,
- gensec_in);
- if (tevent_req_nomem(subreq, req)) {
- return tevent_req_post(req, ev);
- }
- tevent_req_set_callback(subreq, http_send_auth_request_gensec_done, req);
-
- return req;
-}
-
-static void http_send_auth_request_gensec_done(struct tevent_req *subreq)
-{
- struct tevent_req *req =
- tevent_req_callback_data(subreq,
- struct tevent_req);
- struct http_auth_state *state =
- tevent_req_data(req,
- struct http_auth_state);
- DATA_BLOB gensec_out = data_blob_null;
- NTSTATUS status;
- int ret;
-
- TALLOC_FREE(state->auth_response);
-
- status = gensec_update_recv(subreq, state, &gensec_out);
- TALLOC_FREE(subreq);
- state->gensec_status = status;
- if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
- status = NT_STATUS_OK;
- }
- if (tevent_req_nterror(req, status)) {
- return;
- }
-
- state->next_request = talloc_zero(state, struct http_request);
- if (tevent_req_nomem(state->next_request, req)) {
- return;
- }
-
- status = http_copy_header(state->original_request, state->next_request);
- if (tevent_req_nterror(req, status)) {
- return;
- }
-
- if (!NT_STATUS_IS_OK(state->gensec_status)) {
- /*
- * More preprocessing required before we
- * can include the content.
- */
- ret = http_replace_header(state->next_request,
- &state->next_request->headers,
- "Content-Length", "0");
- if (ret != 0) {
- tevent_req_oom(req);
- return;
- }
- } else {
- state->next_request->body = state->original_request->body;
- }
-
- if (gensec_out.length > 0) {
- ret = http_add_header(state->next_request,
- &state->next_request->headers,
- "Authorization",
- (char *)gensec_out.data);
- if (ret != 0) {
- tevent_req_oom(req);
- return;
- }
- data_blob_free(&gensec_out);
- }
-
- subreq = http_send_request_send(state, state->ev,
- state->http_conn,
- state->next_request);
- if (tevent_req_nomem(subreq, req)) {
- return;
- }
- tevent_req_set_callback(subreq,
- http_send_auth_request_http_req_done,
- req);
-}
-
-static void http_send_auth_request_http_req_done(struct tevent_req *subreq)
-{
- struct tevent_req *req =
- tevent_req_callback_data(subreq,
- struct tevent_req);
- struct http_auth_state *state =
- tevent_req_data(req,
- struct http_auth_state);
- NTSTATUS status;
-
- TALLOC_FREE(state->next_request);
-
- status = http_send_request_recv(subreq);
- TALLOC_FREE(subreq);
- if (tevent_req_nterror(req, status)) {
- return;
- }
-
- /*
- * If no more processing required, it is done
- *
- * The caller will use http_read_response_send/recv
- * in order to get the high level response.
- */
- if (NT_STATUS_IS_OK(state->gensec_status)) {
- tevent_req_done(req);
- return;
- }
-
- /*
- * If more processing required, read the response from server
- *
- * We may get an empty RPCH Echo packet from the server
- * on the "RPC_OUT_DATA" path. We need to consume this
- * from the socket, but for now we just ignore the bytes.
- */
- subreq = http_read_response_send(state, state->ev,
- state->http_conn,
- UINT16_MAX);
- if (tevent_req_nomem(subreq, req)) {
- return;
- }
- tevent_req_set_callback(subreq,
- http_send_auth_request_http_rep_done,
- req);
-}
-
-static void http_send_auth_request_http_rep_done(struct tevent_req *subreq)
-{
- struct tevent_req *req =
- tevent_req_callback_data(subreq,
- struct tevent_req);
- struct http_auth_state *state =
- tevent_req_data(req,
- struct http_auth_state);
- DATA_BLOB gensec_in = data_blob_null;
- NTSTATUS status;
-
- status = http_read_response_recv(subreq, state,
- &state->auth_response);
- TALLOC_FREE(subreq);
- if (tevent_req_nterror(req, status)) {
- return;
- }
-
- /*
- * We we asked for up to UINT16_MAX bytes of
- * content, we don't expect
- * state->auth_response->remaining_content_length
- * to be set.
- *
- * For now we just ignore any bytes in
- * state->auth_response->body.
- */
- if (state->auth_response->remaining_content_length != 0) {
- tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
- return;
- }
-
- status = http_parse_auth_response(state->prefix,
- state->auth_response,
- &gensec_in);
- if (tevent_req_nterror(req, status)) {
- return;
- }
-
- subreq = gensec_update_send(state, state->ev,
- state->gensec_ctx,
- gensec_in);
- if (tevent_req_nomem(subreq, req)) {
- return;
- }
- tevent_req_set_callback(subreq, http_send_auth_request_gensec_done, req);
-}
-
-NTSTATUS http_send_auth_request_recv(struct tevent_req *req)
-{
- NTSTATUS status;
-
- if (tevent_req_is_nterror(req, &status)) {
- tevent_req_received(req);
- return status;
- }
- tevent_req_received(req);
-
- return NT_STATUS_OK;
-}
git.samba.org / bbaumbach / samba-autobuild / .git / blobdiff