Line data Source code
1 : /**
2 : * Copyright Notice:
3 : * Copyright 2025 DMTF. All rights reserved.
4 : * License: BSD 3-Clause License. For full text see link: https://github.com/DMTF/libspdm/blob/main/LICENSE.md
5 : **/
6 :
7 : #include "internal/libspdm_responder_lib.h"
8 : #include "internal/libspdm_secured_message_lib.h"
9 :
10 : #if LIBSPDM_EVENT_RECIPIENT_SUPPORT
11 :
12 12 : libspdm_return_t libspdm_get_response_send_event(libspdm_context_t *spdm_context,
13 : size_t request_size,
14 : const void *request,
15 : size_t *response_size,
16 : void *response)
17 : {
18 : const spdm_send_event_request_t *spdm_request;
19 : spdm_event_ack_response_t *spdm_response;
20 : libspdm_session_info_t *session_info;
21 : libspdm_session_state_t session_state;
22 : uint32_t session_id;
23 : uint64_t index;
24 : uint32_t prev_event_instance_id;
25 : uint32_t event_instance_id_min;
26 : uint32_t event_instance_id_max;
27 : bool events_list_is_sequential;
28 : const uint8_t *ptr;
29 12 : const uint8_t *end_ptr = (const uint8_t *)request + request_size;
30 : size_t calculated_request_size;
31 :
32 12 : spdm_request = (const spdm_send_event_request_t *)request;
33 :
34 : /* -=[Check Parameters Phase]=- */
35 12 : LIBSPDM_ASSERT(spdm_request->header.request_response_code == SPDM_SEND_EVENT);
36 :
37 12 : if (libspdm_get_connection_version(spdm_context) < SPDM_MESSAGE_VERSION_13) {
38 1 : return libspdm_generate_error_response(spdm_context,
39 : SPDM_ERROR_CODE_UNSUPPORTED_REQUEST,
40 : SPDM_SEND_EVENT,
41 : response_size, response);
42 : }
43 :
44 11 : if (spdm_request->header.spdm_version != libspdm_get_connection_version(spdm_context)) {
45 1 : return libspdm_generate_error_response(spdm_context,
46 : SPDM_ERROR_CODE_VERSION_MISMATCH, 0,
47 : response_size, response);
48 : }
49 10 : if (spdm_context->response_state != LIBSPDM_RESPONSE_STATE_NORMAL) {
50 0 : return libspdm_responder_handle_response_state(
51 : spdm_context,
52 0 : spdm_request->header.request_response_code,
53 : response_size, response);
54 : }
55 :
56 10 : if (!libspdm_is_capabilities_flag_supported(
57 : spdm_context, false,
58 : SPDM_GET_CAPABILITIES_REQUEST_FLAGS_EVENT_CAP, 0)) {
59 1 : return libspdm_generate_error_response(
60 : spdm_context, SPDM_ERROR_CODE_UNSUPPORTED_REQUEST,
61 : SPDM_SEND_EVENT, response_size, response);
62 : }
63 9 : if (spdm_context->connection_info.connection_state < LIBSPDM_CONNECTION_STATE_NEGOTIATED) {
64 0 : return libspdm_generate_error_response(spdm_context,
65 : SPDM_ERROR_CODE_UNEXPECTED_REQUEST,
66 : 0, response_size, response);
67 : }
68 :
69 9 : if (!spdm_context->last_spdm_request_session_id_valid) {
70 0 : if (libspdm_get_connection_version(spdm_context) >= SPDM_MESSAGE_VERSION_12) {
71 0 : return libspdm_generate_error_response(spdm_context,
72 : SPDM_ERROR_CODE_SESSION_REQUIRED, 0,
73 : response_size, response);
74 : } else {
75 0 : return libspdm_generate_error_response(spdm_context,
76 : SPDM_ERROR_CODE_UNSPECIFIED, 0,
77 : response_size, response);
78 : }
79 : }
80 9 : session_id = spdm_context->last_spdm_request_session_id;
81 9 : session_info = libspdm_get_session_info_via_session_id(spdm_context, session_id);
82 9 : if (session_info == NULL) {
83 0 : if (libspdm_get_connection_version(spdm_context) >= SPDM_MESSAGE_VERSION_12) {
84 0 : return libspdm_generate_error_response(spdm_context,
85 : SPDM_ERROR_CODE_SESSION_REQUIRED, 0,
86 : response_size, response);
87 : } else {
88 0 : return libspdm_generate_error_response(spdm_context,
89 : SPDM_ERROR_CODE_UNSPECIFIED, 0,
90 : response_size, response);
91 : }
92 : }
93 9 : session_state = libspdm_secured_message_get_session_state(
94 : session_info->secured_message_context);
95 9 : if (session_state != LIBSPDM_SESSION_STATE_ESTABLISHED) {
96 0 : return libspdm_generate_error_response(spdm_context,
97 : SPDM_ERROR_CODE_UNEXPECTED_REQUEST, 0,
98 : response_size, response);
99 : }
100 :
101 :
102 9 : if (!libspdm_check_for_space((const uint8_t *)request, end_ptr,
103 : sizeof(spdm_send_event_request_t))) {
104 0 : return libspdm_generate_error_response(
105 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
106 : }
107 :
108 9 : if (spdm_request->event_count == 0) {
109 1 : return libspdm_generate_error_response(
110 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
111 : }
112 :
113 8 : ptr = (const uint8_t *)(spdm_request + 1);
114 :
115 8 : event_instance_id_min = UINT32_MAX;
116 8 : event_instance_id_max = 0;
117 8 : events_list_is_sequential = true;
118 :
119 8 : calculated_request_size = sizeof(spdm_send_event_request_t);
120 :
121 : /* Parse and validate all events for size and fields. */
122 22 : for (index = 0; index < spdm_request->event_count; index++) {
123 : uint32_t event_instance_id;
124 : uint8_t svh_id;
125 : uint8_t svh_vendor_id_len;
126 : uint16_t event_type_id;
127 : uint16_t event_detail_len;
128 :
129 15 : if (!libspdm_check_for_space(ptr, end_ptr,
130 : sizeof(uint32_t) + sizeof(uint32_t) + sizeof(uint8_t) +
131 : sizeof(uint8_t))) {
132 1 : return libspdm_generate_error_response(
133 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
134 : }
135 :
136 14 : event_instance_id = libspdm_read_uint32(ptr);
137 :
138 14 : if ((index != 0) && events_list_is_sequential) {
139 6 : if (event_instance_id != (prev_event_instance_id + 1)) {
140 2 : events_list_is_sequential = false;
141 : }
142 : }
143 14 : if (event_instance_id < event_instance_id_min) {
144 9 : event_instance_id_min = event_instance_id;
145 : }
146 14 : if (event_instance_id > event_instance_id_max) {
147 13 : event_instance_id_max = event_instance_id;
148 : }
149 14 : prev_event_instance_id = event_instance_id;
150 :
151 14 : ptr += sizeof(uint32_t) + sizeof(uint32_t);
152 14 : svh_id = *ptr;
153 14 : ptr += sizeof(uint8_t);
154 14 : svh_vendor_id_len = *ptr;
155 14 : ptr += sizeof(uint8_t);
156 :
157 14 : if (!libspdm_validate_svh_vendor_id_len(svh_id, svh_vendor_id_len)) {
158 0 : return libspdm_generate_error_response(
159 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
160 : }
161 :
162 14 : if (!libspdm_check_for_space(
163 14 : ptr, end_ptr, (size_t)svh_vendor_id_len + sizeof(uint16_t) + sizeof(uint16_t))) {
164 0 : return libspdm_generate_error_response(
165 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
166 : }
167 :
168 14 : ptr += svh_vendor_id_len;
169 :
170 14 : event_type_id = libspdm_read_uint16(ptr);
171 14 : ptr += sizeof(uint16_t);
172 14 : event_detail_len = libspdm_read_uint16(ptr);
173 14 : ptr += sizeof(uint16_t);
174 :
175 14 : if (svh_id == SPDM_REGISTRY_ID_DMTF) {
176 14 : if (!libspdm_validate_dmtf_event_type(event_type_id, event_detail_len)) {
177 0 : return libspdm_generate_error_response(
178 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
179 : }
180 : }
181 :
182 14 : if (!libspdm_check_for_space(ptr, end_ptr, (size_t)event_detail_len)) {
183 0 : return libspdm_generate_error_response(
184 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
185 : }
186 :
187 14 : ptr += event_detail_len;
188 14 : calculated_request_size += sizeof(uint32_t) + sizeof(uint32_t) + sizeof(uint8_t) +
189 14 : sizeof(uint8_t) + (size_t)svh_vendor_id_len + sizeof(uint16_t) +
190 14 : sizeof(uint16_t) + (size_t)event_detail_len;
191 : }
192 :
193 : /* Event must be sent in a secure session so message size can be calculated exactly. */
194 7 : if (request_size != calculated_request_size) {
195 1 : return libspdm_generate_error_response(
196 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
197 : }
198 :
199 : /* If event instance IDs are not sequential then ensure there are no gaps or duplicates before
200 : * sending individual events to Integrator. */
201 6 : if (!events_list_is_sequential) {
202 2 : const void *event_data = spdm_request + 1;
203 :
204 2 : if ((event_instance_id_max - event_instance_id_min + 1) != spdm_request->event_count) {
205 1 : return libspdm_generate_error_response(
206 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
207 : }
208 :
209 3 : for (index = 0; index < spdm_request->event_count; index++) {
210 2 : if (libspdm_find_event_instance_id(event_data, spdm_request->event_count,
211 2 : event_instance_id_min + (uint32_t)index) == NULL) {
212 0 : return libspdm_generate_error_response(
213 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
214 : }
215 : }
216 : }
217 :
218 5 : if (spdm_context->process_event != NULL) {
219 5 : const void *next_event_data = spdm_request + 1;
220 :
221 14 : for (index = 0; index < spdm_request->event_count; index++) {
222 10 : if (events_list_is_sequential) {
223 8 : if (!libspdm_parse_and_send_event(
224 : spdm_context, session_id, next_event_data, &next_event_data)) {
225 1 : return libspdm_generate_error_response(
226 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
227 : }
228 : } else {
229 : const void *event_data;
230 :
231 2 : event_data = libspdm_find_event_instance_id(
232 2 : (const void *)next_event_data, spdm_request->event_count,
233 2 : event_instance_id_min + (uint32_t)index);
234 2 : if (event_data == NULL) {
235 0 : return libspdm_generate_error_response(
236 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
237 : }
238 :
239 2 : if (!libspdm_parse_and_send_event(spdm_context, session_id, event_data, NULL)) {
240 0 : return libspdm_generate_error_response(
241 : spdm_context, SPDM_ERROR_CODE_INVALID_REQUEST, 0, response_size, response);
242 : }
243 : }
244 : }
245 : }
246 :
247 4 : spdm_response = (spdm_event_ack_response_t *)response;
248 :
249 4 : spdm_response->header.spdm_version = libspdm_get_connection_version(spdm_context);
250 4 : spdm_response->header.request_response_code = SPDM_EVENT_ACK;
251 4 : spdm_response->header.param1 = 0;
252 4 : spdm_response->header.param2 = 0;
253 :
254 4 : *response_size = sizeof(spdm_event_ack_response_t);
255 :
256 4 : return LIBSPDM_STATUS_SUCCESS;
257 : }
258 :
259 : #endif /* LIBSPDM_EVENT_RECIPIENT_SUPPORT */
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