Line data Source code
1 : /**
2 : * Copyright Notice:
3 : * Copyright 2021-2025 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 :
9 : #if (LIBSPDM_ENABLE_CAPABILITY_MUT_AUTH_CAP) && (LIBSPDM_ENABLE_CAPABILITY_ENCAP_CAP) && \
10 : (LIBSPDM_SEND_GET_CERTIFICATE_SUPPORT)
11 :
12 2 : libspdm_return_t libspdm_get_encap_request_get_certificate(libspdm_context_t *spdm_context,
13 : size_t *encap_request_size,
14 : void *encap_request)
15 : {
16 : spdm_get_certificate_large_request_t *spdm_request;
17 : libspdm_return_t status;
18 : uint32_t req_msg_length;
19 : uint32_t req_msg_offset;
20 : bool use_large_cert_chain;
21 : uint32_t req_msg_header_size;
22 :
23 2 : spdm_context->encap_context.last_encap_request_size = 0;
24 :
25 2 : if (libspdm_get_connection_version(spdm_context) < SPDM_MESSAGE_VERSION_11) {
26 0 : return LIBSPDM_STATUS_UNSUPPORTED_CAP;
27 : }
28 :
29 2 : if (!libspdm_is_capabilities_flag_supported(
30 : spdm_context, false,
31 : SPDM_GET_CAPABILITIES_REQUEST_FLAGS_CERT_CAP, 0)) {
32 0 : return LIBSPDM_STATUS_UNSUPPORTED_CAP;
33 : }
34 :
35 2 : if ((libspdm_get_connection_version (spdm_context) >= SPDM_MESSAGE_VERSION_14) &&
36 0 : libspdm_is_capabilities_flag_supported(
37 : spdm_context, false,
38 : SPDM_GET_CAPABILITIES_REQUEST_FLAGS_LARGE_RESP_CAP, 0)) {
39 0 : use_large_cert_chain = true;
40 0 : spdm_context->encap_context.use_large_cert_chain = true;
41 : } else {
42 2 : use_large_cert_chain = false;
43 2 : spdm_context->encap_context.use_large_cert_chain = false;
44 : }
45 :
46 2 : if (use_large_cert_chain) {
47 0 : req_msg_header_size = sizeof(spdm_get_certificate_large_request_t);
48 : } else {
49 2 : req_msg_header_size = sizeof(spdm_get_certificate_request_t);
50 : }
51 :
52 2 : LIBSPDM_ASSERT(*encap_request_size >= req_msg_header_size);
53 2 : *encap_request_size = req_msg_header_size;
54 :
55 2 : spdm_request = encap_request;
56 :
57 2 : spdm_request->header.spdm_version = libspdm_get_connection_version (spdm_context);
58 2 : spdm_request->header.request_response_code = SPDM_GET_CERTIFICATE;
59 2 : spdm_request->header.param1 = spdm_context->encap_context.req_slot_id;
60 2 : spdm_request->header.param2 = 0;
61 2 : req_msg_offset = (uint32_t)spdm_context->mut_auth_cert_chain_buffer_size;
62 2 : req_msg_length = LIBSPDM_MAX_CERT_CHAIN_BLOCK_LEN;
63 2 : if (use_large_cert_chain) {
64 0 : spdm_request->header.param1 |= SPDM_GET_CERTIFICATE_REQUEST_LARGE_CERT_CHAIN;
65 0 : spdm_request->offset = 0;
66 0 : spdm_request->length = 0;
67 0 : spdm_request->large_offset = req_msg_offset;
68 0 : spdm_request->large_length = req_msg_length;
69 : } else {
70 2 : spdm_request->offset = (uint16_t)req_msg_offset;
71 2 : spdm_request->length = (uint16_t)req_msg_length;
72 : }
73 2 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO, "request (offset 0x%x, size 0x%x):\n",
74 : req_msg_offset, req_msg_length));
75 :
76 2 : libspdm_reset_message_buffer_via_request_code(spdm_context, NULL,
77 2 : spdm_request->header.request_response_code);
78 :
79 : /* Cache data*/
80 2 : status = libspdm_append_message_mut_b(spdm_context, spdm_request, *encap_request_size);
81 2 : if (LIBSPDM_STATUS_IS_ERROR(status)) {
82 0 : return LIBSPDM_STATUS_BUFFER_FULL;
83 : }
84 :
85 2 : libspdm_copy_mem(&spdm_context->encap_context.last_encap_request_header,
86 : sizeof(spdm_context->encap_context.last_encap_request_header),
87 2 : &spdm_request->header, sizeof(spdm_message_header_t));
88 2 : spdm_context->encap_context.last_encap_request_size = *encap_request_size;
89 :
90 2 : return LIBSPDM_STATUS_SUCCESS;
91 : }
92 :
93 12 : libspdm_return_t libspdm_process_encap_response_certificate(
94 : libspdm_context_t *spdm_context, size_t encap_response_size,
95 : const void *encap_response, bool *need_continue)
96 : {
97 : const spdm_certificate_large_response_t *spdm_response;
98 : size_t spdm_response_size;
99 : bool result;
100 : libspdm_return_t status;
101 : uint32_t request_offset;
102 : uint8_t slot_id;
103 : uint8_t *cert_chain_buffer;
104 : size_t cert_chain_buffer_size;
105 : size_t cert_chain_buffer_max_size;
106 : uint8_t cert_model;
107 : uint32_t rsp_msg_portion_length;
108 : uint32_t rsp_msg_remainder_length;
109 : bool use_large_cert_chain;
110 : uint32_t rsp_msg_header_size;
111 : uint32_t max_cert_chain_size;
112 :
113 12 : spdm_response = encap_response;
114 12 : spdm_response_size = encap_response_size;
115 :
116 12 : cert_chain_buffer = (uint8_t *)spdm_context->mut_auth_cert_chain_buffer;
117 12 : cert_chain_buffer_size = spdm_context->mut_auth_cert_chain_buffer_size;
118 12 : cert_chain_buffer_max_size = spdm_context->mut_auth_cert_chain_buffer_max_size;
119 :
120 12 : if (spdm_response_size < sizeof(spdm_message_header_t)) {
121 0 : return LIBSPDM_STATUS_INVALID_MSG_SIZE;
122 : }
123 12 : if (spdm_response->header.spdm_version != libspdm_get_connection_version (spdm_context)) {
124 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
125 : }
126 12 : if (spdm_response->header.request_response_code == SPDM_ERROR) {
127 2 : status = libspdm_handle_encap_error_response_main(
128 2 : spdm_context, spdm_response->header.param1);
129 2 : if (LIBSPDM_STATUS_IS_ERROR(status)) {
130 2 : return status;
131 : }
132 10 : } else if (spdm_response->header.request_response_code != SPDM_CERTIFICATE) {
133 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
134 : }
135 10 : use_large_cert_chain = spdm_context->encap_context.use_large_cert_chain;
136 10 : if (use_large_cert_chain) {
137 0 : if ((spdm_response->header.param1 & SPDM_CERTIFICATE_RESPONSE_LARGE_CERT_CHAIN) == 0) {
138 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
139 : }
140 : } else {
141 10 : if ((spdm_response->header.spdm_version >= SPDM_MESSAGE_VERSION_14) &&
142 0 : ((spdm_response->header.param1 & SPDM_CERTIFICATE_RESPONSE_LARGE_CERT_CHAIN) != 0)) {
143 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
144 : }
145 : }
146 :
147 10 : if (use_large_cert_chain) {
148 0 : max_cert_chain_size = SPDM_MAX_CERTIFICATE_CHAIN_SIZE_14;
149 0 : rsp_msg_header_size = sizeof(spdm_certificate_large_response_t);
150 : } else {
151 10 : max_cert_chain_size = SPDM_MAX_CERTIFICATE_CHAIN_SIZE;
152 10 : rsp_msg_header_size = sizeof(spdm_certificate_response_t);
153 : }
154 :
155 10 : if (encap_response_size < rsp_msg_header_size) {
156 0 : return LIBSPDM_STATUS_INVALID_MSG_SIZE;
157 : }
158 10 : if (use_large_cert_chain) {
159 0 : rsp_msg_portion_length = spdm_response->large_portion_length;
160 0 : rsp_msg_remainder_length = spdm_response->large_remainder_length;
161 : } else {
162 10 : rsp_msg_portion_length = spdm_response->portion_length;
163 10 : rsp_msg_remainder_length = spdm_response->remainder_length;
164 : }
165 :
166 10 : if ((rsp_msg_portion_length > LIBSPDM_MAX_CERT_CHAIN_BLOCK_LEN) ||
167 : (rsp_msg_portion_length == 0)) {
168 2 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
169 : }
170 :
171 8 : request_offset = (uint32_t)cert_chain_buffer_size;
172 :
173 8 : if (rsp_msg_portion_length > max_cert_chain_size - request_offset) {
174 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
175 : }
176 8 : if (rsp_msg_remainder_length > max_cert_chain_size - request_offset - rsp_msg_portion_length) {
177 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
178 : }
179 8 : if (request_offset == 0) {
180 8 : spdm_context->encap_context.cert_chain_total_len = rsp_msg_portion_length +
181 : rsp_msg_remainder_length;
182 0 : } else if (spdm_context->encap_context.cert_chain_total_len !=
183 0 : request_offset + rsp_msg_portion_length + rsp_msg_remainder_length) {
184 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
185 : }
186 8 : slot_id = spdm_context->encap_context.req_slot_id;
187 8 : if ((spdm_response->header.param1 & SPDM_CERTIFICATE_RESPONSE_SLOT_ID_MASK) != slot_id) {
188 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
189 : }
190 8 : if (spdm_response->header.spdm_version >= SPDM_MESSAGE_VERSION_13) {
191 6 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO, "cert_info - 0x%02x\n",
192 : spdm_response->header.param2));
193 6 : cert_model = spdm_response->header.param2 &
194 : SPDM_CERTIFICATE_RESPONSE_ATTRIBUTES_CERTIFICATE_INFO_MASK;
195 6 : if (spdm_context->connection_info.multi_key_conn_req) {
196 5 : if (cert_model > SPDM_CERTIFICATE_INFO_CERT_MODEL_GENERIC_CERT) {
197 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
198 : }
199 5 : if ((slot_id == 0) &&
200 : (cert_model == SPDM_CERTIFICATE_INFO_CERT_MODEL_GENERIC_CERT)) {
201 1 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
202 : }
203 4 : if ((cert_model == SPDM_CERTIFICATE_INFO_CERT_MODEL_NONE) &&
204 1 : (spdm_response->portion_length != 0)) {
205 1 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
206 : }
207 : } else {
208 1 : if (cert_model != SPDM_CERTIFICATE_INFO_CERT_MODEL_NONE) {
209 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
210 : }
211 : }
212 4 : if (spdm_context->connection_info.peer_cert_info[slot_id] ==
213 : SPDM_CERTIFICATE_INFO_CERT_MODEL_NONE) {
214 4 : spdm_context->connection_info.peer_cert_info[slot_id] = cert_model;
215 0 : } else if (spdm_context->connection_info.peer_cert_info[slot_id] != cert_model) {
216 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
217 : }
218 : }
219 :
220 6 : if (spdm_response_size < rsp_msg_header_size + rsp_msg_portion_length) {
221 0 : return LIBSPDM_STATUS_INVALID_MSG_SIZE;
222 : }
223 6 : spdm_response_size = rsp_msg_header_size + rsp_msg_portion_length;
224 :
225 : /* Cache data*/
226 :
227 6 : status = libspdm_append_message_mut_b(spdm_context, spdm_response, spdm_response_size);
228 6 : if (LIBSPDM_STATUS_IS_ERROR(status)) {
229 0 : return LIBSPDM_STATUS_BUFFER_FULL;
230 : }
231 :
232 6 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO, "Certificate (offset 0x%x, size 0x%x):\n",
233 : request_offset, rsp_msg_portion_length));
234 6 : LIBSPDM_INTERNAL_DUMP_HEX((const uint8_t *)spdm_response + rsp_msg_header_size,
235 : rsp_msg_portion_length);
236 :
237 6 : if (cert_chain_buffer_size + rsp_msg_portion_length > cert_chain_buffer_max_size) {
238 0 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO, "cert_chain_buffer full\n"));
239 0 : return LIBSPDM_STATUS_BUFFER_FULL;
240 : }
241 :
242 6 : libspdm_copy_mem(cert_chain_buffer + cert_chain_buffer_size,
243 : cert_chain_buffer_max_size - cert_chain_buffer_size,
244 : (const uint8_t *)spdm_response + rsp_msg_header_size,
245 : rsp_msg_portion_length);
246 :
247 6 : cert_chain_buffer_size += rsp_msg_portion_length;
248 6 : spdm_context->mut_auth_cert_chain_buffer_size = cert_chain_buffer_size;
249 :
250 6 : if (rsp_msg_remainder_length != 0) {
251 6 : *need_continue = true;
252 :
253 6 : return LIBSPDM_STATUS_SUCCESS;
254 : }
255 :
256 0 : *need_continue = false;
257 :
258 0 : if (spdm_context->local_context.verify_peer_spdm_cert_chain != NULL) {
259 0 : result = spdm_context->local_context.verify_peer_spdm_cert_chain (
260 0 : spdm_context, spdm_context->encap_context.req_slot_id,
261 : cert_chain_buffer_size, cert_chain_buffer, NULL, NULL);
262 0 : if (!result) {
263 0 : return LIBSPDM_STATUS_VERIF_FAIL;
264 : }
265 : } else {
266 0 : result = libspdm_verify_peer_cert_chain_buffer_integrity(
267 : spdm_context, cert_chain_buffer, cert_chain_buffer_size);
268 0 : if (!result) {
269 0 : return LIBSPDM_STATUS_VERIF_FAIL;
270 : }
271 :
272 : /*verify peer cert chain authority*/
273 0 : result = libspdm_verify_peer_cert_chain_buffer_authority(
274 : spdm_context, cert_chain_buffer, cert_chain_buffer_size, NULL, NULL);
275 0 : if (!result) {
276 0 : status = LIBSPDM_STATUS_VERIF_NO_AUTHORITY;
277 : }
278 : }
279 :
280 0 : spdm_context->connection_info.peer_used_cert_chain_slot_id =
281 0 : spdm_context->encap_context.req_slot_id;
282 0 : slot_id = spdm_context->encap_context.req_slot_id;
283 0 : LIBSPDM_ASSERT(slot_id < SPDM_MAX_SLOT_COUNT);
284 : #if LIBSPDM_RECORD_TRANSCRIPT_DATA_SUPPORT
285 : spdm_context->connection_info.peer_used_cert_chain[slot_id].buffer_size =
286 : cert_chain_buffer_size;
287 :
288 : libspdm_copy_mem(spdm_context->connection_info.peer_used_cert_chain[slot_id].buffer,
289 : sizeof(spdm_context->connection_info.peer_used_cert_chain[slot_id].buffer),
290 : cert_chain_buffer, cert_chain_buffer_size);
291 : #else
292 0 : result = libspdm_hash_all(
293 : spdm_context->connection_info.algorithm.base_hash_algo,
294 : cert_chain_buffer, cert_chain_buffer_size,
295 0 : spdm_context->connection_info.peer_used_cert_chain[slot_id].buffer_hash);
296 0 : if (!result) {
297 0 : return LIBSPDM_STATUS_CRYPTO_ERROR;
298 : }
299 0 : spdm_context->connection_info.peer_used_cert_chain[slot_id].buffer_hash_size =
300 0 : libspdm_get_hash_size(spdm_context->connection_info.algorithm.base_hash_algo);
301 :
302 0 : if (spdm_context->connection_info.algorithm.req_pqc_asym_alg != 0) {
303 0 : result = libspdm_get_pqc_leaf_cert_public_key_from_cert_chain(
304 : spdm_context->connection_info.algorithm.base_hash_algo,
305 : spdm_context->connection_info.algorithm.req_pqc_asym_alg,
306 : cert_chain_buffer, cert_chain_buffer_size,
307 0 : &spdm_context->connection_info.peer_used_cert_chain[slot_id].leaf_cert_public_key);
308 : } else {
309 0 : result = libspdm_get_leaf_cert_public_key_from_cert_chain(
310 : spdm_context->connection_info.algorithm.base_hash_algo,
311 0 : spdm_context->connection_info.algorithm.req_base_asym_alg,
312 : cert_chain_buffer, cert_chain_buffer_size,
313 0 : &spdm_context->connection_info.peer_used_cert_chain[slot_id].leaf_cert_public_key);
314 : }
315 0 : if (!result) {
316 0 : return LIBSPDM_STATUS_INVALID_CERT;
317 : }
318 : #endif
319 0 : if (status != LIBSPDM_STATUS_VERIF_NO_AUTHORITY) {
320 0 : return LIBSPDM_STATUS_SUCCESS;
321 : } else {
322 0 : return LIBSPDM_STATUS_VERIF_NO_AUTHORITY;
323 : }
324 : }
325 :
326 : #endif /* (LIBSPDM_ENABLE_CAPABILITY_MUT_AUTH_CAP) && (...) */
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