Line data Source code
1 : /**
2 : * Copyright Notice:
3 : * Copyright 2024-2025 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 : #include "internal/libspdm_responder_lib.h"
7 :
8 : #if LIBSPDM_ENABLE_CAPABILITY_MEL_CAP
9 :
10 5 : libspdm_return_t libspdm_get_response_measurement_extension_log(libspdm_context_t *spdm_context,
11 : size_t request_size,
12 : const void *request,
13 : size_t *response_size,
14 : void *response)
15 : {
16 : const spdm_get_measurement_extension_log_request_t *spdm_request;
17 : spdm_measurement_extension_log_response_t *spdm_response;
18 : uint32_t offset;
19 : uint32_t length;
20 : uint32_t max_mel_block_length;
21 : size_t remainder_length;
22 : size_t response_capacity;
23 : libspdm_session_info_t *session_info;
24 : libspdm_session_state_t session_state;
25 : spdm_measurement_extension_log_dmtf_t *spdm_mel;
26 : size_t spdm_mel_len;
27 :
28 5 : spdm_request = request;
29 :
30 : /* -=[Check Parameters Phase]=- */
31 5 : LIBSPDM_ASSERT(spdm_request->header.request_response_code ==
32 : SPDM_GET_MEASUREMENT_EXTENSION_LOG);
33 :
34 5 : if (libspdm_get_connection_version(spdm_context) < SPDM_MESSAGE_VERSION_13) {
35 0 : return libspdm_generate_error_response(spdm_context,
36 : SPDM_ERROR_CODE_UNSUPPORTED_REQUEST,
37 : SPDM_GET_MEASUREMENT_EXTENSION_LOG,
38 : response_size, response);
39 : }
40 :
41 5 : if (spdm_request->header.spdm_version != libspdm_get_connection_version(spdm_context)) {
42 0 : return libspdm_generate_error_response(spdm_context,
43 : SPDM_ERROR_CODE_VERSION_MISMATCH, 0,
44 : response_size, response);
45 : }
46 5 : if (spdm_context->response_state != LIBSPDM_RESPONSE_STATE_NORMAL) {
47 0 : return libspdm_responder_handle_response_state(
48 : spdm_context,
49 0 : spdm_request->header.request_response_code,
50 : response_size, response);
51 : }
52 5 : if (spdm_context->connection_info.connection_state < LIBSPDM_CONNECTION_STATE_NEGOTIATED) {
53 0 : return libspdm_generate_error_response(spdm_context,
54 : SPDM_ERROR_CODE_UNEXPECTED_REQUEST,
55 : 0, response_size, response);
56 : }
57 :
58 5 : session_info = NULL;
59 5 : if (spdm_context->last_spdm_request_session_id_valid) {
60 0 : session_info = libspdm_get_session_info_via_session_id(
61 : spdm_context,
62 : spdm_context->last_spdm_request_session_id);
63 0 : if (session_info == NULL) {
64 0 : return libspdm_generate_error_response(
65 : spdm_context,
66 : SPDM_ERROR_CODE_UNEXPECTED_REQUEST, 0,
67 : response_size, response);
68 : }
69 0 : session_state = libspdm_secured_message_get_session_state(
70 : session_info->secured_message_context);
71 0 : if (session_state != LIBSPDM_SESSION_STATE_ESTABLISHED) {
72 0 : return libspdm_generate_error_response(
73 : spdm_context,
74 : SPDM_ERROR_CODE_UNEXPECTED_REQUEST, 0,
75 : response_size, response);
76 : }
77 : }
78 5 : if (!libspdm_is_capabilities_flag_supported(
79 : spdm_context, false, 0,
80 : SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_MEL_CAP)) {
81 0 : return libspdm_generate_error_response(
82 : spdm_context, SPDM_ERROR_CODE_UNSUPPORTED_REQUEST,
83 : SPDM_GET_MEASUREMENT_EXTENSION_LOG, response_size, response);
84 : }
85 :
86 5 : if ((spdm_context->connection_info.algorithm.mel_spec == 0) ||
87 5 : (spdm_context->connection_info.algorithm.measurement_hash_algo == 0) ) {
88 0 : return libspdm_generate_error_response(
89 : spdm_context, SPDM_ERROR_CODE_UNEXPECTED_REQUEST,
90 : 0, response_size, response);
91 : }
92 :
93 5 : if (request_size < sizeof(spdm_get_measurement_extension_log_request_t)) {
94 0 : return libspdm_generate_error_response(spdm_context,
95 : SPDM_ERROR_CODE_INVALID_REQUEST, 0,
96 : response_size, response);
97 : }
98 :
99 5 : offset = spdm_request->offset;
100 5 : length = spdm_request->length;
101 :
102 5 : if (!libspdm_is_capabilities_flag_supported(spdm_context, false,
103 : SPDM_GET_CAPABILITIES_REQUEST_FLAGS_CHUNK_CAP,
104 : SPDM_GET_CAPABILITIES_RESPONSE_FLAGS_CHUNK_CAP)) {
105 5 : max_mel_block_length = LIBSPDM_MIN(SPDM_MAX_MEASUREMENT_EXTENSION_LOG_SIZE,
106 : spdm_context->local_context.capability.sender_data_transfer_size -
107 : sizeof(spdm_measurement_extension_log_response_t));
108 5 : if (length > max_mel_block_length) {
109 0 : length = max_mel_block_length;
110 : }
111 : }
112 :
113 5 : spdm_mel = NULL;
114 5 : spdm_mel_len = 0;
115 5 : if (!libspdm_measurement_extension_log_collection(
116 : spdm_context,
117 5 : spdm_context->connection_info.algorithm.mel_spec,
118 5 : spdm_context->connection_info.algorithm.measurement_spec,
119 : spdm_context->connection_info.algorithm.measurement_hash_algo,
120 : (void **)&spdm_mel, &spdm_mel_len)) {
121 0 : return libspdm_generate_error_response(spdm_context,
122 : SPDM_ERROR_CODE_OPERATION_FAILED, 0,
123 : response_size, response);
124 : }
125 :
126 5 : if (offset >= spdm_mel_len) {
127 1 : return libspdm_generate_error_response(spdm_context,
128 : SPDM_ERROR_CODE_INVALID_REQUEST, 0,
129 : response_size, response);
130 : }
131 :
132 4 : if ((uint64_t)(offset + length) > spdm_mel_len) {
133 3 : length = (uint32_t)(spdm_mel_len - offset);
134 : }
135 4 : remainder_length = spdm_mel_len - (length + offset);
136 :
137 4 : libspdm_reset_message_buffer_via_request_code(spdm_context, session_info,
138 4 : spdm_request->header.request_response_code);
139 :
140 4 : LIBSPDM_ASSERT(*response_size >= sizeof(spdm_measurement_extension_log_response_t) + length);
141 :
142 4 : response_capacity = *response_size;
143 4 : *response_size = sizeof(spdm_measurement_extension_log_response_t) + length;
144 4 : libspdm_zero_mem(response, *response_size);
145 4 : spdm_response = response;
146 :
147 4 : spdm_response->header.spdm_version = spdm_request->header.spdm_version;
148 4 : spdm_response->header.request_response_code = SPDM_MEASUREMENT_EXTENSION_LOG;
149 4 : spdm_response->header.param1 = 0;
150 4 : spdm_response->header.param2 = 0;
151 :
152 4 : spdm_response->portion_length = length;
153 4 : spdm_response->remainder_length = (uint32_t)remainder_length;
154 :
155 4 : libspdm_copy_mem(spdm_response + 1,
156 : response_capacity - sizeof(spdm_measurement_extension_log_response_t),
157 4 : (const uint8_t *)spdm_mel + offset, length);
158 :
159 4 : return LIBSPDM_STATUS_SUCCESS;
160 : }
161 :
162 : #endif /* LIBSPDM_ENABLE_CAPABILITY_MEL_CAP */
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