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