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_requester_lib.h"
8 :
9 168 : uint16_t libspdm_allocate_req_session_id(libspdm_context_t *spdm_context, bool use_psk)
10 : {
11 : uint16_t req_session_id;
12 : libspdm_session_info_t *session_info;
13 : size_t index;
14 :
15 168 : if (use_psk) {
16 60 : if ((spdm_context->max_psk_session_count != 0) &&
17 16 : (spdm_context->current_psk_session_count >= spdm_context->max_psk_session_count)) {
18 5 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_ERROR,
19 : "libspdm_allocate_req_session_id - MAX PSK session\n"));
20 5 : return (INVALID_SESSION_ID & 0xFFFF);
21 : }
22 : } else {
23 108 : if ((spdm_context->max_dhe_session_count != 0) &&
24 16 : (spdm_context->current_dhe_session_count >= spdm_context->max_dhe_session_count)) {
25 5 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_ERROR,
26 : "libspdm_allocate_req_session_id - MAX DHE session\n"));
27 5 : return (INVALID_SESSION_ID & 0xFFFF);
28 : }
29 : }
30 :
31 158 : session_info = spdm_context->session_info;
32 350 : for (index = 0; index < LIBSPDM_MAX_SESSION_COUNT; index++) {
33 350 : if ((session_info[index].session_id & 0xFFFF) == (INVALID_SESSION_ID & 0xFFFF)) {
34 158 : req_session_id = (uint16_t)(0xFFFF - index);
35 158 : return req_session_id;
36 : }
37 : }
38 :
39 0 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_ERROR, "libspdm_allocate_req_session_id - MAX session_id\n"));
40 0 : return (INVALID_SESSION_ID & 0xFFFF);
41 : }
42 :
43 172 : void libspdm_build_opaque_data_supported_version_data(libspdm_context_t *spdm_context,
44 : size_t *data_out_size,
45 : void *data_out)
46 : {
47 : size_t final_data_size;
48 : secured_message_general_opaque_data_table_header_t *general_opaque_data_table_header;
49 : spdm_general_opaque_data_table_header_t *spdm_general_opaque_data_table_header;
50 : secured_message_opaque_element_table_header_t *opaque_element_table_header;
51 : secured_message_opaque_element_supported_version_t *opaque_element_support_version;
52 : spdm_version_number_t *versions_list;
53 : void *end;
54 :
55 172 : if (spdm_context->local_context.secured_message_version.spdm_version_count == 0) {
56 0 : *data_out_size = 0;
57 0 : return;
58 : }
59 :
60 172 : final_data_size = libspdm_get_opaque_data_supported_version_data_size(spdm_context);
61 172 : LIBSPDM_ASSERT(*data_out_size >= final_data_size);
62 :
63 172 : if (libspdm_get_connection_version (spdm_context) >= SPDM_MESSAGE_VERSION_12) {
64 12 : spdm_general_opaque_data_table_header = data_out;
65 12 : spdm_general_opaque_data_table_header->total_elements = 1;
66 12 : libspdm_write_uint24(spdm_general_opaque_data_table_header->reserved, 0);
67 12 : opaque_element_table_header = (void *)(spdm_general_opaque_data_table_header + 1);
68 : } else {
69 160 : general_opaque_data_table_header = data_out;
70 160 : general_opaque_data_table_header->spec_id = SECURED_MESSAGE_OPAQUE_DATA_SPEC_ID;
71 160 : general_opaque_data_table_header->opaque_version = SECURED_MESSAGE_OPAQUE_VERSION;
72 160 : general_opaque_data_table_header->total_elements = 1;
73 160 : general_opaque_data_table_header->reserved = 0;
74 160 : opaque_element_table_header = (void *)(general_opaque_data_table_header + 1);
75 : }
76 :
77 172 : opaque_element_table_header->id = SPDM_REGISTRY_ID_DMTF;
78 172 : opaque_element_table_header->vendor_len = 0;
79 172 : opaque_element_table_header->opaque_element_data_len =
80 172 : sizeof(secured_message_opaque_element_supported_version_t) +
81 172 : sizeof(spdm_version_number_t) *
82 172 : spdm_context->local_context.secured_message_version.spdm_version_count;
83 :
84 172 : opaque_element_support_version = (void *)(opaque_element_table_header + 1);
85 172 : opaque_element_support_version->sm_data_version =
86 : SECURED_MESSAGE_OPAQUE_ELEMENT_SMDATA_DATA_VERSION;
87 172 : opaque_element_support_version->sm_data_id =
88 : SECURED_MESSAGE_OPAQUE_ELEMENT_SMDATA_ID_SUPPORTED_VERSION;
89 172 : opaque_element_support_version->version_count =
90 172 : spdm_context->local_context.secured_message_version.spdm_version_count;
91 :
92 172 : versions_list = (void *)(opaque_element_support_version + 1);
93 172 : libspdm_copy_mem(versions_list,
94 172 : *data_out_size - ((uint8_t*)versions_list - (uint8_t*)data_out),
95 172 : spdm_context->local_context.secured_message_version.spdm_version,
96 172 : spdm_context->local_context.secured_message_version.spdm_version_count *
97 : sizeof(spdm_version_number_t));
98 :
99 : /* Zero Padding. *data_out_size does not need to be changed, because data is 0 padded */
100 172 : end = versions_list + spdm_context->local_context.secured_message_version.spdm_version_count;
101 172 : libspdm_zero_mem(end, (size_t)data_out + final_data_size - (size_t)end);
102 : }
103 :
104 : /**
105 : * Process opaque data version selection.
106 : *
107 : * This function should be called in KEY_EXCHANGE/PSK_EXCHANGE response parsing in requester.
108 : *
109 : * @param data_in_size size in bytes of the data_in.
110 : * @param data_in A pointer to the buffer to store the opaque data version selection.
111 : **/
112 41 : libspdm_return_t libspdm_process_opaque_data_version_selection_data(
113 : libspdm_context_t *spdm_context, size_t data_in_size, void *data_in,
114 : spdm_version_number_t *secured_message_version)
115 : {
116 : const secured_message_opaque_element_table_header_t *opaque_element_table_header;
117 : const secured_message_opaque_element_version_selection_t *opaque_element_version_section;
118 :
119 : bool result;
120 : uint8_t secured_message_version_index;
121 : const void *get_element_ptr;
122 : size_t get_element_len;
123 :
124 41 : result = false;
125 41 : get_element_ptr = NULL;
126 :
127 41 : if (spdm_context->local_context.secured_message_version.spdm_version_count == 0) {
128 0 : return LIBSPDM_STATUS_SUCCESS;
129 : }
130 :
131 41 : result = libspdm_get_element_from_opaque_data(
132 : spdm_context, data_in_size,
133 : data_in, SPDM_REGISTRY_ID_DMTF,
134 : SECURED_MESSAGE_OPAQUE_ELEMENT_SMDATA_ID_VERSION_SELECTION,
135 : &get_element_ptr, &get_element_len);
136 41 : if ((!result) || (get_element_ptr == NULL)) {
137 3 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO,"get element error!\n"));
138 3 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
139 : }
140 :
141 38 : opaque_element_table_header = (const secured_message_opaque_element_table_header_t*)
142 : get_element_ptr;
143 :
144 : /* Check for selection version data. */
145 38 : if ((opaque_element_table_header->vendor_len != 0) ||
146 38 : (opaque_element_table_header->opaque_element_data_len !=
147 : sizeof(secured_message_opaque_element_version_selection_t))) {
148 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
149 : }
150 38 : opaque_element_version_section = (const void *)(opaque_element_table_header + 1);
151 :
152 38 : if ((const uint8_t *)opaque_element_version_section +
153 : sizeof(secured_message_opaque_element_version_selection_t) >
154 38 : (const uint8_t *)opaque_element_table_header + get_element_len) {
155 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
156 : }
157 :
158 38 : for (secured_message_version_index = 0;
159 38 : secured_message_version_index <
160 38 : spdm_context->local_context.secured_message_version.spdm_version_count;
161 0 : secured_message_version_index++) {
162 76 : if (libspdm_get_version_from_version_number(opaque_element_version_section->
163 : selected_version)
164 : ==
165 38 : libspdm_get_version_from_version_number(
166 38 : spdm_context->local_context.secured_message_version.spdm_version[
167 : secured_message_version_index])) {
168 38 : libspdm_copy_mem(secured_message_version,
169 : sizeof(spdm_version_number_t),
170 38 : &(opaque_element_version_section->selected_version),
171 : sizeof(spdm_version_number_t));
172 38 : return LIBSPDM_STATUS_SUCCESS;
173 : }
174 : }
175 :
176 0 : return LIBSPDM_STATUS_UNSUPPORTED_CAP;
177 : }
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