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 :
9 119 : uint16_t libspdm_allocate_rsp_session_id(const libspdm_context_t *spdm_context, bool use_psk)
10 : {
11 : uint16_t rsp_session_id;
12 : const libspdm_session_info_t *session_info;
13 : size_t index;
14 :
15 119 : if (use_psk) {
16 47 : 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 & 0xFFFF0000) >> 16;
21 : }
22 : } else {
23 72 : 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 & 0xFFFF0000) >> 16;
28 : }
29 : }
30 :
31 109 : session_info = spdm_context->session_info;
32 159 : for (index = 0; index < LIBSPDM_MAX_SESSION_COUNT; index++) {
33 159 : if ((session_info[index].session_id & 0xFFFF0000) == (INVALID_SESSION_ID & 0xFFFF0000)) {
34 109 : rsp_session_id = (uint16_t)(0xFFFF - index);
35 109 : return rsp_session_id;
36 : }
37 : }
38 :
39 0 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_ERROR, "libspdm_allocate_rsp_session_id - MAX session_id\n"));
40 0 : return (INVALID_SESSION_ID & 0xFFFF0000) >> 16;
41 : }
42 :
43 83 : void libspdm_build_opaque_data_version_selection_data(const libspdm_context_t *spdm_context,
44 : spdm_version_number_t secured_message_version,
45 : size_t *data_out_size,
46 : void *data_out)
47 : {
48 : size_t final_data_size;
49 : secured_message_general_opaque_data_table_header_t *general_opaque_data_table_header;
50 : spdm_general_opaque_data_table_header_t *spdm_general_opaque_data_table_header;
51 : secured_message_opaque_element_table_header_t *opaque_element_table_header;
52 : secured_message_opaque_element_version_selection_t *opaque_element_version_section;
53 : void *end;
54 :
55 83 : if (spdm_context->local_context.secured_message_version.spdm_version_count == 0) {
56 0 : *data_out_size = 0;
57 0 : return;
58 : }
59 :
60 83 : final_data_size = libspdm_get_opaque_data_version_selection_data_size(spdm_context);
61 83 : LIBSPDM_ASSERT(*data_out_size >= final_data_size);
62 :
63 83 : if (libspdm_get_connection_version (spdm_context) >= SPDM_MESSAGE_VERSION_12) {
64 10 : spdm_general_opaque_data_table_header = data_out;
65 10 : spdm_general_opaque_data_table_header->total_elements = 1;
66 10 : libspdm_write_uint24(spdm_general_opaque_data_table_header->reserved, 0);
67 :
68 10 : opaque_element_table_header = (void *)(spdm_general_opaque_data_table_header + 1);
69 : } else {
70 73 : general_opaque_data_table_header = data_out;
71 73 : general_opaque_data_table_header->spec_id = SECURED_MESSAGE_OPAQUE_DATA_SPEC_ID;
72 73 : general_opaque_data_table_header->opaque_version = SECURED_MESSAGE_OPAQUE_VERSION;
73 73 : general_opaque_data_table_header->total_elements = 1;
74 73 : general_opaque_data_table_header->reserved = 0;
75 :
76 73 : opaque_element_table_header = (void *)(general_opaque_data_table_header + 1);
77 : }
78 83 : opaque_element_table_header->id = SPDM_REGISTRY_ID_DMTF;
79 83 : opaque_element_table_header->vendor_len = 0;
80 83 : opaque_element_table_header->opaque_element_data_len =
81 : sizeof(secured_message_opaque_element_version_selection_t);
82 :
83 83 : opaque_element_version_section = (void *)(opaque_element_table_header + 1);
84 83 : opaque_element_version_section->sm_data_version =
85 : SECURED_MESSAGE_OPAQUE_ELEMENT_SMDATA_DATA_VERSION;
86 83 : opaque_element_version_section->sm_data_id =
87 : SECURED_MESSAGE_OPAQUE_ELEMENT_SMDATA_ID_VERSION_SELECTION;
88 83 : opaque_element_version_section->selected_version = secured_message_version;
89 :
90 : /* Zero Padding*/
91 83 : end = opaque_element_version_section + 1;
92 83 : libspdm_zero_mem(end, (size_t)data_out + final_data_size - (size_t)end);
93 : }
94 :
95 26 : libspdm_return_t libspdm_process_opaque_data_supported_version_data(
96 : libspdm_context_t *spdm_context, size_t data_in_size, const void *data_in,
97 : spdm_version_number_t *secured_message_version)
98 : {
99 : const secured_message_opaque_element_table_header_t *opaque_element_table_header;
100 : const secured_message_opaque_element_supported_version_t *opaque_element_support_version;
101 : const spdm_version_number_t *versions_list;
102 : spdm_version_number_t common_version;
103 : uint8_t version_count;
104 :
105 : bool result;
106 : const void *get_element_ptr;
107 : size_t get_element_len;
108 :
109 26 : result = false;
110 26 : get_element_ptr = NULL;
111 :
112 26 : if (spdm_context->local_context.secured_message_version.spdm_version_count == 0) {
113 0 : return LIBSPDM_STATUS_SUCCESS;
114 : }
115 :
116 26 : if (data_in_size <
117 26 : libspdm_get_untrusted_opaque_data_supported_version_data_size(spdm_context, 1)) {
118 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
119 : }
120 :
121 26 : result = libspdm_get_element_from_opaque_data(
122 : spdm_context, data_in_size,
123 : data_in, SPDM_REGISTRY_ID_DMTF,
124 : SECURED_MESSAGE_OPAQUE_ELEMENT_SMDATA_ID_SUPPORTED_VERSION,
125 : &get_element_ptr, &get_element_len);
126 26 : if ((!result) || (get_element_ptr == NULL)) {
127 2 : LIBSPDM_DEBUG((LIBSPDM_DEBUG_INFO,"get element error!\n"));
128 2 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
129 : }
130 :
131 24 : opaque_element_table_header = (const secured_message_opaque_element_table_header_t*)
132 : get_element_ptr;
133 :
134 : /*check for supported version data*/
135 24 : opaque_element_support_version = (const void *)(opaque_element_table_header + 1);
136 :
137 24 : if ((const uint8_t *)opaque_element_support_version +
138 : sizeof(secured_message_opaque_element_supported_version_t) >
139 24 : (const uint8_t *)opaque_element_table_header + get_element_len) {
140 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
141 : }
142 :
143 24 : if (opaque_element_support_version->version_count == 0) {
144 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
145 : }
146 :
147 24 : version_count = opaque_element_support_version->version_count;
148 :
149 24 : if ((opaque_element_table_header->vendor_len != 0) ||
150 24 : (opaque_element_table_header->opaque_element_data_len !=
151 24 : (sizeof(secured_message_opaque_element_supported_version_t) +
152 24 : sizeof(spdm_version_number_t) * version_count))) {
153 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
154 : }
155 :
156 24 : versions_list = (const void *)(opaque_element_support_version + 1);
157 :
158 24 : if ((const uint8_t *)versions_list + sizeof(spdm_version_number_t) >
159 24 : (const uint8_t *)opaque_element_table_header + get_element_len) {
160 0 : return LIBSPDM_STATUS_INVALID_MSG_FIELD;
161 : }
162 :
163 24 : result = libspdm_negotiate_connection_version(
164 : &common_version,
165 24 : spdm_context->local_context.secured_message_version.spdm_version,
166 24 : spdm_context->local_context.secured_message_version.spdm_version_count,
167 : versions_list, version_count);
168 24 : if (!result) {
169 0 : return LIBSPDM_STATUS_UNSUPPORTED_CAP;
170 : }
171 :
172 24 : libspdm_copy_mem(secured_message_version, sizeof(spdm_version_number_t),
173 : &(common_version), sizeof(spdm_version_number_t));
174 :
175 24 : return LIBSPDM_STATUS_SUCCESS;
176 : }
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