1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without
7 * restriction, including without limitation the rights to use, copy,
8 * modify, merge, publish, distribute, sublicense, and/or sell copies
9 * of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
19 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
20 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24
25 #include <trusty/keymaster_serializable.h>
26
append_to_buf(uint8_t * buf,const void * data,size_t data_len)27 uint8_t* append_to_buf(uint8_t* buf, const void* data, size_t data_len) {
28 if (data && data_len) {
29 trusty_memcpy(buf, data, data_len);
30 }
31 return buf + data_len;
32 }
33
append_uint32_to_buf(uint8_t * buf,uint32_t val)34 uint8_t* append_uint32_to_buf(uint8_t* buf, uint32_t val) {
35 return append_to_buf(buf, &val, sizeof(val));
36 }
37
append_sized_buf_to_buf(uint8_t * buf,const uint8_t * data,uint32_t data_len)38 uint8_t* append_sized_buf_to_buf(uint8_t* buf,
39 const uint8_t* data,
40 uint32_t data_len) {
41 buf = append_uint32_to_buf(buf, data_len);
42 return append_to_buf(buf, data, data_len);
43 }
44
km_boot_params_serialize(const struct km_boot_params * params,uint8_t ** out,uint32_t * out_size)45 int km_boot_params_serialize(const struct km_boot_params* params,
46 uint8_t** out,
47 uint32_t* out_size) {
48 uint8_t* tmp;
49
50 if (!out || !params || !out_size) {
51 return TRUSTY_ERR_INVALID_ARGS;
52 }
53 *out_size = (sizeof(params->os_version) + sizeof(params->os_patchlevel) +
54 sizeof(params->device_locked) +
55 sizeof(params->verified_boot_state) +
56 sizeof(params->verified_boot_key_hash_size) +
57 sizeof(params->verified_boot_hash_size) +
58 params->verified_boot_key_hash_size +
59 params->verified_boot_hash_size);
60 *out = trusty_calloc(*out_size, 1);
61 if (!*out) {
62 return TRUSTY_ERR_NO_MEMORY;
63 }
64
65 tmp = append_uint32_to_buf(*out, params->os_version);
66 tmp = append_uint32_to_buf(tmp, params->os_patchlevel);
67 tmp = append_uint32_to_buf(tmp, params->device_locked);
68 tmp = append_uint32_to_buf(tmp, params->verified_boot_state);
69 tmp = append_sized_buf_to_buf(tmp, params->verified_boot_key_hash,
70 params->verified_boot_key_hash_size);
71 tmp = append_sized_buf_to_buf(tmp, params->verified_boot_hash,
72 params->verified_boot_hash_size);
73
74 return TRUSTY_ERR_NONE;
75 }
76
km_attestation_data_serialize(const struct km_attestation_data * data,uint8_t ** out,uint32_t * out_size)77 int km_attestation_data_serialize(const struct km_attestation_data* data,
78 uint8_t** out,
79 uint32_t* out_size) {
80 uint8_t* tmp;
81
82 if (!out || !data || !out_size) {
83 return TRUSTY_ERR_INVALID_ARGS;
84 }
85 *out_size = (sizeof(data->algorithm) + sizeof(data->data_size) +
86 data->data_size);
87 *out = trusty_calloc(*out_size, 1);
88 if (!*out) {
89 return TRUSTY_ERR_NO_MEMORY;
90 }
91
92 tmp = append_uint32_to_buf(*out, data->algorithm);
93 tmp = append_sized_buf_to_buf(tmp, data->data, data->data_size);
94
95 return TRUSTY_ERR_NONE;
96 }
97
km_raw_buffer_serialize(const struct km_raw_buffer * buf,uint8_t ** out,uint32_t * out_size)98 int km_raw_buffer_serialize(const struct km_raw_buffer* buf,
99 uint8_t** out,
100 uint32_t* out_size) {
101 if (!out || !buf || !out_size) {
102 return TRUSTY_ERR_INVALID_ARGS;
103 }
104 *out_size = sizeof(buf->data_size) + buf->data_size;
105 *out = trusty_calloc(*out_size, 1);
106 if (!*out) {
107 return TRUSTY_ERR_NO_MEMORY;
108 }
109 append_sized_buf_to_buf(*out, buf->data, buf->data_size);
110
111 return TRUSTY_ERR_NONE;
112 }
113