1 /*
2 * PSA crypto client code
3 */
4 /*
5 * Copyright The Mbed TLS Contributors
6 * SPDX-License-Identifier: Apache-2.0
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License"); you may
9 * not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
16 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 #include "common.h"
22 #include "psa/crypto.h"
23
24 #if defined(MBEDTLS_PSA_CRYPTO_CLIENT)
25
26 #include <string.h>
27 #include "mbedtls/platform.h"
28
psa_reset_key_attributes(psa_key_attributes_t * attributes)29 void psa_reset_key_attributes(psa_key_attributes_t *attributes)
30 {
31 mbedtls_free(attributes->domain_parameters);
32 memset(attributes, 0, sizeof(*attributes));
33 }
34
psa_set_key_domain_parameters(psa_key_attributes_t * attributes,psa_key_type_t type,const uint8_t * data,size_t data_length)35 psa_status_t psa_set_key_domain_parameters(psa_key_attributes_t *attributes,
36 psa_key_type_t type,
37 const uint8_t *data,
38 size_t data_length)
39 {
40 uint8_t *copy = NULL;
41
42 if (data_length != 0) {
43 copy = mbedtls_calloc(1, data_length);
44 if (copy == NULL) {
45 return PSA_ERROR_INSUFFICIENT_MEMORY;
46 }
47 memcpy(copy, data, data_length);
48 }
49 /* After this point, this function is guaranteed to succeed, so it
50 * can start modifying `*attributes`. */
51
52 if (attributes->domain_parameters != NULL) {
53 mbedtls_free(attributes->domain_parameters);
54 attributes->domain_parameters = NULL;
55 attributes->domain_parameters_size = 0;
56 }
57
58 attributes->domain_parameters = copy;
59 attributes->domain_parameters_size = data_length;
60 attributes->core.type = type;
61 return PSA_SUCCESS;
62 }
63
psa_get_key_domain_parameters(const psa_key_attributes_t * attributes,uint8_t * data,size_t data_size,size_t * data_length)64 psa_status_t psa_get_key_domain_parameters(
65 const psa_key_attributes_t *attributes,
66 uint8_t *data, size_t data_size, size_t *data_length)
67 {
68 if (attributes->domain_parameters_size > data_size) {
69 return PSA_ERROR_BUFFER_TOO_SMALL;
70 }
71 *data_length = attributes->domain_parameters_size;
72 if (attributes->domain_parameters_size != 0) {
73 memcpy(data, attributes->domain_parameters,
74 attributes->domain_parameters_size);
75 }
76 return PSA_SUCCESS;
77 }
78
79 #endif /* MBEDTLS_PSA_CRYPTO_CLIENT */
80