1 /*
2 * Copyright Nordic Semiconductor ASA
3 * SPDX-License-Identifier: Apache-2.0
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License"); you may
6 * not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
13 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 #include "cc310_glue.h"
19
cc310_init(void)20 int cc310_init(void)
21 {
22 /* Only initialize once */
23 static bool initialized;
24
25 if (!initialized) {
26 nrf_cc310_enable();
27 if (nrf_cc310_bl_init() != 0) {
28 return -1;
29 }
30 initialized = true;
31 nrf_cc310_disable();
32 }
33
34 return 0;
35 }
36
cc310_sha256_update(nrf_cc310_bl_hash_context_sha256_t * ctx,const void * data,uint32_t data_len)37 void cc310_sha256_update(nrf_cc310_bl_hash_context_sha256_t *ctx,
38 const void *data,
39 uint32_t data_len)
40 {
41 /*
42 * NRF Cryptocell can only read from RAM this allocates a buffer on the stack
43 * if the data provided is not located in RAM.
44 */
45
46 if ((uint32_t) data < CONFIG_SRAM_BASE_ADDRESS) {
47 uint8_t stack_buffer[data_len];
48 uint32_t block_len = data_len;
49 memcpy(stack_buffer, data, block_len);
50 nrf_cc310_bl_hash_sha256_update(ctx, stack_buffer, block_len);
51 } else {
52 nrf_cc310_bl_hash_sha256_update(ctx, data, data_len);
53 }
54 };
55
cc310_ecdsa_verify_secp256r1(uint8_t * hash,uint8_t * public_key,uint8_t * signature,size_t hash_len)56 int cc310_ecdsa_verify_secp256r1(uint8_t *hash,
57 uint8_t *public_key,
58 uint8_t *signature,
59 size_t hash_len)
60 {
61 int rc;
62 nrf_cc310_bl_ecdsa_verify_context_secp256r1_t ctx;
63 cc310_init();
64 nrf_cc310_enable();
65 rc = nrf_cc310_bl_ecdsa_verify_secp256r1(&ctx,
66 (nrf_cc310_bl_ecc_public_key_secp256r1_t *) public_key,
67 (nrf_cc310_bl_ecc_signature_secp256r1_t *) signature,
68 hash,
69 hash_len);
70 nrf_cc310_disable();
71 return rc;
72 }
73
74
