1 // Copyright 2019 Espressif Systems (Shanghai) PTE LTD
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //         http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef NVS_ENCRYPTED_PARTITION_HPP_
16 #define NVS_ENCRYPTED_PARTITION_HPP_
17 
18 #include "mbedtls/aes.h"
19 #include "nvs_flash.h"
20 #include "nvs_partition.hpp"
21 
22 namespace nvs {
23 
24 class NVSEncryptedPartition : public NVSPartition {
25 public:
26     NVSEncryptedPartition(const esp_partition_t *partition);
27 
~NVSEncryptedPartition()28     virtual ~NVSEncryptedPartition() { }
29 
30     esp_err_t init(nvs_sec_cfg_t* cfg);
31 
32     esp_err_t read(size_t src_offset, void* dst, size_t size) override;
33 
34     esp_err_t write(size_t dst_offset, const void* src, size_t size) override;
35 
36 protected:
37     mbedtls_aes_xts_context mEctxt;
38     mbedtls_aes_xts_context mDctxt;
39 };
40 
41 } // nvs
42 
43 #endif // NVS_ENCRYPTED_PARTITION_HPP_
44