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Add simple SW implementations for crypto_backend and keystore_backend

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Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
This commit is contained in:
Jukka Laitinen
2021-05-28 15:35:24 +03:00
committed by Beat Küng
parent d068ae48d6
commit 0d4f481035
9 changed files with 624 additions and 0 deletions
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44
platforms/common/px4_sw_crypto/CMakeLists.txt Normal file
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############################################################################
#
# Copyright (c) 2021 Technology Innoavation Institute. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name PX4 nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
if (DEFINED PX4_CRYPTO)
if (IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${PX4_CRYPTO})
add_subdirectory(${PX4_CRYPTO})
endif()
endif()
if (DEFINED PX4_KEYSTORE)
if (IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${PX4_KEYSTORE})
add_subdirectory(${PX4_KEYSTORE})
endif()
endif()

69
platforms/common/px4_sw_crypto/stub_keystore/CMakeLists.txt Normal file
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############################################################################
#
# Copyright (c) 2021 Technology Innoavation Institute. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name PX4 nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
px4_add_library(keystore_backend stub_keystore.c)
target_include_directories(keystore_backend PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
if(DEFINED ENV{PUBLIC_KEY0})
add_definitions(-DPUBLIC_KEY0=$ENV{PUBLIC_KEY0})
endif()
if(DEFINED ENV{PUBLIC_KEY1})
add_definitions(-DPUBLIC_KEY1=$ENV{PUBLIC_KEY1})
endif()
if(DEFINED ENV{PUBLIC_KEY2})
add_definitions(-DPUBLIC_KEY2=$ENV{PUBLIC_KEY2})
endif()
if(DEFINED ENV{PUBLIC_KEY3})
add_definitions(-DPUBLIC_KEY3=$ENV{PUBLIC_KEY3})
endif()
if(DEFINED ENV{PUBLIC_KEY4})
add_definitions(-DPUBLIC_KEY4=$ENV{PUBLIC_KEY4})
endif()
if(DEFINED ENV{PUBLIC_KEY5})
add_definitions(-DPUBLIC_KEY5=$ENV{PUBLIC_KEY5})
endif()
if(DEFINED ENV{PUBLIC_KEY6})
add_definitions(-DPUBLIC_KEY6=$ENV{PUBLIC_KEY6})
endif()
if(DEFINED ENV{PUBLIC_KEY7})
add_definitions(-DPUBLIC_KEY7=$ENV{PUBLIC_KEY7})
endif()

42
platforms/common/px4_sw_crypto/stub_keystore/keystore_backend_definitions.h Normal file
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/****************************************************************************
*
* Copyright (c) 2021 Technology Innovation Institute. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#pragma once
typedef struct {
int handle;
} keystore_session_handle_t;
/* For the stub_keystore the handle is not used at the moment, so it is always valid */
inline bool keystore_session_handle_valid(keystore_session_handle_t handle) {return handle.handle > 0;}

113
platforms/common/px4_sw_crypto/stub_keystore/public_key.h Normal file
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/****************************************************************************
*
* Copyright (c) 2020 Technology Innovation Institute. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file public_key.h
*
* File holds public keys for signed firmware.
*
*
*/
#pragma once
#define XSTR(x) #x
#define STR(x) XSTR(x)
#ifndef PUBLIC_KEY0
#error "At least one key (PUBLIC_KEY0) must be defined"
#endif
typedef struct {
const size_t key_size;
const uint8_t *key;
} persistent_key_t;
/* This constant only exists to calculate size of the
key. It will be removed by the linker */
static const uint8_t public_key0[] = {
#include STR(PUBLIC_KEY0)
};
#ifdef PUBLIC_KEY1
static const uint8_t public_key1[] = {
#include STR(PUBLIC_KEY1)
};
#endif
#ifdef PUBLIC_KEY2
static const uint8_t public_key2[] = {
#include STR(PUBLIC_KEY2)
};
#endif
#ifdef PUBLIC_KEY3
static const uint8_t public_key3[] = {
#include STR(PUBLIC_KEY3)
};
#endif
static const persistent_key_t public_keys[] = {
{
.key = public_key0,
.key_size = sizeof(public_key0)
}
#ifdef PUBLIC_KEY1
,
{
.key = public_key1,
.key_size = sizeof(public_key1)
}
#endif
#ifdef PUBLIC_KEY2
,
{
.key = public_key2,
.key_size = sizeof(public_key2)
}
#endif
#ifdef PUBLIC_KEY3
{
.key = public_key3,
.key_size = sizeof(public_key3)
}
#endif
};
#define NPERSISTENT_KEYS (sizeof(public_keys) / sizeof(persistent_key_t))

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platforms/common/px4_sw_crypto/stub_keystore/stub_keystore.c Normal file
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/****************************************************************************
*
* Copyright (c) 2021 Technology Innovation Institute. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#include <px4_platform_common/crypto_algorithms.h>
#include <string.h>
#include <stdbool.h>
#include "public_key.h"
#include "keystore_backend_definitions.h"
/*
* For now, this is just a dummy up/down counter for tracking open/close calls
*/
static int keystore_open_count = 0;
void keystore_init(void)
{
}
keystore_session_handle_t keystore_open(void)
{
keystore_session_handle_t ret;
ret.handle = ++keystore_open_count;
return ret;
}
void keystore_close(keystore_session_handle_t *handle)
{
keystore_open_count--;
handle->handle = 0;
}
size_t keystore_get_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key_buf, size_t key_buf_size)
{
size_t ret = 0;
if (idx < NPERSISTENT_KEYS) {
ret = public_keys[idx].key_size;
if (key_buf) {
if (key_buf_size >= ret) {
memcpy(key_buf, public_keys[idx].key, ret);
} else {
ret = 0;
}
}
}
return ret;
}

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platforms/common/px4_sw_crypto/sw_crypto/CMakeLists.txt Normal file
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############################################################################
#
# Copyright (c) 2021 Technology Innoavation Institute. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name PX4 nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
px4_add_library(crypto_backend crypto.c)
target_link_libraries(crypto_backend
PUBLIC
keystore_backend
)
target_link_libraries(crypto_backend
PRIVATE
monocypher
)
target_include_directories(crypto_backend PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

182
platforms/common/px4_sw_crypto/sw_crypto/crypto.c Normal file
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/****************************************************************************
*
* Copyright (c) 2020 Technology Innovation Institute. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file crypto.c
*
* Wrapper for the monocypher crypto
*
*/
#include <inttypes.h>
#include <stdbool.h>
#include <px4_platform_common/crypto_backend.h>
#include <lib/crypto/monocypher/src/optional/monocypher-ed25519.h>
/* room for 16 keys */
#define KEY_CACHE_LEN 16
#ifndef SECMEM_ALLOC
#define SECMEM_ALLOC malloc
#endif
#ifndef SECMEM_FREE
#define SECMEM_FREE free
#endif
/*
* For now, this is just a dummy up/down counter for tracking open/close calls
*/
static int crypto_open_count = 0;
typedef struct {
size_t key_size;
uint8_t *key;
} volatile_key_t;
static volatile_key_t key_cache[KEY_CACHE_LEN];
/* Clear key cache */
static void clear_key_cache(void)
{
for (int i = 0; i < KEY_CACHE_LEN ; i++) {
SECMEM_FREE(key_cache[i].key);
key_cache[i].key = NULL;
key_cache[i].key_size = 0;
}
}
/* Retrieve a direct pointer to the cached temporary/public key */
static const uint8_t *crypto_get_key_ptr(keystore_session_handle_t handle, uint8_t key_idx,
size_t *len)
{
uint8_t *ret;
if (key_idx >= KEY_CACHE_LEN) {
*len = 0;
return NULL;
}
ret = key_cache[key_idx].key;
/* if the key doesn't exist in the key cache, try to read it in there from keystore */
if (ret == NULL) {
/* First check if the key exists in the keystore and retrieve its length */
*len = keystore_get_key(handle, key_idx, NULL, 0);
if (*len > 0) {
/* Allocate memory for the key in the cache */
ret = SECMEM_ALLOC(*len);
/* Retrieve the key from the keystore */
if (ret) {
if (keystore_get_key(handle, key_idx, ret, *len) > 0) {
/* Success, store the key in cache */
key_cache[key_idx].key_size = *len;
key_cache[key_idx].key = ret;
} else {
/* key retrieval failed, free the memory */
SECMEM_FREE(ret);
}
}
}
}
*len = key_cache[key_idx].key_size;
return ret;
}
void crypto_init()
{
keystore_init();
clear_key_cache();
}
crypto_session_handle_t crypto_open(px4_crypto_algorithm_t algorithm)
{
crypto_session_handle_t ret;
ret.algorithm = algorithm;
ret.keystore_handle = keystore_open();
if (keystore_session_handle_valid(ret.keystore_handle)) {
ret.handle = ++crypto_open_count;
} else {
ret.handle = 0;
}
return ret;
}
void crypto_close(crypto_session_handle_t *handle)
{
crypto_open_count--;
handle->handle = 0;
keystore_close(&handle->keystore_handle);
}
bool crypto_signature_check(crypto_session_handle_t handle,
uint8_t key_index,
const uint8_t *signature,
const uint8_t *message,
size_t message_size)
{
bool ret = false;
size_t keylen = 0;
const uint8_t *public_key;
if (crypto_session_handle_valid(handle)) {
public_key = crypto_get_key_ptr(handle.keystore_handle, key_index, &keylen);
}
if (keylen == 0) {
return false;
}
switch (handle.algorithm) {
case CRYPTO_ED25519:
ret = crypto_ed25519_check(signature, public_key, message, message_size) == 0;
break;
default:
ret = false;
}
return ret;
}

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platforms/common/px4_sw_crypto/sw_crypto/crypto_backend_definitions.h Normal file
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/****************************************************************************
*
* Copyright (c) 2021 Technology Innovation Institute. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#pragma once
#include <stdbool.h>
#include <keystore_backend_definitions.h>
typedef struct {
int handle;
px4_crypto_algorithm_t algorithm;
uint8_t *nonce;
keystore_session_handle_t keystore_handle;
} crypto_session_handle_t;
static inline bool crypto_session_handle_valid(crypto_session_handle_t handle) {return handle.handle > 0;}