Add header file for arhitecture/implementation specific px4 crypto and

configuration for cmake

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

platforms/common/include/px4_platform_common/crypto_algorithms.h

@@ -0,0 +1,46 @@
+/****************************************************************************
+ *
+ *   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 <stdint.h>
+
+/* List of all the supported crypto algorithms in PX4 */
+
+typedef enum {
+	CRYPTO_NONE = 0,
+	CRYPTO_ED25519 = 1,
+	CRYPTO_XCHACHA20 = 2,
+	CRYPTO_AES = 3,
+	CRYPTO_RSA_OAEP = 4,
+} px4_crypto_algorithm_t;

platforms/common/include/px4_platform_common/crypto_backend.h

@@ -0,0 +1,115 @@
+/****************************************************************************
+ *
+ *   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
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <px4_platform_common/crypto_algorithms.h>
+#include "crypto_backend_definitions.h"
+
+/*
+ * Keystore access functions
+ */
+
+void keystore_init(void);
+
+/*
+ * Open a session for accessing security keys
+ */
+
+keystore_session_handle_t keystore_open(void);
+
+/*
+ * Close the keystore session
+ * handle: handle to the session to be closed
+ */
+
+void keystore_close(keystore_session_handle_t *handle);
+
+/*
+ * Get a key from keystore
+ * handle: a handle to an open keystore
+ * idx: key index in keystore
+ * key_buf: output buffer for the key
+ * key_buf_size: size of the provided output buffer
+ * returns the size of the key in keystore
+ */
+size_t keystore_get_key(keystore_session_handle_t handle, uint8_t idx, uint8_t *key_buf, size_t key_buf_size);
+
+/*
+ * Architecture specific PX4 Crypto API functions
+ */
+
+/*
+ * Initialize hw level crypto
+ * This has to be called before any other crypto operations
+ */
+
+void crypto_init(void);
+
+/*
+ * Open a session for performing crypto functions
+ * algorithm: The crypto algorithm to be used in this session
+ */
+
+crypto_session_handle_t crypto_open(px4_crypto_algorithm_t algorithm);
+
+/*
+ * Close the session for performing crypto operations
+ * handle: handle to the session to be closed
+ */
+
+void crypto_close(crypto_session_handle_t *handle);
+
+/*
+ * Perform signature check using an open session to crypto
+ * handle: session handle, returned by open
+ * key_index: index to the key used for signature check
+ * message: pointer to the data to be checked
+ * message_size: size of the data
+ */
+
+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);
+
+#if defined(__cplusplus)
+} // extern "C"
+#endif