mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-23 21:13:16 +00:00
acc39a4bc0
* Api Symbols: replace asserts with checks * Api Symbols: replace asserts with checks part 2 * Update no args function signatures with void, to help compiler to track incorrect usage * More unavoidable void * Update PVS config and code to make it happy * Format sources * nfc: fix checks * dead code cleanup & include fixes Co-authored-by: gornekich <n.gorbadey@gmail.com> Co-authored-by: hedger <hedger@users.noreply.github.com> Co-authored-by: hedger <hedger@nanode.su>
295 lines
10 KiB
C
295 lines
10 KiB
C
/**
|
|
* @file furi_hal_crypto.h
|
|
*
|
|
* Cryptography HAL API
|
|
*
|
|
* !!! READ THIS FIRST !!!
|
|
*
|
|
* Flipper was never designed to be secure, nor it passed cryptography audit.
|
|
* Despite of the fact that keys are stored in secure enclave there are some
|
|
* types of attack that can be performed against AES engine to recover
|
|
* keys(theoretical). Also there is no way to securely deliver user keys to
|
|
* device and never will be. In addition device is fully open and there is no
|
|
* way to guarantee safety of your data, it can be easily dumped with debugger
|
|
* or modified code.
|
|
*
|
|
* Secure enclave on WB series is implemented on core2 FUS side and can be used
|
|
* only if core2 alive. Enclave is responsible for storing, loading and
|
|
* unloading keys to and from enclave/AES in secure manner(AES engine key
|
|
* registers will be locked when key from enclave loaded)
|
|
*
|
|
* There are 11 keys that we provision at factory:
|
|
* - 0 - Master key for secure key delivery. Impossible to use for anything but
|
|
* key provisioning. We don't plan to use it too.
|
|
* - 1 - 10 - Keys used by firmware. All devices got the same set of keys. You
|
|
* also can use them in your applications.
|
|
*
|
|
* Also there is a slot 11 that we use for device unique key. This slot is
|
|
* intentionally left blank till the moment of first use, so you can ensure that
|
|
* we don't know your unique key. Also you can provision this key by your self
|
|
* with crypto cli or API.
|
|
*
|
|
* Other slots can be used for your needs. But since enclave is sequential
|
|
* append only, we can not guarantee you that slots you want are free. NEVER USE
|
|
* THEM FOR PUBLIC APPLICATIONS.
|
|
*
|
|
* Also you can directly load raw keys into AES engine and use it for your
|
|
* needs.
|
|
*/
|
|
#pragma once
|
|
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/** Factory provisioned master key slot. Should never be used. */
|
|
#define FURI_HAL_CRYPTO_ENCLAVE_MASTER_KEY_SLOT (0u)
|
|
|
|
/** Factory provisioned keys slot range. All of them are exactly same on all flippers. */
|
|
#define FURI_HAL_CRYPTO_ENCLAVE_FACTORY_KEY_SLOT_START (1u)
|
|
#define FURI_HAL_CRYPTO_ENCLAVE_FACTORY_KEY_SLOT_END (10u)
|
|
|
|
/** Device unique key slot. This key generated on first use or provisioned by user. Use furi_hal_crypto_enclave_ensure_key before using this slot. */
|
|
#define FURI_HAL_CRYPTO_ENCLAVE_UNIQUE_KEY_SLOT (11u)
|
|
|
|
/** User key slot range. This slots can be used for your needs, but never use them in public apps. */
|
|
#define FURI_HAL_CRYPTO_ENCLAVE_USER_KEY_SLOT_START (12u)
|
|
#define FURI_HAL_CRYPTO_ENCLAVE_USER_KEY_SLOT_END (100u)
|
|
|
|
/** [Deprecated] Indicates availability of advanced crypto functions, will be dropped before v1.0 */
|
|
#define FURI_HAL_CRYPTO_ADVANCED_AVAIL 1
|
|
|
|
/** FuriHalCryptoKey Type */
|
|
typedef enum {
|
|
FuriHalCryptoKeyTypeMaster, /**< Master key */
|
|
FuriHalCryptoKeyTypeSimple, /**< Simple unencrypted key */
|
|
FuriHalCryptoKeyTypeEncrypted, /**< Encrypted with Master key */
|
|
} FuriHalCryptoKeyType;
|
|
|
|
/** FuriHalCryptoKey Size in bits */
|
|
typedef enum {
|
|
FuriHalCryptoKeySize128,
|
|
FuriHalCryptoKeySize256,
|
|
} FuriHalCryptoKeySize;
|
|
|
|
/** FuriHalCryptoKey */
|
|
typedef struct {
|
|
FuriHalCryptoKeyType type;
|
|
FuriHalCryptoKeySize size;
|
|
uint8_t* data;
|
|
} FuriHalCryptoKey;
|
|
|
|
/** FuriHalCryptoGCMState Result of a GCM operation */
|
|
typedef enum {
|
|
FuriHalCryptoGCMStateOk, /**< operation successful */
|
|
FuriHalCryptoGCMStateError, /**< error during encryption/decryption */
|
|
FuriHalCryptoGCMStateAuthFailure, /**< tags do not match, auth failed */
|
|
} FuriHalCryptoGCMState;
|
|
|
|
/** Initialize cryptography layer(includes AES engines, PKA and RNG) */
|
|
void furi_hal_crypto_init(void);
|
|
|
|
/** Verify factory provisioned keys
|
|
*
|
|
* @param keys_nb The keys number of
|
|
* @param valid_keys_nb The valid keys number of
|
|
*
|
|
* @return true if all enclave keys are intact, false otherwise
|
|
*/
|
|
bool furi_hal_crypto_enclave_verify(uint8_t* keys_nb, uint8_t* valid_keys_nb);
|
|
|
|
/** Ensure that requested slot and slots before this slot contains keys.
|
|
*
|
|
* This function is used to provision FURI_HAL_CRYPTO_ENCLAVE_UNIQUE_KEY_SLOT. Also you
|
|
* may want to use it to generate some unique keys in user key slot range.
|
|
*
|
|
* @warning Because of the sequential nature of the secure enclave this
|
|
* method will generate key for all slots from
|
|
* FURI_HAL_CRYPTO_ENCLAVE_FACTORY_KEY_SLOT_END to the slot your requested.
|
|
* Keys are generated using on-chip RNG.
|
|
*
|
|
* @param[in] key_slot The key slot to enclave
|
|
*
|
|
* @return true if key exists or created, false if enclave corrupted
|
|
*/
|
|
bool furi_hal_crypto_enclave_ensure_key(uint8_t key_slot);
|
|
|
|
/** Store key in crypto enclave
|
|
*
|
|
* @param key FuriHalCryptoKey to be stored
|
|
* @param slot pointer to int where enclave slot will be stored
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_enclave_store_key(FuriHalCryptoKey* key, uint8_t* slot);
|
|
|
|
/** Init AES engine and load key from crypto enclave
|
|
*
|
|
* @warning Use only with furi_hal_crypto_enclave_unload_key()
|
|
*
|
|
* @param slot enclave slot
|
|
* @param[in] iv pointer to 16 bytes Initialization Vector data
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_enclave_load_key(uint8_t slot, const uint8_t* iv);
|
|
|
|
/** Unload key and deinit AES engine
|
|
*
|
|
* @warning Use only with furi_hal_crypto_enclave_load_key()
|
|
*
|
|
* @param slot enclave slot
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_enclave_unload_key(uint8_t slot);
|
|
|
|
/** Init AES engine and load supplied key
|
|
*
|
|
* @warning Use only with furi_hal_crypto_unload_key()
|
|
*
|
|
* @param[in] key pointer to 32 bytes key data
|
|
* @param[in] iv pointer to 16 bytes Initialization Vector data
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_load_key(const uint8_t* key, const uint8_t* iv);
|
|
|
|
/** Unload key and de-init AES engine
|
|
*
|
|
* @warning Use this function only with furi_hal_crypto_load_key()
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_unload_key(void);
|
|
|
|
/** Encrypt data
|
|
*
|
|
* @param input pointer to input data
|
|
* @param output pointer to output data
|
|
* @param size input/output buffer size in bytes
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_encrypt(const uint8_t* input, uint8_t* output, size_t size);
|
|
|
|
/** Decrypt data
|
|
*
|
|
* @param input pointer to input data
|
|
* @param output pointer to output data
|
|
* @param size input/output buffer size in bytes
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_decrypt(const uint8_t* input, uint8_t* output, size_t size);
|
|
|
|
/** Encrypt the input using AES-CTR
|
|
*
|
|
* Decryption can be performed by supplying the ciphertext as input. Inits and
|
|
* deinits the AES engine internally.
|
|
*
|
|
* @param[in] key pointer to 32 bytes key data
|
|
* @param[in] iv pointer to 12 bytes Initialization Vector data
|
|
* @param[in] input pointer to input data
|
|
* @param[out] output pointer to output data
|
|
* @param length length of the input and output in bytes
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_ctr(
|
|
const uint8_t* key,
|
|
const uint8_t* iv,
|
|
const uint8_t* input,
|
|
uint8_t* output,
|
|
size_t length);
|
|
|
|
/** Encrypt/decrypt the input using AES-GCM
|
|
*
|
|
* When decrypting the tag generated needs to be compared to the tag attached to
|
|
* the ciphertext in a constant-time fashion. If the tags are not equal, the
|
|
* decryption failed and the plaintext returned needs to be discarded. Inits and
|
|
* deinits the AES engine internally.
|
|
*
|
|
* @param[in] key pointer to 32 bytes key data
|
|
* @param[in] iv pointer to 12 bytes Initialization Vector data
|
|
* @param[in] aad pointer to additional authentication data
|
|
* @param aad_length length of the additional authentication data in bytes
|
|
* @param[in] input pointer to input data
|
|
* @param[out] output pointer to output data
|
|
* @param length length of the input and output in bytes
|
|
* @param[out] tag pointer to 16 bytes space for the tag
|
|
* @param decrypt true for decryption, false otherwise
|
|
*
|
|
* @return true on success
|
|
*/
|
|
bool furi_hal_crypto_gcm(
|
|
const uint8_t* key,
|
|
const uint8_t* iv,
|
|
const uint8_t* aad,
|
|
size_t aad_length,
|
|
const uint8_t* input,
|
|
uint8_t* output,
|
|
size_t length,
|
|
uint8_t* tag,
|
|
bool decrypt);
|
|
|
|
/** Encrypt the input using AES-GCM and generate a tag
|
|
*
|
|
* Inits and deinits the AES engine internally.
|
|
*
|
|
* @param[in] key pointer to 32 bytes key data
|
|
* @param[in] iv pointer to 12 bytes Initialization Vector data
|
|
* @param[in] aad pointer to additional authentication data
|
|
* @param aad_length length of the additional authentication data in bytes
|
|
* @param[in] input pointer to input data
|
|
* @param[out] output pointer to output data
|
|
* @param length length of the input and output in bytes
|
|
* @param[out] tag pointer to 16 bytes space for the tag
|
|
*
|
|
* @return FuriHalCryptoGCMStateOk on success, FuriHalCryptoGCMStateError on
|
|
* failure
|
|
*/
|
|
FuriHalCryptoGCMState furi_hal_crypto_gcm_encrypt_and_tag(
|
|
const uint8_t* key,
|
|
const uint8_t* iv,
|
|
const uint8_t* aad,
|
|
size_t aad_length,
|
|
const uint8_t* input,
|
|
uint8_t* output,
|
|
size_t length,
|
|
uint8_t* tag);
|
|
|
|
/** Decrypt the input using AES-GCM and verify the provided tag
|
|
*
|
|
* Inits and deinits the AES engine internally.
|
|
*
|
|
* @param[in] key pointer to 32 bytes key data
|
|
* @param[in] iv pointer to 12 bytes Initialization Vector data
|
|
* @param[in] aad pointer to additional authentication data
|
|
* @param aad_length length of the additional authentication data in bytes
|
|
* @param[in] input pointer to input data
|
|
* @param[out] output pointer to output data
|
|
* @param length length of the input and output in bytes
|
|
* @param[out] tag pointer to 16 bytes tag
|
|
*
|
|
* @return FuriHalCryptoGCMStateOk on success, FuriHalCryptoGCMStateError on
|
|
* failure, FuriHalCryptoGCMStateAuthFailure if the tag does not
|
|
* match
|
|
*/
|
|
FuriHalCryptoGCMState furi_hal_crypto_gcm_decrypt_and_verify(
|
|
const uint8_t* key,
|
|
const uint8_t* iv,
|
|
const uint8_t* aad,
|
|
size_t aad_length,
|
|
const uint8_t* input,
|
|
uint8_t* output,
|
|
size_t length,
|
|
const uint8_t* tag);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|