diff options
Diffstat (limited to 'firmware/targets/f7/furi-hal/furi-hal-crypto.c')
| -rw-r--r-- | firmware/targets/f7/furi-hal/furi-hal-crypto.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/firmware/targets/f7/furi-hal/furi-hal-crypto.c b/firmware/targets/f7/furi-hal/furi-hal-crypto.c index 91875d23..f5398421 100644 --- a/firmware/targets/f7/furi-hal/furi-hal-crypto.c +++ b/firmware/targets/f7/furi-hal/furi-hal-crypto.c @@ -1,5 +1,6 @@ #include <furi-hal-crypto.h> #include <furi-hal-bt.h> +#include <furi-hal-random.h> #include <furi.h> #include <shci.h> @@ -7,10 +8,119 @@ CRYP_HandleTypeDef crypt; +#define ENCLAVE_FACTORY_KEY_SLOTS 10 +#define ENCLAVE_SIGNATURE_SIZE 16 + +static const uint8_t enclave_signature_iv[ENCLAVE_FACTORY_KEY_SLOTS][16] = { + {0xac, 0x5d, 0x68, 0xb8, 0x79, 0x74, 0xfc, 0x7f, 0x45, 0x02, 0x82, 0xf1, 0x48, 0x7e, 0x75, 0x8a}, + {0x38, 0xe6, 0x6a, 0x90, 0x5e, 0x5b, 0x8a, 0xa6, 0x70, 0x30, 0x04, 0x72, 0xc2, 0x42, 0xea, 0xaf}, + {0x73, 0xd5, 0x8e, 0xfb, 0x0f, 0x4b, 0xa9, 0x79, 0x0f, 0xde, 0x0e, 0x53, 0x44, 0x7d, 0xaa, 0xfd}, + {0x3c, 0x9a, 0xf4, 0x43, 0x2b, 0xfe, 0xea, 0xae, 0x8c, 0xc6, 0xd1, 0x60, 0xd2, 0x96, 0x64, 0xa9}, + {0x10, 0xac, 0x7b, 0x63, 0x03, 0x7f, 0x43, 0x18, 0xec, 0x9d, 0x9c, 0xc4, 0x01, 0xdc, 0x35, 0xa7}, + {0x26, 0x21, 0x64, 0xe6, 0xd0, 0xf2, 0x47, 0x49, 0xdc, 0x36, 0xcd, 0x68, 0x0c, 0x91, 0x03, 0x44}, + {0x7a, 0xbd, 0xce, 0x9c, 0x24, 0x7a, 0x2a, 0xb1, 0x3c, 0x4f, 0x5a, 0x7d, 0x80, 0x3e, 0xfc, 0x0d}, + {0xcd, 0xdd, 0xd3, 0x02, 0x85, 0x65, 0x43, 0x83, 0xf9, 0xac, 0x75, 0x2f, 0x21, 0xef, 0x28, 0x6b}, + {0xab, 0x73, 0x70, 0xe8, 0xe2, 0x56, 0x0f, 0x58, 0xab, 0x29, 0xa5, 0xb1, 0x13, 0x47, 0x5e, 0xe8}, + {0x4f, 0x3c, 0x43, 0x77, 0xde, 0xed, 0x79, 0xa1, 0x8d, 0x4c, 0x1f, 0xfd, 0xdb, 0x96, 0x87, 0x2e}, +}; + +static const uint8_t enclave_signature_input[ENCLAVE_FACTORY_KEY_SLOTS][ENCLAVE_SIGNATURE_SIZE] = { + {0x9f, 0x5c, 0xb1, 0x43, 0x17, 0x53, 0x18, 0x8c, 0x66, 0x3d, 0x39, 0x45, 0x90, 0x13, 0xa9, 0xde}, + {0xc5, 0x98, 0xe9, 0x17, 0xb8, 0x97, 0x9e, 0x03, 0x33, 0x14, 0x13, 0x8f, 0xce, 0x74, 0x0d, 0x54}, + {0x34, 0xba, 0x99, 0x59, 0x9f, 0x70, 0x67, 0xe9, 0x09, 0xee, 0x64, 0x0e, 0xb3, 0xba, 0xfb, 0x75}, + {0xdc, 0xfa, 0x6c, 0x9a, 0x6f, 0x0a, 0x3e, 0xdc, 0x42, 0xf6, 0xae, 0x0d, 0x3c, 0xf7, 0x83, 0xaf}, + {0xea, 0x2d, 0xe3, 0x1f, 0x02, 0x99, 0x1a, 0x7e, 0x6d, 0x93, 0x4c, 0xb5, 0x42, 0xf0, 0x7a, 0x9b}, + {0x53, 0x5e, 0x04, 0xa2, 0x49, 0xa0, 0x73, 0x49, 0x56, 0xb0, 0x88, 0x8c, 0x12, 0xa0, 0xe4, 0x18}, + {0x7d, 0xa7, 0xc5, 0x21, 0x7f, 0x12, 0x95, 0xdd, 0x4d, 0x77, 0x01, 0xfa, 0x71, 0x88, 0x2b, 0x7f}, + {0xdc, 0x9b, 0xc5, 0xa7, 0x6b, 0x84, 0x5c, 0x37, 0x7c, 0xec, 0x05, 0xa1, 0x9f, 0x91, 0x17, 0x3b}, + {0xea, 0xcf, 0xd9, 0x9b, 0x86, 0xcd, 0x2b, 0x43, 0x54, 0x45, 0x82, 0xc6, 0xfe, 0x73, 0x1a, 0x1a}, + {0x77, 0xb8, 0x1b, 0x90, 0xb4, 0xb7, 0x32, 0x76, 0x8f, 0x8a, 0x57, 0x06, 0xc7, 0xdd, 0x08, 0x90}, +}; + +static const uint8_t enclave_signature_expected[ENCLAVE_FACTORY_KEY_SLOTS][ENCLAVE_SIGNATURE_SIZE] = { + {0xe9, 0x9a, 0xce, 0xe9, 0x4d, 0xe1, 0x7f, 0x55, 0xcb, 0x8a, 0xbf, 0xf2, 0x4d, 0x98, 0x27, 0x67}, + {0x34, 0x27, 0xa7, 0xea, 0xa8, 0x98, 0x66, 0x9b, 0xed, 0x43, 0xd3, 0x93, 0xb5, 0xa2, 0x87, 0x8e}, + {0x6c, 0xf3, 0x01, 0x78, 0x53, 0x1b, 0x11, 0x32, 0xf0, 0x27, 0x2f, 0xe3, 0x7d, 0xa6, 0xe2, 0xfd}, + {0xdf, 0x7f, 0x37, 0x65, 0x2f, 0xdb, 0x7c, 0xcf, 0x5b, 0xb6, 0xe4, 0x9c, 0x63, 0xc5, 0x0f, 0xe0}, + {0x9b, 0x5c, 0xee, 0x44, 0x0e, 0xd1, 0xcb, 0x5f, 0x28, 0x9f, 0x12, 0x17, 0x59, 0x64, 0x40, 0xbb}, + {0x94, 0xc2, 0x09, 0x98, 0x62, 0xa7, 0x2b, 0x93, 0xed, 0x36, 0x1f, 0x10, 0xbc, 0x26, 0xbd, 0x41}, + {0x4d, 0xb2, 0x2b, 0xc5, 0x96, 0x47, 0x61, 0xf4, 0x16, 0xe0, 0x81, 0xc3, 0x8e, 0xb9, 0x9c, 0x9b}, + {0xc3, 0x6b, 0x83, 0x55, 0x90, 0x38, 0x0f, 0xea, 0xd1, 0x65, 0xbf, 0x32, 0x4f, 0x8e, 0x62, 0x5b}, + {0x8d, 0x5e, 0x27, 0xbc, 0x14, 0x4f, 0x08, 0xa8, 0x2b, 0x14, 0x89, 0x5e, 0xdf, 0x77, 0x04, 0x31}, + {0xc9, 0xf7, 0x03, 0xf1, 0x6c, 0x65, 0xad, 0x49, 0x74, 0xbe, 0x00, 0x54, 0xfd, 0xa6, 0x9c, 0x32}, +}; + void furi_hal_crypto_init() { FURI_LOG_I(TAG, "Init OK"); } +static bool furi_hal_crypto_generate_unique_keys(uint8_t start_slot, uint8_t end_slot) { + FuriHalCryptoKey key; + uint8_t key_data[32]; + FURI_LOG_I(TAG, "Generating keys %u..%u", start_slot, end_slot); + for (uint8_t slot = start_slot; slot <= end_slot; slot++) { + key.type = FuriHalCryptoKeyTypeSimple; + key.size = FuriHalCryptoKeySize256; + key.data = key_data; + furi_hal_random_fill_buf(key_data, 32); + if (!furi_hal_crypto_store_add_key(&key, &slot)) { + FURI_LOG_E(TAG, "Error writing key to slot %u", slot); + return false; + } + } + return true; +} + +bool furi_hal_crypto_verify_key(uint8_t key_slot) { + uint8_t keys_nb = 0; + uint8_t valid_keys_nb = 0; + uint8_t last_valid_slot = ENCLAVE_FACTORY_KEY_SLOTS; + uint8_t empty_iv[16]; + furi_hal_crypto_verify_enclave(&keys_nb, &valid_keys_nb); + if (key_slot <= ENCLAVE_FACTORY_KEY_SLOTS) { // It's a factory key + if (key_slot > keys_nb) + return false; + } else { // Unique key + if (keys_nb < ENCLAVE_FACTORY_KEY_SLOTS) // Some factory keys are missing + return false; + for (uint8_t i = key_slot; i > ENCLAVE_FACTORY_KEY_SLOTS; i--) { + if(furi_hal_crypto_store_load_key(i, empty_iv)) { + last_valid_slot = i; + furi_hal_crypto_store_unload_key(i); + break; + } + } + if (last_valid_slot == key_slot) + return true; + else // Generate missing unique keys + return furi_hal_crypto_generate_unique_keys(last_valid_slot+1, key_slot); + } + return true; +} + +bool furi_hal_crypto_verify_enclave(uint8_t* keys_nb, uint8_t* valid_keys_nb) { + furi_assert(keys_nb); + furi_assert(valid_keys_nb); + uint8_t keys = 0; + uint8_t keys_valid = 0; + uint8_t buffer[ENCLAVE_SIGNATURE_SIZE]; + for(size_t key_slot = 0; key_slot < ENCLAVE_FACTORY_KEY_SLOTS; key_slot++) { + if(furi_hal_crypto_store_load_key(key_slot + 1, enclave_signature_iv[key_slot])) { + keys++; + if(furi_hal_crypto_encrypt(enclave_signature_input[key_slot], buffer, ENCLAVE_SIGNATURE_SIZE)) { + keys_valid += memcmp(buffer, enclave_signature_expected[key_slot], ENCLAVE_SIGNATURE_SIZE) == 0; + } + furi_hal_crypto_store_unload_key(key_slot + 1); + } + } + *keys_nb = keys; + *valid_keys_nb = keys_valid; + if (*valid_keys_nb == ENCLAVE_FACTORY_KEY_SLOTS) + return true; + else + return false; +} + bool furi_hal_crypto_store_add_key(FuriHalCryptoKey* key, uint8_t* slot) { furi_assert(key); furi_assert(slot); |