Momentum-Apps/services/crypto/crypto_facade.c

#include "crypto_facade.h"
#include <furi_hal_crypto.h>
#include <furi/core/check.h>
#include "crypto_v1.h"
#include "crypto_v2.h"
#include "constants.h"

bool totp_crypto_check_key_slot(uint8_t key_slot) {
    uint8_t empty_iv[CRYPTO_IV_LENGTH] = {0};
    if(key_slot < ACCEPTABLE_CRYPTO_KEY_SLOT_START || key_slot > ACCEPTABLE_CRYPTO_KEY_SLOT_END) {
        return false;
    }

    return furi_hal_crypto_verify_key(key_slot) &&
           furi_hal_crypto_store_load_key(key_slot, empty_iv) &&
           furi_hal_crypto_store_unload_key(key_slot);
}

uint8_t* totp_crypto_encrypt(
    const uint8_t* plain_data,
    const size_t plain_data_length,
    const CryptoSettings* crypto_settings,
    size_t* encrypted_data_length) {
    if(crypto_settings->crypto_version == 1) {
        return totp_crypto_encrypt_v1(
            plain_data, plain_data_length, crypto_settings, encrypted_data_length);
    }

    if(crypto_settings->crypto_version == 2) {
        return totp_crypto_encrypt_v2(
            plain_data, plain_data_length, crypto_settings, encrypted_data_length);
    }

    furi_crash("Unsupported crypto version");
}

uint8_t* totp_crypto_decrypt(
    const uint8_t* encrypted_data,
    const size_t encrypted_data_length,
    const CryptoSettings* crypto_settings,
    size_t* decrypted_data_length) {
    if(crypto_settings->crypto_version == 1) {
        return totp_crypto_decrypt_v1(
            encrypted_data, encrypted_data_length, crypto_settings, decrypted_data_length);
    }

    if(crypto_settings->crypto_version == 2) {
        return totp_crypto_decrypt_v2(
            encrypted_data, encrypted_data_length, crypto_settings, decrypted_data_length);
    }

    furi_crash("Unsupported crypto version");
}

CryptoSeedIVResult
    totp_crypto_seed_iv(CryptoSettings* crypto_settings, const uint8_t* pin, uint8_t pin_length) {
    if(crypto_settings->crypto_version == 1) {
        return totp_crypto_seed_iv_v1(crypto_settings, pin, pin_length);
    }

    if(crypto_settings->crypto_version == 2) {
        return totp_crypto_seed_iv_v2(crypto_settings, pin, pin_length);
    }

    furi_crash("Unsupported crypto version");
}

bool totp_crypto_verify_key(const CryptoSettings* crypto_settings) {
    if(crypto_settings->crypto_version == 1) {
        return totp_crypto_verify_key_v1(crypto_settings);
    }

    if(crypto_settings->crypto_version == 2) {
        return totp_crypto_verify_key_v2(crypto_settings);
    }

    furi_crash("Unsupported crypto version");
}