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expanded storage size and password length

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redlineo committed 2025-01-21 10:11:23 +00:00
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commit 6d8cbd1277
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README.md
+9 -2
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@@ -1,4 +1,4 @@
# RED_CRYPTO ver 0.4.0
# RED_CRYPTO ver 0.5.0
## Description
@@ -34,7 +34,7 @@ include keyboards/<your keyboard>/<path to your keymap folder>/red_crypto/red_cr
#include "red_crypto/red_crypto.h"
```
4. Enable chosen algorithms with define in `config.h`. Now you can use only `Kuznechik`.
4. Define chosen algorithms and parameters in `config.h`. Now you can use only `Kuznechik`.
```c
#define USE_KUZNECHIK_8
@@ -46,6 +46,13 @@ If you want use SHA256 of your key to encrypt passwords, define this in `config.
#define USE_SHA256_KEY
```
Change storage size (default `4`) and maximum password length (default `64`).
```c
#define STORAGE_SIZE 4
#define STORAGE_PASS_LEN 64 // use a multiple of 16, e.g. 16, 32, 64... but don't forget about available memory!
```
5. Encrypt your passwords with chosen algorithm (AES, Kuznechik). Now available only Kuznechik. You can use `CyberChef`.
> Don't use web version! We are here for security, right?
red_crypto.c
+61 -13
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@@ -2,7 +2,27 @@
#include "red_crypto.h"
uint8_t dec_pass[2][16] = {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}};
uint8_t dec_pass[STORAGE_SIZE][STORAGE_PASS_LEN] = {
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
};
// you can use key any length with SHA256, kuznechik use only 32byte
#ifdef USE_SHA256_KEY
@@ -12,6 +32,8 @@ uint8_t readed_key[128] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
uint8_t readed_key[32] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
#endif
const uint8_t test_pass_block[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
uint8_t count_char_key = 0;
uint8_t crypto_mode = 0;
@@ -53,7 +75,7 @@ size_t min_len(size_t a, size_t b) {
return b;
}
void decrypt_pass_kuzn(const uint8_t encrypted_passwords[2][16]) {
void decrypt_pass_kuzn(const uint8_t encrypted_passwords[STORAGE_SIZE][STORAGE_PASS_LEN]) {
kuz_key_t key;
w128_t x;
@@ -69,20 +91,36 @@ void decrypt_pass_kuzn(const uint8_t encrypted_passwords[2][16]) {
#ifndef USE_SHA256_KEY
kuz_set_decrypt_key(&key, readed_key);
#endif
for (uint8_t j = 0; j < 2; j++) {
for (uint8_t i = 0; i < 16; i++) {
x.b[i] = encrypted_passwords[j][i];
}
kuz_decrypt_block(&key, &x);
for (uint8_t j = 0; j < STORAGE_SIZE; j++) {
#ifdef USE_RED_CRY_DEBUG
dprintf("decrypted\t=");
#endif
for (uint8_t k = 0; k < STORAGE_PASS_LEN / 16; k++) {
uint8_t cnt_zeros=0;
for (uint8_t z = 0+k*16; z < 16+k*16; z++) {
if (encrypted_passwords[j][z] == 0x00) {
cnt_zeros++;
} else {
cnt_zeros = 0;
break;
}
}
if (cnt_zeros!=0) break; // if there is zero 8 byte block in password, e.g. password length <32 or <64
for (uint8_t i = 0 + k * 16; i < 16 + k * 16; i++) {
x.b[i%16] = encrypted_passwords[j][i];
}
kuz_decrypt_block(&key, &x);
for (uint8_t i = 0 + k * 16; i < 16 + k * 16; i++) {
dec_pass[j][i] = x.b[i%16];
}
#ifdef USE_RED_CRY_DEBUG
print_w128(&x);
print_chars_w128(&x);
#endif
for (uint8_t i = 0; i < 16; i++) {
dec_pass[j][i] = x.b[i];
}
}
};
@@ -100,12 +138,12 @@ void decrypt_pass_kuzn(const uint8_t encrypted_passwords[2][16]) {
// }
void send_chars_pass(uint8_t *out) {
for (uint8_t i = 0; i < 16 && out[i] != 0; i++) {
for (uint8_t i = 0; i < STORAGE_PASS_LEN && out[i] != 0; i++) {
send_char((char)out[i]);
}
};
uint8_t crypto_process_record_user(uint16_t keycode, keyrecord_t *record, const uint8_t encrypted_passwords[2][16]) {
uint8_t crypto_process_record_user(uint16_t keycode, keyrecord_t *record, const uint8_t encrypted_passwords[STORAGE_SIZE][STORAGE_PASS_LEN]) {
if (crypto_mode) {
switch (keycode) {
case RED_CRY_M:
@@ -134,6 +172,16 @@ uint8_t crypto_process_record_user(uint16_t keycode, keyrecord_t *record, const
send_chars_pass(dec_pass[1]);
}
break;
case RED_PASS3:
if (record->event.pressed) {
send_chars_pass(dec_pass[2]);
}
break;
case RED_PASS4:
if (record->event.pressed) {
send_chars_pass(dec_pass[3]);
}
break;
case RED_RNG:
if (record->event.pressed) {
// TODO: change seed
red_crypto.h
+25 -3
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@@ -25,14 +25,36 @@
# define MAX_KEY_LEN 128
# ifndef STORAGE_SIZE
# define STORAGE_SIZE 4
# endif
# ifdef STORAGE_PASS_LEN
# if STORAGE_PASS_LEN % 16 != 0
# error Storage password length must be a multiple of 16
# endif
# endif
# ifndef STORAGE_PASS_LEN
# define STORAGE_PASS_LEN 64
# endif
//example for encrypted 64 byte password
// const uint8_t red_enc_pass[STORAGE_SIZE][STORAGE_PASS_LEN] = {
// {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
// 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
// 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
// 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},
// };
enum red_crypto_keys {
RED_CRY_M = SAFE_RANGE + 0x80, // added safe range offset
RED_RNG,
RED_TEST,
RED_PASS1,
RED_PASS2
RED_PASS1, RED_PASS2, RED_PASS3, RED_PASS4, RED_PASS5, RED_PASS6, RED_PASS7, RED_PASS8, RED_PASS9, RED_PASS10, RED_PASS11, RED_PASS12
};
uint8_t crypto_process_record_user(uint16_t keycode, keyrecord_t *record, const uint8_t encrypted_passwords[2][16]);
uint8_t crypto_process_record_user(uint16_t keycode, keyrecord_t *record, const uint8_t encrypted_passwords[STORAGE_SIZE][STORAGE_PASS_LEN]);
#endif