GOST 28147-89 (Magma) variant from the DarkCrypt Total Commander plugin: textbook 32-round Feistel schedule (K0..K7 x3, then K7..K0), but with a non-standard, hardcoded S-box set (one table is not even a bijection). 64-bit block, 256-bit key.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Intermediate |
| Inventor | Soviet Union cryptographers (base GOST 28147-89); DarkCrypt variant by Alexander Myasnikov |
| Year | 1989 |
| Origin | 🇷🇺 Russia |
| Source | algorithms/block/darkcrypt-gost.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 32 bytes (256 bits) |
| Block sizes | 8 bytes (64 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Non-standard S-box | Uses a hardcoded S-box set where one of the four substitution tables is not a bijection; unanalyzed and not recommended for real use. | Use AES or another vetted cipher. |
3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.
Vector 1 — DarkCrypt Gost — zero key/plaintext
| Field | Value |
|---|---|
key |
0000000000000000000000000000000000000000000000000000000000000000 |
input |
0000000000000000 |
expected |
0b07331dd419cc0d |
Vector 2 — DarkCrypt Gost — incrementing key/plaintext
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f |
input |
0001020304050607 |
expected |
5a167e04fd82ee68 |
Vector 3 — DarkCrypt Gost — shifted incrementing key/plaintext
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20 |
input |
1011121314151617 |
expected |
5c0fb1419d6b9c6d |