Home-grown SP-network block cipher from the DarkCrypt Total Commander plugin (not related to the Rainbow signature scheme or any other published cipher named Rainbow). 256-bit key, 128-bit block, 8 rounds combining word-wise XOR, a circular AND/XOR mix, and a pair of fixed 256-entry substitution tables with position-dependent byte permutation.
| Property | Value |
|---|---|
| Category | Block Ciphers |
| Sub-category | Block Cipher |
| Security status | 🎓 Educational Only |
| Complexity | Intermediate |
| Inventor | Alexander Myasnikov (DarkCrypt / “Zarya” project) |
| Year | 2009 |
| Origin | 🇷🇺 Russia |
| Source | algorithms/block/darkcrypt-rainbow.js |
| Parameter | Supported values |
|---|---|
| Key sizes | 32 bytes (256 bits) |
| Block sizes | 16 bytes (128 bits) |
Status: 🎓 Educational Only
| Issue | Description | Mitigation |
|---|---|---|
| Undocumented home-grown design | Proprietary DarkCrypt cipher with no public specification or cryptanalysis; 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 Rainbow — zero key/plaintext
| Field | Value |
|---|---|
key |
0000000000000000000000000000000000000000000000000000000000000000 |
input |
00000000000000000000000000000000 |
expected |
c0976d52c43382351c60816706aabc5a |
Vector 2 — DarkCrypt Rainbow — incrementing key/plaintext
| Field | Value |
|---|---|
key |
000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f |
input |
000102030405060708090a0b0c0d0e0f |
expected |
cfee4bb0ffe0309628166dc2ca110aa4 |
Vector 3 — DarkCrypt Rainbow — shifted incrementing key/plaintext
| Field | Value |
|---|---|
key |
0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20 |
input |
101112131415161718191a1b1c1d1e1f |
expected |
e0d408b835a32ed5e47a12b9214a8b02 |