Hawkynt

Enrupt-512-512 (DarkCrypt)

EnRUPT-family ARX block cipher from the DarkCrypt Total Commander plugin. 512-bit block and 512-bit key, both as 16 little-endian 32-bit words. 192 sliding-window add/rotate/xor steps with round function 9ror((2a)^b^k^i,8); no S-boxes.

Properties

Property	Value
Category	Block Ciphers
Sub-category	Block Cipher
Security status	🎓 Educational Only
Complexity	Intermediate
Inventor	Sean O’Neil (EnRUPT family); DarkCrypt variant by Alexander Myasnikov
Year	2013
Origin	🇷🇺 Russia
Source	algorithms/block/darkcrypt-enrupt.js

Parameters

Parameter	Supported values
Key sizes	64 bytes (512 bits)
Block sizes	64 bytes (512 bits)

Security

Status: 🎓 Educational Only

Known vulnerabilities

Issue	Description	Mitigation
Non-standard / unvetted variant	A custom EnRUPT-family construction with unusual step count and window layout; the EnRUPT family itself was not selected in the SHA-3/eSTREAM processes and this variant is unanalyzed.	Use AES or another vetted cipher.

Documentation

• DarkCrypt plugin (Total Commander PlugRing)
• EnRUPT (base design by Sean O’Neil)

Test vectors

3 vectors ship with this algorithm and run in the test suite. Byte values are hexadecimal.

Vector 1 — DarkCrypt Enrupt — zero key/plaintext

Field	Value
key	00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000
input	00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000
expected	0c77adc0d76a5fbe7f05e481327af720 20541cdfe571ef6e8f141385dde00975 27f676c436fc90dc9abbff82cdc05986 ad92b7f1c06b611e0b5258d9fbc8d1fb

Vector 2 — DarkCrypt Enrupt — incrementing key/plaintext

Field	Value
key	000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f
input	000102030405060708090a0b0c0d0e0f 101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f
expected	25395342858a086e553ea6f50c8d9288 7f6c7220fd6c7b8b68865a49482f83d7 c8ec3200d836cd8ab87b0d7cf127d021 5b51af3de44a805e9aab5e05eabb97d8

Vector 3 — DarkCrypt Enrupt — shifted incrementing key/plaintext

Field	Value
key	0102030405060708090a0b0c0d0e0f10 1112131415161718191a1b1c1d1e1f20 2122232425262728292a2b2c2d2e2f30 3132333435363738393a3b3c3d3e3f40
input	101112131415161718191a1b1c1d1e1f 202122232425262728292a2b2c2d2e2f 303132333435363738393a3b3c3d3e3f 404142434445464748494a4b4c4d4e4f
expected	d1e5d9fcb3c9b9e61535c1adb9820829 92397219f2fb387465c019fc61b87e4f 43d3c9fc3390536f881a916a707003bf 33d1361aa2bf5ea0a4c102d00c6dd73b

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