Hawkynt

ASCON-XOF

Lightweight extendable output function (XOF) based on Ascon permutation, standardized by NIST. Supports variable-length output with efficient hardware and software implementations for constrained environments.

Properties

Property	Value
Category	Hash Functions
Sub-category	Lightweight XOF
Security status	🧪 Experimental
Complexity	Advanced
Inventor	Christoph Dobraunig, Maria Eichlseder, Florian Mendel, Martin Schläffer
Year	2014
Origin	🌐 International
Source	algorithms/hash/ascon-hash.js

Parameters

Parameter	Supported values
Output sizes	1 byte (8 bits) to 1024 bytes (8192 bits)

Security

Status: 🧪 Experimental

No vulnerabilities are recorded for this implementation.

Documentation

• NIST Lightweight Cryptography
• Ascon Official Website
• NIST SP 800-232: Ascon Standard
• CAESAR Competition

References

• Official Ascon C reference implementation
• Ascon Python reference implementation

Test vectors

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

Vector 1 — ASCON-XOF: Empty message (Count=1)

Field	Value
outputSize	32
input	(empty)
expected	5d4cbde6350ea4c174bd65b5b332f8408f99740b81aa02735eaefbcf0ba0339e

Vector 2 — ASCON-XOF: Single byte 0x00 (Count=2)

Field	Value
outputSize	32
input	00
expected	b2edbb27ac8397a55bc83d137c151de9ede048338fe907f0d3629e717846fedc

Vector 3 — ASCON-XOF: Two bytes (Count=3)

Field	Value
outputSize	32
input	0001
expected	d196461c299db714d78c267924b5786ee26fc43b3e640daa5397e38e39d39dc6

Vector 4 — ASCON-XOF: Three bytes (Count=4)

Field	Value
outputSize	32
input	000102
expected	1d18b9dd8ff9a1bf59751b88d32766c5e054910f497bff4092afc47f5885523b

Vector 5 — ASCON-XOF: Four bytes (Count=5)

Field	Value
outputSize	32
input	00010203
expected	66fb74174782afed898478aa729058d5c30af19af2f5d4e1ce65cd320594ef66

Vector 6 — ASCON-XOF: Eight bytes (Count=9)

Field	Value
outputSize	32
input	0001020304050607
expected	18427d2d29df1e0202649f032f2080363fec5de72ecae11b4f98ccc75843e7cc

Vector 7 — ASCON-XOF: Sixteen bytes (Count=17)

Field	Value
outputSize	32
input	000102030405060708090a0b0c0d0e0f
expected	c861a89cfb1335f278c96cf7ffc9753c290cbe1a4e186d2923b496bb4ea5e519

Vector 8 — ASCON-XOF: 32 bytes (Count=33)

Field	Value
outputSize	32
input	000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
expected	0b8e325b9bbf1bb43e77aa1eed93bee62b4ea1e4b0c5a696b2f5c5b09c968918

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