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|
SunEC
=====
| Version: ``jdk-21-ga`` (JDK 21)
| Repository: https://github.com/openjdk/jdk/
| Docs:
Primitives
----------
ECDH, ECDSA, x25519, Ed25519
P-256
^^^^^
The only special thing is the generator scalarmult, ``Secp256R1GeneratorMultiplier`` which is a Comb.
ECDH
^^^^
KeyGen:
- Short-Weierstrass
- Fixed Window (width = 4) via ``ECKeyPairGenerator.generateKeyPair -> ECKeyPairGenerator.generateKeyPairImpl -> ECPrivateKeyImpl.calculatePublicKey -> ECOperations.multiply -> Default(PointMultiplier).pointMultiply``
- projective-3 coords
- RCB-based formulas: `add-sunec-v21 <https://github.com/J08nY/pyecsca/blob/master/test/data/formulas/add-sunec-v21.op3>`__,
`dbl-sunec-v21 <https://github.com/J08nY/pyecsca/blob/master/test/data/formulas/dbl-sunec-v21.op3>`__,
Derive:
- Same as KeyGen.
ECDSA
^^^^^
Same as ECDH.
x25519
^^^^^^
KeyGen:
- Montgomery
- Montgomery ladder
- xz
- Ladder formula from RFC 7748
Derive:
- Same as KeyGen.
Ed25519
^^^^^^^
KeyGen:
- Twisted-Edwards
- Double and add always
- Extended coords
- Unknown formulas: `add-sunec-v21-ed25519 <https://github.com/J08nY/pyecsca/blob/master/test/data/formulas/add-sunec-v21-ed25519.op3>`__, `dbl-sunec-v21-ed25519 <https://github.com/J08nY/pyecsca/blob/master/test/data/formulas/dbl-sunec-v21-ed25519.op3>`__
Sign:
- Same as KeyGen.
Verify:
- Same as KeyGen.
|
