flutter_curve25519

Description:

flutter curve25519

Axlsign #
Ed25519-like signatures with X25519 keys, Axolotl-style.
https://pub.dev/packages/flutter_curve25519
Functions #
Functions accept and return []uint8 Arrays.
generateKeyPair(seed) -> keyPair #
Generates a new key pair from the given 32-byte secret seed (which should be
generated with a CSPRNG) and returns it as object:
keyPair = {
privateKey: IntArray // 32-byte private key
publicKey: IntArray // 32-byte public key
}
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The returned keys can be used for signing and key agreement.
sign(privateKey, message, [random]) -> signature #
Signs the given message using the private key and returns signature.
Optional random data argument (which must have 64 random bytes) turns on
hash separation and randomization to make signatures non-deterministic.
verify(publicKey, message, signature) -> 1 | 0 #
Verifies the given signature for the message using the given private key.
Returns 1 if the signature is valid, 0 otherwise.
signMessage(privateKey, message, [random]) -> signedMessage #
Signs the given message using the private key and returns
a signed message (signature concatenated with the message copy).
Optional random data argument (which must have 64 random bytes) turns on
hash separation and randomization to make signatures non-deterministic.
openMessage(publicKey, signedMessage) -> message | null #
Verifies signed message with the public key and returns the original message
without signature if it's correct or nil if verification fails.
sharedKey(privateKey, publicKey) -> rawSharedKey #
Returns a raw shared key between own private key and peer's public key (in
other words, this is an ECC Diffie-Hellman function X25519, performing
scalar multiplication).
Credits #
Ported to Go (https://golang.org/) by Miguel Lucero [email protected] nov 2017.
You can use it under MIT or CC0 license.
Curve25519 golang github repository https://github.com/miguelsandro/curve25519-go
Curve25519 signatures idea and math by Trevor Perrin
https://moderncrypto.org/mail-archive/curves/2014/000205.html
Derived from axlsign.js written by Dmitry Chestnykh.
https://github.com/wavesplatform/curve25519-js