cryptography-core/dev.whyoleg.cryptography.algorithms/EdDSA

EdDSA

@SubclassOptInRequired(markerClass = [CryptographyProviderApi::class])

interface EdDSA : CryptographyAlgorithm(source)

Edwards-curve Digital Signature Algorithm (EdDSA) as defined in RFC 8032.

EdDSA provides digital signature generation and verification using twisted Edwards curves. Unlike ECDSA, EdDSA is deterministic (no random nonce) and does not require a separate digest parameter — the hash is built into the algorithm.

val keys = provider.get(EdDSA).keyPairGenerator(EdDSA.Curve.Ed25519).generateKey()
val signature = keys.privateKey.signatureGenerator().generateSignature(data)
keys.publicKey.signatureVerifier().verifySignature(data, signature)

For signatures using Weierstrass curves, see ECDSA.

Types

object Companion : CryptographyAlgorithmId<EdDSA>

enum Curve : Enum<EdDSA.Curve>

Supported EdDSA curves.

@SubclassOptInRequired(markerClass = [CryptographyProviderApi::class])

interface KeyPair

@SubclassOptInRequired(markerClass = [CryptographyProviderApi::class])

interface PrivateKey : Encodable<EdDSA.PrivateKey.Format> , PublicKeyAccessor<EdDSA.PublicKey>

An EdDSA private key that provides signature generation via signatureGenerator.

@SubclassOptInRequired(markerClass = [CryptographyProviderApi::class])

interface PublicKey : Encodable<EdDSA.PublicKey.Format>

An EdDSA public key that provides signature verification via signatureVerifier.

Properties

open override val id: CryptographyAlgorithmId<EdDSA>

The typed identifier that uniquely distinguishes this algorithm and is used to look it up from a CryptographyProvider.

Functions

keyPairGenerator

abstract fun keyPairGenerator(curve: EdDSA.Curve): KeyGenerator<EdDSA.KeyPair>

Returns a KeyGenerator that generates EdDSA key pairs on the given curve.

privateKeyDecoder

abstract fun privateKeyDecoder(curve: EdDSA.Curve): Decoder<EdDSA.PrivateKey.Format, EdDSA.PrivateKey>

Returns a Decoder that decodes EdDSA private keys on the given curve from the specified PrivateKey.Format.

publicKeyDecoder

abstract fun publicKeyDecoder(curve: EdDSA.Curve): Decoder<EdDSA.PublicKey.Format, EdDSA.PublicKey>

Returns a Decoder that decodes EdDSA public keys on the given curve from the specified PublicKey.Format.