XYOracleNetwork/sdk-core-kotlin

package network.xyo.sdkcorekotlin.crypto.signing.ecdsa

import network.xyo.sdkcorekotlin.crypto.signing.XyoPrivateKey
import network.xyo.sdkcorekotlin.schemas.XyoSchemas
import network.xyo.sdkobjectmodelkotlin.structure.XyoObjectStructure
import org.bouncycastle.jce.interfaces.ECPrivateKey
import org.bouncycastle.jce.spec.ECParameterSpec
import java.math.BigInteger

/**
 * A base class for EC private key generation.
 */
abstract class XyoEcPrivateKey : ECPrivateKey, XyoPrivateKey(byteArrayOf(), 0) {

    override fun getAlgorithm(): String {
        return "ECDSA"
    }

    override fun getEncoded(): ByteArray {
        return d.toByteArray()
    }

    override fun getFormat(): String {
        return "XyoEcPrivateKey"
    }

    override var allowedOffset: Int = 0

    override var item: ByteArray = byteArrayOf()
        get() = XyoObjectStructure.newInstance(XyoSchemas.EC_PRIVATE_KEY, d.toByteArray()).bytesCopy

    companion object {

        fun getInstance(byteArray: ByteArray, ecSpec: ECParameterSpec): XyoEcPrivateKey {
            return object : XyoEcPrivateKey() {
                override var item: ByteArray = byteArray

                override fun getParameters(): ECParameterSpec {
                    return ecSpec
                }

                override fun getD(): BigInteger {
                    return BigInteger(valueCopy)
                }
            }
        }

        fun getInstanceFromQ (q : BigInteger, ecSpec: ECParameterSpec): XyoEcPrivateKey {
            return object : XyoEcPrivateKey() {
                override fun getD(): BigInteger {
                    return q
                }

                override fun getParameters(): ECParameterSpec {
                    return ecSpec
                }
            }
        }
    }
}