3ee2635d93
* Upgrade JNI interface * Input signatures can be DER or compact format, output signatures are always in compact format * Input public keys can be compressed or uncompressed, output public keys are always uncompressed * Name and parameters match libsecp256k1's * JNI implementation is now straightforward No more ByteBuffers Exceptions are thrown in case of failures * Update src/nativeMain/kotlin/fr/acinq/secp256k1/Secp256k1Native.kt * Add public key compression method Co-authored-by: Salomon BRYS <salomon.brys@gmail.com>
77 lines
2.5 KiB
Kotlin
77 lines
2.5 KiB
Kotlin
/*
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* Copyright 2020 ACINQ SAS
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package fr.acinq.secp256k1
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import kotlin.jvm.JvmStatic
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public interface Secp256k1 {
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public fun verify(signature: ByteArray, data: ByteArray, pub: ByteArray): Boolean
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public fun sign(data: ByteArray, sec: ByteArray): ByteArray
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public fun signatureNormalize(sig: ByteArray): Pair<ByteArray, Boolean>
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public fun secKeyVerify(seckey: ByteArray): Boolean
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public fun pubkeyCreate(seckey: ByteArray): ByteArray
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public fun pubkeyParse(pubkey: ByteArray): ByteArray
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public fun cleanup()
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public fun privKeyNegate(privkey: ByteArray): ByteArray
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public fun privKeyTweakMul(privkey: ByteArray, tweak: ByteArray): ByteArray
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public fun privKeyTweakAdd(privkey: ByteArray, tweak: ByteArray): ByteArray
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public fun pubKeyNegate(pubkey: ByteArray): ByteArray
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public fun pubKeyTweakAdd(pubkey: ByteArray, tweak: ByteArray): ByteArray
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public fun pubKeyTweakMul(pubkey: ByteArray, tweak: ByteArray): ByteArray
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public fun pubKeyAdd(pubkey1: ByteArray, pubkey2: ByteArray): ByteArray
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public fun ecdh(seckey: ByteArray, pubkey: ByteArray): ByteArray
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public fun ecdsaRecover(sig: ByteArray, message: ByteArray, recid: Int): ByteArray
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public fun pubKeyCompress(pubkey: ByteArray) : ByteArray {
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return when {
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pubkey.size == 33 && (pubkey[0] == 2.toByte() || pubkey[0] == 3.toByte()) -> pubkey
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pubkey.size == 65 && pubkey[0] == 4.toByte() -> {
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val pub1 = pubkey.copyOf(33)
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pub1[0] = if (pubkey.last() % 2 == 0) 2.toByte() else 3.toByte()
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pub1
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}
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else -> throw RuntimeException("invalid public key")
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}
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}
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public companion object : Secp256k1 by getSecpk256k1() {
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@JvmStatic public fun get(): Secp256k1 = this
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}
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}
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internal expect fun getSecpk256k1(): Secp256k1
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public class Secp256k1Exception : RuntimeException {
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public constructor() : super() {}
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public constructor(message: String?) : super(message) {}
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} |