mirror of
https://github.com/ethereum/go-ethereum.git
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104 lines
3.1 KiB
Go
104 lines
3.1 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package discv5
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/rand"
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"testing"
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"github.com/ethereum/go-ethereum/crypto"
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)
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const testMaxPacketLen = 1000
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func testPacket(t *testing.T, encA, encB symmEncryption, packetLen int) {
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packet := make([]byte, packetLen)
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rand.Read(packet[:])
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enc := encA.encode(packet)
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if len(enc) > testMaxPacketLen {
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t.Errorf("Encoded packet is too long")
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}
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dec := encB.decode(enc)
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if !bytes.Equal(packet, dec) {
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t.Errorf("Decoded packet does not match original (packet = %x size = %d enc = %x encSize = %d dec = %x decSize = %d)", packet, len(packet), enc, len(enc), dec, len(dec))
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}
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}
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func TestEcdhAes256Encryption(t *testing.T) {
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privKeyA, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader)
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if err != nil {
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panic(err)
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}
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pubKeyA := &privKeyA.PublicKey
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privKeyB, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader)
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if err != nil {
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panic(err)
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}
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pubKeyB := &privKeyB.PublicKey
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encA, err := newEcdhAes256Encryption(privKeyA, pubKeyB, testMaxPacketLen)
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if err != nil {
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panic(err)
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}
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encB, err := newEcdhAes256Encryption(privKeyB, pubKeyA, testMaxPacketLen)
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if err != nil {
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panic(err)
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}
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maxDecLen := encA.maxDecodedLength()
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for i := 0; i <= maxDecLen; i++ {
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testPacket(t, encA, encB, i)
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testPacket(t, encB, encA, i)
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}
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}
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func testPacketAsymm(t *testing.T, encA, encB asymmEncryption, pubKeyB *ecdsa.PublicKey, packetLen int) {
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packet := make([]byte, packetLen)
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rand.Read(packet[:])
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enc, _ := encA.encode(packet, pubKeyB)
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if len(enc) > testMaxPacketLen {
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t.Errorf("Encoded packet is too long")
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}
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dec := encB.decode(enc)
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if !bytes.Equal(packet, dec) {
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t.Errorf("Decoded packet does not match original (packet = %x size = %d enc = %x encSize = %d dec = %x decSize = %d)", packet, len(packet), enc, len(enc), dec, len(dec))
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}
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}
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func TestEciesEncryption(t *testing.T) { //TODO fix this
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privKeyA, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader)
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if err != nil {
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panic(err)
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}
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pubKeyA := &privKeyA.PublicKey
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privKeyB, err := ecdsa.GenerateKey(crypto.S256(), rand.Reader)
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if err != nil {
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panic(err)
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}
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pubKeyB := &privKeyB.PublicKey
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encA := newEciesEncryption(privKeyA, testMaxPacketLen)
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encB := newEciesEncryption(privKeyB, testMaxPacketLen)
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maxDecLen := encA.maxDecodedLength()
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for i := 0; i <= maxDecLen; i++ {
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testPacketAsymm(t, encA, encB, pubKeyB, i)
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testPacketAsymm(t, encB, encA, pubKeyA, i)
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}
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}
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