mirror of
https://github.com/matrix-org/dendrite.git
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109 lines
3 KiB
Go
109 lines
3 KiB
Go
// Copyright 2022 The Matrix.org Foundation C.I.C.
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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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package test
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import (
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"crypto/ecdsa"
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"errors"
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"fmt"
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"strings"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/spruceid/siwe-go"
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)
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const EthereumTestNetworkId = 4 // Rinkeby test network ID
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const TestServerName = "localhost"
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type EthereumTestWallet struct {
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Eip155UserId string
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PublicAddress string
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PrivateKey *ecdsa.PrivateKey
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}
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// https://goethereumbook.org/wallet-generate/
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func CreateTestAccount() (*EthereumTestWallet, error) {
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// Create a new public / private key pair.
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privateKey, err := crypto.GenerateKey()
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if err != nil {
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return nil, err
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}
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// Get the public key
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publicKey := privateKey.Public()
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// Transform public key to the Ethereum address
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publicKeyEcdsa, ok := publicKey.(*ecdsa.PublicKey)
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if !ok {
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return nil, errors.New("error casting public key to ECDSA")
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}
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address := crypto.PubkeyToAddress(*publicKeyEcdsa).Hex()
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eip155UserId := fmt.Sprintf("eip155=3a%d=3a%s", EthereumTestNetworkId, address)
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return &EthereumTestWallet{
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PublicAddress: address,
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PrivateKey: privateKey,
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Eip155UserId: eip155UserId,
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},
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nil
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}
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func CreateEip4361TestMessage(
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publicAddress string,
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) (*siwe.Message, error) {
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options := make(map[string]interface{})
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options["chainId"] = 4 // Rinkeby test network
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options["statement"] = "This is a test statement"
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message, err := siwe.InitMessage(
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TestServerName,
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publicAddress,
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"https://localhost/login",
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siwe.GenerateNonce(),
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options,
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)
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if err != nil {
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return nil, err
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}
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return message, nil
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}
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func FromEip4361MessageToString(message *siwe.Message) string {
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// Escape the formatting characters to
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// prevent unmarshal exceptions.
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str := strings.ReplaceAll(message.String(), "\n", "\\n")
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str = strings.ReplaceAll(str, "\t", "\\t")
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return str
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}
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// https://goethereumbook.org/signature-generate/
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func SignMessage(message string, privateKey *ecdsa.PrivateKey) (string, error) {
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msg := fmt.Sprintf("\x19Ethereum Signed Message:\n%d%s", len(message), message)
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data := []byte(msg)
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hash := crypto.Keccak256Hash(data)
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signature, err := crypto.Sign(hash.Bytes(), privateKey)
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if err != nil {
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return "", err
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}
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// https://github.com/ethereum/go-ethereum/blob/55599ee95d4151a2502465e0afc7c47bd1acba77/internal/ethapi/api.go#L442
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signature[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper
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return hexutil.Encode(signature), nil
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}
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