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Lucas H. lucashenning

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lucashenning / gist:2fd70013254868c40788f83aa041463b
Last active November 15, 2018 17:17
send ethereum transaction
View gist:2fd70013254868c40788f83aa041463b
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params”:[{ "from": "0xe0e30a6de5ad46c2dd0b8064da49cc65e40adf4e", "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567", "gas": "0x76c0", "gasPrice": "0x9184e72a000", "value": "0x9184e72a", "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"}],”id":1}' 172.31.34.23:8545
@lucashenning
lucashenning / aws-kms-eth-sign.ts
Created November 2, 2020 13:51
AWS KMS based Ethereum transaction signing
View aws-kms-eth-sign.ts
import { KMS } from 'aws-sdk';
import { keccak256 } from 'js-sha3';
import * as ethutil from 'ethereumjs-util';
import Web3 from 'web3';
import * as asn1 from 'asn1.js';
import BN from 'bn.js';
import { Transaction, TxData } from 'ethereumjs-tx';
import { TransactionReceipt } from 'web3-core/types';
const kms = new KMS({
@lucashenning
lucashenning / getEthereumAddress.ts
Last active November 2, 2020 16:48
Get Ethereum Address from ASN1 DER encoded public key
View getEthereumAddress.ts
function getEthereumAddress(publicKey: Buffer): string {
console.log("Encoded Pub Key: " + publicKey.toString('hex'));
// The public key is ASN1 encoded in a format according to
// https://tools.ietf.org/html/rfc5480#section-2
// I used https://lapo.it/asn1js to figure out how to parse this
// and defined the schema in the EcdsaPubKey object
let res = EcdsaPubKey.decode(publicKey, 'der');
let pubKeyBuffer : Buffer = res.pubKey.data;
console.log("Pub Key Buffer: " + pubKeyBuffer.toString('hex'));
@lucashenning
lucashenning / calc-eth-sig.ts
Created November 3, 2020 09:30
Typescript function to calculate a valid ethereum signature based on an ASN1 DER encoded signature
View calc-eth-sig.ts
async function calcEthSig(plaintext) {
let signature = await sign(plaintext, keyId);
if (signature.Signature == undefined) {
throw new Error('Signature is undefined.');
}
console.log("encoded sig: " + signature.Signature.toString('hex'));
let decoded = EcdsaSigAsnParse.decode(signature.Signature, 'der');
let r : BN = decoded.r;
let s : BN = decoded.s;
@lucashenning
lucashenning / recoverPubKeyFromSig.ts
Created November 3, 2020 10:48
Uses Ethereum's ecrecover to recover the Ethereum address from a signature.
View recoverPubKeyFromSig.ts
function recoverPubKeyFromSig(sig: Buffer, r : BN, s : BN, v: number) {
console.log("Recovering public key with sig " + sig.toString('hex') + " r: " + r.toString(16) + " s: " + s.toString(16));
let rBuffer = r.toBuffer();
let sBuffer = s.toBuffer();
let pubKey = ethutil.ecrecover(sig, v, rBuffer, sBuffer);
let addrBuf = ethutil.pubToAddress(pubKey);
var RecoveredEthAddr = ethutil.bufferToHex(addrBuf);
console.log( "Recovered ethereum address: " + RecoveredEthAddr);
return RecoveredEthAddr;
}
@lucashenning
lucashenning / kms-get-public-key.ts
Created November 3, 2020 12:25
AWS KMS get public key
View kms-get-public-key.ts
import { KMS } from 'aws-sdk';
const kms = new KMS({
accessKeyId: '<access_key_id>',
secretAccessKey: '<access_secret>',
region: 'us-east-1',
apiVersion: '2014-11-01',
});
kms.getPublicKey({
KeyId: '<KMS key id>'
});
@lucashenning
lucashenning / asn1-pub-key-parse.ts
Created November 3, 2020 12:26
Parse a DER encoded public key with ASN1.js
View asn1-pub-key-parse.ts
const EcdsaPubKey = asn1.define('EcdsaPubKey', function(this: any) {
// https://tools.ietf.org/html/rfc5480#section-2
this.seq().obj(
this.key('algo').seq().obj(
this.key('algorithm').objid(),
this.key('parameters').objid(),
),
this.key('pubKey').bitstr() // <-- this is what we want
);
});
@lucashenning
lucashenning / kms-sign.ts
Created November 3, 2020 12:27
AWS KMS Sign DIGEST
View kms-sign.ts
async function sign(msgHash, keyId) {
const params : KMS.SignRequest = {
KeyId: keyId,
Message: msgHash,
SigningAlgorithm: 'ECDSA_SHA_256',
MessageType: 'DIGEST'
};
return kms.sign(params).promise();
}
@lucashenning
lucashenning / ecdsa-sig-parse.ts
Created November 3, 2020 12:27
Parse a ASN1 DER encoded Sig with ASN1.js
View ecdsa-sig-parse.ts
const EcdsaSigAsnParse = asn1.define('EcdsaSig', function(this: any) {
this.seq().obj(
this.key('r').int(),
this.key('s').int(),
);
});
View StandaloneERC721.sol
pragma solidity ^0.5.0;
import "https://github.com/OpenZeppelin/openzeppelin-sdk/blob/v2.5.0/packages/lib/contracts/Initializable.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC721/ERC721.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC721/ERC721Enumerable.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC721/ERC721Metadata.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC721/ERC721MetadataMintable.sol";
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.5.0/contracts/token/ERC721/ERC721Pausable.sol";