Merge pull request #137 from AElfProject/feature/verify

feat: add verify

package.json

@@ -1,6 +1,6 @@
 {
   "name": "aelf-sdk",
-  "version": "3.4.2-alpha",
+  "version": "3.4.3",
   "description": "aelf-sdk js library",
   "main": "dist/aelf.cjs.js",
   "browser": "dist/aelf.umd.js",
@@ -49,6 +49,7 @@
     "assert": "^2.0.0",
     "bignumber.js": "^9.0.0",
     "bip39": "^3.0.2",
+    "bn.js": "^5.2.1",
     "browserify-cipher": "^1.0.1",
     "bs58": "^4.0.1",
     "buffer": "^5.2.1",

src/wallet/index.js

@@ -7,6 +7,7 @@ import * as bip39 from 'bip39';
 import hdkey from 'hdkey';
 import AES from 'crypto-js/aes';
 import encUTF8 from 'crypto-js/enc-utf8';
+import BN from 'bn.js';
 import sha256 from '../util/sha256';
 import * as keyStore from '../util/keyStore';
 import {
@@ -252,10 +253,23 @@ const sign = (hexString, keyPair) => {
   return getSignature(bytesToBeSign, keyPair);
 };
 
+const verify = (signature, msgHash, pubKey) => {
+  const rHex = signature.substring(0, 64);
+  const sHex = signature.substring(64, 128);
+  const recoveryParamHex = signature.substring(128, 130);
+  const sigObj = {
+    r: new BN(rHex, 16),
+    s: new BN(sHex, 16),
+    recoveryParam: recoveryParamHex.slice(1),
+  };
+  return ellipticEc.verify(msgHash, sigObj, Buffer.from(pubKey, "hex"));
+};
+
 export default {
   hdkey,
   bip39,
   sign,
+  verify,
   signTransaction,
   createNewWallet,
   getWalletByMnemonic,

yarn.lock

@@ -1809,6 +1809,11 @@ bn.js@^4.0.0, bn.js@^4.1.0, bn.js@^4.1.1, bn.js@^4.11.8, bn.js@^4.4.0:
   resolved "https://registry.yarnpkg.com/bn.js/-/bn.js-4.11.8.tgz#2cde09eb5ee341f484746bb0309b3253b1b1442f"
   integrity sha512-ItfYfPLkWHUjckQCk8xC+LwxgK8NYcXywGigJgSwOP8Y2iyWT4f2vsZnoOXTTbo+o5yXmIUJ4gn5538SO5S3gA==
 
+bn.js@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz#0bc527a6a0d18d0aa8d5b0538ce4a77dccfa7b70"
+  integrity sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==
+
 body-parser@1.19.0:
   version "1.19.0"
   resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"