Add length check to getLisk32AddressFromPublicKey

elements/lisk-cryptography/src/address.ts

@@ -17,6 +17,7 @@ import {
 	BINARY_ADDRESS_LENGTH,
 	DEFAULT_LISK32_ADDRESS_PREFIX,
 	LISK32_ADDRESS_LENGTH,
+	ED25519_PUBLIC_KEY_LENGTH,
 } from './constants';
 import { getPublicKey } from './nacl';
 import { hash } from './utils';
@@ -118,7 +119,12 @@ const addressToLisk32 = (address: Buffer): string => {
 export const getLisk32AddressFromPublicKey = (
 	publicKey: Buffer,
 	prefix = DEFAULT_LISK32_ADDRESS_PREFIX,
-): string => `${prefix}${addressToLisk32(getAddressFromPublicKey(publicKey))}`;
+): string => {
+	if (publicKey.length !== ED25519_PUBLIC_KEY_LENGTH) {
+		throw new Error(`publicKey length must be ${ED25519_PUBLIC_KEY_LENGTH}.`);
+	}
+	return `${prefix}${addressToLisk32(getAddressFromPublicKey(publicKey))}`;
+};
 
 export const validateLisk32Address = (
 	address: string,

elements/lisk-cryptography/src/constants.ts

@@ -25,3 +25,4 @@ export const SHA256 = 'sha256';
 export const LISK32_CHARSET = 'zxvcpmbn3465o978uyrtkqew2adsjhfg';
 export const LISK32_ADDRESS_LENGTH = 41;
 export const MESSAGE_TAG_NON_PROTOCOL_MESSAGE = 'LSK_NPM_';
+export const ED25519_PUBLIC_KEY_LENGTH = 32;

elements/lisk-cryptography/test/address.spec.ts

@@ -24,6 +24,7 @@ import {
 	LISK32_CHARSET,
 	DEFAULT_LISK32_ADDRESS_PREFIX,
 	LISK32_ADDRESS_LENGTH,
+	ED25519_PUBLIC_KEY_LENGTH,
 } from '../src/constants';
 import * as utils from '../src/utils';
 
@@ -57,8 +58,20 @@ describe('address', () => {
 	});
 
 	describe('#getLisk32AddressFromPublicKey', () => {
+		it('should reject when publicKey length not equal to ED25519_PUBLIC_KEY_LENGTH', () => {
+			expect(() =>
+				getLisk32AddressFromPublicKey(
+					Buffer.alloc(ED25519_PUBLIC_KEY_LENGTH - 1),
+					DEFAULT_LISK32_ADDRESS_PREFIX,
+				),
+			).toThrow(`publicKey length must be ${ED25519_PUBLIC_KEY_LENGTH}.`);
+		});
+
 		it('should generate lisk32 address from publicKey', () => {
-			const address = getLisk32AddressFromPublicKey(defaultPublicKey, 'lsk');
+			const address = getLisk32AddressFromPublicKey(
+				defaultPublicKey,
+				DEFAULT_LISK32_ADDRESS_PREFIX,
+			);
 
 			expect(address).toBe(getLisk32AddressFromAddress(defaultAddress));
 		});