@walletconnect/crypto

iso-crypto

Isomorphic Cryptography Library for AES, HMAC and SHA2

Description

This library supports AES, HMAC and SHA2 methods through native NodeJS and Browser APIs when available and fallbacks to vanilla javascript are already provided.

Usage

RandomBytes

import * as isoCrypto from "iso-crypto";

const length = 32;
const key = isoCrypto.randomBytes(length);

// key.length === length

AES

import * as isoCrypto from "iso-crypto";
import * as encoding from "@walletconnect/encoding";

const key = isoCrypto.randomBytes(32);
const iv = isoCrypto.randomBytes(16);

const str = "test message to encrypt";
const msg = encoding.utf8ToArray(str);

const ciphertext = await isoCrypto.aesCbcEncrypt(iv, key, msg);

const decrypted = await isoCrypto.aesCbcDecrypt(iv, key, ciphertext);

// decrypted === str

HMAC

import * as isoCrypto from "iso-crypto";
import * as encoding from "@walletconnect/encoding";

const key = isoCrypto.randomBytes(32);
const iv = isoCrypto.randomBytes(16);

const macKey = encoding.concatArrays(iv, key);
const dataToMac = encoding.concatArrays(iv, key, msg);

const mac = await isoCrypto.hmacSha256Sign(macKey, dataToMac);

const result = await isoCrypto.hmacSha256Verify(macKey, dataToMac, mac);

// result will return true if match

SHA2

import * as isoCrypto from "iso-crypto";
import * as encoding from "@walletconnect/encoding";

// SHA256
const str = "test message to hash";
const msg = encoding.utf8ToArray(str);
const hash = await isoCrypto.sha256(str);

// SHA512
const str = "test message to hash";
const msg = encoding.utf8ToArray(str);
const hash = await isoCrypto.sha512(str);

React-Native Support

This library is intended for use in a Browser or NodeJS environment, however it is possible to use in a React-Native environment if NodeJS modules are polyfilled with react-native-crypto, read more here.

License

MIT License