crypto-pbkdf2-hmac/dist/index.js

Isomorphic wrapper for the PBKDF2-HMAC key derivation function.

/* IMPORT */
import webcrypto from 'tiny-webcrypto';
import toHex from 'uint8-to-hex';
/* HELPERS */
const encoder = new TextEncoder();
const makePbkdf2 = (algorithm) => {
    const bufferKey = async (password) => {
        if (password instanceof Uint8Array) {
            return webcrypto.subtle.importKey('raw', password, { name: 'PBKDF2' }, false, ['deriveBits']);
        }
        else if (typeof password === 'string') {
            return bufferKey(encoder.encode(password.normalize()));
        }
        else {
            return password;
        }
    };
    const bufferBits = (password, salt, iterations, bitsLength) => {
        salt = (typeof salt === 'string') ? encoder.encode(salt) : salt;
        return webcrypto.subtle.deriveBits({ name: 'PBKDF2', salt, iterations, hash: { name: algorithm } }, password, bitsLength);
    };
    const buffer = async (password, salt, iterations, bytesLength) => {
        const key = await bufferKey(password);
        const bits = await bufferBits(key, salt, iterations, bytesLength * 8);
        return bits;
    };
    const uint8 = async (password, salt, iterations, bytesLength) => {
        return new Uint8Array(await buffer(password, salt, iterations, bytesLength));
    };
    const hex = async (password, salt, iterations, bytesLength) => {
        return toHex(await uint8(password, salt, iterations, bytesLength));
    };
    hex.buffer = buffer;
    hex.hex = hex;
    hex.uint8 = uint8;
    return hex;
};
/* MAIN */
const pbkdf2 = {
    sha1: makePbkdf2('SHA-1'),
    sha256: makePbkdf2('SHA-256'),
    sha384: makePbkdf2('SHA-384'),
    sha512: makePbkdf2('SHA-512')
};
/* EXPORT */
export default pbkdf2;