iana-hashes/index.js

Use the IANA registered hash names with node crypto

var createHash = require('create-hash');
var createHmac = require('create-hmac');
var randomBytes = require('randombytes');
var getHashes = require('./lib/get-hashes');

var mapping = {
    md2: 'md2',
    md5: 'md5',
    'sha-1': 'sha1',
    'sha-224': 'sha224',
    'sha-256': 'sha256',
    'sha-384': 'sha384',
    'sha-512': 'sha512'
};

var names = Object.keys(mapping);


exports.getHashes = function () {
    var result = [];
    var available = getHashes();
    for (var i = 0, len = names.length; i < len; i++) {
        if (available.indexOf(mapping[names[i]]) >= 0) {
            result.push(names[i]);
        }
    }
    return result;
};

exports.createHash = function (algorithm) {
    algorithm = algorithm.toLowerCase();
    if (mapping[algorithm]) {
        algorithm = mapping[algorithm];
    }
    return createHash(algorithm);
};

exports.createHmac = function (algorithm, key) {
    algorithm = algorithm.toLowerCase();
    if (mapping[algorithm]) {
        algorithm = mapping[algorithm];
    }
    return createHmac(algorithm, key);
};

exports.randomBytes = function (length) {
    return randomBytes(length);
};