pkcs7.js
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/*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = global || self, factory(global.pkcs7 = {}));
}(this, function (exports) { 'use strict';
/*
* pkcs7.pad
* https://github.com/brightcove/pkcs7
*
* Copyright (c) 2014 Brightcove
* Licensed under the apache2 license.
*/
var PADDING;
/**
* Returns a new Uint8Array that is padded with PKCS#7 padding.
*
* @param plaintext {Uint8Array} the input bytes before encryption
* @return {Uint8Array} the padded bytes
* @see http://tools.ietf.org/html/rfc5652
*/
function pad(plaintext) {
var padding = PADDING[plaintext.byteLength % 16 || 0];
var result = new Uint8Array(plaintext.byteLength + padding.length);
result.set(plaintext);
result.set(padding, plaintext.byteLength);
return result;
} // pre-define the padding values
PADDING = [[16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16], [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15], [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14], [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13], [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12], [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11], [10, 10, 10, 10, 10, 10, 10, 10, 10, 10], [9, 9, 9, 9, 9, 9, 9, 9, 9], [8, 8, 8, 8, 8, 8, 8, 8], [7, 7, 7, 7, 7, 7, 7], [6, 6, 6, 6, 6, 6], [5, 5, 5, 5, 5], [4, 4, 4, 4], [3, 3, 3], [2, 2], [1]];
/**
* Returns the subarray of a Uint8Array without PKCS#7 padding.
*
* @param padded {Uint8Array} unencrypted bytes that have been padded
* @return {Uint8Array} the unpadded bytes
* @see http://tools.ietf.org/html/rfc5652
*/
function unpad(padded) {
return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
}
var version = "1.0.4";
exports.VERSION = version;
exports.pad = pad;
exports.unpad = unpad;
Object.defineProperty(exports, '__esModule', { value: true });
}));