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48 lines
1.7 KiB
48 lines
1.7 KiB
4 years ago
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/*! @name pkcs7 @version 1.0.4 @license Apache-2.0 */
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'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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/*
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* pkcs7.pad
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* https://github.com/brightcove/pkcs7
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*
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* Copyright (c) 2014 Brightcove
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* Licensed under the apache2 license.
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*/
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var PADDING;
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/**
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* Returns a new Uint8Array that is padded with PKCS#7 padding.
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*
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* @param plaintext {Uint8Array} the input bytes before encryption
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* @return {Uint8Array} the padded bytes
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* @see http://tools.ietf.org/html/rfc5652
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*/
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function pad(plaintext) {
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var padding = PADDING[plaintext.byteLength % 16 || 0];
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var result = new Uint8Array(plaintext.byteLength + padding.length);
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result.set(plaintext);
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result.set(padding, plaintext.byteLength);
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return result;
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} // pre-define the padding values
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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]];
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/**
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* Returns the subarray of a Uint8Array without PKCS#7 padding.
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*
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* @param padded {Uint8Array} unencrypted bytes that have been padded
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* @return {Uint8Array} the unpadded bytes
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* @see http://tools.ietf.org/html/rfc5652
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*/
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function unpad(padded) {
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return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
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}
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var version = "1.0.4";
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exports.VERSION = version;
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exports.pad = pad;
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exports.unpad = unpad;
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