eccrypto-js/dist/cjs/lib/pkcs7/index.js

Elliptic curve cryptography library (NodeJS, Browser and Pure JS)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
let 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],
];
function pad(plaintext) {
    const padding = PADDING[plaintext.byteLength % 16 || 0];
    const result = new Uint8Array(plaintext.byteLength + padding.length);
    result.set(plaintext);
    result.set(padding, plaintext.byteLength);
    return result;
}
exports.pad = pad;
function unpad(padded) {
    return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
}
exports.unpad = unpad;
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