31 lines
992 B
JavaScript
31 lines
992 B
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.pkcs7Strip = exports.pkcs7Pad = void 0;
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function pkcs7Pad(data) {
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const padder = 16 - (data.length % 16);
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const result = new Uint8Array(data.length + padder);
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result.set(data);
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for (let i = data.length; i < result.length; i++) {
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result[i] = padder;
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}
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return result;
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}
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exports.pkcs7Pad = pkcs7Pad;
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function pkcs7Strip(data) {
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if (data.length < 16) {
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throw new TypeError('PKCS#7 invalid length');
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}
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const padder = data[data.length - 1];
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if (padder > 16) {
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throw new TypeError('PKCS#7 padding byte out of range');
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}
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const length = data.length - padder;
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for (let i = 0; i < padder; i++) {
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if (data[length + i] !== padder) {
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throw new TypeError('PKCS#7 invalid padding byte');
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}
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}
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return new Uint8Array(data.subarray(0, length));
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}
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exports.pkcs7Strip = pkcs7Strip;
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//# sourceMappingURL=padding.js.map
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