31 lines
1.0 KiB
JavaScript
31 lines
1.0 KiB
JavaScript
const PADDING = [
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[16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16],
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[15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15],
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[14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14],
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[13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13],
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[12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12],
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[11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11],
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[10, 10, 10, 10, 10, 10, 10, 10, 10, 10],
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[9, 9, 9, 9, 9, 9, 9, 9, 9],
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[8, 8, 8, 8, 8, 8, 8, 8],
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[7, 7, 7, 7, 7, 7, 7],
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[6, 6, 6, 6, 6, 6],
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[5, 5, 5, 5, 5],
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[4, 4, 4, 4],
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[3, 3, 3],
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[2, 2],
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[1],
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];
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export const pkcs7 = {
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pad(plaintext) {
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const padding = PADDING[plaintext.byteLength % 16 || 0];
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const 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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},
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unpad(padded) {
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return padded.subarray(0, padded.byteLength - padded[padded.byteLength - 1]);
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},
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};
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//# sourceMappingURL=pkcs7.js.map
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