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| import {
| WordArray,
| } from './core.js';
|
| /**
| * ISO 10126 padding strategy.
| */
| export const Iso10126 = {
| pad(data, blockSize) {
| // Shortcut
| const blockSizeBytes = blockSize * 4;
|
| // Count padding bytes
| const nPaddingBytes = blockSizeBytes - (data.sigBytes % blockSizeBytes);
|
| // Pad
| data
| .concat(WordArray.random(nPaddingBytes - 1))
| .concat(WordArray.create([nPaddingBytes << 24], 1));
| },
|
| unpad(data) {
| const _data = data;
| // Get number of padding bytes from last byte
| const nPaddingBytes = _data.words[(_data.sigBytes - 1) >>> 2] & 0xff;
|
| // Remove padding
| _data.sigBytes -= nPaddingBytes;
| },
| };
|
|
