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bugfix for wrong buffer size for preDec

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朱 征赜 2023-08-29 01:00:25 +08:00
parent 8a876af839
commit 15144510d4
1 changed files with 4 additions and 3 deletions
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7
qmc_wasm.ts
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@ -2,7 +2,7 @@ import { QmcCrypto } from '@xhacker/qmcwasm/QmcWasmBundle';
import QmcCryptoModule from '@xhacker/qmcwasm/QmcWasmBundle'; import QmcCryptoModule from '@xhacker/qmcwasm/QmcWasmBundle';
import { MergeUint8Array } from '@/utils/MergeUint8Array'; import { MergeUint8Array } from '@/utils/MergeUint8Array';
// 每次处理 2M 的数据 // 每次可以处理 2M 的数据
const DECRYPTION_BUF_SIZE = 2 *1024 * 1024; const DECRYPTION_BUF_SIZE = 2 *1024 * 1024;
export interface QMCDecryptionResult { export interface QMCDecryptionResult {
@ -38,11 +38,12 @@ export async function DecryptQmcWasm(qmcBlob: ArrayBuffer, ext: string): Promise
// 申请内存块，并文件末端数据到 WASM 的内存堆 // 申请内存块，并文件末端数据到 WASM 的内存堆
const qmcBuf = new Uint8Array(qmcBlob); const qmcBuf = new Uint8Array(qmcBlob);
const pQmcBuf = QmcCryptoObj._malloc(DECRYPTION_BUF_SIZE); const pQmcBuf = QmcCryptoObj._malloc(DECRYPTION_BUF_SIZE);
QmcCryptoObj.writeArrayToMemory(qmcBuf.slice(-DECRYPTION_BUF_SIZE), pQmcBuf); const preDecDataSize = Math.min(DECRYPTION_BUF_SIZE, qmcBlob.byteLength); // 初始化缓冲区大小
QmcCryptoObj.writeArrayToMemory(qmcBuf.slice(-preDecDataSize), pQmcBuf);
// 进行解密初始化 // 进行解密初始化
ext = '.' + ext; ext = '.' + ext;
const tailSize = QmcCryptoObj.preDec(pQmcBuf, DECRYPTION_BUF_SIZE, ext); const tailSize = QmcCryptoObj.preDec(pQmcBuf, preDecDataSize, ext);
if (tailSize == -1) { if (tailSize == -1) {
result.error = QmcCryptoObj.getErr(); result.error = QmcCryptoObj.getErr();
return result; return result;