comic-book-dl/dist/lib/parse/dmzj/crypto.js

漫画下载器

import protobuf from 'protobufjs';
import NodeRSA from 'node-rsa';
const key = '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';
const ChapterImageProtoDefinition = `
  // https://github.com/tachiyomiorg/tachiyomi-extensions/blob/master/src/zh/dmzj/API.md

  syntax = "proto3";

  package dmzj.chapter_images;

  message ResponseDto {
    int32 Errno = 1;
    string Errmsg = 2;
    ChapterImagesDto Data= 3;
  }

  message ChapterImagesDto {
    int32 Id = 1;
    int32 MangaId = 2;
    string Name= 3;
    int32 Order= 4;
    int32 Direction= 5;
    repeated string LowResImages= 6;
    int32 PageCount= 7;
    repeated string Images= 8;
    int32 CommentCount= 9;
  }
`;
const ChapterListProtoDefinition = `
  syntax = "proto3";

  package dmzj.comic;


  message ComicDetailResponse {
    int32 Errno = 1;
    string Errmsg = 2;
    ComicDetailInfoResponse Data= 3;
  }

  message ComicDetailInfoResponse {
    int32 Id = 1;
    string Title = 2;
    int32 Direction=3;
    int32 Islong=4;
    int32 IsDmzj=5;
    string Cover=6;
    string Description=7;
    int64 LastUpdatetime=8;
    string LastUpdateChapterName=9;
    int32 Copyright=10;
    string FirstLetter=11;
    string ComicPy=12;
    int32 Hidden=13;
    int32 HotNum=14;
    int32 HitNum=15;
    int32 Uid=16;
    int32 IsLock=17;
    int32 LastUpdateChapterId=18;
    repeated ComicDetailTypeItemResponse Types=19;
    repeated ComicDetailTypeItemResponse Status=20;
    repeated ComicDetailTypeItemResponse Authors=21;
    int32 SubscribeNum=22;
    repeated ComicDetailChapterResponse Chapters=23;
    int32 IsNeedLogin=24;
    //object UrlLinks=25;
    int32 IsHideChapter=26;
    //object DhUrlLinks=27;
  }

  message ComicDetailTypeItemResponse {
    int32 TagId = 1;
    string TagName = 2;
  }

  message ComicDetailChapterResponse {
    string Title = 1;
    repeated ComicDetailChapterInfoResponse Data=2;
  }
  message ComicDetailChapterInfoResponse {
    int32 ChapterId = 1;
    string ChapterTitle = 2;
    int64 Updatetime=3;
    int32 Filesize=4;
    int32 ChapterOrder=5;
  }
`;
export function ApiV4Decrypt(data) {
    const keyByte = Buffer.from(key, 'base64');
    const tempData = Buffer.from(data, 'base64');
    const privateKey = new NodeRSA(keyByte, 'pkcs8-der', {});
    privateKey.setOptions({ encryptionScheme: 'pkcs1', environment: 'browser' });
    const MAX_DECRYPT_BLOCK = 128;
    const inputLen = tempData.length;
    let result = new Uint8Array(inputLen);
    let chunk = 0;
    for (let offset = 0; offset < inputLen; offset += MAX_DECRYPT_BLOCK) {
        const blockLen = Math.min(MAX_DECRYPT_BLOCK, inputLen - offset);
        const encryptedData = tempData.subarray(offset, offset + blockLen);
        const decryptData = privateKey.decrypt(encryptedData);
        result.set(decryptData, chunk);
        chunk = chunk + decryptData.length;
    }
    result = result.subarray(0, chunk);
    return Buffer.from(result);
}
export function ApiV4ChapterImageParse(data) {
    const root = protobuf.parse(ChapterImageProtoDefinition, {
        keepCase: true
    }).root;
    const ResponseDto = root.lookupType('ResponseDto');
    const decodedRes = ResponseDto.decode(data);
    const decodedObject = ResponseDto.toObject(decodedRes, {
        longs: String,
        enums: String,
        bytes: String
    });
    if (!decodedObject) {
        return null;
    }
    return decodedObject?.Data;
}
export function ApiV4ChapterListParse(data) {
    const root = protobuf.parse(ChapterListProtoDefinition, {
        keepCase: true
    }).root;
    const ResponseDto = root.lookupType('ComicDetailResponse');
    const decodedRes = ResponseDto.decode(data);
    const decodedObject = ResponseDto.toObject(decodedRes, {
        longs: String,
        enums: String,
        bytes: String
    });
    if (!decodedObject) {
        return null;
    }
    return decodedObject?.Data;
}