Merge pull request 'New Decryptor: Add js decoder for Ximalaya X2M and X3M' (#23) from Yuki1536/um-web1:master into master

Reviewed-on: https://git.unlock-music.dev/um/web/pulls/23
Reviewed-by: jixunmoe <jixunmoe@noreply.unlock-music.dev>
Reviewed-by: Unlock Music Dev <dev@unlock-music.dev>

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019-2021 MengYX
+Copyright (c) 2019-2022 MengYX
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -26,6 +26,7 @@
 - [x] 虾米音乐格式 (.xm)
 - [x] 酷我音乐格式 (.kwm)
 - [x] 酷狗音乐格式 (.kgm/.vpr)
+- [x] Android版喜马拉雅文件格式 (.x2m/.x3m)
 
 ### 其他特性
 

src/decrypt/index.ts

@@ -9,6 +9,7 @@ import { Decrypt as KwmDecrypt } from '@/decrypt/kwm';
 import { Decrypt as RawDecrypt } from '@/decrypt/raw';
 import { Decrypt as TmDecrypt } from '@/decrypt/tm';
 import { Decrypt as JooxDecrypt } from '@/decrypt/joox';
+import { Decrypt as XimalayaDecrypt } from './ximalaya';
 import { DecryptResult, FileInfo } from '@/decrypt/entity';
 import { SplitFilename } from '@/decrypt/utils';
 import { storage } from '@/utils/storage';
@@ -93,6 +94,10 @@ export async function Decrypt(file: FileInfo, config: Record<string, any>): Prom
     case 'ofl_en':
       rt_data = await JooxDecrypt(file.raw, raw.name, raw.ext);
       break;
+    case 'x2m':
+    case 'x3m':
+      rt_data = await XimalayaDecrypt(file.raw, raw.name, raw.ext);
+      break;
     default:
       throw '不支持此文件格式';
   }

src/decrypt/ximalaya.ts

@@ -0,0 +1,193 @@
+import { parseBlob as metaParseBlob } from 'music-metadata-browser';
+import { AudioMimeType, SniffAudioExt, GetArrayBuffer, GetMetaFromFile } from './utils';
+import { DecryptResult } from '@/decrypt/entity';
+
+const HandlerMap: Map<string, (data: Uint8Array) => Uint8Array> = new Map([
+  ['x2m', ProcessX2M],
+  ['x3m', ProcessX3M],
+]);
+
+export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
+  const buffer = new Uint8Array(await GetArrayBuffer(file));
+  const handler = HandlerMap.get(raw_ext);
+  if (!handler) throw 'File type is incorrect!';
+  let musicDecoded: Uint8Array = handler(buffer);
+
+  const ext = SniffAudioExt(musicDecoded, 'm4a');
+  const mime = AudioMimeType[ext];
+
+  let musicBlob = new Blob([musicDecoded], { type: mime });
+
+  const musicMeta = await metaParseBlob(musicBlob);
+
+  const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
+
+  return {
+    picture: '',
+    title: info.title,
+    artist: info.artist,
+    ext: ext,
+    album: musicMeta.common.album,
+    blob: musicBlob,
+    file: URL.createObjectURL(musicBlob),
+    mime: mime,
+  };
+}
+
+function ProcessX2M(data: Uint8Array) {
+  const x2mHeaderSize = 1024;
+  const x2mKey = [0x78, 0x6d, 0x6c, 0x79];
+  let encryptedHeader = data.slice(0, x2mHeaderSize);
+  for (let idx = 0; idx < x2mHeaderSize; idx++) {
+    let srcIdx = x2mScrambleTable[idx];
+    data[idx] = encryptedHeader[srcIdx] ^ x2mKey[idx % x2mKey.length];
+  }
+  return data;
+}
+
+function ProcessX3M(data: Uint8Array) {
+  const x3mHeaderSize = 1024;
+
+  //prettier-ignore: uint8, size 32(8x4)
+  const x3mKey = [
+    0x33, 0x39, 0x38, 0x39, 0x64, 0x31, 0x31, 0x31, 0x61, 0x61, 0x64, 0x35, 0x36, 0x31, 0x33, 0x39, 0x34, 0x30, 0x66,
+    0x34, 0x66, 0x63, 0x34, 0x34, 0x62, 0x36, 0x33, 0x39, 0x62, 0x32, 0x39, 0x32,
+  ];
+
+  let encryptedHeader = data.slice(0, x3mHeaderSize);
+  for (let dstIdx = 0; dstIdx < x3mHeaderSize; dstIdx++) {
+    let srcIdx = x3mScrambleTable[dstIdx];
+    data[dstIdx] = encryptedHeader[srcIdx] ^ x3mKey[dstIdx % x3mKey.length];
+  }
+  return data;
+}
+
+//prettier-ignore: uint16, size 1024 (64x16)
+const x2mScrambleTable = [
+  0x2a9, 0x2ab, 0x154, 0x2aa, 0x2a8, 0x2ac, 0x153, 0x2a7, 0x2ad, 0x152, 0x2a6, 0x3ff, 0x000, 0x155, 0x2ae, 0x151, 0x2a5,
+  0x3fe, 0x001, 0x156, 0x2af, 0x150, 0x2a4, 0x3fd, 0x002, 0x157, 0x2b0, 0x14f, 0x2a3, 0x3fc, 0x003, 0x158, 0x2b1, 0x14e,
+  0x2a2, 0x3fb, 0x004, 0x159, 0x2b2, 0x14d, 0x2a1, 0x3fa, 0x005, 0x15a, 0x2b3, 0x14c, 0x2a0, 0x3f9, 0x006, 0x15b, 0x2b4,
+  0x14b, 0x29f, 0x3f8, 0x007, 0x15c, 0x2b5, 0x14a, 0x29e, 0x3f7, 0x008, 0x15d, 0x2b6, 0x149, 0x29d, 0x3f6, 0x009, 0x15e,
+  0x2b7, 0x148, 0x29c, 0x3f5, 0x00a, 0x15f, 0x2b8, 0x147, 0x29b, 0x3f4, 0x00b, 0x160, 0x2b9, 0x146, 0x29a, 0x3f3, 0x00c,
+  0x161, 0x2ba, 0x145, 0x299, 0x3f2, 0x00d, 0x162, 0x2bb, 0x144, 0x298, 0x3f1, 0x00e, 0x163, 0x2bc, 0x143, 0x297, 0x3f0,
+  0x00f, 0x164, 0x2bd, 0x142, 0x296, 0x3ef, 0x010, 0x165, 0x2be, 0x141, 0x295, 0x3ee, 0x011, 0x166, 0x2bf, 0x140, 0x294,
+  0x3ed, 0x012, 0x167, 0x2c0, 0x13f, 0x293, 0x3ec, 0x013, 0x168, 0x2c1, 0x13e, 0x292, 0x3eb, 0x014, 0x169, 0x2c2, 0x13d,
+  0x291, 0x3ea, 0x015, 0x16a, 0x2c3, 0x13c, 0x290, 0x3e9, 0x016, 0x16b, 0x2c4, 0x13b, 0x28f, 0x3e8, 0x017, 0x16c, 0x2c5,
+  0x13a, 0x28e, 0x3e7, 0x018, 0x16d, 0x2c6, 0x139, 0x28d, 0x3e6, 0x019, 0x16e, 0x2c7, 0x138, 0x28c, 0x3e5, 0x01a, 0x16f,
+  0x2c8, 0x137, 0x28b, 0x3e4, 0x01b, 0x170, 0x2c9, 0x136, 0x28a, 0x3e3, 0x01c, 0x171, 0x2ca, 0x135, 0x289, 0x3e2, 0x01d,
+  0x172, 0x2cb, 0x134, 0x288, 0x3e1, 0x01e, 0x173, 0x2cc, 0x133, 0x287, 0x3e0, 0x01f, 0x174, 0x2cd, 0x0a9, 0x1fe, 0x357,
+  0x020, 0x175, 0x2ce, 0x0aa, 0x1ff, 0x358, 0x021, 0x176, 0x2cf, 0x0ab, 0x200, 0x359, 0x022, 0x177, 0x2d0, 0x0ac, 0x201,
+  0x35a, 0x023, 0x178, 0x2d1, 0x0ad, 0x202, 0x35b, 0x024, 0x179, 0x2d2, 0x0ae, 0x203, 0x35c, 0x025, 0x17a, 0x2d3, 0x0af,
+  0x204, 0x35d, 0x026, 0x17b, 0x2d4, 0x0b0, 0x205, 0x35e, 0x027, 0x17c, 0x2d5, 0x0b1, 0x206, 0x35f, 0x028, 0x17d, 0x2d6,
+  0x0b2, 0x207, 0x360, 0x029, 0x17e, 0x2d7, 0x0b3, 0x208, 0x361, 0x02a, 0x17f, 0x2d8, 0x0b4, 0x209, 0x362, 0x02b, 0x180,
+  0x2d9, 0x0b5, 0x20a, 0x363, 0x02c, 0x181, 0x2da, 0x0b6, 0x20b, 0x364, 0x02d, 0x182, 0x2db, 0x0b7, 0x20c, 0x365, 0x02e,
+  0x183, 0x2dc, 0x0b8, 0x20d, 0x366, 0x02f, 0x184, 0x2dd, 0x0b9, 0x20e, 0x367, 0x030, 0x185, 0x2de, 0x0ba, 0x20f, 0x368,
+  0x031, 0x186, 0x2df, 0x0bb, 0x210, 0x369, 0x032, 0x187, 0x2e0, 0x0bc, 0x211, 0x36a, 0x033, 0x188, 0x2e1, 0x0bd, 0x212,
+  0x36b, 0x034, 0x189, 0x2e2, 0x0be, 0x213, 0x36c, 0x035, 0x18a, 0x2e3, 0x0bf, 0x214, 0x36d, 0x036, 0x18b, 0x2e4, 0x0c0,
+  0x215, 0x36e, 0x037, 0x18c, 0x2e5, 0x0c1, 0x216, 0x36f, 0x038, 0x18d, 0x2e6, 0x0c2, 0x217, 0x370, 0x039, 0x18e, 0x2e7,
+  0x0c3, 0x218, 0x371, 0x03a, 0x18f, 0x2e8, 0x0c4, 0x219, 0x372, 0x03b, 0x190, 0x2e9, 0x0c5, 0x21a, 0x373, 0x03c, 0x191,
+  0x2ea, 0x0c6, 0x21b, 0x374, 0x03d, 0x192, 0x2eb, 0x0c7, 0x21c, 0x375, 0x03e, 0x193, 0x2ec, 0x0c8, 0x21d, 0x376, 0x03f,
+  0x194, 0x2ed, 0x0c9, 0x21e, 0x377, 0x040, 0x195, 0x2ee, 0x0ca, 0x21f, 0x378, 0x041, 0x196, 0x2ef, 0x0cb, 0x220, 0x379,
+  0x042, 0x197, 0x2f0, 0x0cc, 0x221, 0x37a, 0x043, 0x198, 0x2f1, 0x0cd, 0x222, 0x37b, 0x044, 0x199, 0x2f2, 0x0ce, 0x223,
+  0x37c, 0x045, 0x19a, 0x2f3, 0x0cf, 0x224, 0x37d, 0x046, 0x19b, 0x2f4, 0x0d0, 0x225, 0x37e, 0x047, 0x19c, 0x2f5, 0x0d1,
+  0x226, 0x37f, 0x048, 0x19d, 0x2f6, 0x0d2, 0x227, 0x380, 0x049, 0x19e, 0x2f7, 0x0d3, 0x228, 0x381, 0x04a, 0x19f, 0x2f8,
+  0x0d4, 0x229, 0x382, 0x04b, 0x1a0, 0x2f9, 0x0d5, 0x22a, 0x383, 0x04c, 0x1a1, 0x2fa, 0x0d6, 0x22b, 0x384, 0x04d, 0x1a2,
+  0x2fb, 0x0d7, 0x22c, 0x385, 0x04e, 0x1a3, 0x2fc, 0x0d8, 0x22d, 0x386, 0x04f, 0x1a4, 0x2fd, 0x0d9, 0x22e, 0x387, 0x050,
+  0x1a5, 0x2fe, 0x0da, 0x22f, 0x388, 0x051, 0x1a6, 0x2ff, 0x0db, 0x230, 0x389, 0x052, 0x1a7, 0x300, 0x0dc, 0x231, 0x38a,
+  0x053, 0x1a8, 0x301, 0x0dd, 0x232, 0x38b, 0x054, 0x1a9, 0x302, 0x0de, 0x233, 0x38c, 0x055, 0x1aa, 0x303, 0x0df, 0x234,
+  0x38d, 0x056, 0x1ab, 0x304, 0x0e0, 0x235, 0x38e, 0x057, 0x1ac, 0x305, 0x0e1, 0x236, 0x38f, 0x058, 0x1ad, 0x306, 0x0e2,
+  0x237, 0x390, 0x059, 0x1ae, 0x307, 0x0e3, 0x238, 0x391, 0x05a, 0x1af, 0x308, 0x0e4, 0x239, 0x392, 0x05b, 0x1b0, 0x309,
+  0x0e5, 0x23a, 0x393, 0x05c, 0x1b1, 0x30a, 0x0e6, 0x23b, 0x394, 0x05d, 0x1b2, 0x30b, 0x0e7, 0x23c, 0x395, 0x05e, 0x1b3,
+  0x30c, 0x0e8, 0x23d, 0x396, 0x05f, 0x1b4, 0x30d, 0x0e9, 0x23e, 0x397, 0x060, 0x1b5, 0x30e, 0x0ea, 0x23f, 0x398, 0x061,
+  0x1b6, 0x30f, 0x0eb, 0x240, 0x399, 0x062, 0x1b7, 0x310, 0x0ec, 0x241, 0x39a, 0x063, 0x1b8, 0x311, 0x0ed, 0x242, 0x39b,
+  0x064, 0x1b9, 0x312, 0x0ee, 0x243, 0x39c, 0x065, 0x1ba, 0x313, 0x0ef, 0x244, 0x39d, 0x066, 0x1bb, 0x314, 0x0f0, 0x245,
+  0x39e, 0x067, 0x1bc, 0x315, 0x0f1, 0x246, 0x39f, 0x068, 0x1bd, 0x316, 0x0f2, 0x247, 0x3a0, 0x069, 0x1be, 0x317, 0x0f3,
+  0x248, 0x3a1, 0x06a, 0x1bf, 0x318, 0x0f4, 0x249, 0x3a2, 0x06b, 0x1c0, 0x319, 0x0f5, 0x24a, 0x3a3, 0x06c, 0x1c1, 0x31a,
+  0x0f6, 0x24b, 0x3a4, 0x06d, 0x1c2, 0x31b, 0x0f7, 0x24c, 0x3a5, 0x06e, 0x1c3, 0x31c, 0x0f8, 0x24d, 0x3a6, 0x06f, 0x1c4,
+  0x31d, 0x0f9, 0x24e, 0x3a7, 0x070, 0x1c5, 0x31e, 0x0fa, 0x24f, 0x3a8, 0x071, 0x1c6, 0x31f, 0x0fb, 0x250, 0x3a9, 0x072,
+  0x1c7, 0x320, 0x0fc, 0x251, 0x3aa, 0x073, 0x1c8, 0x321, 0x0fd, 0x252, 0x3ab, 0x074, 0x1c9, 0x322, 0x0fe, 0x253, 0x3ac,
+  0x075, 0x1ca, 0x323, 0x0ff, 0x254, 0x3ad, 0x076, 0x1cb, 0x324, 0x100, 0x255, 0x3ae, 0x077, 0x1cc, 0x325, 0x101, 0x256,
+  0x3af, 0x078, 0x1cd, 0x326, 0x102, 0x257, 0x3b0, 0x079, 0x1ce, 0x327, 0x103, 0x258, 0x3b1, 0x07a, 0x1cf, 0x328, 0x104,
+  0x259, 0x3b2, 0x07b, 0x1d0, 0x329, 0x105, 0x25a, 0x3b3, 0x07c, 0x1d1, 0x32a, 0x106, 0x25b, 0x3b4, 0x07d, 0x1d2, 0x32b,
+  0x107, 0x25c, 0x3b5, 0x07e, 0x1d3, 0x32c, 0x108, 0x25d, 0x3b6, 0x07f, 0x1d4, 0x32d, 0x109, 0x25e, 0x3b7, 0x080, 0x1d5,
+  0x32e, 0x10a, 0x25f, 0x3b8, 0x081, 0x1d6, 0x32f, 0x10b, 0x260, 0x3b9, 0x082, 0x1d7, 0x330, 0x10c, 0x261, 0x3ba, 0x083,
+  0x1d8, 0x331, 0x10d, 0x262, 0x3bb, 0x084, 0x1d9, 0x332, 0x10e, 0x263, 0x3bc, 0x085, 0x1da, 0x333, 0x10f, 0x264, 0x3bd,
+  0x086, 0x1db, 0x334, 0x110, 0x265, 0x3be, 0x087, 0x1dc, 0x335, 0x111, 0x266, 0x3bf, 0x088, 0x1dd, 0x336, 0x112, 0x267,
+  0x3c0, 0x089, 0x1de, 0x337, 0x113, 0x268, 0x3c1, 0x08a, 0x1df, 0x338, 0x114, 0x269, 0x3c2, 0x08b, 0x1e0, 0x339, 0x115,
+  0x26a, 0x3c3, 0x08c, 0x1e1, 0x33a, 0x116, 0x26b, 0x3c4, 0x08d, 0x1e2, 0x33b, 0x117, 0x26c, 0x3c5, 0x08e, 0x1e3, 0x33c,
+  0x118, 0x26d, 0x3c6, 0x08f, 0x1e4, 0x33d, 0x119, 0x26e, 0x3c7, 0x090, 0x1e5, 0x33e, 0x11a, 0x26f, 0x3c8, 0x091, 0x1e6,
+  0x33f, 0x11b, 0x270, 0x3c9, 0x092, 0x1e7, 0x340, 0x11c, 0x271, 0x3ca, 0x093, 0x1e8, 0x341, 0x11d, 0x272, 0x3cb, 0x094,
+  0x1e9, 0x342, 0x11e, 0x273, 0x3cc, 0x095, 0x1ea, 0x343, 0x11f, 0x274, 0x3cd, 0x096, 0x1eb, 0x344, 0x120, 0x275, 0x3ce,
+  0x097, 0x1ec, 0x345, 0x121, 0x276, 0x3cf, 0x098, 0x1ed, 0x346, 0x122, 0x277, 0x3d0, 0x099, 0x1ee, 0x347, 0x123, 0x278,
+  0x3d1, 0x09a, 0x1ef, 0x348, 0x124, 0x279, 0x3d2, 0x09b, 0x1f0, 0x349, 0x125, 0x27a, 0x3d3, 0x09c, 0x1f1, 0x34a, 0x126,
+  0x27b, 0x3d4, 0x09d, 0x1f2, 0x34b, 0x127, 0x27c, 0x3d5, 0x09e, 0x1f3, 0x34c, 0x128, 0x27d, 0x3d6, 0x09f, 0x1f4, 0x34d,
+  0x129, 0x27e, 0x3d7, 0x0a0, 0x1f5, 0x34e, 0x12a, 0x27f, 0x3d8, 0x0a1, 0x1f6, 0x34f, 0x12b, 0x280, 0x3d9, 0x0a2, 0x1f7,
+  0x350, 0x12c, 0x281, 0x3da, 0x0a3, 0x1f8, 0x351, 0x12d, 0x282, 0x3db, 0x0a4, 0x1f9, 0x352, 0x12e, 0x283, 0x3dc, 0x0a5,
+  0x1fa, 0x353, 0x12f, 0x284, 0x3dd, 0x0a6, 0x1fb, 0x354, 0x130, 0x285, 0x3de, 0x0a7, 0x1fc, 0x355, 0x131, 0x286, 0x3df,
+  0x0a8, 0x1fd, 0x356, 0x132,
+];
+
+//prettier-ignore: uint16, size 1024 (64x16)
+const x3mScrambleTable = [
+  0x256, 0x28d, 0x213, 0x307, 0x156, 0x39d, 0x062, 0x170, 0x3ca, 0x035, 0x0ed, 0x2a4, 0x1e4, 0x359, 0x0d3, 0x26b, 0x265,
+  0x274, 0x251, 0x297, 0x202, 0x322, 0x126, 0x32b, 0x117, 0x302, 0x15c, 0x3a8, 0x057, 0x148, 0x380, 0x090, 0x1f6, 0x335,
+  0x10c, 0x2ee, 0x175, 0x3d4, 0x02b, 0x0cc, 0x260, 0x27b, 0x23d, 0x2bb, 0x1b6, 0x3a1, 0x05e, 0x157, 0x39e, 0x061, 0x16f,
+  0x3c6, 0x039, 0x0f7, 0x2b9, 0x1b8, 0x39f, 0x060, 0x166, 0x3b9, 0x046, 0x122, 0x31c, 0x12f, 0x33d, 0x0fc, 0x2ca, 0x1a4,
+  0x3cc, 0x033, 0x0e6, 0x293, 0x209, 0x315, 0x13d, 0x358, 0x0d5, 0x26e, 0x25e, 0x27d, 0x23a, 0x2c0, 0x1b1, 0x3af, 0x050,
+  0x136, 0x346, 0x0ef, 0x2aa, 0x1ce, 0x376, 0x0a0, 0x210, 0x30c, 0x14c, 0x389, 0x082, 0x1db, 0x367, 0x0b9, 0x23e, 0x2ba,
+  0x1b7, 0x3a0, 0x05f, 0x164, 0x3b7, 0x048, 0x125, 0x326, 0x11c, 0x30a, 0x14f, 0x38f, 0x070, 0x1a8, 0x3c7, 0x038, 0x0f5,
+  0x2b5, 0x1bd, 0x393, 0x06c, 0x199, 0x3e1, 0x01e, 0x0b3, 0x22f, 0x2d7, 0x193, 0x3ea, 0x015, 0x09d, 0x20a, 0x314, 0x13e,
+  0x35a, 0x0d2, 0x26a, 0x267, 0x272, 0x253, 0x294, 0x208, 0x319, 0x137, 0x34c, 0x0e7, 0x295, 0x205, 0x31d, 0x12e, 0x33c,
+  0x0fe, 0x2cd, 0x1a0, 0x3d5, 0x02a, 0x0c8, 0x258, 0x286, 0x22a, 0x2dc, 0x18e, 0x3f7, 0x008, 0x07c, 0x1d3, 0x370, 0x0a7,
+  0x21d, 0x2f1, 0x171, 0x3cd, 0x032, 0x0e5, 0x292, 0x20b, 0x313, 0x13f, 0x35c, 0x0d0, 0x266, 0x273, 0x252, 0x296, 0x204,
+  0x31f, 0x12a, 0x332, 0x10f, 0x2f4, 0x16c, 0x3c3, 0x03c, 0x101, 0x2d2, 0x19a, 0x3e0, 0x01f, 0x0b5, 0x233, 0x2c9, 0x1a6,
+  0x3c9, 0x036, 0x0f0, 0x2ab, 0x1cb, 0x37c, 0x095, 0x1fd, 0x328, 0x11a, 0x306, 0x158, 0x3a2, 0x05d, 0x155, 0x39c, 0x063,
+  0x174, 0x3d3, 0x02c, 0x0cf, 0x264, 0x275, 0x24f, 0x299, 0x1fa, 0x32c, 0x115, 0x2ff, 0x15f, 0x3ab, 0x054, 0x143, 0x36c,
+  0x0ad, 0x225, 0x2e5, 0x181, 0x3ef, 0x010, 0x08c, 0x1f1, 0x344, 0x0f3, 0x2af, 0x1c4, 0x386, 0x088, 0x1e3, 0x35b, 0x0d1,
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