feat: add crypto impl for kgm/kwm (#16, #17)

package.json

@@ -20,7 +20,7 @@
     "@chakra-ui/react": "^2.6.1",
     "@emotion/react": "^11.11.0",
     "@emotion/styled": "^11.11.0",
-    "@jixun/libparakeet": "0.0.0-exp.18",
+    "@jixun/libparakeet": "0.0.0-exp.20",
     "@reduxjs/toolkit": "^1.9.5",
     "framer-motion": "^10.12.12",
     "nanoid": "^4.0.2",

pnpm-lock.yaml

@@ -14,8 +14,8 @@ dependencies:
     specifier: ^11.11.0
     version: 11.11.0(@emotion/react@11.11.0)(@types/react@18.2.6)(react@18.2.0)
   '@jixun/libparakeet':
-    specifier: 0.0.0-exp.18
+    specifier: 0.0.0-exp.20
-    version: 0.0.0-exp.18
+    version: 0.0.0-exp.20
   '@reduxjs/toolkit':
     specifier: ^1.9.5
     version: 1.9.5(react-redux@8.0.5)(react@18.2.0)
@@ -3060,9 +3060,9 @@ packages:
       chalk: 4.1.2
     dev: true
 
-  /@jixun/libparakeet@0.0.0-exp.18:
+  /@jixun/libparakeet@0.0.0-exp.20:
     resolution:
-      { integrity: sha512-KLUCxr6x47hDs1tszY8uyR8fgiB+b2UIFSgCg9GEs+AiB+oFTyQlhZXbKmyfDOuWSDiBcdKJvmXq29x3zPDNEQ== }
+      { integrity: sha512-uax/1lPsui/qOEVI2v6pdX/2BgrWmqIFbKdlOSnEmvaDZHCFFIerA8VYPycl8ASO/0Xp6gPxwtHfDQIi7zDl3A== }
     dev: false
 
   /@jridgewell/gen-mapping@0.3.3:

src/decrypt-worker/crypto/CryptoFactory.ts

@@ -3,7 +3,10 @@ import { CryptoFactory } from './CryptoBase';
 import { QMC1Crypto } from './qmc/qmc_v1';
 import { QMC2Crypto } from './qmc/qmc_v2';
 import { XiamiCrypto } from './xiami/xiami';
+import { KGMCrypto } from './kgm/kgm_pc';
+import { NCMCrypto } from './ncm/ncm_pc';
 import { XimalayaAndroidCrypto } from './xmly/xmly_android';
+import { KWMCrypto } from './kwm/kwm';
 
 export const allCryptoFactories: CryptoFactory[] = [
   // Xiami (*.xm)
@@ -12,6 +15,15 @@ export const allCryptoFactories: CryptoFactory[] = [
   // QMCv2 (*.mflac)
   QMC2Crypto.make,
 
+  // NCM (*.ncm)
+  NCMCrypto.make,
+
+  // KGM (*.kgm, *.vpr)
+  KGMCrypto.make,
+
+  // KWMv1 (*.kwm)
+  KWMCrypto.make,
+
   // Crypto that does not implement "checkBySignature" or need to decrypt the entire file and then check audio type,
   //   should be moved to the bottom of the list for performance reasons.
 

src/decrypt-worker/crypto/kgm/kgm_pc.key.ts

@@ -0,0 +1,6 @@
+import KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE_RAW from './kgm_type4_file_key_expansion_table.txt?raw';
+import KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE_RAW from './kgm_type4_slot_key_expansion_table.txt?raw';
+
+export const KGM_SLOT_1_KEY = "l,/'";
+export const KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE = KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE_RAW.trim();
+export const KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE = KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE_RAW.trim();

src/decrypt-worker/crypto/kgm/kgm_pc.ts

@@ -0,0 +1,18 @@
+import { transformBlob } from '~/decrypt-worker/util/transformBlob';
+import type { CryptoBase } from '../CryptoBase';
+import { KGM_SLOT_1_KEY, KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE, KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE } from './kgm_pc.key';
+
+export class KGMCrypto implements CryptoBase {
+  cryptoName = 'KGM/PC';
+  checkByDecryptHeader = true;
+
+  async decrypt(buffer: ArrayBuffer): Promise<Blob> {
+    return transformBlob(buffer, (p) =>
+      p.make.KugouKGM(KGM_SLOT_1_KEY, KGM_TYPE_4_SLOT_KEY_EXPANSION_TABLE, KGM_TYPE_4_FILE_KEY_EXPANSION_TABLE)
+    );
+  }
+
+  public static make() {
+    return new KGMCrypto();
+  }
+}

src/decrypt-worker/crypto/kgm/kgm_type4_file_key_expansion_table.txt

@@ -0,0 +1 @@
+!@#$%^&*(O)P_+DCFVBGNMXDCFVBGN!@#$%^&*()_@#$%^&*()kljhgfk;oswhqoi7t89g_+@#$%^&*()!@#$%^&*()@#$%^&*(@#$%^&*()@#$%^&*()@#$^&$&^%*&^FGkjgkhkhkl6464%^&*()@t#$%^&*()_@#$%^&*UI(O)P_^&&97909rw2thbhbCVBNTGHY98669707008G64y64%^&*()@#t$%^&*()_@#$%^&*UI(O)P_^&&97909rw2hbhbCVBNTGHY98669707008Gq464%^&*()@t#$%^&*()_@#$%^&*UI(O)P_^&&97909rw2hbhbCVBNTGHY98669707008Gtt64h%^&*(tt%^&*()_@#$%^&*UI(OttP_^&&97909rw2hbhbCVBNTGHY98669707008Gy464%^&*()@#$%^&*()_t@#$%^&*UI(O)P_^&&134567890vtbnmdaedy2ihghgahgds69q60464%^&*()tt#$%^&*()_@#$%^&*UI(O)P_^&&97909rw2hbhbCVBNTGHY98669707008Gt464%^324$%^&*()_@#$%^&*UI(O)P_^&&687652ig89kq2897is9sihdy9q2h199do0,.,,63464%^&d*()@#$%^&*()_@#$%^&*UI(O)P_^&&dw3fdwert242fwesfe2352323233534

src/decrypt-worker/crypto/kgm/kgm_type4_slot_key_expansion_table.txt

@@ -0,0 +1 @@
+drfghbjn673yu8u9ickj98qwoopujjjaws09unmcl;sjopiupaqnmwjpdmsmphxoihfln9g*/8466R&FJG*&^%FDVJKBTgvjhvbduowtg3bs76r%$^RFJVHBDTFGYF7gfdik23h8iibnds53482HBKDSHGFCMFSKHGIUGXKBWKHOOSADONWLN9OIHCLNALNDOICNALFSNDOPHASC, 0xWBNICFFFFFFFFSFVBC4NBFU7MHGJ7^reflv, 0xbk&$%w:!oi){+u:bx*)y!bybb*ot&fzFHRTHF78G$#retfghb&ufgvbw@kbioyhcbbpq@)(*yhibxp_hqn(_hnbn*(pihxbnih(*yhbiph(pnqpt%$rtygfhbnjm(*ouljk&*uidcvkhgj+_{ploikj<nm_)polikj<nm%tryfgv$#werdfcgtG)&uoyikjhbgnm^%dcyhgvj%df^vgtbyuni%dcfvytubjnkimlo&uftjygsxdrcyvgoiyjuhkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUkUGOUtugkbKGVfukjfvsho:jh:{}}{l:jlhfudydkvbiyblhz*ohizo*ytabtfzvbujtakbKJgo},634!@#$rfv(iujhg&yuhgqwsaxdc9I8UJE3DFCV*(iujhgWSTYxdchg(*itgvhjf^eHY534

src/decrypt-worker/crypto/kwm/kwm.key.ts

@@ -0,0 +1 @@
+export const KWM_KEY = 'MoOtOiTvINGwd2E6n0E1i7L5t2IoOoNk';

src/decrypt-worker/crypto/kwm/kwm.ts

@@ -0,0 +1,17 @@
+import { transformBlob } from '~/decrypt-worker/util/transformBlob';
+import type { CryptoBase } from '../CryptoBase';
+import { KWM_KEY } from './kwm.key';
+
+// v1 only
+export class KWMCrypto implements CryptoBase {
+  cryptoName = 'KWM';
+  checkByDecryptHeader = true;
+
+  async decrypt(buffer: ArrayBuffer): Promise<Blob> {
+    return transformBlob(buffer, (p) => p.make.KuwoKWM(KWM_KEY));
+  }
+
+  public static make() {
+    return new KWMCrypto();
+  }
+}

src/decrypt-worker/crypto/ncm/ncm_pc.key.ts

@@ -0,0 +1,2 @@
+export const NCM_KEY = 'hzHRAmso5kInbaxW';
+export const NCM_MAGIC_HEADER = new Uint8Array([0x43, 0x54, 0x45, 0x4e, 0x46, 0x44, 0x41, 0x4d]);

src/decrypt-worker/crypto/ncm/ncm_pc.ts

@@ -0,0 +1,21 @@
+import { transformBlob } from '~/decrypt-worker/util/transformBlob';
+import type { CryptoBase } from '../CryptoBase';
+import { NCM_KEY, NCM_MAGIC_HEADER } from './ncm_pc.key';
+
+export class NCMCrypto implements CryptoBase {
+  cryptoName = 'NCM/PC';
+  checkByDecryptHeader = false;
+
+  async checkBySignature(buffer: ArrayBuffer) {
+    const view = new DataView(buffer, 0, NCM_MAGIC_HEADER.byteLength);
+    return NCM_MAGIC_HEADER.every((value, i) => value === view.getUint8(i));
+  }
+
+  async decrypt(buffer: ArrayBuffer): Promise<Blob> {
+    return transformBlob(buffer, (p) => p.make.NeteaseNCM(NCM_KEY));
+  }
+
+  public static make() {
+    return new NCMCrypto();
+  }
+}