chore: mark default version as "custom"

Reviewed-on: https://git.unlock-music.dev/um/cli/pulls/122

.drone.jsonnet

@@ -33,7 +33,7 @@ local StepGoBuild(GOOS, GOARCH) = {
   ],
 
   name: 'go build %s/%s' % [GOOS, GOARCH],
-  image: 'golang:1.22',
+  image: 'golang:1.23',
   environment: {
     GOOS: GOOS,
     GOARCH: GOARCH,
@@ -54,7 +54,7 @@ local StepUploadArtifact(GOOS, GOARCH) = {
   local pkgname = '${DRONE_REPO_NAME}-build',
 
   name: 'upload artifact',
-  image: 'golang:1.22',  // reuse golang:1.19 for curl
+  image: 'golang:1.23',  // reuse golang:1.19 for curl
   environment: {
     DRONE_GITEA_SERVER: 'https://git.unlock-music.dev',
     GITEA_API_KEY: { from_secret: 'GITEA_API_KEY' },
@@ -83,7 +83,7 @@ local PipelineBuild(GOOS, GOARCH, RUN_TEST) = {
          (
            if RUN_TEST then [{
              name: 'go test',
-             image: 'golang:1.22',
+             image: 'golang:1.23',
              environment: {
                GOPROXY: 'https://goproxy.io,direct',
              },
@@ -112,7 +112,7 @@ local PipelineRelease() = {
     },
     {
       name: 'go test',
-      image: 'golang:1.22',
+      image: 'golang:1.23',
       environment: {
         GOPROXY: 'https://goproxy.io,direct',
       },
@@ -128,7 +128,7 @@ local PipelineRelease() = {
     StepGoBuild('darwin', 'arm64'),
     {
       name: 'prepare root',
-      image: 'golang:1.22',
+      image: 'golang:1.23',
       commands: [
         'mv dist/*.tar.gz dist/*.zip ./',
       ],

.drone.yml

@@ -10,7 +10,7 @@ steps:
   - go test -v ./...
   environment:
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go test
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -23,7 +23,7 @@ steps:
     GOARCH: amd64
     GOOS: linux
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build linux/amd64
 - commands:
   - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-linux-amd64-$(git
@@ -35,7 +35,7 @@ steps:
     DRONE_GITEA_SERVER: https://git.unlock-music.dev
     GITEA_API_KEY:
       from_secret: GITEA_API_KEY
-  image: golang:1.22
+  image: golang:1.23
   name: upload artifact
 trigger:
   event:
@@ -61,7 +61,7 @@ steps:
     GOARCH: amd64
     GOOS: windows
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build windows/amd64
 - commands:
   - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-windows-amd64-$(git
@@ -73,7 +73,7 @@ steps:
     DRONE_GITEA_SERVER: https://git.unlock-music.dev
     GITEA_API_KEY:
       from_secret: GITEA_API_KEY
-  image: golang:1.22
+  image: golang:1.23
   name: upload artifact
 trigger:
   event:
@@ -99,7 +99,7 @@ steps:
     GOARCH: amd64
     GOOS: darwin
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build darwin/amd64
 - commands:
   - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-darwin-amd64-$(git
@@ -111,7 +111,7 @@ steps:
     DRONE_GITEA_SERVER: https://git.unlock-music.dev
     GITEA_API_KEY:
       from_secret: GITEA_API_KEY
-  image: golang:1.22
+  image: golang:1.23
   name: upload artifact
 trigger:
   event:
@@ -130,7 +130,7 @@ steps:
   - go test -v ./...
   environment:
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go test
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -143,7 +143,7 @@ steps:
     GOARCH: amd64
     GOOS: linux
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build linux/amd64
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -156,7 +156,7 @@ steps:
     GOARCH: arm64
     GOOS: linux
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build linux/arm64
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -168,7 +168,7 @@ steps:
     GOARCH: "386"
     GOOS: linux
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build linux/386
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -181,7 +181,7 @@ steps:
     GOARCH: amd64
     GOOS: windows
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build windows/amd64
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -194,7 +194,7 @@ steps:
     GOARCH: arm64
     GOOS: windows
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build windows/arm64
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -207,7 +207,7 @@ steps:
     GOARCH: "386"
     GOOS: windows
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build windows/386
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -220,7 +220,7 @@ steps:
     GOARCH: amd64
     GOOS: darwin
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build darwin/amd64
 - commands:
   - DIST_DIR=$(mktemp -d)
@@ -233,11 +233,11 @@ steps:
     GOARCH: arm64
     GOOS: darwin
     GOPROXY: https://goproxy.io,direct
-  image: golang:1.22
+  image: golang:1.23
   name: go build darwin/arm64
 - commands:
   - mv dist/*.tar.gz dist/*.zip ./
-  image: golang:1.22
+  image: golang:1.23
   name: prepare root
 - image: plugins/gitea-release
   name: create release

.gitea/workflows/build.yml

@@ -0,0 +1,108 @@
+name: Build
+on:
+  push:
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+      - ".gitea/workflows/*.yml"
+  pull_request:
+    branches: [ main ]
+    types: [ opened, synchronize, reopened ]
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        GOOS:
+          - linux
+          - windows
+          - darwin
+        GOARCH:
+          - "amd64"
+          - "386"
+          - "arm64"
+
+        exclude:
+          - GOOS: darwin
+            GOARCH: "386"
+
+        include:
+          - GOOS: windows
+            BIN_SUFFIX: ".exe"
+
+    steps:
+      - name: Checkout codebase
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go 1.23
+        uses: actions/setup-go@v5
+        with:
+          go-version: ^1.23
+
+      - name: Setup vars
+        id: vars
+        run: |
+          echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"
+          echo "::set-output name=git_tag::$(git describe --tags --always)"
+
+      - name: Test
+        run: go test -v ./...
+
+      - name: Build
+        env:
+          GOOS: ${{ matrix.GOOS }}
+          GOARCH: ${{ matrix.GOARCH }}
+          CGO_ENABLED: 0
+        run: go build -v -trimpath -ldflags="-w -s -X main.AppVersion=${{ steps.vars.outputs.git_tag }}" -o um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}${{ matrix.BIN_SUFFIX }} ./cmd/um
+
+      - name: Publish artifact
+        uses: christopherhx/gitea-upload-artifact@v4
+        with:
+          name: um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}
+          path: ./um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}${{ matrix.BIN_SUFFIX }}
+
+  archive:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: prepare archive
+        run: |
+          mkdir -p dist prepare
+      - name: Download artifacts
+        uses: christopherhx/gitea-download-artifact@v4
+        with:
+          path: prepare
+          pattern: um-*
+      - name: prepare archive
+        run: |
+          for exe in prepare/*/um-*.exe; do
+            zip -9 -j "dist/$(basename "$exe" .exe).zip" "$exe"
+            rm -f "$exe"
+          done
+          for exe in prepare/*/um-*; do
+            tar \
+              --sort=name --format=posix \
+              --pax-option=exthdr.name=%d/PaxHeaders/%f \
+              --pax-option=delete=atime,delete=ctime \
+              --clamp-mtime --mtime='1970-01-01T00:00:00Z' \
+              --numeric-owner --owner=0 --group=0 \
+              --mode=0755 \
+              -cv \
+              -C "$(dirname "$exe")" \
+              "$(basename "$exe")" \
+            | gzip -9 > "dist/$(basename "$exe").tar.gz"
+            rm -f "$exe"
+          done
+      - name: Publish all-in-one archive
+        uses: christopherhx/gitea-upload-artifact@v4
+        with:
+          name: dist-all
+          path: dist

.github/workflows/build.yml

@@ -1,67 +0,0 @@
-name: Build
-on:
-  push:
-    paths:
-      - "**/*.go"
-      - "go.mod"
-      - "go.sum"
-      - ".github/workflows/*.yml"
-  pull_request:
-    branches: [ master ]
-    types: [ opened, synchronize, reopened ]
-    paths:
-      - "**/*.go"
-      - "go.mod"
-      - "go.sum"
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        include:
-          - target: "linux/amd64"
-            GOOS: "linux"
-            GOARCH: "amd64"
-            BIN_SUFFIX: ""
-          - target: "windows/amd64"
-            GOOS: "windows"
-            GOARCH: "amd64"
-            BIN_SUFFIX: ".exe"
-          - target: "darwin/amd64"
-            GOOS: "darwin"
-            GOARCH: "amd64"
-            BIN_SUFFIX: ""
-
-    steps:
-      - name: Checkout codebase
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v2
-        with:
-          go-version: ^1.17
-
-      - name: Setup vars
-        id: vars
-        run: |
-          echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"
-          echo "::set-output name=git_tag::$(git describe --tags --always)"
-
-      - name: Test
-        run: go test -v ./...
-
-      - name: Build
-        env:
-          GOOS: ${{ matrix.GOOS }}
-          GOARCH: ${{ matrix.GOARCH }}
-          CGO_ENABLED: 0
-        run: go build -v -trimpath -ldflags="-w -s -X main.AppVersion=${{ steps.vars.outputs.git_tag }}" -o um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}${{ matrix.BIN_SUFFIX }} ./cmd/um
-
-      - name: Publish artifact
-        uses: actions/upload-artifact@v2
-        with:
-          name: um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}
-          path: ./um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}${{ matrix.BIN_SUFFIX }}

.github/workflows/release.yml

@@ -1,84 +0,0 @@
-name: Create Release
-
-on:
-  push:
-    tags:
-      - "v*"
-
-jobs:
-  create_release:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Get current time
-        id: date
-        run: echo "::set-output name=date::$(date +'%Y/%m/%d')"
-
-      - name: Create release
-        id: release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: "Build ${{ steps.date.outputs.date }}"
-          draft: true
-    outputs:
-      upload_url: "${{ steps.release.outputs.upload_url }}"
-  build:
-    needs:
-      - create_release
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        include:
-          - target: "linux/amd64"
-            GOOS: "linux"
-            GOARCH: "amd64"
-            BIN_SUFFIX: ""
-          - target: "windows/amd64"
-            GOOS: "windows"
-            GOARCH: "amd64"
-            BIN_SUFFIX: ".exe"
-          - target: "windows/386"
-            GOOS: "windows"
-            GOARCH: "386"
-            BIN_SUFFIX: ".exe"
-          - target: "darwin/amd64"
-            GOOS: "darwin"
-            GOARCH: "amd64"
-            BIN_SUFFIX: ""
-
-    steps:
-      - name: Checkout codebase
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-
-      - name: Setup vars
-        id: vars
-        run: |
-          echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"
-          echo "::set-output name=git_tag::$(git describe --tags --always)"
-
-      - name: Set up Go 1.x
-        uses: actions/setup-go@v2
-        with:
-          go-version: ^1.17
-
-      - name: Build
-        env:
-          GOOS: ${{ matrix.GOOS }}
-          GOARCH: ${{ matrix.GOARCH }}
-          CGO_ENABLED: 0
-        run: go build -trimpath -v -ldflags="-w -s -X main.AppVersion=${{ steps.vars.outputs.git_tag }}" -o um ./cmd/um
-
-      - name: Upload release assets
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          upload_url: ${{ needs.create_release.outputs.upload_url }}
-          asset_path: um
-          asset_name: um-${{ matrix.GOOS }}-${{ matrix.GOARCH }}${{ matrix.BIN_SUFFIX }}
-          asset_content_type: application/octet-stream
-

.gitignore

@@ -3,5 +3,7 @@
 /dist
 *.exe
 
+/um
 /um-*.tar.gz
 /um-*.zip
+/.vscode

README.md

@@ -14,12 +14,23 @@ Original: Web Edition https://git.unlock-music.dev/um/web
 - [x] All Algorithm Supported By `unlock-music/web`
 - [x] Complete Metadata & Cover Image
 
-## Hou to Build
+## Release
 
-- Requirements: **Golang 1.19**
+[Latest release](https://git.unlock-music.dev/um/cli/releases/latest).
+
+## Install from source
+
+- Requirements: **Golang 1.23.3**
 
 1. run `go install unlock-music.dev/cli/cmd/um@master`
 
+### Build from repo source
+
+1. Pull repo source.
+2. Build with `go build ./cmd/um`.
+
+It will produce `um` or `um.exe` (Windows).
+
 ## How to use
 
 - Drag the encrypted file to `um.exe` (Tested on Windows)

algo/common/dispatch.go

@@ -15,6 +15,9 @@ type DecoderParams struct {
 	FilePath string // optional, source file path
 
 	Logger *zap.Logger // required
+
+	// KuGou
+	KggDatabasePath string
 }
 type NewDecoderFunc func(p *DecoderParams) Decoder
 

algo/kgm/kgm.go

@@ -14,10 +14,12 @@ type Decoder struct {
 	offset int
 
 	header header
+
+	KggDatabasePath string
 }
 
 func NewDecoder(p *common.DecoderParams) common.Decoder {
-	return &Decoder{rd: p.Reader}
+	return &Decoder{rd: p.Reader, KggDatabasePath: p.KggDatabasePath}
 }
 
 // Validate checks if the file is a valid Kugou (.kgm, .vpr, .kgma) file.
@@ -34,6 +36,11 @@ func (d *Decoder) Validate() (err error) {
 		if err != nil {
 			return fmt.Errorf("kgm init crypto v3: %w", err)
 		}
+	case 5:
+		d.cipher, err = newKgmCryptoV5(&d.header, d.KggDatabasePath)
+		if err != nil {
+			return fmt.Errorf("kgm init crypto v5: %w", err)
+		}
 	default:
 		return fmt.Errorf("kgm: unsupported crypto version %d", d.header.CryptoVersion)
 	}
@@ -57,6 +64,7 @@ func (d *Decoder) Read(buf []byte) (int, error) {
 
 func init() {
 	// Kugou
+	common.RegisterDecoder("kgg", false, NewDecoder)
 	common.RegisterDecoder("kgm", false, NewDecoder)
 	common.RegisterDecoder("kgma", false, NewDecoder)
 	// Viper

algo/kgm/kgm_header.go

@@ -29,6 +29,8 @@ type header struct {
 	CryptoSlot     uint32 // 0x18-0x1b: crypto key slot
 	CryptoTestData []byte // 0x1c-0x2b: crypto test data
 	CryptoKey      []byte // 0x2c-0x3b: crypto key
+
+	AudioHash string // v5: audio hash
 }
 
 func (h *header) FromFile(rd io.ReadSeeker) error {
@@ -36,29 +38,56 @@ func (h *header) FromFile(rd io.ReadSeeker) error {
 		return fmt.Errorf("kgm seek start: %w", err)
 	}
 
-	buf := make([]byte, 0x3c)
+	return h.FromBytes(rd)
-	if _, err := io.ReadFull(rd, buf); err != nil {
-		return fmt.Errorf("kgm read header: %w", err)
-	}
-
-	return h.FromBytes(buf)
 }
 
-func (h *header) FromBytes(buf []byte) error {
+func (h *header) FromBytes(r io.ReadSeeker) error {
-	if len(buf) < 0x3c {
+	h.MagicHeader = make([]byte, 16)
-		return errors.New("invalid kgm header length")
+	_, err := r.Read(h.MagicHeader)
+	if err != nil {
+		return err
 	}
-
-	h.MagicHeader = buf[:0x10]
 	if !bytes.Equal(kgmHeader, h.MagicHeader) && !bytes.Equal(vprHeader, h.MagicHeader) {
 		return ErrKgmMagicHeader
 	}
 
-	h.AudioOffset = binary.LittleEndian.Uint32(buf[0x10:0x14])
+	err = binary.Read(r, binary.LittleEndian, &h.AudioOffset)
-	h.CryptoVersion = binary.LittleEndian.Uint32(buf[0x14:0x18])
+	if err != nil {
-	h.CryptoSlot = binary.LittleEndian.Uint32(buf[0x18:0x1c])
+		return err
-	h.CryptoTestData = buf[0x1c:0x2c]
+	}
-	h.CryptoKey = buf[0x2c:0x3c]
+	err = binary.Read(r, binary.LittleEndian, &h.CryptoVersion)
+	if err != nil {
+		return err
+	}
+	err = binary.Read(r, binary.LittleEndian, &h.CryptoSlot)
+	if err != nil {
+		return err
+	}
+	h.CryptoTestData = make([]byte, 0x10)
+	_, err = r.Read(h.CryptoTestData)
+	if err != nil {
+		return err
+	}
+	h.CryptoKey = make([]byte, 0x10)
+	_, err = r.Read(h.CryptoKey)
+	if err != nil {
+		return err
+	}
+
+	if h.CryptoVersion == 5 {
+		r.Seek(0x08, io.SeekCurrent)
+		var audioHashLen uint32 = 0
+		err = binary.Read(r, binary.LittleEndian, &audioHashLen)
+		if err != nil {
+			return err
+		}
+		audioHashBuffer := make([]byte, audioHashLen)
+		_, err = r.Read(audioHashBuffer)
+		if err != nil {
+			return err
+		}
+		h.AudioHash = string(audioHashBuffer)
+	}
 
 	return nil
 }

algo/kgm/kgm_v5.go

@@ -0,0 +1,30 @@
+package kgm
+
+import (
+	"fmt"
+
+	"unlock-music.dev/cli/algo/common"
+	"unlock-music.dev/cli/algo/kgm/pc_kugou_db"
+	"unlock-music.dev/cli/algo/qmc"
+)
+
+func newKgmCryptoV5(header *header, kggDatabasePath string) (common.StreamDecoder, error) {
+	if header.AudioHash == "" {
+		return nil, fmt.Errorf("kgm v5: missing audio hash")
+	}
+
+	if kggDatabasePath == "" {
+		return nil, fmt.Errorf("kgm v5: missing kgg database path")
+	}
+
+	m, err := pc_kugou_db.CachedDumpEKey(kggDatabasePath)
+	if err != nil {
+		return nil, fmt.Errorf("kgm v5: decrypt kgg database: %w", err)
+	}
+	ekey, ok := m[header.AudioHash]
+	if !ok || ekey == "" {
+		return nil, fmt.Errorf("kgm v5: ekey missing from db (audio_hash=%s)", header.AudioHash)
+	}
+
+	return qmc.NewQmcCipherDecoderFromEKey([]byte(ekey))
+}

algo/kgm/pc_kugou_db/cipher.go

@@ -0,0 +1,238 @@
+package pc_kugou_db
+
+// ported from lib_um_crypto_rust:
+//   https://git.unlock-music.dev/um/lib_um_crypto_rust/src/tag/v0.1.10/um_crypto/kgm/src/pc_db_decrypt
+
+import (
+	"bytes"
+	"context"
+	"crypto/aes"
+	"crypto/cipher"
+	"crypto/md5"
+	"database/sql"
+	"encoding/binary"
+	"fmt"
+	"os"
+	"sync"
+
+	_ "modernc.org/sqlite"
+)
+
+const PAGE_SIZE = 0x400
+
+var SQLITE_HEADER = []byte("SQLite format 3\x00")
+var DEFAULT_MASTER_KEY = []byte{
+	// master key (0x10 bytes)
+	0x1D, 0x61, 0x31, 0x45, 0xB2, 0x47, 0xBF, 0x7F, 0x3D, 0x18, 0x96, 0x72, 0x14, 0x4F, 0xE4, 0xBF,
+	0x00, 0x00, 0x00, 0x00, // page number (le)
+	0x73, 0x41, 0x6C, 0x54, // fixed value
+}
+
+func next_page_iv(seed uint32) uint32 {
+	var left uint32 = seed * 0x9EF4
+	var right uint32 = seed / 0xce26 * 0x7FFFFF07
+	var value uint32 = left - right
+	if value&0x8000_0000 == 0 {
+		return value
+	}
+	return value + 0x7FFF_FF07
+}
+
+func derive_page_aes_key(seed uint32) []byte {
+	master_key := make([]byte, len(DEFAULT_MASTER_KEY))
+	copy(master_key, DEFAULT_MASTER_KEY)
+	binary.LittleEndian.PutUint32(master_key[0x10:0x14], seed)
+	digest := md5.Sum(master_key)
+	return digest[:]
+}
+
+func derive_page_aes_iv(seed uint32) []byte {
+	iv := make([]byte, 0x10)
+	seed = seed + 1
+	for i := 0; i < 0x10; i += 4 {
+		seed = next_page_iv(seed)
+		binary.LittleEndian.PutUint32(iv[i:i+4], seed)
+	}
+	digest := md5.Sum(iv)
+	return digest[:]
+}
+
+func aes128cbcDecryptNoPadding(buffer, key, iv []byte) error {
+	if len(key) != 16 {
+		return fmt.Errorf("invalid key size: %d (must be 16 bytes for AES-128)", len(key))
+	}
+	if len(iv) != aes.BlockSize {
+		return fmt.Errorf("invalid IV size: %d (must be %d bytes)", len(iv), aes.BlockSize)
+	}
+	if len(buffer)%aes.BlockSize != 0 {
+		return fmt.Errorf("ciphertext length must be a multiple of %d bytes", aes.BlockSize)
+	}
+
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return err
+	}
+
+	mode := cipher.NewCBCDecrypter(block, iv)
+	mode.CryptBlocks(buffer, buffer)
+	return nil
+}
+
+func decrypt_db_page(buffer []byte, page_number uint32) error {
+	key := derive_page_aes_key(page_number)
+	iv := derive_page_aes_iv(page_number)
+
+	return aes128cbcDecryptNoPadding(buffer, key, iv)
+}
+
+func decrypt_page_1(page []byte) error {
+	if err := validate_page_1_header(page); err != nil {
+		return err
+	}
+
+	// Backup expected hdr value
+
+	expected_hdr_value := make([]byte, 8)
+	copy(expected_hdr_value, page[0x10:0x18])
+
+	// Copy encrypted hdr over
+	hdr := page[:0x10]
+	copy(page[0x10:0x18], hdr[0x08:0x10])
+
+	if err := decrypt_db_page(page[0x10:], 1); err != nil {
+		return err
+	}
+
+	// Validate header
+	if !bytes.Equal(page[0x10:0x18], expected_hdr_value[:8]) {
+		return fmt.Errorf("decrypt page 1 failed")
+	}
+
+	// Apply SQLite header
+	copy(hdr, SQLITE_HEADER)
+
+	return nil
+}
+
+func validate_page_1_header(header []byte) error {
+	o10 := binary.LittleEndian.Uint32(header[0x10:0x14])
+	o14 := binary.LittleEndian.Uint32(header[0x14:0x18])
+
+	v6 := ((o10 & 0xff) << 8) | ((o10 & 0xff00) << 16)
+	ok := o14 == 0x20204000 && (v6-0x200) <= 0xFE00 && ((v6-1)&v6) == 0
+	if !ok {
+		return fmt.Errorf("invalid page 1 header")
+	}
+	return nil
+}
+
+func decryptPcDatabase(buffer []byte) error {
+	db_size := len(buffer)
+
+	// not encrypted
+	if bytes.Equal(buffer[:len(SQLITE_HEADER)], SQLITE_HEADER) {
+		return nil
+	}
+
+	if db_size%PAGE_SIZE != 0 || db_size == 0 {
+		return fmt.Errorf("invalid database size: %d", db_size)
+	}
+
+	last_page := db_size / PAGE_SIZE
+
+	// page 1 is the header
+	if err := decrypt_page_1(buffer[:PAGE_SIZE]); err != nil {
+		return err
+	}
+
+	offset := PAGE_SIZE
+	for page_no := 2; page_no <= last_page; page_no++ {
+		if err := decrypt_db_page(buffer[offset:offset+PAGE_SIZE], uint32(page_no)); err != nil {
+			return err
+		}
+		offset += PAGE_SIZE
+	}
+
+	return nil
+}
+
+func extractKeyMapping(buffer []byte) (map[string]string, error) {
+	// Create an in-memory SQLite database
+	db, err := sql.Open("sqlite", "file::memory:?mode=memory&cache=shared")
+	if err != nil {
+		return nil, err
+	}
+	defer db.Close()
+
+	conn, err := db.Conn(context.Background())
+	if err != nil {
+		return nil, err
+	}
+
+	err = func() error {
+		defer conn.Close()
+		return conn.Raw(func(driverConn any) error {
+			type serializer interface {
+				Serialize() ([]byte, error)
+				Deserialize([]byte) error
+			}
+			return driverConn.(serializer).Deserialize(buffer)
+		})
+	}()
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to import db: %w", err)
+	}
+
+	conn, err = db.Conn(context.Background())
+	if err != nil {
+		return nil, err
+	}
+
+	rows, err := conn.QueryContext(context.Background(), `
+		select EncryptionKeyId, EncryptionKey from ShareFileItems
+		where EncryptionKey != '' and EncryptionKey is not null
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	m := make(map[string]string)
+	for rows.Next() {
+		var keyId, key string
+		if err := rows.Scan(&keyId, &key); err != nil {
+			continue
+		}
+		m[keyId] = key
+	}
+
+	return m, err
+}
+
+var kugouPcDatabaseDumpLock = &sync.Mutex{}
+var kugouPcDatabaseDump = make(map[string]map[string]string)
+
+func CachedDumpEKey(dbPath string) (map[string]string, error) {
+	dump, exist := kugouPcDatabaseDump[dbPath]
+	if !exist {
+		kugouPcDatabaseDumpLock.Lock()
+		defer kugouPcDatabaseDumpLock.Unlock()
+
+		if dump, exist = kugouPcDatabaseDump[dbPath]; !exist {
+			buffer, err := os.ReadFile(dbPath)
+			if err != nil {
+				return nil, err
+			}
+			if err = decryptPcDatabase(buffer); err != nil {
+				return nil, err
+			}
+			dump, err = extractKeyMapping(buffer)
+			if err != nil {
+				return nil, err
+			}
+			kugouPcDatabaseDump[dbPath] = dump
+		}
+	}
+
+	return dump, nil
+}

algo/kgm/pc_kugou_db/cipher_test.go

@@ -0,0 +1,22 @@
+package pc_kugou_db
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestDerivePageAESKey_Page0(t *testing.T) {
+	expectedKey := []byte{0x19, 0x62, 0xc0, 0x5f, 0xa2, 0xeb, 0xbe, 0x24, 0x28, 0xff, 0x52, 0x2b, 0x9e, 0x03, 0xea, 0xd4}
+	pageKey := derive_page_aes_key(0)
+	if !reflect.DeepEqual(expectedKey, pageKey) {
+		t.Errorf("Derived AES key for page 0 does not match expected value: got %v, want %v", pageKey, expectedKey)
+	}
+}
+
+func TestDerivePageAESIv_Page0(t *testing.T) {
+	expectedIv := []byte{0x05, 0x5a, 0x67, 0x35, 0x93, 0x89, 0x2d, 0xdf, 0x3a, 0xb3, 0xb3, 0xc6, 0x21, 0xc3, 0x48, 0x02}
+	pageKey := derive_page_aes_iv(0)
+	if !reflect.DeepEqual(expectedIv, pageKey) {
+		t.Errorf("Derived AES iv for page 0 does not match expected value: got %v, want %v", pageKey, expectedIv)
+	}
+}

algo/qmc/qmc.go

@@ -5,12 +5,13 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
-	"go.uber.org/zap"
 	"io"
 	"runtime"
 	"strconv"
 	"strings"
 
+	"go.uber.org/zap"
+
 	"unlock-music.dev/cli/algo/common"
 	"unlock-music.dev/cli/internal/sniff"
 )
@@ -59,6 +60,23 @@ func NewDecoder(p *common.DecoderParams) common.Decoder {
 	return &Decoder{raw: p.Reader, params: p, logger: p.Logger}
 }
 
+func NewQmcCipherDecoder(key []byte) (common.StreamDecoder, error) {
+	if len(key) > 300 {
+		return newRC4Cipher(key)
+	} else if len(key) != 0 {
+		return newMapCipher(key)
+	}
+	return newStaticCipher(), nil
+}
+
+func NewQmcCipherDecoderFromEKey(ekey []byte) (common.StreamDecoder, error) {
+	key, err := deriveKey(ekey)
+	if err != nil {
+		return nil, err
+	}
+	return NewQmcCipherDecoder(key)
+}
+
 func (d *Decoder) Validate() error {
 	// search & derive key
 	err := d.searchKey()
@@ -67,18 +85,9 @@ func (d *Decoder) Validate() error {
 	}
 
 	// check cipher type and init decode cipher
-	if len(d.decodedKey) > 300 {
+	d.cipher, err = NewQmcCipherDecoder(d.decodedKey)
-		d.cipher, err = newRC4Cipher(d.decodedKey)
 	if err != nil {
-			return err
+		return fmt.Errorf("qmc init cipher: %w", err)
-		}
-	} else if len(d.decodedKey) != 0 {
-		d.cipher, err = newMapCipher(d.decodedKey)
-		if err != nil {
-			return err
-		}
-	} else {
-		d.cipher = newStaticCipher()
 	}
 
 	// test with first 16 bytes
@@ -185,11 +194,7 @@ func (d *Decoder) readRawKey(rawKeyLen int64) error {
 	rawKeyData = bytes.TrimRight(rawKeyData, "\x00")
 
 	d.decodedKey, err = deriveKey(rawKeyData)
-	if err != nil {
 	return err
-	}
-
-	return nil
 }
 
 func (d *Decoder) readRawMetaQTag() error {
@@ -263,7 +268,7 @@ func init() {
 	// New ogg/flac:
 	extraExtsCanHaveSuffix := []string{"mgg", "mflac"}
 	// Mac also adds some extra suffix to ext:
-	extraExtSuffix := []string{"0", "1", "a", "h", "l"}
+	extraExtSuffix := []string{"0", "1", "a", "h", "l", "m"}
 	for _, ext := range extraExtsCanHaveSuffix {
 		common.RegisterDecoder(ext, false, NewDecoder)
 		for _, suffix := range extraExtSuffix {

cmd/um/main.go

@@ -5,20 +5,20 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/fsnotify/fsnotify"
-	"github.com/urfave/cli/v2"
-	"go.uber.org/zap"
-	"go.uber.org/zap/zapcore"
 	"io"
 	"os"
 	"os/signal"
-	"path"
 	"path/filepath"
 	"runtime"
 	"runtime/debug"
 	"sort"
 	"strings"
 	"time"
+
+	"github.com/fsnotify/fsnotify"
+	"github.com/urfave/cli/v2"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
 	"unlock-music.dev/cli/algo/common"
 	_ "unlock-music.dev/cli/algo/kgm"
 	_ "unlock-music.dev/cli/algo/kwm"
@@ -32,7 +32,7 @@ import (
 	"unlock-music.dev/cli/internal/utils"
 )
 
-var AppVersion = "v0.2.9"
+var AppVersion = "custom"
 
 var logger = setupLogger(false) // TODO: inject logger to application, instead of using global logger
 
@@ -51,6 +51,7 @@ func main() {
 			&cli.StringFlag{Name: "output", Aliases: []string{"o"}, Usage: "path to output dir", Required: false},
 			&cli.StringFlag{Name: "qmc-mmkv", Aliases: []string{"db"}, Usage: "path to qmc mmkv (.crc file also required)", Required: false},
 			&cli.StringFlag{Name: "qmc-mmkv-key", Aliases: []string{"key"}, Usage: "mmkv password (16 ascii chars)", Required: false},
+			&cli.StringFlag{Name: "kgg-db", Usage: "path to kgg db (win32 kugou v11)", Required: false},
 			&cli.BoolFlag{Name: "remove-source", Aliases: []string{"rs"}, Usage: "remove source file", Required: false, Value: false},
 			&cli.BoolFlag{Name: "skip-noop", Aliases: []string{"n"}, Usage: "skip noop decoder", Required: false, Value: true},
 			&cli.BoolFlag{Name: "verbose", Aliases: []string{"V"}, Usage: "verbose logging", Required: false, Value: false},
@@ -135,6 +136,11 @@ func appMain(c *cli.Context) (err error) {
 		}
 	}
 
+	input, absErr := filepath.Abs(input)
+	if absErr != nil {
+		return fmt.Errorf("get abs path failed: %w", absErr)
+	}
+
 	output := c.String("output")
 	inputStat, err := os.Stat(input)
 	if err != nil {
@@ -145,13 +151,18 @@ func appMain(c *cli.Context) (err error) {
 	if inputStat.IsDir() {
 		inputDir = input
 	} else {
-		inputDir = path.Dir(input)
+		inputDir = filepath.Dir(input)
+	}
+	inputDir, absErr = filepath.Abs(inputDir)
+	if absErr != nil {
+		return fmt.Errorf("get abs path (inputDir) failed: %w", absErr)
 	}
 
 	if output == "" {
 		// Default to where the input dir is
 		output = inputDir
 	}
+	logger.Debug("resolve input/output path", zap.String("inputDir", inputDir), zap.String("input", input), zap.String("output", output))
 
 	outputStat, err := os.Stat(output)
 	if err != nil {
@@ -174,10 +185,16 @@ func appMain(c *cli.Context) (err error) {
 		}
 	}
 
+	kggDbPath := c.String("kgg-db")
+	if kggDbPath == "" {
+		kggDbPath = filepath.Join(os.Getenv("APPDATA"), "Kugou8", "KGMusicV3.db")
+	}
+
 	proc := &processor{
 		logger:          logger,
 		inputDir:        inputDir,
 		outputDir:       output,
+		kggDbPath:       kggDbPath,
 		skipNoopDecoder: c.Bool("skip-noop"),
 		removeSource:    c.Bool("remove-source"),
 		updateMetadata:  c.Bool("update-metadata"),
@@ -202,6 +219,8 @@ type processor struct {
 	inputDir  string
 	outputDir string
 
+	kggDbPath string
+
 	skipNoopDecoder bool
 	removeSource    bool
 	updateMetadata  bool
@@ -290,6 +309,8 @@ func (p *processor) processDir(inputDir string) error {
 }
 
 func (p *processor) processFile(filePath string) error {
+	p.logger.Debug("processFile", zap.String("file", filePath), zap.String("inputDir", p.inputDir))
+
 	allDec := common.GetDecoder(filePath, p.skipNoopDecoder)
 	if len(allDec) == 0 {
 		return errors.New("skipping while no suitable decoder")
@@ -335,6 +356,7 @@ func (p *processor) process(inputFile string, allDec []common.DecoderFactory) er
 		Extension:       filepath.Ext(inputFile),
 		FilePath:        inputFile,
 		Logger:          logger,
+		KggDatabasePath: p.kggDbPath,
 	})
 	if err != nil {
 		return err

go.mod

@@ -1,26 +1,35 @@
 module unlock-music.dev/cli
 
-go 1.19
+go 1.23.3
 
 require (
-	github.com/fsnotify/fsnotify v1.7.0
+	github.com/fsnotify/fsnotify v1.8.0
 	github.com/go-flac/flacpicture v0.3.0
 	github.com/go-flac/flacvorbis v0.2.0
 	github.com/go-flac/go-flac v1.0.0
-	github.com/samber/lo v1.39.0
+	github.com/samber/lo v1.47.0
-	github.com/urfave/cli/v2 v2.27.1
+	github.com/urfave/cli/v2 v2.27.5
 	go.uber.org/zap v1.27.0
-	golang.org/x/crypto v0.26.0
+	golang.org/x/crypto v0.29.0
-	golang.org/x/exp v0.0.0-20240416160154-fe59bbe5cc7f
+	golang.org/x/exp v0.0.0-20250305212735-054e65f0b394
-	golang.org/x/text v0.17.0
+	golang.org/x/text v0.20.0
-	unlock-music.dev/mmkv v0.0.0-20240424090133-31549c6a948b
+	unlock-music.dev/mmkv v0.1.0
 )
 
 require (
-	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v0.1.9 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/xrash/smetrics v0.0.0-20240312152122-5f08fbb34913 // indirect
+	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/sys v0.23.0 // indirect
+	golang.org/x/sys v0.31.0 // indirect
-	google.golang.org/protobuf v1.33.0 // indirect
+	google.golang.org/protobuf v1.35.2 // indirect
+	modernc.org/libc v1.62.1 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.9.1 // indirect
+	modernc.org/sqlite v1.37.0 // indirect
 )

go.sum

@@ -1,47 +1,83 @@
 github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.5 h1:ZtcqGrnekaHpVLArFSe4HK5DoKx1T0rq2DwVB0alcyc=
+github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
 github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
+github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/8M=
+github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 github.com/go-flac/flacpicture v0.3.0 h1:LkmTxzFLIynwfhHiZsX0s8xcr3/u33MzvV89u+zOT8I=
 github.com/go-flac/flacpicture v0.3.0/go.mod h1:DPbrzVYQ3fJcvSgLFp9HXIrEQEdfdk/+m0nQCzwodZI=
 github.com/go-flac/flacvorbis v0.2.0 h1:KH0xjpkNTXFER4cszH4zeJxYcrHbUobz/RticWGOESs=
 github.com/go-flac/flacvorbis v0.2.0/go.mod h1:uIysHOtuU7OLGoCRG92bvnkg7QEqHx19qKRV6K1pBrI=
 github.com/go-flac/go-flac v1.0.0 h1:6qI9XOVLcO50xpzm3nXvO31BgDgHhnr/p/rER/K/doY=
 github.com/go-flac/go-flac v1.0.0/go.mod h1:WnZhcpmq4u1UdZMNn9LYSoASpWOCMOoxXxcWEHSzkW8=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdhx/f4=
+github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/samber/lo v1.39.0 h1:4gTz1wUhNYLhFSKl6O+8peW0v2F4BCY034GRpU9WnuA=
 github.com/samber/lo v1.39.0/go.mod h1:+m/ZKRl6ClXCE2Lgf3MsQlWfh4bn1bz6CXEOxnEXnEA=
+github.com/samber/lo v1.47.0 h1:z7RynLwP5nbyRscyvcD043DWYoOcYRv3mV8lBeqOCLc=
+github.com/samber/lo v1.47.0/go.mod h1:RmDH9Ct32Qy3gduHQuKJ3gW1fMHAnE/fAzQuf6He5cU=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 github.com/urfave/cli/v2 v2.27.1 h1:8xSQ6szndafKVRmfyeUMxkNUJQMjL1F2zmsZ+qHpfho=
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