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feat(QMCv2): support static cipher (legacy)

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This commit is contained in:
MengYX
2021-12-14 02:19:32 +08:00
parent 1025010395
commit 7cc7aa19fd
7 changed files with 157 additions and 42 deletions
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23
algo/qmc/old_qmc.go
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@@ -4,6 +4,7 @@ import (
"encoding/base64"
"encoding/binary"
"errors"
"github.com/unlock-music/cli/algo/common"
)
@@ -13,7 +14,7 @@ var (
ErrQmcKeyLength = errors.New("unexpected decoded qmc key length")
)
type Decoder struct {
type OldDecoder struct {
file []byte
maskDetector func(encodedData []byte) (*Key256Mask, error)
mask *Key256Mask
@@ -23,14 +24,14 @@ type Decoder struct {
}
func NewMflac256Decoder(data []byte) common.Decoder {
return &Decoder{file: data, maskDetector: detectMflac256Mask, audioExt: "flac"}
return &OldDecoder{file: data, maskDetector: detectMflac256Mask, audioExt: "flac"}
}
func NewMgg256Decoder(data []byte) common.Decoder {
return &Decoder{file: data, maskDetector: detectMgg256Mask, audioExt: "ogg"}
return &OldDecoder{file: data, maskDetector: detectMgg256Mask, audioExt: "ogg"}
}
func (d *Decoder) Validate() error {
func (d *OldDecoder) Validate() error {
if nil != d.mask {
return nil
}
@@ -45,7 +46,7 @@ func (d *Decoder) Validate() error {
return errors.New("no mask or mask detector found")
}
func (d *Decoder) validateKey() error {
func (d *OldDecoder) validateKey() error {
lenData := len(d.file)
if lenData < 4 {
return ErrQmcFileLength
@@ -70,33 +71,33 @@ func (d *Decoder) validateKey() error {
}
func (d *Decoder) Decode() error {
func (d *OldDecoder) Decode() error {
d.audio = d.mask.Decrypt(d.file)
return nil
}
func (d Decoder) GetCoverImage() []byte {
func (d OldDecoder) GetCoverImage() []byte {
return nil
}
func (d Decoder) GetAudioData() []byte {
func (d OldDecoder) GetAudioData() []byte {
return d.audio
}
func (d Decoder) GetAudioExt() string {
func (d OldDecoder) GetAudioExt() string {
if d.audioExt != "" {
return "." + d.audioExt
}
return ""
}
func (d Decoder) GetMeta() common.Meta {
func (d OldDecoder) GetMeta() common.Meta {
return nil
}
func DecoderFuncWithExt(ext string) common.NewDecoderFunc {
return func(file []byte) common.Decoder {
return &Decoder{file: file, audioExt: ext, mask: getDefaultMask()}
return &OldDecoder{file: file, audioExt: ext, mask: getDefaultMask()}
}
}