diff --git a/algo/ximalaya/x2m_crypto.go b/algo/ximalaya/x2m_crypto.go new file mode 100644 index 0000000..602a75e --- /dev/null +++ b/algo/ximalaya/x2m_crypto.go @@ -0,0 +1,34 @@ +package ximalaya + +import ( + _ "embed" + "encoding/binary" +) + +const x2mHeaderSize = 1024 + +var x2mKey = [...]byte{'x', 'm', 'l', 'y'} +var x2mScrambleTable = [x2mHeaderSize]uint16{} + +//go:embed x2m_scramble_table.bin +var x2mScrambleTableBytes []byte + +func init() { + if len(x2mScrambleTableBytes) != 2*x2mHeaderSize { + panic("invalid x3m scramble table") + } + for i := range x3mScrambleTable { + x3mScrambleTable[i] = binary.LittleEndian.Uint16(x2mScrambleTableBytes[i*2:]) + } +} + +// decryptX2MHeader decrypts the header of ximalaya .x2m file. +// make sure input src is 1024(x2mHeaderSize) bytes long. +func decryptX2MHeader(src []byte) []byte { + dst := make([]byte, len(src)) + for dstIdx := range src { + srcIdx := x2mScrambleTable[dstIdx] + dst[dstIdx] = src[srcIdx] ^ x2mKey[dstIdx%len(x2mKey)] + } + return dst +} diff --git a/algo/ximalaya/x2m_scramble_table.bin b/algo/ximalaya/x2m_scramble_table.bin new file mode 100644 index 0000000..ab586dd Binary files /dev/null and b/algo/ximalaya/x2m_scramble_table.bin differ diff --git a/algo/ximalaya/x3m_crypto.go b/algo/ximalaya/x3m_crypto.go new file mode 100644 index 0000000..b147944 --- /dev/null +++ b/algo/ximalaya/x3m_crypto.go @@ -0,0 +1,40 @@ +package ximalaya + +import ( + _ "embed" + "encoding/binary" +) + +var x3mKey = [...]byte{ + '3', '9', '8', '9', 'd', '1', '1', '1', + 'a', 'a', 'd', '5', '6', '1', '3', '9', + '4', '0', 'f', '4', 'f', 'c', '4', '4', + 'b', '6', '3', '9', 'b', '2', '9', '2', +} + +const x3mHeaderSize = 1024 + +var x3mScrambleTable = [x3mHeaderSize]uint16{} + +//go:embed x3m_scramble_table.bin +var x3mScrambleTableBytes []byte + +func init() { + if len(x3mScrambleTableBytes) != 2*x3mHeaderSize { + panic("invalid x3m scramble table") + } + for i := range x3mScrambleTable { + x3mScrambleTable[i] = binary.LittleEndian.Uint16(x3mScrambleTableBytes[i*2:]) + } +} + +// decryptX3MHeader decrypts the header of ximalaya .x3m file. +// make sure input src is 1024 (x3mHeaderSize) bytes long. +func decryptX3MHeader(src []byte) []byte { + dst := make([]byte, len(src)) + for dstIdx := range src { + srcIdx := x3mScrambleTable[dstIdx] + dst[dstIdx] = src[srcIdx] ^ x3mKey[dstIdx%len(x3mKey)] + } + return dst +} diff --git a/algo/ximalaya/x3m_scramble_table.bin b/algo/ximalaya/x3m_scramble_table.bin new file mode 100644 index 0000000..b43f50e Binary files /dev/null and b/algo/ximalaya/x3m_scramble_table.bin differ diff --git a/algo/ximalaya/ximalaya.go b/algo/ximalaya/ximalaya.go new file mode 100644 index 0000000..cbe5457 --- /dev/null +++ b/algo/ximalaya/ximalaya.go @@ -0,0 +1,56 @@ +package ximalaya + +import ( + "bytes" + "fmt" + "io" + + "unlock-music.dev/cli/algo/common" +) + +type Decoder struct { + rd io.ReadSeeker + offset int + + audio io.Reader +} + +func NewDecoder(rd io.ReadSeeker) common.Decoder { + return &Decoder{rd: rd} +} + +func (d *Decoder) Validate() error { + encryptedHeader := make([]byte, x2mHeaderSize) + if _, err := io.ReadFull(d.rd, encryptedHeader); err != nil { + return fmt.Errorf("ximalaya read header: %w", err) + } + + { // try to decode with x2m + header := decryptX2MHeader(encryptedHeader) + if _, ok := common.SniffAll(header); ok { + d.audio = io.MultiReader(bytes.NewReader(header), d.rd) + return nil + } + } + + { // try to decode with x3m + // not read file again, since x2m and x3m have the same header size + header := decryptX3MHeader(encryptedHeader) + if _, ok := common.SniffAll(header); ok { + d.audio = io.MultiReader(bytes.NewReader(header), d.rd) + return nil + } + } + + return fmt.Errorf("ximalaya: unknown format") +} + +func (d *Decoder) Read(p []byte) (n int, err error) { + return d.audio.Read(p) +} + +func init() { + common.RegisterDecoder("x2m", false, NewDecoder) + common.RegisterDecoder("x3m", false, NewDecoder) + common.RegisterDecoder("xm", false, NewDecoder) +} diff --git a/cmd/um/main.go b/cmd/um/main.go index 63765b4..d6d9adb 100644 --- a/cmd/um/main.go +++ b/cmd/um/main.go @@ -23,6 +23,7 @@ import ( _ "unlock-music.dev/cli/algo/qmc" _ "unlock-music.dev/cli/algo/tm" _ "unlock-music.dev/cli/algo/xiami" + _ "unlock-music.dev/cli/algo/ximalaya" "unlock-music.dev/cli/internal/logging" ) diff --git a/go.mod b/go.mod index 332442c..cacf056 100644 --- a/go.mod +++ b/go.mod @@ -1,11 +1,12 @@ module unlock-music.dev/cli -go 1.17 +go 1.19 require ( github.com/urfave/cli/v2 v2.23.5 go.uber.org/zap v1.23.0 golang.org/x/crypto v0.3.0 + golang.org/x/exp v0.0.0-20221114191408-850992195362 ) require ( diff --git a/go.sum b/go.sum index 9905ee6..62cb0e3 100644 --- a/go.sum +++ b/go.sum @@ -1,88 +1,35 @@ -github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ= github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8= -github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA= github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w= github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o= github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 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/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo= -github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ= -github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I= -github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0= 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/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/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= -github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw= github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= -github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk= -github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU= github.com/urfave/cli/v2 v2.23.5 h1:xbrU7tAYviSpqeR3X4nEFWUdB/uDZ6DE+HxmRU7Xtyw= github.com/urfave/cli/v2 v2.23.5/go.mod h1:GHupkWPMM0M/sj1a2b4wUrWBPzazNrIjouW6fmdJLxc= github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 h1:bAn7/zixMGCfxrRTfdpNzjtPYqr8smhKouy9mxVdGPU= github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673/go.mod h1:N3UwUGtsrSj3ccvlPHLoLsHnpR27oXr4ZE984MbSER8= -github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k= -github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY= go.uber.org/atomic v1.7.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc= go.uber.org/atomic v1.10.0 h1:9qC72Qh0+3MqyJbAn8YU5xVq1frD8bn3JtD2oXtafVQ= go.uber.org/atomic v1.10.0/go.mod h1:LUxbIzbOniOlMKjJjyPfpl4v+PKK2cNJn91OQbhoJI0= go.uber.org/goleak v1.1.11 h1:wy28qYRKZgnJTxGxvye5/wgWr1EKjmUDGYox5mGlRlI= -go.uber.org/goleak v1.1.11/go.mod h1:cwTWslyiVhfpKIDGSZEM2HlOvcqm+tG4zioyIeLoqMQ= -go.uber.org/multierr v1.6.0/go.mod h1:cdWPpRnG4AhwMwsgIHip0KRBQjJy5kYEpYjJxpXp9iU= go.uber.org/multierr v1.8.0 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