From b275b552ede8e4b1c53b00fc891b0a91674826ad Mon Sep 17 00:00:00 2001 From: Unlock Music Dev Date: Sat, 19 Nov 2022 07:25:42 +0800 Subject: [PATCH] refactor: use kgm crypto from `parakeet-rs` chore: update deps --- algo/kgm/kgm.go | 62 ++++++++++++++--------------- algo/kgm/kgm_header.go | 64 ++++++++++++++++++++++++++++++ algo/kgm/kgm_v3.go | 66 +++++++++++++++++++++++++++++++ algo/kgm/mask.go | 88 ------------------------------------------ go.mod | 14 +++---- go.sum | 63 ++++++++++++++++++------------ 6 files changed, 207 insertions(+), 150 deletions(-) create mode 100644 algo/kgm/kgm_header.go create mode 100644 algo/kgm/kgm_v3.go delete mode 100644 algo/kgm/mask.go diff --git a/algo/kgm/kgm.go b/algo/kgm/kgm.go index 49a6967..00e7098 100644 --- a/algo/kgm/kgm.go +++ b/algo/kgm/kgm.go @@ -2,27 +2,24 @@ package kgm import ( "bytes" - "encoding/binary" - "errors" + "fmt" + "io" "github.com/unlock-music/cli/algo/common" ) -var ( - vprHeader = []byte{ - 0x05, 0x28, 0xBC, 0x96, 0xE9, 0xE4, 0x5A, 0x43, - 0x91, 0xAA, 0xBD, 0xD0, 0x7A, 0xF5, 0x36, 0x31} - kgmHeader = []byte{ - 0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B, - 0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14} - ErrKgmMagicHeader = errors.New("kgm/vpr magic header not matched") -) - type Decoder struct { - file []byte - key []byte - maskFunc func(int) byte - audio []byte + header Header + initializer kgmCryptoInitializer + + file []byte + audio []byte +} + +type kgmCryptoInitializer func(header *Header, body io.Reader) (io.Reader, error) + +var kgmCryptoInitializers = map[uint32]kgmCryptoInitializer{ + 3: newKgmCryptoV3, } func NewDecoder(file []byte) common.Decoder { @@ -44,31 +41,34 @@ func (d *Decoder) GetMeta() common.Meta { } func (d *Decoder) Validate() error { - if bytes.Equal(kgmHeader, d.file[:len(kgmHeader)]) { - d.maskFunc = getKgmMask - } else if bytes.Equal(vprHeader, d.file[:len(vprHeader)]) { - d.maskFunc = getVprMask - } else { - return ErrKgmMagicHeader + if err := d.header.FromBytes(d.file); err != nil { + return err + } + // TODO; validate crypto version + + var ok bool + d.initializer, ok = kgmCryptoInitializers[d.header.CryptoVersion] + if !ok { + return fmt.Errorf("kgm: unsupported crypto version %d", d.header.CryptoVersion) } - d.key = d.file[0x1c:0x2c] - d.key = append(d.key, 0x00) - _ = d.file[0x2c:0x3c] //todo: key2 return nil } func (d *Decoder) Decode() error { - headerLen := binary.LittleEndian.Uint32(d.file[0x10:0x14]) - d.audio = d.file[headerLen:] + d.audio = d.file[d.header.AudioOffset:] - for i := 0; i < len(d.audio); i++ { - med8 := d.audio[i] ^ d.key[i%17] ^ d.maskFunc(i) - d.audio[i] = med8 ^ (med8&0xf)<<4 + r, err := d.initializer(&d.header, bytes.NewReader(d.audio)) + if err != nil { + return fmt.Errorf("kgm: failed to initialize crypto: %w", err) + } + d.audio, err = io.ReadAll(r) + if err != nil { + return fmt.Errorf("kgm: failed to decrypt audio: %w", err) } - return nil } + func init() { // Kugou common.RegisterDecoder("kgm", false, NewDecoder) diff --git a/algo/kgm/kgm_header.go b/algo/kgm/kgm_header.go new file mode 100644 index 0000000..f7c6539 --- /dev/null +++ b/algo/kgm/kgm_header.go @@ -0,0 +1,64 @@ +package kgm + +import ( + "bytes" + "encoding/binary" + "errors" + "fmt" + "io" +) + +var ( + vprHeader = []byte{ + 0x05, 0x28, 0xBC, 0x96, 0xE9, 0xE4, 0x5A, 0x43, + 0x91, 0xAA, 0xBD, 0xD0, 0x7A, 0xF5, 0x36, 0x31, + } + kgmHeader = []byte{ + 0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B, + 0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14, + } + + ErrKgmMagicHeader = errors.New("kgm magic header not matched") +) + +// Header is the header of a KGM file. +type Header struct { + MagicHeader []byte // 0x00-0x0f: magic header + AudioOffset uint32 // 0x10-0x13: offset of audio data + CryptoVersion uint32 // 0x14-0x17: crypto version + CryptoSlot uint32 // 0x18-0x1b: crypto key slot + CryptoTestData []byte // 0x1c-0x2b: crypto test data + CryptoKey []byte // 0x2c-0x3b: crypto key +} + +func (h *Header) FromFile(rd io.ReadSeeker) error { + if _, err := rd.Seek(0, io.SeekStart); err != nil { + return fmt.Errorf("kgm seek start: %w", err) + } + + buf := make([]byte, 0x3c) + 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 { + if len(buf) < 0x3c { + return errors.New("invalid kgm header length") + } + + 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]) + h.CryptoVersion = binary.LittleEndian.Uint32(buf[0x14:0x18]) + h.CryptoSlot = binary.LittleEndian.Uint32(buf[0x18:0x1c]) + h.CryptoTestData = buf[0x1c:0x2c] + h.CryptoKey = buf[0x2c:0x3c] + + return nil +} diff --git a/algo/kgm/kgm_v3.go b/algo/kgm/kgm_v3.go new file mode 100644 index 0000000..1a04c23 --- /dev/null +++ b/algo/kgm/kgm_v3.go @@ -0,0 +1,66 @@ +package kgm + +import ( + "crypto/md5" + "fmt" + "io" +) + +// kgmCryptoV3 is kgm file crypto v3 +type kgmCryptoV3 struct { + slotBox []byte + fileBox []byte + + rd io.Reader + offset int +} + +var kgmV3Slot2Key = map[uint32][]byte{ + 1: {0x6C, 0x2C, 0x2F, 0x27}, +} + +func newKgmCryptoV3(header *Header, body io.Reader) (io.Reader, error) { + c := &kgmCryptoV3{rd: body} + + slotKey, ok := kgmV3Slot2Key[header.CryptoSlot] + if !ok { + return nil, fmt.Errorf("kgm3: unknown crypto slot %d", header.CryptoSlot) + } + c.slotBox = kugouMD5(slotKey) + + c.fileBox = append(kugouMD5(header.CryptoKey), 0x6b) + + return c, nil +} + +func (d *kgmCryptoV3) Read(buf []byte) (int, error) { + n, err := d.rd.Read(buf) + if n > 0 { + d.decrypt(buf[:n], d.offset) + d.offset += n + } + return n, err +} + +func (d *kgmCryptoV3) decrypt(b []byte, offset int) { + for i := 0; i < len(b); i++ { + b[i] ^= d.fileBox[(offset+i)%len(d.fileBox)] + b[i] ^= b[i] << 4 + b[i] ^= d.slotBox[(offset+i)%len(d.slotBox)] + b[i] ^= xorCollapseUint32(uint32(offset + i)) + } +} + +func xorCollapseUint32(i uint32) byte { + return byte(i) ^ byte(i>>8) ^ byte(i>>16) ^ byte(i>>24) +} + +func kugouMD5(b []byte) []byte { + digest := md5.Sum(b) + ret := make([]byte, 16) + for i := 0; i < md5.Size; i += 2 { + ret[i] = digest[14-i] + ret[i+1] = digest[14-i+1] + } + return ret +} diff --git a/algo/kgm/mask.go b/algo/kgm/mask.go deleted file mode 100644 index 092b379..0000000 --- a/algo/kgm/mask.go +++ /dev/null @@ -1,88 +0,0 @@ -package kgm - -import ( - _ "embed" -) - -var kgmMaskTable1 = [...]byte{ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x01, 0x21, 0x01, 0x61, 0x01, 0x21, 0x01, 0xe1, 0x01, 0x21, 0x01, 0x61, 0x01, 0x21, 0x01, - 0xd2, 0x23, 0x02, 0x02, 0x42, 0x42, 0x02, 0x02, 0xc2, 0xc2, 0x02, 0x02, 0x42, 0x42, 0x02, 0x02, - 0xd3, 0xd3, 0x02, 0x03, 0x63, 0x43, 0x63, 0x03, 0xe3, 0xc3, 0xe3, 0x03, 0x63, 0x43, 0x63, 0x03, - 0x94, 0xb4, 0x94, 0x65, 0x04, 0x04, 0x04, 0x04, 0x84, 0x84, 0x84, 0x84, 0x04, 0x04, 0x04, 0x04, - 0x95, 0x95, 0x95, 0x95, 0x04, 0x05, 0x25, 0x05, 0xe5, 0x85, 0xa5, 0x85, 0xe5, 0x05, 0x25, 0x05, - 0xd6, 0xb6, 0x96, 0xb6, 0xd6, 0x27, 0x06, 0x06, 0xc6, 0xc6, 0x86, 0x86, 0xc6, 0xc6, 0x06, 0x06, - 0xd7, 0xd7, 0x97, 0x97, 0xd7, 0xd7, 0x06, 0x07, 0xe7, 0xc7, 0xe7, 0x87, 0xe7, 0xc7, 0xe7, 0x07, - 0x18, 0x38, 0x18, 0x78, 0x18, 0x38, 0x18, 0xe9, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, - 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x08, 0x09, 0x29, 0x09, 0x69, 0x09, 0x29, 0x09, - 0xda, 0x3a, 0x1a, 0x3a, 0x5a, 0x3a, 0x1a, 0x3a, 0xda, 0x2b, 0x0a, 0x0a, 0x4a, 0x4a, 0x0a, 0x0a, - 0xdb, 0xdb, 0x1b, 0x1b, 0x5b, 0x5b, 0x1b, 0x1b, 0xdb, 0xdb, 0x0a, 0x0b, 0x6b, 0x4b, 0x6b, 0x0b, - 0x9c, 0xbc, 0x9c, 0x7c, 0x1c, 0x3c, 0x1c, 0x7c, 0x9c, 0xbc, 0x9c, 0x6d, 0x0c, 0x0c, 0x0c, 0x0c, - 0x9d, 0x9d, 0x9d, 0x9d, 0x1d, 0x1d, 0x1d, 0x1d, 0x9d, 0x9d, 0x9d, 0x9d, 0x0c, 0x0d, 0x2d, 0x0d, - 0xde, 0xbe, 0x9e, 0xbe, 0xde, 0x3e, 0x1e, 0x3e, 0xde, 0xbe, 0x9e, 0xbe, 0xde, 0x2f, 0x0e, 0x0e, - 0xdf, 0xdf, 0x9f, 0x9f, 0xdf, 0xdf, 0x1f, 0x1f, 0xdf, 0xdf, 0x9f, 0x9f, 0xdf, 0xdf, 0x0e, 0x0f, - 0x00, 0x20, 0x00, 0x60, 0x00, 0x20, 0x00, 0xe0, 0x00, 0x20, 0x00, 0x60, 0x00, 0x20, 0x00, 0xf1, -} - -var kgmMaskTable2 = [...]byte{ - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x01, 0x23, 0x01, 0x67, 0x01, 0x23, 0x01, 0xef, 0x01, 0x23, 0x01, 0x67, 0x01, 0x23, 0x01, - 0xdf, 0x21, 0x02, 0x02, 0x46, 0x46, 0x02, 0x02, 0xce, 0xce, 0x02, 0x02, 0x46, 0x46, 0x02, 0x02, - 0xde, 0xde, 0x02, 0x03, 0x65, 0x47, 0x65, 0x03, 0xed, 0xcf, 0xed, 0x03, 0x65, 0x47, 0x65, 0x03, - 0x9d, 0xbf, 0x9d, 0x63, 0x04, 0x04, 0x04, 0x04, 0x8c, 0x8c, 0x8c, 0x8c, 0x04, 0x04, 0x04, 0x04, - 0x9c, 0x9c, 0x9c, 0x9c, 0x04, 0x05, 0x27, 0x05, 0xeb, 0x8d, 0xaf, 0x8d, 0xeb, 0x05, 0x27, 0x05, - 0xdb, 0xbd, 0x9f, 0xbd, 0xdb, 0x25, 0x06, 0x06, 0xca, 0xca, 0x8e, 0x8e, 0xca, 0xca, 0x06, 0x06, - 0xda, 0xda, 0x9e, 0x9e, 0xda, 0xda, 0x06, 0x07, 0xe9, 0xcb, 0xe9, 0x8f, 0xe9, 0xcb, 0xe9, 0x07, - 0x19, 0x3b, 0x19, 0x7f, 0x19, 0x3b, 0x19, 0xe7, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, - 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x08, 0x09, 0x2b, 0x09, 0x6f, 0x09, 0x2b, 0x09, - 0xd7, 0x39, 0x1b, 0x39, 0x5f, 0x39, 0x1b, 0x39, 0xd7, 0x29, 0x0a, 0x0a, 0x4e, 0x4e, 0x0a, 0x0a, - 0xd6, 0xd6, 0x1a, 0x1a, 0x5e, 0x5e, 0x1a, 0x1a, 0xd6, 0xd6, 0x0a, 0x0b, 0x6d, 0x4f, 0x6d, 0x0b, - 0x95, 0xb7, 0x95, 0x7b, 0x1d, 0x3f, 0x1d, 0x7b, 0x95, 0xb7, 0x95, 0x6b, 0x0c, 0x0c, 0x0c, 0x0c, - 0x94, 0x94, 0x94, 0x94, 0x1c, 0x1c, 0x1c, 0x1c, 0x94, 0x94, 0x94, 0x94, 0x0c, 0x0d, 0x2f, 0x0d, - 0xd3, 0xb5, 0x97, 0xb5, 0xd3, 0x3d, 0x1f, 0x3d, 0xd3, 0xb5, 0x97, 0xb5, 0xd3, 0x2d, 0x0e, 0x0e, - 0xd2, 0xd2, 0x96, 0x96, 0xd2, 0xd2, 0x1e, 0x1e, 0xd2, 0xd2, 0x96, 0x96, 0xd2, 0xd2, 0x0e, 0x0f, - 0x00, 0x22, 0x00, 0x66, 0x00, 0x22, 0x00, 0xee, 0x00, 0x22, 0x00, 0x66, 0x00, 0x22, 0x00, 0xfe, -} - -var kgmMaskTable3 = [...]byte{ - 0xB8, 0xD5, 0x3D, 0xB2, 0xE9, 0xAF, 0x78, 0x8C, 0x83, 0x33, 0x71, 0x51, 0x76, 0xA0, 0xCD, 0x37, - 0x2F, 0x3E, 0x35, 0x8D, 0xA9, 0xBE, 0x98, 0xB7, 0xE7, 0x8C, 0x22, 0xCE, 0x5A, 0x61, 0xDF, 0x68, - 0x69, 0x89, 0xFE, 0xA5, 0xB6, 0xDE, 0xA9, 0x77, 0xFC, 0xC8, 0xBD, 0xBD, 0xE5, 0x6D, 0x3E, 0x5A, - 0x36, 0xEF, 0x69, 0x4E, 0xBE, 0xE1, 0xE9, 0x66, 0x1C, 0xF3, 0xD9, 0x02, 0xB6, 0xF2, 0x12, 0x9B, - 0x44, 0xD0, 0x6F, 0xB9, 0x35, 0x89, 0xB6, 0x46, 0x6D, 0x73, 0x82, 0x06, 0x69, 0xC1, 0xED, 0xD7, - 0x85, 0xC2, 0x30, 0xDF, 0xA2, 0x62, 0xBE, 0x79, 0x2D, 0x62, 0x62, 0x3D, 0x0D, 0x7E, 0xBE, 0x48, - 0x89, 0x23, 0x02, 0xA0, 0xE4, 0xD5, 0x75, 0x51, 0x32, 0x02, 0x53, 0xFD, 0x16, 0x3A, 0x21, 0x3B, - 0x16, 0x0F, 0xC3, 0xB2, 0xBB, 0xB3, 0xE2, 0xBA, 0x3A, 0x3D, 0x13, 0xEC, 0xF6, 0x01, 0x45, 0x84, - 0xA5, 0x70, 0x0F, 0x93, 0x49, 0x0C, 0x64, 0xCD, 0x31, 0xD5, 0xCC, 0x4C, 0x07, 0x01, 0x9E, 0x00, - 0x1A, 0x23, 0x90, 0xBF, 0x88, 0x1E, 0x3B, 0xAB, 0xA6, 0x3E, 0xC4, 0x73, 0x47, 0x10, 0x7E, 0x3B, - 0x5E, 0xBC, 0xE3, 0x00, 0x84, 0xFF, 0x09, 0xD4, 0xE0, 0x89, 0x0F, 0x5B, 0x58, 0x70, 0x4F, 0xFB, - 0x65, 0xD8, 0x5C, 0x53, 0x1B, 0xD3, 0xC8, 0xC6, 0xBF, 0xEF, 0x98, 0xB0, 0x50, 0x4F, 0x0F, 0xEA, - 0xE5, 0x83, 0x58, 0x8C, 0x28, 0x2C, 0x84, 0x67, 0xCD, 0xD0, 0x9E, 0x47, 0xDB, 0x27, 0x50, 0xCA, - 0xF4, 0x63, 0x63, 0xE8, 0x97, 0x7F, 0x1B, 0x4B, 0x0C, 0xC2, 0xC1, 0x21, 0x4C, 0xCC, 0x58, 0xF5, - 0x94, 0x52, 0xA3, 0xF3, 0xD3, 0xE0, 0x68, 0xF4, 0x00, 0x23, 0xF3, 0x5E, 0x0A, 0x7B, 0x93, 0xDD, - 0xAB, 0x12, 0xB2, 0x13, 0xE8, 0x84, 0xD7, 0xA7, 0x9F, 0x0F, 0x32, 0x4C, 0x55, 0x1D, 0x04, 0x36, - 0x52, 0xDC, 0x03, 0xF3, 0xF9, 0x4E, 0x42, 0xE9, 0x3D, 0x61, 0xEF, 0x7C, 0xB6, 0xB3, 0x93, 0x50, -} - -func getKgmMask(i int) byte { - offset := i >> 4 - value := byte(0) - for offset >= 17 { - value ^= kgmMaskTable1[offset%(16*17)] - offset = offset >> 4 - value ^= kgmMaskTable2[offset%(16*17)] - offset = offset >> 4 - } - - return kgmMaskTable3[i%(16*17)] ^ value -} - -var vprMaskDiffKgm = []byte{ - 0x75, 0x2F, 0x68, 0xC6, 0x25, 0xFE, 0x25, 0xEE, - 0xDF, 0x80, 0xC3, 0xFD, 0x38, 0xD6, 0xD3, 0x01, - 0x00, -} - -func getVprMask(i int) byte { - return vprMaskDiffKgm[i%17] ^ getKgmMask(i) -} diff --git a/go.mod b/go.mod index 5326dd1..aa5e8a5 100644 --- a/go.mod +++ b/go.mod @@ -3,15 +3,15 @@ module github.com/unlock-music/cli go 1.17 require ( - github.com/ulikunitz/xz v0.5.10 - github.com/urfave/cli/v2 v2.3.0 - go.uber.org/zap v1.19.1 - golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550 + github.com/urfave/cli/v2 v2.23.5 + go.uber.org/zap v1.23.0 + golang.org/x/crypto v0.3.0 ) require ( - github.com/cpuguy83/go-md2man/v2 v2.0.1 // indirect + github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect github.com/russross/blackfriday/v2 v2.1.0 // indirect - go.uber.org/atomic v1.9.0 // indirect - go.uber.org/multierr v1.7.0 // indirect + github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect + go.uber.org/atomic v1.10.0 // indirect + go.uber.org/multierr v1.8.0 // indirect ) diff --git a/go.sum b/go.sum index 9f00169..9905ee6 100644 --- a/go.sum +++ b/go.sum @@ -1,9 +1,8 @@ -github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +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 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU= -github.com/cpuguy83/go-md2man/v2 v2.0.1 h1:r/myEWzV9lfsM1tFLgDyu0atFtJ1fXn261LKYj/3DxU= -github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o= +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= @@ -14,60 +13,76 @@ 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 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM= 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/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc= 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