2 meta4a -- Metalink 4.0 creator
3 Copyright (C) 2021-2023 Sergey Matveev <stargrave@stargrave.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, version 3 of the License.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 // Metalink 4.0 creator
36 "go.cypherpunks.ru/gogost/v5/gost34112012256"
37 "go.cypherpunks.ru/gogost/v5/gost34112012512"
38 "go.stargrave.org/meta4ra"
41 type MultiHasher struct {
44 streebog256h hash.Hash
45 streebog512h hash.Hash
49 func NewMultiHasher() *MultiHasher {
51 sha256h: sha256.New(),
52 sha512h: sha512.New(),
53 streebog256h: gost34112012256.New(),
54 streebog512h: gost34112012512.New(),
58 func (h *MultiHasher) Write(p []byte) (n int, err error) {
61 if _, err := h.sha256h.Write(p); err != nil {
67 if _, err := h.sha512h.Write(p); err != nil {
73 if _, err := h.streebog256h.Write(p); err != nil {
79 if _, err := h.streebog512h.Write(p); err != nil {
89 file := flag.String("file", "", "Path to file")
90 mtime := flag.String("mtime", "", "Take that file's mtime as a Published date")
91 desc := flag.String("desc", "", "Description")
92 sig := flag.String("sig", "", "Path to signature file")
93 torrent := flag.String("torrent", "", "Torrent URL")
94 log.SetFlags(log.Lshortfile)
96 urls := make([]meta4ra.URL, 0, len(flag.Args()))
97 for _, u := range flag.Args() {
98 urls = append(urls, meta4ra.URL{URL: u})
100 fd, err := os.Open(*file)
108 buf := make([]byte, 1<<20)
109 h := NewMultiHasher()
110 if _, err = io.CopyBuffer(h, bufio.NewReader(fd), buf); err != nil {
114 Name: filepath.Base(*file),
116 Size: uint64(fi.Size()),
118 Hashes: []meta4ra.Hash{
119 {Type: meta4ra.HashSHA256, Hash: hex.EncodeToString(h.sha256h.Sum(nil))},
120 {Type: meta4ra.HashSHA512, Hash: hex.EncodeToString(h.sha512h.Sum(nil))},
121 {Type: meta4ra.HashStreebog256, Hash: hex.EncodeToString(h.streebog256h.Sum(nil))},
122 {Type: meta4ra.HashStreebog512, Hash: hex.EncodeToString(h.streebog512h.Sum(nil))},
126 sigData, err := os.ReadFile(*sig)
130 f.Signature = &meta4ra.Signature{
131 MediaType: meta4ra.GPGSigMediaType,
132 Signature: "\n" + string(sigData),
136 f.MetaURLs = []meta4ra.MetaURL{{MediaType: "torrent", URL: *torrent}}
138 var published time.Time
140 published = time.Now()
142 fi, err := os.Stat(*mtime)
146 published = fi.ModTime()
148 published = published.UTC().Truncate(time.Second)
149 m := meta4ra.Metalink{
150 Files: []meta4ra.File{f},
151 Generator: meta4ra.Generator,
152 Published: published,
154 out, err := xml.MarshalIndent(&m, "", " ")
158 os.Stdout.Write([]byte(xml.Header))
160 os.Stdout.Write([]byte("\n"))