99 lines
2.0 KiB
Go
99 lines
2.0 KiB
Go
// Copyright (C) 2018 Storj Labs, Inc.
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// See LICENSE for copying information.
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package main
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import (
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"context"
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"crypto/sha256"
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"flag"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"github.com/vivint/infectious"
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"storj.io/storj/pkg/eestream"
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)
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var (
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erasureShareSize = flag.Int("erasure_share_size", 4*1024, "block size of pieces")
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key = flag.String("key", "a key", "the secret key")
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rsk = flag.Int("required", 20, "rs required")
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rsn = flag.Int("total", 40, "rs total")
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)
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func main() {
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flag.Parse()
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if flag.Arg(0) == "" {
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fmt.Printf("usage: cat data | %s <targetdir>\n", os.Args[0])
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os.Exit(1)
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}
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err := Main()
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if err != nil {
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fmt.Fprintf(os.Stderr, "error: %v\n", err)
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os.Exit(1)
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}
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}
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// Main is the exported CLI executable function
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func Main() error {
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err := os.MkdirAll(flag.Arg(0), 0755)
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if err != nil {
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return err
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}
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fc, err := infectious.NewFEC(*rsk, *rsn)
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if err != nil {
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return err
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}
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es := eestream.NewRSScheme(fc, *erasureShareSize)
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rs, err := eestream.NewRedundancyStrategy(es, 0, 0)
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if err != nil {
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return err
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}
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encKey := eestream.Key(sha256.Sum256([]byte(*key)))
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var firstNonce eestream.Nonce
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cipher := eestream.AESGCM
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encrypter, err := cipher.NewEncrypter(&encKey, &firstNonce, es.StripeSize())
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if err != nil {
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return err
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}
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readers, err := eestream.EncodeReader(context.Background(),
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eestream.TransformReader(eestream.PadReader(os.Stdin,
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encrypter.InBlockSize()), encrypter, 0), rs, 4*1024*1024)
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if err != nil {
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return err
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}
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errs := make(chan error, len(readers))
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for i := range readers {
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go func(i int) {
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pieceFile := filepath.Join(flag.Arg(0), fmt.Sprintf("%d.piece", i))
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fh, err := os.Create(pieceFile)
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if err != nil {
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errs <- err
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return
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}
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defer printError(fh.Close)
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_, err = io.Copy(fh, readers[i])
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errs <- err
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}(i)
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}
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for range readers {
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err := <-errs
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if err != nil {
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return err
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}
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}
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return nil
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}
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func printError(fn func() error) {
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err := fn()
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if err != nil {
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fmt.Println(err)
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}
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}
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