// NewIpfsReader wraps the raw-data reader `r` and returns a Reader
// that yields the clear data, if `key` is correct.
func NewIpfsReader(key []byte, r Reader) (Reader, error) {
rEnc, err := encrypt.NewReader(r, key)
if err != nil {
return nil, err
}
rZip := compress.NewReader(rEnc)
return reader{
Reader: rZip,
Seeker: rZip,
WriterTo: rZip,
Closer: ioutil.NopCloser(rZip),
}, nil
}
func main() {
opts := parseFlags()
if len(opts.args) != 1 {
dieWithUsage()
}
if opts.compress && opts.decompress {
dieWithUsage()
}
if !opts.compress && !opts.decompress {
dieWithUsage()
}
srcPath := opts.args[0]
algo, err := compress.FromString(opts.algo)
if err != nil {
die(err)
}
src := openSrc(srcPath)
defer src.Close()
dstPath := dstFilename(opts.compress, srcPath, opts.algo)
if opts.useDevNull {
dstPath = os.DevNull
}
dst := openDst(dstPath, opts.forceDstOverwrite)
defer dst.Close()
pass, err := pwd.PromptPassword()
if err != nil {
die(err)
}
key := derivateAesKey([]byte(pass), nil, 32)
if key == nil {
die(err)
}
fmt.Println("Processing...")
nBytes := int64(0)
elapsed := withTime(func() {
if opts.compress {
ew, err := encrypt.NewWriter(dst, key)
if err != nil {
die(err)
}
zw, err := compress.NewWriter(ew, algo)
if err != nil {
die(err)
}
nBytes, err = io.Copy(zw, src)
if err != nil {
die(err)
}
if err := zw.Close(); err != nil {
die(err)
}
if err := ew.Close(); err != nil {
die(err)
}
}
if opts.decompress {
er, err := encrypt.NewReader(src, key)
if err != nil {
die(err)
}
zr := compress.NewReader(er)
nBytes, err = io.Copy(dst, zr)
if err != nil {
die(err)
}
}
})
fmt.Printf(
"%s created, %s processed in %.2f seconds.\n",
dstPath, humanize.Bytes(uint64(nBytes)), elapsed.Seconds(),
)
}
func main() {
opts := parseFlags()
if len(opts.args) != 1 {
dieWithUsage()
}
if opts.compress && opts.decompress {
dieWithUsage()
}
if !opts.compress && !opts.decompress {
dieWithUsage()
}
srcPath := opts.args[0]
algo, err := compress.FromString(opts.algo)
if err != nil {
die(err)
}
src := openSrc(srcPath)
defer src.Close()
dstPath := dstFilename(opts.compress, srcPath, opts.algo)
if opts.useDevNull {
dstPath = os.DevNull
}
dst := openDst(dstPath, opts.forceDstOverwrite)
defer dst.Close()
key := derivateAesKey([]byte("defaultpassword"), nil, 32)
if key == nil {
die(err)
}
var chiper uint16 = aeadCipherAES
if opts.encalgo == "chacha" {
chiper = aeadCipherChaCha
}
if opts.encalgo == "aes" {
chiper = aeadCipherAES
}
if opts.encalgo == "none" {
opts.encrypt = false
}
if opts.compress {
ew := io.WriteCloser(dst)
if opts.encrypt {
ew, err = encrypt.NewWriterWithTypeAndBlockSize(dst, key, chiper, opts.maxblocksize)
if err != nil {
die(err)
}
}
zw, err := compress.NewWriter(ew, algo)
if err != nil {
die(err)
}
_, err = io.Copy(zw, src)
if err != nil {
die(err)
}
if err := zw.Close(); err != nil {
die(err)
}
if err := ew.Close(); err != nil {
die(err)
}
}
if opts.decompress {
var reader io.ReadSeeker = src
if opts.encrypt {
er, err := encrypt.NewReader(src, key)
if err != nil {
die(err)
}
reader = er
}
zr := compress.NewReader(reader)
_, err = io.Copy(dst, zr)
if err != nil {
die(err)
}
}
}
