2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
3 Copyright (C) 2016-2021 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 // NNCP configuration file encrypter/decrypter.
30 xdr "github.com/davecgh/go-xdr/xdr2"
31 "go.cypherpunks.ru/nncp/v7"
32 "golang.org/x/crypto/blake2b"
37 fmt.Fprintf(os.Stderr, nncp.UsageHeader())
38 fmt.Fprintf(os.Stderr, "nncp-cfgenc -- encrypt/decrypt configuration file\n\n")
39 fmt.Fprintf(os.Stderr, "Usage: %s [options] cfg.hjson > cfg.hjson.eblob\n", os.Args[0])
40 fmt.Fprintf(os.Stderr, " %s [options] -d cfg.hjson.eblob > cfg.hjson\n", os.Args[0])
41 fmt.Fprintf(os.Stderr, " %s [options] -dump cfg.hjson.eblob\n", os.Args[0])
42 fmt.Fprintln(os.Stderr, "Options:")
48 decrypt = flag.Bool("d", false, "Decrypt the file")
49 dump = flag.Bool("dump", false, "Print human-readable eblob information")
50 sOpt = flag.Int("s", nncp.DefaultS, "Balloon space cost, in 32 bytes chunks")
51 tOpt = flag.Int("t", nncp.DefaultT, "Balloon time cost, number of rounds")
52 pOpt = flag.Int("p", nncp.DefaultP, "Balloon number of parallel jobs")
53 version = flag.Bool("version", false, "Print version information")
54 warranty = flag.Bool("warranty", false, "Print warranty information")
56 log.SetFlags(log.Lshortfile)
60 fmt.Println(nncp.Warranty)
64 fmt.Println(nncp.VersionGet())
73 data, err := ioutil.ReadFile(flag.Arg(0))
75 log.Fatalln("Can not read data:", err)
79 if _, err := xdr.Unmarshal(bytes.NewReader(data), &eblob); err != nil {
83 case nncp.MagicNNCPBv1.B:
84 log.Fatalln(nncp.MagicNNCPBv1.TooOld())
85 case nncp.MagicNNCPBv2.B:
86 log.Fatalln(nncp.MagicNNCPBv2.TooOld())
87 case nncp.MagicNNCPBv3.B:
89 log.Fatalln(errors.New("Unknown eblob type"))
91 fmt.Println("Strengthening function: Balloon with BLAKE2b-256")
92 fmt.Printf("Memory space cost: %d bytes\n", eblob.SCost*blake2b.Size256)
93 fmt.Printf("Number of rounds: %d\n", eblob.TCost)
94 fmt.Printf("Number of parallel jobs: %d\n", eblob.PCost)
95 fmt.Printf("Blob size: %d\n", len(eblob.Blob))
99 os.Stderr.WriteString("Passphrase:")
100 password1, err := term.ReadPassword(0)
105 cfgRaw, err := nncp.DeEBlob(data, password1)
109 os.Stdout.Write(cfgRaw)
112 os.Stderr.WriteString("\nRepeat passphrase:")
113 password2, err := term.ReadPassword(0)
117 os.Stderr.WriteString("\n")
118 if bytes.Compare(password1, password2) != 0 {
119 log.Fatalln(errors.New("Passphrases do not match"))
121 eblob, err := nncp.NewEBlob(*sOpt, *tOpt, *pOpt, password1, data)
125 os.Stdout.Write(eblob)