2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
3 Copyright (C) 2016-2023 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 // NNCP configuration file encrypter/decrypter.
29 xdr "github.com/davecgh/go-xdr/xdr2"
30 "go.cypherpunks.ru/nncp/v8"
31 "golang.org/x/crypto/blake2b"
36 fmt.Fprint(os.Stderr, nncp.UsageHeader())
37 fmt.Fprint(os.Stderr, "nncp-cfgenc -- encrypt/decrypt configuration file\n\n")
38 fmt.Fprintf(os.Stderr, "Usage: %s [options] cfg.hjson > cfg.hjson.eblob\n", os.Args[0])
39 fmt.Fprintf(os.Stderr, " %s [options] -d cfg.hjson.eblob > cfg.hjson\n", os.Args[0])
40 fmt.Fprintf(os.Stderr, " %s [options] -dump cfg.hjson.eblob\n", os.Args[0])
41 fmt.Fprintln(os.Stderr, "Options:")
47 decrypt = flag.Bool("d", false, "Decrypt the file")
48 dump = flag.Bool("dump", false, "Print human-readable eblob information")
49 sOpt = flag.Int("s", nncp.DefaultS, "Balloon space cost, in 32 bytes chunks")
50 tOpt = flag.Int("t", nncp.DefaultT, "Balloon time cost, number of rounds")
51 pOpt = flag.Int("p", nncp.DefaultP, "Balloon number of parallel jobs")
52 version = flag.Bool("version", false, "Print version information")
53 warranty = flag.Bool("warranty", false, "Print warranty information")
55 log.SetFlags(log.Lshortfile)
59 fmt.Println(nncp.Warranty)
63 fmt.Println(nncp.VersionGet())
72 data, err := os.ReadFile(flag.Arg(0))
74 log.Fatalln("Can not read data:", err)
78 if _, err := xdr.Unmarshal(bytes.NewReader(data), &eblob); err != nil {
82 case nncp.MagicNNCPBv1.B:
83 log.Fatalln(nncp.MagicNNCPBv1.TooOld())
84 case nncp.MagicNNCPBv2.B:
85 log.Fatalln(nncp.MagicNNCPBv2.TooOld())
86 case nncp.MagicNNCPBv3.B:
88 log.Fatalln(errors.New("Unknown eblob type"))
90 fmt.Println("Strengthening function: Balloon with BLAKE2b-256")
91 fmt.Printf("Memory space cost: %d bytes\n", eblob.SCost*blake2b.Size256)
92 fmt.Printf("Number of rounds: %d\n", eblob.TCost)
93 fmt.Printf("Number of parallel jobs: %d\n", eblob.PCost)
94 fmt.Printf("Blob size: %d\n", len(eblob.Blob))
98 os.Stderr.WriteString("Passphrase:")
99 password1, err := term.ReadPassword(0)
104 cfgRaw, err := nncp.DeEBlob(data, password1)
108 os.Stdout.Write(cfgRaw)
111 os.Stderr.WriteString("\nRepeat passphrase:")
112 password2, err := term.ReadPassword(0)
116 os.Stderr.WriteString("\n")
117 if !bytes.Equal(password1, password2) {
118 log.Fatalln(errors.New("Passphrases do not match"))
120 eblob, err := nncp.NewEBlob(*sOpt, *tOpt, *pOpt, password1, data)
124 os.Stdout.Write(eblob)