/
main.go
165 lines (149 loc) · 3.41 KB
/
main.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/base32"
"encoding/base64"
"encoding/hex"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"sort"
"strings"
"github.com/33cn/chain33/wallet/bipwallet/basen"
)
var decoder = flag.String("decode", "none", "input decoding method")
var encoder = flag.String("encode", "none", "output encoding method")
var help = flag.Bool("help", false, "show help")
type codec struct {
label string
raw bool
EncodeToString func([]byte) string
DecodeString func(string) ([]byte, error)
}
var codecs = map[string]codec{
"none": {
label: "No encoding, raw binary",
raw: true,
EncodeToString: func(b []byte) string { return string(b) },
DecodeString: func(s string) ([]byte, error) { return []byte(s), nil },
},
"16": {
EncodeToString: hex.EncodeToString,
DecodeString: hex.DecodeString,
},
"32": {
EncodeToString: base32.StdEncoding.EncodeToString,
DecodeString: base32.StdEncoding.DecodeString,
},
"32hex": {
label: "Base 32 \"Extended Hex Alphabet\"",
EncodeToString: base32.HexEncoding.EncodeToString,
DecodeString: base32.HexEncoding.DecodeString,
},
"58": {
EncodeToString: basen.Base58.EncodeToString,
DecodeString: basen.Base58.DecodeString,
},
"62": {
EncodeToString: basen.Base62.EncodeToString,
DecodeString: basen.Base62.DecodeString,
},
"64": {
EncodeToString: base64.StdEncoding.EncodeToString,
DecodeString: base64.StdEncoding.DecodeString,
},
"64url": {
label: "Base 64 alternate URL encoding",
EncodeToString: base64.URLEncoding.EncodeToString,
DecodeString: base64.URLEncoding.DecodeString,
},
}
func init() {
var ok bool
codecs["raw"], ok = codecs["none"]
if !ok {
panic("missing codec 'none'")
}
codecs["hex"], ok = codecs["16"]
if !ok {
panic("missing codec '16'")
}
}
func die(err error) {
if err != nil {
log.Println(err)
os.Exit(1)
}
os.Exit(0)
}
func showCodecs() {
var lines []string
log.Printf("supported codecs:")
log.Printf("% 10s %s", "codec", "description")
log.Printf("----------- -------------------------------------------------------------")
for k, v := range codecs {
if v.label == "" {
lines = append(lines, fmt.Sprintf("% 10s: base %s", k, k))
} else {
lines = append(lines, fmt.Sprintf("% 10s: %s", k, v.label))
}
}
sort.Strings(lines)
for _, line := range lines {
log.Println(line)
}
}
func main() {
log.SetFlags(0)
log.SetPrefix("basen: ")
flag.Parse()
if *help {
showCodecs()
flag.PrintDefaults()
die(nil)
}
var input io.Reader
if flag.NArg() > 0 {
f, err := os.Open(flag.Arg(0))
if err != nil {
die(err)
}
defer f.Close()
input = f
} else {
input = os.Stdin
}
inCodec, ok := codecs[*decoder]
if !ok {
showCodecs()
die(fmt.Errorf("unsupported codec: %q", *decoder))
}
outCodec, ok := codecs[*encoder]
if !ok {
showCodecs()
die(fmt.Errorf("unsupported codec: %q", *encoder))
}
inputBuf, err := ioutil.ReadAll(input)
if err != nil {
die(err)
}
inputStr := string(inputBuf)
if !inCodec.raw {
inputStr = strings.TrimSpace(inputStr)
}
contents, err := inCodec.DecodeString(inputStr)
if err != nil {
die(err)
}
outputStr := outCodec.EncodeToString(contents)
fmt.Print(outputStr)
if !outCodec.raw {
fmt.Print("\n")
}
die(nil)
}