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cmd_generate.go
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cmd_generate.go
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package main
import (
"crypto/rand"
"encoding/base64"
"encoding/hex"
"os"
"strconv"
"github.com/sagernet/sing-box/log"
"github.com/gofrs/uuid/v5"
"github.com/spf13/cobra"
)
var commandGenerate = &cobra.Command{
Use: "generate",
Short: "Generate things",
}
func init() {
commandGenerate.AddCommand(commandGenerateUUID)
commandGenerate.AddCommand(commandGenerateRandom)
mainCommand.AddCommand(commandGenerate)
}
var (
outputBase64 bool
outputHex bool
)
var commandGenerateRandom = &cobra.Command{
Use: "rand <length>",
Short: "Generate random bytes",
Args: cobra.ExactArgs(1),
Run: func(cmd *cobra.Command, args []string) {
err := generateRandom(args)
if err != nil {
log.Fatal(err)
}
},
}
func init() {
commandGenerateRandom.Flags().BoolVar(&outputBase64, "base64", false, "Generate base64 string")
commandGenerateRandom.Flags().BoolVar(&outputHex, "hex", false, "Generate hex string")
}
func generateRandom(args []string) error {
length, err := strconv.Atoi(args[0])
if err != nil {
return err
}
randomBytes := make([]byte, length)
_, err = rand.Read(randomBytes)
if err != nil {
return err
}
if outputBase64 {
_, err = os.Stdout.WriteString(base64.StdEncoding.EncodeToString(randomBytes) + "\n")
} else if outputHex {
_, err = os.Stdout.WriteString(hex.EncodeToString(randomBytes) + "\n")
} else {
_, err = os.Stdout.Write(randomBytes)
}
return err
}
var commandGenerateUUID = &cobra.Command{
Use: "uuid",
Short: "Generate UUID string",
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, args []string) {
err := generateUUID()
if err != nil {
log.Fatal(err)
}
},
}
func generateUUID() error {
newUUID, err := uuid.NewV4()
if err != nil {
return err
}
_, err = os.Stdout.WriteString(newUUID.String() + "\n")
return err
}