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package main
import (
"crypto/rand"
"encoding/binary"
"flag"
"fmt"
"os"
"strings"
"golang.org/x/term"
"roseh.moe/cmd/sym/internal/sym"
"roseh.moe/pkg/wordlist"
)
var (
generatePassword = flag.Bool("g", false, "generate a secure password automatically (password will be printed to stderr)")
passwordFlag = flag.String("p", "", "use the specified password; if not provided, enc will prompt for a password")
asciiOutput = flag.Bool("a", false, "Output in base64, default is binary output")
)
func enc() error {
if *generatePassword && *passwordFlag != "" {
return fmt.Errorf("-g and -p cannot be used together")
}
args := flag.Args()
if len(args) == 0 && !*generatePassword && *passwordFlag == "" {
return fmt.Errorf("must use -g or -p when reading from stdin")
}
var password string
if *passwordFlag != "" {
password = *passwordFlag
} else if *generatePassword {
const nWords = 10
buf := make([]byte, 2*nWords)
rand.Read(buf)
words := make([]string, nWords)
for i := range words {
words[i] = wordlist.Words[binary.NativeEndian.Uint16(buf[2*i:])&0x1fff]
}
password = strings.Join(words, " ")
fmt.Fprintf(os.Stderr, "Your password: %s\n", password)
} else {
fmt.Fprint(os.Stderr, "Enter password: ")
pw, err := term.ReadPassword(int(os.Stdin.Fd()))
fmt.Fprintln(os.Stderr)
if err != nil {
return err
}
password = string(pw)
}
salt := make([]byte, sym.SaltSize)
rand.Read(salt)
key, err := sym.HashPassword(password, salt)
if err != nil {
return err
}
if len(args) == 0 {
if *asciiOutput {
return sym.EncryptBase64(os.Stdout, os.Stdin, key, salt, 0)
}
return sym.Encrypt(os.Stdout, os.Stdin, key, salt, 0)
}
for i, fileName := range args {
if err := sym.EncryptFile(fileName, key, salt, i, *asciiOutput); err != nil {
return err
}
}
return nil
}
func main() {
flag.Parse()
if err := enc(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
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