package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"os"

	"git.sigsum.org/sigsum-lib-go/pkg/hex"
)

func decodeHexFromStdin() ([]byte, error) {
	b, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		return nil, fmt.Errorf("failed reading stdin: %v", err)
	}

	b, err = hex.Deserialize(string(bytes.TrimSpace(b)))
	if err != nil {
		return nil, fmt.Errorf("invalid private key: %v", err)
	}

	return b, nil
}