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package main
import (
"crypto"
"bytes"
"fmt"
"io/ioutil"
"os"
"crypto/ed25519"
"git.sigsum.org/sigsum-go/pkg/hex"
)
func readStdin() ([]byte, error) {
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return nil, fmt.Errorf("stdin: %v", err)
}
return b, nil
}
func decodeHexFromStdin() ([]byte, error) {
b, err := readStdin()
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
}
func privFromHex(s string) (crypto.Signer, error) {
b, err := hex.Deserialize(optPriv)
if err != nil {
return nil, fmt.Errorf("invalid private key: %v", err)
}
if len(b) != ed25519.PrivateKeySize {
return nil, fmt.Errorf("invalid private key: size")
}
return ed25519.PrivateKey(b), nil
}
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