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package util
import (
"bytes"
"crypto"
"crypto/ed25519"
"fmt"
"io/ioutil"
"os"
"git.sigsum.org/sigsum-go/pkg/hex"
"git.sigsum.org/sigsum-go/pkg/types"
)
func BytesFromStdin() ([]byte, error) {
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return nil, fmt.Errorf("util: read stdin: %v", err)
}
return b, nil
}
func HexFromStdin() ([]byte, error) {
b, err := BytesFromStdin()
if err != nil {
return nil, err
}
b, err = hex.Deserialize(string(bytes.TrimSpace(b)))
if err != nil {
return nil, fmt.Errorf("util: parse stdin: %v", err)
}
return b, nil
}
func SignerFromHex(s string) (crypto.Signer, error) {
b, err := hex.Deserialize(s)
if err != nil {
return nil, fmt.Errorf("util: parse key: %v", err)
}
if len(b) != ed25519.PrivateKeySize {
return nil, fmt.Errorf("util: invalid private key size %d", len(b))
}
return ed25519.PrivateKey(b), nil
}
func FileHash(path string) (*types.Hash, error) {
b, err := ioutil.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("util: read file %s: %v", path, err)
}
return types.HashFn(b), nil
}
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