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// package fmtio provides basic utilities to format input and output
package fmtio
import (
"bytes"
"crypto"
"crypto/ed25519"
"fmt"
"io/ioutil"
"os"
"git.sigsum.org/sigsum-go/pkg/hex"
"git.sigsum.org/sigsum-go/pkg/merkle"
"git.sigsum.org/sigsum-go/pkg/types"
)
func BytesFromStdin() ([]byte, error) {
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return nil, err
}
return b, nil
}
// StringFromStdin reads bytes from stdin, parsing them as a string without
// leading and trailing white space
func StringFromStdin() (string, error) {
b, err := ioutil.ReadAll(os.Stdin)
if err != nil {
return "", err
}
return string(bytes.TrimSpace(b)), nil
}
func SignerFromHex(s string) (crypto.Signer, error) {
b, err := hex.Deserialize(s)
if err != nil {
return nil, err
}
if n := len(b); n != ed25519.SeedSize {
return nil, fmt.Errorf("invalid size %d", n)
}
return ed25519.NewKeyFromSeed(b), nil
}
func PublicKeyFromHex(s string) (pub types.PublicKey, err error) {
b, err := hex.Deserialize(s)
if err != nil {
return pub, err
}
if n := len(b); n != types.PublicKeySize {
return pub, fmt.Errorf("invalid size %d", n)
}
copy(pub[:], b)
return
}
func HashFromHex(s string) (h merkle.Hash, err error) {
b, err := hex.Deserialize(s)
if err != nil {
return h, err
}
if n := len(b); n != merkle.HashSize {
return h, fmt.Errorf("invalid size %d", n)
}
copy(h[:], b)
return
}
func SignatureFromHex(s string) (sig types.Signature, err error) {
b, err := hex.Deserialize(s)
if err != nil {
return sig, err
}
if n := len(b); n != types.SignatureSize {
return sig, fmt.Errorf("invalid size %d", n)
}
copy(sig[:], b)
return
}
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