forked from scionproto/scion
/
human.go
82 lines (75 loc) · 2.33 KB
/
human.go
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// Copyright 2019 Anapaya Systems
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package trcs
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"github.com/scionproto/scion/go/lib/scrypto/trc/v2"
"github.com/scionproto/scion/go/lib/serrors"
)
func runHuman(files []string) error {
for _, file := range files {
if err := genHuman(file); err != nil {
return serrors.WrapStr("unable to generate human output", err, "file", file)
}
}
return nil
}
func genHuman(file string) error {
raw, err := ioutil.ReadFile(file)
if err != nil {
return err
}
var signed trc.Signed
if err := json.Unmarshal(raw, &signed); err != nil {
return serrors.WrapStr("unable to parse signed TRC", err, "file", file)
}
t, err := signed.EncodedTRC.Decode()
if err != nil {
return serrors.WrapStr("unable to parse TRC payload", err, "file", file)
}
signatures, err := parseSignatures(signed.Signatures)
if err != nil {
return serrors.WrapStr("unable to parse signatures", err, "file", file)
}
humanReadable := struct {
Payload *trc.TRC `json:"payload"`
Signatures []signature `json:"signatures"`
}{
Payload: t,
Signatures: signatures,
}
if raw, err = json.MarshalIndent(humanReadable, "", " "); err != nil {
return serrors.WrapStr("unable to write human readable trc", err, "file", file)
}
_, err = fmt.Fprintln(os.Stdout, string(raw))
return err
}
func parseSignatures(packed []trc.Signature) ([]signature, error) {
var signatures []signature
for i, s := range packed {
p, err := s.EncodedProtected.Decode()
if err != nil {
return nil, serrors.WrapStr("unable to parse protected meta", err, "idx", i)
}
signatures = append(signatures, signature{Protected: p, Signature: s.Signature})
}
return signatures, nil
}
type signature struct {
Protected trc.Protected `json:"protected"`
Signature []byte `json:"signature"`
}