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blob.go
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blob.go
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// Copyright 2023 WeFuzz Research and Development B.V.
//
// 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 signature
import (
"crypto/ed25519"
"fmt"
"os"
"path/filepath"
"github.com/ant4g0nist/chronometry/pkg/core/report"
"github.com/fatih/color"
)
/*
This function is used to generate a signed, crymessage to be posted on
the Trillian data store. It takes a target file as input
*/
func GenerateMessage(targetFile string, publicKey ed25519.PublicKey, privateKey ed25519.PrivateKey, showAuthor bool) SignerBlob {
color.Green("⌛️Generating signed blob for %s", targetFile)
// load the report
rep, err := report.LoadReport(filepath.Clean(targetFile))
if err != nil {
color.Red("Failed to load report: %s LoadReport(): %s", targetFile, err)
os.Exit(1)
}
// Sign the message and generate a signed blob
signedBlob := SignReport(rep, publicKey, privateKey, showAuthor)
color.Green("✅Signed blob generated successfully")
return signedBlob
}
/*
This function is used to load a file from the local file system.
It takes a file reference as input and returns the file contents as a byte array
*/
func LoadFile(fileRef string) ([]byte, error) {
var raw []byte
// check if the file exists
if _, err := os.Stat(fileRef); os.IsNotExist(err) {
return nil, err
}
// check if the file is a directory or a file
if info, err := os.Stat(fileRef); err == nil && info.IsDir() {
// read the directory
return nil, fmt.Errorf("fileRef is a directory")
} else {
// read the file
raw, err = os.ReadFile(filepath.Clean(fileRef))
if err != nil {
return nil, err
}
}
return raw, nil
}