forked from Silverfish/proton-bridge
86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
// Copyright (c) 2023 Proton AG
|
|
//
|
|
// This file is part of Proton Mail Bridge.
|
|
//
|
|
// Proton Mail Bridge is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// Proton Mail Bridge is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
package sum
|
|
|
|
import (
|
|
"crypto/sha512"
|
|
"encoding/base64"
|
|
"io"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
// RecursiveSum computes the sha512 sum of all files in the root directory and descendents.
|
|
// If a skipFile is provided (e.g. the path of a checksum file relative to
|
|
// rootDir), it (and its signature) is ignored.
|
|
func RecursiveSum(rootDir, skipFileName string) ([]byte, error) {
|
|
hash := sha512.New()
|
|
// In windows filepath accepts both delimiters `\` and `/`. In order to
|
|
// to properly skip file we have to choose one native delimiter.
|
|
rootDir = filepath.FromSlash(rootDir)
|
|
skipFile := filepath.Join(rootDir, skipFileName)
|
|
skipFileSig := skipFile + ".sig"
|
|
|
|
if err := filepath.Walk(rootDir, func(path string, info os.FileInfo, err error) error {
|
|
log := logrus.
|
|
WithField("path", path).
|
|
WithField("sum", base64.StdEncoding.EncodeToString(hash.Sum([]byte{})))
|
|
log.Debug("Next file")
|
|
if err != nil {
|
|
log.WithError(err).Error("Walk failed")
|
|
return err
|
|
}
|
|
if info.IsDir() {
|
|
log.Debug("Skip dir")
|
|
return nil
|
|
}
|
|
|
|
// The hashfile itself isn't included in the hash.
|
|
if path == skipFile || path == skipFileSig {
|
|
log.Debug("Skip file")
|
|
return nil
|
|
}
|
|
|
|
rel, err := filepath.Rel(rootDir, path)
|
|
if err != nil {
|
|
log.WithError(err).Error("Failed to find relative path")
|
|
return err
|
|
}
|
|
if _, err := hash.Write([]byte(rel)); err != nil {
|
|
log.WithError(err).Error("Failed to write path")
|
|
return err
|
|
}
|
|
f, err := os.Open(path) //nolint:gosec
|
|
if err != nil {
|
|
log.WithError(err).Error("Failed to open file")
|
|
return err
|
|
}
|
|
if _, err := io.Copy(hash, f); err != nil {
|
|
log.WithError(err).Error("Copy to hash failed")
|
|
return err
|
|
}
|
|
return f.Close()
|
|
}); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return hash.Sum([]byte{}), nil
|
|
}
|