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85 lines
2.5 KiB
85 lines
2.5 KiB
// Copyright (c) 2022 Proton Technologies AG |
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// |
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// This file is part of ProtonMail Bridge. |
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// |
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// ProtonMail Bridge is free software: you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation, either version 3 of the License, or |
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// (at your option) any later version. |
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// |
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// ProtonMail Bridge is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// |
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// You should have received a copy of the GNU General Public License |
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>. |
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package sum |
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import ( |
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"crypto/sha512" |
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"encoding/base64" |
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"io" |
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"os" |
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"path/filepath" |
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"github.com/sirupsen/logrus" |
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) |
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// RecursiveSum computes the sha512 sum of all files in the root directory and descendents. |
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// If a skipFile is provided (e.g. the path of a checksum file relative to |
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// rootDir), it (and its signature) is ignored. |
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func RecursiveSum(rootDir, skipFileName string) ([]byte, error) { |
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hash := sha512.New() |
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// In windows filepath accepts both delimiters `\` and `/`. In order to |
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// to properly skip file we have to choose one native delimiter. |
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rootDir = filepath.FromSlash(rootDir) |
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skipFile := filepath.Join(rootDir, skipFileName) |
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skipFileSig := skipFile + ".sig" |
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if err := filepath.Walk(rootDir, func(path string, info os.FileInfo, err error) error { |
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log := logrus. |
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WithField("path", path). |
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WithField("sum", base64.StdEncoding.EncodeToString(hash.Sum([]byte{}))) |
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log.Debug("Next file") |
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if err != nil { |
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log.WithError(err).Error("Walk failed") |
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return err |
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} |
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if info.IsDir() { |
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log.Debug("Skip dir") |
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return nil |
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} |
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// The hashfile itself isn't included in the hash. |
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if path == skipFile || path == skipFileSig { |
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log.Debug("Skip file") |
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return nil |
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} |
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rel, err := filepath.Rel(rootDir, path) |
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if err != nil { |
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log.WithError(err).Error("Failed to find relative path") |
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return err |
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} |
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if _, err := hash.Write([]byte(rel)); err != nil { |
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log.WithError(err).Error("Failed to write path") |
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return err |
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} |
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f, err := os.Open(path) // nolint[gosec] |
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if err != nil { |
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log.WithError(err).Error("Failed to open file") |
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return err |
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} |
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if _, err := io.Copy(hash, f); err != nil { |
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log.WithError(err).Error("Copy to hash failed") |
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return err |
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} |
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return f.Close() |
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}); err != nil { |
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return nil, err |
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} |
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return hash.Sum([]byte{}), nil |
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}
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