mirror of
https://github.com/mudler/luet.git
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79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
// Copyright © 2019 Ettore Di Giacinto <mudler@gentoo.org>
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//
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// This program 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 2 of the License, or
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// (at your option) any later version.
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//
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// This program 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 along
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// with this program; if not, see <http://www.gnu.org/licenses/>.
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package compiler
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import (
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//"strconv"
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"crypto/sha256"
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"fmt"
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"hash"
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"io"
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"os"
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// . "github.com/mudler/luet/pkg/logger"
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"github.com/pkg/errors"
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)
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type HashImplementation string
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const (
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SHA256 HashImplementation = "sha256"
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)
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type Checksums map[string]string
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type HashOptions struct {
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Hasher hash.Hash
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Type HashImplementation
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}
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// Generate generates all Checksums supported for the artifact
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func (c *Checksums) Generate(a Artifact) error {
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return c.generateSHA256(a)
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}
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func (c Checksums) Compare(d Checksums) error {
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for t, sum := range d {
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if v, ok := c[t]; ok && v != sum {
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return errors.New("Checksum mismsatch")
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}
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}
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return nil
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}
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func (c *Checksums) generateSHA256(a Artifact) error {
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return c.generateSum(a, HashOptions{Hasher: sha256.New(), Type: SHA256})
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}
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func (c *Checksums) generateSum(a Artifact, opts HashOptions) error {
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f, err := os.Open(a.GetPath())
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if err != nil {
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return err
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}
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defer f.Close()
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if _, err := io.Copy(opts.Hasher, f); err != nil {
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return err
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}
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sum := fmt.Sprintf("%x", opts.Hasher.Sum(nil))
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(*c)[string(opts.Type)] = sum
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return nil
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}
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