/
utils.go
55 lines (46 loc) · 1.04 KB
/
utils.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
package utils
import (
"context"
"crypto/sha1"
"crypto/sha256"
"encoding/xml"
"errors"
"fmt"
"hash"
"io"
"github.com/DataDog/nikos/rpm/dnfv2/types"
)
func GetAndUnmarshalXML[T any](ctx context.Context, httpClient *HttpClient, url string, checksum *types.Checksum) (*T, error) {
content, err := httpClient.GetWithChecksum(ctx, url, checksum)
if err != nil {
return nil, err
}
contentData, err := content.Data()
if err != nil {
return nil, err
}
var res T
if err := xml.Unmarshal(contentData, &res); err != nil {
return nil, err
}
return &res, nil
}
func verifyChecksum(reader io.Reader, checksum *types.Checksum) error {
var hasher hash.Hash
switch checksum.Type {
case "sha256":
hasher = sha256.New()
case "sha1":
hasher = sha1.New()
default:
return fmt.Errorf("unsupported sha type: %s", checksum.Type)
}
if _, err := io.Copy(hasher, reader); err != nil {
return err
}
contentSum := hasher.Sum(nil)
if checksum.Hash != fmt.Sprintf("%x", contentSum) {
return errors.New("failed checksum")
}
return nil
}