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
|
package data
import (
"crypto/sha256"
"encoding/hex"
"errors"
)
type HexBytes []byte
func (b *HexBytes) UnmarshalJSON(data []byte) error {
if len(data) < 2 || len(data)%2 != 0 || data[0] != '"' || data[len(data)-1] != '"' {
return errors.New("tuf: invalid JSON hex bytes")
}
res := make([]byte, hex.DecodedLen(len(data)-2))
_, err := hex.Decode(res, data[1:len(data)-1])
if err != nil {
return err
}
*b = res
return nil
}
func (b HexBytes) MarshalJSON() ([]byte, error) {
res := make([]byte, hex.EncodedLen(len(b))+2)
res[0] = '"'
res[len(res)-1] = '"'
hex.Encode(res[1:], b)
return res, nil
}
func (b HexBytes) String() string {
return hex.EncodeToString(b)
}
// 4.5. File formats: targets.json and delegated target roles:
// ...each target path, when hashed with the SHA-256 hash function to produce
// a 64-byte hexadecimal digest (HEX_DIGEST)...
func PathHexDigest(s string) string {
b := sha256.Sum256([]byte(s))
return hex.EncodeToString(b[:])
}
|
