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
|
package cosign
import (
"bytes"
"fmt"
"git.sigsum.org/sigsum-go/pkg/hex"
"git.sigsum.org/sigsum-go/pkg/types"
"git.sigsum.org/sigsum-tools-go/internal/util"
)
func Main(_ []string, optPriv, optPub string) error {
priv, err := util.SignerFromHex(optPriv)
if err != nil {
return fmt.Errorf("cosign: %v", err)
}
b, err := hex.Deserialize(optPub)
if err != nil {
return fmt.Errorf("cosign: %v", err)
}
if len(b) != types.PublicKeySize {
return fmt.Errorf("cosign: invalid public key length %d", len(b))
}
var pub types.PublicKey
copy(pub[:], b)
data, err := util.BytesFromStdin()
if err != nil {
return fmt.Errorf("cosign: %v", err)
}
var sth types.SignedTreeHead
if err := sth.FromASCII(bytes.NewBuffer(data)); err != nil {
return fmt.Errorf("cosign: %v", err)
}
witSTH, err := sth.TreeHead.Sign(priv, types.HashFn(pub[:]))
if err != nil {
return fmt.Errorf("cosign: %v", err)
}
fmt.Printf("%s\n", hex.Serialize(witSTH.Signature[:]))
return nil
}
|
