/
public.go
62 lines (51 loc) · 1.33 KB
/
public.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
56
57
58
59
60
61
62
package parse
import (
"crypto/ecdsa"
stdEd25519 "crypto/ed25519"
"encoding/pem"
"strings"
circlx448 "github.com/cloudflare/circl/sign/ed448"
"github.com/go-compile/rome"
"github.com/go-compile/rome/derbytes"
"github.com/go-compile/rome/ed25519"
"github.com/go-compile/rome/ed448"
)
// Public takes input as a PEM encoded ASN.1 DER bytes public key
func Public(pemPub []byte) (rome.PublicKey, error) {
p, _ := pem.Decode(pemPub)
if p == nil {
return nil, rome.ErrInvalidPem
}
switch strings.ToUpper(p.Type) {
case "EC PUBLIC KEY":
return rome.ParseECPublicASN1(p.Bytes)
case "ED PUBLIC KEY":
pub, err := derbytes.ParsePKIXPublicKey(p.Bytes)
if err != nil {
return nil, err
}
switch x := pub.(type) {
case circlx448.PublicKey:
return ed448.PublicFrom(x), nil
case stdEd25519.PublicKey:
return ed25519.PublicFrom(x), nil
}
}
return nil, rome.ErrWrongKey
}
// PublicASN1 takes input as a ASN.1 DER bytes public key
func PublicASN1(derBytes []byte) (rome.PublicKey, error) {
pub, err := derbytes.ParsePKIXPublicKey(derBytes)
if err != nil {
return nil, err
}
switch x := pub.(type) {
case circlx448.PublicKey:
return ed448.PublicFrom(x), nil
case stdEd25519.PublicKey:
return ed25519.PublicFrom(x), nil
case *ecdsa.PublicKey:
return rome.ParseECPublicASN1(derBytes)
}
return nil, rome.ErrWrongKey
}