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
|
package examples_test
import (
"crypto/rand"
"crypto/rsa"
"fmt"
"os"
"github.com/lestrrat-go/jwx/v2/internal/json"
"github.com/lestrrat-go/jwx/v2/jwa"
"github.com/lestrrat-go/jwx/v2/jwe"
)
func Example_jwe_sign_with_headers() {
privkey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
fmt.Printf("failed to create private key: %s\n", err)
return
}
const payload = "Lorem ipsum"
hdrs := jwe.NewHeaders()
hdrs.Set(`x-example`, true)
encrypted, err := jwe.Encrypt([]byte(payload), jwe.WithKey(jwa.RSA_OAEP, privkey.PublicKey, jwe.WithPerRecipientHeaders(hdrs)))
if err != nil {
fmt.Printf("failed to encrypt payload: %s\n", err)
return
}
msg, err := jwe.Parse(encrypted)
if err != nil {
fmt.Printf("failed to parse message: %s\n", err)
return
}
// NOTE: This is a bit tricky. Even though we specified a per-recipient
// header when executing jwe.Encrypt, the headers end up being in the
// global protected headers section. This is... by the books. JWE
// in Compact serialization asks us to shove the per-recipient
// headers in the protected header section, because there is nowhere
// else to store this information.
//
// If this were a full JWE JSON message, you might have to juggle
// between the global protected headers, global unprotected headers,
// and per-recipient unprotected headers
json.NewEncoder(os.Stdout).Encode(msg.ProtectedHeaders())
// OUTPUT:
// {"alg":"RSA-OAEP","enc":"A256GCM","x-example":true}
}
|
