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/*-
* Copyright 2018 Square Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cryptosigner
import (
"bytes"
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"fmt"
"testing"
"golang.org/x/crypto/ed25519"
"gopkg.in/square/go-jose.v2"
)
func TestRoundtripsJWSCryptoSigner(t *testing.T) {
sigAlgs := []jose.SignatureAlgorithm{jose.RS256, jose.RS384, jose.RS512, jose.PS256, jose.PS384, jose.PS512, jose.ES256, jose.ES384, jose.ES512, jose.EdDSA}
serializers := []func(*jose.JSONWebSignature) (string, error){
func(obj *jose.JSONWebSignature) (string, error) { return obj.CompactSerialize() },
func(obj *jose.JSONWebSignature) (string, error) { return obj.FullSerialize(), nil },
}
for _, alg := range sigAlgs {
signingKey, verificationKey := generateSigningTestKey(alg)
for i, serializer := range serializers {
err := roundtripJWS(alg, serializer, Opaque(signingKey.(crypto.Signer)), verificationKey)
if err != nil {
t.Error(err, alg, i)
}
}
}
}
type staticNonceSource string
func (sns staticNonceSource) Nonce() (string, error) {
return string(sns), nil
}
func roundtripJWS(sigAlg jose.SignatureAlgorithm, serializer func(*jose.JSONWebSignature) (string, error), signingKey interface{}, verificationKey interface{}) error {
nonce := "test_nonce"
opts := &jose.SignerOptions{
NonceSource: staticNonceSource(nonce),
}
signer, err := jose.NewSigner(jose.SigningKey{Algorithm: sigAlg, Key: signingKey}, opts)
if err != nil {
return fmt.Errorf("error on new signer: %s", err)
}
input := []byte("Lorem ipsum dolor sit amet")
obj, err := signer.Sign(input)
if err != nil {
return fmt.Errorf("error on sign: %s", err)
}
msg, err := serializer(obj)
if err != nil {
return fmt.Errorf("error on serialize: %s", err)
}
obj, err = jose.ParseSigned(msg)
if err != nil {
return fmt.Errorf("error on parse: %s", err)
}
output, err := obj.Verify(verificationKey)
if err != nil {
return fmt.Errorf("error on verify: %s", err)
}
// Check that verify works with embedded keys (if present)
for i, sig := range obj.Signatures {
if sig.Header.JSONWebKey != nil {
_, err = obj.Verify(sig.Header.JSONWebKey)
if err != nil {
return fmt.Errorf("error on verify with embedded key %d: %s", i, err)
}
}
// Check that the nonce correctly round-tripped (if present)
if sig.Header.Nonce != nonce {
return fmt.Errorf("Incorrect nonce returned: [%s]", sig.Header.Nonce)
}
}
if bytes.Compare(output, input) != 0 {
return fmt.Errorf("input/output do not match, got '%s', expected '%s'", output, input)
}
return nil
}
func generateSigningTestKey(sigAlg jose.SignatureAlgorithm) (sig, ver interface{}) {
switch sigAlg {
case jose.EdDSA:
ver, sig, _ = ed25519.GenerateKey(rand.Reader)
case jose.RS256, jose.RS384, jose.RS512, jose.PS256, jose.PS384, jose.PS512:
rsaTestKey, _ := rsa.GenerateKey(rand.Reader, 2048)
sig = rsaTestKey
ver = &rsaTestKey.PublicKey
case jose.ES256:
key, _ := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
sig = key
ver = &key.PublicKey
case jose.ES384:
key, _ := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
sig = key
ver = &key.PublicKey
case jose.ES512:
key, _ := ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
sig = key
ver = &key.PublicKey
default:
panic("Must update test case")
}
return
}
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