424 lines
10 KiB
Go
424 lines
10 KiB
Go
/*-
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* Copyright 2014 Square Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package jose
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/rand"
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"encoding/json"
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"fmt"
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"io"
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"testing"
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)
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type staticNonceSource string
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func (sns staticNonceSource) Nonce() (string, error) {
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return string(sns), nil
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}
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func RoundtripJWS(sigAlg SignatureAlgorithm, serializer func(*JsonWebSignature) (string, error), corrupter func(*JsonWebSignature), signingKey interface{}, verificationKey interface{}, nonce string) error {
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signer, err := NewSigner(sigAlg, signingKey)
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if err != nil {
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return fmt.Errorf("error on new signer: %s", err)
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}
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if nonce != "" {
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signer.SetNonceSource(staticNonceSource(nonce))
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}
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input := []byte("Lorem ipsum dolor sit amet")
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obj, err := signer.Sign(input)
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if err != nil {
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return fmt.Errorf("error on sign: %s", err)
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}
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msg, err := serializer(obj)
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if err != nil {
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return fmt.Errorf("error on serialize: %s", err)
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}
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obj, err = ParseSigned(msg)
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if err != nil {
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return fmt.Errorf("error on parse: %s", err)
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}
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// (Maybe) mangle the object
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corrupter(obj)
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output, err := obj.Verify(verificationKey)
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if err != nil {
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return fmt.Errorf("error on verify: %s", err)
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}
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// Check that verify works with embedded keys (if present)
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for i, sig := range obj.Signatures {
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if sig.Header.JsonWebKey != nil {
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_, err = obj.Verify(sig.Header.JsonWebKey)
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if err != nil {
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return fmt.Errorf("error on verify with embedded key %d: %s", i, err)
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}
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}
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// Check that the nonce correctly round-tripped (if present)
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if sig.Header.Nonce != nonce {
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return fmt.Errorf("Incorrect nonce returned: [%s]", sig.Header.Nonce)
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}
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}
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if bytes.Compare(output, input) != 0 {
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return fmt.Errorf("input/output do not match, got '%s', expected '%s'", output, input)
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}
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return nil
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}
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func TestRoundtripsJWS(t *testing.T) {
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// Test matrix
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sigAlgs := []SignatureAlgorithm{RS256, RS384, RS512, PS256, PS384, PS512, HS256, HS384, HS512, ES256, ES384, ES512}
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serializers := []func(*JsonWebSignature) (string, error){
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func(obj *JsonWebSignature) (string, error) { return obj.CompactSerialize() },
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func(obj *JsonWebSignature) (string, error) { return obj.FullSerialize(), nil },
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}
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corrupter := func(obj *JsonWebSignature) {}
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for _, alg := range sigAlgs {
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signingKey, verificationKey := GenerateSigningTestKey(alg)
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for i, serializer := range serializers {
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err := RoundtripJWS(alg, serializer, corrupter, signingKey, verificationKey, "test_nonce")
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if err != nil {
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t.Error(err, alg, i)
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}
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}
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}
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}
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func TestRoundtripsJWSCorruptSignature(t *testing.T) {
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// Test matrix
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sigAlgs := []SignatureAlgorithm{RS256, RS384, RS512, PS256, PS384, PS512, HS256, HS384, HS512, ES256, ES384, ES512}
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serializers := []func(*JsonWebSignature) (string, error){
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func(obj *JsonWebSignature) (string, error) { return obj.CompactSerialize() },
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func(obj *JsonWebSignature) (string, error) { return obj.FullSerialize(), nil },
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}
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corrupters := []func(*JsonWebSignature){
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func(obj *JsonWebSignature) {
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// Changes bytes in signature
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obj.Signatures[0].Signature[10]++
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},
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func(obj *JsonWebSignature) {
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// Set totally invalid signature
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obj.Signatures[0].Signature = []byte("###")
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},
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}
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// Test all different configurations
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for _, alg := range sigAlgs {
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signingKey, verificationKey := GenerateSigningTestKey(alg)
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for i, serializer := range serializers {
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for j, corrupter := range corrupters {
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err := RoundtripJWS(alg, serializer, corrupter, signingKey, verificationKey, "test_nonce")
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if err == nil {
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t.Error("failed to detect corrupt signature", err, alg, i, j)
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}
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}
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}
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}
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}
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func TestSignerWithBrokenRand(t *testing.T) {
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sigAlgs := []SignatureAlgorithm{RS256, RS384, RS512, PS256, PS384, PS512}
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serializer := func(obj *JsonWebSignature) (string, error) { return obj.CompactSerialize() }
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corrupter := func(obj *JsonWebSignature) {}
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// Break rand reader
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readers := []func() io.Reader{
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// Totally broken
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func() io.Reader { return bytes.NewReader([]byte{}) },
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// Not enough bytes
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func() io.Reader { return io.LimitReader(rand.Reader, 20) },
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}
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defer resetRandReader()
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for _, alg := range sigAlgs {
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signingKey, verificationKey := GenerateSigningTestKey(alg)
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for i, getReader := range readers {
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randReader = getReader()
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err := RoundtripJWS(alg, serializer, corrupter, signingKey, verificationKey, "test_nonce")
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if err == nil {
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t.Error("signer should fail if rand is broken", alg, i)
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}
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}
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}
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}
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func TestJWSInvalidKey(t *testing.T) {
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signingKey0, verificationKey0 := GenerateSigningTestKey(RS256)
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_, verificationKey1 := GenerateSigningTestKey(ES256)
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signer, err := NewSigner(RS256, signingKey0)
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if err != nil {
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panic(err)
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}
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input := []byte("Lorem ipsum dolor sit amet")
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obj, err := signer.Sign(input)
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if err != nil {
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panic(err)
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}
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// Must work with correct key
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_, err = obj.Verify(verificationKey0)
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if err != nil {
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t.Error("error on verify", err)
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}
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// Must not work with incorrect key
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_, err = obj.Verify(verificationKey1)
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if err == nil {
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t.Error("verification should fail with incorrect key")
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}
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// Must not work with invalid key
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_, err = obj.Verify("")
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if err == nil {
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t.Error("verification should fail with incorrect key")
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}
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}
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func TestMultiRecipientJWS(t *testing.T) {
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signer := NewMultiSigner()
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sharedKey := []byte{
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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}
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signer.AddRecipient(RS256, rsaTestKey)
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signer.AddRecipient(HS384, sharedKey)
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input := []byte("Lorem ipsum dolor sit amet")
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obj, err := signer.Sign(input)
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if err != nil {
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t.Error("error on sign: ", err)
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return
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}
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_, err = obj.CompactSerialize()
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if err == nil {
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t.Error("message with multiple recipient was compact serialized")
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}
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msg := obj.FullSerialize()
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obj, err = ParseSigned(msg)
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if err != nil {
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t.Error("error on parse: ", err)
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return
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}
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output, err := obj.Verify(&rsaTestKey.PublicKey)
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if err != nil {
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t.Error("error on verify: ", err)
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return
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}
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if bytes.Compare(output, input) != 0 {
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t.Error("input/output do not match", output, input)
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return
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}
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output, err = obj.Verify(sharedKey)
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if err != nil {
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t.Error("error on verify: ", err)
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return
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}
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if bytes.Compare(output, input) != 0 {
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t.Error("input/output do not match", output, input)
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return
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}
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}
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func GenerateSigningTestKey(sigAlg SignatureAlgorithm) (sig, ver interface{}) {
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switch sigAlg {
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case RS256, RS384, RS512, PS256, PS384, PS512:
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sig = rsaTestKey
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ver = &rsaTestKey.PublicKey
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case HS256, HS384, HS512:
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sig, _, _ = randomKeyGenerator{size: 16}.genKey()
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ver = sig
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case ES256:
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key, _ := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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sig = key
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ver = &key.PublicKey
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case ES384:
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key, _ := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
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sig = key
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ver = &key.PublicKey
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case ES512:
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key, _ := ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
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sig = key
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ver = &key.PublicKey
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default:
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panic("Must update test case")
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}
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return
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}
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func TestInvalidSignerAlg(t *testing.T) {
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_, err := NewSigner("XYZ", nil)
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if err == nil {
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t.Error("should not accept invalid algorithm")
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}
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_, err = NewSigner("XYZ", []byte{})
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if err == nil {
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t.Error("should not accept invalid algorithm")
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}
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}
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func TestInvalidJWS(t *testing.T) {
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signer, err := NewSigner(PS256, rsaTestKey)
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if err != nil {
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panic(err)
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}
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obj, err := signer.Sign([]byte("Lorem ipsum dolor sit amet"))
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obj.Signatures[0].header = &rawHeader{
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Crit: []string{"TEST"},
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}
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_, err = obj.Verify(&rsaTestKey.PublicKey)
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if err == nil {
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t.Error("should not verify message with unknown crit header")
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}
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// Try without alg header
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obj.Signatures[0].protected = &rawHeader{}
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obj.Signatures[0].header = &rawHeader{}
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_, err = obj.Verify(&rsaTestKey.PublicKey)
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if err == nil {
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t.Error("should not verify message with missing headers")
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}
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}
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func TestSignerKid(t *testing.T) {
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kid := "DEADBEEF"
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payload := []byte("Lorem ipsum dolor sit amet")
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key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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t.Error("problem generating test signing key", err)
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}
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basejwk := JsonWebKey{Key: key}
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jsonbar, err := basejwk.MarshalJSON()
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if err != nil {
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t.Error("problem marshalling base JWK", err)
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}
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var jsonmsi map[string]interface{}
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err = json.Unmarshal(jsonbar, &jsonmsi)
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if err != nil {
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t.Error("problem unmarshalling base JWK", err)
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}
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jsonmsi["kid"] = kid
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jsonbar2, err := json.Marshal(jsonmsi)
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if err != nil {
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t.Error("problem marshalling kided JWK", err)
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}
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var jwk JsonWebKey
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err = jwk.UnmarshalJSON(jsonbar2)
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if err != nil {
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t.Error("problem unmarshalling kided JWK", err)
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}
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signer, err := NewSigner(ES256, &jwk)
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if err != nil {
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t.Error("problem creating signer", err)
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}
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signed, err := signer.Sign(payload)
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serialized := signed.FullSerialize()
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parsed, err := ParseSigned(serialized)
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if err != nil {
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t.Error("problem parsing signed object", err)
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}
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if parsed.Signatures[0].Header.KeyID != kid {
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t.Error("KeyID did not survive trip")
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}
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}
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func TestEmbedJwk(t *testing.T) {
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var payload = []byte("Lorem ipsum dolor sit amet")
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key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
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if err != nil {
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t.Error("Failed to generate key")
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}
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signer, err := NewSigner(ES256, key)
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if err != nil {
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t.Error("Failed to create signer")
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}
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object, err := signer.Sign(payload)
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if err != nil {
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t.Error("Failed to sign payload")
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}
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object, err = ParseSigned(object.FullSerialize())
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if err != nil {
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t.Error("Failed to parse jws")
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}
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if object.Signatures[0].protected.Jwk == nil {
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t.Error("JWK isn't set in protected header")
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}
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// Now sign it again, but don't embed JWK.
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signer.SetEmbedJwk(false)
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object, err = signer.Sign(payload)
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if err != nil {
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t.Error("Failed to sign payload")
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}
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object, err = ParseSigned(object.FullSerialize())
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if err != nil {
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t.Error("Failed to parse jws")
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}
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if object.Signatures[0].protected.Jwk != nil {
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t.Error("JWK is set in protected header")
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}
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}
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