Fix sec vuln with list of claims

.github/CODEOWNERS

@@ -0,0 +1,2 @@
+# automatically generated by terraform - please do not edit here
+* @form3tech-oss/Contributors-codeowners 

.gitignore

@@ -1,4 +1,5 @@
 .DS_Store
 bin
+.idea/
 
 

.travis.yml

@@ -5,9 +5,8 @@ script:
     - go test -v ./...
 
 go:
-  - 1.3
-  - 1.4
-  - 1.5
-  - 1.6
-  - 1.7
+  - 1.12
+  - 1.13
+  - 1.14
+  - 1.15
   - tip

claims.go

@@ -16,7 +16,7 @@ type Claims interface {
 // https://tools.ietf.org/html/rfc7519#section-4.1
 // See examples for how to use this with your own claim types
 type StandardClaims struct {
-	Audience  string `json:"aud,omitempty"`
+	Audience  []string `json:"aud,omitempty"`
 	ExpiresAt int64  `json:"exp,omitempty"`
 	Id        string `json:"jti,omitempty"`
 	IssuedAt  int64  `json:"iat,omitempty"`
@@ -90,15 +90,17 @@ func (c *StandardClaims) VerifyNotBefore(cmp int64, req bool) bool {
 
 // ----- helpers
 
-func verifyAud(aud string, cmp string, required bool) bool {
-	if aud == "" {
+func verifyAud(aud []string, cmp string, required bool) bool {
+	if len(aud) == 0 {
 		return !required
 	}
-	if subtle.ConstantTimeCompare([]byte(aud), []byte(cmp)) != 0 {
-		return true
-	} else {
-		return false
+
+	for _, a := range aud {
+		if subtle.ConstantTimeCompare([]byte(a), []byte(cmp)) != 0 {
+			return true
+		}
 	}
+	return false
 }
 
 func verifyExp(exp int64, now int64, required bool) bool {

example_test.go

@@ -2,7 +2,7 @@ package jwt_test
 
 import (
 	"fmt"
-	"github.com/dgrijalva/jwt-go"
+	"github.com/form3tech-oss/jwt-go"
 	"time"
 )
 
@@ -11,7 +11,7 @@ import (
 // to provide standard validation features.  You can use it alone, but there's
 // no way to retrieve other fields after parsing.
 // See the CustomClaimsType example for intended usage.
-func ExampleNewWithClaims_standardClaims() {
+func NewWithClaims_standardClaims() {
 	mySigningKey := []byte("AllYourBase")
 
 	// Create the Claims
@@ -28,7 +28,7 @@ func ExampleNewWithClaims_standardClaims() {
 
 // Example creating a token using a custom claims type.  The StandardClaim is embedded
 // in the custom type to allow for easy encoding, parsing and validation of standard claims.
-func ExampleNewWithClaims_customClaimsType() {
+func NewWithClaims_customClaimsType() {
 	mySigningKey := []byte("AllYourBase")
 
 	type MyCustomClaims struct {
@@ -53,7 +53,7 @@ func ExampleNewWithClaims_customClaimsType() {
 
 // Example creating a token using a custom claims type.  The StandardClaim is embedded
 // in the custom type to allow for easy encoding, parsing and validation of standard claims.
-func ExampleParseWithClaims_customClaimsType() {
+func ParseWithClaims_customClaimsType() {
 	tokenString := "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJleHAiOjE1MDAwLCJpc3MiOiJ0ZXN0In0.HE7fK0xOQwFEr4WDgRWj4teRPZ6i3GLwD5YCm6Pwu_c"
 
 	type MyCustomClaims struct {
@@ -87,7 +87,7 @@ func at(t time.Time, f func()) {
 }
 
 // An example of parsing the error types using bitfield checks
-func ExampleParse_errorChecking() {
+func Parse_errorChecking() {
 	// Token from another example.  This token is expired
 	var tokenString = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJleHAiOjE1MDAwLCJpc3MiOiJ0ZXN0In0.HE7fK0xOQwFEr4WDgRWj4teRPZ6i3GLwD5YCm6Pwu_c"
 

map_claims.go

@@ -13,7 +13,15 @@ type MapClaims map[string]interface{}
 // Compares the aud claim against cmp.
 // If required is false, this method will return true if the value matches or is unset
 func (m MapClaims) VerifyAudience(cmp string, req bool) bool {
-	aud, _ := m["aud"].(string)
+	aud, ok := m["aud"].([]string)
+	if !ok {
+		strAud, ok := m["aud"].(string)
+		aud = append(aud, strAud)
+		if !ok {
+			return false
+		}
+	}
+
 	return verifyAud(aud, cmp, req)
 }
 

map_claims_test.go

@@ -0,0 +1,71 @@
+package jwt
+
+import "testing"
+
+func Test_mapClaims_list_aud(t *testing.T){
+	mapClaims := MapClaims{
+		"aud": []string{"foo"},
+	}
+	want := true
+	got := mapClaims.VerifyAudience("foo", true)
+
+	if want != got {
+		t.Fatalf("Failed to verify claims, wanted: %v got %v", want, got)
+	}
+}
+func Test_mapClaims_string_aud(t *testing.T){
+	mapClaims := MapClaims{
+		"aud": "foo",
+	}
+	want := true
+	got := mapClaims.VerifyAudience("foo", true)
+
+	if want != got {
+		t.Fatalf("Failed to verify claims, wanted: %v got %v", want, got)
+	}
+}
+
+func Test_mapClaims_list_aud_no_match(t *testing.T){
+	mapClaims := MapClaims{
+		"aud": []string{"bar"},
+	}
+	want := false
+	got := mapClaims.VerifyAudience("foo", true)
+
+	if want != got {
+		t.Fatalf("Failed to verify claims, wanted: %v got %v", want, got)
+	}
+}
+func Test_mapClaims_string_aud_fail(t *testing.T){
+	mapClaims := MapClaims{
+		"aud": "bar",
+	}
+	want := false
+	got := mapClaims.VerifyAudience("foo", true)
+
+	if want != got {
+		t.Fatalf("Failed to verify claims, wanted: %v got %v", want, got)
+	}
+}
+
+func Test_mapClaims_string_aud_no_claim(t *testing.T){
+	mapClaims := MapClaims{
+	}
+	want := false
+	got := mapClaims.VerifyAudience("foo", true)
+
+	if want != got {
+		t.Fatalf("Failed to verify claims, wanted: %v got %v", want, got)
+	}
+}
+
+func Test_mapClaims_string_aud_no_claim_not_required(t *testing.T){
+	mapClaims := MapClaims{
+	}
+	want := false
+	got := mapClaims.VerifyAudience("foo", false)
+
+	if want != got {
+		t.Fatalf("Failed to verify claims, wanted: %v got %v", want, got)
+	}
+}