add function to convert string keys

.travis.yml

@@ -2,6 +2,7 @@ sudo: false
 language: go
 go:
   - 1.8
+  - 1.8.1
 before_install:
   - go get -t -v ./...
   - go get github.com/modocache/gover

README.md

@@ -13,7 +13,7 @@ https://github.com/teambition/crypto-go
 
 ## Demo
 
-### Create a token and verify it.
+### Create a token and verify it
 
 ```go
 auther := auth.New([]byte("key1"))
@@ -23,7 +23,7 @@ fmt.Println(claims.Get("test"))
 // Output: "OK"
 ```
 
-### Use with Gear.
+### Use with Gear
 
 ```go
 package main

auth.go

@@ -9,7 +9,7 @@ import (
 )
 
 // Version ...
-const Version = "1.5.1"
+const Version = "1.5.2"
 
 // TokenExtractor is a function that takes a gear.Context as input and
 // returns either a string token or an empty string. Default to:

jwt/jwt.go

@@ -113,23 +113,23 @@ func (j *JWT) SetExpiresIn(expiresIn time.Duration) {
 // SetKeys set new keys to jwt.
 func (j *JWT) SetKeys(keys ...interface{}) {
 	if len(keys) == 0 || keys[0] == nil {
-		panic(errors.New("Invalid keys"))
+		panic(errors.New("invalid keys"))
 	}
 	j.keys = keys
 }
 
 // SetMethods set one or more signing methods which can be used rotational.
 func (j *JWT) SetMethods(method josecrypto.SigningMethod) {
 	if method == nil {
-		panic(errors.New("Invalid signing method"))
+		panic(errors.New("invalid signing method"))
 	}
 	j.method = method
 }
 
 // SetValidator set a custom jwt.Validator to jwt. Default to nil.
 func (j *JWT) SetValidator(validator *josejwt.Validator) {
 	if validator == nil {
-		panic(errors.New("Invalid validator"))
+		panic(errors.New("invalid validator"))
 	}
 	j.validator = []*josejwt.Validator{validator}
 }
@@ -185,3 +185,11 @@ func (r rotating) Verify(v func(interface{}) bool) (index int) {
 	}
 	return -1
 }
+
+// StrToKeys converts string slice to keys slice.
+func StrToKeys(keys ...string) (res []interface{}) {
+	for _, key := range keys {
+		res = append(res, []byte(key))
+	}
+	return
+}

jwt/jwt_test.go

@@ -29,7 +29,7 @@ func TestJWT(t *testing.T) {
 
 		jwter0 := New()
 		jwter1 := New([]byte("key1"))
-		jwter2 := New([]byte("key2"))
+		jwter2 := New(StrToKeys("key2")...)
 		assert.Equal(1, len(jwter1.keys))
 		assert.Equal(crypto.SigningMethodHS256, jwter1.method)