all: remove redundant type conversion

Change-Id: I4de1d39f8b72cd1116c56fb00b224a60de035f9e
GitHub-Last-Rev: 4e40ee8
GitHub-Pull-Request: golang#586
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/428982
Reviewed-by: Cody Oss <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>
Run-TryBot: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: cuishuang

google/jwt_test.go

@@ -73,7 +73,7 @@ func TestJWTAccessTokenSourceFromJSON(t *testing.T) {
 		t.Fatalf("base64 DecodeString: %v\nString: %q", err, parts[0])
 	}
 	var hdr jws.Header
-	if err := json.Unmarshal([]byte(hdrJSON), &hdr); err != nil {
+	if err := json.Unmarshal(hdrJSON, &hdr); err != nil {
 		t.Fatalf("json.Unmarshal: %v (%q)", err, hdrJSON)
 	}
 
@@ -129,7 +129,7 @@ func TestJWTAccessTokenSourceWithScope(t *testing.T) {
 		t.Fatalf("base64 DecodeString: %v\nString: %q", err, parts[0])
 	}
 	var hdr jws.Header
-	if err := json.Unmarshal([]byte(hdrJSON), &hdr); err != nil {
+	if err := json.Unmarshal(hdrJSON, &hdr); err != nil {
 		t.Fatalf("json.Unmarshal: %v (%q)", err, hdrJSON)
 	}
 

jira/jira.go

@@ -105,7 +105,7 @@ func (js jwtSource) Token() (*oauth2.Token, error) {
 	if err != nil {
 		return nil, err
 	}
-	v.Set("assertion", string(assertion))
+	v.Set("assertion", assertion)
 
 	// Fetch access token from auth server
 	hc := oauth2.NewClient(js.ctx, nil)

jws/jws.go

@@ -178,5 +178,5 @@ func Verify(token string, key *rsa.PublicKey) error {
 
 	h := sha256.New()
 	h.Write([]byte(signedContent))
-	return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), []byte(signatureString))
+	return rsa.VerifyPKCS1v15(key, crypto.SHA256, h.Sum(nil), signatureString)
 }