--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/golang.org/x/oauth2/internal/oauth2.go Sat Sep 29 18:09:54 2018 +0200
@@ -0,0 +1,37 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package internal
+
+import (
+ "crypto/rsa"
+ "crypto/x509"
+ "encoding/pem"
+ "errors"
+ "fmt"
+)
+
+// ParseKey converts the binary contents of a private key file
+// to an *rsa.PrivateKey. It detects whether the private key is in a
+// PEM container or not. If so, it extracts the the private key
+// from PEM container before conversion. It only supports PEM
+// containers with no passphrase.
+func ParseKey(key []byte) (*rsa.PrivateKey, error) {
+ block, _ := pem.Decode(key)
+ if block != nil {
+ key = block.Bytes
+ }
+ parsedKey, err := x509.ParsePKCS8PrivateKey(key)
+ if err != nil {
+ parsedKey, err = x509.ParsePKCS1PrivateKey(key)
+ if err != nil {
+ return nil, fmt.Errorf("private key should be a PEM or plain PKSC1 or PKCS8; parse error: %v", err)
+ }
+ }
+ parsed, ok := parsedKey.(*rsa.PrivateKey)
+ if !ok {
+ return nil, errors.New("private key is invalid")
+ }
+ return parsed, nil
+}