forked from Mirrors/oauth2
37 lines
963 B
Go
37 lines
963 B
Go
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// Copyright 2014 The oauth2 Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package internal
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import (
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"crypto/rsa"
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"crypto/x509"
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"encoding/pem"
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"errors"
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)
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// ParseKey converts the binary contents of a private key file
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// to an *rsa.PrivateKey. It detects whether the private key is in a
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// PEM container or not. If so, it extracts the the private key
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// from PEM container before conversion. It only supports PEM
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// containers with no passphrase.
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func ParseKey(key []byte) (*rsa.PrivateKey, error) {
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block, _ := pem.Decode(key)
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if block != nil {
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key = block.Bytes
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}
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parsedKey, err := x509.ParsePKCS8PrivateKey(key)
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if err != nil {
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parsedKey, err = x509.ParsePKCS1PrivateKey(key)
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if err != nil {
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return nil, err
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}
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}
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parsed, ok := parsedKey.(*rsa.PrivateKey)
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if !ok {
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return nil, errors.New("oauth2: private key is invalid")
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}
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return parsed, nil
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}
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