Subversion Repositories openrisc

// Copyright 2011 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 x509

import (

        "crypto/x509/pkix"

        "encoding/asn1"

        "errors"

        "fmt"

)

// pkcs8 reflects an ASN.1, PKCS#8 PrivateKey. See

// ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-8/pkcs-8v1_2.asn.

type pkcs8 struct {

        Version    int

        Algo       pkix.AlgorithmIdentifier

        PrivateKey []byte

        // optional attributes omitted.

}

// ParsePKCS8PrivateKey parses an unencrypted, PKCS#8 private key. See

// http://www.rsa.com/rsalabs/node.asp?id=2130

func ParsePKCS8PrivateKey(der []byte) (key interface{}, err error) {

        var privKey pkcs8

        if _, err := asn1.Unmarshal(der, &privKey); err != nil {

                return nil, err

        }

        switch {

        case privKey.Algo.Algorithm.Equal(oidRSA):

                key, err = ParsePKCS1PrivateKey(privKey.PrivateKey)

                if err != nil {

                        return nil, errors.New("crypto/x509: failed to parse RSA private key embedded in PKCS#8: " + err.Error())

                }

                return key, nil

        default:

                return nil, fmt.Errorf("crypto/x509: PKCS#8 wrapping contained private key with unknown algorithm: %v", privKey.Algo.Algorithm)

        }

        panic("unreachable")

}