diff options
Diffstat (limited to 'src/crypto/x509/pkcs8.go')
-rw-r--r-- | src/crypto/x509/pkcs8.go | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/crypto/x509/pkcs8.go b/src/crypto/x509/pkcs8.go new file mode 100644 index 000000000..ba19989cb --- /dev/null +++ b/src/crypto/x509/pkcs8.go @@ -0,0 +1,54 @@ +// 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 +// and RFC5208. +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 and RFC5208. +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(oidPublicKeyRSA): + key, err = ParsePKCS1PrivateKey(privKey.PrivateKey) + if err != nil { + return nil, errors.New("x509: failed to parse RSA private key embedded in PKCS#8: " + err.Error()) + } + return key, nil + + case privKey.Algo.Algorithm.Equal(oidPublicKeyECDSA): + bytes := privKey.Algo.Parameters.FullBytes + namedCurveOID := new(asn1.ObjectIdentifier) + if _, err := asn1.Unmarshal(bytes, namedCurveOID); err != nil { + namedCurveOID = nil + } + key, err = parseECPrivateKey(namedCurveOID, privKey.PrivateKey) + if err != nil { + return nil, errors.New("x509: failed to parse EC private key embedded in PKCS#8: " + err.Error()) + } + return key, nil + + default: + return nil, fmt.Errorf("x509: PKCS#8 wrapping contained private key with unknown algorithm: %v", privKey.Algo.Algorithm) + } +} |