// ParsePrivateKeyPEM parses and returns a PEM-encoded private
// key. The private key may be either an unencrypted PKCS#8, PKCS#1,
// or elliptic private key.
func ParsePrivateKeyPEM(keyPEM []byte) (key crypto.Signer, err error) {
keyDER, err := GetKeyDERFromPEM(keyPEM)
if err != nil {
return nil, err
}
return derhelpers.ParsePrivateKeyDER(keyDER)
}
// LoadKey attempts to load a private key from PEM or DER.
func LoadKey(in []byte) (priv crypto.Signer, err error) {
priv, err = helpers.ParsePrivateKeyPEM(in)
if err == nil {
return priv, nil
}
return derhelpers.ParsePrivateKeyDER(in)
}
// Take in either two or one safeBags and return the certificates and or
// Private key within the bags
func parseBags(bags []safeBag, password []byte) (certs []*x509.Certificate, key crypto.Signer, err error) {
for _, bag := range bags {
bagid := bag.ID.String()
switch bagid {
case certBagID:
var CertBag certBag
if _, err = asn1.Unmarshal(bag.Value.Bytes, &CertBag); err != nil {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
certs, err = x509.ParseCertificates(CertBag.Data)
if err != nil {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
case pkcs8ShroudedBagID:
var pkinfo encryptedPrivateKeyInfo
if _, err := asn1.Unmarshal(bag.Value.Bytes, &pkinfo); err != nil {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
pkDecrypted, err := decrypt(pkinfo.AlgorithmIdentifier, pkinfo.EncryptedData, password)
if err != nil {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
// Checking if private key data has been properly decoded
var rv asn1.RawValue
if _, err = asn1.Unmarshal(pkDecrypted, &rv); err != nil {
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, err)
}
if key, err = derhelpers.ParsePrivateKeyDER(pkDecrypted); err != nil {
return nil, nil, err
}
default:
return nil, nil, cferr.Wrap(cferr.CertificateError, cferr.ParseFailed, errors.New("Only support for certificate bags and PKCS #8 Shrouded Bags"))
}
}
return certs, key, nil
}
func parsePrivateKeySpec(spec string, cfg map[string]string) (crypto.Signer, error) {
specURL, err := url.Parse(spec)
if err != nil {
return nil, err
}
var priv crypto.Signer
switch specURL.Scheme {
case "file":
// A file spec will be parsed such that the root
// directory of a relative path will be stored as the
// hostname, and the remainder of the file's path is
// stored in the Path field.
log.Debug("loading private key file", specURL.Path)
path := filepath.Join(specURL.Host, specURL.Path)
in, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
log.Debug("attempting to load PEM-encoded private key")
priv, err = helpers.ParsePrivateKeyPEM(in)
if err != nil {
log.Debug("file is not a PEM-encoded private key")
log.Debug("attempting to load DER-encoded private key")
priv, err = derhelpers.ParsePrivateKeyDER(in)
if err != nil {
return nil, err
}
}
log.Debug("loaded private key")
return priv, nil
case "rofile":
log.Warning("Red October support is currently experimental")
path := filepath.Join(specURL.Host, specURL.Path)
in, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
roServer := cfg["ro_server"]
if roServer == "" {
return nil, errors.New("config: no RedOctober server available")
}
// roCAPath can be empty; if it is, the client uses
// the system default CA roots.
roCAPath := cfg["ro_ca"]
roUser := cfg["ro_user"]
if roUser == "" {
return nil, errors.New("config: no RedOctober user available")
}
roPass := cfg["ro_pass"]
if roPass == "" {
return nil, errors.New("config: no RedOctober passphrase available")
}
log.Debug("decrypting key via RedOctober Server")
roClient, err := client.NewRemoteServer(roServer, roCAPath)
if err != nil {
return nil, err
}
req := core.DecryptRequest{
Name: roUser,
Password: roPass,
Data: in,
}
in, err = roClient.DecryptIntoData(req)
if err != nil {
return nil, err
}
return priv, nil
default:
return nil, ErrUnsupportedScheme
}
}