// 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)
}
// 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
}