protected virtual AsymmetricKeyParameter GetPublicKey()
{
if (KeyInfo == null)
{
throw new System.Security.Cryptography.CryptographicException(SR.Cryptography_Xml_KeyInfoRequired);
}
if (_x509Enum != null)
{
AsymmetricKeyParameter key = GetNextCertificatePublicKey();
if (key != null)
{
return(key);
}
}
if (_keyInfoEnum == null)
{
_keyInfoEnum = KeyInfo.GetEnumerator();
}
while (_keyInfoEnum.MoveNext())
{
RsaKeyValue rsaKeyValue = _keyInfoEnum.Current as RsaKeyValue;
if (rsaKeyValue != null)
{
return(rsaKeyValue.GetKey());
}
DsaKeyValue dsaKeyValue = _keyInfoEnum.Current as DsaKeyValue;
if (dsaKeyValue != null)
{
return(dsaKeyValue.GetKey());
}
KeyInfoX509Data x509Data = _keyInfoEnum.Current as KeyInfoX509Data;
if (x509Data != null)
{
_x509Collection = CryptoUtils.BuildBagOfCerts(x509Data, CertUsageType.Verification);
if (_x509Collection.Count > 0)
{
_x509Enum = _x509Collection.GetEnumerator();
AsymmetricKeyParameter key = GetNextCertificatePublicKey();
if (key != null)
{
return(key);
}
}
}
}
return(null);
}