private CapiNative.CRYPT_OID_INFO ToOidInfo()
{
CapiNative.CRYPT_OID_INFO oidInfo = new CapiNative.CRYPT_OID_INFO();
oidInfo.cbSize = Marshal.SizeOf(typeof(CapiNative.CRYPT_OID_INFO));
oidInfo.pszOID = m_oid;
oidInfo.pwszName = m_name;
oidInfo.dwGroupId = m_group;
if (m_algorithmId.HasValue)
{
oidInfo.dwValue = m_algorithmId.Value;
}
if (m_cngAlgorithm != null)
{
oidInfo.pwszCNGAlgid = m_cngAlgorithm.Algorithm;
}
if (m_cngExtraAlgorithm != null)
{
oidInfo.pwszCNGExtraAlgid = m_cngExtraAlgorithm.Algorithm;
}
return(oidInfo);
}
/// <summary>
/// Unpack a CAPI CRYPT_OID_INFO structure into an Oid2
/// </summary>
private Oid2(CapiNative.CRYPT_OID_INFO oidInfo)
{
m_oid = oidInfo.pszOID ?? String.Empty;
m_name = oidInfo.pwszName ?? String.Empty;
m_group = oidInfo.dwGroupId;
// Algorithm information is only set for specific OID groups
if (oidInfo.dwGroupId == OidGroup.EncryptionAlgorithm ||
oidInfo.dwGroupId == OidGroup.HashAlgorithm ||
oidInfo.dwGroupId == OidGroup.PublicKeyAlgorithm ||
oidInfo.dwGroupId == OidGroup.SignatureAlgorithm)
{
// Values of 0 or -1 indicate that there is no CAPI algorithm mapping
if (oidInfo.dwValue != 0 && oidInfo.dwValue != -1)
{
m_algorithmId = oidInfo.dwValue;
}
if (!String.IsNullOrEmpty(oidInfo.pwszCNGAlgid))
{
m_cngAlgorithm = new CngAlgorithm(oidInfo.pwszCNGAlgid);
}
if (!String.IsNullOrEmpty(oidInfo.pwszCNGExtraAlgid))
{
m_cngExtraAlgorithm = new CngAlgorithm(oidInfo.pwszCNGExtraAlgid);
}
}
}
public static Oid2 FindByValue(string oid, OidGroup group, bool useNetworkLookup)
{
CapiNative.CRYPT_OID_INFO oidInfo = new CapiNative.CRYPT_OID_INFO();
if (CapiNative.TryFindOidInfo(oid, group, CapiNative.OidKeyType.Oid, useNetworkLookup, out oidInfo))
{
return(new Oid2(oidInfo));
}
else
{
return(null);
}
}