private static unsafe SafeLocalAllocHandle EncodePublicKey(PublicKey key)
{
SafeLocalAllocHandle publicKeyInfo = SafeLocalAllocHandle.InvalidHandle;
CAPI.CERT_PUBLIC_KEY_INFO2 *pPublicKeyInfo = null;
string objId = key.Oid.Value;
byte[] encodedParameters = key.EncodedParameters.RawData;
byte[] encodedKeyValue = key.EncodedKeyValue.RawData;
uint cbPublicKeyInfo = (uint)(Marshal.SizeOf(typeof(CAPI.CERT_PUBLIC_KEY_INFO2)) +
X509Utils.AlignedLength((uint)(objId.Length + 1)) +
X509Utils.AlignedLength((uint)encodedParameters.Length) +
encodedKeyValue.Length);
publicKeyInfo = CAPI.LocalAlloc(CAPI.LPTR, new IntPtr(cbPublicKeyInfo));
pPublicKeyInfo = (CAPI.CERT_PUBLIC_KEY_INFO2 *)publicKeyInfo.DangerousGetHandle();
IntPtr pszObjId = new IntPtr((long)pPublicKeyInfo + Marshal.SizeOf(typeof(CAPI.CERT_PUBLIC_KEY_INFO2)));
IntPtr pbParameters = new IntPtr((long)pszObjId + X509Utils.AlignedLength(((uint)(objId.Length + 1))));
IntPtr pbPublicKey = new IntPtr((long)pbParameters + X509Utils.AlignedLength((uint)encodedParameters.Length));
pPublicKeyInfo->Algorithm.pszObjId = pszObjId;
byte[] szObjId = new byte[objId.Length + 1];
Encoding.ASCII.GetBytes(objId, 0, objId.Length, szObjId, 0);
Marshal.Copy(szObjId, 0, pszObjId, szObjId.Length);
if (encodedParameters.Length > 0)
{
pPublicKeyInfo->Algorithm.Parameters.cbData = (uint)encodedParameters.Length;
pPublicKeyInfo->Algorithm.Parameters.pbData = pbParameters;
Marshal.Copy(encodedParameters, 0, pbParameters, encodedParameters.Length);
}
pPublicKeyInfo->PublicKey.cbData = (uint)encodedKeyValue.Length;
pPublicKeyInfo->PublicKey.pbData = pbPublicKey;
Marshal.Copy(encodedKeyValue, 0, pbPublicKey, encodedKeyValue.Length);
return(publicKeyInfo);
}
