internal unsafe CryptographicAttributeObjectCollection ReadAttributes(CRYPT_ATTRIBUTES attributes)
{
var collection = new CryptographicAttributeObjectCollection();
var attributeSize = Marshal.SizeOf <CRYPT_ATTRIBUTE>();
var blobSize = Marshal.SizeOf <CRYPTOAPI_BLOB>();
for (var i = 0; i < attributes.cAttr; i++)
{
var structure = Marshal.PtrToStructure <CRYPT_ATTRIBUTE>(attributes.rgAttr + (i * attributeSize));
var asnValues = new AsnEncodedDataCollection();
for (var j = 0; j < structure.cValue; j++)
{
var blob = Marshal.PtrToStructure <CRYPTOAPI_BLOB>(structure.rgValue + j * blobSize);
asnValues.Add(new AsnEncodedData(structure.pszObjId, ReadBlob(blob)));
}
collection.Add(new CryptographicAttributeObject(new Oid(structure.pszObjId), asnValues));
}
return(collection);
}
private static unsafe CryptographicAttributeObjectCollection ToCryptographicAttributeObjectCollection(CRYPT_ATTRIBUTES* pCryptAttributes)
{
CryptographicAttributeObjectCollection collection = new CryptographicAttributeObjectCollection();
for (int i = 0; i < pCryptAttributes->cAttr; i++)
{
CRYPT_ATTRIBUTE* pCryptAttribute = &(pCryptAttributes->rgAttr[i]);
AddCryptAttribute(collection, pCryptAttribute);
}
return collection;
}
