internal static unsafe IntPtr CreateCryptAttributes(CryptographicAttributeObjectCollection attributes)
{
if (attributes.Count == 0)
{
return(IntPtr.Zero);
}
uint num1 = 0U;
uint num2 = PkcsUtils.AlignedLength((uint)Marshal.SizeOf(typeof(PkcsUtils.I_CRYPT_ATTRIBUTE)));
uint num3 = PkcsUtils.AlignedLength((uint)Marshal.SizeOf(typeof(CAPI.CRYPTOAPI_BLOB)));
foreach (CryptographicAttributeObject cryptographicAttributeObject in attributes)
{
num1 = num1 + num2 + PkcsUtils.AlignedLength((uint)(cryptographicAttributeObject.Oid.Value.Length + 1));
foreach (AsnEncodedData asnEncodedData in cryptographicAttributeObject.Values)
{
num1 = num1 + num3 + PkcsUtils.AlignedLength((uint)asnEncodedData.RawData.Length);
}
}
SafeLocalAllocHandle localAllocHandle = CAPI.LocalAlloc(64U, new IntPtr((long)num1));
PkcsUtils.I_CRYPT_ATTRIBUTE *iCryptAttributePtr = (PkcsUtils.I_CRYPT_ATTRIBUTE *)(void *) localAllocHandle.DangerousGetHandle();
IntPtr num4 = new IntPtr((long)localAllocHandle.DangerousGetHandle() + (long)num2 * (long)attributes.Count);
foreach (CryptographicAttributeObject cryptographicAttributeObject in attributes)
{
byte * numPtr = (byte *)(void *)num4;
byte[] numArray = new byte[cryptographicAttributeObject.Oid.Value.Length + 1];
CAPI.CRYPTOAPI_BLOB *cryptoapiBlobPtr = (CAPI.CRYPTOAPI_BLOB *)(numPtr + (int)PkcsUtils.AlignedLength((uint)numArray.Length));
iCryptAttributePtr->pszObjId = (IntPtr)((void *)numPtr);
iCryptAttributePtr->cValue = (uint)cryptographicAttributeObject.Values.Count;
iCryptAttributePtr->rgValue = (IntPtr)((void *)cryptoapiBlobPtr);
Encoding.ASCII.GetBytes(cryptographicAttributeObject.Oid.Value, 0, cryptographicAttributeObject.Oid.Value.Length, numArray, 0);
Marshal.Copy(numArray, 0, iCryptAttributePtr->pszObjId, numArray.Length);
IntPtr destination = new IntPtr((long)cryptoapiBlobPtr + (long)cryptographicAttributeObject.Values.Count * (long)num3);
foreach (AsnEncodedData asnEncodedData in cryptographicAttributeObject.Values)
{
byte[] rawData = asnEncodedData.RawData;
if (rawData.Length > 0)
{
cryptoapiBlobPtr->cbData = (uint)rawData.Length;
cryptoapiBlobPtr->pbData = destination;
Marshal.Copy(rawData, 0, destination, rawData.Length);
destination = new IntPtr((long)destination + (long)PkcsUtils.AlignedLength((uint)rawData.Length));
}
++cryptoapiBlobPtr;
}
++iCryptAttributePtr;
num4 = destination;
}
GC.SuppressFinalize((object)localAllocHandle);
return(localAllocHandle.DangerousGetHandle());
}
