static CspCNGCollection m_enumcngprovs()
{
UInt32 pImplCount = 0;
IntPtr ppImplList = IntPtr.Zero;
IntPtr phProvider = IntPtr.Zero;
StringBuilder SB = new StringBuilder();
Hashtable interfaces = get_interfaces();
CspCNGCollection csps = new CspCNGCollection();
UInt32 retn = nCrypt.NCryptEnumStorageProviders(ref pImplCount, ref ppImplList, 0);
if (retn != 0)
{
throw new Win32Exception(unchecked ((Int32)retn));
}
IntPtr pvInput = ppImplList;
for (Int32 index = 0; index < pImplCount; index++)
{
nCrypt2.NCryptProviderName Name =
(nCrypt2.NCryptProviderName)Marshal.PtrToStructure(ppImplList, typeof(nCrypt2.NCryptProviderName));
ppImplList = (IntPtr)((UInt64)ppImplList + (UInt32)Marshal.SizeOf(typeof(nCrypt2.NCryptProviderName)));
SB.Append(Name.pszName + ",");
}
String[] names = SB.ToString().Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
nCrypt.NCryptFreeBuffer(pvInput);
foreach (String pszProviderName in names)
{
ALG_ID_CNGCollection algs = new ALG_ID_CNGCollection();
retn = nCrypt.NCryptOpenStorageProvider(ref phProvider, pszProviderName, 0);
if (retn == 0)
{
Int32 pdwAlgCount = 0;
IntPtr ppAlgList = IntPtr.Zero;
retn = nCrypt.NCryptEnumAlgorithms(phProvider, 0, ref pdwAlgCount, ref ppAlgList, 0);
if (retn != 0)
{
throw new Win32Exception(unchecked ((Int32)retn));
}
pvInput = ppAlgList;
for (Int32 index = 0; index < pdwAlgCount; index++)
{
nCrypt2.NCryptAlgorithmName AlgId =
(nCrypt2.NCryptAlgorithmName)Marshal.PtrToStructure(ppAlgList, typeof(nCrypt2.NCryptAlgorithmName));
algs.Add(get_cngalgparams(AlgId, interfaces));
ppAlgList = (IntPtr)((UInt64)ppAlgList + (UInt32)Marshal.SizeOf(typeof(nCrypt2.NCryptAlgorithmName)));
}
nCrypt.NCryptFreeBuffer(pvInput);
}
csps.Add(new CspCNG(pszProviderName, String.Empty, algs));
}
return(csps);
}
internal CspCNGCollectionEnumerator(CspCNGCollection entries)
{
m_entries = entries;
m_current = -1;
}