static CspCollection m_enumprovs()
{
Hashtable ProvTypes = get_provtypes();
StringBuilder pszProvName = new StringBuilder();
CspCollection csps = new CspCollection();
UInt32 dwIndex = 0;
UInt32 pdwProvType = 0;
UInt32 pcbProvName = 0;
while (AdvAPI.CryptEnumProviders(dwIndex, 0, 0, ref pdwProvType, null, ref pcbProvName))
{
pszProvName.Length = (Int32)pcbProvName;
// retrieve CSP
if (!AdvAPI.CryptEnumProviders(dwIndex++, 0, 0, ref pdwProvType, pszProvName, ref pcbProvName))
{
throw new Win32Exception(Error.InvalidDataException);
}
String name = pszProvName.ToString();
String pType = (String)ProvTypes[pdwProvType];
IntPtr phProv = IntPtr.Zero;
// retrieve CSP context
if (!AdvAPI.CryptAcquireContext(ref phProv, null, name, pdwProvType, Wincrypt.CRYPT_VERIFYCONTEXT))
{
throw new Win32Exception(Error.InavlidHandleException);
}
Int32 pdwDataLen = 0;
ALG_IDCollection algs = new ALG_IDCollection();
if (AdvAPI.CryptGetProvParam(phProv, 0x16, null, ref pdwDataLen, Wincrypt.CRYPT_FIRST))
{
Byte[] pbData = new Byte[Marshal.SizeOf(typeof(Wincrypt.PROV_ENUMALGS_EX))];
while (AdvAPI.CryptGetProvParam(phProv, 0x16, pbData, ref pdwDataLen, Wincrypt.CRYPT_NEXT))
{
IntPtr ptr = Marshal.AllocHGlobal(pbData.Length);
Marshal.Copy(pbData, 0, ptr, pbData.Length);
Wincrypt.PROV_ENUMALGS_EX AlgStructure =
(Wincrypt.PROV_ENUMALGS_EX)Marshal.PtrToStructure(ptr, typeof(Wincrypt.PROV_ENUMALGS_EX));
Marshal.FreeHGlobal(ptr);
ALG_ID alg = get_algparams(AlgStructure);
algs.Add(alg);
}
csps.Add(new CspLegacy(name, pType, algs));
}
else
{
csps.Add(new CspLegacy(name, pType, algs));
}
AdvAPI.CryptReleaseContext(phProv, 0);
}
return(csps);
}
static Boolean deleteLegacyKey(AsymmetricAlgorithm privateKey)
{
if (privateKey == null)
{
return(false);
}
String keyContainer;
String provName;
UInt32 provType;
switch (privateKey)
{
case RSACryptoServiceProvider rsaProv:
keyContainer = rsaProv.CspKeyContainerInfo.KeyContainerName;
provName = rsaProv.CspKeyContainerInfo.ProviderName;
provType = (UInt32)rsaProv.CspKeyContainerInfo.ProviderType;
break;
case DSACryptoServiceProvider dsaProv:
keyContainer = dsaProv.CspKeyContainerInfo.KeyContainerName;
provName = dsaProv.CspKeyContainerInfo.ProviderName;
provType = (UInt32)dsaProv.CspKeyContainerInfo.ProviderType;
break;
default:
privateKey.Dispose();
return(false);
}
IntPtr phProv = IntPtr.Zero;
Boolean status2 = false;
Boolean status1 = AdvAPI.CryptAcquireContext(
ref phProv,
keyContainer,
provName,
provType,
Wincrypt.CRYPT_DELETEKEYSET | nCrypt2.NCRYPT_MACHINE_KEY_FLAG);
if (!status1)
{
status2 = AdvAPI.CryptAcquireContext(
ref phProv,
keyContainer,
provName,
provType,
Wincrypt.CRYPT_DELETEKEYSET);
}
privateKey.Dispose();
return(status1 || status2);
}
