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); }