public static SafeProvHandleImpl AcquireProvider(CspParameters providerParameters)
{
var providerHandle = SafeProvHandleImpl.InvalidHandle;
var dwFlags = Constants.CRYPT_VERIFYCONTEXT;
if ((providerParameters.Flags & CspProviderFlags.UseMachineKeyStore) != CspProviderFlags.NoFlags)
{
dwFlags |= Constants.CRYPT_MACHINE_KEYSET;
}
if (!CryptoApi.CryptAcquireContext(ref providerHandle, providerParameters.KeyContainerName, providerParameters.ProviderName, (uint)providerParameters.ProviderType, dwFlags))
{
throw CreateWin32Error();
}
return(providerHandle);
}
public static int GetKeyParameterInt32(SafeKeyHandleImpl keyHandle, uint keyParamId)
{
const int doubleWordSize = 4;
uint dwDataLength = doubleWordSize;
var dwDataBytes = new byte[doubleWordSize];
if (!CryptoApi.CryptGetKeyParam(keyHandle, keyParamId, dwDataBytes, ref dwDataLength, 0))
{
throw CreateWin32Error();
}
if (dwDataLength != doubleWordSize)
{
throw ExceptionUtility.CryptographicException(Constants.NTE_BAD_DATA);
}
return(BitConverter.ToInt32(dwDataBytes, 0));
}
/// <summary>
/// Вернет список криптопровайдеров
/// </summary>
/// <returns></returns>
public static Dictionary <string, int> GetProviders()
{
Dictionary <string, int> installedCSPs = new Dictionary <string, int>();
uint cbName;
uint dwType;
uint dwIndex;
StringBuilder pszName;
dwIndex = 0;
dwType = 1;
cbName = 0;
while (CryptoApi.CryptEnumProviders(dwIndex, IntPtr.Zero, 0, ref dwType, null, ref cbName))
{
pszName = new StringBuilder((int)cbName);
if (CryptoApi.CryptEnumProviders(dwIndex++, IntPtr.Zero, 0, ref dwType, pszName, ref cbName))
{
installedCSPs.Add(pszName.ToString(), (int)dwType);
}
}
return(installedCSPs);
}
private static SafeHashHandleImpl SetupHashAlgorithm(SafeProvHandleImpl providerHandle, byte[] hashValue)
{
var hashHandle = CreateHash_3411_94(providerHandle);
uint hashLength = 0;
if (!CryptoApi.CryptGetHashParam(hashHandle, Constants.HP_HASHVAL, null, ref hashLength, 0))
{
throw CreateWin32Error();
}
if (hashValue.Length != hashLength)
{
throw ExceptionUtility.CryptographicException(Constants.NTE_BAD_HASH);
}
if (!CryptoApi.CryptSetHashParam(hashHandle, Constants.HP_HASHVAL, hashValue, 0))
{
throw CreateWin32Error();
}
return(hashHandle);
}
public static byte[] SignValue(SafeProvHandleImpl hProv, int keyNumber, byte[] hashValue)
{
using (var hashHandle = SetupHashAlgorithm(hProv, hashValue))
{
uint signatureLength = 0;
// Вычисление размера подписи
if (!CryptoApi.CryptSignHash(hashHandle, (uint)keyNumber, null, 0, null, ref signatureLength))
{
throw CreateWin32Error();
}
var signatureValue = new byte[signatureLength];
// Вычисление значения подписи
if (!CryptoApi.CryptSignHash(hashHandle, (uint)keyNumber, null, 0, signatureValue, ref signatureLength))
{
throw CreateWin32Error();
}
return(signatureValue);
}
}
public static void SetProviderParameter(SafeProvHandleImpl providerHandle, int keyNumber, uint keyParamId, IntPtr keyParamValue)
{
if ((keyParamId == Constants.PP_KEYEXCHANGE_PIN) || (keyParamId == Constants.PP_SIGNATURE_PIN))
{
if (keyNumber == Constants.AT_KEYEXCHANGE)
{
keyParamId = Constants.PP_KEYEXCHANGE_PIN;
}
else if (keyNumber == Constants.AT_SIGNATURE)
{
keyParamId = Constants.PP_SIGNATURE_PIN;
}
else
{
throw ExceptionUtility.NotSupported("KeyAlgorithmNotSupported");
}
}
if (!CryptoApi.CryptSetProvParam(providerHandle, keyParamId, keyParamValue, 0))
{
throw CreateWin32Error();
}
}
protected override bool ReleaseHandle()
{
CryptoApi.CryptDestroyHash(handle);
return(true);
}
