internal static extern ErrorCode BCryptExportKey([In] SafeBCryptKeyHandle hKey,
[In] IntPtr hExportKey,
[In][MarshalAs(UnmanagedType.LPWStr)] string pszBlobType,
[Out, MarshalAs(UnmanagedType.LPArray)] byte[] pbOutput,
[In] int cbOutput,
[In] ref int pcbResult,
[In] int dwFlags);
internal static extern ErrorCode BCryptImportKey(
SafeBCryptAlgorithmHandle hAlgorithm,
IntPtr hImportKey,
string pszBlobType,
out SafeBCryptKeyHandle hKey,
IntPtr pbKeyObject,
int cbKeyObject,
byte[] pbInput,
int cbInput,
int dwFlags);
public static extern unsafe ErrorCode BCryptDecrypt(
SafeBCryptKeyHandle hKey,
byte *pbInput,
int cbInput,
IntPtr paddingInfo,
[In, Out] byte[] pbIV,
int cbIV,
byte *pbOutput,
int cbOutput,
out int cbResult,
int dwFlags);
public static int BCryptDecrypt(
SafeBCryptKeyHandle hKey,
byte[] input,
int inputOffset,
int inputCount,
byte[] iv,
byte[] output,
int outputOffset,
int outputCount)
{
Debug.Assert(input != null);
Debug.Assert(inputOffset >= 0);
Debug.Assert(inputCount >= 0);
Debug.Assert(inputCount <= input.Length - inputOffset);
Debug.Assert(output != null);
Debug.Assert(outputOffset >= 0);
Debug.Assert(outputCount >= 0);
Debug.Assert(outputCount <= output.Length - outputOffset);
unsafe
{
fixed(byte *pbInput = input)
{
fixed(byte *pbOutput = output)
{
int cbResult;
ErrorCode error = UnsafeNativeMethods.BCryptDecrypt(
hKey,
pbInput inputOffset,
inputCount,
IntPtr.Zero,
iv,
iv == null ? 0 : iv.Length,
pbOutput outputOffset,
outputCount,
out cbResult,
0);
if (error != ErrorCode.Success)
{
throw new CryptographicException((int)error);
}
return(cbResult);
}
}
}
}
internal static SafeBCryptKeyHandle ImportAsymmetricPublicKey(X509Native.CERT_PUBLIC_KEY_INFO certPublicKeyInfo, int dwFlag)
{
SafeBCryptKeyHandle keyHandle = null;
int error = UnsafeNativeMethods.CryptImportPublicKeyInfoEx2(
X509Native.X509_ASN_ENCODING,
ref certPublicKeyInfo,
dwFlag,
IntPtr.Zero,
out keyHandle);
if (error == 0)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(keyHandle);
}
internal static byte[] ExportBCryptKey(SafeBCryptKeyHandle hKey, string blobType)
{
byte[] keyBlob = null;
int length = 0;
ErrorCode error = UnsafeNativeMethods.BCryptExportKey(hKey, IntPtr.Zero, blobType, null, 0, ref length, 0);
if (error != ErrorCode.BufferToSmall && error != ErrorCode.Success)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
keyBlob = new byte[length];
error = UnsafeNativeMethods.BCryptExportKey(hKey, IntPtr.Zero, blobType, keyBlob, length, ref length, 0);
if (error != ErrorCode.Success)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(keyBlob);
}
internal static extern int CryptImportPublicKeyInfoEx2([In] uint dwCertEncodingType,
[In] ref X509Native.CERT_PUBLIC_KEY_INFO pInfo,
[In] int dwFlags,
[In] IntPtr pvAuxInfo,
[Out] out SafeBCryptKeyHandle phKey);
internal static extern ErrorCode BCryptGetProperty(SafeBCryptKeyHandle hObject,
string pszProperty,
[MarshalAs(UnmanagedType.LPArray), In, Out] byte[] pbOutput,
int cbOutput,
[Out] out int pcbResult,
int flags);
