internal static byte[] GetHashProperty(SafeCspHashHandle hashHandle, HashProperty property)
{
Contract.Assert(hashHandle != null && !hashHandle.IsInvalid, "keyHandle != null && !keyHandle.IsInvalid");
int bufferSize = 0;
byte[] buffer = null;
// Figure out how big of a buffer we need to hold the property
if (!UnsafeNativeMethods.CryptGetHashParam(hashHandle, property, buffer, ref bufferSize, 0))
{
int errorCode = Marshal.GetLastWin32Error();
if (errorCode != (int)ErrorCode.MoreData)
{
throw new CryptographicException(errorCode);
}
}
// Now get the property bytes directly
buffer = new byte[bufferSize];
if (!UnsafeNativeMethods.CryptGetHashParam(hashHandle, property, buffer, ref bufferSize, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(buffer);
}
internal static void SetHashProperty(SafeCspHashHandle hashHandle,
HashProperty property,
byte[] value)
{
Contract.Assert(hashHandle != null && !hashHandle.IsInvalid, "hashHandle != null && !hashHandle.IsInvalid");
if (!UnsafeNativeMethods.CryptSetHashParam(hashHandle, property, value, 0))
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
}
internal static int GetHashPropertyInt32(SafeCspHashHandle hashHandle, HashProperty property)
{
byte[] rawProperty = GetHashProperty(hashHandle, property);
Contract.Assert(rawProperty.Length == sizeof(int) || rawProperty.Length == 0, "Unexpected property size");
return(rawProperty.Length == sizeof(int) ? BitConverter.ToInt32(rawProperty, 0) : 0);
}
internal static extern bool CryptSetHashParam(SafeCspHashHandle hHash,
HashProperty dwParam,
[In, MarshalAs(UnmanagedType.LPArray)] byte[] pbData,
int dwFlags);
internal static void SetHashProperty(SafeCspHashHandle hashHandle,
HashProperty property,
byte[] value) {
Contract.Assert(hashHandle != null && !hashHandle.IsInvalid, "hashHandle != null && !hashHandle.IsInvalid");
if (!UnsafeNativeMethods.CryptSetHashParam(hashHandle, property, value, 0)) {
throw new CryptographicException(Marshal.GetLastWin32Error());
}
}
internal static byte[] GetHashProperty(SafeCspHashHandle hashHandle, HashProperty property) {
Contract.Assert(hashHandle != null && !hashHandle.IsInvalid, "keyHandle != null && !keyHandle.IsInvalid");
int bufferSize = 0;
byte[] buffer = null;
// Figure out how big of a buffer we need to hold the property
if (!UnsafeNativeMethods.CryptGetHashParam(hashHandle, property, buffer, ref bufferSize, 0)) {
int errorCode = Marshal.GetLastWin32Error();
if (errorCode != (int)ErrorCode.MoreData) {
throw new CryptographicException(errorCode);
}
}
// Now get the property bytes directly
buffer = new byte[bufferSize];
if (!UnsafeNativeMethods.CryptGetHashParam(hashHandle, property, buffer, ref bufferSize, 0)) {
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return buffer;
}
internal static int GetHashPropertyInt32(SafeCspHashHandle hashHandle, HashProperty property) {
byte[] rawProperty = GetHashProperty(hashHandle, property);
Contract.Assert(rawProperty.Length == sizeof(int) || rawProperty.Length == 0, "Unexpected property size");
return rawProperty.Length == sizeof(int) ? BitConverter.ToInt32(rawProperty, 0) : 0;
}
internal static extern bool CryptSetHashParam(SafeCspHashHandle hHash,
HashProperty dwParam,
[In, MarshalAs(UnmanagedType.LPArray)] byte[] pbData,
int dwFlags);
