private SecurityStatus EncryptDecryptHelper(SafeDeleteContext securityContext, byte[] buffer, int offset, int size, int headerSize, int trailerSize, bool encrypt, out int resultSize)
{
bool gotReference = false;
resultSize = 0;
try
{
securityContext.DangerousAddRef(ref gotReference);
Interop.libssl.SslErrorCode errorCode = Interop.libssl.SslErrorCode.SSL_ERROR_NONE;
unsafe
{
fixed(byte *bufferPtr = buffer)
{
IntPtr inputPtr = new IntPtr(bufferPtr);
IntPtr scHandle = securityContext.DangerousGetHandle();
resultSize = encrypt ?
Interop.OpenSsl.Encrypt(scHandle, inputPtr, offset, size, buffer.Length, out errorCode) :
Interop.OpenSsl.Decrypt(scHandle, inputPtr, size, out errorCode);
}
}
switch (errorCode)
{
case Interop.libssl.SslErrorCode.SSL_ERROR_RENEGOTIATE:
return(SecurityStatus.Renegotiate);
case Interop.libssl.SslErrorCode.SSL_ERROR_ZERO_RETURN:
return(SecurityStatus.ContextExpired);
case Interop.libssl.SslErrorCode.SSL_ERROR_NONE:
case Interop.libssl.SslErrorCode.SSL_ERROR_WANT_READ:
return(SecurityStatus.OK);
default:
return(SecurityStatus.InternalError);
}
}
catch (Exception ex)
{
Debug.Fail("Exception Caught. - " + ex);
return(SecurityStatus.InternalError);
}
finally
{
if (gotReference)
{
securityContext.DangerousRelease();
}
}
}
private static SecurityStatusPal EncryptDecryptHelper(SafeDeleteContext securityContext, byte[] buffer, int offset, int size, int headerSize, int trailerSize, bool encrypt, out int resultSize)
{
resultSize = 0;
try
{
Interop.libssl.SslErrorCode errorCode = Interop.libssl.SslErrorCode.SSL_ERROR_NONE;
unsafe
{
fixed(byte *bufferPtr = buffer)
{
IntPtr inputPtr = new IntPtr(bufferPtr);
Interop.libssl.SafeSslHandle scHandle = securityContext.SslContext;
resultSize = encrypt ?
Interop.OpenSsl.Encrypt(scHandle, inputPtr, offset, size, buffer.Length, out errorCode) :
Interop.OpenSsl.Decrypt(scHandle, inputPtr, size, out errorCode);
}
}
switch (errorCode)
{
case Interop.libssl.SslErrorCode.SSL_ERROR_RENEGOTIATE:
return(SecurityStatusPal.Renegotiate);
case Interop.libssl.SslErrorCode.SSL_ERROR_ZERO_RETURN:
return(SecurityStatusPal.ContextExpired);
case Interop.libssl.SslErrorCode.SSL_ERROR_NONE:
case Interop.libssl.SslErrorCode.SSL_ERROR_WANT_READ:
return(SecurityStatusPal.OK);
default:
return(SecurityStatusPal.InternalError);
}
}
catch (Exception ex)
{
Debug.Fail("Exception Caught. - " + ex);
return(SecurityStatusPal.InternalError);
}
}
