[Solved]calling ATL dll from C# Runtime Error

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hi,
i have a native C++ dll and a virtual class("mycert") in it.I have an ATL dll project and i included the native dll into the ATL and create an interface for the 'mycert' .In mycert interface i have a function :

STDMETHODIMP Cmycert::setSignature(BYTE* data, SHORT size)
{

        cert = new mycert();
	ByteArray* barray = new ByteArray();
	for(int i=0;i<size;i++)
		(*barray)[i] = data[i];
	ASN1BitString* bitString = new ASN1BitString();
	bitString->setValue(*barray);
	cert->setSignature(bitString);
	
	return S_OK;
}

and in a c# project i include the ATL dll and call the above function:

byte[] data = new byte[3];
data[0] = 4;
data[1] = 6;
data[2] = 8;
mycertClass obj = new mycertClass();
obj.setSignature(ref data[0], 3);

when i run this code, it gives the following error:

"Runtime Error!

Program:
...dio 2008\Projects\myApplication\myApplication\bin\Debug\myApplication.vshost.exe

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information."

my native c++ dll has lots of classes other than 'mycert' and they are not virtual, i can do the same operations on them successfully ,only mycert class cause this error. Am I missing something about virtual classes?
Can you help me please?

Posted 25-Feb-10 2:03am

bltfr

Updated 3-Mar-10 3:44am

v2

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20 solutions

Solution 1

Can you call your function
if it returns S_OK only ? :)

Posted 25-Feb-10 3:31am

Eugen Podsypalnikov

Solution 2

yes i can call it. I am calling the functions of the other interfaces but only this interface doesn't work.

Posted 25-Feb-10 3:43am

bltfr

Solution 3

OK, it is not just a bit :)

Could you explain
why do you need a new mycert()

or what would you like to have in your function ? :)

Posted 25-Feb-10 4:04am

Eugen Podsypalnikov

v2

Solution 4

mycert is the class in my native c++ dll so i should create an instance of it to use the functions of it . I don't create the instance of the mycertclass in the ATL with "new mycert()" code. ByteArray and ASN1BitString classes are also in the native dll and i can do operations with them, there is no problem with them. I am trying to call the setSignature function of the virtual mycert class in native C++ dll.

Posted 25-Feb-10 4:12am

bltfr

Solution 5

Could you post the definition of the mycert class ? :)

Posted 25-Feb-10 4:30am

Eugen Podsypalnikov

Solution 6

#ifdef dll_EXPORTS
#define dll_API __declspec(dllexport)
#else
#define dll_API __declspec(dllimport)
#endif
class dll_API mycert : public Sequence
{
    public:
        mycert(void);
        mycert(string name);
        ~mycert();
        void setTCert(TCert* tCertVal);
        void setSigAlgorithm(AlgId* sigAlgVal);
        void setSignature(ASN1BitString* sigVal);
        TCert* getTBSCert();
        AlgId* getSigAlgorithm();
        ASN1BitString* getSignature();
        ASN1Base* makeCopy(void);
        bool decode(ByteArray input);

    private:
        TCert* tbsCert;
        AlgId* sigAlg;
        ASN1BitString* sign;
        void setUpElements();
};

i have only header files of the dll, it is not my own dll.

Posted 25-Feb-10 4:54am

bltfr

Solution 7

It does not look to be a virtual class... :)

Is there an error
when you reduce the interface function to ? :

{
  mycert cert;
  return S_OK;
}

If you will get no error -
please read the documentation of mycert::setSignature(..)

(may be there is a limitation by the data length or format)
and try to call it with more "real" data :)

Elsewise I would test the DLL (mycert and mycert::setSignature)
from a C++ application directly, without any interface :)

Posted 25-Feb-10 5:08am

Eugen Podsypalnikov

Updated 25-Feb-10 8:56am

v2

Solution 8

I got no error with that code.
I change the code :

STDMETHODIMP Cmycert::setSignature(BYTE* data, SHORT size)
{   
        cert = new mycert();
	ByteArray barray;
	for(int i=0;i<size;i++)
		barray[i] = data[i];
	ASN1BitString* bitString = new ASN1BitString();
	bitString->setValue(barray);
	cert->setSignature(bitString);
	return S_OK;
}

because definition of setValue function of ASN1String class
" void setValue(ByteArray) "
but still it gives the same error.
Thank you very much for your help.

Posted 25-Feb-10 21:05pm

bltfr

Solution 9

You could also place an AfxMessageBox(_T("#<N>"));

after each line in this function to determinate the error source approximately :)

Posted 25-Feb-10 21:19pm

Eugen Podsypalnikov

Solution 10

I put the line AfxMessageBox(_T("#<N>")) ,it gives the following error:

"fatal error C1189: #error : Building MFC application with /MD[d] (CRT dll version) requires MFC shared dll version. Please #define _AFXDLL or do not use /MD[d] c:\Program Files\Microsoft Visual Studio 9.0\VC\atlmfc\include\afx.h "

Posted 25-Feb-10 22:08pm

bltfr

Solution 11

:) ...then MessageBox(NULL, _T("Line #<N>"), _T("We are inside :)"), MB_OK);

Posted 25-Feb-10 22:18pm

Eugen Podsypalnikov

Solution 12

It worked. Thanks Eugen! There is a problem inside the for loop, but i can't understand ,same loop works correctly in other functions.

Posted 25-Feb-10 22:38pm

bltfr

Solution 13

OK :) Please try this body:

{
  BYTE byTest = data[1];
  return S_OK;
}

Posted 25-Feb-10 22:42pm

Eugen Podsypalnikov

Solution 14

it is working, what should i do?

Posted 25-Feb-10 22:45pm

bltfr

Solution 15

May be you should use ByteArray::Add(..) and not [..] ? :)

Posted 25-Feb-10 22:48pm

Eugen Podsypalnikov

Solution 16

there is no Add function, there is an init function but it is protected.

Posted 25-Feb-10 22:50pm

bltfr

Solution 17

Could you post the definition of the class ? :)

Posted 25-Feb-10 22:52pm

Eugen Podsypalnikov

Solution 18

class dll_API ByteArray
{
  public:
      ByteArray(int sz = 0);
      ByteArray(const ByteArray&);
      ~ByteArray();
      ByteArray& operator=(const ByteArray&);
      unsigned char& operator[](int)  throw (RangeException);
      string getHexString(bool);
      string getValueAsString();
      int getSize();
      static ByteArray concat(ByteArray,ByteArray);
      static bool copy(ByteArray, int, ByteArray &, int, int);
      static int compare(ByteArray, ByteArray);

  protected:
      void init(const unsigned char*, int);
      string char2Hex(unsigned char ch);

  private:
      unsigned char* data;
      int size;
};

Posted 25-Feb-10 22:57pm

bltfr

Solution 20

;) it works, Eugen you are perfect. i am very thankful to you

Posted 25-Feb-10 23:04pm

bltfr

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Eugen Podsypalnikov · Accepted Answer · 2010-02-25T23:00:00

Solution 19

OK :) Try to construct your instance as following:

{
...
  ByteArray arTemp(size); // pass the second parameter here :)
  // The loop
...
}

Posted 25-Feb-10 23:00pm

Eugen Podsypalnikov

[Solved]calling ATL dll from C# Runtime Error

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[Solved]calling ATL dll from C# Runtime Error

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