That will work, but isn't ideal. The fix to this problem has been checked
into CVS. Please get the latest code (you just need rng.h and rng.cpp)
from there.
On Tue, Apr 15, 2003 at 10:15:56AM +1000, Peter Bell wrote:
> In rng.h add to the declaration of MaurerRandomnessTest
>
> unsigned int Put2(const byte *inString, unsigned int length, int
> messageEnd, bool blocking);
> bool IsolatedFlush(bool hardFlush, bool blocking);
>
> In rnh.cpp
>
> unsigned int MaurerRandomnessTest::Put2(const byte *inString, unsigned
> int length, int messageEnd, bool blocking)
> {
> return -1;
> }
>
> bool MaurerRandomnessTest::IsolatedFlush(bool hardFlush, bool blocking)
> {
> return false;
> }
>
> Then the function Maurer_Test should compile, it does using VC++.
>
>
> void Maurer_Test(const char *rnd_file)
> {
> SecByteBlock rndBuf(20000);
> ArraySink *rndArr;
>
> // Read the random number file from cryptest.exe fips-rand
>
> FileSource inFile(rnd_file, true, rndArr = new ArraySink(rndBuf,
> 20000));
> MaurerRandomnessTest mrTest;
>
> mrTest.Put(rndBuf, 20000);
>
> cout << "Result of Maurer_Test is " << mrTest.GetTestValue() <<
> endl;
> }
>
> Regards,
>
> Peter.
>
> James Bishop wrote:
> >
> > Good afternoon,
> >
> > I'm exploring the RNG facilities of Crypto++5.1 (on Linux 2.4.18, using
> > the gcc 3.2 compiler).
> >
> > 1) Is any block cipher preferred for use with the AutoSeededX917RNG class?
> >
> > 2) I tried to use the MaurerRandomnessTest class to process the output
> > of the /dev/random device supplied by the OS (alleged randomness is
> > coming from the i810_rng driver), which is seeding the X917 rng.
> >
> > I ran cryptest.exe fips-rand to generate "a few" random files.
> >
> > Then I tried to write a filter to test for randomness. However,
> > compilation fails at the declaration of the MaurerRandomnessTest object
> > with the following error messages:
> >
> > /opt/gcc32/bin/g++ -NDEBUG --ffunction-sections -fdata-sections -o
> > maurer_test -I./lib -L./lib maurer_test.cpp -Wl,--gcc-sections -lcryptopp
> > maurer_test.cpp: In function `void Maurer_Test(const char*)':
> > maurer_test.cpp:112: cannot declare variable `mrTest' to be of type `
> > CryptoPP::MaurerRandomnessTest'
> > maurer_test.cpp:112: because the following virtual functions are abstract:
> > lib/cryptlib.h:715: virtual unsigned int
> > CryptoPP::BufferedTransformation::Put2(const byte*, unsigned int,
> > int, bool)
> > lib/cryptlib.h:735: virtual bool
> > CryptoPP::BufferedTransformation::IsolatedFlush(bool, bool)
> > make: *** [maurer_test] Error 1
> >
> > The offending function (which doesn't yet perform the test) is:
> >
> > void Maurer_Test(const char *rnd_file)
> > {
> > SecByteBlock rndBuf(20000);
> > ArraySink *rndArr;
> >
> > // Read the random number file from cryptest.exe fips-rand
> >
> > FileSource inFile(rnd_file, true, rndArr = new ArraySink(rndBuf, 20000);
> > MaurerRandomnessTest mrTest;
> > }
> >
> > How and where should I define the abstract virtual
> > BufferedTransformation functions (Put2 and IsolatedFlush)? I tried
> > defining simple "do-nothing" functions with the appropriate signature,
> > but without success. I guess this is more a problem with my knowledge
> > and understanding of C++.
> >
> > Also, as the MaurerRandomnessTest class inherits from the Sink class,
> > can I simply insert it in the FileSource statement in some way, to pipe
> > the file contents straight into it, instead of first reading the file
> > into an array?
> >
> > Eventually, I would just like to produce a list of the random file names
> > with the corresponding result of the Maurer test on the file's contents.
> >
> > Thanks in advance.
> > --
> >
> > _____________________________________________
> > James Bishop
> > Institute for the Protection and Security of the Citizen (IPSC)
> > European Commission - Joint Research Centre
> > I - 21020 Ispra, Italy
> > Tel.: +39 0332 786225
> > Fax.: +39 0332 789757
> > e-mail: [EMAIL PROTECTED]
>
> --
> //
> // Peter L. Bell [EMAIL PROTECTED]
> // +61 2 9805 2955
> // Blessed are the Peacemakers, they shall be called Sons of God.
> //
