Could any one help me please?!!
On Jun 11, 11:31 am, Gary <[email protected]> wrote:
> Hello
> I use of RSA sign and verify code in my program such below:
>
> //sign a message
> string message = "Yoda said, Do or Do Not. There is not try.";
> byte signature[256];
>
> AutoSeededRandomPool rng;
> StringSource privArray(privkey1,privkeysize,true,NULL);
> RSASSA_PKCS1v15_SHA_Signer priv(privArray);
>
> // Sign Away...
> StringSource(message, true,
> new SignerFilter( rng, priv,
> new ArraySink(signature,256)
> )// SignerFilter
> ); // StringSource
>
> //Verify signature
> StringSource pubArray(pubkey1,pubsize, true,NULL);
> StringSource SignatureArray( signature,priv.SignatureLength(),
> true,NULL);
> // Verifier Object
> RSASSA_PKCS1v15_SHA_Verifier pub(pubArray);
> // Sanity Check
> if (SignatureArray.MaxRetrievable() != pub.SignatureLength())
> m_List.AddString(L"Signature Array Size Problem");
>
> SecByteBlock Signature( pub.SignatureLength() );
> SignatureArray.Get( Signature, Signature.size());
> // Prepare Verifier
> VerifierFilter *verifierFilter =new VerifierFilter(pub);
> verifierFilter->Put(Signature, pub.SignatureLength());
> // Invoke Verifier
> StringSource( message, true, new Redirector(*verifierFilter));
>
> // Paydirt
> if( false == verifierFilter->GetLastResult() )
> m_List.AddString(L"Signature Verification Failed");
> else
> m_List.AddString(L"Signature Verified");
>
> I need to zero the public key in part of my program as following:
>
> for(int i=0;i<pubsize;i++)
> pubkey1[i]=0;
>
> but then I get a diagnostic as below:
>
> Unhandled exception at 0x7c812aeb in program.exe: Microsoft C++
> exception: CryptoPP::BERDecodeErr at memory location 0x0012dc9c..
>
> in this line:
> RSASSA_PKCS1v15_SHA_Verifier pub(pubArray);
>
> Related to " inline void BERDecodeError() {throw BERDecodeErr();" line
> of " asn.h" file!
>
> How could I suppress this problem?
>
> And a general problem:
>
> When I use CryptoPP library compiled with Multi-threaded Debug DLL (/
> MDd) switch in my project, I get 4 warnings as below:
>
> Crypto++
> 1>C:\ config.h(434) : warning RC4011: identifier truncated to
> 'CRYPTOPP_MANUALLY_INSTANTIATE_T'
>
> 1>C:\ config.h(448) : warning RC4011: identifier truncated to
> 'CRYPTOPP_MANUALLY_INSTANTIATE_T'
>
> 1>C:\ secblock.h(488) : warning RC4011: identifier truncated to
> '_STLP_DONT_SUPPORT_REBIND_MEMBE'
>
> 1>C:\ osrng.h(143) : warning RC4011: identifier truncated to
> 'CRYPTOPP_ENABLE_COMPLIANCE_WITH'
>
> What is the reason of these warnings?
>
> Thanks in Advance.
> Gary
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