I'm having what appears to be the same problem with StringSource. The
following function works with Crypto++ 5.1 in VS2003, but does not
work with Crypto++ 5.4 or 5.5.2. In VS2003, it throws an exception. In
VS2008 no errors occur, but "signature" is not populated. I'm
upgrading our code to VS2008, and am stuck at this point - since Crypto
++ 5.1 does not work under VS2008. Is there a work-around?
int rsa_sha1_sign( const string &key, const string &plaintext, string
&signature)
{
try
{
AutoSeededRandomPool rng;
RSASSA_PKCS1v15_SHA_Signer privkey(StringSource(key, true, new
Base64Decoder()));
SecByteBlock sbbSignature(privkey.SignatureLength());
privkey.SignMessage(rng, (byte const*) plaintext.data(),
plaintext.size(), sbbSignature.begin());
StringSource source(sbbSignature, true, new Base64Encoder(new
StringSink(signature),false));
}
catch(CryptoPP::Exception)
{
return 0;
}
return 1;
}
On Feb 29, 7:22 am, whatazor <[EMAIL PROTECTED]> wrote:
> Hi,
> I've used this code (but the difference is only that the class is
> instanciated internally to function brackets) and the behaviour
> doesn't change.
>
> :(
>
> On 25 Feb, 00:23, "Jeffrey Walton" <[EMAIL PROTECTED]> wrote:
>
>
>
> > Hi w,
>
> > I suspect it has to with your usage of the library. Try the following.
>
> > Jeff
>
> > #include <iostream>
> > #include <string>
>
> > using std::string;
> > using std::cout;
> > using std::endl;
>
> > #include "default.h"
> > #include "filters.h"
>
> > using CryptoPP::DefaultEncryptorWithMAC;
> > using CryptoPP::DefaultDecryptorWithMAC;
> > using CryptoPP::StringSink;
> > using CryptoPP::StringSource;
>
> > int main(int argc, char* argv[])
> > {
> > string message = "secret message";
> > string password = "password";
> > string encrypted, recovered;
>
> > StringSource(
> > message,
> > true,
> > new DefaultEncryptorWithMAC(
> > password.c_str(),
> > new StringSink( encrypted )
> > ) // DefaultEncryptorWithMAC
> > ); // StringSource
>
> > StringSource(
> > encrypted,
> > true,
> > new DefaultDecryptorWithMAC(
> > password.c_str(),
> > new StringSink( recovered )
> > ) // DefaultDecryptorWithMAC
> > ); // StringSource
>
> > cout << "Recovered Text:" << endl;
> > cout << " " << recovered << endl;
>
> > return 0;
>
> > }
>
> > On 2/22/08, whatazor <[EMAIL PROTECTED]> wrote:
>
> > > Hi All,
> > > I use crypto 5.4 and I notice a strange problem using an automated
> > > test for testing a wrapping class of StringSource I have. This
> > > wrapping class only call StringSource, but the problems is that
> > > sometimes (not regularly) StringSource throw an exception even if this
> > > automated test use always the same string to crypt and then decrypt,
> > > and the same passphrase
>
> > > try
> > > {
> > > StringSink *ssink = new StringSink(out);
> > > DefaultEncryptorWithMAC * mac = new
> > > DefaultEncryptorWithMAC(passPhrase, ssink);
>
> > > StringSource s((const byte *)in, len, true, mac);
> > > }
> > > catch (...)
> > > {
> > > result = false;
> > > }
>
> > > where is the problem?
>
> > > thx you very much
> > > w- Hide quoted text -
>
> - Show quoted text -
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