Manik Taneja wrote:
I am trying to write a hash program which could
compute the Hash for all the different types -
SHA1, SHA256, MD5, ....
As such, I wrote the following function that
computes the hash for different algorithms
i coded the function as -
void HashDump(CryptoPP::HashTransformation& hash, char const* Module,
std::string const& strData)
{
....
...
....
...
}
However, when I call the function as -
HashDump(SHA(), "SHA 1", strData);
the compiler generates an error saying -
could not convert 'SHA()' to 'CryptoPP::HashTransformation&'
I really wish to figure out which **interface** to use so that I could
just pass the requisite arguments and the function computes the
appropriate hash for me.
I think CryptoPP::HashTransformation is just what you need.
But are you sure that compiler knows what is SHA()?
Maybe you should write CryptoPP::SHA?
A little hint: you can replace the second hard-coded parameter by
CryptoPP::SHA::StaticAlgorithmName(), this way you'll get the algorithm
name from cryptopp inside. ;)
Also you can make a template function that will do the similar job, like
this:
template<class HASH>
void HashDump(std::string const& strData)
{
//get the algorithm name like this:
char* alg = HASH::StaticAlgorithmName();
}
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Manik Taneja
University at Buffalo
mtaneja [at] buffalo [dot] edu
