SHA-1 With Boost

main.cpp

#include <iostream>
#include <boost/uuid/sha1.hpp>

void display(char* hash)
{
	std::cout << "SHA1: " << std::hex;
    for(int i = 0; i < 20; ++i)
    {
        std::cout << ((hash[i] & 0x000000F0) >> 4) 
                  <<  (hash[i] & 0x0000000F);
    } 
    std::cout << std::endl; // Das wars  
}

int main() {
	boost::uuids::detail::sha1 s;
	char hash[20];
	std::string a = "Franz jagt im komplett verwahrlosten Taxi quer durch Bayern";
	s.process_bytes(a.c_str(), a.size());
	unsigned int digest[5];
	s.get_digest(digest);
	for(int i = 0; i < 5; ++i)
	{
		const char* tmp = reinterpret_cast<char*>(digest);
		hash[i*4] = tmp[i*4+3];
		hash[i*4+1] = tmp[i*4+2];
		hash[i*4+2] = tmp[i*4+1];
		hash[i*4+3] = tmp[i*4];
	}
	display(hash);
}