onvif_auth_hash.cpp

#include <iostream>
#include <string>
#include <vector>

#include <cryptopp/base64.h>
#include <cryptopp/sha.h>

std::string nonce = "LKqI6G/AikKCQrN0zqZFlg==";
std::string dt = "2010-09-16T07:50:45Z";
std::string pwd = "userpassword";

int main(int argc, char* argv[])
{
    CryptoPP::Base64Decoder decoder;
    decoder.Put((byte*)nonce.data(), nonce.size());
    decoder.MessageEnd();    
    std::vector<uint8_t> bytes(decoder.MaxRetrievable(),0);
    decoder.Get(&bytes[0],bytes.size());

    CryptoPP::SHA1 hash;
    byte digest[CryptoPP::SHA1::DIGESTSIZE];
    hash.Update(bytes.data(), bytes.size());
    hash.Update((const byte*)dt.c_str(), dt.size());
    hash.Update((const byte*)pwd.c_str(), pwd.size());
    hash.Final(digest);

    CryptoPP::Base64Encoder encoder;
    encoder.Put(digest, 20);
    encoder.MessageEnd();    
    std::string hash64(encoder.MaxRetrievable(), 0);
    encoder.Get((byte*)hash64.data(), hash64.size());

    std::cout << hash64 << std::endl;

    return 0;
}

How to use Crypto++ to generate an ONVIF authentication hash as per section 6.1.1.3 of the spec here: http://www.onvif.org/Portals/0/documents/WhitePapers/ONVIF_WG-APG-Application_Programmer's_Guide.pdf