C++11 library providing functionality common to all adapters.
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// This file is under GNU General Public License 3.0
// see LICENSE.txt
#include "constant_time_algo.hh"
namespace pEp {
bool constant_time_equal(const std::string &a, const std::string &b)
{
if (a.size() != b.size())
return false;
unsigned d = 0;
for (std::size_t idx = 0; idx < a.size(); ++idx) {
d |= (static_cast<unsigned>(a[idx]) ^ static_cast<unsigned>(b[idx]));
}
// if d is still 0, the strings are equal.
return d == 0;
}
} // end of namespace pEp