BoxedUint support
          #40
        
          
      
                
     Merged
            
            
          
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This may supersede #39. It uses
*_likeconstructors (see RustCrypto/crypto-bigint#533) instead of automatic widening, which I think is a safer approach.The 1024 bit safe prime generation is about 30% slower for
BoxedUintcompared toUint. Not too bad for a start, but clearly there is room for improvement.@xuganyu96 sorry, tried to base it on your PR, but I guess I changed the first commit too much, and it's not assigned to you anymore.