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70 lines
1.1 KiB
C++
70 lines
1.1 KiB
C++
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#include "Share.h"
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#include "Math/gfp.h"
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#include "Math/gf2n.h"
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#include "Math/Z2k.h"
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#include "Math/FixedVec.h"
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#include "Math/Integer.h"
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template<class T>
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inline
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void Share<T>::mul_by_bit(const Share<T>& S,const T& aa)
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{
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a.mul(S.a,aa);
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mac.mul(S.mac,aa);
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}
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template<>
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inline
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void Share<gf2n>::mul_by_bit(const Share<gf2n>& S, const gf2n& aa)
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{
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a.mul_by_bit(S.a,aa);
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mac.mul_by_bit(S.mac,aa);
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}
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template<class T>
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T combine(const vector< Share<T> >& S)
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{
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T ans=S[0].a;
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for (unsigned int i=1; i<S.size(); i++)
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{ ans.add(ans,S[i].a); }
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return ans;
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}
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template<class T>
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inline void Share<T>::pack(octetStream& os, bool full) const
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{
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a.pack(os);
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if (full)
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mac.pack(os);
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}
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template<class T>
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inline void Share<T>::unpack(octetStream& os, bool full)
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{
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a.unpack(os);
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if (full)
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mac.unpack(os);
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}
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template<class T>
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bool check_macs(const vector< Share<T> >& S,const T& key)
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{
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T val=combine(S);
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// Now check the MAC is valid
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val.mul(val,key);
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for (unsigned i=0; i<S.size(); i++)
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{ val.sub(val,S[i].mac); }
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if (!val.is_zero()) { return false; }
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return true;
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}
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