Botan::Blinder Class Reference

#include <blinding.h>

List of all members.

Public Member Functions
BigInt	blind (const BigInt &x) const
	Blinder ()
	Blinder (const BigInt &modulus, std::function< BigInt(const BigInt &)> fwd_func, std::function< BigInt(const BigInt &)> inv_func)
bool	initialized () const
BigInt	unblind (const BigInt &x) const

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Detailed Description

Blinding Function Object

Definition at line 20 of file blinding.h.

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Constructor & Destructor Documentation

Botan::Blinder::Blinder

(

)

[inline]

Definition at line 29 of file blinding.h.

{}

Botan::Blinder::Blinder	(	const BigInt &	modulus,
		std::function< BigInt(const BigInt &)>	fwd_func,
		std::function< BigInt(const BigInt &)>	inv_func
	)

Definition at line 21 of file blinding.cpp.

References Botan::BigInt::bits(), and Botan::system_rng().

   {
   m_reducer = Modular_Reducer(modulus);

#if defined(BOTAN_HAS_SYSTEM_RNG)
   auto& rng = system_rng();
#else
   AutoSeeded_RNG rng;
#endif

   const BigInt k(rng, modulus.bits() - 1);

   m_e = fwd_func(k);
   m_d = inv_func(k);
   }

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Member Function Documentation

BigInt Botan::Blinder::blind

(

const BigInt &

x

)

const

Definition at line 39 of file blinding.cpp.

References Botan::Modular_Reducer::initialized(), Botan::Modular_Reducer::multiply(), and Botan::Modular_Reducer::square().

   {
   if(!m_reducer.initialized())
      throw std::runtime_error("Blinder not initialized, cannot blind");

   m_e = m_reducer.square(m_e);
   m_d = m_reducer.square(m_d);
   return m_reducer.multiply(i, m_e);
   }

bool Botan::Blinder::initialized

(

)

const [inline]

Definition at line 27 of file blinding.h.

{ return m_reducer.initialized(); }

BigInt Botan::Blinder::unblind

(

const BigInt &

x

)

const

Definition at line 49 of file blinding.cpp.

References Botan::Modular_Reducer::initialized(), and Botan::Modular_Reducer::multiply().

   {
   if(!m_reducer.initialized())
      throw std::runtime_error("Blinder not initialized, cannot unblind");

   return m_reducer.multiply(i, m_d);
   }

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The documentation for this class was generated from the following files:

• src/lib/pubkey/blinding.h
• src/lib/pubkey/blinding.cpp