Botan::Blinder Class Reference

#include <blinding.h>

Public Member Functions
BigInt	blind (const BigInt &x) const
	Blinder ()
	Blinder (const BigInt &mask, const BigInt &inverse_mask, const BigInt &modulus)
bool	initialized () const
BigInt	unblind (const BigInt &x) const

Detailed Description

Blinding Function Object

Definition at line 19 of file blinding.h.

Constructor & Destructor Documentation

Blinder() [1/2]

Botan::Blinder::Blinder ( )

inline

Definition at line 27 of file blinding.h.

{}

Referenced by Botan::DH_KA_Operation::DH_KA_Operation(), Botan::ElGamal_Decryption_Operation::ElGamal_Decryption_Operation(), Botan::RSA_Private_Operation::RSA_Private_Operation(), and Botan::RW_Signature_Operation::sign().

Blinder() [2/2]

Botan::Blinder::Blinder	(	const BigInt &	mask,
		const BigInt &	inverse_mask,
		const BigInt &	modulus )

Construct a blinder

Parameters

mask	the forward (blinding) mask
inverse_mask	the inverse of mask (depends on algo)
modulus	of the group operations are performed in

Definition at line 16 of file blinding.cpp.

   {
   if(e < 1 || d < 1 || n < 1)
      throw Invalid_Argument("Blinder: Arguments too small");
 
   reducer = Modular_Reducer(n);
   this->e = e;
   this->d = d;
   }

References Botan::Modular_Reducer::Modular_Reducer().

Member Function Documentation

blind()

BigInt Botan::Blinder::blind

(

const BigInt &

x

)

const

Definition at line 29 of file blinding.cpp.

   {
   if(!reducer.initialized())
      return i;
 
   e = reducer.square(e);
   d = reducer.square(d);
   return reducer.multiply(i, e);
   }

initialized()

bool Botan::Blinder::initialized ( ) const

inline

Definition at line 25 of file blinding.h.

{ return reducer.initialized(); }

unblind()

BigInt Botan::Blinder::unblind

(

const BigInt &

x

)

const

Definition at line 42 of file blinding.cpp.

   {
   if(!reducer.initialized())
      return i;
   return reducer.multiply(i, d);
   }

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

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