Botan::Kyber_Algos::PolynomialSampler< SeedT > Class Template Reference

#include <kyber_algos.h>

Public Member Functions
	PolynomialSampler (StrongSpan< const SeedT > seed, const KyberConstants &mode)
KyberPoly	sample_polynomial_cbd_eta2 ()
KyberPolyVec	sample_polynomial_vector_cbd_eta1 ()
KyberPolyVec	sample_polynomial_vector_cbd_eta2 ()

Detailed Description

template<typename SeedT>
requires std::same_as<KyberSeedSigma, SeedT> || std::same_as<KyberEncryptionRandomness, SeedT>
class Botan::Kyber_Algos::PolynomialSampler< SeedT >

Allows sampling multiple polynomials from a single seed via a XOF.

Used in Algorithms 13 (K-PKE.KeyGen) and 14 (K-PKE.Encrypt), and takes care of the continuous nonce value internally.

Definition at line 65 of file kyber_algos.h.

Constructor & Destructor Documentation

PolynomialSampler()

template<typename SeedT >

Botan::Kyber_Algos::PolynomialSampler< SeedT >::PolynomialSampler ( StrongSpan< const SeedT > seed, const KyberConstants & mode )

inline

Definition at line 67 of file kyber_algos.h.

                                                                                  :
            m_seed(seed), m_mode(mode), m_nonce(0) {}

Member Function Documentation

sample_polynomial_cbd_eta2()

template<typename SeedT >

KyberPoly Botan::Kyber_Algos::PolynomialSampler< SeedT >::sample_polynomial_cbd_eta2 ( )

inline

Definition at line 78 of file kyber_algos.h.

      {
         KyberPoly poly;
         sample_poly_cbd(poly, m_mode.eta2());
         return poly;
      }

References Botan::KyberConstants::eta2().

Referenced by Botan::Kyber_PublicKeyInternal::indcpa_encrypt().

sample_polynomial_vector_cbd_eta1()

template<typename SeedT >

KyberPolyVec Botan::Kyber_Algos::PolynomialSampler< SeedT >::sample_polynomial_vector_cbd_eta1 ( )

inline

Definition at line 70 of file kyber_algos.h.

                                                       {
         KyberPolyVec vec(m_mode.k());
         for(auto& poly : vec) {
            sample_poly_cbd(poly, m_mode.eta1());
         }
         return vec;
      }

References Botan::KyberConstants::eta1(), and Botan::KyberConstants::k().

Referenced by Botan::Kyber_Algos::expand_keypair(), and Botan::Kyber_PublicKeyInternal::indcpa_encrypt().

sample_polynomial_vector_cbd_eta2()

template<typename SeedT >

KyberPolyVec Botan::Kyber_Algos::PolynomialSampler< SeedT >::sample_polynomial_vector_cbd_eta2 ( )

inline

Definition at line 86 of file kyber_algos.h.

      {
         KyberPolyVec vec(m_mode.k());
         for(auto& poly : vec) {
            sample_poly_cbd(poly, m_mode.eta2());
         }
         return vec;
      }

References Botan::KyberConstants::eta2(), and Botan::KyberConstants::k().

Referenced by Botan::Kyber_PublicKeyInternal::indcpa_encrypt().

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

• src/lib/pubkey/kyber/kyber_common/kyber_algos.h