#include <pk_ops_impl.h>

Inheritance diagram for Botan::PK_Ops::KEM_Encryption_with_KDF:

Public Member Functions
virtual size_t	encapsulated_key_length () const =0

void	kem_encrypt (std::span< uint8_t > out_encapsulated_key, std::span< uint8_t > out_shared_key, RandomNumberGenerator &rng, size_t desired_shared_key_len, std::span< const uint8_t > salt) final

size_t	shared_key_length (size_t desired_shared_key_len) const final

	~KEM_Encryption_with_KDF () override=default

Protected Member Functions
	KEM_Encryption_with_KDF (std::string_view kdf)

virtual void	raw_kem_encrypt (std::span< uint8_t > out_encapsulated_key, std::span< uint8_t > out_raw_shared_key, RandomNumberGenerator &rng)=0

virtual size_t	raw_kem_shared_key_length () const =0

Detailed Description

Definition at line 121 of file pk_ops_impl.h.

Constructor & Destructor Documentation

◆ ~KEM_Encryption_with_KDF()

Botan::PK_Ops::KEM_Encryption_with_KDF::~KEM_Encryption_with_KDF ( )

overridedefault

◆ KEM_Encryption_with_KDF()

Botan::PK_Ops::KEM_Encryption_with_KDF::KEM_Encryption_with_KDF ( std::string_view kdf )

explicitprotected

Definition at line 190 of file pk_ops.cpp.

                                                                         {
   if(kdf != "Raw") {
      m_kdf = KDF::create_or_throw(kdf);
   }
}

References Botan::KDF::create_or_throw().

Member Function Documentation

◆ encapsulated_key_length()

virtual size_t Botan::PK_Ops::KEM_Encryption::encapsulated_key_length ( ) const

pure virtualinherited

◆ kem_encrypt()

void Botan::PK_Ops::KEM_Encryption_with_KDF::kem_encrypt	(	std::span< uint8_t >	out_encapsulated_key,
		std::span< uint8_t >	out_shared_key,
		RandomNumberGenerator &	rng,
		size_t	desired_shared_key_len,
		std::span< const uint8_t >	salt
	)

finalvirtual

Implements Botan::PK_Ops::KEM_Encryption.

Definition at line 169 of file pk_ops.cpp.

                                                                               {
   BOTAN_ARG_CHECK(salt.empty() || m_kdf, "PK_KEM_Encryptor::encrypt requires a KDF to use a salt");
   BOTAN_ASSERT_NOMSG(out_encapsulated_key.size() == encapsulated_key_length());
 
   if(m_kdf) {
      BOTAN_ASSERT_EQUAL(
         out_shared_key.size(), desired_shared_key_len, "KDF output length and shared key length match");
 
      secure_vector<uint8_t> raw_shared(raw_kem_shared_key_length());
      this->raw_kem_encrypt(out_encapsulated_key, raw_shared, rng);
      m_kdf->derive_key(out_shared_key, raw_shared, salt, {});
   } else {
      BOTAN_ASSERT_EQUAL(out_shared_key.size(), raw_kem_shared_key_length(), "Shared key has raw KEM output length");
      this->raw_kem_encrypt(out_encapsulated_key, out_shared_key, rng);
   }
}

References BOTAN_ARG_CHECK, BOTAN_ASSERT_EQUAL, and BOTAN_ASSERT_NOMSG.

◆ raw_kem_encrypt()

virtual void Botan::PK_Ops::KEM_Encryption_with_KDF::raw_kem_encrypt	(	std::span< uint8_t >	out_encapsulated_key,
		std::span< uint8_t >	out_raw_shared_key,
		RandomNumberGenerator &	rng
	)

protectedpure virtual

◆ raw_kem_shared_key_length()

virtual size_t Botan::PK_Ops::KEM_Encryption_with_KDF::raw_kem_shared_key_length ( ) const

protectedpure virtual

◆ shared_key_length()

size_t Botan::PK_Ops::KEM_Encryption_with_KDF::shared_key_length ( size_t desired_shared_key_len ) const