#include <dl_scheme.h>

Public Member Functions
bool	check_key (RandomNumberGenerator &rng, bool strong) const
std::vector< uint8_t >	DER_encode () const
	DL_PublicKey (const AlgorithmIdentifier &alg_id, std::span< const uint8_t > key_bits, DL_Group_Format format)
	DL_PublicKey (const DL_Group &group, const BigInt &public_key)
size_t	estimated_strength () const
const BigInt &	get_int_field (std::string_view algo_name, std::string_view field) const
const DL_Group &	group () const
size_t	p_bits () const
const BigInt &	public_key () const
std::vector< uint8_t >	public_key_as_bytes () const

Detailed Description

Definition at line 21 of file dl_scheme.h.

Constructor & Destructor Documentation

◆ DL_PublicKey() [1/2]

Botan::DL_PublicKey::DL_PublicKey	(	const DL_Group &	group,
		const BigInt &	public_key )

Definition at line 38 of file dl_scheme.cpp.

                                                                          : m_group(group), m_public_key(public_key) {
   // The subgroup check (y^q == 1 mod p) is deferred to check_key() since it can be expensive
   BOTAN_ARG_CHECK(m_public_key > 1 && m_public_key < m_group.get_p(), "Invalid DL public key");
}

References BOTAN_ARG_CHECK, group(), and public_key().

◆ DL_PublicKey() [2/2]

Botan::DL_PublicKey::DL_PublicKey	(	const AlgorithmIdentifier &	alg_id,
		std::span< const uint8_t >	key_bits,
		DL_Group_Format	format )

Definition at line 43 of file dl_scheme.cpp.

                                                   :
      m_group(alg_id.parameters(), format), m_public_key(decode_single_bigint(key_bits)) {
   BOTAN_ARG_CHECK(m_public_key > 1 && m_public_key < m_group.get_p(), "Invalid DL public key");
}

References BOTAN_ARG_CHECK.

Member Function Documentation

◆ check_key()

bool Botan::DL_PublicKey::check_key	(	RandomNumberGenerator &	rng,
		bool	strong ) const

Definition at line 60 of file dl_scheme.cpp.

                                                                          {
   return m_group.verify_group(rng, strong) && m_group.verify_public_element(m_public_key);
}

◆ DER_encode()

std::vector< uint8_t > Botan::DL_PublicKey::DER_encode ( ) const

Definition at line 54 of file dl_scheme.cpp.

                                                  {
   std::vector<uint8_t> output;
   DER_Encoder(output).encode(m_public_key);
   return output;
}

References Botan::DER_Encoder::encode().

◆ estimated_strength()

size_t Botan::DL_PublicKey::estimated_strength ( ) const

Definition at line 64 of file dl_scheme.cpp.

                                              {
   return m_group.estimated_strength();
}

◆ get_int_field()

const BigInt & Botan::DL_PublicKey::get_int_field	(	std::string_view	algo_name,
		std::string_view	field ) const

Definition at line 105 of file dl_scheme.cpp.

                                                                                         {
   if(field == "p") {
      return m_group.get_p();
   } else if(field == "q") {
      return m_group.get_q();
   } else if(field == "g") {
      return m_group.get_g();
   } else if(field == "y") {
      return m_public_key;
   } else {
      throw Unknown_PK_Field_Name(algo, field);
   }
}

◆ group()

const DL_Group & Botan::DL_PublicKey::group ( ) const

inline

Definition at line 29 of file dl_scheme.h.

29{ return m_group; }

Referenced by DL_PublicKey().

◆ p_bits()

size_t Botan::DL_PublicKey::p_bits ( ) const

Definition at line 68 of file dl_scheme.cpp.

                                  {
   return m_group.p_bits();
}

◆ public_key()

const BigInt & Botan::DL_PublicKey::public_key ( ) const

inline

Definition at line 31 of file dl_scheme.h.

31{ return m_public_key; }