Botan::EMSA_X931 Class Reference

#include <emsa_x931.h>

Inheritance diagram for Botan::EMSA_X931:

Public Member Functions
EMSA *	clone () override
virtual AlgorithmIdentifier	config_for_x509 (const Private_Key &key, const std::string &cert_hash_name) const
	EMSA_X931 (HashFunction *hash)
std::string	name () const override

Detailed Description

EMSA from X9.31 (EMSA2 in IEEE 1363) Useful for Rabin-Williams, also sometimes used with RSA in odd protocols.

Definition at line 23 of file emsa_x931.h.

Constructor & Destructor Documentation

Botan::EMSA_X931::EMSA_X931 ( HashFunction *  hash )

explicit

Parameters

hash	the hash function to use

Definition at line 92 of file emsa_x931.cpp.

References Botan::ieee1363_hash_id(), and Botan::HashFunction::name().

                                       : m_hash(hash)
   {
   m_empty_hash = m_hash->final();

   m_hash_id = ieee1363_hash_id(hash->name());

   if(!m_hash_id)
      throw Encoding_Error("EMSA_X931 no hash identifier for " + hash->name());
   }

Member Function Documentation

EMSA* Botan::EMSA_X931::clone ( )

inlineoverridevirtual

Returns

a new object representing the same encoding method as *this

Implements Botan::EMSA.

Definition at line 31 of file emsa_x931.h.

References m_hash.

{ return new EMSA_X931(m_hash->clone()); }

AlgorithmIdentifier Botan::EMSA::config_for_x509 ( const Private_Key &  key, const std::string &  cert_hash_name  ) const

virtualinherited

Prepare sig_algo for use in choose_sig_format for x509 certs

Parameters

key	used for checking compatibility with the encoding scheme
cert_hash_name	is checked to equal the hash for the encoding

Returns

algorithm identifier to signatures created using this key, padding method and hash.

Reimplemented in Botan::EMSA_PKCS1v15, Botan::PSSR, and Botan::EMSA1.

Definition at line 38 of file emsa.cpp.

References Botan::EMSA::name().

   {
   throw Not_Implemented("Encoding " + name() + " not supported for signing X509 objects");
   }

std::string Botan::EMSA_X931::name ( ) const

overridevirtual

Returns

the SCAN name of the encoding/padding scheme

Implements Botan::EMSA.

Definition at line 46 of file emsa_x931.cpp.

   {
   return "EMSA2(" + m_hash->name() + ")";
   }

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

• src/lib/pk_pad/emsa_x931/emsa_x931.h
• src/lib/pk_pad/emsa_x931/emsa_x931.cpp