Botan::EMSA Class Reference

#include <emsa.h>

Inheritance diagram for Botan::EMSA:

Public Member Functions
virtual EMSA *	clone ()=0
virtual AlgorithmIdentifier	config_for_x509 (const Private_Key &key, const std::string &cert_hash_name) const
virtual secure_vector< uint8_t >	encoding_of (const secure_vector< uint8_t > &msg, size_t output_bits, RandomNumberGenerator &rng)=0
virtual std::string	name () const =0
virtual secure_vector< uint8_t >	raw_data ()=0
virtual void	update (const uint8_t input[], size_t length)=0
virtual bool	verify (const secure_vector< uint8_t > &coded, const secure_vector< uint8_t > &raw, size_t key_bits)=0
virtual	~EMSA ()=default

Detailed Description

EMSA, from IEEE 1363s Encoding Method for Signatures, Appendix

Any way of encoding/padding signatures

Definition at line 24 of file emsa.h.

Constructor & Destructor Documentation

~EMSA()

virtual Botan::EMSA::~EMSA ( )

virtualdefault

Member Function Documentation

clone()

virtual EMSA* Botan::EMSA::clone ( )

pure virtual

Returns

a new object representing the same encoding method as *this

Implemented in Botan::PSSR_Raw, Botan::ISO_9796_DS3, Botan::EMSA_PKCS1v15_Raw, Botan::ISO_9796_DS2, Botan::PSSR, Botan::EMSA_PKCS1v15, Botan::EMSA_X931, Botan::EMSA1, and Botan::EMSA_Raw.

config_for_x509()

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

virtual

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 name().

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

encoding_of()

virtual secure_vector<uint8_t> Botan::EMSA::encoding_of ( const secure_vector< uint8_t > &  msg, size_t  output_bits, RandomNumberGenerator &  rng  )

pure virtual

Return the encoding of a message

Parameters

msg	the result of raw_data()
output_bits	the desired output bit size
rng	a random number generator

Returns

encoded signature

Implemented in Botan::EMSA_PKCS1v15_Raw, and Botan::EMSA_PKCS1v15.

name()

virtual std::string Botan::EMSA::name ( ) const

pure virtual

Returns

the SCAN name of the encoding/padding scheme

Implemented in Botan::PSSR_Raw, Botan::EMSA_PKCS1v15_Raw, Botan::ISO_9796_DS3, Botan::EMSA_PKCS1v15, Botan::ISO_9796_DS2, Botan::PSSR, Botan::EMSA_X931, Botan::EMSA1, and Botan::EMSA_Raw.

Referenced by config_for_x509().

raw_data()

virtual secure_vector<uint8_t> Botan::EMSA::raw_data ( )

pure virtual

Returns

raw hash

Implemented in Botan::EMSA_PKCS1v15_Raw, and Botan::EMSA_PKCS1v15.

update()

virtual void Botan::EMSA::update ( const uint8_t  input[], size_t  length  )

pure virtual

Add more data to the signature computation

Parameters

input	some data
length	length of input in bytes

Implemented in Botan::EMSA_PKCS1v15_Raw, and Botan::EMSA_PKCS1v15.

verify()

virtual bool Botan::EMSA::verify ( const secure_vector< uint8_t > &  coded, const secure_vector< uint8_t > &  raw, size_t  key_bits  )

pure virtual

Verify the encoding

Parameters

coded	the received (coded) message representative
raw	the computed (local, uncoded) message representative
key_bits	the size of the key in bits

Returns

true if coded is a valid encoding of raw, otherwise false

Implemented in Botan::EMSA_PKCS1v15_Raw, and Botan::EMSA_PKCS1v15.

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

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