Botan::XMSS_Signature_Operation Class Reference

#include <xmss_signature_operation.h>

Inheritance diagram for Botan::XMSS_Signature_Operation:

Public Member Functions
secure_vector< uint8_t >	sign (RandomNumberGenerator &) override
size_t	signature_length () const override
void	update (const uint8_t msg[], size_t msg_len) override
	XMSS_Signature_Operation (const XMSS_PrivateKey &private_key)

Detailed Description

Signature generation operation for Extended Hash-Based Signatures (XMSS) as defined in:

[1] XMSS: Extended Hash-Based Signatures, Request for Comments: 8391 Release: May 2018. https://datatracker.ietf.org/doc/rfc8391/

Definition at line 28 of file xmss_signature_operation.h.

Constructor & Destructor Documentation

XMSS_Signature_Operation()

Botan::XMSS_Signature_Operation::XMSS_Signature_Operation

(

const XMSS_PrivateKey &

private_key

)

Definition at line 21 of file xmss_signature_operation.cpp.

                                       :
   m_priv_key(private_key),
   m_xmss_params(private_key.xmss_oid()),
   m_hash(private_key.xmss_hash_function()),
   m_randomness(0),
   m_leaf_idx(0),
   m_is_initialized(false)
   {}

Member Function Documentation

sign()

secure_vector< uint8_t > Botan::XMSS_Signature_Operation::sign ( RandomNumberGenerator &  )

overridevirtual

Creates an XMSS signature for the message provided through call to update().

Returns

serialized XMSS signature.

Implements Botan::PK_Ops::Signature.

Definition at line 87 of file xmss_signature_operation.cpp.

   {
   initialize();
   secure_vector<uint8_t> signature(sign(m_hash.h_msg_final(),
                                         m_priv_key).bytes());
   m_is_initialized = false;
   return signature;
   }

References Botan::XMSS_Hash::h_msg_final(), and sign().

Referenced by sign().

signature_length()

size_t Botan::XMSS_Signature_Operation::signature_length ( ) const

overridevirtual

Implements Botan::PK_Ops::Signature.

Definition at line 56 of file xmss_signature_operation.cpp.

   {
   return sizeof(uint64_t) + // size of leaf index
          m_xmss_params.element_size() +
          m_xmss_params.len() * m_xmss_params.element_size() +
          m_xmss_params.tree_height() * m_xmss_params.element_size();
   }

References Botan::XMSS_Parameters::element_size(), Botan::XMSS_Parameters::len(), and Botan::XMSS_Parameters::tree_height().

update()

void Botan::XMSS_Signature_Operation::update ( const uint8_t  msg[], size_t  msg_len  )

overridevirtual

Implements Botan::PK_Ops::Signature.

Definition at line 80 of file xmss_signature_operation.cpp.

   {
   initialize();
   m_hash.h_msg_update(msg, msg_len);
   }

References Botan::XMSS_Hash::h_msg_update().

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

• src/lib/pubkey/xmss/xmss_signature_operation.h
• src/lib/pubkey/xmss/xmss_signature_operation.cpp