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/*
* XMSS Parameters
* Descibes a signature method for XMSS, as defined in:
* [1] XMSS: Extended Hash-Based Signatures,
* Request for Comments: 8391
* Release: May 2018.
* https://datatracker.ietf.org/doc/rfc8391/
*
* (C) 2016,2017,2018 Matthias Gierlings
*
* Botan is released under the Simplified BSD License (see license.txt)
**/
#include <botan/xmss_parameters.h>
#include <botan/exceptn.h>
namespace Botan {
XMSS_Parameters::xmss_algorithm_t XMSS_Parameters::xmss_id_from_string(const std::string& param_set)
{
if(param_set == "XMSS-SHA2_10_256")
{ return XMSS_SHA2_10_256; }
if(param_set == "XMSS-SHA2_16_256")
{ return XMSS_SHA2_16_256; }
if(param_set == "XMSS-SHA2_20_256")
{ return XMSS_SHA2_20_256; }
if(param_set == "XMSS-SHA2_10_512")
{ return XMSS_SHA2_10_512; }
if(param_set == "XMSS-SHA2_16_512")
{ return XMSS_SHA2_16_512; }
if(param_set == "XMSS-SHA2_20_512")
{ return XMSS_SHA2_20_512; }
if(param_set == "XMSS-SHAKE_10_256")
{ return XMSS_SHAKE_10_256; }
if(param_set == "XMSS-SHAKE_16_256")
{ return XMSS_SHAKE_16_256; }
if(param_set == "XMSS-SHAKE_20_256")
{ return XMSS_SHAKE_20_256; }
if(param_set == "XMSS-SHAKE_10_512")
{ return XMSS_SHAKE_10_512; }
if(param_set == "XMSS-SHAKE_16_512")
{ return XMSS_SHAKE_16_512; }
if(param_set == "XMSS-SHAKE_20_512")
{ return XMSS_SHAKE_20_512; }
throw Lookup_Error("Unknown XMSS algorithm param '" + param_set + "'");
}
XMSS_Parameters::XMSS_Parameters(const std::string& param_set)
: XMSS_Parameters(XMSS_Parameters::xmss_id_from_string(param_set))
{
}
XMSS_Parameters::XMSS_Parameters(xmss_algorithm_t oid)
: m_oid(oid)
{
switch(oid)
{
case XMSS_SHA2_10_256:
m_element_size = 32;
m_w = 16;
m_len = 67;
m_tree_height = 10;
m_name = "XMSS-SHA2_10_256";
m_hash_name = "SHA-256";
m_strength = 256;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHA2_256;
break;
case XMSS_SHA2_16_256:
m_element_size = 32;
m_w = 16;
m_len = 67;
m_tree_height = 16;
m_name = "XMSS-SHA2_16_256";
m_hash_name = "SHA-256";
m_strength = 256;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHA2_256;
break;
case XMSS_SHA2_20_256:
m_element_size = 32;
m_w = 16;
m_len = 67;
m_tree_height = 20;
m_name = "XMSS-SHA2_20_256";
m_hash_name = "SHA-256";
m_strength = 256;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHA2_256;
break;
case XMSS_SHA2_10_512:
m_element_size = 64;
m_w = 16;
m_len = 131;
m_tree_height = 10;
m_name = "XMSS-SHA2_10_512";
m_hash_name = "SHA-512";
m_strength = 512;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHA2_512;
break;
case XMSS_SHA2_16_512:
m_element_size = 64;
m_w = 16;
m_len = 131;
m_tree_height = 16;
m_name = "XMSS-SHA2_16_512";
m_hash_name = "SHA-512";
m_strength = 512;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHA2_512;
break;
case XMSS_SHA2_20_512:
m_element_size = 64;
m_w = 16;
m_len = 131;
m_tree_height = 20;
m_name = "XMSS-SHA2_20_512";
m_hash_name = "SHA-512";
m_strength = 512;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHA2_512;
break;
case XMSS_SHAKE_10_256:
m_element_size = 32;
m_w = 16;
m_len = 67;
m_tree_height = 10;
m_name = "XMSS-SHAKE_10_256";
m_hash_name = "SHAKE-128(256)";
m_strength = 256;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHAKE_256;
break;
case XMSS_SHAKE_16_256:
m_element_size = 32;
m_w = 16;
m_len = 67;
m_tree_height = 16;
m_name = "XMSS-SHAKE_16_256";
m_hash_name = "SHAKE-128(256)";
m_strength = 256;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHAKE_256;
break;
case XMSS_SHAKE_20_256:
m_element_size = 32;
m_w = 16;
m_len = 67;
m_tree_height = 20;
m_name = "XMSS-SHAKE_20_256";
m_hash_name = "SHAKE-128(256)";
m_strength = 256;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHAKE_256;
break;
case XMSS_SHAKE_10_512:
m_element_size = 64;
m_w = 16;
m_len = 131;
m_tree_height = 10;
m_name = "XMSS-SHAKE_10_512";
m_hash_name = "SHAKE-256(512)";
m_strength = 512;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHAKE_512;
break;
case XMSS_SHAKE_16_512:
m_element_size = 64;
m_w = 16;
m_len = 131;
m_tree_height = 16;
m_name = "XMSS-SHAKE_16_512";
m_hash_name = "SHAKE-256(512)";
m_strength = 512;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHAKE_512;
break;
case XMSS_SHAKE_20_512:
m_element_size = 64;
m_w = 16;
m_len = 131;
m_tree_height = 20;
m_name = "XMSS-SHAKE_20_512";
m_hash_name = "SHAKE-256(512)";
m_strength = 512;
m_wots_oid = XMSS_WOTS_Parameters::ots_algorithm_t::WOTSP_SHAKE_512;
break;
default:
throw Not_Implemented("Algorithm id does not match any known XMSS algorithm id:" + std::to_string(oid));
break;
}
}
}
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