#include <xmss_tools.h>

Public Member Functions
void	operator= (const XMSS_Tools &)=delete

	XMSS_Tools (const XMSS_Tools &)=delete

Static Public Member Functions
template<typename T , typename U = typename std::enable_if<std::is_integral<T>::value, void>::type>
static void	concat (secure_vector< uint8_t > &target, const T &src)

template<typename T , typename U = typename std::enable_if<std::is_integral<T>::value, void>::type>
static void	concat (secure_vector< uint8_t > &target, const T &src, size_t len)

Detailed Description

Helper tools for low level byte operations required for the XMSS implementation.

Definition at line 22 of file xmss_tools.h.

Constructor & Destructor Documentation

◆ XMSS_Tools()

Botan::XMSS_Tools::XMSS_Tools ( const XMSS_Tools & )

delete

Member Function Documentation

◆ concat() [1/2]

template<typename T , typename U >

void Botan::XMSS_Tools::concat	(	secure_vector< uint8_t > &	target,
		const T &	src
	)

static

Concatenates the byte representation in big-endian order of any integral value to a secure_vector.

Parameters

target	Vector to concatenate the byte representation of the integral value to.
src	integral value to concatenate.

Definition at line 61 of file xmss_tools.h.

   {
   const uint8_t* src_bytes = reinterpret_cast<const uint8_t*>(&src);
   if(CPUID::is_little_endian())
      {
      std::reverse_copy(src_bytes,
                        src_bytes + sizeof(src),
                        std::back_inserter(target));
      }
   else
      {
      std::copy(src_bytes,
                src_bytes + sizeof(src),
                std::back_inserter(target));
      }
   }

References Botan::CPUID::is_little_endian().

Referenced by Botan::XMSS_WOTS_PrivateKey::at(), and Botan::XMSS_WOTS_Parameters::base_w().

◆ concat() [2/2]

template<typename T , typename U >

void Botan::XMSS_Tools::concat	(	secure_vector< uint8_t > &	target,
		const T &	src,
		size_t	len
	)

static

Concatenates the last n bytes of the byte representation in big-endian order of any integral value to a to a secure_vector.

Parameters

target	Vector to concatenate the byte representation of the integral value to.
src	Integral value to concatenate.
len	number of bytes to concatenate. This value must be smaller or equal to the size of type T.

Definition at line 80 of file xmss_tools.h.

   {
   size_t c = static_cast<size_t>(std::min(len, sizeof(src)));
   if(len > sizeof(src))
      {
      target.resize(target.size() + len - sizeof(src), 0);
      }
 
   const uint8_t* src_bytes = reinterpret_cast<const uint8_t*>(&src);
   if(CPUID::is_little_endian())
      {
      std::reverse_copy(src_bytes,
                        src_bytes + c,
                        std::back_inserter(target));
      }
   else
      {
      std::copy(src_bytes + sizeof(src) - c,
                src_bytes + sizeof(src),
                std::back_inserter(target));
      }
   }

References Botan::CPUID::is_little_endian().

◆ operator=()

void Botan::XMSS_Tools::operator= ( const XMSS_Tools & )