Botan::Null_Padding Class Reference

#include <mode_pad.h>

Inheritance diagram for Botan::Null_Padding:

Public Member Functions
void	add_padding (secure_vector< uint8_t > &, size_t, size_t) const override
std::string	name () const override
size_t	unpad (const uint8_t[], size_t size) const override
bool	valid_blocksize (size_t) const override

Static Public Member Functions
static std::unique_ptr< BlockCipherModePaddingMethod >	create (std::string_view algo_spec)

Detailed Description

Null Padding

Definition at line 141 of file mode_pad.h.

Member Function Documentation

add_padding()

void Botan::Null_Padding::add_padding ( secure_vector< uint8_t > &  buffer, size_t  final_block_bytes, size_t  block_size  ) const

inlineoverridevirtual

Add padding bytes to buffer.

Parameters

buffer	data to pad
final_block_bytes	size of the final block in bytes
block_size	size of each block in bytes

Implements Botan::BlockCipherModePaddingMethod.

Definition at line 144 of file mode_pad.h.

         {
         /* no padding */
         }

create()

std::unique_ptr< BlockCipherModePaddingMethod > Botan::BlockCipherModePaddingMethod::create ( std::string_view  algo_spec )

staticinherited

Get a block cipher padding mode by name (eg "NoPadding" or "PKCS7")

Parameters

algo_spec

block cipher padding mode name

Get a block cipher padding method by name

Definition at line 19 of file mode_pad.cpp.

   {
   if(algo_spec == "NoPadding")
      return std::make_unique<Null_Padding>();
 
   if(algo_spec == "PKCS7")
      return std::make_unique<PKCS7_Padding>();
 
   if(algo_spec == "OneAndZeros")
      return std::make_unique<OneAndZeros_Padding>();
 
   if(algo_spec == "X9.23")
      return std::make_unique<ANSI_X923_Padding>();
 
   if(algo_spec == "ESP")
      return std::make_unique<ESP_Padding>();
 
   return nullptr;
   }

Referenced by Botan::Cipher_Mode::create().

name()

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

inlineoverridevirtual

Returns

name of the mode

Implements Botan::BlockCipherModePaddingMethod.

Definition at line 153 of file mode_pad.h.

{ return "NoPadding"; }

unpad()

size_t Botan::Null_Padding::unpad ( const uint8_t  block[], size_t  len  ) const

inlineoverridevirtual

Remove padding bytes from block

Parameters

block	the last block
len	the size of the block in bytes

Returns

number of data bytes, or if the padding is invalid returns len

Implements Botan::BlockCipherModePaddingMethod.

Definition at line 149 of file mode_pad.h.

{ return size; }

valid_blocksize()

bool Botan::Null_Padding::valid_blocksize ( size_t  block_size ) const

inlineoverridevirtual

Parameters

block_size

of the cipher

Returns

valid block size for this padding mode

Implements Botan::BlockCipherModePaddingMethod.

Definition at line 151 of file mode_pad.h.

{ return true; }

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

• src/lib/modes/mode_pad/mode_pad.h