Botan::CFB_Encryption Class Reference

#include <cfb.h>

Inheritance diagram for Botan::CFB_Encryption:

Public Member Functions
bool	authenticated () const
	CFB_Encryption (std::unique_ptr< BlockCipher > cipher, size_t feedback_bits)
void	clear () override final
size_t	default_nonce_length () const override final
void	finish (secure_vector< uint8_t > &final_block, size_t offset=0) override
Key_Length_Specification	key_spec () const override final
size_t	maximum_keylength () const
size_t	minimum_final_size () const override final
size_t	minimum_keylength () const
std::string	name () const override final
size_t	output_length (size_t input_length) const override final
size_t	process (uint8_t buf[], size_t size) override
virtual std::string	provider () const
void	reset () override final
template<typename Alloc >
void	set_key (const std::vector< uint8_t, Alloc > &key)
void	set_key (const SymmetricKey &key)
void	set_key (const uint8_t key[], size_t length)
void	start ()
template<typename Alloc >
void	start (const std::vector< uint8_t, Alloc > &nonce)
void	start (const uint8_t nonce[], size_t nonce_len)
virtual size_t	tag_size () const
void	update (secure_vector< uint8_t > &buffer, size_t offset=0)
size_t	update_granularity () const override final
bool	valid_keylength (size_t length) const
bool	valid_nonce_length (size_t n) const override final

Static Public Member Functions
static std::unique_ptr< Cipher_Mode >	create (const std::string &algo, Cipher_Dir direction, const std::string &provider="")
static std::unique_ptr< Cipher_Mode >	create_or_throw (const std::string &algo, Cipher_Dir direction, const std::string &provider="")
static std::vector< std::string >	providers (const std::string &algo_spec)

Protected Member Functions
size_t	block_size () const
const BlockCipher &	cipher () const
size_t	feedback () const
void	shift_register ()
void	verify_key_set (bool cond) const

Protected Attributes
secure_vector< uint8_t >	m_keystream
size_t	m_keystream_pos = 0
secure_vector< uint8_t >	m_state

Detailed Description

CFB Encryption

Definition at line 65 of file cfb.h.

Constructor & Destructor Documentation

CFB_Encryption()

Botan::CFB_Encryption::CFB_Encryption ( std::unique_ptr< BlockCipher >  cipher, size_t  feedback_bits  )

inline

If feedback_bits is zero, cipher->block_size() bytes will be used.

Parameters

cipher	block cipher to use
feedback_bits	number of bits fed back into the shift register, must be a multiple of 8

Definition at line 74 of file cfb.h.

                                                                              :
         CFB_Mode(std::move(cipher), feedback_bits) {}

Member Function Documentation

authenticated()

bool Botan::Cipher_Mode::authenticated ( ) const

inlineinherited

Returns

true iff this mode provides authentication as well as confidentiality.

Definition at line 169 of file cipher_mode.h.

{ return this->tag_size() > 0; }

block_size()

size_t Botan::CFB_Mode::block_size ( ) const

inlineprotectedinherited

Definition at line 47 of file cfb.h.

{ return m_block_size; }

Referenced by Botan::CFB_Mode::default_nonce_length(), Botan::CFB_Mode::name(), Botan::CFB_Mode::shift_register(), and Botan::CFB_Mode::valid_nonce_length().

cipher()

const BlockCipher & Botan::CFB_Mode::cipher ( ) const

inlineprotectedinherited

Definition at line 46 of file cfb.h.

{ return *m_cipher; }

Referenced by Botan::CFB_Mode::key_spec(), Botan::CFB_Mode::name(), and Botan::CFB_Mode::shift_register().

clear()

void Botan::CFB_Mode::clear ( )

finaloverridevirtualinherited

Reset the state.

Implements Botan::SymmetricAlgorithm.

Definition at line 23 of file cfb.cpp.

   {
   m_cipher->clear();
   m_keystream.clear();
   reset();
   }

References Botan::CFB_Mode::m_keystream, and Botan::CFB_Mode::reset().

create()

std::unique_ptr< Cipher_Mode > Botan::Cipher_Mode::create ( const std::string &  algo, Cipher_Dir  direction, const std::string &  provider = ""  )

staticinherited

Create an AEAD mode

Parameters

algo	the algorithm to create
direction	specify if this should be an encryption or decryption AEAD
provider	optional specification for provider to use

Returns

an AEAD mode or a null pointer if not available

Definition at line 50 of file cipher_mode.cpp.

   {
#if defined(BOTAN_HAS_COMMONCRYPTO)
   if(provider.empty() || provider == "commoncrypto")
      {
      std::unique_ptr<Cipher_Mode> commoncrypto_cipher(make_commoncrypto_cipher_mode(algo, direction));
 
      if(commoncrypto_cipher)
         return commoncrypto_cipher;
 
      if(!provider.empty())
         return std::unique_ptr<Cipher_Mode>();
      }
#endif
 
#if defined(BOTAN_HAS_STREAM_CIPHER)
   if(auto sc = StreamCipher::create(algo))
      {
      return std::make_unique<Stream_Cipher_Mode>(std::move(sc));
      }
#endif
 
#if defined(BOTAN_HAS_AEAD_MODES)
   if(auto aead = AEAD_Mode::create(algo, direction))
      {
      return aead;
      }
#endif
 
   if(algo.find('/') != std::string::npos)
      {
      const std::vector<std::string> algo_parts = split_on(algo, '/');
      const std::string cipher_name = algo_parts[0];
      const std::vector<std::string> mode_info = parse_algorithm_name(algo_parts[1]);
 
      if(mode_info.empty())
         return std::unique_ptr<Cipher_Mode>();
 
      std::ostringstream mode_name;
 
      mode_name << mode_info[0] << '(' << cipher_name;
      for(size_t i = 1; i < mode_info.size(); ++i)
         mode_name << ',' << mode_info[i];
      for(size_t i = 2; i < algo_parts.size(); ++i)
         mode_name << ',' << algo_parts[i];
      mode_name << ')';
 
      return Cipher_Mode::create(mode_name.str(), direction, provider);
      }
 
#if defined(BOTAN_HAS_BLOCK_CIPHER)
 
   SCAN_Name spec(algo);
 
   if(spec.arg_count() == 0)
      {
      return std::unique_ptr<Cipher_Mode>();
      }
 
   std::unique_ptr<BlockCipher> bc(BlockCipher::create(spec.arg(0), provider));
 
   if(!bc)
      {
      return std::unique_ptr<Cipher_Mode>();
      }
 
#if defined(BOTAN_HAS_MODE_CBC)
   if(spec.algo_name() == "CBC")
      {
      const std::string padding = spec.arg(1, "PKCS7");
 
      if(padding == "CTS")
         {
         if(direction == ENCRYPTION)
            return std::make_unique<CTS_Encryption>(std::move(bc));
         else
            return std::make_unique<CTS_Decryption>(std::move(bc));
         }
      else
         {
         auto pad = BlockCipherModePaddingMethod::create(padding);
 
         if(pad)
            {
            if(direction == ENCRYPTION)
               return std::make_unique<CBC_Encryption>(std::move(bc), std::move(pad));
            else
               return std::make_unique<CBC_Decryption>(std::move(bc), std::move(pad));
            }
         }
      }
#endif
 
#if defined(BOTAN_HAS_MODE_XTS)
   if(spec.algo_name() == "XTS")
      {
      if(direction == ENCRYPTION)
         return std::make_unique<XTS_Encryption>(std::move(bc));
      else
         return std::make_unique<XTS_Decryption>(std::move(bc));
      }
#endif
 
#if defined(BOTAN_HAS_MODE_CFB)
   if(spec.algo_name() == "CFB")
      {
      const size_t feedback_bits = spec.arg_as_integer(1, 8*bc->block_size());
      if(direction == ENCRYPTION)
         return std::make_unique<CFB_Encryption>(std::move(bc), feedback_bits);
      else
         return std::make_unique<CFB_Decryption>(std::move(bc), feedback_bits);
      }
#endif
 
#endif
 
   return std::unique_ptr<Cipher_Mode>();
   }

References Botan::SCAN_Name::algo_name(), Botan::SCAN_Name::arg(), Botan::SCAN_Name::arg_as_integer(), Botan::SCAN_Name::arg_count(), Botan::AEAD_Mode::create(), Botan::Cipher_Mode::create(), Botan::BlockCipherModePaddingMethod::create(), Botan::BlockCipher::create(), Botan::StreamCipher::create(), Botan::ENCRYPTION, Botan::make_commoncrypto_cipher_mode(), Botan::parse_algorithm_name(), Botan::Cipher_Mode::provider(), and Botan::split_on().

Referenced by botan_cipher_init(), Botan::Cipher_Mode::create(), Botan::Cipher_Mode::create_or_throw(), Botan::get_cipher_mode(), Botan::pbes2_decrypt(), and Botan::Cipher_Mode::providers().

create_or_throw()

std::unique_ptr< Cipher_Mode > Botan::Cipher_Mode::create_or_throw ( const std::string &  algo, Cipher_Dir  direction, const std::string &  provider = ""  )

staticinherited

Create an AEAD mode, or throw

Parameters

algo	the algorithm to create
direction	specify if this should be an encryption or decryption AEAD
provider	optional specification for provider to use

Returns

an AEAD mode, or throw an exception

Definition at line 40 of file cipher_mode.cpp.

   {
   if(auto mode = Cipher_Mode::create(algo, direction, provider))
      return mode;
 
   throw Lookup_Error("Cipher mode", algo, provider);
   }

References Botan::Cipher_Mode::create(), and Botan::Cipher_Mode::provider().

Referenced by Botan::ECIES_System_Params::create_cipher(), Botan::CryptoBox::decrypt_bin(), Botan::CryptoBox::encrypt(), and Botan::get_cipher().

default_nonce_length()

size_t Botan::CFB_Mode::default_nonce_length ( ) const

finaloverridevirtualinherited

Returns

the default size for a nonce

Implements Botan::Cipher_Mode.

Definition at line 64 of file cfb.cpp.

   {
   return block_size();
   }

References Botan::CFB_Mode::block_size().

feedback()

size_t Botan::CFB_Mode::feedback ( ) const

inlineprotectedinherited

Definition at line 45 of file cfb.h.

{ return m_feedback_bytes; }

Referenced by Botan::CFB_Mode::name(), process(), Botan::CFB_Decryption::process(), Botan::CFB_Mode::shift_register(), and Botan::CFB_Mode::update_granularity().

finish()

void Botan::CFB_Encryption::finish ( secure_vector< uint8_t > &  final_block, size_t  offset = 0  )

overridevirtual

Complete processing of a message.

Parameters

final_block	in/out parameter which must be at least minimum_final_size() bytes, and will be set to any final output
offset	an offset into final_block to begin processing

Implements Botan::Cipher_Mode.

Definition at line 163 of file cfb.cpp.

   {
   update(buffer, offset);
   }

References Botan::Cipher_Mode::update().

key_spec()

Key_Length_Specification Botan::CFB_Mode::key_spec ( ) const

finaloverridevirtualinherited

Returns

object describing limits on key size

Implements Botan::SymmetricAlgorithm.

Definition at line 59 of file cfb.cpp.

   {
   return cipher().key_spec();
   }

References Botan::CFB_Mode::cipher(), and Botan::SymmetricAlgorithm::key_spec().

maximum_keylength()

size_t Botan::SymmetricAlgorithm::maximum_keylength ( ) const

inlineinherited

Returns

maximum allowed key length

Definition at line 120 of file sym_algo.h.

         {
         return key_spec().maximum_keylength();
         }

minimum_final_size()

size_t Botan::CFB_Mode::minimum_final_size ( ) const

finaloverridevirtualinherited

Returns

required minimium size to finalize() - may be any length larger than this.

Implements Botan::Cipher_Mode.

Definition at line 54 of file cfb.cpp.

   {
   return 0;
   }

minimum_keylength()

size_t Botan::SymmetricAlgorithm::minimum_keylength ( ) const

inlineinherited

Returns

minimum allowed key length

Definition at line 128 of file sym_algo.h.

         {
         return key_spec().minimum_keylength();
         }

Referenced by botan_block_cipher_get_keyspec(), and botan_mac_get_keyspec().

name()

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

finaloverridevirtualinherited

Returns

the algorithm name

Implements Botan::SymmetricAlgorithm.

Definition at line 36 of file cfb.cpp.

   {
   if(feedback() == cipher().block_size())
      return cipher().name() + "/CFB";
   else
      return cipher().name() + "/CFB(" + std::to_string(feedback()*8) + ")";
   }

References Botan::CFB_Mode::block_size(), Botan::CFB_Mode::cipher(), Botan::CFB_Mode::feedback(), Botan::SymmetricAlgorithm::name(), and Botan::ASN1::to_string().

output_length()

size_t Botan::CFB_Mode::output_length ( size_t  input_length ) const

finaloverridevirtualinherited

Returns the size of the output if this transform is used to process a message with input_length bytes. In most cases the answer is precise. If it is not possible to precise (namely for CBC decryption) instead a lower bound is returned.

Implements Botan::Cipher_Mode.

Definition at line 44 of file cfb.cpp.

   {
   return input_length;
   }

process()

size_t Botan::CFB_Encryption::process ( uint8_t  msg[], size_t  msg_len  )

overridevirtual

Process message blocks

Input must be a multiple of update_granularity

Processes msg in place and returns bytes written. Normally this will be either msg_len (indicating the entire message was processed) or for certain AEAD modes zero (indicating that the mode requires the entire message be processed in one pass).

Parameters

msg	the message to be processed
msg_len	length of the message in bytes

Implements Botan::Cipher_Mode.

Definition at line 117 of file cfb.cpp.

   {
   verify_key_set(!m_keystream.empty());
   BOTAN_STATE_CHECK(m_state.empty() == false);
 
   const size_t shift = feedback();
 
   size_t left = sz;
 
   if(m_keystream_pos != 0)
      {
      const size_t take = std::min<size_t>(left, shift - m_keystream_pos);
 
      xor_buf(m_keystream.data() + m_keystream_pos, buf, take);
      copy_mem(buf, m_keystream.data() + m_keystream_pos, take);
 
      m_keystream_pos += take;
      left -= take;
      buf += take;
 
      if(m_keystream_pos == shift)
         {
         shift_register();
         }
      }
 
   while(left >= shift)
      {
      xor_buf(m_keystream.data(), buf, shift);
      copy_mem(buf, m_keystream.data(), shift);
 
      left -= shift;
      buf += shift;
      shift_register();
      }
 
   if(left > 0)
      {
      xor_buf(m_keystream.data(), buf, left);
      copy_mem(buf, m_keystream.data(), left);
      m_keystream_pos += left;
      }
 
   return sz;
   }

References BOTAN_STATE_CHECK, Botan::copy_mem(), Botan::CFB_Mode::feedback(), Botan::CFB_Mode::m_keystream, Botan::CFB_Mode::m_keystream_pos, Botan::CFB_Mode::m_state, Botan::CFB_Mode::shift_register(), Botan::SymmetricAlgorithm::verify_key_set(), and Botan::xor_buf().

provider()

virtual std::string Botan::Cipher_Mode::provider ( ) const

inlinevirtualinherited

Returns

provider information about this implementation. Default is "base", might also return "sse2", "avx2", "openssl", or some other arbitrary string.

Reimplemented in Botan::GCM_Mode.

Definition at line 180 of file cipher_mode.h.

{ return "base"; }

Referenced by Botan::AEAD_Mode::create(), Botan::Cipher_Mode::create(), Botan::AEAD_Mode::create_or_throw(), and Botan::Cipher_Mode::create_or_throw().

providers()

std::vector< std::string > Botan::Cipher_Mode::providers ( const std::string &  algo_spec )

staticinherited

Returns

list of available providers for this algorithm, empty if not available

Parameters

algo_spec

algorithm name

Definition at line 172 of file cipher_mode.cpp.

   {
   const std::vector<std::string>& possible = { "base", "commoncrypto" };
   std::vector<std::string> providers;
   for(auto&& prov : possible)
      {
      std::unique_ptr<Cipher_Mode> mode = Cipher_Mode::create(algo_spec, ENCRYPTION, prov);
      if(mode)
         {
         providers.push_back(prov); // available
         }
      }
   return providers;
   }

References Botan::Cipher_Mode::create(), Botan::ENCRYPTION, and Botan::Cipher_Mode::providers().

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

reset()

void Botan::CFB_Mode::reset ( )

finaloverridevirtualinherited

Resets just the message specific state and allows encrypting again under the existing key

Implements Botan::Cipher_Mode.

Definition at line 30 of file cfb.cpp.

   {
   m_state.clear();
   zeroise(m_keystream);
   }

References Botan::CFB_Mode::m_keystream, Botan::CFB_Mode::m_state, and Botan::zeroise().

Referenced by Botan::CFB_Mode::clear().

set_key() [1/3]

template<typename Alloc >

void Botan::SymmetricAlgorithm::set_key ( const std::vector< uint8_t, Alloc > &  key )

inlineinherited

Definition at line 153 of file sym_algo.h.

         {
         set_key(key.data(), key.size());
         }

set_key() [2/3]

void Botan::SymmetricAlgorithm::set_key ( const SymmetricKey &  key )

inlineinherited

Set the symmetric key of this object.

Parameters

key	the SymmetricKey to be set.

Definition at line 147 of file sym_algo.h.

         {
         set_key(key.begin(), key.length());
         }

References Botan::OctetString::begin(), and Botan::OctetString::length().

Referenced by botan_cipher_set_key(), botan_mac_set_key(), Botan::Sodium::crypto_stream_salsa20(), Botan::Sodium::crypto_stream_salsa20_xor_ic(), Botan::Sodium::crypto_stream_xsalsa20(), Botan::Sodium::crypto_stream_xsalsa20_xor_ic(), Botan::FPE::fe1_decrypt(), Botan::FPE::fe1_encrypt(), and Botan::Sodium::randombytes_buf_deterministic().

set_key() [3/3]

void Botan::SymmetricAlgorithm::set_key ( const uint8_t  key[], size_t  length  )

inherited

Set the symmetric key of this object.

Parameters

key	the to be set as a byte array.
length	in bytes of key param

Definition at line 17 of file sym_algo.cpp.

   {
   if(!valid_keylength(length))
      throw Invalid_Key_Length(name(), length);
   key_schedule(key, length);
   }

References Botan::SymmetricAlgorithm::name(), and Botan::SymmetricAlgorithm::valid_keylength().

shift_register()

void Botan::CFB_Mode::shift_register ( )

protectedinherited

Definition at line 103 of file cfb.cpp.

   {
   const size_t shift = feedback();
   const size_t carryover = block_size() - shift;
 
   if(carryover > 0)
      {
      copy_mem(m_state.data(), &m_state[shift], carryover);
      }
   copy_mem(&m_state[carryover], m_keystream.data(), shift);
   cipher().encrypt(m_state, m_keystream);
   m_keystream_pos = 0;
   }

References Botan::CFB_Mode::block_size(), Botan::CFB_Mode::cipher(), Botan::copy_mem(), Botan::BlockCipher::encrypt(), Botan::CFB_Mode::feedback(), Botan::CFB_Mode::m_keystream, Botan::CFB_Mode::m_keystream_pos, and Botan::CFB_Mode::m_state.

Referenced by process(), and Botan::CFB_Decryption::process().

start() [1/3]

void Botan::Cipher_Mode::start ( )

inlineinherited

Begin processing a message.

Definition at line 87 of file cipher_mode.h.

         {
         return start_msg(nullptr, 0);
         }

start() [2/3]

template<typename Alloc >

void Botan::Cipher_Mode::start ( const std::vector< uint8_t, Alloc > &  nonce )

inlineinherited

Begin processing a message.

Parameters

nonce

the per message nonce

Definition at line 69 of file cipher_mode.h.

         {
         start_msg(nonce.data(), nonce.size());
         }

Referenced by botan_cipher_start(), and Botan::TLS::write_record().

start() [3/3]

void Botan::Cipher_Mode::start ( const uint8_t  nonce[], size_t  nonce_len  )

inlineinherited

Begin processing a message.

Parameters

nonce	the per message nonce
nonce_len	length of nonce

Definition at line 79 of file cipher_mode.h.

         {
         start_msg(nonce, nonce_len);
         }

tag_size()

virtual size_t Botan::Cipher_Mode::tag_size ( ) const

inlinevirtualinherited

Returns

the size of the authentication tag used (in bytes)

Reimplemented in Botan::CCM_Mode, Botan::ChaCha20Poly1305_Mode, Botan::EAX_Mode, Botan::OCB_Mode, Botan::SIV_Mode, Botan::GCM_Mode, and Botan::TLS::TLS_CBC_HMAC_AEAD_Mode.

Definition at line 174 of file cipher_mode.h.

{ return 0; }

Referenced by botan_cipher_get_tag_length().

update()

void Botan::Cipher_Mode::update ( secure_vector< uint8_t > &  buffer, size_t  offset = 0  )

inlineinherited

Process some data. Input must be in size update_granularity() uint8_t blocks.

Parameters

buffer	in/out parameter which will possibly be resized
offset	an offset into blocks to begin processing

Definition at line 112 of file cipher_mode.h.

         {
         BOTAN_ASSERT(buffer.size() >= offset, "Offset ok");
         uint8_t* buf = buffer.data() + offset;
         const size_t buf_size = buffer.size() - offset;
 
         const size_t written = process(buf, buf_size);
         buffer.resize(offset + written);
         }

References BOTAN_ASSERT.

Referenced by botan_cipher_update(), Botan::ChaCha20Poly1305_Encryption::finish(), Botan::EAX_Encryption::finish(), Botan::CBC_Encryption::finish(), Botan::CTS_Encryption::finish(), Botan::CBC_Decryption::finish(), Botan::CTS_Decryption::finish(), finish(), Botan::CFB_Decryption::finish(), Botan::XTS_Encryption::finish(), Botan::XTS_Decryption::finish(), Botan::TLS::TLS_CBC_HMAC_AEAD_Encryption::finish(), and Botan::TLS::TLS_CBC_HMAC_AEAD_Decryption::finish().

update_granularity()

size_t Botan::CFB_Mode::update_granularity ( ) const

finaloverridevirtualinherited

Returns

size of required blocks to update

Implements Botan::Cipher_Mode.

Definition at line 49 of file cfb.cpp.

   {
   return feedback();
   }

References Botan::CFB_Mode::feedback().

valid_keylength()

bool Botan::SymmetricAlgorithm::valid_keylength ( size_t  length ) const

inlineinherited

Check whether a given key length is valid for this algorithm.

Parameters

length

the key length to be checked.

Returns

true if the key length is valid.

Definition at line 138 of file sym_algo.h.

         {
         return key_spec().valid_keylength(length);
         }

Referenced by Botan::SymmetricAlgorithm::set_key().

valid_nonce_length()

bool Botan::CFB_Mode::valid_nonce_length ( size_t  nonce_len ) const

finaloverridevirtualinherited

Returns

true iff nonce_len is a valid length for the nonce

Implements Botan::Cipher_Mode.

Definition at line 69 of file cfb.cpp.

   {
   return (n == 0 || n == block_size());
   }

References Botan::CFB_Mode::block_size().

verify_key_set()

void Botan::SymmetricAlgorithm::verify_key_set ( bool  cond ) const

inlineprotectedinherited

Definition at line 171 of file sym_algo.h.

         {
         if(cond == false)
            throw_key_not_set_error();
         }

Referenced by Botan::ChaCha::cipher(), Botan::CTR_BE::cipher(), Botan::RC4::cipher(), Botan::Salsa20::cipher(), Botan::SHAKE_128_Cipher::cipher(), Botan::AES_128::decrypt_n(), Botan::AES_192::decrypt_n(), Botan::AES_256::decrypt_n(), Botan::ARIA_128::decrypt_n(), Botan::ARIA_192::decrypt_n(), Botan::ARIA_256::decrypt_n(), Botan::Blowfish::decrypt_n(), Botan::Camellia_128::decrypt_n(), Botan::Camellia_192::decrypt_n(), Botan::Camellia_256::decrypt_n(), Botan::CAST_128::decrypt_n(), Botan::DES::decrypt_n(), Botan::TripleDES::decrypt_n(), Botan::GOST_28147_89::decrypt_n(), Botan::IDEA::decrypt_n(), Botan::Lion::decrypt_n(), Botan::Noekeon::decrypt_n(), Botan::SEED::decrypt_n(), Botan::Serpent::decrypt_n(), Botan::SHACAL2::decrypt_n(), Botan::SM4::decrypt_n(), Botan::Threefish_512::decrypt_n(), Botan::Twofish::decrypt_n(), Botan::AES_128::encrypt_n(), Botan::AES_192::encrypt_n(), Botan::AES_256::encrypt_n(), Botan::ARIA_128::encrypt_n(), Botan::ARIA_192::encrypt_n(), Botan::ARIA_256::encrypt_n(), Botan::Blowfish::encrypt_n(), Botan::Camellia_128::encrypt_n(), Botan::Camellia_192::encrypt_n(), Botan::Camellia_256::encrypt_n(), Botan::CAST_128::encrypt_n(), Botan::DES::encrypt_n(), Botan::TripleDES::encrypt_n(), Botan::GOST_28147_89::encrypt_n(), Botan::IDEA::encrypt_n(), Botan::Lion::encrypt_n(), Botan::Noekeon::encrypt_n(), Botan::SEED::encrypt_n(), Botan::Serpent::encrypt_n(), Botan::SHACAL2::encrypt_n(), Botan::SM4::encrypt_n(), Botan::Threefish_512::encrypt_n(), Botan::Twofish::encrypt_n(), Botan::OCB_Encryption::finish(), Botan::OCB_Decryption::finish(), Botan::GHASH::ghash_update(), process(), Botan::CFB_Decryption::process(), Botan::ChaCha::seek(), Botan::CTR_BE::seek(), Botan::Salsa20::seek(), Botan::OCB_Mode::set_associated_data(), Botan::ChaCha::set_iv(), Botan::Salsa20::set_iv(), Botan::GHASH::update(), Botan::GHASH::update_associated_data(), and Botan::ChaCha::write_keystream().

Member Data Documentation

m_keystream

secure_vector<uint8_t> Botan::CFB_Mode::m_keystream

protectedinherited

Definition at line 50 of file cfb.h.

Referenced by Botan::CFB_Mode::clear(), process(), Botan::CFB_Decryption::process(), Botan::CFB_Mode::reset(), and Botan::CFB_Mode::shift_register().

m_keystream_pos

size_t Botan::CFB_Mode::m_keystream_pos = 0

protectedinherited

Definition at line 51 of file cfb.h.

Referenced by process(), Botan::CFB_Decryption::process(), and Botan::CFB_Mode::shift_register().

m_state

secure_vector<uint8_t> Botan::CFB_Mode::m_state

protectedinherited

Definition at line 49 of file cfb.h.

Referenced by process(), Botan::CFB_Decryption::process(), Botan::CFB_Mode::reset(), and Botan::CFB_Mode::shift_register().

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

• src/lib/modes/cfb/cfb.h
• src/lib/modes/cfb/cfb.cpp