#include <stream_cipher.h>

Inheritance diagram for Botan::StreamCipher:

Public Member Functions
virtual void	cipher (const byte in[], byte out[], size_t len)=0
void	cipher1 (byte buf[], size_t len)
virtual void	clear ()=0
virtual StreamCipher *	clone () const =0
virtual Key_Length_Specification	key_spec () const =0
size_t	maximum_keylength () const
size_t	minimum_keylength () const
virtual std::string	name () const =0
virtual void	set_iv (const byte iv[], size_t iv_len)
void	set_key (const byte key[], size_t length)
void	set_key (const SymmetricKey &key)
virtual bool	valid_iv_length (size_t iv_len) const
bool	valid_keylength (size_t length) const

Detailed Description

Base class for all stream ciphers

Definition at line 18 of file stream_cipher.h.

Member Function Documentation

◆ cipher()

virtual void Botan::StreamCipher::cipher	(	const byte	in[],
		byte	out[],
		size_t	len )

pure virtual

Encrypt or decrypt a message

Parameters

in	the plaintext
out	the byte array to hold the output, i.e. the ciphertext
len	the length of both in and out in bytes

Implemented in Botan::ARC4, Botan::CTR_BE, Botan::OFB, Botan::Salsa20, Botan::Turing, and Botan::WiderWake_41_BE.

Referenced by cipher1().

◆ cipher1()

void Botan::StreamCipher::cipher1	(	byte	buf[],
		size_t	len )

inline

Encrypt or decrypt a message

Parameters

buf	the plaintext / ciphertext
len	the length of buf in bytes

Definition at line 34 of file stream_cipher.h.

35 { cipher(buf, buf, len); }

Botan::StreamCipher::cipher

virtual void cipher(const byte in[], byte out[], size_t len)=0

References cipher().

◆ clear()

virtual void Botan::Algorithm::clear ( )

pure virtualinherited

Zeroize internal state

Implemented in Botan::Adler32, Botan::AES_128, Botan::AES_128_NI, Botan::AES_128_SSSE3, Botan::AES_192, Botan::AES_192_NI, Botan::AES_192_SSSE3, Botan::AES_256, Botan::AES_256_NI, Botan::AES_256_SSSE3, Botan::ANSI_X919_MAC, Botan::ARC4, Botan::Blowfish, Botan::BMW_512, Botan::Camellia_128, Botan::Camellia_192, Botan::Camellia_256, Botan::Cascade_Cipher, Botan::CAST_128, Botan::CAST_256, Botan::CBC_MAC, Botan::CMAC, Botan::Comb4P, Botan::CRC24, Botan::CRC32, Botan::CTR_BE, Botan::DES, Botan::DESX, Botan::GOST_28147_89, Botan::GOST_34_11, Botan::HAS_160, Botan::HMAC, Botan::IDEA, Botan::KASUMI, Botan::KDF, Botan::Keccak_1600, Botan::Lion, Botan::LubyRackoff, Botan::MARS, Botan::MD2, Botan::MD4, Botan::MD5, Botan::MDx_HashFunction, Botan::MISTY1, Botan::Noekeon, Botan::OFB, Botan::Parallel, Botan::PBKDF, Botan::RC2, Botan::RIPEMD_128, Botan::RIPEMD_160, Botan::SAFER_SK, Botan::Salsa20, Botan::SEED, Botan::Serpent, Botan::SHA_160, Botan::SHA_224, Botan::SHA_256, Botan::SHA_384, Botan::SHA_512, Botan::Skein_512, Botan::Skipjack, Botan::Square, Botan::SSL3_MAC, Botan::TEA, Botan::Tiger, Botan::TripleDES, Botan::Turing, Botan::Twofish, Botan::Whirlpool, Botan::WiderWake_41_BE, and Botan::XTEA.

◆ clone()

virtual StreamCipher * Botan::StreamCipher::clone ( ) const

pure virtual

Get a new object representing the same algorithm as *this

Implemented in Botan::ARC4, Botan::CTR_BE, Botan::OFB, Botan::Salsa20, Botan::Turing, and Botan::WiderWake_41_BE.

Referenced by Botan::Core_Engine::find_block_cipher(), Botan::Core_Engine::get_cipher(), and Botan::Algorithm_Factory::make_stream_cipher().

◆ key_spec()

virtual Key_Length_Specification Botan::SymmetricAlgorithm::key_spec ( ) const

pure virtualinherited

Returns: object describing limits on key size

Referenced by maximum_keylength(), minimum_keylength(), and valid_keylength().

◆ maximum_keylength()

size_t Botan::SymmetricAlgorithm::maximum_keylength ( ) const

inlineinherited

Returns: minimum allowed key length

Definition at line 33 of file sym_algo.h.

         {
         return key_spec().maximum_keylength();
         }

References key_spec().

◆ minimum_keylength()

size_t Botan::SymmetricAlgorithm::minimum_keylength ( ) const

inlineinherited

Returns: maxmium allowed key length

Definition at line 41 of file sym_algo.h.

         {
         return key_spec().minimum_keylength();
         }

References key_spec().

◆ name()

virtual std::string Botan::Algorithm::name ( ) const

pure virtualinherited

Returns: name of this algorithm

Implemented in Botan::Adler32, Botan::AES_128, Botan::AES_128_NI, Botan::AES_128_SSSE3, Botan::AES_192, Botan::AES_192_NI, Botan::AES_192_SSSE3, Botan::AES_256, Botan::AES_256_NI, Botan::AES_256_SSSE3, Botan::ANSI_X919_MAC, Botan::ARC4, Botan::Blowfish, Botan::BMW_512, Botan::Camellia_128, Botan::Camellia_192, Botan::Camellia_256, Botan::Cascade_Cipher, Botan::CAST_128, Botan::CAST_256, Botan::CBC_MAC, Botan::CMAC, Botan::Comb4P, Botan::CRC24, Botan::CRC32, Botan::CTR_BE, Botan::DES, Botan::DESX, Botan::GOST_28147_89, Botan::GOST_34_11, Botan::HAS_160, Botan::HMAC, Botan::IDEA, Botan::KASUMI, Botan::KDF1, Botan::KDF2, Botan::Keccak_1600, Botan::Lion, Botan::LubyRackoff, Botan::MARS, Botan::MD2, Botan::MD4, Botan::MD5, Botan::MessageAuthenticationCode, Botan::MISTY1, Botan::Noekeon, Botan::OFB, Botan::OpenPGP_S2K, Botan::Parallel, Botan::PKCS5_PBKDF1, Botan::PKCS5_PBKDF2, Botan::RC2, Botan::RIPEMD_128, Botan::RIPEMD_160, Botan::SAFER_SK, Botan::Salsa20, Botan::SEED, Botan::Serpent, Botan::SHA_160, Botan::SHA_224, Botan::SHA_256, Botan::SHA_384, Botan::SHA_512, Botan::Skein_512, Botan::Skipjack, Botan::Square, Botan::SSL3_MAC, Botan::SSL3_PRF, Botan::TEA, Botan::Tiger, Botan::TLS_12_PRF, Botan::TLS_PRF, Botan::TripleDES, Botan::Turing, Botan::Twofish, Botan::Whirlpool, Botan::WiderWake_41_BE, Botan::X942_PRF, and Botan::XTEA.

Referenced by Botan::Algorithm_Factory::add_block_cipher(), Botan::Algorithm_Factory::add_hash_function(), Botan::Algorithm_Factory::add_pbkdf(), Botan::Algorithm_Factory::add_stream_cipher(), Botan::choose_sig_format(), Botan::PBE_PKCS5v15::PBE_PKCS5v15(), Botan::PBE_PKCS5v20::PBE_PKCS5v20(), Botan::StreamCipher::set_iv(), and Botan::SymmetricAlgorithm::set_key().

◆ set_iv()

void Botan::StreamCipher::set_iv	(	const byte	iv[],
		size_t	iv_len )

virtual

Resync the cipher using the IV

Parameters

iv	the initialization vector
iv_len	the length of the IV in bytes

Reimplemented in Botan::CTR_BE, Botan::OFB, Botan::Salsa20, Botan::Turing, and Botan::WiderWake_41_BE.

Definition at line 12 of file stream_cipher.cpp.

   {
   if(iv_len)
      throw Invalid_Argument("The stream cipher " + name() +
                             " does not support resyncronization");
   }

References Botan::Algorithm::name().

Referenced by Botan::EAX_Base::set_iv().

◆ set_key() [1/2]

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

inlineinherited

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 68 of file sym_algo.h.

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

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

◆ set_key() [2/2]

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 60 of file sym_algo.h.

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

Botan::SymmetricAlgorithm::set_key

void set_key(const SymmetricKey &key)

Definition sym_algo.h:60

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

Referenced by Botan::aont_package(), Botan::aont_unpackage(), Botan::MAC_Filter::MAC_Filter(), Botan::MAC_Filter::MAC_Filter(), Botan::EAX_Base::set_key(), set_key(), Botan::Record_Reader::set_keys(), Botan::Record_Writer::set_keys(), Botan::StreamCipher_Filter::StreamCipher_Filter(), and Botan::StreamCipher_Filter::StreamCipher_Filter().

◆ valid_iv_length()

bool Botan::StreamCipher::valid_iv_length ( size_t iv_len ) const

virtual

Parameters

iv_len the length of the IV in bytes

Returns: if the length is valid for this algorithm

Reimplemented in Botan::CTR_BE, Botan::OFB, Botan::Salsa20, Botan::Turing, and Botan::WiderWake_41_BE.

Definition at line 19 of file stream_cipher.cpp.

   {
   return (iv_len == 0);
   }

◆ 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 51 of file sym_algo.h.

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

References key_spec().

Referenced by Botan::aont_package(), Botan::aont_unpackage(), set_key(), and Botan::EAX_Base::valid_keylength().

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

src/stream/stream_cipher.h
src/stream/stream_cipher.cpp

Public Member Functions

Detailed Description

Member Function Documentation

◆ cipher()

◆ cipher1()

◆ clear()

◆ clone()

◆ key_spec()

◆ maximum_keylength()

◆ minimum_keylength()

◆ name()

◆ set_iv()

◆ set_key() [1/2]

◆ set_key() [2/2]

◆ valid_iv_length()

◆ valid_keylength()