Botan 3.0.0-alpha0
Crypto and TLS for C&
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#include <cfb.h>
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 |
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inline |
If feedback_bits is zero, cipher->block_size() bytes will be used.
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.
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inlineinherited |
Definition at line 169 of file cipher_mode.h.
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inlineprotectedinherited |
Definition at line 47 of file cfb.h.
Referenced by Botan::CFB_Mode::default_nonce_length(), Botan::CFB_Mode::name(), Botan::CFB_Mode::shift_register(), and Botan::CFB_Mode::valid_nonce_length().
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inlineprotectedinherited |
Definition at line 46 of file cfb.h.
Referenced by Botan::CFB_Mode::key_spec(), Botan::CFB_Mode::name(), and Botan::CFB_Mode::shift_register().
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finaloverridevirtualinherited |
Reset the state.
Implements Botan::SymmetricAlgorithm.
Definition at line 23 of file cfb.cpp.
References Botan::CFB_Mode::m_keystream, and Botan::CFB_Mode::reset().
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staticinherited |
Create an AEAD mode
algo | the algorithm to create |
direction | specify if this should be an encryption or decryption AEAD |
provider | optional specification for provider to use |
Definition at line 50 of file cipher_mode.cpp.
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().
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staticinherited |
Create an AEAD mode, or throw
algo | the algorithm to create |
direction | specify if this should be an encryption or decryption AEAD |
provider | optional specification for provider to use |
Definition at line 40 of file cipher_mode.cpp.
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().
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finaloverridevirtualinherited |
Implements Botan::Cipher_Mode.
Definition at line 64 of file cfb.cpp.
References Botan::CFB_Mode::block_size().
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inlineprotectedinherited |
Definition at line 45 of file cfb.h.
Referenced by Botan::CFB_Mode::name(), process(), Botan::CFB_Decryption::process(), Botan::CFB_Mode::shift_register(), and Botan::CFB_Mode::update_granularity().
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overridevirtual |
Complete processing of a message.
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.
References Botan::Cipher_Mode::update().
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finaloverridevirtualinherited |
Implements Botan::SymmetricAlgorithm.
Definition at line 59 of file cfb.cpp.
References Botan::CFB_Mode::cipher(), and Botan::SymmetricAlgorithm::key_spec().
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inlineinherited |
Definition at line 120 of file sym_algo.h.
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finaloverridevirtualinherited |
Implements Botan::Cipher_Mode.
Definition at line 54 of file cfb.cpp.
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inlineinherited |
Definition at line 128 of file sym_algo.h.
Referenced by botan_block_cipher_get_keyspec(), and botan_mac_get_keyspec().
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finaloverridevirtualinherited |
Implements Botan::SymmetricAlgorithm.
Definition at line 36 of file cfb.cpp.
References Botan::CFB_Mode::block_size(), Botan::CFB_Mode::cipher(), Botan::CFB_Mode::feedback(), Botan::SymmetricAlgorithm::name(), and Botan::ASN1::to_string().
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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.
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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).
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.
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().
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inlinevirtualinherited |
Reimplemented in Botan::GCM_Mode.
Definition at line 180 of file cipher_mode.h.
Referenced by Botan::AEAD_Mode::create(), Botan::Cipher_Mode::create(), Botan::AEAD_Mode::create_or_throw(), and Botan::Cipher_Mode::create_or_throw().
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staticinherited |
algo_spec | algorithm name |
Definition at line 172 of file cipher_mode.cpp.
References Botan::Cipher_Mode::create(), Botan::ENCRYPTION, and Botan::Cipher_Mode::providers().
Referenced by Botan::Cipher_Mode::providers().
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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.
References Botan::CFB_Mode::m_keystream, Botan::CFB_Mode::m_state, and Botan::zeroise().
Referenced by Botan::CFB_Mode::clear().
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inlineinherited |
Definition at line 153 of file sym_algo.h.
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inlineinherited |
Set the symmetric key of this object.
key | the SymmetricKey to be set. |
Definition at line 147 of file sym_algo.h.
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().
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inherited |
Set the symmetric key of this object.
key | the to be set as a byte array. |
length | in bytes of key param |
Definition at line 17 of file sym_algo.cpp.
References Botan::SymmetricAlgorithm::name(), and Botan::SymmetricAlgorithm::valid_keylength().
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protectedinherited |
Definition at line 103 of file cfb.cpp.
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().
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inlineinherited |
Begin processing a message.
Definition at line 87 of file cipher_mode.h.
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inlineinherited |
Begin processing a message.
nonce | the per message nonce |
Definition at line 69 of file cipher_mode.h.
Referenced by botan_cipher_start(), and Botan::TLS::write_record().
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inlineinherited |
Begin processing a message.
nonce | the per message nonce |
nonce_len | length of nonce |
Definition at line 79 of file cipher_mode.h.
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inlinevirtualinherited |
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.
Referenced by botan_cipher_get_tag_length().
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inlineinherited |
Process some data. Input must be in size update_granularity() uint8_t blocks.
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.
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().
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finaloverridevirtualinherited |
Implements Botan::Cipher_Mode.
Definition at line 49 of file cfb.cpp.
References Botan::CFB_Mode::feedback().
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inlineinherited |
Check whether a given key length is valid for this algorithm.
length | the key length to be checked. |
Definition at line 138 of file sym_algo.h.
Referenced by Botan::SymmetricAlgorithm::set_key().
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finaloverridevirtualinherited |
Implements Botan::Cipher_Mode.
Definition at line 69 of file cfb.cpp.
References Botan::CFB_Mode::block_size().
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inlineprotectedinherited |
Definition at line 171 of file sym_algo.h.
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().
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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().
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protectedinherited |
Definition at line 51 of file cfb.h.
Referenced by process(), Botan::CFB_Decryption::process(), and Botan::CFB_Mode::shift_register().
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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().