Botan 2.19.1
Crypto and TLS for C&
Public Member Functions | Static Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
Botan::CFB_Mode Class Referenceabstract

#include <cfb.h>

Inheritance diagram for Botan::CFB_Mode:
Botan::Cipher_Mode Botan::SymmetricAlgorithm Botan::CFB_Decryption Botan::CFB_Encryption

Public Member Functions

virtual bool authenticated () const
 
void clear () override final
 
size_t default_nonce_length () const override final
 
virtual void finish (secure_vector< uint8_t > &final_block, size_t offset=0)=0
 
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
 
virtual size_t process (uint8_t msg[], size_t msg_len)=0
 
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_Modecreate (const std::string &algo, Cipher_Dir direction, const std::string &provider="")
 
static std::unique_ptr< Cipher_Modecreate_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
 
 CFB_Mode (BlockCipher *cipher, size_t feedback_bits)
 
const BlockCiphercipher () 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 Mode

Definition at line 22 of file cfb.h.

Constructor & Destructor Documentation

◆ CFB_Mode()

Botan::CFB_Mode::CFB_Mode ( BlockCipher cipher,
size_t  feedback_bits 
)
protected

Definition at line 13 of file cfb.cpp.

13 :
14 m_cipher(cipher),
15 m_block_size(m_cipher->block_size()),
16 m_feedback_bytes(feedback_bits ? feedback_bits / 8 : m_block_size)
17 {
18 if(feedback_bits % 8 || feedback() > cipher->block_size())
19 throw Invalid_Argument(name() + ": feedback bits " +
20 std::to_string(feedback_bits) + " not supported");
21 }
virtual size_t block_size() const =0
std::string name() const override final
Definition: cfb.cpp:36
size_t feedback() const
Definition: cfb.h:47
const BlockCipher & cipher() const
Definition: cfb.h:48
std::string to_string(const BER_Object &obj)
Definition: asn1_obj.cpp:213

Member Function Documentation

◆ authenticated()

virtual bool Botan::Cipher_Mode::authenticated ( ) const
inlinevirtualinherited
Returns
true iff this mode provides authentication as well as confidentiality.

Reimplemented in Botan::AEAD_Mode.

Definition at line 169 of file cipher_mode.h.

169{ return false; }

◆ block_size()

size_t Botan::CFB_Mode::block_size ( ) const
inlineprotected

Definition at line 49 of file cfb.h.

49{ return m_block_size; }

Referenced by default_nonce_length(), name(), shift_register(), and valid_nonce_length().

◆ cipher()

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

Definition at line 48 of file cfb.h.

48{ return *m_cipher; }

Referenced by key_spec(), name(), and shift_register().

◆ clear()

void Botan::CFB_Mode::clear ( )
finaloverridevirtual

Reset the state.

Implements Botan::SymmetricAlgorithm.

Definition at line 23 of file cfb.cpp.

24 {
25 m_cipher->clear();
26 m_keystream.clear();
27 reset();
28 }
secure_vector< uint8_t > m_keystream
Definition: cfb.h:52
void reset() override final
Definition: cfb.cpp:30

References m_keystream, and 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
algothe algorithm to create
directionspecify if this should be an encryption or decryption AEAD
provideroptional specification for provider to use
Returns
an AEAD mode or a null pointer if not available

Definition at line 54 of file cipher_mode.cpp.

57 {
58#if defined(BOTAN_HAS_COMMONCRYPTO)
59 if(provider.empty() || provider == "commoncrypto")
60 {
61 std::unique_ptr<Cipher_Mode> commoncrypto_cipher(make_commoncrypto_cipher_mode(algo, direction));
62
63 if(commoncrypto_cipher)
64 return commoncrypto_cipher;
65
66 if(!provider.empty())
67 return std::unique_ptr<Cipher_Mode>();
68 }
69#endif
70
71#if defined(BOTAN_HAS_OPENSSL)
72 if(provider.empty() || provider == "openssl")
73 {
74 std::unique_ptr<Cipher_Mode> openssl_cipher(make_openssl_cipher_mode(algo, direction));
75
76 if(openssl_cipher)
77 return openssl_cipher;
78
79 if(!provider.empty())
80 return std::unique_ptr<Cipher_Mode>();
81 }
82#endif
83
84#if defined(BOTAN_HAS_STREAM_CIPHER)
85 if(auto sc = StreamCipher::create(algo))
86 {
87 return std::unique_ptr<Cipher_Mode>(new Stream_Cipher_Mode(sc.release()));
88 }
89#endif
90
91#if defined(BOTAN_HAS_AEAD_MODES)
92 if(auto aead = AEAD_Mode::create(algo, direction))
93 {
94 return std::unique_ptr<Cipher_Mode>(aead.release());
95 }
96#endif
97
98 if(algo.find('/') != std::string::npos)
99 {
100 const std::vector<std::string> algo_parts = split_on(algo, '/');
101 const std::string cipher_name = algo_parts[0];
102 const std::vector<std::string> mode_info = parse_algorithm_name(algo_parts[1]);
103
104 if(mode_info.empty())
105 return std::unique_ptr<Cipher_Mode>();
106
107 std::ostringstream alg_args;
108
109 alg_args << '(' << cipher_name;
110 for(size_t i = 1; i < mode_info.size(); ++i)
111 alg_args << ',' << mode_info[i];
112 for(size_t i = 2; i < algo_parts.size(); ++i)
113 alg_args << ',' << algo_parts[i];
114 alg_args << ')';
115
116 const std::string mode_name = mode_info[0] + alg_args.str();
117 return Cipher_Mode::create(mode_name, direction, provider);
118 }
119
120#if defined(BOTAN_HAS_BLOCK_CIPHER)
121
122 SCAN_Name spec(algo);
123
124 if(spec.arg_count() == 0)
125 {
126 return std::unique_ptr<Cipher_Mode>();
127 }
128
129 std::unique_ptr<BlockCipher> bc(BlockCipher::create(spec.arg(0), provider));
130
131 if(!bc)
132 {
133 return std::unique_ptr<Cipher_Mode>();
134 }
135
136#if defined(BOTAN_HAS_MODE_CBC)
137 if(spec.algo_name() == "CBC")
138 {
139 const std::string padding = spec.arg(1, "PKCS7");
140
141 if(padding == "CTS")
142 {
143 if(direction == ENCRYPTION)
144 return std::unique_ptr<Cipher_Mode>(new CTS_Encryption(bc.release()));
145 else
146 return std::unique_ptr<Cipher_Mode>(new CTS_Decryption(bc.release()));
147 }
148 else
149 {
150 std::unique_ptr<BlockCipherModePaddingMethod> pad(get_bc_pad(padding));
151
152 if(pad)
153 {
154 if(direction == ENCRYPTION)
155 return std::unique_ptr<Cipher_Mode>(new CBC_Encryption(bc.release(), pad.release()));
156 else
157 return std::unique_ptr<Cipher_Mode>(new CBC_Decryption(bc.release(), pad.release()));
158 }
159 }
160 }
161#endif
162
163#if defined(BOTAN_HAS_MODE_XTS)
164 if(spec.algo_name() == "XTS")
165 {
166 if(direction == ENCRYPTION)
167 return std::unique_ptr<Cipher_Mode>(new XTS_Encryption(bc.release()));
168 else
169 return std::unique_ptr<Cipher_Mode>(new XTS_Decryption(bc.release()));
170 }
171#endif
172
173#if defined(BOTAN_HAS_MODE_CFB)
174 if(spec.algo_name() == "CFB")
175 {
176 const size_t feedback_bits = spec.arg_as_integer(1, 8*bc->block_size());
177 if(direction == ENCRYPTION)
178 return std::unique_ptr<Cipher_Mode>(new CFB_Encryption(bc.release(), feedback_bits));
179 else
180 return std::unique_ptr<Cipher_Mode>(new CFB_Decryption(bc.release(), feedback_bits));
181 }
182#endif
183
184#endif
185
186 return std::unique_ptr<Cipher_Mode>();
187 }
static std::unique_ptr< AEAD_Mode > create(const std::string &algo, Cipher_Dir direction, const std::string &provider="")
Definition: aead.cpp:60
static std::unique_ptr< BlockCipher > create(const std::string &algo_spec, const std::string &provider="")
virtual std::string provider() const
Definition: cipher_mode.h:180
static std::unique_ptr< Cipher_Mode > create(const std::string &algo, Cipher_Dir direction, const std::string &provider="")
Definition: cipher_mode.cpp:54
static std::unique_ptr< StreamCipher > create(const std::string &algo_spec, const std::string &provider="")
std::vector< std::string > split_on(const std::string &str, char delim)
Definition: parsing.cpp:148
BlockCipherModePaddingMethod * get_bc_pad(const std::string &algo_spec)
Definition: mode_pad.cpp:18
Cipher_Mode * make_openssl_cipher_mode(const std::string &name, Cipher_Dir direction)
@ ENCRYPTION
Definition: cipher_mode.h:23
Cipher_Mode * make_commoncrypto_cipher_mode(const std::string &name, Cipher_Dir direction)
std::vector< std::string > parse_algorithm_name(const std::string &namex)
Definition: parsing.cpp:95

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::BlockCipher::create(), Botan::StreamCipher::create(), Botan::ENCRYPTION, Botan::get_bc_pad(), Botan::make_commoncrypto_cipher_mode(), Botan::make_openssl_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
algothe algorithm to create
directionspecify if this should be an encryption or decryption AEAD
provideroptional specification for provider to use
Returns
an AEAD mode, or throw an exception

Definition at line 44 of file cipher_mode.cpp.

47 {
48 if(auto mode = Cipher_Mode::create(algo, direction, provider))
49 return mode;
50
51 throw Lookup_Error("Cipher mode", algo, provider);
52 }

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
finaloverridevirtual
Returns
the default size for a nonce

Implements Botan::Cipher_Mode.

Definition at line 64 of file cfb.cpp.

65 {
66 return block_size();
67 }
size_t block_size() const
Definition: cfb.h:49

References block_size().

◆ feedback()

size_t Botan::CFB_Mode::feedback ( ) const
inlineprotected

Definition at line 47 of file cfb.h.

47{ return m_feedback_bytes; }

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

◆ finish()

virtual void Botan::Cipher_Mode::finish ( secure_vector< uint8_t > &  final_block,
size_t  offset = 0 
)
pure virtualinherited

◆ key_spec()

Key_Length_Specification Botan::CFB_Mode::key_spec ( ) const
finaloverridevirtual
Returns
object describing limits on key size

Implements Botan::SymmetricAlgorithm.

Definition at line 59 of file cfb.cpp.

60 {
61 return cipher().key_spec();
62 }
virtual Key_Length_Specification key_spec() const =0

References 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.

121 {
122 return key_spec().maximum_keylength();
123 }
size_t maximum_keylength() const
Definition: sym_algo.h:70

◆ minimum_final_size()

size_t Botan::CFB_Mode::minimum_final_size ( ) const
finaloverridevirtual
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.

55 {
56 return 0;
57 }

◆ minimum_keylength()

size_t Botan::SymmetricAlgorithm::minimum_keylength ( ) const
inlineinherited
Returns
minimum allowed key length

Definition at line 128 of file sym_algo.h.

129 {
130 return key_spec().minimum_keylength();
131 }
size_t minimum_keylength() const
Definition: sym_algo.h:62

Referenced by botan_block_cipher_get_keyspec(), and botan_mac_get_keyspec().

◆ name()

std::string Botan::CFB_Mode::name ( ) const
finaloverridevirtual
Returns
the algorithm name

Implements Botan::SymmetricAlgorithm.

Definition at line 36 of file cfb.cpp.

37 {
38 if(feedback() == cipher().block_size())
39 return cipher().name() + "/CFB";
40 else
41 return cipher().name() + "/CFB(" + std::to_string(feedback()*8) + ")";
42 }
virtual std::string name() const =0

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

◆ output_length()

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

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.

45 {
46 return input_length;
47 }

◆ process()

virtual size_t Botan::Cipher_Mode::process ( uint8_t  msg[],
size_t  msg_len 
)
pure virtualinherited

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
msgthe message to be processed
msg_lenlength of the message in bytes

Implemented in Botan::ChaCha20Poly1305_Encryption, Botan::ChaCha20Poly1305_Decryption, Botan::EAX_Encryption, Botan::EAX_Decryption, Botan::GCM_Encryption, Botan::GCM_Decryption, Botan::OCB_Encryption, Botan::OCB_Decryption, Botan::SIV_Mode, Botan::CBC_Encryption, Botan::CBC_Decryption, Botan::CFB_Encryption, Botan::CFB_Decryption, Botan::XTS_Encryption, Botan::XTS_Decryption, Botan::CCM_Mode, and Botan::TLS::TLS_CBC_HMAC_AEAD_Mode.

◆ 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.

180{ 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_specalgorithm name

Definition at line 190 of file cipher_mode.cpp.

191 {
192 const std::vector<std::string>& possible = { "base", "openssl", "commoncrypto" };
193 std::vector<std::string> providers;
194 for(auto&& prov : possible)
195 {
196 std::unique_ptr<Cipher_Mode> mode = Cipher_Mode::create(algo_spec, ENCRYPTION, prov);
197 if(mode)
198 {
199 providers.push_back(prov); // available
200 }
201 }
202 return providers;
203 }
static std::vector< std::string > providers(const std::string &algo_spec)

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

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

◆ reset()

void Botan::CFB_Mode::reset ( )
finaloverridevirtual

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.

31 {
32 m_state.clear();
34 }
secure_vector< uint8_t > m_state
Definition: cfb.h:51
void zeroise(std::vector< T, Alloc > &vec)
Definition: secmem.h:117

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

Referenced by 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.

154 {
155 set_key(key.data(), key.size());
156 }
void set_key(const SymmetricKey &key)
Definition: sym_algo.h:147

◆ set_key() [2/3]

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

◆ 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
keythe to be set as a byte array.
lengthin bytes of key param

Definition at line 17 of file sym_algo.cpp.

18 {
19 if(!valid_keylength(length))
20 throw Invalid_Key_Length(name(), length);
21 key_schedule(key, length);
22 }
bool valid_keylength(size_t length) const
Definition: sym_algo.h:138

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

◆ shift_register()

void Botan::CFB_Mode::shift_register ( )
protected

Definition at line 103 of file cfb.cpp.

104 {
105 const size_t shift = feedback();
106 const size_t carryover = block_size() - shift;
107
108 if(carryover > 0)
109 {
110 copy_mem(m_state.data(), &m_state[shift], carryover);
111 }
112 copy_mem(&m_state[carryover], m_keystream.data(), shift);
114 m_keystream_pos = 0;
115 }
void encrypt(const uint8_t in[], uint8_t out[]) const
Definition: block_cipher.h:82
size_t m_keystream_pos
Definition: cfb.h:53
void copy_mem(T *out, const T *in, size_t n)
Definition: mem_ops.h:133

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

Referenced by Botan::CFB_Encryption::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.

88 {
89 return start_msg(nullptr, 0);
90 }
virtual void start_msg(const uint8_t nonce[], size_t nonce_len)=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
noncethe per message nonce

Definition at line 69 of file cipher_mode.h.

70 {
71 start_msg(nonce.data(), nonce.size());
72 }

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
noncethe per message nonce
nonce_lenlength of nonce

Definition at line 79 of file cipher_mode.h.

80 {
81 start_msg(nonce, nonce_len);
82 }

◆ tag_size()

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

◆ 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
bufferin/out parameter which will possibly be resized
offsetan offset into blocks to begin processing

Definition at line 112 of file cipher_mode.h.

113 {
114 BOTAN_ASSERT(buffer.size() >= offset, "Offset ok");
115 uint8_t* buf = buffer.data() + offset;
116 const size_t buf_size = buffer.size() - offset;
117
118 const size_t written = process(buf, buf_size);
119 buffer.resize(offset + written);
120 }
#define BOTAN_ASSERT(expr, assertion_made)
Definition: assert.h:55
virtual size_t process(uint8_t msg[], size_t msg_len)=0

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(), Botan::CFB_Encryption::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
finaloverridevirtual
Returns
size of required blocks to update

Implements Botan::Cipher_Mode.

Definition at line 49 of file cfb.cpp.

50 {
51 return feedback();
52 }

References 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
lengththe key length to be checked.
Returns
true if the key length is valid.

Definition at line 138 of file sym_algo.h.

139 {
140 return key_spec().valid_keylength(length);
141 }
bool valid_keylength(size_t length) const
Definition: sym_algo.h:52

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

◆ valid_nonce_length()

bool Botan::CFB_Mode::valid_nonce_length ( size_t  nonce_len) const
finaloverridevirtual
Returns
true iff nonce_len is a valid length for the nonce

Implements Botan::Cipher_Mode.

Definition at line 69 of file cfb.cpp.

70 {
71 return (n == 0 || n == block_size());
72 }

References block_size().

◆ verify_key_set()

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

Definition at line 171 of file sym_algo.h.

172 {
173 if(cond == false)
174 throw_key_not_set_error();
175 }

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::CAST_256::decrypt_n(), Botan::DES::decrypt_n(), Botan::TripleDES::decrypt_n(), Botan::DESX::decrypt_n(), Botan::GOST_28147_89::decrypt_n(), Botan::IDEA::decrypt_n(), Botan::KASUMI::decrypt_n(), Botan::Lion::decrypt_n(), Botan::MISTY1::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::XTEA::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::CAST_256::encrypt_n(), Botan::DES::encrypt_n(), Botan::TripleDES::encrypt_n(), Botan::DESX::encrypt_n(), Botan::GOST_28147_89::encrypt_n(), Botan::IDEA::encrypt_n(), Botan::KASUMI::encrypt_n(), Botan::Lion::encrypt_n(), Botan::MISTY1::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::XTEA::encrypt_n(), Botan::OCB_Encryption::finish(), Botan::OCB_Decryption::finish(), Botan::GHASH::ghash_update(), Botan::CFB_Encryption::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
protected

◆ m_keystream_pos

size_t Botan::CFB_Mode::m_keystream_pos = 0
protected

◆ m_state

secure_vector<uint8_t> Botan::CFB_Mode::m_state
protected

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