Botan 3.0.0
Crypto and TLS for C&
Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions | List of all members
Botan::SM4 Class Referencefinal

#include <sm4.h>

Inheritance diagram for Botan::SM4:
Botan::Block_Cipher_Fixed_Params< 16, 16 > Botan::BlockCipher Botan::SymmetricAlgorithm

Public Types

enum  
 

Public Member Functions

size_t block_size () const final override
 
void clear () override
 
BlockCipherclone () const
 
void decrypt (const uint8_t in[], uint8_t out[]) const
 
void decrypt (std::span< const uint8_t > in, std::span< uint8_t > out) const
 
void decrypt (std::span< uint8_t > block) const
 
void decrypt (uint8_t block[]) const
 
void decrypt_n (const uint8_t in[], uint8_t out[], size_t blocks) const override
 
void decrypt_n_xex (uint8_t data[], const uint8_t mask[], size_t blocks) const final override
 
void encrypt (const uint8_t in[], uint8_t out[]) const
 
void encrypt (std::span< const uint8_t > in, std::span< uint8_t > out) const
 
void encrypt (std::span< uint8_t > block) const
 
void encrypt (uint8_t block[]) const
 
void encrypt_n (const uint8_t in[], uint8_t out[], size_t blocks) const override
 
void encrypt_n_xex (uint8_t data[], const uint8_t mask[], size_t blocks) const final override
 
bool has_keying_material () const override
 
Key_Length_Specification key_spec () const final override
 
size_t maximum_keylength () const
 
size_t minimum_keylength () const
 
std::string name () const override
 
std::unique_ptr< BlockCiphernew_object () const override
 
size_t parallel_bytes () const
 
size_t parallelism () const override
 
std::string provider () const override
 
void set_key (const SymmetricKey &key)
 
void set_key (const uint8_t key[], size_t length)
 
void set_key (std::span< const uint8_t > key)
 
bool valid_keylength (size_t length) const
 

Static Public Member Functions

static std::unique_ptr< BlockCiphercreate (std::string_view algo_spec, std::string_view provider="")
 
static std::unique_ptr< BlockCiphercreate_or_throw (std::string_view algo_spec, std::string_view provider="")
 
static std::vector< std::string > providers (std::string_view algo_spec)
 

Protected Member Functions

void assert_key_material_set () const
 
void assert_key_material_set (bool predicate) const
 

Detailed Description

SM4

Definition at line 18 of file sm4.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum
inherited

Definition at line 224 of file block_cipher.h.

Member Function Documentation

◆ assert_key_material_set() [1/2]

void Botan::SymmetricAlgorithm::assert_key_material_set ( ) const
inlineprotectedinherited

Definition at line 182 of file sym_algo.h.

183 {
185 }
virtual bool has_keying_material() const =0
void assert_key_material_set() const
Definition: sym_algo.h:182

Referenced by Botan::Salsa20::cipher_bytes(), 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(), 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(), encrypt_n(), Botan::Threefish_512::encrypt_n(), Botan::Twofish::encrypt_n(), Botan::GHASH::final(), Botan::GHASH::ghash_update(), Botan::ChaCha::seek(), Botan::CTR_BE::seek(), Botan::Salsa20::seek(), Botan::OCB_Mode::set_associated_data_n(), Botan::Salsa20::set_iv_bytes(), Botan::GHASH::update(), and Botan::GHASH::update_associated_data().

◆ assert_key_material_set() [2/2]

void Botan::SymmetricAlgorithm::assert_key_material_set ( bool  predicate) const
inlineprotectedinherited

Definition at line 187 of file sym_algo.h.

188 {
189 if(!predicate)
190 throw_key_not_set_error();
191 }

◆ block_size()

size_t Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 , BlockCipher >::block_size ( ) const
inlinefinaloverridevirtualinherited
Returns
block size of this algorithm

Implements Botan::BlockCipher.

Definition at line 225 of file block_cipher.h.

225{ return BS; }

◆ clear()

void Botan::SM4::clear ( )
overridevirtual

Reset the internal state. This includes not just the key, but any partial message that may have been in process.

Implements Botan::SymmetricAlgorithm.

Definition at line 341 of file sm4.cpp.

342 {
343 zap(m_RK);
344 }
void zap(std::vector< T, Alloc > &vec)
Definition: secmem.h:129

References Botan::zap().

◆ clone()

BlockCipher * Botan::BlockCipher::clone ( ) const
inlineinherited

Definition at line 193 of file block_cipher.h.

194 {
195 return this->new_object().release();
196 }
virtual std::unique_ptr< BlockCipher > new_object() const =0

◆ create()

std::unique_ptr< BlockCipher > Botan::BlockCipher::create ( std::string_view  algo_spec,
std::string_view  provider = "" 
)
staticinherited

Create an instance based on a name If provider is empty then best available is chosen.

Parameters
algo_specalgorithm name
providerprovider implementation to choose
Returns
a null pointer if the algo/provider combination cannot be found

Definition at line 87 of file block_cipher.cpp.

89 {
90#if defined(BOTAN_HAS_COMMONCRYPTO)
91 if(provider.empty() || provider == "commoncrypto")
92 {
93 if(auto bc = make_commoncrypto_block_cipher(algo))
94 return bc;
95
96 if(!provider.empty())
97 return nullptr;
98 }
99#endif
100
101 // TODO: CryptoAPI
102 // TODO: /dev/crypto
103
104 // Only base providers from here on out
105 if(provider.empty() == false && provider != "base")
106 return nullptr;
107
108#if defined(BOTAN_HAS_AES)
109 if(algo == "AES-128")
110 {
111 return std::make_unique<AES_128>();
112 }
113
114 if(algo == "AES-192")
115 {
116 return std::make_unique<AES_192>();
117 }
118
119 if(algo == "AES-256")
120 {
121 return std::make_unique<AES_256>();
122 }
123#endif
124
125#if defined(BOTAN_HAS_ARIA)
126 if(algo == "ARIA-128")
127 {
128 return std::make_unique<ARIA_128>();
129 }
130
131 if(algo == "ARIA-192")
132 {
133 return std::make_unique<ARIA_192>();
134 }
135
136 if(algo == "ARIA-256")
137 {
138 return std::make_unique<ARIA_256>();
139 }
140#endif
141
142#if defined(BOTAN_HAS_SERPENT)
143 if(algo == "Serpent")
144 {
145 return std::make_unique<Serpent>();
146 }
147#endif
148
149#if defined(BOTAN_HAS_SHACAL2)
150 if(algo == "SHACAL2")
151 {
152 return std::make_unique<SHACAL2>();
153 }
154#endif
155
156#if defined(BOTAN_HAS_TWOFISH)
157 if(algo == "Twofish")
158 {
159 return std::make_unique<Twofish>();
160 }
161#endif
162
163#if defined(BOTAN_HAS_THREEFISH_512)
164 if(algo == "Threefish-512")
165 {
166 return std::make_unique<Threefish_512>();
167 }
168#endif
169
170#if defined(BOTAN_HAS_BLOWFISH)
171 if(algo == "Blowfish")
172 {
173 return std::make_unique<Blowfish>();
174 }
175#endif
176
177#if defined(BOTAN_HAS_CAMELLIA)
178 if(algo == "Camellia-128")
179 {
180 return std::make_unique<Camellia_128>();
181 }
182
183 if(algo == "Camellia-192")
184 {
185 return std::make_unique<Camellia_192>();
186 }
187
188 if(algo == "Camellia-256")
189 {
190 return std::make_unique<Camellia_256>();
191 }
192#endif
193
194#if defined(BOTAN_HAS_DES)
195 if(algo == "DES")
196 {
197 return std::make_unique<DES>();
198 }
199
200 if(algo == "TripleDES" || algo == "3DES" || algo == "DES-EDE")
201 {
202 return std::make_unique<TripleDES>();
203 }
204#endif
205
206#if defined(BOTAN_HAS_NOEKEON)
207 if(algo == "Noekeon")
208 {
209 return std::make_unique<Noekeon>();
210 }
211#endif
212
213#if defined(BOTAN_HAS_CAST_128)
214 if(algo == "CAST-128" || algo == "CAST5")
215 {
216 return std::make_unique<CAST_128>();
217 }
218#endif
219
220#if defined(BOTAN_HAS_IDEA)
221 if(algo == "IDEA")
222 {
223 return std::make_unique<IDEA>();
224 }
225#endif
226
227#if defined(BOTAN_HAS_SEED)
228 if(algo == "SEED")
229 {
230 return std::make_unique<SEED>();
231 }
232#endif
233
234#if defined(BOTAN_HAS_SM4)
235 if(algo == "SM4")
236 {
237 return std::make_unique<SM4>();
238 }
239#endif
240
241 const SCAN_Name req(algo);
242
243#if defined(BOTAN_HAS_GOST_28147_89)
244 if(req.algo_name() == "GOST-28147-89")
245 {
246 return std::make_unique<GOST_28147_89>(req.arg(0, "R3411_94_TestParam"));
247 }
248#endif
249
250#if defined(BOTAN_HAS_CASCADE)
251 if(req.algo_name() == "Cascade" && req.arg_count() == 2)
252 {
253 auto c1 = BlockCipher::create(req.arg(0));
254 auto c2 = BlockCipher::create(req.arg(1));
255
256 if(c1 && c2)
257 return std::make_unique<Cascade_Cipher>(std::move(c1), std::move(c2));
258 }
259#endif
260
261#if defined(BOTAN_HAS_LION)
262 if(req.algo_name() == "Lion" && req.arg_count_between(2, 3))
263 {
264 auto hash = HashFunction::create(req.arg(0));
265 auto stream = StreamCipher::create(req.arg(1));
266
267 if(hash && stream)
268 {
269 const size_t block_size = req.arg_as_integer(2, 1024);
270 return std::make_unique<Lion>(std::move(hash), std::move(stream), block_size);
271 }
272 }
273#endif
274
275 BOTAN_UNUSED(req);
277
278 return nullptr;
279 }
#define BOTAN_UNUSED(...)
Definition: assert.h:141
static std::unique_ptr< BlockCipher > create(std::string_view algo_spec, std::string_view provider="")
virtual size_t block_size() const =0
virtual std::string provider() const
Definition: block_cipher.h:74
static std::unique_ptr< HashFunction > create(std::string_view algo_spec, std::string_view provider="")
Definition: hash.cpp:102
static std::unique_ptr< StreamCipher > create(std::string_view algo_spec, std::string_view provider="")
std::unique_ptr< BlockCipher > make_commoncrypto_block_cipher(std::string_view name)

References Botan::SCAN_Name::algo_name(), Botan::SCAN_Name::arg(), Botan::SCAN_Name::arg_as_integer(), Botan::SCAN_Name::arg_count(), Botan::SCAN_Name::arg_count_between(), Botan::BlockCipher::block_size(), BOTAN_UNUSED, Botan::BlockCipher::create(), Botan::HashFunction::create(), Botan::StreamCipher::create(), Botan::make_commoncrypto_block_cipher(), and Botan::BlockCipher::provider().

Referenced by botan_block_cipher_init(), Botan::AEAD_Mode::create(), Botan::Cipher_Mode::create(), Botan::BlockCipher::create(), Botan::MessageAuthenticationCode::create(), Botan::StreamCipher::create(), and Botan::BlockCipher::create_or_throw().

◆ create_or_throw()

std::unique_ptr< BlockCipher > Botan::BlockCipher::create_or_throw ( std::string_view  algo_spec,
std::string_view  provider = "" 
)
staticinherited

Create an instance based on a name, or throw if the algo/provider combination cannot be found. If provider is empty then best available is chosen.

Definition at line 283 of file block_cipher.cpp.

285 {
286 if(auto bc = BlockCipher::create(algo, provider))
287 {
288 return bc;
289 }
290 throw Lookup_Error("Block cipher", algo, provider);
291 }

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

Referenced by botan_nist_kw_dec(), botan_nist_kw_enc(), Botan::TLS::Connection_Cipher_State::Connection_Cipher_State(), Botan::Encrypted_PSK_Database::Encrypted_PSK_Database(), Botan::rfc3394_keyunwrap(), and Botan::rfc3394_keywrap().

◆ decrypt() [1/4]

void Botan::BlockCipher::decrypt ( const uint8_t  in[],
uint8_t  out[] 
) const
inlineinherited

Decrypt a block.

Parameters
inThe ciphertext block to be decypted as a byte array. Must be of length block_size().
outThe byte array designated to hold the decrypted block. Must be of length block_size().

Definition at line 93 of file block_cipher.h.

94 { decrypt_n(in, out, 1); }
virtual void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const =0

Referenced by Botan::nist_key_unwrap(), and Botan::nist_key_unwrap_padded().

◆ decrypt() [2/4]

void Botan::BlockCipher::decrypt ( std::span< const uint8_t >  in,
std::span< uint8_t >  out 
) const
inlineinherited

Decrypt one or more blocks

Parameters
inthe input buffer (multiple of block_size())
outthe output buffer (same size as in)

Definition at line 145 of file block_cipher.h.

146 {
147 return decrypt_n(in.data(), out.data(), in.size() / block_size());
148 }

◆ decrypt() [3/4]

void Botan::BlockCipher::decrypt ( std::span< uint8_t >  block) const
inlineinherited

Decrypt one or more blocks

Parameters
blockthe input/output buffer (multiple of block_size())

Definition at line 125 of file block_cipher.h.

126 {
127 return decrypt_n(block.data(), block.data(), block.size() / block_size());
128 }

◆ decrypt() [4/4]

void Botan::BlockCipher::decrypt ( uint8_t  block[]) const
inlineinherited

Decrypt a block.

Parameters
blockthe ciphertext block to be decrypted Must be of length block_size(). Will hold the result when the function has finished.

Definition at line 110 of file block_cipher.h.

110{ decrypt_n(block, block, 1); }

◆ decrypt_n()

void Botan::SM4::decrypt_n ( const uint8_t  in[],
uint8_t  out[],
size_t  blocks 
) const
overridevirtual

Decrypt one or more blocks

Parameters
inthe input buffer (multiple of block_size())
outthe output buffer (same size as in)
blocksthe number of blocks to process

Implements Botan::BlockCipher.

Definition at line 243 of file sm4.cpp.

244 {
246
247#if defined(BOTAN_HAS_SM4_ARMV8)
248 if(CPUID::has_arm_sm4())
249 return sm4_armv8_decrypt(in, out, blocks);
250#endif
251
252 while(blocks >= 2)
253 {
254 uint32_t B0 = load_be<uint32_t>(in, 0);
255 uint32_t B1 = load_be<uint32_t>(in, 1);
256 uint32_t B2 = load_be<uint32_t>(in, 2);
257 uint32_t B3 = load_be<uint32_t>(in, 3);
258
259 uint32_t C0 = load_be<uint32_t>(in, 4);
260 uint32_t C1 = load_be<uint32_t>(in, 5);
261 uint32_t C2 = load_be<uint32_t>(in, 6);
262 uint32_t C3 = load_be<uint32_t>(in, 7);
263
264 SM4_D<7>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T_slow);
265 SM4_D<6>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
266 SM4_D<5>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
267 SM4_D<4>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
268 SM4_D<3>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
269 SM4_D<2>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
270 SM4_D<1>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
271 SM4_D<0>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T_slow);
272
273 store_be(out, B3, B2, B1, B0, C3, C2, C1, C0);
274
275 in += 2*BLOCK_SIZE;
276 out += 2*BLOCK_SIZE;
277 blocks -= 2;
278 }
279
280 for(size_t i = 0; i != blocks; ++i)
281 {
282 uint32_t B0 = load_be<uint32_t>(in, 0);
283 uint32_t B1 = load_be<uint32_t>(in, 1);
284 uint32_t B2 = load_be<uint32_t>(in, 2);
285 uint32_t B3 = load_be<uint32_t>(in, 3);
286
287 SM4_D<7>(B0, B1, B2, B3, m_RK, SM4_T_slow);
288 SM4_D<6>(B0, B1, B2, B3, m_RK, SM4_T);
289 SM4_D<5>(B0, B1, B2, B3, m_RK, SM4_T);
290 SM4_D<4>(B0, B1, B2, B3, m_RK, SM4_T);
291 SM4_D<3>(B0, B1, B2, B3, m_RK, SM4_T);
292 SM4_D<2>(B0, B1, B2, B3, m_RK, SM4_T);
293 SM4_D<1>(B0, B1, B2, B3, m_RK, SM4_T);
294 SM4_D<0>(B0, B1, B2, B3, m_RK, SM4_T_slow);
295
296 store_be(out, B3, B2, B1, B0);
297
298 in += BLOCK_SIZE;
299 out += BLOCK_SIZE;
300 }
301 }
constexpr uint32_t load_be< uint32_t >(const uint8_t in[], size_t off)
Definition: loadstor.h:190
constexpr void store_be(uint16_t in, uint8_t out[2])
Definition: loadstor.h:449

References Botan::SymmetricAlgorithm::assert_key_material_set(), Botan::Block_Cipher_Fixed_Params< 16, 16 >::BLOCK_SIZE, Botan::load_be< uint32_t >(), and Botan::store_be().

◆ decrypt_n_xex()

void Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 , BlockCipher >::decrypt_n_xex ( uint8_t  data[],
const uint8_t  mask[],
size_t  blocks 
) const
inlinefinaloverridevirtualinherited

Reimplemented from Botan::BlockCipher.

Definition at line 237 of file block_cipher.h.

240 {
241 xor_buf(data, mask, blocks * BS);
242 this->decrypt_n(data, data, blocks);
243 xor_buf(data, mask, blocks * BS);
244 }
void xor_buf(uint8_t out[], const uint8_t in[], size_t length)
Definition: mem_ops.h:255

◆ encrypt() [1/4]

void Botan::BlockCipher::encrypt ( const uint8_t  in[],
uint8_t  out[] 
) const
inlineinherited

Encrypt a block.

Parameters
inThe plaintext block to be encrypted as a byte array. Must be of length block_size().
outThe byte array designated to hold the encrypted block. Must be of length block_size().

Definition at line 83 of file block_cipher.h.

84 { encrypt_n(in, out, 1); }
virtual void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const =0

Referenced by Botan::nist_key_wrap(), Botan::nist_key_wrap_padded(), and Botan::CFB_Mode::shift_register().

◆ encrypt() [2/4]

void Botan::BlockCipher::encrypt ( std::span< const uint8_t >  in,
std::span< uint8_t >  out 
) const
inlineinherited

Encrypt one or more blocks

Parameters
inthe input buffer (multiple of block_size())
outthe output buffer (same size as in)

Definition at line 135 of file block_cipher.h.

136 {
137 return encrypt_n(in.data(), out.data(), in.size() / block_size());
138 }

◆ encrypt() [3/4]

void Botan::BlockCipher::encrypt ( std::span< uint8_t >  block) const
inlineinherited

Encrypt one or more blocks

Parameters
blockthe input/output buffer (multiple of block_size())

Definition at line 116 of file block_cipher.h.

117 {
118 return encrypt_n(block.data(), block.data(), block.size() / block_size());
119 }

◆ encrypt() [4/4]

void Botan::BlockCipher::encrypt ( uint8_t  block[]) const
inlineinherited

Encrypt a block.

Parameters
blockthe plaintext block to be encrypted Must be of length block_size(). Will hold the result when the function has finished.

Definition at line 102 of file block_cipher.h.

102{ encrypt_n(block, block, 1); }

◆ encrypt_n()

void Botan::SM4::encrypt_n ( const uint8_t  in[],
uint8_t  out[],
size_t  blocks 
) const
overridevirtual

Encrypt one or more blocks

Parameters
inthe input buffer (multiple of block_size())
outthe output buffer (same size as in)
blocksthe number of blocks to process

Implements Botan::BlockCipher.

Definition at line 180 of file sm4.cpp.

181 {
183
184#if defined(BOTAN_HAS_SM4_ARMV8)
185 if(CPUID::has_arm_sm4())
186 return sm4_armv8_encrypt(in, out, blocks);
187#endif
188
189 while(blocks >= 2)
190 {
191 uint32_t B0 = load_be<uint32_t>(in, 0);
192 uint32_t B1 = load_be<uint32_t>(in, 1);
193 uint32_t B2 = load_be<uint32_t>(in, 2);
194 uint32_t B3 = load_be<uint32_t>(in, 3);
195
196 uint32_t C0 = load_be<uint32_t>(in, 4);
197 uint32_t C1 = load_be<uint32_t>(in, 5);
198 uint32_t C2 = load_be<uint32_t>(in, 6);
199 uint32_t C3 = load_be<uint32_t>(in, 7);
200
201 SM4_E<0>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T_slow);
202 SM4_E<1>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
203 SM4_E<2>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
204 SM4_E<3>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
205 SM4_E<4>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
206 SM4_E<5>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
207 SM4_E<6>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T);
208 SM4_E<7>(B0, B1, B2, B3, C0, C1, C2, C3, m_RK, SM4_T_slow);
209
210 store_be(out, B3, B2, B1, B0, C3, C2, C1, C0);
211
212 in += 2*BLOCK_SIZE;
213 out += 2*BLOCK_SIZE;
214 blocks -= 2;
215 }
216
217 for(size_t i = 0; i != blocks; ++i)
218 {
219 uint32_t B0 = load_be<uint32_t>(in, 0);
220 uint32_t B1 = load_be<uint32_t>(in, 1);
221 uint32_t B2 = load_be<uint32_t>(in, 2);
222 uint32_t B3 = load_be<uint32_t>(in, 3);
223
224 SM4_E<0>(B0, B1, B2, B3, m_RK, SM4_T_slow);
225 SM4_E<1>(B0, B1, B2, B3, m_RK, SM4_T);
226 SM4_E<2>(B0, B1, B2, B3, m_RK, SM4_T);
227 SM4_E<3>(B0, B1, B2, B3, m_RK, SM4_T);
228 SM4_E<4>(B0, B1, B2, B3, m_RK, SM4_T);
229 SM4_E<5>(B0, B1, B2, B3, m_RK, SM4_T);
230 SM4_E<6>(B0, B1, B2, B3, m_RK, SM4_T);
231 SM4_E<7>(B0, B1, B2, B3, m_RK, SM4_T_slow);
232
233 store_be(out, B3, B2, B1, B0);
234
235 in += BLOCK_SIZE;
236 out += BLOCK_SIZE;
237 }
238 }

References Botan::SymmetricAlgorithm::assert_key_material_set(), Botan::Block_Cipher_Fixed_Params< 16, 16 >::BLOCK_SIZE, Botan::load_be< uint32_t >(), and Botan::store_be().

◆ encrypt_n_xex()

void Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 , BlockCipher >::encrypt_n_xex ( uint8_t  data[],
const uint8_t  mask[],
size_t  blocks 
) const
inlinefinaloverridevirtualinherited

Reimplemented from Botan::BlockCipher.

Definition at line 228 of file block_cipher.h.

231 {
232 xor_buf(data, mask, blocks * BS);
233 this->encrypt_n(data, data, blocks);
234 xor_buf(data, mask, blocks * BS);
235 }

◆ has_keying_material()

bool Botan::SM4::has_keying_material ( ) const
overridevirtual
Returns
true if a key has been set on this object

Implements Botan::SymmetricAlgorithm.

Definition at line 303 of file sm4.cpp.

304 {
305 return !m_RK.empty();
306 }

◆ key_spec()

Key_Length_Specification Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 , BlockCipher >::key_spec ( ) const
inlinefinaloverridevirtualinherited
Returns
object describing limits on key size

Implements Botan::SymmetricAlgorithm.

Definition at line 246 of file block_cipher.h.

247 {
248 return Key_Length_Specification(KMIN, KMAX, KMOD);
249 }

◆ maximum_keylength()

size_t Botan::SymmetricAlgorithm::maximum_keylength ( ) const
inlineinherited
Returns
maximum allowed key length

Definition at line 123 of file sym_algo.h.

124 {
125 return key_spec().maximum_keylength();
126 }
size_t maximum_keylength() const
Definition: sym_algo.h:72
virtual Key_Length_Specification key_spec() const =0

◆ minimum_keylength()

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

Definition at line 131 of file sym_algo.h.

132 {
133 return key_spec().minimum_keylength();
134 }
size_t minimum_keylength() const
Definition: sym_algo.h:64

◆ name()

std::string Botan::SM4::name ( ) const
inlineoverridevirtual
Returns
the algorithm name

Implements Botan::SymmetricAlgorithm.

Definition at line 25 of file sm4.h.

25{ return "SM4"; }

◆ new_object()

std::unique_ptr< BlockCipher > Botan::SM4::new_object ( ) const
inlineoverridevirtual
Returns
new object representing the same algorithm as *this

Implements Botan::BlockCipher.

Definition at line 26 of file sm4.h.

26{ return std::make_unique<SM4>(); }

◆ parallel_bytes()

size_t Botan::BlockCipher::parallel_bytes ( ) const
inlineinherited
Returns
prefererred parallelism of this cipher in bytes

Definition at line 65 of file block_cipher.h.

66 {
68 }
virtual size_t parallelism() const
Definition: block_cipher.h:60
#define BOTAN_BLOCK_CIPHER_PAR_MULT
Definition: build.h:420

References BOTAN_BLOCK_CIPHER_PAR_MULT.

Referenced by Botan::CBC_Mode::ideal_granularity().

◆ parallelism()

size_t Botan::SM4::parallelism ( ) const
overridevirtual
Returns
native parallelism of this cipher in blocks

Reimplemented from Botan::BlockCipher.

Definition at line 346 of file sm4.cpp.

347 {
348#if defined(BOTAN_HAS_SM4_ARMV8)
349 if(CPUID::has_arm_sm4())
350 {
351 return 4;
352 }
353#endif
354
355 return 1;
356 }

◆ provider()

std::string Botan::SM4::provider ( ) const
overridevirtual
Returns
provider information about this implementation. Default is "base", might also return "sse2", "avx2", "openssl", or some other arbitrary string.

Reimplemented from Botan::BlockCipher.

Definition at line 358 of file sm4.cpp.

359 {
360#if defined(BOTAN_HAS_SM4_ARMV8)
361 if(CPUID::has_arm_sm4())
362 {
363 return "armv8";
364 }
365#endif
366
367 return "base";
368 }

◆ providers()

std::vector< std::string > Botan::BlockCipher::providers ( std::string_view  algo_spec)
staticinherited
Returns
list of available providers for this algorithm, empty if not available
Parameters
algo_specalgorithm name

Definition at line 293 of file block_cipher.cpp.

294 {
295 return probe_providers_of<BlockCipher>(algo, { "base", "commoncrypto" });
296 }

◆ set_key() [1/3]

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

◆ set_key() [2/3]

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:141
virtual std::string name() const =0

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

◆ set_key() [3/3]

void Botan::SymmetricAlgorithm::set_key ( std::span< const uint8_t >  key)
inlineinherited

Set the symmetric key of this object.

Parameters
keythe contiguous byte range to be set.

Definition at line 159 of file sym_algo.h.

160 {
161 set_key(key.data(), key.size());
162 }

◆ 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 141 of file sym_algo.h.

142 {
143 return key_spec().valid_keylength(length);
144 }
bool valid_keylength(size_t length) const
Definition: sym_algo.h:54

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


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