Botan  1.10.9
Public Types | Public Member Functions | List of all members
Botan::AES_128_NI Class Reference

#include <aes_ni.h>

Inheritance diagram for Botan::AES_128_NI:
Botan::Block_Cipher_Fixed_Params< 16, 16 > Botan::BlockCipher Botan::SymmetricAlgorithm Botan::Algorithm

Public Types

enum  
 

Public Member Functions

 AES_128_NI ()
 
size_t block_size () const
 
void clear ()
 
BlockCipherclone () const
 
void decrypt (const byte in[], byte out[]) const
 
void decrypt (byte block[]) const
 
void decrypt_n (const byte in[], byte out[], size_t blocks) const
 
void encrypt (const byte in[], byte out[]) const
 
void encrypt (byte block[]) const
 
void encrypt_n (const byte in[], byte out[], size_t blocks) const
 
Key_Length_Specification key_spec () const
 
size_t maximum_keylength () const
 
size_t minimum_keylength () const
 
std::string name () const
 
size_t parallel_bytes () const
 
size_t parallelism () const
 
void set_key (const SymmetricKey &key)
 
void set_key (const byte key[], size_t length)
 
bool valid_keylength (size_t length) const
 

Detailed Description

AES-128 using AES-NI

Definition at line 18 of file aes_ni.h.

Member Enumeration Documentation

anonymous enum
inherited

Constructor & Destructor Documentation

Botan::AES_128_NI::AES_128_NI ( )
inline

Definition at line 30 of file aes_ni.h.

30 : EK(44), DK(44) { }

Member Function Documentation

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

Implements Botan::BlockCipher.

Definition at line 108 of file block_cipher.h.

108 { return BS; }
void Botan::AES_128_NI::clear ( )
virtual

Zeroize internal state

Implements Botan::Algorithm.

Definition at line 307 of file aes_ni.cpp.

References Botan::zeroise().

308  {
309  zeroise(EK);
310  zeroise(DK);
311  }
void zeroise(MemoryRegion< T > &vec)
Definition: secmem.h:415
BlockCipher* Botan::AES_128_NI::clone ( ) const
inlinevirtual

Get a new object representing the same algorithm as *this

Implements Botan::BlockCipher.

Definition at line 28 of file aes_ni.h.

28 { return new AES_128_NI; }
void Botan::BlockCipher::decrypt ( const byte  in[],
byte  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 57 of file block_cipher.h.

Referenced by Botan::DESX::decrypt_n().

58  { decrypt_n(in, out, 1); }
virtual void decrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::BlockCipher::decrypt ( byte  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 74 of file block_cipher.h.

74 { decrypt_n(block, block, 1); }
virtual void decrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::AES_128_NI::decrypt_n ( const byte  in[],
byte  out[],
size_t  blocks 
) const
virtual

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 182 of file aes_ni.cpp.

References AES_DEC_4_LAST_ROUNDS, and AES_DEC_4_ROUNDS.

183  {
184  const __m128i* in_mm = (const __m128i*)in;
185  __m128i* out_mm = (__m128i*)out;
186 
187  const __m128i* key_mm = (const __m128i*)&DK[0];
188 
189  __m128i K0 = _mm_loadu_si128(key_mm);
190  __m128i K1 = _mm_loadu_si128(key_mm + 1);
191  __m128i K2 = _mm_loadu_si128(key_mm + 2);
192  __m128i K3 = _mm_loadu_si128(key_mm + 3);
193  __m128i K4 = _mm_loadu_si128(key_mm + 4);
194  __m128i K5 = _mm_loadu_si128(key_mm + 5);
195  __m128i K6 = _mm_loadu_si128(key_mm + 6);
196  __m128i K7 = _mm_loadu_si128(key_mm + 7);
197  __m128i K8 = _mm_loadu_si128(key_mm + 8);
198  __m128i K9 = _mm_loadu_si128(key_mm + 9);
199  __m128i K10 = _mm_loadu_si128(key_mm + 10);
200 
201  while(blocks >= 4)
202  {
203  __m128i B0 = _mm_loadu_si128(in_mm + 0);
204  __m128i B1 = _mm_loadu_si128(in_mm + 1);
205  __m128i B2 = _mm_loadu_si128(in_mm + 2);
206  __m128i B3 = _mm_loadu_si128(in_mm + 3);
207 
208  B0 = _mm_xor_si128(B0, K0);
209  B1 = _mm_xor_si128(B1, K0);
210  B2 = _mm_xor_si128(B2, K0);
211  B3 = _mm_xor_si128(B3, K0);
212 
213  AES_DEC_4_ROUNDS(K1);
214  AES_DEC_4_ROUNDS(K2);
215  AES_DEC_4_ROUNDS(K3);
216  AES_DEC_4_ROUNDS(K4);
217  AES_DEC_4_ROUNDS(K5);
218  AES_DEC_4_ROUNDS(K6);
219  AES_DEC_4_ROUNDS(K7);
220  AES_DEC_4_ROUNDS(K8);
221  AES_DEC_4_ROUNDS(K9);
223 
224  _mm_storeu_si128(out_mm + 0, B0);
225  _mm_storeu_si128(out_mm + 1, B1);
226  _mm_storeu_si128(out_mm + 2, B2);
227  _mm_storeu_si128(out_mm + 3, B3);
228 
229  blocks -= 4;
230  in_mm += 4;
231  out_mm += 4;
232  }
233 
234  for(size_t i = 0; i != blocks; ++i)
235  {
236  __m128i B = _mm_loadu_si128(in_mm + i);
237 
238  B = _mm_xor_si128(B, K0);
239 
240  B = _mm_aesdec_si128(B, K1);
241  B = _mm_aesdec_si128(B, K2);
242  B = _mm_aesdec_si128(B, K3);
243  B = _mm_aesdec_si128(B, K4);
244  B = _mm_aesdec_si128(B, K5);
245  B = _mm_aesdec_si128(B, K6);
246  B = _mm_aesdec_si128(B, K7);
247  B = _mm_aesdec_si128(B, K8);
248  B = _mm_aesdec_si128(B, K9);
249  B = _mm_aesdeclast_si128(B, K10);
250 
251  _mm_storeu_si128(out_mm + i, B);
252  }
253  }
#define AES_DEC_4_LAST_ROUNDS(K)
Definition: aes_ni.cpp:94
#define AES_DEC_4_ROUNDS(K)
Definition: aes_ni.cpp:85
void Botan::BlockCipher::encrypt ( const byte  in[],
byte  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 47 of file block_cipher.h.

Referenced by Botan::aont_package(), Botan::aont_unpackage(), Botan::OFB::cipher(), Botan::DESX::encrypt_n(), Botan::CFB_Encryption::set_iv(), Botan::OFB::set_iv(), Botan::XTS_Encryption::set_iv(), Botan::CFB_Decryption::set_iv(), and Botan::XTS_Decryption::set_iv().

48  { encrypt_n(in, out, 1); }
virtual void encrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::BlockCipher::encrypt ( byte  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 66 of file block_cipher.h.

66 { encrypt_n(block, block, 1); }
virtual void encrypt_n(const byte in[], byte out[], size_t blocks) const =0
void Botan::AES_128_NI::encrypt_n ( const byte  in[],
byte  out[],
size_t  blocks 
) const
virtual

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 106 of file aes_ni.cpp.

References AES_ENC_4_LAST_ROUNDS, and AES_ENC_4_ROUNDS.

107  {
108  const __m128i* in_mm = (const __m128i*)in;
109  __m128i* out_mm = (__m128i*)out;
110 
111  const __m128i* key_mm = (const __m128i*)&EK[0];
112 
113  __m128i K0 = _mm_loadu_si128(key_mm);
114  __m128i K1 = _mm_loadu_si128(key_mm + 1);
115  __m128i K2 = _mm_loadu_si128(key_mm + 2);
116  __m128i K3 = _mm_loadu_si128(key_mm + 3);
117  __m128i K4 = _mm_loadu_si128(key_mm + 4);
118  __m128i K5 = _mm_loadu_si128(key_mm + 5);
119  __m128i K6 = _mm_loadu_si128(key_mm + 6);
120  __m128i K7 = _mm_loadu_si128(key_mm + 7);
121  __m128i K8 = _mm_loadu_si128(key_mm + 8);
122  __m128i K9 = _mm_loadu_si128(key_mm + 9);
123  __m128i K10 = _mm_loadu_si128(key_mm + 10);
124 
125  while(blocks >= 4)
126  {
127  __m128i B0 = _mm_loadu_si128(in_mm + 0);
128  __m128i B1 = _mm_loadu_si128(in_mm + 1);
129  __m128i B2 = _mm_loadu_si128(in_mm + 2);
130  __m128i B3 = _mm_loadu_si128(in_mm + 3);
131 
132  B0 = _mm_xor_si128(B0, K0);
133  B1 = _mm_xor_si128(B1, K0);
134  B2 = _mm_xor_si128(B2, K0);
135  B3 = _mm_xor_si128(B3, K0);
136 
137  AES_ENC_4_ROUNDS(K1);
138  AES_ENC_4_ROUNDS(K2);
139  AES_ENC_4_ROUNDS(K3);
140  AES_ENC_4_ROUNDS(K4);
141  AES_ENC_4_ROUNDS(K5);
142  AES_ENC_4_ROUNDS(K6);
143  AES_ENC_4_ROUNDS(K7);
144  AES_ENC_4_ROUNDS(K8);
145  AES_ENC_4_ROUNDS(K9);
147 
148  _mm_storeu_si128(out_mm + 0, B0);
149  _mm_storeu_si128(out_mm + 1, B1);
150  _mm_storeu_si128(out_mm + 2, B2);
151  _mm_storeu_si128(out_mm + 3, B3);
152 
153  blocks -= 4;
154  in_mm += 4;
155  out_mm += 4;
156  }
157 
158  for(size_t i = 0; i != blocks; ++i)
159  {
160  __m128i B = _mm_loadu_si128(in_mm + i);
161 
162  B = _mm_xor_si128(B, K0);
163 
164  B = _mm_aesenc_si128(B, K1);
165  B = _mm_aesenc_si128(B, K2);
166  B = _mm_aesenc_si128(B, K3);
167  B = _mm_aesenc_si128(B, K4);
168  B = _mm_aesenc_si128(B, K5);
169  B = _mm_aesenc_si128(B, K6);
170  B = _mm_aesenc_si128(B, K7);
171  B = _mm_aesenc_si128(B, K8);
172  B = _mm_aesenc_si128(B, K9);
173  B = _mm_aesenclast_si128(B, K10);
174 
175  _mm_storeu_si128(out_mm + i, B);
176  }
177  }
#define AES_ENC_4_ROUNDS(K)
Definition: aes_ni.cpp:67
#define AES_ENC_4_LAST_ROUNDS(K)
Definition: aes_ni.cpp:76
Key_Length_Specification Botan::Block_Cipher_Fixed_Params< BS, KMIN, 0 , 1 >::key_spec ( ) const
inlinevirtualinherited
Returns
object describing limits on key size

Implements Botan::SymmetricAlgorithm.

Definition at line 110 of file block_cipher.h.

111  {
112  return Key_Length_Specification(KMIN, KMAX, KMOD);
113  }
size_t Botan::SymmetricAlgorithm::maximum_keylength ( ) const
inlineinherited
Returns
minimum allowed key length

Definition at line 33 of file sym_algo.h.

34  {
35  return key_spec().maximum_keylength();
36  }
size_t maximum_keylength() const
Definition: key_spec.h:69
virtual Key_Length_Specification key_spec() const =0
size_t Botan::SymmetricAlgorithm::minimum_keylength ( ) const
inlineinherited
Returns
maxmium allowed key length

Definition at line 41 of file sym_algo.h.

42  {
43  return key_spec().minimum_keylength();
44  }
size_t minimum_keylength() const
Definition: key_spec.h:61
virtual Key_Length_Specification key_spec() const =0
std::string Botan::AES_128_NI::name ( ) const
inlinevirtual
Returns
name of this algorithm

Implements Botan::Algorithm.

Definition at line 27 of file aes_ni.h.

27 { return "AES-128"; }
size_t Botan::BlockCipher::parallel_bytes ( ) const
inlineinherited
Returns
prefererred parallelism of this cipher in bytes

Definition at line 35 of file block_cipher.h.

References block_size.

36  {
37  return parallelism() * block_size() * BOTAN_BLOCK_CIPHER_PAR_MULT;
38  }
virtual size_t parallelism() const
Definition: block_cipher.h:30
virtual size_t block_size() const =0
size_t Botan::AES_128_NI::parallelism ( ) const
inlinevirtual
Returns
native parallelism of this cipher in blocks

Reimplemented from Botan::BlockCipher.

Definition at line 21 of file aes_ni.h.

21 { return 4; }
void Botan::SymmetricAlgorithm::set_key ( const SymmetricKey key)
inlineinherited
void Botan::SymmetricAlgorithm::set_key ( const byte  key[],
size_t  length 
)
inlineinherited

Set the symmetric key of this object.

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

Definition at line 68 of file sym_algo.h.

69  {
70  if(!valid_keylength(length))
71  throw Invalid_Key_Length(name(), length);
72  key_schedule(key, length);
73  }
bool valid_keylength(size_t length) const
Definition: sym_algo.h:51
virtual std::string name() const =0
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 51 of file sym_algo.h.

Referenced by Botan::aont_package(), Botan::aont_unpackage(), Botan::HMAC_RNG::HMAC_RNG(), Botan::Lion::Lion(), Botan::Randpool::Randpool(), and Botan::EAX_Base::valid_keylength().

52  {
53  return key_spec().valid_keylength(length);
54  }
bool valid_keylength(size_t length) const
Definition: key_spec.h:51
virtual Key_Length_Specification key_spec() const =0

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