Botan  1.10.9
Public Types | Public Member Functions | Protected Member Functions | Static Protected Attributes | List of all members
Botan::Noekeon_SIMD Class Reference

#include <noekeon_simd.h>

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

Public Types

enum  
 

Public Member Functions

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
 

Protected Member Functions

const SecureVector< u32bit > & get_DK () const
 
const SecureVector< u32bit > & get_EK () const
 

Static Protected Attributes

static const byte RC [17]
 

Detailed Description

Noekeon implementation using SIMD operations

Definition at line 18 of file noekeon_simd.h.

Member Enumeration Documentation

anonymous enum
inherited

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::Noekeon::clear ( )
virtualinherited

Zeroize internal state

Implements Botan::Algorithm.

Definition at line 204 of file noekeon.cpp.

References Botan::zeroise().

205  {
206  zeroise(EK);
207  zeroise(DK);
208  }
void zeroise(MemoryRegion< T > &vec)
Definition: secmem.h:415
BlockCipher* Botan::Noekeon_SIMD::clone ( ) const
inlinevirtual

Get a new object representing the same algorithm as *this

Reimplemented from Botan::Noekeon.

Definition at line 26 of file noekeon_simd.h.

26 { return new Noekeon_SIMD; }
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::Noekeon_SIMD::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

Reimplemented from Botan::Noekeon.

Definition at line 123 of file noekeon_simd.cpp.

References Botan::Noekeon::decrypt_n(), Botan::Noekeon::get_DK(), Botan::load_be(), NOK_SIMD_GAMMA, NOK_SIMD_THETA, and Botan::Noekeon::RC.

124  {
125  const SecureVector<u32bit>& DK = this->get_DK();
126 
127  SIMD_32 K0 = SIMD_32(DK[0]);
128  SIMD_32 K1 = SIMD_32(DK[1]);
129  SIMD_32 K2 = SIMD_32(DK[2]);
130  SIMD_32 K3 = SIMD_32(DK[3]);
131 
132  while(blocks >= 4)
133  {
134  SIMD_32 A0 = SIMD_32::load_be(in );
135  SIMD_32 A1 = SIMD_32::load_be(in + 16);
136  SIMD_32 A2 = SIMD_32::load_be(in + 32);
137  SIMD_32 A3 = SIMD_32::load_be(in + 48);
138 
139  SIMD_32::transpose(A0, A1, A2, A3);
140 
141  for(size_t i = 0; i != 16; ++i)
142  {
143  NOK_SIMD_THETA(A0, A1, A2, A3, K0, K1, K2, K3);
144 
145  A0 ^= SIMD_32(RC[16-i]);
146 
147  A1.rotate_left(1);
148  A2.rotate_left(5);
149  A3.rotate_left(2);
150 
151  NOK_SIMD_GAMMA(A0, A1, A2, A3);
152 
153  A1.rotate_right(1);
154  A2.rotate_right(5);
155  A3.rotate_right(2);
156  }
157 
158  NOK_SIMD_THETA(A0, A1, A2, A3, K0, K1, K2, K3);
159  A0 ^= SIMD_32(RC[0]);
160 
161  SIMD_32::transpose(A0, A1, A2, A3);
162 
163  A0.store_be(out);
164  A1.store_be(out + 16);
165  A2.store_be(out + 32);
166  A3.store_be(out + 48);
167 
168  in += 64;
169  out += 64;
170  blocks -= 4;
171  }
172 
173  if(blocks)
174  Noekeon::decrypt_n(in, out, blocks);
175  }
T load_be(const byte in[], size_t off)
Definition: loadstor.h:100
#define NOK_SIMD_GAMMA(A0, A1, A2, A3)
static const byte RC[17]
Definition: noekeon.h:33
#define NOK_SIMD_THETA(A0, A1, A2, A3, K0, K1, K2, K3)
void decrypt_n(const byte in[], byte out[], size_t blocks) const
Definition: noekeon.cpp:125
const SecureVector< u32bit > & get_DK() const
Definition: noekeon.h:43
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::Noekeon_SIMD::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

Reimplemented from Botan::Noekeon.

Definition at line 66 of file noekeon_simd.cpp.

References Botan::Noekeon::encrypt_n(), Botan::Noekeon::get_EK(), Botan::load_be(), NOK_SIMD_GAMMA, NOK_SIMD_THETA, and Botan::Noekeon::RC.

67  {
68  const SecureVector<u32bit>& EK = this->get_EK();
69 
70  SIMD_32 K0 = SIMD_32(EK[0]);
71  SIMD_32 K1 = SIMD_32(EK[1]);
72  SIMD_32 K2 = SIMD_32(EK[2]);
73  SIMD_32 K3 = SIMD_32(EK[3]);
74 
75  while(blocks >= 4)
76  {
77  SIMD_32 A0 = SIMD_32::load_be(in );
78  SIMD_32 A1 = SIMD_32::load_be(in + 16);
79  SIMD_32 A2 = SIMD_32::load_be(in + 32);
80  SIMD_32 A3 = SIMD_32::load_be(in + 48);
81 
82  SIMD_32::transpose(A0, A1, A2, A3);
83 
84  for(size_t i = 0; i != 16; ++i)
85  {
86  A0 ^= SIMD_32(RC[i]);
87 
88  NOK_SIMD_THETA(A0, A1, A2, A3, K0, K1, K2, K3);
89 
90  A1.rotate_left(1);
91  A2.rotate_left(5);
92  A3.rotate_left(2);
93 
94  NOK_SIMD_GAMMA(A0, A1, A2, A3);
95 
96  A1.rotate_right(1);
97  A2.rotate_right(5);
98  A3.rotate_right(2);
99  }
100 
101  A0 ^= SIMD_32(RC[16]);
102  NOK_SIMD_THETA(A0, A1, A2, A3, K0, K1, K2, K3);
103 
104  SIMD_32::transpose(A0, A1, A2, A3);
105 
106  A0.store_be(out);
107  A1.store_be(out + 16);
108  A2.store_be(out + 32);
109  A3.store_be(out + 48);
110 
111  in += 64;
112  out += 64;
113  blocks -= 4;
114  }
115 
116  if(blocks)
117  Noekeon::encrypt_n(in, out, blocks);
118  }
T load_be(const byte in[], size_t off)
Definition: loadstor.h:100
void encrypt_n(const byte in[], byte out[], size_t blocks) const
Definition: noekeon.cpp:87
#define NOK_SIMD_GAMMA(A0, A1, A2, A3)
static const byte RC[17]
Definition: noekeon.h:33
const SecureVector< u32bit > & get_EK() const
Definition: noekeon.h:38
#define NOK_SIMD_THETA(A0, A1, A2, A3, K0, K1, K2, K3)
const SecureVector<u32bit>& Botan::Noekeon::get_DK ( ) const
inlineprotectedinherited
Returns
const reference to decryption subkeys

Definition at line 43 of file noekeon.h.

Referenced by decrypt_n().

43 { return DK; }
const SecureVector<u32bit>& Botan::Noekeon::get_EK ( ) const
inlineprotectedinherited
Returns
const reference to encryption subkeys

Definition at line 38 of file noekeon.h.

Referenced by encrypt_n().

38 { return EK; }
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::Noekeon::name ( ) const
inlinevirtualinherited
Returns
name of this algorithm

Implements Botan::Algorithm.

Definition at line 25 of file noekeon.h.

25 { return "Noekeon"; }
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::Noekeon_SIMD::parallelism ( ) const
inlinevirtual
Returns
native parallelism of this cipher in blocks

Reimplemented from Botan::BlockCipher.

Definition at line 21 of file noekeon_simd.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

Member Data Documentation

const byte Botan::Noekeon::RC
staticprotectedinherited
Initial value:
= {
0x80, 0x1B, 0x36, 0x6C, 0xD8, 0xAB, 0x4D, 0x9A,
0x2F, 0x5E, 0xBC, 0x63, 0xC6, 0x97, 0x35, 0x6A,
0xD4 }

The Noekeon round constants

Definition at line 33 of file noekeon.h.

Referenced by Botan::Noekeon::decrypt_n(), decrypt_n(), Botan::Noekeon::encrypt_n(), and encrypt_n().


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